Research on Small Signal Amplification Circuit of Downhole Instrument
会议名称：《2012 National Conference on Information Technology and Computer Science》
会议日期：2012年
学科分类：080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学]
基 金：supported by the State 863 Plan project(2007AA09080103 ) 2012 Youth Foundation of Southwest Petroleum University(No.2012XJZ021)
关 键 词：Microvolt signal Signal amplifier circuit Resistance strain sensor AD8552 Drilling engineering
摘 要：In order to acquire the real-time work of underground drill,promote the security and the reliability,it is necessary to effectively measure the drilling engineering parameter of drilling pressure,torque and side pressure *** uses the resistance strain sensor as a *** microvolt signal amplifier circuit is designed through analyzing the output signal of the resistance strain *** design is applied with high-precision and rail-to-rail OP AD8552 as the core chip in the microvolt signal amplifier *** experimental test,it is obtained with experimental data of amplifier ***,the data are processed and analyzed using MATLAB *** signal gain of the whole circuit is as high as 80dB,and the circuit has strong anti-interference ability and high temperature *** amplification to the signal above 1μV is good,which is satisfied with the parameter test system of drilling engineering.