CN104697426B - A kind of method of Automatic-searching displacement sensor null positions - Google Patents
A kind of method of Automatic-searching displacement sensor null positions Download PDFInfo
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- CN104697426B CN104697426B CN201310670795.2A CN201310670795A CN104697426B CN 104697426 B CN104697426 B CN 104697426B CN 201310670795 A CN201310670795 A CN 201310670795A CN 104697426 B CN104697426 B CN 104697426B
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Abstract
The present invention is a kind of fast automatic odd change method of the displacement sensor of exchange input and output.The technical solution adopted by the present invention is that：The TT＆C software write using labview is acquired sensing data by data collecting plate card, then controls precision measurement platform, reach fast automatic and find transducer zeroing position.The present invention realizes the Automatic-searching of transducer zeroing position, greatly improves sensor test working efficiency.
Description
Technical field
The present invention relates to a kind of methods that quick searching has the exchange input and output transducer zeroing position of positive and negative stroke.
Background technology
Constantly improve with aeronautical product technology and development, the displacement sensor product as system information feedback obtain
It is widely applied.The first step of displacement sensor test is exactly to find null positions, and mesh former approach is in manual test platform
On, see that voltmeter, small change speed can manage it while shaking, follow-up test is entirely that manual test speed is very slow, be can not achieve certainly
Dynamicization；Another method is manually gradually approached with different steppings or rate on automatic testing stand, and speed is very slow, subsequently
Test can automate, can only be semi-automatic at last.
Invention content
The purpose of the present invention
Automatic testing stand and data collecting plate card are combined to fast automatic searching sensor using labview softwares
A kind of method of null positions.
The technical solution that the present invention takes
A kind of fast automatic odd change method of sensor, includes the following steps：
Step 1: sensor is mounted on testboard, power supply and the data collecting card with synchronized sampling function are connected
Or instrument, the TT＆C software write using labview by computer operation carry out following operation；
Step 2: passing through capture card or instrument synchronous acquisition sensor input/output signal parameter；
Step 3: according to collected signal parameter, polarity of the sensor output voltage with respect to input voltage, polarity are judged
Judgement is handled signal by TT＆C software, cross correlation process is carried out to input/output signal, by obtaining the centre of result
Polarity of the positive negative judgement sensor output voltage of value with respect to input voltage；The width of simple signal is extracted from collected signal
It is worth and is converted into virtual value, obtain output voltage, according to output voltage values divided by sensor ratio coefficient, obtains rotor sensor
Or the angular turn value or shift value of iron core, the polarity further according to sensor output voltage with respect to input voltage obtain sensor
Rotor rotation or iron core movement direction；
Step 4: driving rotor sensor or iron core to carry out accordingly as a result, controlling testboard according to what step 3 obtained
Movement：
Step 5: after test stand to be measured goes to the corresponding position of step 4, sensor output voltage is acquired again, judges to export
Voltage value whether in the claimed range of the transducer zeroing voltage, if in claimed range, carry out step 6；It is no
Then, it repeats step 2 and arrives step 5, until sensor output voltage is in the claimed range of total null voltage, progress step 6；
Step 6: to make output voltage reach 1.5~2.5 times of the model transducer zeroing voltage request range, at this
Take any number in 1.5~2.5 times of model transducer zeroing voltage request range, then divided by sensor ratio coefficient, obtain
The angular turn value or shift value of rotor sensor or iron core, control testboard drive sensor progress rotor or iron core corresponding
Movement, after repeating step 2 to the operation of step 4, acquire output voltage numerical value, obtain at this time sensor output voltage with
Testboard position is the total null voltage and null positions of sensor.
Step 7: preservation null positions and total null voltage, operation terminate.
The present invention has the advantage that and advantageous effect：
Traditional look for either manual platform of the method for null positions or automatic estrade is all that can be referred to as manual methods, is needed
Artificial judgment is wanted, not only speed is slow, but also greatly hinders development of the test equipment to automation direction.
The process of the searching null positions is realized automation by the present invention.By TT＆C software by computer, virtual instrument
It combining with automatic Test Table, all operations and control are all carried out by the labview softwares worked out automatically,
Without manually participating in, the influence of human factor is eliminated, working efficiency is provided, human resources is not only liberated and improves test simultaneously
Stability simultaneously test by the full-automatic of sensor.
Specific implementation mode
The present invention is described in further detail with reference to specific example：
Step 1: sensor is mounted on testboard, power supply and the data collecting card with synchronized sampling function are connected
Or instrument, the TT＆C software write using labview by computer operation carry out following operation；
Step 2: passing through multifunctional data acquisition card or instrument synchronous acquisition sensor input/output signal parameter；
Step 3: according to collected signal parameter, polarity of the sensor output voltage with respect to input voltage, polarity are judged
Judgement is handled signal by TT＆C software, cross correlation process is carried out to input/output signal, by obtaining the centre of result
Polarity of the positive negative judgement sensor output voltage of value with respect to input voltage；The width of simple signal is extracted from collected signal
It is worth and is converted into virtual value, obtain output voltage, according to output voltage values divided by sensor ratio coefficient, obtains rotor sensor
Or the angular turn value or shift value of iron core, the polarity further according to sensor output voltage with respect to input voltage obtain sensor
Rotor rotation or iron core movement direction；
Step 4: driving rotor sensor or iron core to carry out accordingly as a result, controlling testboard according to what step 3 obtained
Movement：
Step 5: after test stand to be measured goes to the corresponding position of step 4, sensor output voltage is acquired again, judges to export
Voltage value whether in the claimed range of the transducer zeroing voltage, if in claimed range, carry out step 6；It is no
Then, it repeats step 2 and arrives step 5, until sensor output voltage is in the claimed range of total null voltage, progress step 6；
Step 6: to make output voltage reach 1.5~2.5 times of the model transducer zeroing voltage request range, at this
Take any number in 1.5~2.5 times of model transducer zeroing voltage request range, then divided by sensor ratio coefficient, obtain
The angular turn value or shift value of rotor sensor or iron core, control testboard drive sensor progress rotor or iron core corresponding
Movement, after repeating step 2 to the operation of step 4, acquire output voltage numerical value, obtain at this time sensor output voltage with
Testboard position is the total null voltage and null positions of sensor.
