CA1189624A - Disturbance signal recording system - Google Patents
Disturbance signal recording systemInfo
- Publication number
- CA1189624A CA1189624A CA000407112A CA407112A CA1189624A CA 1189624 A CA1189624 A CA 1189624A CA 000407112 A CA000407112 A CA 000407112A CA 407112 A CA407112 A CA 407112A CA 1189624 A CA1189624 A CA 1189624A
- Authority
- CA
- Canada
- Prior art keywords
- recorder
- memory
- disturbance
- circuits
- disturbance signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/09—Digital recording
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D9/00—Recording measured values
- G01D9/02—Producing one or more recordings of the values of a single variable
- G01D9/10—Producing one or more recordings of the values of a single variable the recording element, e.g. stylus, being controlled in accordance with the variable, and the recording medium, e.g. paper roll, being controlled in accordance with time
- G01D9/16—Producing one or more recordings of the values of a single variable the recording element, e.g. stylus, being controlled in accordance with the variable, and the recording medium, e.g. paper roll, being controlled in accordance with time recording occurring at separated intervals, e.g. by chopper bar
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Recording Measured Values (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Facsimiles In General (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The system comprises a basic recorder module or delay element and is followed by a semiconductor buffer memory, digital interface circuits for transferring the recorded data, processing means, a printer and/or magnetic memory unit, a detachable programming terminal for the dialogue with the recorder and its programming, as well as a separate power supply for the working part, so that the latter is only supplied in the recording mode or during a connection of the terminal.
The system comprises a basic recorder module or delay element and is followed by a semiconductor buffer memory, digital interface circuits for transferring the recorded data, processing means, a printer and/or magnetic memory unit, a detachable programming terminal for the dialogue with the recorder and its programming, as well as a separate power supply for the working part, so that the latter is only supplied in the recording mode or during a connection of the terminal.
Description
DISTIJRBANCE SIGN~ RECORDING SYSTEM
~AC~GROUND 0~ ~HE INVEN~ION
~ he pre~e~t invention re~ates to disturbance si~nal recorders 9 also called fault recorders.
~hese devices have two characteristic operating modes, namely a watching mode during which only electrical input signals are moni-tored, and a recording mode during which the electrical input signals are e~fectively recorded. The start of recording is generally a few tenths of a second before the appearance of the disturbance or trouble in order to subsequently make it possible to obtain details of the complete history thereof.
~here are two main types of disturbance signal recorders, namely electromechanical and electronic recorders, but the present invention relates to the latter type.
According to a first known embodimen-t falling in this category, an electronic device producing a time lag or delay is inserted upstream of the de~ice for writing on paper, which uses optical galvanometers, a halogen lamp and a photosensitive paper, ~or this purpose elec-trical input signals, after undergoing anal~g-digital conversion, pass through the delay device or pretriggering memory or store formed with the aid of a shift register and are then reconverted into analog signals for application to -the galvanometers. ~his solution has a number of disadvantages due essentially to the writing devices used. Galvanometers with halogen lam~s are expensi~e and the fact that they are constantly supplied with power is prejudicial to their reliabilityA In addition, the need to periodically replace the roll of paper used leads 6~
3, to high operclting cocts. ~inally, the photosen~itive paper of t~e writing or recordin~
device has a poor storage life, both before and after use.
Accordin~ to a second known solution, certain Or these disadvantages are obviated by using a conventional writing or recording device having stylets, so that costs are reduced and the paper has a good life. However9 the stylet recorder has a reduced pass band of approximately 30 H~ at the most and for reproducing signals with a hi~her frequency a device i~ provided for 510wing dowm the signals to make them compatible with the stylet recorder. ~his device is constituted by a so~id state electronic memor~Tt which is inserted between the shift register, iOe. the pretriggering memory, and digital-analog reconversion circuits.
A disadvant2ge of the stylet recording device is the difficulty of reproducing in a simple manner and at -the same time as the input si~als 9 the date information necessary for process.ng the recordings.
In addition, these two solutions have two important deficiencies. The first is the need of systematically replacing the roll of paper and the second is the lack of fleYibility of the informatior support, a diagram on paper not really bein~
suitable for automatic analysis and digital processing without the use of a human operator.
~ third solution obviating the aforementioned difficulties is described in French Patent
~AC~GROUND 0~ ~HE INVEN~ION
~ he pre~e~t invention re~ates to disturbance si~nal recorders 9 also called fault recorders.
~hese devices have two characteristic operating modes, namely a watching mode during which only electrical input signals are moni-tored, and a recording mode during which the electrical input signals are e~fectively recorded. The start of recording is generally a few tenths of a second before the appearance of the disturbance or trouble in order to subsequently make it possible to obtain details of the complete history thereof.
~here are two main types of disturbance signal recorders, namely electromechanical and electronic recorders, but the present invention relates to the latter type.
According to a first known embodimen-t falling in this category, an electronic device producing a time lag or delay is inserted upstream of the de~ice for writing on paper, which uses optical galvanometers, a halogen lamp and a photosensitive paper, ~or this purpose elec-trical input signals, after undergoing anal~g-digital conversion, pass through the delay device or pretriggering memory or store formed with the aid of a shift register and are then reconverted into analog signals for application to -the galvanometers. ~his solution has a number of disadvantages due essentially to the writing devices used. Galvanometers with halogen lam~s are expensi~e and the fact that they are constantly supplied with power is prejudicial to their reliabilityA In addition, the need to periodically replace the roll of paper used leads 6~
3, to high operclting cocts. ~inally, the photosen~itive paper of t~e writing or recordin~
device has a poor storage life, both before and after use.
Accordin~ to a second known solution, certain Or these disadvantages are obviated by using a conventional writing or recording device having stylets, so that costs are reduced and the paper has a good life. However9 the stylet recorder has a reduced pass band of approximately 30 H~ at the most and for reproducing signals with a hi~her frequency a device i~ provided for 510wing dowm the signals to make them compatible with the stylet recorder. ~his device is constituted by a so~id state electronic memor~Tt which is inserted between the shift register, iOe. the pretriggering memory, and digital-analog reconversion circuits.
A disadvant2ge of the stylet recording device is the difficulty of reproducing in a simple manner and at -the same time as the input si~als 9 the date information necessary for process.ng the recordings.
In addition, these two solutions have two important deficiencies. The first is the need of systematically replacing the roll of paper and the second is the lack of fleYibility of the informatior support, a diagram on paper not really bein~
suitable for automatic analysis and digital processing without the use of a human operator.
