摘要
针对当前铂电阻温度采集系统中存在的不能有效减小测量误差、现场接线可靠性低以及不能准确进行故障诊断等问题,设计了一种具备自诊断功能的四线制高精度铂电阻温度采集系统,包括铂电阻温度传感器、自诊断及标定模块、恒流源和电压采集模块。利用MATLAB软件对采集系统进行了建模与仿真分析,同时搭建了硬件电路并进行实物测试。仿真和实物测试结果表明,该温度采集系统不仅能够极大改善线路电缆误差和器件一致性误差问题,而且能够实现在线路发生断线故障时及时准确的对故障进行自诊断定位,能够大幅提升温度智能化诊断检测水平。
The current platinum resistance temperature acquisition system exists some drawbacks,including cannot effectively decrease the measurement error,low reliability field wiring and inaccurate fault diagnosis.The paper designs a high precision four-wire platinum resistance temperature acquisition system which has the self-diagnosis function.It includes platinum resistance temperature sensor,self-diagnosis and calibration module,the constant current source and voltage acquisition module.Each function module of temperature acquisition system has been modeled and simulated by MATLAB software.The hardware circuit was built and practical test was carried out.The simulation and experimental results show that the temperature acquisition system can not only improve the problem of line cable and device consistency errors,but also can timely realize the broken-line fault occurred in the line because of the inaccurate diagnosis to fault location.The temperature acquisition system can greatly enhance the level of intelligent temperature diagnostic test.
作者
吕阳
刘莉娜
郑良广
侯晓伟
LV Yang;LIU Lina;ZHENG Liangguang;HOU Xiaowei(CRRC Transducer Measurement Technology R&D Center,Ningbo CRRC Times Transducer Technology CO.,LTD.,Ningbo Zhejiang 315021,China;Hunan Automotive Engineering Vocational College,Zhuzhou Hunan 412001,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2020年第5期774-778,共5页
Chinese Journal of Sensors and Actuators
基金
国家重点研发计划资助项目(2016YFB1200401)
宁波市工业重大科技专项攻关项目(2017B10017)。
关键词
铂电阻
高精度
四线制
温度采集
仿真
自诊断
platinum resistance
high precision
four-wire system
temperature acquisition
simulation
self-diagnosis
