用于微层裂物质诊断的小型动量探针技术

Mini Momentum Probe Technique for Diagnosis of Micro-spall Fracture of Material

针对目前微层裂物质诊断技术的不足,设计了一种小型化动量探针。在传统动量传感器的基础上对传感界面和保护膜的测试结构进行改进,并结合数值模拟和联合实验诊断技术对小型化动量探针的测速结果数据进行解读。研究结果表明:改进后的动量探针可获取持续稳定的高质量信号,测试时长得到延长;小型化导致部分时段测速结果产生偏差,但第1速度峰值时刻之前的测速结果可信度高,可用于定量诊断微层裂物质空间密度分布。

A mini momentum probe is designed to diagnose the micro-spall fractures of material. On the basis of traditional momentum sensor,the structure of the sensing interface and protective film is improved,and the numerical simulation and joint diagnosis experiment technology are used to research the speed measurement results of mini momentum probe. Research result shows that the improved momentum probe can be used to obtain steady high quality signals,and the test duration can be extended; and the probe miniaturization leads to a deviation of measured speeds at some time intervals,but the measured speeds before the first speed peak time are credible,and can be used for the quantitative diagnosis of spatial density distribution of micro-spall fracture of material.