CN104697426A - Method for automatically searching zero position of displacement sensor - Google Patents
Method for automatically searching zero position of displacement sensor Download PDFInfo
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- CN104697426A CN104697426A CN201310670795.2A CN201310670795A CN104697426A CN 104697426 A CN104697426 A CN 104697426A CN 201310670795 A CN201310670795 A CN 201310670795A CN 104697426 A CN104697426 A CN 104697426A
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Abstract
The invention discloses a method for quickly and automatically searching a zero position of a displacement sensor in alternating-current input and output. The technical scheme includes that by adoption of labview programmed measurement and control software, sensor data are acquired by a data acquisition board, and then a precision test board is controlled to realize quickness and automation in searching of the zero position of the displacement sensor. By adoption of the method, automation in searching of the zero position of the sensor is realized, and operation efficiency in sensor test is greatly improved.
Description
Technical field
The present invention relates to a kind of method that fast searching has the interchange input and output transducer zeroing position of positive and negative stroke.
Background technology
Along with constantly improving and development of aeronautical product technology, the displacement transducer product as system information feedback is widely used.The first step of displacement transducer test finds null positions exactly, and a kind of current method is on manual test platform, shakes and sees voltage table, and small change speed can manage it, and follow-up test is all that manual test speed is very slow, can not realize robotization; Another kind method is on automatic testing stand, manually approaches gradually with different steppings or speed, and speed is very slow, and follow-up test can robotization, can only be semi-automatic at last.
Summary of the invention
Object of the present invention
Labview software is utilized automatic testing stand and data collecting plate card to be combined a kind of method of fast automatic searching transducer zeroing position.
The technical scheme that the present invention takes
A fast automatic odd change method for sensor, comprises the following steps:
Step one, be arranged on test board by sensor, connect power supply and have data collecting card or the instrument of synchronized sampling function, the TT&C software adopting labview to write by computer run, carries out following operation;
Step 2, by capture card or instrument synchronous acquisition sensor input/output signal parameter;
The signal parameter that step 3, basis collect, judge the polarity of the relative input voltage of sensor output voltage, polarity judges to be processed signal by TT&C software, cross correlation process is carried out to input/output signal, by the polarity of the relative input voltage of positive negative judgement sensor output voltage of intermediate value obtaining result; From the signal collected, extract the amplitude of simple signal and be converted into effective value, obtain output voltage, according to output voltage values divided by sensor scale-up factor, draw angular turn value or the shift value of rotor sensor or iron core, again according to the polarity of the relative input voltage of sensor output voltage, draw the rotor turns of sensor or the direction of iron core movement;
Step 4, the result obtained according to step 3, control test board and drive rotor sensor or iron core to move accordingly:
After step 5, test stand to be measured go to the position of step 4 correspondence, pick-up transducers output voltage again, judges that the magnitude of voltage exported is whether in the claimed range of this transducer zeroing voltage, if in claimed range, then carries out step 6; Otherwise, repeat step 2 to step 5, until sensor output voltage is in the claimed range of total null voltage, carry out step 6;
Step 6, for making output voltage reach 1.5 ~ 2.5 times of this model transducer zeroing voltage request scope, any number is got in 1.5 ~ 2.5 times of this model transducer zeroing voltage request scope, again divided by sensor scale-up factor, draw angular turn value or the shift value of rotor sensor or iron core, control test board band dynamic sensor carries out rotor or iron core moves accordingly, after repeating step 2 to the operation of step 4, gather output voltage numerical value, now obtain total null voltage and null positions that sensor output voltage and test board position are sensor.
Step 7, preservation null positions and total null voltage, operation terminates.
The advantage that the present invention has and beneficial effect:
No matter traditional method of null positions of looking for is manual platform or estrade is all to be referred to as manual methods automatically, and need artificial judgment, not only speed is slow, and hinders the development of testing apparatus to automation direction greatly.
The present invention is by the process implementation robotization of this searching null positions.By TT&C software by computing machine, virtual instrument and automatic Test Table combine, all operations is carried out automatically with the software controlling all to be worked out by labview, without the need to artificial participation, eliminate the impact of human factor, provide work efficiency, not only liberate the full-automation test that human resources improve measuring stability simultaneously sensor simultaneously.
