CN103362501A - Integral decoding method and device of drilling fluid wireless log tool while drilling - Google Patents
Integral decoding method and device of drilling fluid wireless log tool while drilling Download PDFInfo
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Abstract
The invention discloses an integral decoding method and device of a drilling fluid wireless log tool while drilling. The integral decoding method includes the steps of collecting and obtaining original waveforms, preprocessing the obtained original waveforms, integrating the preprocessed waveforms, comparing the integral value with a set threshold value, confirming that the integral value is actual data and outputting the result if the integral value is larger that the set threshold value, confirming that the integral value is interference data and outputting the result if the integral value is not larger than the set threshold, outputting irregular original waves, and obtaining square waves. By means of the integral decoding method and device of the drilling fluid wireless log tool while drilling, the accuracy of wave detection is improved to a large extent, and the intensity of manual judgment is reduced.
Description
Technical field
The present invention relates to a kind of Integral Solution code method and device of drilling fluid wireless drilling instrument.
Background technology
Oil field drilling horizontal well or inclined shaft need to have the wireless drilling instrument to be its guiding.Drilling fluid wireless drilling instrument, data are transmitted in the variation of the compression wave by drilling fluid, because the drilling hydraulic Reeb in the drilling process is subjected to the impact of several factors, interference ratio is more, for telling actual signal, need to adopt the hardware and software wave filter, eliminate and disturb, also will restore actual signal by certain method or means simultaneously.
Main two kinds of existing technology, a kind of is to judge according to amplitude; A kind of is to see width after amplitude reaches again, and after amplitude reached, too narrow also being considered as of width disturbed.But no matter that is a kind of, and the situation that all has Lou code or error code occurs.
In real work, according to encoding law, can differentiate True Data by naked eyes, therefrom find, be disturbed impact, true waveform both may be high and narrow waveform also may be low and wide waveform, and total energy (area) is close.
Summary of the invention
The objective of the invention is provides a kind of Integral Solution code method and device of drilling fluid wireless drilling instrument for overcoming above-mentioned the deficiencies in the prior art, can accurately decode the Effective Raise decoding capability.
For achieving the above object, the present invention adopts following technical proposals:
A kind of Integral Solution code method of drilling fluid wireless drilling instrument, carry out after pretreatment integration with gathering the original waveform that obtains, and with integrated value and setting threshold comparison, this integrated value is greater than setting threshold, then be judged to be True Data and output, otherwise, be judged to be and disturb and output, thereby irregular original ripple output is obtained square wave; Wherein, preliminary treatment comprises the bandpass filtering step, the reference pulse cycle is T, the logical scope of the band of bandpass filtering is Ti＜T＜Tf＜2T, Ti is for allowing the cycle lower limit by bandpass filtering, Tf is for allowing the cycle upper limit by bandpass filtering, and statistics pressure is higher than the continuous data group length H of base pressure Pbase; H＜Ti, then demarcating is no pulse; Ti＜H＜Tf then enters integration and follows filter step, and integrated value for pulse is arranged, and is adjusted next constantly base pressure and basis pulses integrated intensity of data greater than the demarcation of basis pulses integrated intensity automatically; H＞Tf then enters continuous crest integration detection step, and integrated value for pulse is arranged, and is utilized the continuous impulse signal of the integrated intensity differentiation phase mutual interference of crest greater than the demarcation of interim basis pulses integrated intensity.
Described pretreated concrete steps are as follows:
1) original ripple complement code: gather the drilling hydraulic force signal, and initial data is carried out original ripple complement code, polishing incomplete data group, filtering incomplete data group, the data group that unusually increases or reduce namely get quasi-continuous actual pressure data group, enter step 2);
2) pulse is recoded: convert the data group unification after the original ripple complement code to positive pulse, enter step 3);
3) base pressure filtering: for the data group that is lower than base pressure Pbase, directly demarcating is no pulse; Data group for being higher than base pressure Pbase enters step 4);
4) bandpass filtering step: the reference pulse cycle is T, and the logical scope of the band of bandpass filtering is Ti＜T＜Tf＜2T, and statistics pressure is higher than the continuous data group length H of base pressure Pbase; H＜Ti, then demarcating is no pulse, extracts next constantly data, returns step 3); Ti＜H＜Tf then enters integration and follows filter step, automatically adjusts next constantly base pressure and basis pulses integrated intensity of data; H＞Tf then enters continuous crest integration detection step, utilizes the continuous impulse signal of the integrated intensity differentiation phase mutual interference of crest.
