摘要
为解决核电厂安全级仪控系统部分应用中,阈值调节系统因电位器引起的系统精度变化过大的问题,开展了阈值调节系统优化设计,分析了其误差主要来源,提出了引入可调节低温漂电阻网络的优化设计方案。经理论计算,优化设计后电位器温度变化导致的系统最大精度误差减少至原系统的1/55,优于0.5%F.S。根据优化设计前后的方案,分别搭建了样件进行对比实验验证,优化设计后实测系统精度提高了至少40倍,0~55℃环境温度下实测精度优于0.1%FS。
In order to solve the problem that the system accuracy of the threshold regulating system in some applications of the safety level instrument control system in nuclear power plants changes too much caused by the potentiometer,which is implemented by hardware circuit,an improvement study on the threshold comparison scheme was carried out,the main sources of the error were analyzed,and an improvement scheme was proposed to introduce an adjustable low temperature drift resistance network.The theoretical calculation after the improvement shows that the maximum accuracy error of the system caused by the temperature change of the potentiometer is reduced by 55 times,and the accuracy is better than 0.5%FS.Furthermore,the circuit samples were set up for verification according to the scheme before and after improvement.After improvement,the system accuracy is improved by more than 40 times,and the measurement accuracy is better than 0.1%FS under the ambient temperature of 0~55℃.
作者
马文桂
何挺
王松
张影
杨有维
MA Wengui;HE Ting;WANG Song;ZHANG Ying;YANG Youwei(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu 610213,China)
出处
《核电子学与探测技术》
CAS
北大核心
2023年第4期665-669,共5页
Nuclear Electronics & Detection Technology
关键词
闭锁模块
阈值调节
误差来源
电位器
温度变化
locking module
threshold regulating
sources of error
potentiometer
temperature change