~ third solution obviating the aforementioned difficulties is described in French Patent
2 429 998. The useful input signals are recorded on a flexi~le disk magnetic memory inserted between the shift register constituting the ~o-called Q~
pretriggering memory and the digital-analog conversion circuits preceding a recorder on paper, The capacity of the disk memory is equivalent to several rolls of paper. ~hus, the size of this memory makes it possible to consider-ably reduce the frequency with which the rolls of paper .are replaced~ If the writing or recording device i~ detachable, the operator can tran~port it with him and reproduce on the paper the recordings of the day of hi.s or her visit.
~ he disadvantages of this latter electronic solution are mainly in the type of memory used~
the latter forming an integral par-t of the recording chain. ~or certain applications, such as the monitoring of electri.c power transmission lines in tropical countries, the characteris-tics of the flexible disks (tempera-ture range for use 5 to 45C, permitted relative hu~idity 20 -to 80%) may prove inadequa-te. Moreover, a breakdown in' the flexible disk memory automatically lea.ds to a failure of the recorder which, from then on, is no longer able to collect new information.
SUMMARY 0~ ~HE lNV~N~l~lON
One object of the present invention is to provide a. disturbance signal recorder system eliminating the disadva~tages of -the precedlng solutions, whilst offering the advantages of each of them. In particu.lar the system uses a buffer memory having a relatively large capacity~ which can work in combination with an economic writing or recording device permit-ting both alphanumeric entries (dating and identi:ication) and graphic entries on a paper which is stable'before and after use~
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As can be ga.thered from the following de~cription, the system also provides specific advantages, the mos-t important ~eing programmabi].it.y of characteris-tics, easy remote transmission of data and comparibility with automati.c analysis and digital processing means, great flexibility permitting combinations with high-performance peripheral modules, high reliability due to the use of s-tatic components and low electric power con~umption when operating in the watching mode.
~ he present invention therefore provides a disturbance signal recorder system comprising a fixed part, called the disturbance signal recorder installed at a recording point and set up so as to receive elec-tric signals to be monitored and record disturbance, a separa-te complementary,part comprising recorded da-ta processing means, and electrical connection means between the two parts, the interfering sigrlal recorder comprising, connected in series, means for the reception and matching of electrical input signals, analog-digital conversion and multiplexing means, a first or so-called pretriggering memory for producing a delay and a second memory for recordlng disturbance., the recorder also comprising means for the de-tection of disturbance supplied by the reception and ma-tching means, a time da-ting device, control and management mean~ having a central unit for checking the conversion an.d multiplexing means and for controlling the recording in the second memory, and auxiliary signal generator circuits, wherein the second memory is a semiconductor buffer memory having a predetermined capacity for a storage of data to be subsequently transmitted to the processing par-t, said disturbance signal recorder also lncorporating separate supply means for supplying the buffer memor,y and the auxiliary signal generator solely when disturbance or trouble is occurring, dialogue and programming means in the form of a detachable device, digital interface circuits constituting the said connection means between on the one hand the recorder and the processing means and between on the other the recorder and the dialog and programming device.
BRIE~ DESCRIPTION 0~ ~HE DRAWINGS
~ ~~he invention is described in greater detail hereinafter relative to non-limitative embodiments and the attached drawings, wherein show:
Fig. 1 a block diagram of an disturban~e signal recorder system according to the inventi~n.
~igs. 2 diagrams relating to different modular ~ to 5 embodiments of an disturbance signal recorder system according to the invention.
~ig. 6 a flowchart of a system according to the invention.
~ATTFn D~SCRIP~ION OF r~H~ PRE~ERRED ~3ODIMEN~S
A disturbance signal trouble recorder system according to the invention comprises several assemb]ies or modules. ~hese can be subdivided into a ~irs-t part installed as a fixed station a-t a recording point and which constitutes the basic module or disturbance signal recorder ~P, whose function is to monitor the electric input signals and record possible disturbance in a solid state memory forming a buffer. ~here is also a second part, which can be installed in the vicinity of recorder ~P or at a distance therefrom~ ~he lat-ter may be in accordance with a centralized processing by several in~erfering signal recorders ~P. ~his second part ~X can be constructed in various ways and essentially comprises means for processing data recorded in module ~P. Processing part ~X
can be reali~ed by means of a paper printer IP
or can incorporate a memory unit UM, as will be sho~n hereinafter, In Fig. 1 the ~isturbance signal recorder system iæ represented by its essential components 9 namely the actual recorder ~P, the processing circuits EX and a programming terminal r~p. r~he original construction of recorder ~P ensures the high degree of flexibility of the system.
Recorder EP incorporates connection means for the recep-tion of input signals to be monitored.
Connection takes place on terminals 31 to ~n able to receive up to n input signals S~1 to S~n. The input terminals are connected to a group of matching rirCuits l,which are connected to the channels for which matching is provided (matching of level, pass band, etc.).
r~he signals leaving unit 1 are -transmitted on the one hand to analog/digital conversion and multiplexing circuits 2 and on the other to disturbance signal detection circuits 3.
lhe conversion into digital form of the signals received in analog form can be carried out before or after multiplexing. In the latter case it is merely necessary to have a single conversion circ~it, but the reliabili-ty of the system is better with the first option~ Obviously the system can also receive signals in digital form, which are dlrectly transmitted to the multiplexing circuits 2, Ei2~
as well as to the detection circuits 3. ~he digital signals are rece:ived at terminals B'1 to ~~ In the case of analog signalsS the detection cixcuits 3 operate by threshold comparisons, fi~ter-ing or other procedures for the purpose of detecting specific disturbance , which can be in the form of an a~plitude varia-tion, a frequency variation or a ~ariation of some other characteristic parameter of the corresponding input signal. In the case of digital signals, the detection of interference is based on the detection of the changed state of one or more inputs.
The multiplexing output S1 is transmitted to a pretriggering memory 4 of the shift register type to introduce a given delay which makes it possible, during the detection of interference by circuit 3, ~o record in a downstream circuit the position prior to the disturbance for a given time which is essentially equivalent to the said delay 9 e.gO of approximately a few tenths of a second. Memory 4 is connected by its outpu-t S2 to a second memory 5 for recording disturbance.
A circuit 6 processes the con-trol and synchronization signals S3 relative to conversion and multiplexing circuits 2. By link S4 it controls the recording of disturbance and to this end one output S5 of circui-t 3 is transmitted to circuit 6 across a time dating device 7~
~he time dating device 7 serves to supply a very precise dating, e.g. to within one thousandth of a second for each disturbance signal or the like.
~his information, as well as the date, is transmitted by link S6 to circuit 6 to be recorded '7 2~
in the second me~ory 5 a,t the head of each rccording in the forrn of an identifier containin~ in digital form all the information for the subsequent process~
ing of the data, ~amel~ thc characteristics of the position and apparatus where the recording was carried out, together with the date and duration thereof.