In the described step 4), integration is followed filter step and is:
Through the data that bandpass filtering is sent here, respectively choose the time of T/2 from the center time point front and back, compare the minimum pressure Pmin in this section time period, the pressure data Pn in the reference pulse cycle T is carried out integration, be designated as
M and basis pulses integrated intensity Mbase are compared; M＜Mbase, then demarcating is no pulse, extracts next constantly data, returns step 3); M＞Mbase, then being judged to be a pulse signal enters, actual carrier pressure when Pmin is the pulse signal generation, M is the actual strength of pulse signal in this cycle, reset basis pulses integrated intensity Mbase '=M*a, a is basic integration passing ratio, base pressure Pbase '=Pmin*b, b is the base pressure passing ratio, and the Mbase ' after will resetting and Pbase ' are updated to next constantly base pressure and basis pulses integrated intensity of data, then extract next constantly data, return step 3); Wherein, A represents the time ordinal number of the start time that the integration of doubtful pulse signal begins, A=(Q+L)/2-T/2, B represents the time ordinal number of the end time that the integration of doubtful pulse signal stops, B=(Q+L)/2+T/2-1, Q represents to be higher than the time ordinal number that base pressure continuous data group finishes, and L represents to be higher than the time ordinal number that base pressure continuous data group begins.
In the described step 4), crest integration detection step is continuously:
Interim raising base pressure Pbase is interim base pressure Ptemporary, length and the T that will be higher than the time period of Ptemporary compare, less than T, then be judged to be doubtful pulse crest, find the mid point of this crest, according to default temporary period width Ttemporary, determine the sampling scope, choose the pressure minimum value Pmin ' in the Ttemporary time period, pressure data Pn ' is carried out integration, be designated as
M '＜interim basis pulses integrated intensity Mtemporary, then demarcating is no pulse; M '＞Mtemporary then is judged to be a pulse signal and enters, and the starting point of definite pulse signal and terminal point; To remaining pulse signal of this period, again get back to this process and proceed to judge, until should all projections in the time period judge completely, then extract next constantly data, return step 3); Greater than T, then be judged to be Ptemporary inadequate with respect to the increase rate of Pbase, continuing to improve interim base pressure Ptemporary is Ptemporary ', until the duration of the bossing that is detected (length that is higher than the time period of interim base pressure) is less than T; Wherein, the time ordinal number of the start time that the integration of the doubtful pulse signal of A ' expression begins, A '=(W+R)/2-Ttemporary/2, the time ordinal number of the end time that the integration of the doubtful pulse signal of B ' expression stops, B '=(W+R)/2+Ttemporary/2-1, W represents to be higher than the time ordinal number that interim base pressure continuous data group begins, and R represents to be higher than the time ordinal number that interim base pressure continuous data group finishes.
A kind of integration decoding device of realizing described Integral Solution code method, it comprises original ripple collecting unit and the pretreatment unit that connects successively, and described pretreatment unit comprises complement code module, pulse recodification module, base pressure filtration module and the bandpass filtering modules block that connects successively; Wherein, the output of described bandpass filtering modules block is connected to respectively outlet terminal, integration is followed filtration module and continuous crest integration detection module, described integration follow filtration module and continuously the output of crest integration detection module be connected to respectively the input of outlet terminal and base pressure filtration module, the output of described base pressure filtration module is connected to outlet terminal.
