CN1739031A - Position detector - Google Patents
Position detector Download PDFInfo
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- CN1739031A CN1739031A CN200380108696.XA CN200380108696A CN1739031A CN 1739031 A CN1739031 A CN 1739031A CN 200380108696 A CN200380108696 A CN 200380108696A CN 1739031 A CN1739031 A CN 1739031A
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- 230000005291 magnetic effect Effects 0.000 claims abstract description 37
- 230000015654 memory Effects 0.000 claims abstract description 6
- 230000005294 ferromagnetic effect Effects 0.000 claims description 58
- 230000001939 inductive effect Effects 0.000 claims description 24
- 230000005417 remagnetization Effects 0.000 claims description 20
- 230000004907 flux Effects 0.000 claims description 16
- 238000011156 evaluation Methods 0.000 claims description 13
- 230000001960 triggered effect Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 208000023414 familial retinal arterial macroaneurysm Diseases 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 9
- 230000005381 magnetic domain Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
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- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
- G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
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- 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
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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- 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
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
- G01D5/2033—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils controlling the saturation of a magnetic circuit by means of a movable element, e.g. a magnet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/4815—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals using a pulse wire sensor, e.g. Wiegand wire
Abstract
The invention pertains to a position detector which, in its simplest form of embodiment, has two induction coils but only one individual pulse wire. All information required, for example for a count, is simultaneously available from the triggering direction of the magnetic reversal and the magnetic reversal direction of the pulse wire, together with the last established and stored position and polarity. One such position detector operates using memory elements having low energy requirements, such as FRAMs, and also without external energy. In order to be able to use one such position detector even at high temperatures, it can also be fitted with an EEPROM.
Description
The present invention relates to a kind of position detector by using ferromagnetic element to detect translation motion and/or rotatablely move.
Such ferromagnetic element can be the form of the taps motion detector described in the US 4363013, also can be the form of the Wiegand sensor described in DE 4107847C1 and DE 2817169 C2.Under above-mentioned these situations, for example, the taps of ferromagnetic material by cell winding institute around.Magnetic regions in the described ferromagnetic material--is also referred to as magnetic domain or " Weiss " zone--and begins most with the random fashion orientation, but under the effect of external force, these magnetic regions may be directed in the single domain (single domain).When applying an external magnetic field with specific direction and intensity, this zone will swing to immediately or " upset " (flips).So, in described cell winding, will produce a potential pulse that can be used as output signal.
In the design of known a kind of angular sensor (referring to as EP 0724712B1), the conversion and replacement magnet will conduct these tapss, some of them magnet will be distributed in circumference around, like this, opposite polarity magnetic field penetrates each taps in succession.The result who all magnetic domains of each taps is carried out remagnetization is to generate the potential pulse that one-period, amplitude and polarity are determined in described cell winding.The electronic counting circuit is assessed these potential pulses.The magnetic field that described replacement magnet is opposite with polarization, this magnetic field returns to virgin state with the magnetic domain of taps, so that the taps of being considered is ready to trigger new pulse.This operator scheme is known as " asymmetric ".Under symmetric pattern, in described reset process, also produced pulse that can be evaluated.
As described in EP 0724712 B1 that mentions in front, need will at least two above-mentioned sensors along direction of motion be distributed in circumference around, not only can determine the each complete rotation of turning axle like this, can also be under the situation of considering distinguishing alternate position spike between setting up procedure and the reset process, determine the direction of rotation, wherein the potential pulse that is produced can be uniquely corresponding to the respective angles position of turning axle.
Since need will at least two sensors be distributed in circumference around, and the taps sensor needs definite size, therefore creates such system and bothers very much.This means, realize that the revolution meter of a minor diameter is impossible.And these sensors are also quite expensive.
The known position detector that also can use the above-mentioned type that only comprises a sensor is determined the rotation and the sense of rotation thereof of turning axle.In this case, sensor is designed to the Wiegand line, has a certain degree between the moving direction of described Wiegand line and described turning axle part, and facing to the Wiegand line a definite magnetic pole is arranged; Like this, described Wiegand line just can produce the pulse (contrasting above-mentioned DE2817169 C2) with directional correlation.
The shortcoming of this structure is, though can identify the direction of rotation, predetermined polarization means and can only detect by the predetermined sense of rotation of described polarization.That is to say, only can determine a sense of rotation.