Time dating device 7 uses circuits having a low electrical power consumption, e.g. of C/MOS
technology. An accumulator 10A permanently charged by power supply 10 is used as an emergency supply for time dating device 7 via link S10 in the case of a temporary interruption of the general power supply 10. Link S11 connects the time dating device to the outside to enable it to receive or transmit synchronizin~ signals. The la~ter can come from an external clock HX (~ig. 3) or some other recorder ~P (~ig. 5) and can be passed to one or several other recorders EP.
Circuit 6 comprises a central unit and associated circuits 2 for forming a microprocessor or microcomputer. Therefore it is also provided with variable input and programme memories, constant data memories and bus links with the input/output circuits. Its structure is of a conventional nature and reference can be made in this connection e.g. -to -the docl~ent published by the MOTOROIA
company entitled: "M 6$00 Microcomputer System Design Data".
Cen~ral unit 6 con-trols the writing into memory 5 and subsequently the reading of the memory for transmitting the data to the processing means across interface circuits 8.
2~
~ hu , a first fea~ture of the system results ~rom the I`act that the external links of recorder ~P take place by digital interface circuits. '~here is no digital-ana]og reconversion at the output of -the second ~emory~ ~he connection between recorder ~P and processing me~ns ~X can be in the form of a st~ndard digital link 9 e.g~ of the RS232 type~
~his arrangement, which renders superfluo~s a multiplexing operation and a digital-analog reconversion operation, also has the advantage of "scratching" the output signals, thus making it possible to~connec-t numerous ancillary devices particularly of the informatics type to the recorder EP.
~he disturbance signal recorder EP also comprises in per se known manner, so called auxiliary circuits 9 for processing service signals indicating e.g. by the closing of a relay contact that recording is taking place or for controlling the making live of the ancillary equipment for receiving the data.
~hese service signals are transmitted -to the outside in digital ~orm across interface circuits 8.
A second feature of the recorder is that memory 5 is a static memory instead of being a disk or tape memory. Semiconductor memory 5 has a capacity which, on average, can be e.g. about 10 seconds of recording. In fact i-t forms a buffer memory be-tween the recorder and the external analysis and processing means EX~
According to a third feature of the system, recorder EP is subdivided into -two parts, namely a con~tantly supplied watching part EPV and a working part ~Pl, which only receives power in the recording mode~ -In actual fact part ~P~ is also supplied when , . .
6~
recorder ~P is used with programming terminal ~P, in the manner described hereinafter. ~his is brought about by means of separate supplies for each of the parts, power supply 10 relating to the watching part and rendering live the circuits involved in ~his part as soon as -the recorder is started up. ~he second power supply 11 relating to the working part ~P~ is only triggered by output S7 of detector 3 during the detec-tion of interference in order to render live the circuits of the working part. ~ollowing a corresponding recording in memory 5 the central unit, via link S8, controls the stopping of the power supply of the working part by circuit 11. However, a manual control 12 makes it possible for the working part ~PT to be made live by the operator during the use of the programming termi n~l ~P. Warking part ~P~
incorporates the second or buffer memory 5, auxiliary circuits 9, interface circuits 8, as well as a programmed read-only memory 13, which is used by the bias of the central unit 6 during dialogue with recorder ~P by means of programming terminal ~P. It should also be noted that central unit 6 can form part of the working part ~P~ by means of the use of a second central unit in the watching part ensuring the control links S3 to the conversion and multiplexing circui-ts 2 and S9 to -the detector circuits 3. ~ink S9 makes lt possible for central unit 6 to interrogate circuit 3 in order to obtain in~ormation on the origin of the triggering process and can then place this information in the identifier at the head of the recording.
When a second central unit or a small microprocessor is used, said second unit is obviously connected to the central unit located in the working part.
As a result of the subdivision of recorder ~P into two separa-te and en-tirely static parts, whereof only the watching part is constantly live, the average absorbed part is greatly red~ced and reliability is high. ~or information, the power can be below 20 Watts.
~ fourth feature of the system is the possibility of programming certain of its charac-teristics, such as the pass band, the sensitivity, the duration of the recordings, and the service identifications, which makes it possible to use it for developing the recordings according to the particular needs. This results from the use o~ a conventional programming terminal TP constitu-ted by a portable terminal having the size of a pocket calculator and which can therefore be easily transported. In the same recorder ~P, terminal TP
comprises a central unit 21 whose programmes can evolve. It is connected to digital interface links at ~ and makes it possible to produce all the controls and programming~ whilst permitting a dialogue betwe~n the operator and the recorder ~P as a result of the alphanu~leric dlsplay on ~-terminal TP. Thus, the interfering signal recorder ~P can be designed with a box or case having substantially no manual controls on the front face, which makes it possible to grea-tly cut down costs. The dialogue and programming by the bias of terminal TP are made possible as a result of central unit 6 which, in the read-only memory 13 programmed for this purpose~ can convert the dialogue of the informa-tics type into dialogue which can be e~sily interpreted by a not specially trained operator. ~he ROM 13 i5 the equivalent of a dictionary and can be changed when the language of the opera-tor changes. ~or information purposes it is poin-ted out that the essential cornponents of programming terminal ~P are a series interface 20, central unit 21, a character generator 22, keyboard 23 and a display 24, apart from a power supply 25, which is controlled from power supply 11, which i~ started up by clo~ing contact door 12. ~he latter can also be brought into the closed position by the m~h anlcal locking or engagement of the connection of the programming terminal.
~he disturbance signal recorder ~P can ~e combined with a printer IP consti~tuting the processing circuits ~X, so as to reproduce on paper the elements stored in buffer 5. As shown in ~ig.
2, printer IP can be of any random -type, provided that it can operate both in the graphic mode for plotting curves and in the alphanumeric mode for entering date and other data and provided that it can be remotely started up (i.e. made live by control of recorder ~P). Thus, it is possible to use a thermal 9 electrosensitive, optlcal fibre cathode ray -tube or laser printer and the user can choose as a function of requirements. ~he arrangement does not suf~er ~rom the disadvantage o~ loss of monitoring in the case o~ the paper ending or the printer ~ailing. ~hus, memor~ 5 generally has an adequate capacit~ -to be able to await the arrival o~ the operator, whilst bein~
ready to store any other possible recordings.
Programming termi n~l ~P is sh~ n in dotted line form, because it is normally transported by the ., ~3~
operator and is not involved in the normal ope~ation of the recorder.
~ ig. 3 shows a variant of the preceding combi~a-tion in which several disturbance recorders ~P1, EP2, etc. are combined with a single printer IP by the bias of a connection box ~ serving as a ~ultiplexing circuit, in such a way that dialogue is successively possible with the different recorders EP1, ~P2, etc. connected by their synchronizing inputs/outputs to an external clock ~X .