Described original ripple collecting unit is the pressure transmitter that is installed on the standpipe, gather drilling hydraulic force signal in the standpipe, described pretreatment unit is arranged in the terrestrial interface case, it is by the bandpass filter filtering interference signals, and the signal after will processing delivers in the computer, and original waveform is carried out the integration decoding.
Operating principle of the present invention:
In the drilling process, pressure in the standpipe is subjected to inner drilling fluid (by the pump supercharging), downhole instrument is to the effect of drilling fluid, and the impact of disturbing, can form the pressure waveform of more complicated, the pressure transmitter that is installed on the standpipe gathers the continuous pressure waveform, and by H cable signal is delivered to the terrestrial interface case, the built-in low pass filter of terrestrial interface case, filtering interference signals forms filtered original waveform, data wire by the terrestrial interface case is connected to computer afterwards, original waveform is carried out the integration decoding, restore True Data, the value that integration obtains is compared with the waveform area threshold value of setting, more than or equal to be True Data, otherwise for disturbing.
Beneficial effect of the present invention:
The present invention introduces the double integration of following, and pulse signals is retrieved, and integration is followed the judgement of choosing that filtering mainly solves the discrete pulse signal, and the detection of crest integration is mainly for the judgement of choosing of continuous impulse signal continuously.Can automatically automatically adjust according to the variation of carrier wave and pulse strength, and the continuous impulse signal that utilizes the integrated intensity feature differentiation of crest to interfere with each other.The present invention can distinguish pulse and continuous impulse is judged respectively, independently sets up criterion and determination methods, thereby has significantly improved the accuracy of detection, reduces the artificial intensity of judging.
Description of drawings
Fig. 1 a is overall structure schematic diagram of the present invention, and Fig. 1 b is filtered original waveform figure, and Fig. 1 c is True Data figure;
Fig. 2 is filter sequence block diagram of the present invention;
Fig. 3 is pressure of foundation filtering part schematic diagram of the present invention;
Fig. 4 is bandpass filtering part schematic diagram of the present invention;
Fig. 5 is that integration of the present invention is followed the filtering part schematic diagram;
Fig. 6 is continuous crest integration demodulator probe schematic diagram of the present invention;
Wherein 1. offshore boring island, 2. standpipe, 3. pressure transmitter, 4. terrestrial interface case, 5. computer.
The specific embodiment
The present invention will be further elaborated below in conjunction with drawings and Examples, should be noted that following explanation only is in order to explain the present invention, its content not to be limited.
Meaning of parameters involved in the present invention sees Table 1.
Table 1. meaning of parameters
As shown in Figure 2, a kind of Integral Solution code method of drilling fluid wireless drilling instrument, concrete steps are as follows:
1) original ripple complement code: gather the drilling hydraulic force signal, and initial data is carried out original ripple complement code, polishing incomplete data group, filtering incomplete data group, the data group that unusually increases or reduce namely get quasi-continuous actual pressure data group, enter step 2);
2) pulse is recoded: convert the data group unification after the original ripple complement code to positive pulse, enter step 3);
3) base pressure filtering: the data group for being lower than base pressure Pbase, namely do not reach standard, directly demarcating is no pulse; Data group for being higher than base pressure Pbase namely reaches standard, enters step 4);
4) bandpass filtering step: the reference pulse cycle is T, and the logical scope of the band of bandpass filtering is Ti＜T＜Tf＜2T, and statistics pressure is higher than the continuous data group length H of base pressure Pbase; H＜Ti(is narrow), then demarcating is no pulse, extracts next constantly data, returns step 3); Ti＜H＜Tf(is moderate), then enter step 5), automatically adjust next constantly base pressure and basis pulses integrated intensity of data; H＞Tf(is wide), then enter step 6), utilize the continuous impulse signal of the integrated intensity differentiation phase mutual interference of crest;
5) integration is followed filter step: through the data that bandpass filtering is sent here, respectively choose the time of T/2 from the center time point front and back, compare the minimum pressure Pmin in this section time period, the pressure data Pn in the reference pulse cycle T is carried out integration, be designated as