Step 7: preservation null positions and total null voltage, operation terminate.
Embodiment：
Certain model angular displacement sensor, total null voltage require to be less than 0.02V, and polar requirement is, since null positions, pass
When sensor rotor clockwise rotates, output voltage and input voltage same-phase, the i.e. output voltage of synchronous collecting card be just, it is on the contrary
It is negative, proportionality coefficient is 0.125V/ °.
Sensor is mounted on precision measurement platform, the PXI-6132 multifunctional data acquirings of sine-wave power and NI are connected
Card, the measurement and control program that operation is write using labview on computers；
Polarity judgement is carried out to the collected signals of PXI-6132 and extracts the amplitude of simple signal and is converted into virtual value
And it is converted into virtual value, obtain output voltage.Polarity judgement is handled signal by TT＆C software, to input/output signal
Cross correlation process is carried out, by obtaining the polarity of the opposite input voltage of the positive negative judgement sensor output voltage of median of result.
Analysis and processing result is：The median of input/output signal cross correlation process result is negative value, extracts simple signal and is converted into
Virtual value is 3.425V, and final conclusion is -3.425V；
Judged according to handling result and polar requirement, at this time sensor need to rotate clockwise A=3.425V/0.125V/ °=
27.4 °, it is set to rotate clockwise 27.4 ° to testboard input instruction；
Test stand to be measured, which is gone to, repeats above step behind position, until the output voltage that PXI-6132 is obtained is less than 0.02V, this
When output voltage be -0.011V；
Due to sensor error itself, although output voltage is qualified at this time, it is not necessarily minimum output
Voltage, and other interference signals are contained, minimum output voltage needs further operating in order to obtain;According to the knot of previous step
Fruit -0.011V, control testboard rotate A counterclockwise1=0.03V/0.125V/ °=0.24 °, then pass through capture card synchronous acquisition
Input/output signal, it is -0.037V to obtain output voltage by processing, and control testboard rotates A clockwise2=
0.037V/0.125V/ °=0.296 °, the voltage 0.006V obtained at this time by PXI-6132 is total null voltage, testboard
Absolute position is null positions；
Preserve total null voltage and null positions.
Claims (2)
1. a kind of method of Automatic-searching displacement sensor null positions, characterized in that include the following steps：
Step 1: sensor is mounted on testboard, power supply and the data collecting card with synchronized sampling function or instrument are connected
Device, the TT＆C software write using labview by computer operation carry out following operation；
Step 2: passing through capture card or instrument synchronous acquisition sensor input/output signal parameter；
Step 3: according to collected signal parameter, polarity of the sensor output voltage with respect to input voltage is judged；From collecting
Signal in extraction simple signal amplitude and be converted into virtual value, output voltage is obtained, according to output voltage values divided by sensing
Device proportionality coefficient obtains the angular turn value of rotor sensor or the shift value of iron core, opposite further according to sensor output voltage
The polarity of input voltage obtains the direction of rotor rotation or the iron core movement of sensor；
Step 4: driving rotor sensor or iron core to be moved accordingly as a result, controlling testboard according to what step 3 obtained：
Step 5: after test stand to be measured goes to the corresponding position of step 4, sensor output voltage is acquired again, judges the electricity of output
Pressure value, if in claimed range, carries out step 6 whether in the claimed range of the transducer zeroing voltage；Otherwise, weight
Multiple step 2 arrives step 5, until sensor output voltage is in the claimed range of total null voltage, progress step 6；
Step 6: to make output voltage reach 1.5~2.5 times of transducer zeroing voltage request range, in transducer zeroing electricity
Take any number in 1.5~2.5 times of pressure request range, then divided by sensor ratio coefficient, obtain the angle of rotor sensor
The shift value of rotational value or iron core, control testboard drive sensor progress rotor or iron core to move accordingly, repeat to walk
After rapid two arrive the operation of step 4, output voltage numerical value is acquired, sensor output voltage is obtained at this time and testboard position is
The total null voltage and null positions of sensor；
Step 7: preservation null positions and total null voltage, operation terminate.
2. according to the method described in claim 1, it is characterized in that, the polarity judges through TT＆C software to signal
Reason carries out cross correlation process, the positive negative judgement sensor output voltage phase of the median by obtaining result to input/output signal
To the polarity of input voltage.
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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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| CN104697426B true CN104697426B (en) | 2018-07-24 |
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| 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 |
| 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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| 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 |
| CN103322919A (en) * | 2013-05-27 | 2013-09-25 | 广东万濠精密仪器股份有限公司 | Grating ruler and method for finding null position of grating ruler quickly |
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2013
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103322919A (en) * | 2013-05-27 | 2013-09-25 | 广东万濠精密仪器股份有限公司 | Grating ruler and method for finding null position of grating ruler quickly |
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