- The constructions according to Eigs. 2 or 3 involve an operator movlng or replacing the roll of paper. This can be disadvantageous when movements are restricted, so that recorder ~P
according to ~ig. 4 or recorders ~P19 ~P2, etc.
according to ~ig. 5 are connected (across a connecting circ-uit ~ in the latter option) to a magnetic memory or store, whose capacity can be very high, e.gO several thousand seconds. lhis amounts to introducing a third memory in the data chain, namely unit U~, whose capacity is much higher than that of upper memory 5. The user is able to choose the most suitable magnetic memory unlt for his requirements, as a function of the sought capacity and the environmen-tal conditions.
~his is obviously particularly advan-tageous in the case of remote connection concepts, when the ~ management of one or, in general, several interfering signal recorders is centrali~ed. In this case it is necessary to combine with recorder EP a supplementary interface component adapted to the remote connection mode (telephone lines~ high voltage lines, optical fibres, radio links, e-tc.)9 whereby this component can be e.g. a modulator~
demodula-tor in the case of a telephone link. Units UMM can be of t~e flexible disk or magnetic tape type, said two supports being detachable, or it is also possible to use memory units of the fixed disk~
magnetic bubble or other -types. In each o~ -these cases the operator can program~e recorder ~P in such a way that when the memory support is full in magnetic memory unit UMM~ it erases the oldest recordings and replaces -them by more recen-t recordings.
In the arrangements of ~igs. 4 or 5~ which use a magnetic memory unit UMM, a printer IP is indicated by dot-ted lines and it is possible to reproduce on the latter the recording when this is desired by the operator. Printer IP can be carried to the location by the operator at the same time as terminal TP. ~y means of the central unit 6 of recorder ~P or one of them (case of ~ig. 5)? the operator transfers data from the magnetic memory unit UMM to prin-ter IP~ In the described arrangements incorporating one or more recorders ~P, it should be noted that decisions are centralized by the recorder and not by the associated peripheral equipmen-t. As by definition -disturbance is of a random nature, it can intervene during a dialogue or a data transmission. The central uni-t 6 is programmed in such a way that the recording ~unctinn has an absolute priority and the central unit interrupts the link between -the recorder and i-ts peripheral equipment when this is necessary.
It should also be noted that a test of satisfactory operation can be required by cen-tral unit 6 of recorder ~P in connection with the periphe~al e~uipment be~ore or after each use or in a periodic manner, in order to check that the system is ready to operate. This test is received by the recorder in the form of a digital state word and is analyæed by central unit 6 and can lead to the operator being called3 when a fault is detected. ~his call takes place by means of auxiliary circuits ~. The opera-tor then has access to the state word characterizing the fault by using programming terminal TP. ~or information purposes auto-test circuits 30 are shown in the processing part of ~ig. 19 said circuits serving to supply the digital state word corresponding to the satisfactory operation test on interrogation of the central unit 6. Circuits 30 can be designed in per se known manner and reference can be made in this connection to the document "Preliminary OEM Manual for a Eloppy disk controller~published by Scientific Micro Systems 777 East Middlefield Road, Mountain View~ Calif. 94043 - published December 9, 1977' With regards to the magnetic memory unit UMM~ reference can be made e.g. to the document "EX ~01~820 Printers User Manual", published by~AXIOM, April 1979~
~îg. 6 shows a flow char-t of an disturbance signal recording system according to the invention.
The vertical, left-hand diagram relates to the testing and operations of the watching par-t EP~.
Stage 100 corresponds to the initialization of par-t EPV, i.e. to it being made live. ~est s-tage 101 represents the wait from sampling control S3 processed by the central unit or a microprocessor 6. This is follo~ed by the cyclic scrutini~ation or scanning operation 1025 i.e. the sampling of 2~
signals by multiplexer at 2 on periodic control by signal S3. ~he following operation 103 is the orlentation of the digital result S1 of the scrutinization into the pretriggering memory 4~
~he digital data are entered in memory 4 in place of ~he oldest data previously there. ~he oldest data are then either elimin.ated, or transmitted to the buffer m~mory 5, as will be shown hereinafter during the analysis of the diagram ~P~. S-tage 104 corresponds -to control calculations performed by the central unit for making the sampling frequency dependent on the fluctuations of the signal ~requency -to be checked, in such a way that substantially the same samples of the considered signal are selected during the successive cycles thereof. This operation makes it possible to prepare the sampled signals for subsequent processing by compression reserved for the signals resul-ting from interference and therefore, said processing is only performed in working part EP~. Operation 104 results from the programming of central unit 6. ~he result of the control calculations influences the samplin~
frequency given by control signal S3.
~he central diagram relates to the test, and operations of the working part EP~. Initialization in 110 is controlled by signal S7 which releases power supply 11. Stage 111 represents the recording cause test, which can result from distur~ance detection (to 112) or an auto-test control (to 121) or an operator di~logue request (to 125). In the case of disturbance detection9 the corresponding signal is S6 received by central unit 6. Stage 112 is the test controlled by unit 6 of the state of )6;;~
memory 4~ whe~her or not the latter is full. If it is not full, ~illing continues~ If it is full 9 opera-tion 113 consisting of reading the oldest data stored in 4 takes place. Stage 114 is the operation of orienting said data (after processing by possible compression) into mass memory 5. r~est 115 correspond~ to the end of recording in memory 5, i.e. the end of the disturbance to be recorded.
It is possible here to have several dif~erent 1~ operating types and, for e~ch of them, a predetermined recording time as a function of the preprogrammed rules. ~est 116 corresponds to a programmed output to a peripheral device and stage 11l~ in the affirmative, to the transfer operation to a magnetic memory unit UMM or external printer IP. Stage 118 is ~he end of recording.
~ he right-hand diagram sho~s at 120 the tes-t cause of the initialization o~ the ~P~ in the absence of disturbance~. Stage 121 repres~nts the auto-test oper~tion triggered ~y circuit 30 of the processing part. It can also represent a periodic test and automatic operation, programmed.by central unit 6 and initiated by a signal from the time dating device 7~ Fault test 122 means that central unit 6 interprets the test results and determines whether or not there is a fault. In the affirmative, the unit triggers off the alarm operation 123 by circuit 9 to the outside. Stage 124 is~the end of this sequence.
The final stage 125 represents an activation of the EPT ~rom programming term~nal TPt i~e. the operator dialogue operation.
An disturbance signal record-ing system according to thé~ in~ention provides the user with %~
economic means, as a result of lts optimized design~ and modular structure compatible with all conventional informatics means for recording electric signals with random recurrences, such as disturbance occurring in the transmission of electric power. As a result of its digital design it is possible to remotely transmit data and directly process magnetic supports recorded by conventional informatics means. However, its use is not limited to the monitoring of electricity systems. lhe sys-tem can be used in research laborator;es, -the iron and steel industry (e.g.
power supply for furnaces) 7 the medical field (monitoring patients)S computer power supplies, chemical industry, as well as the generation or conversion of energy.
o 1g , .
pretriggering memory and the digital-analog conversion circuits preceding a recorder on paper, The capacity of the disk memory is equivalent to several rolls of paper. ~hus, the size of this memory makes it possible to consider-ably reduce the frequency with which the rolls of paper .are replaced~ If the writing or recording device i~ detachable, the operator can tran~port it with him and reproduce on the paper the recordings of the day of hi.s or her visit.
~ he disadvantages of this latter electronic solution are mainly in the type of memory used~
the latter forming an integral par-t of the recording chain. ~or certain applications, such as the monitoring of electri.c power transmission lines in tropical countries, the characteris-tics of the flexible disks (tempera-ture range for use 5 to 45C, permitted relative hu~idity 20 -to 80%) may prove inadequa-te. Moreover, a breakdown in' the flexible disk memory automatically lea.ds to a failure of the recorder which, from then on, is no longer able to collect new information.
SUMMARY 0~ ~HE lNV~N~l~lON
One object of the present invention is to provide a. disturbance signal recorder system eliminating the disadva~tages of -the precedlng solutions, whilst offering the advantages of each of them. In particu.lar the system uses a buffer memory having a relatively large capacity~ which can work in combination with an economic writing or recording device permit-ting both alphanumeric entries (dating and identi:ication) and graphic entries on a paper which is stable'before and after use~
62~
As can be ga.thered from the following de~cription, the system also provides specific advantages, the mos-t important ~eing programmabi].it.y of characteris-tics, easy remote transmission of data and comparibility with automati.c analysis and digital processing means, great flexibility permitting combinations with high-performance peripheral modules, high reliability due to the use of s-tatic components and low electric power con~umption when operating in the watching mode.
~ he present invention therefore provides a disturbance signal recorder system comprising a fixed part, called the disturbance signal recorder installed at a recording point and set up so as to receive elec-tric signals to be monitored and record disturbance, a separa-te complementary,part comprising recorded da-ta processing means, and electrical connection means between the two parts, the interfering sigrlal recorder comprising, connected in series, means for the reception and matching of electrical input signals, analog-digital conversion and multiplexing means, a first or so-called pretriggering memory for producing a delay and a second memory for recordlng disturbance., the recorder also comprising means for the de-tection of disturbance supplied by the reception and ma-tching means, a time da-ting device, control and management mean~ having a central unit for checking the conversion an.d multiplexing means and for controlling the recording in the second memory, and auxiliary signal generator circuits, wherein the second memory is a semiconductor buffer memory having a predetermined capacity for a storage of data to be subsequently transmitted to the processing par-t, said disturbance signal recorder also lncorporating separate supply means for supplying the buffer memor,y and the auxiliary signal generator solely when disturbance or trouble is occurring, dialogue and programming means in the form of a detachable device, digital interface circuits constituting the said connection means between on the one hand the recorder and the processing means and between on the other the recorder and the dialog and programming device.
BRIE~ DESCRIPTION 0~ ~HE DRAWINGS
~ ~~he invention is described in greater detail hereinafter relative to non-limitative embodiments and the attached drawings, wherein show:
Fig. 1 a block diagram of an disturban~e signal recorder system according to the inventi~n.
~igs. 2 diagrams relating to different modular ~ to 5 embodiments of an disturbance signal recorder system according to the invention.
~ig. 6 a flowchart of a system according to the invention.
~ATTFn D~SCRIP~ION OF r~H~ PRE~ERRED ~3ODIMEN~S
A disturbance signal trouble recorder system according to the invention comprises several assemb]ies or modules. ~hese can be subdivided into a ~irs-t part installed as a fixed station a-t a recording point and which constitutes the basic module or disturbance signal recorder ~P, whose function is to monitor the electric input signals and record possible disturbance in a solid state memory forming a buffer. ~here is also a second part, which can be installed in the vicinity of recorder ~P or at a distance therefrom~ ~he lat-ter may be in accordance with a centralized processing by several in~erfering signal recorders ~P. ~his second part ~X can be constructed in various ways and essentially comprises means for processing data recorded in module ~P. Processing part ~X
can be reali~ed by means of a paper printer IP
or can incorporate a memory unit UM, as will be sho~n hereinafter, In Fig. 1 the ~isturbance signal recorder system iæ represented by its essential components 9 namely the actual recorder ~P, the processing circuits EX and a programming terminal r~p. r~he original construction of recorder ~P ensures the high degree of flexibility of the system.
Recorder EP incorporates connection means for the recep-tion of input signals to be monitored.
Connection takes place on terminals 31 to ~n able to receive up to n input signals S~1 to S~n. The input terminals are connected to a group of matching rirCuits l,which are connected to the channels for which matching is provided (matching of level, pass band, etc.).
r~he signals leaving unit 1 are -transmitted on the one hand to analog/digital conversion and multiplexing circuits 2 and on the other to disturbance signal detection circuits 3.
lhe conversion into digital form of the signals received in analog form can be carried out before or after multiplexing. In the latter case it is merely necessary to have a single conversion circ~it, but the reliabili-ty of the system is better with the first option~ Obviously the system can also receive signals in digital form, which are dlrectly transmitted to the multiplexing circuits 2, Ei2~
as well as to the detection circuits 3. ~he digital signals are rece:ived at terminals B'1 to ~~ In the case of analog signalsS the detection cixcuits 3 operate by threshold comparisons, fi~ter-ing or other procedures for the purpose of detecting specific disturbance , which can be in the form of an a~plitude varia-tion, a frequency variation or a ~ariation of some other characteristic parameter of the corresponding input signal. In the case of digital signals, the detection of interference is based on the detection of the changed state of one or more inputs.
The multiplexing output S1 is transmitted to a pretriggering memory 4 of the shift register type to introduce a given delay which makes it possible, during the detection of interference by circuit 3, ~o record in a downstream circuit the position prior to the disturbance for a given time which is essentially equivalent to the said delay 9 e.gO of approximately a few tenths of a second. Memory 4 is connected by its outpu-t S2 to a second memory 5 for recording disturbance.
A circuit 6 processes the con-trol and synchronization signals S3 relative to conversion and multiplexing circuits 2. By link S4 it controls the recording of disturbance and to this end one output S5 of circui-t 3 is transmitted to circuit 6 across a time dating device 7~
~he time dating device 7 serves to supply a very precise dating, e.g. to within one thousandth of a second for each disturbance signal or the like.