M and basis pulses integrated intensity Mbase are compared: M＜Mbase(insufficient strength), then demarcating is no pulse, extracts next constantly data, returns step 3); M＞Mbase(intensity is enough), then being judged to be a pulse signal enters, actual carrier pressure when Pmin is the pulse signal generation, M is the actual strength of pulse signal in this cycle, reset basis pulses integrated intensity Mbase '=M*a, a is basic integration passing ratio, base pressure Pbase '=Pmin*b, b is the base pressure passing ratio, and the Mbase ' after will resetting and Pbase ' are updated to next constantly base pressure and basis pulses integrated intensity of data, then extract next constantly data, return step 3);
6) continuous crest integration detection step: improve base pressure Pbase is interim base pressure Ptemporary temporarily, length and the T that will be higher than the time period of Ptemporary compare, less than T, then be judged to be doubtful pulse crest, find the mid point of this crest, according to default temporary period width Ttemporary, determine the sampling scope, choose the pressure minimum value Pmin ' in the Ttemporary time period, pressure data Pn ' is carried out integration, be designated as
M '＜Mtemporary(insufficient strength), then demarcating is no pulse; M '＞Mtemporary(intensity is enough), then be judged to be a pulse signal and enter, and the starting point of definite pulse signal and terminal point; To remaining pulse signal of this period, again get back to this process and proceed to judge, until should all projections in the time period judge completely, then extract next constantly data, return step 3); Greater than T, then be judged to be Ptemporary inadequate with respect to the increase rate of Pbase, continuing to improve interim base pressure Ptemporary is Ptemporary ', until the duration of the bossing that is detected (length that is higher than the time period of interim base pressure) is less than T.
Wherein, step 2) in, can be according to by the pulse generation mode of acquisition target (mainly comprising positive pulse and negative pulse), convert the data group unification after the original ripple complement code to the same impulse form, i.e. unification converts positive pulse or negative pulse to, and both follow-up processing methods are similar, the concrete scope selection that below relates to and integral formula etc., still describe take impulse form as positive pulse as example, impulse form is that it will not go into details for the processing procedure of negative pulse.But the present invention only is not limited to and processes with the form of positive pulse.
Fig. 3 shows step 3), read time T n and pressure Pn, according to the pressure strength of carrier of reality, determine base pressure Pbase, Pn-Pbase＞0, then directly enter the bandpass filtering step, otherwise, output X=Tn, Y=0, N is updated to the data that N+1(will be higher than Pbase and directly is judged to be no pulse, then continues to read next group data).
It is width according to the waveform projection that Fig. 4 shows the step 4) bandpass filtering, judges that the fluctuation possibility of data belongs to a real pulse signal.Clutter is thought in narrow variation, thinks that no pulse enters, and wide signal then needs to judge whether to be that continuous impulse enters.
The pulse period T of a benchmark is set, needs simultaneously to arrange a logical scope of band, and allow the cycle lower limit Ti by bandpass filtering and allow cycle upper limit Tf (Ti＜T＜Tf＜2T) by bandpass filtering.Be higher than Pbase when detecting one group of data, then from these group data, be sent to bandpass filtering and process, judge the relation of the duration H of this segment data projection and Ti, T, Tf:
If H＜Ti illustrates that so this pulse width is too small, even if produce the data fluctuations of very large amplitude, also be considered as clutter, think that this time period is interior for pulse-free signal enters, then from next group data of this segment data, get back to base pressure filtering and proceed to judge.
If Ti＜H＜Th illustrates that this time period may have a pulse signal to enter, so this segment data is directly sent into integration and followed the filtering process of carrying out and process again.
If H＞Th, this moment, waveform may be subjected to the continuous impulse effect of signals to cause variation, and the pulse latter end may be affected by another pulse signal, can't get back to base pressure Pbase, and the trough between two pulses is no longer obvious.Simultaneously owing to influencing each other, except variation has all occured in the shape of crest part, if judge according to complete pulse intensity more no longer suitable, intensity that must differentiation pulse crest.Directly send this segment data into continuous crest integration detection process and process this moment.
