脉冲式动态压力溯源方法研究

Research on Pulse Dynamic Pressure Tracing Method

动态压力测试在工业领域应用越来越广泛,可靠的校准技术是动态压力量值准确的保障,而溯源问题一直是制约动态压力校准技术发展的瓶颈。本文以基于激光干涉的可溯源动态压力测量方法为研究对象,针对液体脉冲压力的特点,建立基于牛顿第二定律的脉冲压力测量模型,对各影响因素引入的误差进行分析和测试,通过压力传感器校准试验完成激光干涉测量可行性验证和测量不确定度分析,实现脉冲压力的可靠溯源。

Dynamic pressure testing is more and more widely used in the industrial field,and reliable calibration technology is the guarantee of accurate dynamic pressure value.Traceability has always been the bottleneck of the development of dynamic pressure calibration technology.This paper takes the traceable dynamic pressure measurement method based on laser interference as the research object.According to the characteristics of liquid pulse pressure,a measurement model based on Newton’s second law is established,and the errors caused by various influencing factors are analyzed and tested.Through the calibration test of pressure sensor,the feasibility verification of laser interference measurement and the analysis of measurement uncertainty are completed.The reliable traceability of pulse pressure is realized.