一种基于电荷信号的远程在线自检单元的设计与应用

设计一种基于电荷信号的远程在线自检单元，为安装于核电厂反应堆厂房的松脱部件监测系统（LPMS）的一次仪表提供快速有效的远程在线自检方法。介绍了该远程在线自检单元的设计原理和方法、硬件设计与实现，以及软件流程设计。对远程在线自检单元进行了实验室测试，测试结果表明，在空载输出5 V低电压工作条件下可满足250 m的远程在线自检要求，同时对集成了该远程在线自检单元的国产化LPMS样机进行了鉴定试验，试验结果验证其满足工程应用环境。集成了远程在线自检单元的2套国产化LPMS产品已在巴基斯坦的恰希玛核电厂C-3/C-4机组进行了成功应用，以低成本和高效率实现了反应堆装料运行期间LPMS一次仪表的在线检测。 

Design and Application of a Remote Online Self-Checking Unit Based on Charge Signal

A remote online self-checking unit based on charge signal is designed to provide a fast and effective remote online self-checking method for the primary instrument of the Loose Parts Monitoring System (LPMS) installed in the reactor building of the nuclear power plant. The design principle and the method of the remote online self-checking unit, as well as the hardware design and software flow design are introduced. A laboratory test is conducted on the remote online self-checking unit, and the test result shows that the remote self-checking unit can meet the requirements of 250 m under the condition of no-load output 5 V voltage. Meanwhile, the domestic LPMS prototype integrated with the remote online self-checking unit is verified to meet the engineering application environment through the qualification test. Two sets of the domestic LPMS products integrated with the remote online self-checking units have been successfully applied in the C-3/C-4 unit of the Chashma Nuclear Power Plant in Pakistan. With low cost and high efficiency, the online self-checking function of LPMS primary instrument during the reactor loading operation is realized.