Therefore in order to determine two sense of rotation of turning axle, need at least two such sensors and corresponding evaluation circuits thereof.In addition, because the angle between direction of motion and the sensor orientation plays conclusive effect, therefore under some certain conditions, this structure has the low-down shortcoming of energy output.Thereby such structure is not having will to be difficult to work under the situation of extra power.
The object of the present invention is to provide a kind of correction to above-mentioned solution.
Because in ferromagnetic material, the reciprocation with magnetic moment between the adjacent atom of different direction of magnetization is very strong, and therefore described magnetic moment aligns mutually in less area of space in promptly so-called Weiss the zone in.These zones are separate by the transition bed that is called " Bloch wall ".The permanent single domain that has been found that the direction of magnetization unanimity can obtain by for example method of machinery expansion ferromagnetic wires.When such magnetic domain was introduced in the external magnetic field with definite field intensity and direction, this magnetic domain can whole not reversed; On the contrary, its elementary magnet begins from the reference position counter-rotating of determining---preferably the end from described ferromagnetic wires begins counter-rotating---and this counter-rotating will go in the domino mode along the direction towards the external magnetic field.Though the backward wave that imports to by this way in the ferromagnetic element has limited speed, this speed is enough to compare with the speed of exciting magnet, therefore we can say that this magnetic domain is " instantaneous upset ".
By utilizing above-mentioned physical relation, for this type of position detector that comprises at least one exciting magnet of here being discussed, according to the present invention, by using a kind of position detector to solve above-mentioned task, this position monitor has single ferromagnetic element, at least one inductive coil and at least one and is used for determining additional sensor element about the information of the polarity of exciting magnet and position, and wherein obtainable message block is exactly the required full detail of direction of motion that is used for determining exciting magnet when triggering described single ferromagnetic element.
In a very simple modification of the present invention, utilize the Bloch wall effect of passing ferromagnetic element, can detect the position of described exciting magnet by determining the triggering direction of ferromagnetic element remagnetization.This remagnetization can begin on any one surface from two end surface of this element.
But the triggering direction of described remagnetization should not obscured mutually with the direction of described remagnetization self, the magnetic pole that the direction of described remagnetization self can will " be overturn " by the Weiss zone or describe from the magnetic pole of this magnetic pole " upset ".In this case, described remagnetization direction has and makes the zone effect of being discussed identical with the triggering pole polarity of exciting magnet.
When elementary magnet was turned on the direction of external magnetic field with the form of continuous turning axle, the kinetic energy that described elementary magnet produced will be even as big as from corresponding to the coil picked up signal pulse of described ferromagnetic element required electric energy and counting circuit and the required energy of Hall element.
In case known position and polarity that exciting magnet EM is current, just can consider they and the position of storage recently and the relation between the polarity number.This relation provides definite exciting magnet EM and the full detail required with the direction of motion of its turning axle that forever is connected.
In order more to be expressly understood the present invention, be that the basis describes below with the revolution meter.
With an exciting magnet and the rotation half-turn resolution be feature generally, described revolution meter system can describe by four basic status of exciting magnet fully, these states can make up by various forms, that is: in conjunction with the magnet data of up-to-date storage
Z1.) arctic on reference line right side,
Z2.) arctic in reference line left side,
Z3.) South Pole on reference line right side, and
Z4.) South Pole in reference line left side.
According to the present invention, when only using a taps and an inductive coil, these four kinds of states can make up in several ways mutually, to form the combination of three groups, every group two states.The combination that is occurred in actual conditions will depend on the direction that described remagnetization is triggered.
First group: two that have defined remagnetization are triggered direction; Referring to Fig. 1,2 and 3.
A.) South Pole (Z1 or Z4) in the arctic on reference line L right side or reference line L left side;
B.) arctic in reference line L left side or the South Pole (Z2 or Z3) on reference line L right side.
Here, the position of exciting magnet EM can be by using other sensor element, and for example second inductive coil or Hall element are measured the direction that remagnetization is triggered and determined.When the second coil SP2 is provided, directly finish described measurement on ferromagnetic element FE.And when using Hall element HS, carry out described measurement indirectly.When using Hall element HS, the polarity of the exciting magnet EM that is detected is incoherent (irrelevant).Only importantly whether this exciting magnet is energized.Measure the remagnetization direction by inductive coil SP1 or the SP that uses ferromagnetic element FE, always can from the polarity of potential pulse, draw the polarity of exciting magnet EM.
Second group: one that has only defined remagnetization is triggered direction; Referring to Fig. 4.
A.) arctic (Z1 or Z2) in the arctic on reference line L right side or reference line L left side;
B.) South Pole (Z3 or Z4) in the South Pole on reference line L right side or reference line L left side.
In this case, Hall element always can be passed through in the position of exciting magnet EM, promptly by judging that the mode whether exciting magnet be energized directly determines.The polarity of exciting magnet EM can determine independently by using inductive coil SP to measure the remagnetization direction.
The 3rd group: undefined remagnetization triggers direction; With reference to figure 5.
A.) the top-right arctic of reference line L or the bottom-right South Pole of reference line L (Z1 or Z2);
B.) the bottom-right arctic of reference line L or the top-right South Pole of reference line L (Z4 or Z3).
Relevant polarity is analyzed as the function of the position of Hall element HS, and promptly described position is (as shown in Figure 5) or left side on the right side.Here the polarity of exciting magnet EM can directly provide by Hall element HS.Now the position of exciting magnet EM (above or below the arctic or the South Pole) can be determined indirectly by measuring the remagnetization direction.
Above-mentioned all solutions are of equal value on mathematics, and have identical commercial value.
Can realize having the imaginabale position detector of simple and mechanical design by above-mentioned creative scheme, this position detector only comprises a ferromagnetic element, this ferromagnetic element can be to be approximately zero speed, even after normal power supply breaks down, be operated on two direction of motion of exciting magnet with meeting the requirements.The significant advantage of this position detector is, determines that the required full detail of the polarity of exciting magnet EM and moving direction can be at moment Ts, and promptly moment of being triggered of ferromagnetic element FE obtains.Therefore, except the data of being stored, all essential signals all appear on the outlet terminal of the inductive coil considered and/or Hall element.In order to realize this goal, ferromagnetic element FE, Hall element HS, and one or more exciting magnet EM must in a very special spatial framework, arrange mutually, for example be arranged on the position.
Position detector with simplified design of this optimization also can obtain the energy that is used for the energy of output signal and is used for evaluation circuits from inductive coil SP or inductive coil SP1, SP2, and described evaluation circuits comprises at least one counting assembly, nonvolatile memory, and electric capacity.
Supplementary features of the present invention can obtain from dependent claims.
To describe the present invention based on five exemplary embodiment below, these embodiment will show more or less in the accompanying drawings.
-Fig. 1 has shown the design concept figure according to position detector of the present invention, and described position detector has a ferromagnetic element, two corresponding inductive coils, and two ferromagnet magnetic fluxs conduction parts;
-Fig. 2 has shown the design concept figure according to the described position detector of second example embodiment of the present invention, and described position detector has a ferromagnetic element, inductive coil, Hall element, and two ferromagnet magnetic fluxs conduction parts;
-Fig. 3 has shown the schematic diagram according to the described position detector of the 3rd example embodiment of the present invention, and described position detector has a ferromagnetic element, inductive coil, Hall element, a plurality of exciting magnet, and two ferromagnet magnetic fluxs conduction parts;
-Fig. 4 has shown the schematic diagram according to the described position detector of the 4th example embodiment of the present invention, and described position detector has a ferromagnetic element, an inductive coil and a Hall element;
-Fig. 5 has shown the schematic diagram according to the described position detector of the 5th example embodiment of the present invention, described position detector have a ferromagnetic element, inductive coil, Hall element, and two intersect the ferromagnet magnetic fluxs conduction parts of placing each other in 180 degree;
-Fig. 6 has shown the circuit block diagram of the evaluation circuits that is applicable to Fig. 1-5 illustrated embodiment;
-Fig. 7 has shown the structure corresponding to position detector shown in Figure 5, and wherein the turning axle of exciting magnet has rotated 90 degree, that is to say, as the set angle of Fig. 4; And
-Fig. 8 has shown the structure corresponding to position detector shown in Figure 7, and wherein the turning axle of exciting magnet has rotated 90 degree with respect to position shown in Figure 5, for the sake of clarity, two exciting magnets has been shown among Fig. 8.
In the embodiment of as shown in Figure 1 position detector, moving person is a turning axle 10, and this turning axle can be along the rotation of the direction shown in arrow R1 and the R2, along clockwise direction or rotation in the counterclockwise direction promptly.In order to count, provide the exciting magnet EM that has arctic N and South Pole S to the rotation of axle 10.By ferromagnet magnetic flux conduction part FL1 and FL2, ferromagnetic element FE can be subjected to the influence in the magnetic field that produced by exciting magnet EM.The end 14 and 15 of magnetic flux conductive part is positioned on the described circular arc of path (path) by exciting magnet EM, and end 16 (left side at reference line L is arranged on the FE) and end 17 (right side at reference line L is arranged on the FE) is towards the end face of ferromagnetic element FE.
