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6 February 2022 Design of pulse pressure test sensor and analysis of vibration disturbance factors
Chao Deng, Chun-jun Chen, Dong-wei Wang, Zhi-ying He
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Proceedings Volume 12081, Sixth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2021); 120813E (2022) https://doi.org/10.1117/12.2623898
Event: Sixth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2021), 2021, Chongqing, China
Abstract
Due to the low amplitude of surface fluctuation pressure of high-speed train, and easily influenced by the vibration of vehicle body, it is difficult to measure the fluctuation pressure by using the micro piezoresistive pressure sensor, which is commonly used in aerodynamic testing. Based on the analysis of the principle and the structure of stress concentration of the micro piezoresistive sensor, the stress concentration was increased by integrating rib structure under the film. As a result, the sensitivity of the sensor is improved. The linear performance of the sensor is improved by integrating the massive structure on the rib. The finite element numerical simulation method is used to simulate the output performance of the rib block structure. Finally, a sensor with a range of 20 kPa, a sensitivity of 33.37 mv/kPa and a linearity of 0.14% is obtained. The amplitude of measured error is less than 0.1Pa by loading the measured signal. The vibration characteristics of the sensor are analyzed by the vibration test platform. The disturbance of vibration to the sensor can be obtained by simulating and separating the influence of the vibration disturbance signal to the flow field in CFD software. The influence of vibration disturbance signal on the sensitive structure of rib block is simulated. By comparing the results of numerical simulation with the measured data, the amplitude and trend are consistent. The results show that the analysis of vibration disturbance is correct, which provides a theoretical basis for the extraction of vibration error.
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Chao Deng, Chun-jun Chen, Dong-wei Wang, and Zhi-ying He "Design of pulse pressure test sensor and analysis of vibration disturbance factors", Proc. SPIE 12081, Sixth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2021), 120813E (6 February 2022); https://doi.org/10.1117/12.2623898
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KEYWORDS
Sensors
Resistance
Analytical research
Numerical simulations
Piezoresistive sensors
Resistors
Thin films
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