Calibration device for miniature pressure sensor on the surface of helicopter blade

Abstract

The invention discloses a micro pressure sensor calibration device on the surface of a helicopter blade, comprising: a base, a pressurizing cavity is opened in the base, an upper end of the pressurizing cavity protrudes from the upper surface of the base and a ring cavity is formed, and a side of the base is provided with The air inlet and outlet communicated with the pressurizing cavity are used to pass the output end of the pressure controller; the sleeve, the upper part of the sleeve is provided with a top cavity, and the lower part is provided with a clamping cavity communicating with the top cavity, and the clamping cavity is The inner diameter of the cavity is larger than the inner diameter of the top cavity; the sealing head is provided with a gap on both sides of the upper part of the sealing head, and a pair of first wiring posts and a pair of second wiring posts are respectively arranged from each gap to the bottom surface of the sealing head; The pair of first binding posts are used for connecting the signal lines of the micro pressure sensor, and the pair of second binding posts are used for connecting the power lines of the micro pressure sensor. The invention can realize rapid and batch calibration of the micro pressure sensor.

Description

technical field [0001] The invention relates to the field of sensor calibration, in particular to a calibration device for a miniature pressure sensor on the surface of a helicopter blade. Background technique [0002] With the vigorous development of microelectronics processing technology, miniature pressure sensors are widely used in aviation, aerospace and other scientific research and production fields. According to the requirements of JJG860 national verification regulations, traditional pressure sensors above medium and high pressure often use threaded joints to connect the sensor of the pressure sensor to be tested. The pressure end is connected with the pressure measurement standard device to realize the purpose of the measurement standard device providing different target pressure values ​​to the inspected. However, the size of miniature pressure sensors is often only a few millimeters, and threaded connection cannot be realized, and because the pressure range is of...

AI Technical Summary

Problems solved by technology

However, the size of miniature pressure sensors is often only a few millimeters, and threaded connection cannot be realized, and because the pressure range is often less than 200kPa, the current practice is to use soft materials such as putty or plasticine to test the micro pressure sensor and measurement standard device. The surrounding area of ​​the pressure output end is filled with the above-mentioned soft material to achieve the function of sealing, so as to carry out the measurement work

[0003] The traditional method has the following deficiencies: First, because the tested sensor belongs to the micro-pressure field, if the software material is blocked and not compacted, and there is leakage, the measurement personnel cannot detect it in time, resulting in inaccurate measurement results. Second, the traditional sensor calibration The process takes a long time, only one sensor can be calibrated at a time, and batch calibration and positioning of sensors cannot be realized

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