Calibration device and method of rotor blade embedded micro pressure sensors

Abstract

The invention discloses a calibration device method of rotor blade embedded micro pressure sensors. The device and the method aim to realize integral calibration of the embedded pressure sensors on arotor blade. The method specifically includes the steps that the micro pressure sensors are embedded in the rotor blade and then placed in a closed container, the pressure and temperature in the closed container are adjusted, data acquisition of the micro pressure sensors is completed through a data acquisition system outside the closed container after the target temperature and pressure are reached, and performance parameters of the micro pressure sensors are calibrated through a computer. Compared with a traditional embedding-after-calibration method, the calibration device achieves the integral calibration of the sensors after the sensors are embedded in the blade, the sensors embedded in the blade are calibrated before testing, and the influence of external factors before testing is avoided.

Description

technical field [0001] The invention relates to the field of wind tunnel tests, in particular to a calibration device and a calibration method for a miniature pressure sensor embedded in a rotor blade. Background technique [0002] Helicopters are different from other aircrafts. Because of their characteristics of hovering in the air, vertical take-off and landing, and low-speed maneuvering, they are widely used in military and civilian fields. With the expansion of its functional application, the research on helicopter technology has been continuously deepened. The unsteady load measurement of rotor blades is an important content in helicopter technology. The method of embedding pressure sensors on the surface of rotor blades is widely used at home and abroad, which has the characteristics of good test accuracy and high dynamic response frequency. [0003] In order to obtain accurate pressure data, the pressure sensor needs to be calibrated before the unsteady load test of...

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Problems solved by technology

[0005] Secondly, because every test of the rotor blade needs to calibrate the pressure sensor, that is to say, every calibration must be carried out outside the blade, thus increasing the damage rate of the sensor;

[0006] Finally, because each test on the rotor blade needs to embed several sensors, it cannot be ruled out that the sensor has been damaged during the embedding process after sensor calibration, but it cannot be found, so that the accuracy of the test cannot be guaranteed.

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