Dynamic Calibration of Pressure Sensors With a Shock Tube

Hongbo Wang, Cheng Li, Li Zhang, Wu Zeng

Abstract

Dynamic calibration of pressure sensors is becoming more important. Shock tubes can generate a pressure step which could provide the basis for dynamic calibration of pressure sensors. The amplitude of this pressure step generated upon reflection of the wave from the end face of the tube can be determined accurately from ideal gas theory using readily measured parameters, such as shock wave velocity, static temperatures and pressures which can be traceable to the national Standard. With the tests of dynamic calibration using shock tube, we could get the time response of the sensor to be calibrated. Then we take this response as the output and pressure step which is calculated from ideal gas theory as the ideal input. The transfer function is then calculated point by point and is defined as the ratio of the Fourier transform of the output to the Fourier transform of the input. We use this method to calibrate pressure sensors in CIMM shock tube and obtain remarkble results.

Keywords

dynamic calibration, pressure sensor, shock tube, transfer function

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IMEKO-TC16-2017-001.pdf

DOI

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IMEKO TC

TC16 - Pressure and Vacuum Measurement

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