【摘要】 设计了一种用于石油仪器的多极子阵列声波接收电路。这种电路由信号缓冲、信号合成、模式选择、两级带通滤波电路、程控衰减与放大电路等组成,它能把接收换能器接收到的信号组合形成单、偶极及四极子声波信号,从而实现对声波信号的接收、合成、滤波和程控衰减与放大。测试结果表明,这种电路简化了声系结构设计,放大和滤波功效显著,且干扰小,结构紧凑,升级灵活,扩展方便,控制简单,指标先进,比较适合高性能井下设备使用。更多还原

【Abstract】 An electronic circuit for multipole array acoustic logging receiver was designed for petroleum tools.This circuit consists of signal amortization,signal synthesizers,pattern selection,two stage bandpass filters and program-controlled attenuators & amplifiers.It can transduce the signals received by receiver transducer into monopole signals,dipole signals and quadrupole signals.So it can be used for receiving,composing and filtering of acoustic signals,as well as for program-controlled attenuating & amplifying of acoustic signals.With simplified structure design,it can receive monopole signals,dipole signals and quadrupole signals,and is effective in attenuating & amplifying signals with little signal interference.Moreover,with the feature of compact structure,it is flexible for upgrading,easy for interface extension,and simple for control.It shows excellent performance,and can find good application in high performance downhole tools.更多还原