Y6DL-3型动态电阻应变仪小信号的测量研究  

Research on the measurement of small signal in Y6DL-3 dynamic resistance strain gauge

作　　者：张春辉[1] 王时英[1] 李向鹏[1] 

机构地区：[1]太原理工大学机械工程学院,太原030024

出　　处：《仪器仪表用户》2012年第1期64-67,共4页Instrumentation

基　　金：山西省工业科技攻关计划项目(20080321048)

摘　　要：Y6DL-3型动态电阻应变仪采用交流供桥、载波放大的型式,但在使用中该应变仪中的LCπ型滤波器没有将载波信号完全滤掉,影响了小信号的测量。针对上述实际情况,利用滤波器设计软件Filterlab2.0设计了一个四阶巴特沃斯有源低通滤波器,将其应用在Y6DL-3型动态电阻应变仪中,实验结果表明:所设计的滤波器可以有效抑制载波信号,提高信噪比,得到了理想的滤波效果。为解决同类仪器中的信号干扰问题提供了一种很好的思路和方法。The type of AC（Alternating Current） bridge and carrier amplification were used in Y6DL-3 dynamic resistance strain gauge.The carrier signal was not filtered out by theπtype filter in the dynamic resistance strain gauge completely.The measurement of small-signal would be affected by the carrier signal.In view of the above practical situation,a Butterworth low-pass active filter was designed based on the Filterlab2.0 software.Then it was made and applied in the dynamic resistance strain gauge.The results show that： The filter can restrain the carrier signal and enhance the signal-to-noise effectively and get the good effect.An effective method was offered for the solution of the signal disturb problems in similar electronic instruments.

关 键 词：动态电阻应变仪 载波信号 Filterlab2.0软件 有源低通滤波器 

分 类 号：TH823[机械工程—仪器科学与技术]