The dynamic compensation of temperature sensors in sonic nozzle airflow standard facilities based on method of positive pressure

Pt-resistance temperature sensors are very often used in gas-supply systems, and the sonic nozzle airflow standard facilities are no exception. In order to improve dynamic response of Pt thermal resistances and obtain the detailed variation of temperature in pipeline and stagnation tank of airflow standard facility, a realization technique of the temperature compensation, using the model of heat transfer to acquire regularity of temperature change, solving the actual model of Pt thermal resistances and parameters of inverse model by particle swarm optimization algorithm and wavelet filtering algorithm, has been presented in detail. The experimental and simulation results demonstrate the correctness and effectiveness of this compensation method.