微弱电流的I-V变换测量方法研究  

The Research on I-V Convertor for Low-Level Current Measurement

作　　者：倪宁[1,2] 肖雪夫[1] 葛良全[2] 高飞[1] 张力[1] 

机构地区：[1]中国原子能科学研究院,北京102413 [2]成都理工大学,成都610059

出　　处：《核电子学与探测技术》2013年第6期665-669,共5页Nuclear Electronics & Detection Technology

摘　　要：微弱电流信号具有极低的幅度，极易受到外界的干扰，测量难度较大。论文介绍了微弱电流I—V变换方法，分析影响I—V变换方法测量下限与测量精度的关键因素，I—V变换的等效型电路T型网络及优缺点，设计了宽量程（10^-15-10^-8A）高精度的静电计电路，并对所设计的静电计电路进行了实验测试。测试结果表明，该静电计电路具备较高的测量下限与测量精度，能够满足现场校准高气压电离室的使用需求。Low - level current signal is extremely weak and is easily disturbed. The I - V convertor for low - level eurrent measurement is introdueed. The basic theory of I - V conversion and key factors that influence the performance of I -V eonvertor are analyzed. With I -V eonversion theory,a wide range （10^-15 - 10^-8A） electrometer is designed and tested. According to the test results of the eleetrometer, it fulfills the needs of the high pressure ion chamber （HPIC） which is used in the situation of calibration.

关 键 词：I—V变换 微弱电流测量 静电计 高气压电离室 

分 类 号：TM933.1[电气工程—电力电子与电力传动]