气体脉冲压力的激光干涉法测量  

Laser Interferometry Measurement of Gas Pulse Pressure

作　　者：李博 王霞[2] 黄澄玉 张鹤宇 左睿奇 LI Bo;WANG Xia;HUANG Cheng-yu;ZHANG He-yu;ZUO Rui-qi(Changcheng Institute of Metrology&Measurement,Beijing 100095,China;School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;School of Materials Science and Engineering,Beihang University,Beijing 100091,China)

机构地区：[1]北京长城计量测试技术研究所,北京100095 [2]北京理工大学光电学院,北京100081 [3]北京航空航天大学材料科学与工程学院,北京100191

出　　处：《计量学报》2023年第9期1417-1422,共6页Acta Metrologica Sinica

基　　金：国家自然科学基金(51775526)。

摘　　要：对气体动态压力的非接触测量和溯源方法进行了研究。研制了基于激光干涉法测量气体脉冲压力的实验装置,通过光程与压力关系计算分析出气体脉冲压力的幅值和脉宽。建立了动态压力测量模型,并对测量不确定度进行了分析。开展了气体脉冲压力激光干涉测量实验,使用动态压力传感器和激光器进行同步测量,激光干涉法测量结果偏差较小,验证了装置测量的准确性。结果表明:本装置产生的脉冲压力信号稳定可靠,光学测量信号准确度高,具有实时性、非接触、可溯源等优点,可实现气体脉冲压力的测量,装置测量结果的相对标准偏差小于0.8%,测量结果的不确定度小于2%(k=2)。The non-contact measurement and traceability method of gas dynamic pressure were studied.A device based on laser interferometry for gas pulse pressure measurement was established.The amplitude and pulse width of pulse pressure were calculated by the relationship between optical path and pressure.The dynamic pressure measurement model was established,and the uncertainty of measurement was analyzed.Simultaneous measurement of gas pulse pressure with dynamic pressure sensor and laser interferometry.The deviation of comparison results was small,which verifies the accuracy of the device measurement.Experimental measurement of gas pulse pressure using laser interferometry was carried out,synchronous measurements using dynamic pressure sensors and laser was conducted.The deviation of the measurement results using laser interferometry is small,which verifies the accuracy of the device measurement.The results showed that the pulse pressure signal generated by the device is stable and reliable.The optical measurement signal has the advantages of real-time,non-contact,traceability and so on.The measurement of the gas pulse pressure can be realized.The relative standard deviation of the measurement is less than 0.8%,and the uncertainty of the measurement result is less than 2%(k=2).

关 键 词：计量学 气体脉冲压力 激光干涉法 动态压力 

分 类 号：TB935[一般工业技术—计量学]