The ferromagnetic element FE that is parallel to exciting magnet direction of motion by two cell winding SP1 and SP2 institute around.When exciting magnet EM moved through ferromagnetic element FE, it was the described ferromagnetic element of remagnetize, and produced the potential pulse of corresponding polarity thus.These pulses can extract from the output terminal 22 and 23 of these two coils.Here second inductive coil SP2 will be used for the direction of determining that described remagnetize is triggered as an additional sensor element.Time migration between the voltage max that can export from two coils draws the direction that described remagnetize is triggered, thereby obtains the position of exciting magnet.Strictly speaking, a needs assessment is in the coil of logic state " 1 ", and promptly first arrives the coil of its voltage max.This moment, another coil did not also reach its maximal value, therefore was regarded as being in logic state " 0 ".Here with a taps as ferromagnetic element.
In described embodiment, has identical Reference numeral with the corresponding element of Fig. 1 according to Fig. 2.
Opposite with Fig. 1, for ferromagnetic element FE has only distributed a cell winding SP.In order when exciting magnet passes through described ferromagnetic element, to determine the position of described exciting magnet, provide a Hall element HS as additional sensor element here, there is or do not exist the signal that can extract at its output terminal 24.Identical with situation shown in Figure 1, the polarity of ferromagnetic element FE is determined by the coil SP of ferromagnetic element FE.And the polarity of determining by Hall element with the assessment that will carry out is had nothing to do, but can be used as the redundant information that is used for the watch-dog working condition.
Therefore, determine that in moment Ts being used for of obtaining the polarity of exciting magnet and the complete information group of direction of motion comprise: signal that be stored in the data of nonvolatile memory, obtains at the output of described inductive coil or the signal that obtains at the output of the output terminal of inductive coil and Hall element.
In the embodiment of position detector shown in Figure 3, described position detector has and the corresponding element of previously described one exemplary embodiment, in addition, in order to improve resolution, four exciting magnet EM1-EM4 placed apart with 90 degree and have alter polarity also on turning axle 10, are provided.Thus, when turning axle 10 rotation, at first be the arctic, be the South Pole then, successively via magnetic flux conductive part FL1 and FL2 each end face by ferromagnetic element FE., determine that the required Hall element in exciting magnet position is assigned to the end of exciting magnet EM1-EM4 here, and back to the ferromagnetic element direction.
In the embodiment of position detector shown in Figure 4, described position detector has with the front describes the embodiment components identical, but does not occur ferromagnet magnetic flux conduction part in the present embodiment.In this modification, mainly utilized this situation that just has been triggered at exciting magnet EM and ferromagnetic element FE before ferromagnetic element FE aligns.Expand near reference line L by sensing range, can calculate the sensing range that is used for the required Hall element HS in definite exciting magnet EM position Hall element HS.
In the embodiment of position detector shown in Figure 5, described position detector also has with the front describes the embodiment components identical, but in the present embodiment, spends the setting that is separated from each other facing to the magnetic flux conductive part FL1 of exciting magnet and the end of FL2 with 180.Here, determine that the required Hall element as the aiding sensors element of exciting magnet polarity meets at right angles with respect to reference line L and pass the rotation center of turning axle 10, and be provided with in the following manner: when ferromagnetic element was triggered, it still can sense the corresponding polarity of exciting magnet EM.This situation often occurs in before described polarity and the magnetic flux conductive part registration, specific angle [alpha] place.The position of exciting magnet EM is determined by the coil of the ferromagnetic element FE that measures the remagnetization direction.Can come work with very little exciting magnet EM according to current modification shown in Figure 5, particularly when required magnetic flux conductive device is used to retrain magnetic flux with the form of magnetic lens.
In the example embodiment shown in Fig. 1-5, exciting magnet EM and ferromagnetic element FE are positioned at the same plane with respect to turning axle.Certainly, ferromagnetic element FE and exciting magnet EM also can be positioned at different plane-as shown in Figure 7-or on same plane but be parallel to turning axle-as shown in Figure 8, and this under specific circumstances even may be useful.
The energy that is used for evaluation circuits comes from the signal that inductive coil SP, SP1 and SP2 are sent usually.If only used an inductive coil SP, the energy of Hall element is also provided by this coil so.