Fig. 5 shows step 5), passes through the data that bandwidth filtering is sent here, respectively chooses the time of T/2 from the center time point front and back, compares the minimum pressure Pmin in this section time period, and the pressure data in the cycle T is carried out integration, is designated as
To M and the default pulse integration intensity of Mbase() compare.
If M＜Mbase thinks that so pressure change in this time period is not that the pulse of a true pulse causes.Then from the next one constantly, continue to get back to base pressure filtering and judge.
If M＞Mbase so, thinks to enter a real pulse in the cycle at T, within this time period and except T in the cycle other constantly, think not to be that pulse signal enters.Minimum pressure Pmin in T cycle this moment, the carrier wave pressure when reality occurs for pulse signal, the actual pulse integrated intensity M in the T cycle is the actual strength of pulse signal in this cycle.Owing to there is certain fluctuation (actual mud signal also can weaken along with the degree of depth increases) in carrier wave pressure, need to suitably relax the requirement of these two a reference values, get Mbase '=M*a (a is benchmark integration passing ratio), get Pbase '=Pmin*b (b is the base pressure passing ratio), the standard that filtering and the detection of continuous impulse integration are followed in base pressure filtering, integration is carried out in the minimum pressure value definition when again arriving according to the intensity of pulse this moment and pulse next time.Then extract next constantly data, begin to carry out base pressure filtering.
Fig. 6 shows step 6), and when continuous impulse occured, actual pressure did not also return to the intensity of original underlying carrier, and second pulse just occured.Although have trough between two continuous impulses, trough generally is higher than base pressure Pbase.As re-use integration and follow filtering this segment data is analyzed, because actual impulse waveform has no longer possessed the value of contrast, can cause error code.Continuously the detection of crest integration is the intensity of automatically judging crest part projection, calculates the integrated intensity of crest in the scope of certain narrow time, by to recently distinguishing clutter and pulse signal.
Concrete grammar is the interim base pressure Pbase that improves, judge the length of the time period that is higher than this interim base pressure Ptemporary, is lower than time T, then thinks the signal that has detected doubtful pulse crest; If this time period still is higher than T, think that so interim base pressure Ptemporary increase rate is inadequate, can continue to improve interim base pressure, until the duration of the bossing that is detected is less than T.
For the crest part that has detected, find the mid point of this crest, the temporary period width Ttemporary according to default determines the sampling scope, chooses Ttemporary time period pressure minimum value Pmin ', and pressure Pn ' is carried out integration, is designated as
Mtemporary is the integrated intensity of crest this moment, and the integrated intensity of this crest is actually according to Pbase at that time to be determined, therefore can automatically adjust according near the intensity of pulse at that time.The projection that is higher than this crest pulse strength, think that a pulse signal enters, determine starting point and the terminal point of pulse signal, to remaining pulse signal of this period, again getting back to this process proceeds to judge, until all the projection judgements in this section time period are complete, then constantly begin to get back to base pressure filtering from the next one and proceed to judge.
Fig. 1 a～1c shows a kind of integration decoding device of realizing described Integral Solution code method, it comprises original ripple collecting unit and the pretreatment unit that connects successively, and pretreatment unit comprises complement code module, pulse recodification module, base pressure filtration module and the bandpass filtering modules block that connects successively; Wherein, the output of bandpass filtering modules block is connected to respectively outlet terminal, integration is followed filtration module and continuous crest integration detection module, integration follow filtration module and continuously the output of crest integration detection module be connected to respectively the input of outlet terminal and base pressure filtration module, the output of base pressure filtration module is connected to outlet terminal.
