应变片检测方法的低通特性  

The Characteristics of Low Frequency of Strain Gages Detecting Method

作　　者：张弛 

机构地区：[1]南京理工科技园股份有限公司,江苏南京210094

出　　处：《南京工程学院学报（自然科学版）》2013年第1期44-47,共4页Journal of Nanjing Institute of Technology(Natural Science Edition)

基　　金：江苏省高校科研成果产业化推进工程项目(JHZD2012-6)

摘　　要：对应变片检测方法的动态特性进行研究,了解其获得试件高频率域动力学特性的可行性.通过建模并定性分析,表明应变传感器系统具有低通特性.比较由试验获得的振动加速度传感器信号和应变传感器系统信号在时域、幅值域、频域三域中的差异,证明应变传感器系统具有低通特性.因此,使用应变传感器系统检测高频动态信号,高频信息将被衰减,大部分频谱信息将被丢失.In order to investigate the feasibility of obtaining dynancs peculiarity in high frequency domain, the dynamic performance of the method used to detect strain gages is studied. The modeling and analysis show that the strain gages sensor system is characterized by low frequency. This characteristic is proved through the omparisons of the signal differences, obtained from the experiments, between vibration acceleration sensor and strain gages sensor system in three domains, i.e. time, amplitude and frequency. Consequently, the high frequency information is attenuated and the majority of the spectrum information is lost when high frequency dynamic signal is detected by using the strain gages sensor system.

关 键 词：测试技术与仪器 应变片检测 低通特性 建模 试验 

分 类 号：U467.4[机械工程—车辆工程]