Connecting line 41 is the parts that are used for the power supply of evaluation circuits noted earlier.Data can be read via tap 39 and interface 40.Line 42 (if any) is used for obtaining energy from the external world, particularly when also using EEPROM except using FRAM when.EEPROM can make evaluation circuits work under very high temperature usually, and under such temperature, configuration data stored can be lost in very short time among the FRAM.
The common ground of all one exemplary embodiment described above is, can only accurately determine the rotation of turning axle 10 and/or the direction of rotation by an independent electromagnetic component, for example described electromagnetic component is a taps, and it can also provide enough available energy for evaluation circuits and as the Hall element of additional sensor element.In the simplest creative modification structures of taps circuit, the two ends of taps are of equal value aspect measuring technique, and the potential pulse that is produced comprises about the position of triggering exciting magnet and the information of polarity.
The another one main points are, all about the triggering polarity of the triggering direction of ferromagnetic element remagnetization, exciting magnet EM, and the exciting magnet of up-to-date storage with respect to the information of the polarity of turning axle and position can the triggering of ferromagnetic element constantly Ts obtain, that is to say, in the response time of selected element scope, obtain simultaneously.
Capacitor C in the evaluation circuits is used for storing the power supply energy that obtains from signal pulse always, and is evaluated until signal at least, and Counter Value is stored in the non-volatile memory device.
Can also use the ferromagnetic element of other types to replace described taps or Wiegand line, as long as can satisfy the condition of overturning immediately in the Weiss zone.
For fear of misunderstanding, be noted that under the situation of having ignored spuious zone (stray field) ferromagnetic element FE is characterised in that only have a magnetic input and a magnetic output.Though can imagine, may have the interruption of the parallel and/or serial of any amount between input and output, these interrupt not deviating from the inventive concept set forth that the present invention uses single element.
Also can use other sensor,, replace described Hall element, determine the polarity or the position of exciting magnet as field plate (field plates).Can also prepare described exciting magnet by following mode, make its position and/or polarity to determine by capacitive measurement rather than Hall element.The accurate angular sensor of position detector described above with so-called " multiturn " form can be used in combination, for example described in EP 0658745, reach show such.In this case, reference line L is corresponding to the null position of employed accurate angular sensor.
For example, when using the Wiegand line,, need obtain the precise information of the magnetized state of ferromagnetic element FE for synchronous with accurate angular sensor.In order to realize this purpose, the applicable structure that has two coils as shown in Figure 1.By for a coil in the described coil provides foreign current, for example for coil SP1 provides foreign current, can be at second coil, for example trigger voltage pulse among the coil SP2 is as the magnetized function of ferromagnetic element.When one of these two coil are folded a placement, also can realize above-mentioned identical process.Can also trigger a potential pulse with a short current impulse or the slowly linear electric current that rises, but only need a coil SP in this case.
Reference numerals list
10 rotating shafts
14 ends
15 ends
16 ends
17 ends
22 outputs
23 outputs
24 output terminals
30 evaluation circuits
32 input ends
33 input ends
34 identification circuits
35 identification circuits
36 nonvolatile memories
38 counters
39 taps
40 interfaces
41 connecting lines
42 lines
The α trigger angle
C electric capacity
The D rectifier
The EM exciting magnet
The EM1 exciting magnet
The EM2 exciting magnet
The EM3 exciting magnet
The EM4 exciting magnet
The FE ferromagnetic element
FL1 magnetic flux conductive part
FL2 magnetic flux conductive part
The HS Hall element
The L reference line
The N arctic
The R1 arrow
The R2 arrow
The S South Pole
The SP cell winding
The SP1 cell winding
The SP2 cell winding
SE additional sensor element
The moment that Ts ferromagnetic element FE is triggered
Z1 exciting magnet basic status
Z2 exciting magnet basic status
Z3 exciting magnet basic status
Z4 exciting magnet basic status
Claims (13)
1, is used to the position detector that detects translation and/or rotatablely move, having at least one exciting magnet (EM), an only unique ferromagnetic element (FE), at least one inductive coil (SP or SP1) and at least one is used for determining determining wherein that about the additional sensor element (SE) of the information of the polarity of exciting magnet (EM) and position the required full detail of direction of motion of exciting magnet (EM) can obtain in the moment (Ts) that only ferromagnetic element (FE) is triggered.
2, position detector as claimed in claim 1 is characterized in that, described ferromagnetic element is a taps.