~his information, as well as the date, is transmitted by link S6 to circuit 6 to be recorded '7 2~
in the second me~ory 5 a,t the head of each rccording in the forrn of an identifier containin~ in digital form all the information for the subsequent process~
ing of the data, ~amel~ thc characteristics of the position and apparatus where the recording was carried out, together with the date and duration thereof.
Time dating device 7 uses circuits having a low electrical power consumption, e.g. of C/MOS
technology. An accumulator 10A permanently charged by power supply 10 is used as an emergency supply for time dating device 7 via link S10 in the case of a temporary interruption of the general power supply 10. Link S11 connects the time dating device to the outside to enable it to receive or transmit synchronizin~ signals. The la~ter can come from an external clock HX (~ig. 3) or some other recorder ~P (~ig. 5) and can be passed to one or several other recorders EP.
Circuit 6 comprises a central unit and associated circuits 2 for forming a microprocessor or microcomputer. Therefore it is also provided with variable input and programme memories, constant data memories and bus links with the input/output circuits. Its structure is of a conventional nature and reference can be made in this connection e.g. -to -the docl~ent published by the MOTOROIA
company entitled: "M 6$00 Microcomputer System Design Data".
Cen~ral unit 6 con-trols the writing into memory 5 and subsequently the reading of the memory for transmitting the data to the processing means across interface circuits 8.
2~
~ hu , a first fea~ture of the system results ~rom the I`act that the external links of recorder ~P take place by digital interface circuits. '~here is no digital-ana]og reconversion at the output of -the second ~emory~ ~he connection between recorder ~P and processing me~ns ~X can be in the form of a st~ndard digital link 9 e.g~ of the RS232 type~
~his arrangement, which renders superfluo~s a multiplexing operation and a digital-analog reconversion operation, also has the advantage of "scratching" the output signals, thus making it possible to~connec-t numerous ancillary devices particularly of the informatics type to the recorder EP.
~he disturbance signal recorder EP also comprises in per se known manner, so called auxiliary circuits 9 for processing service signals indicating e.g. by the closing of a relay contact that recording is taking place or for controlling the making live of the ancillary equipment for receiving the data.
~hese service signals are transmitted -to the outside in digital ~orm across interface circuits 8.
A second feature of the recorder is that memory 5 is a static memory instead of being a disk or tape memory. Semiconductor memory 5 has a capacity which, on average, can be e.g. about 10 seconds of recording. In fact i-t forms a buffer memory be-tween the recorder and the external analysis and processing means EX~
According to a third feature of the system, recorder EP is subdivided into -two parts, namely a con~tantly supplied watching part EPV and a working part ~Pl, which only receives power in the recording mode~ -In actual fact part ~P~ is also supplied when , . .
6~
recorder ~P is used with programming terminal ~P, in the manner described hereinafter. ~his is brought about by means of separate supplies for each of the parts, power supply 10 relating to the watching part and rendering live the circuits involved in ~his part as soon as -the recorder is started up. ~he second power supply 11 relating to the working part ~P~ is only triggered by output S7 of detector 3 during the detec-tion of interference in order to render live the circuits of the working part. ~ollowing a corresponding recording in memory 5 the central unit, via link S8, controls the stopping of the power supply of the working part by circuit 11. However, a manual control 12 makes it possible for the working part ~PT to be made live by the operator during the use of the programming termi n~l ~P. Warking part ~P~
incorporates the second or buffer memory 5, auxiliary circuits 9, interface circuits 8, as well as a programmed read-only memory 13, which is used by the bias of the central unit 6 during dialogue with recorder ~P by means of programming terminal ~P. It should also be noted that central unit 6 can form part of the working part ~P~ by means of the use of a second central unit in the watching part ensuring the control links S3 to the conversion and multiplexing circui-ts 2 and S9 to -the detector circuits 3. ~ink S9 makes lt possible for central unit 6 to interrogate circuit 3 in order to obtain in~ormation on the origin of the triggering process and can then place this information in the identifier at the head of the recording.
When a second central unit or a small microprocessor is used, said second unit is obviously connected to the central unit located in the working part.
As a result of the subdivision of recorder ~P into two separa-te and en-tirely static parts, whereof only the watching part is constantly live, the average absorbed part is greatly red~ced and reliability is high. ~or information, the power can be below 20 Watts.
~ fourth feature of the system is the possibility of programming certain of its charac-teristics, such as the pass band, the sensitivity, the duration of the recordings, and the service identifications, which makes it possible to use it for developing the recordings according to the particular needs. This results from the use o~ a conventional programming terminal TP constitu-ted by a portable terminal having the size of a pocket calculator and which can therefore be easily transported. In the same recorder ~P, terminal TP
comprises a central unit 21 whose programmes can evolve. It is connected to digital interface links at ~ and makes it possible to produce all the controls and programming~ whilst permitting a dialogue betwe~n the operator and the recorder ~P as a result of the alphanu~leric dlsplay on ~-terminal TP. Thus, the interfering signal recorder ~P can be designed with a box or case having substantially no manual controls on the front face, which makes it possible to grea-tly cut down costs. The dialogue and programming by the bias of terminal TP are made possible as a result of central unit 6 which, in the read-only memory 13 programmed for this purpose~ can convert the dialogue of the informa-tics type into dialogue which can be e~sily interpreted by a not specially trained operator. ~he ROM 13 i5 the equivalent of a dictionary and can be changed when the language of the opera-tor changes. ~or information purposes it is poin-ted out that the essential cornponents of programming terminal ~P are a series interface 20, central unit 21, a character generator 22, keyboard 23 and a display 24, apart from a power supply 25, which is controlled from power supply 11, which i~ started up by clo~ing contact door 12. ~he latter can also be brought into the closed position by the m~h anlcal locking or engagement of the connection of the programming terminal.
~he disturbance signal recorder ~P can ~e combined with a printer IP consti~tuting the processing circuits ~X, so as to reproduce on paper the elements stored in buffer 5. As shown in ~ig.
2, printer IP can be of any random -type, provided that it can operate both in the graphic mode for plotting curves and in the alphanumeric mode for entering date and other data and provided that it can be remotely started up (i.e. made live by control of recorder ~P). Thus, it is possible to use a thermal 9 electrosensitive, optlcal fibre cathode ray -tube or laser printer and the user can choose as a function of requirements. ~he arrangement does not suf~er ~rom the disadvantage o~ loss of monitoring in the case o~ the paper ending or the printer ~ailing. ~hus, memor~ 5 generally has an adequate capacit~ -to be able to await the arrival o~ the operator, whilst bein~
ready to store any other possible recordings.
Programming termi n~l ~P is sh~ n in dotted line form, because it is normally transported by the ., ~3~
operator and is not involved in the normal ope~ation of the recorder.
