基于PSpice的温度传感器现场核查数据异常研究  

Research on Abnormal Temperature Sensor Data in Field Verification Based on PSpice

作　　者：崔学林 梁宝龙[2,3] 匡昌武 李哲[1,3] CUI Xuelin;LIANG Baolong;KUANG Changwu;LI Zhe(Hainan Meteorological Exploration Center,Haikou 570203,China;Wuzhishan Meteorological Bureau of Hainan Province,Wuzhishan 572200,China;Key Laboratory of South China Sea Meteorological Disaster Prevention and Mitigation of Hainan Province,Haikou 570203,China)

机构地区：[1]海南省气象探测中心,海口570203 [2]海南省五指山气象局,五指山572200 [3]海南省南海气象防灾减灾重点实验室,海口570203

出　　处：《自动化与仪表》2024年第7期137-141,共5页Automation & Instrumentation

基　　金：海南省自然科学基金资助项目(422RC804,422MS151)。

摘　　要：针对在多次现场核查中各温度传感器和标准器测得值普遍比设定值上浮0.5℃~1.0℃左右的异常现象,通过原因分析和仿真软件PSpice绘制仿真电路,对比串联单点接地和并联单点接地电位的不同。利用不确定度理论,建立数学模型,分析测量结果的不确定度来源,对各不确定度分量进行计算并计算出各分量所占总不确定度比例。结果表明,核查装置引入的扩展不确定度为0.15℃,通过不确定度分析排除测量设备的不确定因素影响,得出地环路干扰对数据有影响的结论,影响程度高达47%。In response to the abnormal phenomenon that the measured values of the temperature sensors and standard devices generally rose by about 0.5℃~1.0℃above the set value in the field verification,PSpice software was used to draw simulation circuit to compare the difference of grounding potential between series single point grounding and parallel single point grounding.The mathematical model was established by using uncertainty theory.The sources of uncertainty were point out which infect the measurement results.Each component of uncertainty and its proportion of the total uncertainty were calculated.The results show that,the extended uncertainty introduced by the verification device was 0.15℃.After carrying out uncertainty analysis to exclude the influence of measuring devices,it is concluded that the interference of ground loop has an impact on the data,with an impact degree of up to 47%.

关 键 词：现场核查 地环路 气象计量 不确定度 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] P412.1[自动化与计算机技术—计算机科学与技术]