Embodiment
Below in conjunction with instantiation, the present invention is described in further detail:
Step one, be arranged on test board by sensor, connect power supply and have data collecting card or the instrument of synchronized sampling function, the TT&C software adopting labview to write by computer run, carries out following operation;
Step 2, by multifunctional data acquisition card or instrument synchronous acquisition sensor input/output signal parameter;
The signal parameter that step 3, basis collect, judge the polarity of the relative input voltage of sensor output voltage, polarity judges to be processed signal by TT&C software, cross correlation process is carried out to input/output signal, by the polarity of the relative input voltage of positive negative judgement sensor output voltage of intermediate value obtaining result; From the signal collected, extract the amplitude of simple signal and be converted into effective value, obtain output voltage, according to output voltage values divided by sensor scale-up factor, draw angular turn value or the shift value of rotor sensor or iron core, again according to the polarity of the relative input voltage of sensor output voltage, draw the rotor turns of sensor or the direction of iron core movement;
Step 4, the result obtained according to step 3, control test board and drive rotor sensor or iron core to move accordingly:
After step 5, test stand to be measured go to the position of step 4 correspondence, pick-up transducers output voltage again, judges that the magnitude of voltage exported is whether in the claimed range of this transducer zeroing voltage, if in claimed range, then carries out step 6; Otherwise, repeat step 2 to step 5, until sensor output voltage is in the claimed range of total null voltage, carry out step 6;
Step 6, for making output voltage reach 1.5 ~ 2.5 times of this model transducer zeroing voltage request scope, any number is got in 1.5 ~ 2.5 times of this model transducer zeroing voltage request scope, again divided by sensor scale-up factor, draw angular turn value or the shift value of rotor sensor or iron core, control test board band dynamic sensor carries out rotor or iron core moves accordingly, after repeating step 2 to the operation of step 4, gather output voltage numerical value, now obtain total null voltage and null positions that sensor output voltage and test board position are sensor.
Step 7, preservation null positions and total null voltage, operation terminates.
Embodiment:
Certain model angular displacement sensor, total null voltage requires to be less than 0.02V, and polar requirement is, from null positions, when rotor sensor turns clockwise, output voltage and input voltage same-phase, namely the output voltage of synchronous collecting card is just, otherwise is negative, and scale-up factor is 0.125V/ °.
Sensor is arranged on precision measurement platform, connects the PXI-6132 multifunctional data acquisition card of sine-wave power and NI, run the measurement and control program adopting labview to write on computers;
The signal that PXI-6132 collects is carried out to polarity judgement and extracts the amplitude of simple signal and be converted into effective value and be converted into effective value, obtains output voltage.Polarity judges to be processed signal by TT&C software, carries out cross correlation process to input/output signal, by the polarity of the relative input voltage of positive negative judgement sensor output voltage of intermediate value obtaining result.Analysis processing result is: the intermediate value of input/output signal cross correlation process result is negative value, and extracting simple signal and being converted into effective value is 3.425V, and final conclusion is-3.425V;
Judge according to result and polar requirement, now sensor needs to rotate clockwise A=3.425V/0.125V/ °=27.4 °, makes it rotate clockwise 27.4 ° to test board input instruction;
Test stand to be measured repeats above step after going to position, until the output voltage that PXI-6132 obtains is less than 0.02V, now output voltage is-0.011V;
Due to the error of sensor own, although now output voltage is qualified, not necessarily minimum output voltage, and contain other undesired signal, need operation further to obtain minimum output voltage; According to the result-0.011V of previous step, control test board and be rotated counterclockwise A
1=0.03V/0.125V/ °=0.24 °, then by capture card synchronous acquisition input/output signal, obtaining output voltage through process is-0.037V, controls test board and rotates A clockwise
2=0.037V/0.125V/ °=0.296 °, the voltage 0.006V now obtained by PXI-6132 is total null voltage, and the absolute position of test board is null positions;
Preserve total null voltage and null positions.