~ ig. 3 shows a variant of the preceding combi~a-tion in which several disturbance recorders ~P1, EP2, etc. are combined with a single printer IP by the bias of a connection box ~ serving as a ~ultiplexing circuit, in such a way that dialogue is successively possible with the different recorders EP1, ~P2, etc. connected by their synchronizing inputs/outputs to an external clock ~X .
- The constructions according to Eigs. 2 or 3 involve an operator movlng or replacing the roll of paper. This can be disadvantageous when movements are restricted, so that recorder ~P
according to ~ig. 4 or recorders ~P19 ~P2, etc.
according to ~ig. 5 are connected (across a connecting circ-uit ~ in the latter option) to a magnetic memory or store, whose capacity can be very high, e.gO several thousand seconds. lhis amounts to introducing a third memory in the data chain, namely unit U~, whose capacity is much higher than that of upper memory 5. The user is able to choose the most suitable magnetic memory unlt for his requirements, as a function of the sought capacity and the environmen-tal conditions.
~his is obviously particularly advan-tageous in the case of remote connection concepts, when the ~ management of one or, in general, several interfering signal recorders is centrali~ed. In this case it is necessary to combine with recorder EP a supplementary interface component adapted to the remote connection mode (telephone lines~ high voltage lines, optical fibres, radio links, e-tc.)9 whereby this component can be e.g. a modulator~
demodula-tor in the case of a telephone link. Units UMM can be of t~e flexible disk or magnetic tape type, said two supports being detachable, or it is also possible to use memory units of the fixed disk~
magnetic bubble or other -types. In each o~ -these cases the operator can program~e recorder ~P in such a way that when the memory support is full in magnetic memory unit UMM~ it erases the oldest recordings and replaces -them by more recen-t recordings.
In the arrangements of ~igs. 4 or 5~ which use a magnetic memory unit UMM, a printer IP is indicated by dot-ted lines and it is possible to reproduce on the latter the recording when this is desired by the operator. Printer IP can be carried to the location by the operator at the same time as terminal TP. ~y means of the central unit 6 of recorder ~P or one of them (case of ~ig. 5)? the operator transfers data from the magnetic memory unit UMM to prin-ter IP~ In the described arrangements incorporating one or more recorders ~P, it should be noted that decisions are centralized by the recorder and not by the associated peripheral equipmen-t. As by definition -disturbance is of a random nature, it can intervene during a dialogue or a data transmission. The central uni-t 6 is programmed in such a way that the recording ~unctinn has an absolute priority and the central unit interrupts the link between -the recorder and i-ts peripheral equipment when this is necessary.
It should also be noted that a test of satisfactory operation can be required by cen-tral unit 6 of recorder ~P in connection with the periphe~al e~uipment be~ore or after each use or in a periodic manner, in order to check that the system is ready to operate. This test is received by the recorder in the form of a digital state word and is analyæed by central unit 6 and can lead to the operator being called3 when a fault is detected. ~his call takes place by means of auxiliary circuits ~. The opera-tor then has access to the state word characterizing the fault by using programming terminal TP. ~or information purposes auto-test circuits 30 are shown in the processing part of ~ig. 19 said circuits serving to supply the digital state word corresponding to the satisfactory operation test on interrogation of the central unit 6. Circuits 30 can be designed in per se known manner and reference can be made in this connection to the document "Preliminary OEM Manual for a Eloppy disk controller~published by Scientific Micro Systems 777 East Middlefield Road, Mountain View~ Calif. 94043 - published December 9, 1977' With regards to the magnetic memory unit UMM~ reference can be made e.g. to the document "EX ~01~820 Printers User Manual", published by~AXIOM, April 1979~
~îg. 6 shows a flow char-t of an disturbance signal recording system according to the invention.
The vertical, left-hand diagram relates to the testing and operations of the watching par-t EP~.
Stage 100 corresponds to the initialization of par-t EPV, i.e. to it being made live. ~est s-tage 101 represents the wait from sampling control S3 processed by the central unit or a microprocessor 6. This is follo~ed by the cyclic scrutini~ation or scanning operation 1025 i.e. the sampling of 2~
signals by multiplexer at 2 on periodic control by signal S3. ~he following operation 103 is the orlentation of the digital result S1 of the scrutinization into the pretriggering memory 4~
~he digital data are entered in memory 4 in place of ~he oldest data previously there. ~he oldest data are then either elimin.ated, or transmitted to the buffer m~mory 5, as will be shown hereinafter during the analysis of the diagram ~P~. S-tage 104 corresponds -to control calculations performed by the central unit for making the sampling frequency dependent on the fluctuations of the signal ~requency -to be checked, in such a way that substantially the same samples of the considered signal are selected during the successive cycles thereof. This operation makes it possible to prepare the sampled signals for subsequent processing by compression reserved for the signals resul-ting from interference and therefore, said processing is only performed in working part EP~. Operation 104 results from the programming of central unit 6. ~he result of the control calculations influences the samplin~
frequency given by control signal S3.
~he central diagram relates to the test, and operations of the working part EP~. Initialization in 110 is controlled by signal S7 which releases power supply 11. Stage 111 represents the recording cause test, which can result from distur~ance detection (to 112) or an auto-test control (to 121) or an operator di~logue request (to 125). In the case of disturbance detection9 the corresponding signal is S6 received by central unit 6. Stage 112 is the test controlled by unit 6 of the state of )6;;~
memory 4~ whe~her or not the latter is full. If it is not full, ~illing continues~ If it is full 9 opera-tion 113 consisting of reading the oldest data stored in 4 takes place. Stage 114 is the operation of orienting said data (after processing by possible compression) into mass memory 5. r~est 115 correspond~ to the end of recording in memory 5, i.e. the end of the disturbance to be recorded.
It is possible here to have several dif~erent 1~ operating types and, for e~ch of them, a predetermined recording time as a function of the preprogrammed rules. ~est 116 corresponds to a programmed output to a peripheral device and stage 11l~ in the affirmative, to the transfer operation to a magnetic memory unit UMM or external printer IP. Stage 118 is ~he end of recording.
~ he right-hand diagram sho~s at 120 the tes-t cause of the initialization o~ the ~P~ in the absence of disturbance~. Stage 121 repres~nts the auto-test oper~tion triggered ~y circuit 30 of the processing part. It can also represent a periodic test and automatic operation, programmed.by central unit 6 and initiated by a signal from the time dating device 7~ Fault test 122 means that central unit 6 interprets the test results and determines whether or not there is a fault. In the affirmative, the unit triggers off the alarm operation 123 by circuit 9 to the outside. Stage 124 is~the end of this sequence.
The final stage 125 represents an activation of the EPT ~rom programming term~nal TPt i~e. the operator dialogue operation.
