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在钻井试验装置中,我们研制了一种测量放大器,主要用于小信号的测量放大。在采用应变电阻测量方法分析装、载、运机械的受力情况时,它可以代替动态电阻应变仪对其信号进行测量放大;在冻结法凿井中用热电偶测温时,其输出的微伏信号可以放大成毫伏级信号,以便于进行数据处理;在钻井刀具试验台中,该放大器放大拉、压力传感器的应变信号后去推动其他仪表。在工程测量中经常把位移、速度、力、流量、热量、光通量、酸碱度等非电量,通过传感器转变成微弱电信号后,用该放大器进行放大。由于该放大器输出极设有电流扩大装置,故可以直接驱动继电器、仪表、记录仪等具有一
In the drilling rig, we have developed a measurement amplifier that is mainly used for measuring and amplifying small signals. In the use of strain resistance measurement method for loading, loading, transporting mechanical stress situation, it can replace the dynamic resistance strain gauge to measure the signal amplification; thermocouple in the freezing method wells, the output of micro-volts The signal can be amplified to millivolt level signal for data processing; in the drilling tool test stand, the amplifier to amplify the strain gauge signal of the pressure sensor to promote other instruments. In engineering surveying, displacement, velocity, force, flow, heat, luminous flux, pH and other non-electricity are often converted into weak electric signals by the sensor and then amplified by the amplifier. Since the amplifier output pole with a current expansion device, it can directly drive the relay, instrumentation, recorders, etc. have a