Original ripple collecting unit is the pressure transmitter 3 that is installed on the standpipe 2, gather standpipe 2 interior drilling hydraulic force signals, pretreatment unit is arranged in the terrestrial interface case 4, it is by the bandpass filter filtering interference signals, and the signal after will processing delivers in the computer 5, and original waveform is carried out the integration decoding.
Operating principle of the present invention:
In the drilling process, the pressure that is positioned at 2 li of standpipes on the offshore boring island 1 is subjected to inner drilling fluid (by the pump supercharging), downhole instrument is to the effect of drilling fluid, and the impact of disturbing, can form the pressure waveform of more complicated, the pressure transmitter 3 that is installed on the standpipe 2 gathers the continuous pressure waveform, and by H cable signal is delivered to terrestrial interface case 4, terrestrial interface case 4 built-in low pass filters, filtering interference signals, form filtered original waveform, data wire by terrestrial interface case 4 is connected to outlet terminal afterwards, and namely computer 5, and original waveform is carried out the integration decoding, restore True Data, the value that integration obtains is compared with the waveform area value that experience obtains, more than or equal to be True Data, otherwise for disturbing.
Although above-mentionedly by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (6)
1. the Integral Solution code method of a drilling fluid wireless drilling instrument, it is characterized in that, carry out after pretreatment integration with gathering the original waveform that obtains, and with integrated value and setting threshold comparison, this integrated value then is judged to be True Data and output greater than setting threshold, otherwise, be judged to be and disturb and output, thereby irregular original ripple output is obtained square wave; Wherein, preliminary treatment comprises the bandpass filtering step, the reference pulse cycle is T, the logical scope of the band of bandpass filtering is Ti＜T＜Tf＜2T, Ti is for allowing the cycle lower limit by bandpass filtering, Tf is for allowing the cycle upper limit by bandpass filtering, and statistics pressure is higher than the continuous data group length H of base pressure Pbase; H＜Ti, then demarcating is no pulse; Ti＜H＜Tf then enters integration and follows filter step, and integrated value for pulse is arranged, and is adjusted next constantly base pressure and basis pulses integrated intensity of data greater than the demarcation of basis pulses integrated intensity automatically; H＞Tf then enters continuous crest integration detection step, and integrated value for pulse is arranged, and is utilized the continuous impulse signal of the integrated intensity differentiation phase mutual interference of crest greater than the demarcation of interim basis pulses integrated intensity.
2. the Integral Solution code method of a kind of drilling fluid wireless drilling instrument according to claim 1 is characterized in that, described pretreated concrete steps are as follows:
1) original ripple complement code: gather the drilling hydraulic force signal, and initial data is carried out original ripple complement code, polishing incomplete data group, the data group that unusually increases or reduce namely get quasi-continuous actual pressure data group, enter step 2);
2) pulse is recoded: convert the data group unification after the original ripple complement code to positive pulse, enter step 3);
3) base pressure filtering: for the data group that is lower than base pressure Pbase, directly demarcating is no pulse; Data group for being higher than base pressure Pbase enters step 4);
4) bandpass filtering step: the reference pulse cycle is T, and the logical scope of the band of bandpass filtering is Ti＜T＜Tf＜2T, and statistics pressure is higher than the continuous data group length H of base pressure Pbase; H＜Ti, then demarcating is no pulse, extracts next constantly data, returns step 3); Ti＜H＜Tf then enters integration and follows filter step, automatically adjusts next constantly base pressure and basis pulses integrated intensity of data; H＞Tf then enters continuous crest integration detection step, utilizes the continuous impulse signal of the integrated intensity differentiation phase mutual interference of crest.