An disturbance signal record-ing system according to thé~ in~ention provides the user with %~
economic means, as a result of lts optimized design~ and modular structure compatible with all conventional informatics means for recording electric signals with random recurrences, such as disturbance occurring in the transmission of electric power. As a result of its digital design it is possible to remotely transmit data and directly process magnetic supports recorded by conventional informatics means. However, its use is not limited to the monitoring of electricity systems. lhe sys-tem can be used in research laborator;es, -the iron and steel industry (e.g.
power supply for furnaces) 7 the medical field (monitoring patients)S computer power supplies, chemical industry, as well as the generation or conversion of energy.
o 1g , .
Claims (10)
1. A disturbance signal recording system comprising a fixed part or disturbance signal recorder installed at the recording point and serving to receive the electric signals to be monitored and to record disturbance a separate complementary part comprising recorded signal processing means and electrical connection means between the two parts, the disturbance signal recorder incorporating in series means for the reception and matching of the incoming signals, analog-digital conversion and multiplexing means, a first or pretriggering memory for producing a delay, and a second memory for recording the disturbance, whilst it also comprises disturbance signal detection means supplied by input signals after matching, a time dating device, management and control circuits having a central unit for checking the conversion and multiplexing circuits and the second memory, as well as the disturbance signal detector, and circuits for generating service signals, together with supply circuits, wherein the second memory is a static memory constituting a buffer between the disturbance signal recorder and the processing part, said supply signals comprising a separate power supply for the buffer and auxiliary circuits for constituting a working part, which is supplied with power in the recording mode, i.e. after detecting disturbance, and the links between the recorder and the processing means are materialized by digital circuit interfaces, said links being in digital form in accordance with a standardized informatics procedure.
2. A system according to claim 1, wherein it also comprises programming dialogue means with the recorder, said means being detachable and constituted by a programming terminal having programming and display means, as well as means for connecting to the digital interfaces of the recorder.
3. A system according to claim 2, wherein the working part of the disturbance signal recorder also comprises a read-only memory for operating in conjunction with the programming terminal across the central unit,
4. A system according to claim 3, wherein the central unit is included in the working part of the recorder, which incorporates a second central unit in the watching part, which is continuously live, in such a way as to control and synchronize the analog-digital conversion and multiplexing circuits, as well as the disturbance detection circuits.
5. A system according to claim 1 wherein the processing means are constituted by a printer on paper operating on the basis of digital data and permitting entries in the graphic mode and in the alphanumeric mode.
6. A system according to claim 5, wherein it comprises a plurality of disturbance signal recorders connected across a connecting and multiplexing box or case to the said printer and synchronized with one another or on the basis of a common external clock.
7. A system according to claim 1, wherein the processing means comprise a magnetic memory unit for a large capacity storage of data previously stored in the buffer memory of the recorder.
8. A system according to claim 7, wherein the processing means also comprise a printer on paper operating on the basis of digital data and permitting entries in the graphic mode and in the alphanumeric mode.
9. A system according to claim 8, wherein it comprises a plurality of interfering signal recorders connected across a connecting and multiplexing box or case to the magnetic memory unit and to the printer.
10. A system according to anyone of claims 1 to 3, wherein it comprises an emergency power supply for the time dating device, said supply being constituted by an accumulator charged by the supply circuits.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8113977A FR2509936B1 (en) | 1981-07-17 | 1981-07-17 | DISTURBANCE RECORDING SYSTEM |
| FR8113977 | 1981-07-17 |
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| Publication Number | Publication Date |
|---|---|
| CA1189624A true CA1189624A (en) | 1985-06-25 |
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ID=9260618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000407112A Expired CA1189624A (en) | 1981-07-17 | 1982-07-12 | Disturbance signal recording system |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4553223A (en) |
| EP (1) | EP0072270B1 (en) |
| JP (1) | JPS5824994A (en) |
| KR (1) | KR900001138B1 (en) |
| CA (1) | CA1189624A (en) |
| DE (1) | DE3270245D1 (en) |
| ES (1) | ES514002A0 (en) |
| FR (1) | FR2509936B1 (en) |
| IN (1) | IN158653B (en) |
| PT (1) | PT75258B (en) |
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| US4417306A (en) * | 1980-01-23 | 1983-11-22 | Medtronic, Inc. | Apparatus for monitoring and storing utilizing a data processor |
| US4361877A (en) * | 1980-02-05 | 1982-11-30 | Sangamo Weston, Inc. | Billing recorder with non-volatile solid state memory |
| US4375663A (en) * | 1980-03-31 | 1983-03-01 | Leeds & Northrup Company | Power failure early warning circuit for microprocessor with CMOS RAM memory |
| US4356475A (en) * | 1980-09-12 | 1982-10-26 | Siemens Aktiengesellschaft | System containing a predetermined number of monitoring devices and at least one central station |
| US4399513A (en) * | 1980-10-08 | 1983-08-16 | Ird Mechanalysis, Inc. | Machine monitoring system and apparatus |
| US4388706A (en) * | 1980-12-01 | 1983-06-14 | General Electric Company | Memory protection arrangement |
-
1981
- 1981-07-17 FR FR8113977A patent/FR2509936B1/en not_active Expired
-
1982
- 1982-06-30 IN IN491/DEL/82A patent/IN158653B/en unknown
- 1982-07-06 EP EP82401275A patent/EP0072270B1/en not_active Expired
- 1982-07-06 US US06/395,313 patent/US4553223A/en not_active Expired - Fee Related
- 1982-07-06 DE DE8282401275T patent/DE3270245D1/en not_active Expired
- 1982-07-12 CA CA000407112A patent/CA1189624A/en not_active Expired
- 1982-07-15 ES ES514002A patent/ES514002A0/en active Granted
- 1982-07-15 PT PT75258A patent/PT75258B/en not_active IP Right Cessation
- 1982-07-15 JP JP57123726A patent/JPS5824994A/en active Granted
- 1982-07-16 KR KR8203185A patent/KR900001138B1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| PT75258B (en) | 1984-05-29 |
| JPS5824994A (en) | 1983-02-15 |
| KR840000860A (en) | 1984-02-27 |
| US4553223A (en) | 1985-11-12 |
| FR2509936A1 (en) | 1983-01-21 |
| DE3270245D1 (en) | 1986-05-07 |
| EP0072270B1 (en) | 1986-04-02 |
| ES8305545A1 (en) | 1983-04-01 |
| PT75258A (en) | 1982-08-01 |
| JPH0256718B2 (en) | 1990-11-30 |
| EP0072270A1 (en) | 1983-02-16 |
| FR2509936B1 (en) | 1986-12-19 |
| ES514002A0 (en) | 1983-04-01 |
| IN158653B (en) | 1986-12-27 |
| KR900001138B1 (en) | 1990-02-27 |
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| MKEC | Expiry (correction) | ||
| MKEX | Expiry |