Claims (2)
1. a method for Automatic-searching displacement transducer null positions, is characterized in that, comprises the following steps:
Step one, be arranged on test board by sensor, connect power supply and have data collecting card or the instrument of synchronized sampling function, the TT&C software adopting labview to write by computer run, carries out following operation;
Step 2, by capture card or instrument synchronous acquisition sensor input/output signal parameter;
The signal parameter that step 3, basis collect, judges the polarity of the relative input voltage of sensor output voltage; From the signal collected, extract the amplitude of simple signal and be converted into effective value, obtain output voltage, according to output voltage values divided by sensor scale-up factor, draw angular turn value or the shift value of rotor sensor or iron core, again according to the polarity of the relative input voltage of sensor output voltage, draw the rotor turns of sensor or the direction of iron core movement;
Step 4, the result obtained according to step 3, control test board and drive rotor sensor or iron core to move accordingly:
After step 5, test stand to be measured go to the position of step 4 correspondence, pick-up transducers output voltage again, judges that the magnitude of voltage exported is whether in the claimed range of this transducer zeroing voltage, if in claimed range, then carries out step 6; Otherwise, repeat step 2 to step 5, until sensor output voltage is in the claimed range of total null voltage, carry out step 6;
Step 6, for making output voltage reach 1.5 ~ 2.5 times of this model transducer zeroing voltage request scope, any number is got in 1.5 ~ 2.5 times of this model transducer zeroing voltage request scope, again divided by sensor scale-up factor, draw angular turn value or the shift value of rotor sensor or iron core, control test board band dynamic sensor carries out rotor or iron core moves accordingly, after repeating step 2 to the operation of step 4, gather output voltage numerical value, now obtain total null voltage and null positions that sensor output voltage and test board position are sensor.
Step 7, preservation null positions and total null voltage, operation terminates.
2. the automation change method of a kind of sensor according to claim 1, it is characterized in that, described polarity judges to be processed signal by TT&C software, cross correlation process is carried out to input/output signal, by the polarity of the relative input voltage of positive negative judgement sensor output voltage of intermediate value obtaining result.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310670795.2A CN104697426B (en) | 2013-12-10 | 2013-12-10 | A kind of method of Automatic-searching displacement sensor null positions |
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| CN201310670795.2A CN104697426B (en) | 2013-12-10 | 2013-12-10 | A kind of method of Automatic-searching displacement sensor null positions |
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| CN104697426A true CN104697426A (en) | 2015-06-10 |
| CN104697426B CN104697426B (en) | 2018-07-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107727029A (en) * | 2017-09-21 | 2018-02-23 | 北京航空航天大学 | A kind of magnetic bearing is demarcated with displacement transducer and detection means |
| CN111026778A (en) * | 2019-12-16 | 2020-04-17 | 华南理工大学广州学院 | Data searching method of multifunctional engraving machine based on LabVIEW |
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| DE102008062864A1 (en) * | 2008-05-21 | 2009-11-26 | Continental Teves Ag & Co. Ohg | Path sensor arrangement for use in brake system of motor vehicle, has displacement element with position sensor magnet, which is displaceably arranged relative to soft magnetic coupling element along measurement direction |
| CN103162609A (en) * | 2011-12-09 | 2013-06-19 | 上海球栅测量系统有限公司 | System and method of displacement measurement |
| CN103162614A (en) * | 2013-03-28 | 2013-06-19 | 重庆理工大学 | Online self-calibration method for angular displacement sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727029A (en) * | 2017-09-21 | 2018-02-23 | 北京航空航天大学 | A kind of magnetic bearing is demarcated with displacement transducer and detection means |
| CN107727029B (en) * | 2017-09-21 | 2019-09-03 | 北京航空航天大学 | A kind of magnetic bearing displacement sensor calibration and detection device |
| CN111026778A (en) * | 2019-12-16 | 2020-04-17 | 华南理工大学广州学院 | Data searching method of multifunctional engraving machine based on LabVIEW |
| CN111026778B (en) * | 2019-12-16 | 2023-05-30 | 华南理工大学广州学院 | Data searching method of multifunctional engraving machine based on LabVIEW |
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| CN104697426B (en) | 2018-07-24 |
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