3. the Integral Solution code method of a kind of drilling fluid wireless drilling instrument according to claim 2 is characterized in that, in the described step 4), integration is followed filter step and is:
Through the data that bandpass filtering is sent here, respectively choose the time of T/2 from the center time point front and back, compare the minimum pressure Pmin in this section time period, the pressure data Pn in the reference pulse cycle T is carried out integration, be designated as
M and basis pulses integrated intensity Mbase are compared; M＜Mbase, then demarcating is no pulse, extracts next constantly data, returns step 3); M＞Mbase, then being judged to be a pulse signal enters, actual carrier pressure when Pmin is the pulse signal generation, M is the actual strength of pulse signal in this cycle, reset basis pulses integrated intensity Mbase '=M*a, a is basic integration passing ratio, base pressure Pbase '=Pmin*b, b is the base pressure passing ratio, and the Mbase ' after will resetting and Pbase ' are updated to next constantly base pressure and basis pulses integrated intensity of data, then extract next constantly data, return step 3); Wherein, A represents the time ordinal number of the start time that the integration of doubtful pulse signal begins, A=(Q+L)/2-T/2, B represents the time ordinal number of the end time that the integration of doubtful pulse signal stops, B=(Q+L)/2+T/2-1, Q represents to be higher than the time ordinal number that base pressure continuous data group finishes, and L represents to be higher than the time ordinal number that base pressure continuous data group begins.
4. the Integral Solution code method of a kind of drilling fluid wireless drilling instrument according to claim 2 is characterized in that, in the described step 4), crest integration detection step is continuously:
Interim raising base pressure Pbase is interim base pressure Ptemporary, length and the T that will be higher than the time period of Ptemporary compare, less than T, then be judged to be doubtful pulse crest, find the mid point of this crest, according to default temporary period width Ttemporary, determine the sampling scope, choose the pressure minimum value Pmin ' in the Ttemporary time period, pressure data Pn ' is carried out integration, be designated as
M '＜interim basis pulses integrated intensity Mtemporary, then demarcating is no pulse; M '＞Mtemporary then is judged to be a pulse signal and enters, and the starting point of definite pulse signal and terminal point; To remaining pulse signal of this period, again get back to this process and proceed to judge, until should all projections in the time period judge completely, then extract next constantly data, return step 3); Greater than T, then be judged to be Ptemporary inadequate with respect to the increase rate of Pbase, continuing to improve interim base pressure Ptemporary is Ptemporary ', until the duration of the bossing that is detected is less than T; Wherein, the time ordinal number of the start time that the integration of the doubtful pulse signal of A ' expression begins, A '=(W+R)/2-Ttemporary/2, the time ordinal number of the end time that the integration of the doubtful pulse signal of B ' expression stops, B '=(W+R)/2+Ttemporary/2-1, W represents to be higher than the time ordinal number that interim base pressure continuous data group begins, and R represents to be higher than the time ordinal number that interim base pressure continuous data group finishes.
5. integration decoding device of realizing the described Integral Solution code method of claim 1～4, it is characterized in that, it comprises original ripple collecting unit and the pretreatment unit that connects successively, and described pretreatment unit comprises complement code module, pulse recodification module, base pressure filtration module and the bandpass filtering modules block that connects successively; Wherein, the output of described bandpass filtering modules block is connected to respectively outlet terminal, integration is followed filtration module and continuous crest integration detection module, described integration follow filtration module and continuously the output of crest integration detection module be connected to respectively the input of outlet terminal and base pressure filtration module, the output of described base pressure filtration module is connected to outlet terminal.
6. integration decoding device according to claim 5, it is characterized in that, described original ripple collecting unit is the pressure transmitter that is installed on the standpipe, gather drilling hydraulic force signal in the standpipe, described pretreatment unit is arranged in the terrestrial interface case, it is by the bandpass filter filtering interference signals, and the signal after will processing delivers in the computer, original waveform is carried out integration decode.
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| CN102238121A (en) * | 2011-04-19 | 2011-11-09 | 无锡辐导微电子有限公司 | Integration decoding method and relevant device |
| CN102966346A (en) * | 2012-11-09 | 2013-03-13 | 西安冠林智能科技有限公司 | Wireless low-power-consumption oil well indicator based on Zigbee network |
| CN103063274A (en) * | 2012-12-25 | 2013-04-24 | 天津大学 | Piezoelectric transducer downhole liquid level measuring instrument |
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