Journal of Astronautic Metrology and Measurement ›› 2024, Vol. 44 ›› Issue (6): 64-68.doi: 10.12060/j.issn.1000-7202.2024.06.07

Previous Articles     Next Articles

Research on Dynamic Calibration Technology of Atomic-layer Thermopile Heat Flow Sensor

GUO Zicong1,LI Jianmin1,ZHAO Chengwen2,LIANG Haijian3,WANG Gao1,*   

  1. 1.School of Information and Communication Engineering,North University of China,Taiyuan 030051,China;
    2.Shanxi Jiangyang Chemical Co.,Taiyuan 030051,China;3.School of Software,North University of China,Taiyuan 030051,China
  • Online:2024-12-15 Published:2025-01-21

Abstract: The traditional dynamic calibration methods of heat flow sensors,such as the thermal wind tunnel method and the excitation tube method,can no longer adapt to the future demand for dynamic calibration of high-speed heat flow sensors,and there are problems such as small output heat flow,uneven heat flow,and single signal.Using a semiconductor laser as the heat flow source,the built dynamic test platform is capable of generating excitation signals such as step,pulse,square wave and swept sine.On time domain,using pulse signals for dynamic calibration of the sensor,the time constant was measured at a maximum of 87 μs,and the change of time constant is small when the pulse width changes within a certain range;on frequency domain,using a periodic square wave signal sensor for dynamic calibration,through the FFT(Fast Fourier Transform),the sensor and photodetector spectral characteristic curve to calculate the amplitude ratio is obtained and the normalization is carried out to get the frequency of its response at 2 160 Hz.

Key words: Heat flow sensor, Dynamic calibration, Time constant, Frequency of response

CLC Number: