【作者】 刘钊； 储诚胜； 迮仁德； 丁阁； 曾军；

【Author】 LIU Zhao,CHU Cheng-sheng,ZE Ren-de,DING Ge,ZENG Jun (China Academy of Engineering of Physics,the Institute of Nuclear Physics and Chemistry,Mianyang 621900,China)

【机构】 中国工程物理研究院核物理与化学研究所；

【摘要】 针对中子背散射探雷样机的使用要求设计了四路中子信号采集的前置放大电路,中子探雷的前放电路是属于弱信号的放大技术,除了放大电路的放大倍数以外,信号的采集和耦合极其关键,前放电路的PCB板设计在微弱信号的放大技术上是保证电路的可靠性和降低电子学噪音的重要环节。本文通过实验和原理分析,阐述前放电路在设计和实现中的关键点和实验测试结果。性能测试结果表明设计电路板性能稳定,符合中子背散射探雷样机使用要求。更多还原

【Abstract】 This paper designed a four-channel pre-amplifying circuit for neutron signal acquisition to satisfy the demand of NBS landmine detecting prototype.This pre-amplifying circuit mainly solves the weak signals,so the acquisition and coupling of the signal are the key factors besides the amplification.The design of PCB for pre-amplifying circuit plays an important role in weak signal amplifying technology,because it can assume the reliability of the circuit and reduce the electronic noises.This paper tells the key points of the design and implementation of the circuit and some experimental testing results.The testing results showed that the circuit can work stably and well satisfy the demand of the NBS landmine detecting prototype.更多还原