Abstract:According to the requirement of the gas medium dynamic temperature calibration, a set of gas-dynamic temperature calibration devices based on the shock tube principle is developed. In terms of the issue that the temperature sensors cannot be excited by the shock tube due to the short duration of the shock wave, the traditional structure of the shock tube is reformed in this article. As a result, the continuous flow with the steady temperature after the shock wave procedure is realized, and the effective excitation problem of the sensor is solved. To realize the high-quality dynamic calibration for the rapid response temperature sensors, the impact of temperature amplitude instability on the dynamic calibration results is reduced by the research of temperature amplitude compensation technology during the shock wave procedure. In addition, through the analysis of the influence of shock wave unsteady boundary layer on the temperature, the condition of ignoring the change of temperature with wall parameters is obtained, which improves the reliability of excitation signal generation. In the end, the traceability of the calibration device is analyzed and evaluated with the experiments, which shows that the proposed gas dynamic temperature calibration device can generate the temperature excitation signals with the step rise time of 1. 6 ms, a steady step amplitude of 320℃ , and duration of 40 s, which satisfy the dynamic calibration requirements of the temperature sensors.