高精度铂电阻传感器监测装置的研制  

Development of a High-precision Platinum Resistance Sensor Monitoring Device

作　　者：荣宏伟 RONG Hongwei(Nuclear Industry Physical and Chemical Engineering Research Institute,Tianjin 300180,China;National Key Laboratory of Particle Transport and Separation Technology,Tianjin 300180,China)

机构地区：[1]核工业理化工程研究院,天津300180 [2]粒子输运与富集技术全国重点实验室,天津300180

出　　处：《自动化与仪表》2024年第7期101-104,109,共5页Automation & Instrumentation

摘　　要：针对工程现场Pt100铂电阻测温系统存在设计成本高、测量准确性差以及易受现场复杂电磁环境干扰等问题,研制了一种集Pt100铂电阻传感器信号采集、处理、传输于一体的数据监测装置,包括信号处理模块、模数转换模块、主控模块和通讯模块。通过分立元器件搭建信号处理电路,将Pt100铂电阻传感器输出信号转换为基准电压信号,输入到模数转换模块,主控模块通过并行接口读取模数转换模块发送的数据,并通过通讯模块完成数据传输。同时通过对被测信号建模与仿真分析,设计了一种高精度信号补偿算法,通过对被测信号全量程滤波、标定与修正,降低了环境工况对温度测量的影响。试验表明,装置具备铂电阻温度实时监测功能,且准确性高、设计成本低,可替代工程现场温度采集设备,实现规模化应用。A data monitoring device that integrates signal acquisition,processing,and transmission of Pt100 platinum resistance sensor has been developed to address the issues of high design cost,poor measurement accuracy,and susceptibility to complex electromagnetic environment interference in the engineering site Pt100 platinum resistance temperature measurement system.It includes a signal processing module,analog-to-digital conversion module,main control module,and communication module.By building a signal processing circuit with discrete components,the output signal of the Pt100 platinum resistance sensor is converted into a reference voltage signal,which is input to the analog-to-digital conversion module.The main control module reads the data sent by the analog-to-digital conversion module through a parallel interface,and completes the data transmission through the communication module.At the same time,a high-precision signal compensation algorithm was designed through modeling and simulation analysis of the measured signal.By filtering,calibrating,and correcting the full range of the measured signal,the impact of environmental conditions on temperature measurement was reduced.The experiment shows that the device has the function of real-time monitoring platinum resistance temperature,and has high accuracy and low design cost.It can replace temperature collection equipment in engineering sites and achieve large-scale application.

关 键 词：PT100 补偿 监测 修正 准确性 成本 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]