基于声发射理论的阀门气体内漏量化检测研究

通过理论分析和实验研究的方法,建立阀门内漏过程中气体体积泄漏率与声发射信号特征参数均方根(AERMS)量化关系。利用研制的实验平台对阀门气体内漏进行检测实验,并探讨了泄漏率、阀门类型等参数对声发射信号特征参数均方根的影响。实验表明阀门发生气体泄漏时产生的声发射特征信号参数均方根能有效反应气体体积泄漏率,且声发射检测技术对阀门泄漏率检测误差在10%以内,因此可以利用声发射技术检测阀门是否内漏并估算其泄漏率。

The quantitative detection of valve internal air leakage based on acoustic emission theory

The objective of this paper is to establish the quantitative relations between the valve internal air leakage rate and the root mean square of characteristic parameters of acoustic emission signal ( ). AE testing for valves internal air leakages under test platform was performed to detect and the factors such as the valve internal leakage rate and the valve type were discussed about the effects on AERMS. It is clearly demonstrated that the volume of air leakage rate was successful detected using AERMS, and the max measurement error of acoustic emission detection technology within 10%，therefore the acoustic emission detection technology can be used for the detection of valve internal air leakages.