3, as claim 1 and 2 described position detectors, it is characterized in that, described inductive coil (SP or SP1) is used to measure the remagnetization direction, and the direction that is triggered by the remagnetization that is used for determining ferromagnetic element (FE) in conjunction with described additional sensor element (SE).
4, as each described position detector in the claim 1 to 3, it is characterized in that, described additional sensor element (SE) is another inductive coil (SP2) that is positioned on the ferromagnetic element (FE), and this coil is used for determining the direction that the remagnetization of ferromagnetic element (FE) is triggered.
As each described position detector in the claim 1 to 3, it is characterized in that 5, described additional sensor element (SE) is the Hall element (HS) that is used to measure the polarity of described exciting magnet (EM) or determines its position.
6, as each described position detector in the claim 1 to 5, it is characterized in that, determine that in moment Ts being used for of obtaining the polarity of exciting magnet (EM) and the message block of direction of motion comprise: the data of nonvolatile memory and at inductive coil (SP1, SP2) signal that output terminal (22,23) is located to obtain or the signal of locating and locating to obtain at the output terminal (24) of Hall element (HS) at the output terminal (22) of inductive coil (SP).
As each described position detector in the claim 1 to 6, it is characterized in that 7, the axle of described ferromagnetic element (FE) is parallel to the direction of motion of exciting magnet (EM).
As each described position detector in the claim 1 to 6, it is characterized in that 8, the axle of described ferromagnetic element (FE) is perpendicular to the direction of motion of exciting magnet (EM).
As each described position detector in the claim 1 to 8, it is characterized in that 9, at least one is used to guide and/or the ferromagnet magnetic flux conduction part (FL1 and/or FL2) that retrains magnetic flux is assigned to ferromagnetic element (FE).
10, as each described position detector in the claim 1 to 9, it is characterized in that, be used for evaluation circuits (30) the energy supply can (SP, SP1 SP2) obtain in the signal that is sent from the inductive coil that is used for detection position and/or polarity.
As each described position detector in the claim 1 to 10, it is characterized in that 11, described evaluation circuits (30) comprises at least one counter (38), Nonvolatile memery unit (36) and capacitor (C).
As each described position detector in the claim 1 to 11, it is characterized in that 12, described Nonvolatile memery unit (36) is FRAM and or EEPROM unit.
13, as the described position detector of the one or more claims in front, it is characterized in that, a coil in the described coil (SP/SP1) can be by the current impulse power supply of outside, and the effect of this current impulse is the bias voltage of initialization ferromagnetic element (FE) or keeps this bias voltage.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10254231.7 | 2002-11-20 | ||
| DE10254231 | 2002-11-20 | ||
| DE10259223.3 | 2002-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1739031A true CN1739031A (en) | 2006-02-22 |
| CN100468059C CN100468059C (en) | 2009-03-11 |
Family
ID=30128886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200380108696XA Expired - Lifetime CN100468059C (en) | 2002-11-20 | 2003-11-19 | Position detector |
Country Status (6)
| Country | Link |
|---|---|
| JP (2) | JP4712390B2 (en) |
| CN (1) | CN100468059C (en) |
| AT (1) | ATE466287T1 (en) |
| DE (2) | DE10259223B3 (en) |
| ES (1) | ES2341539T3 (en) |
| IL (1) | IL168712A (en) |
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-
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- 2003-11-19 JP JP2004552653A patent/JP4712390B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9631948B2 (en) | 2012-04-15 | 2017-04-25 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Method and arrangement for synchronizing a segment counter with a fine position sensor |
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| CN105190253A (en) * | 2013-02-26 | 2015-12-23 | 亨斯特勒有限公司 | Battery-less signal transmitter with wiegand sensor for gas or water meters |
| CN105190253B (en) * | 2013-02-26 | 2018-10-09 | 亨斯特勒有限公司 | For gas meter, flow meter or water meter with Wiegand sensor without battery type signal generator |
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| US10488226B2 (en) | 2016-01-20 | 2019-11-26 | Omron Corporation | Proximity sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006523822A (en) | 2006-10-19 |
| ATE466287T1 (en) | 2010-05-15 |
| DE10259223B3 (en) | 2004-02-12 |
| ES2341539T3 (en) | 2010-06-22 |
| JP4712390B2 (en) | 2011-06-29 |
| IL168712A (en) | 2010-11-30 |
| CN100468059C (en) | 2009-03-11 |
| DE50312672D1 (en) | 2010-06-10 |
| JP2011059130A (en) | 2011-03-24 |
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