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Performance test method of externally excited vibrating cylinder pressure sensor

A pressure sensor and testing method technology, applied in the direction of force/torque/work measuring instrument calibration/testing, instruments, measuring devices, etc. Coarse test results and other problems, to achieve the effect of high test efficiency, improved accuracy and reliability, and reliable test data

Active Publication Date: 2019-07-05
CHENGDU KAITIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the existing technology is that the test results are relatively rough, which can only reflect whether there is a jump point in the working pressure range of the tested sensor, whether the output curve is a monotonic curve, and cannot directly judge whether the output accuracy of the tested sensor is Qualified, causing the tested sensor that passed the test to be out of tolerance in the subsequent calibration test
Secondly, the installation is troublesome. Each tested sensor must be tested by welding the test cable to the coil pin of the tested sensor, and only one tested sensor can be tested at a time.
When replacing components with different ranges and models for testing, it is also necessary to replace the test box, which is time-consuming and laborious

Method used

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  • Performance test method of externally excited vibrating cylinder pressure sensor
  • Performance test method of externally excited vibrating cylinder pressure sensor
  • Performance test method of externally excited vibrating cylinder pressure sensor

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Embodiment Construction

[0017] see figure 1 . According to the present invention, in the performance test system of the externally excited vibrating cylinder pressure sensor, a vibrating cylinder pressure sensor is used as the standard pressure sensor, and the measured sensor as the measured part is connected between the standard pressure sensor and the standard amplifier, and the composition is composed of A test tool that is electrically connected to the test circuit of the susceptor under test; the two-body spring probe is used to contact and connect the coil pins on the susceptor to be tested, and a fixed base is used to move the two-body spring probe to electrically connect the test circuit and the test circuit. For the test piece, fix the sensor under test on the test fixture, and then apply the same working pressure to the sensor under test and the standard pressure sensor, starting from 0kPa, and gradually increase to the full scale at every 0.25kPa pressure, using signal conditioning The PX...

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Abstract

The present invention provides a separately excited vibrating cylinder pressure sensor performance test method, and the objective of the invention is to provide a test method with high test precision, reliable test data and high test efficiency. According to the technical scheme, the method comprises: in a separately excited vibrating cylinder pressure sensor performance test system, a vibrating cylinder pressure sensor is taken as a standard pressure sensor, a detected sensor taken as a detected piece is connected between the standard pressure sensor and a standard amplifier to form a test tool electrically connected with the detected sensor test circuit; a PXI data collection card is employed to collect the output frequencies of the standard pressure sensor and the detected sensor and the temperature voltage signals of the standard pressure sensor, the system test software is employed to calculate the actual error of each pressure point, and a comparison method is employed to determine whether the output precision with the maximum error difference being not larger than 1000ppm is taken as the approval standard of the detected sensor or not so as to test the room temperature output precision of the detected sensor.

Description

technical field [0001] The invention relates to a method for testing the performance of a susceptor of an externally excited vibrating cylinder pressure sensor. Background technique [0002] With the continuous improvement of the quantity and accuracy of various information of air data in modern aircraft, air data computers have been widely used in modern aircraft to measure and process various air data information. The most basic information of the air data computer is the aircraft's flight altitude, true airspeed, indicated airspeed, Mach number, atmospheric temperature and atmospheric density. The rest of the information can be calculated from these six information. And these 6 basic information are all obtained by calculating the 4 original parameters of total pressure, static pressure, total temperature and angle of attack. Accurate and stable measurement of these four parameters is very important to ensure the accurate and stable operation of the atmospheric data comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L25/00
CPCG01L25/00
Inventor 白建君朱洪亮何俊罗静刘兴业高积全冯旗
Owner CHENGDU KAITIAN ELECTRONICS
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