WiFi无线传输的薄膜热电偶温度采集系统设计  

Design of Thin-film Thermocouple Temperature Acquisition System with WiFi Wireless Transmission

作　　者：崔云先[1] 谢英男 殷俊伟[1] 米嘉兴 CUI Yun-xian;XIE Ying-nan;YIN Jun-wei;MI Jia-xing(College of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《仪表技术与传感器》2023年第3期58-64,共7页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(52175379)。

摘　　要：为了解决现有丝状热电偶温度数据采集系统的采样频率和传输速率低、传输方式不灵活、不适用于薄膜热电偶的问题,文中设计了一种采用WiFi无线网络作为数据传输方法、提高采样速率并引入非线性补偿方法的K型薄膜热电偶无线温度采集系统。实验结果表明,该系统能够在0~650℃的量程内对K型薄膜热电偶进行瞬态温度测量,最大采样率为100 kHz,温度分辨力为0.16℃,非线性补偿后的测量精度达到0.2级。幅频特性测试结果表明,该系统可对最高频率分量为25 kHz的瞬态温度信号进行测量。In order to solve the problems of low sampling frequency and transmission rate,inflexible transmission mode,and insuitable for thin-film thermocouples in the existing filament thermocouple temperature data acquisition systems,this paper designed a K-type thin-film thermocouple wireless temperature acquisition system that used WiFi wireless network as a data transmission method,improved the sampling rate and introduced a nonlinear compensation method.Experimental results show that the system can make transient temperature measurements on K-type thin-film thermocouples in the range of 0~650℃,with a maximum sampling rate of 100 kHz,a temperature resolution of 0.16℃,and a measurement accuracy grade of 0.2 after nonlinear compensation.Amplitude-frequency characteristic test results show that the system can measure transient temperature signals with a maximum frequency component of 25 kHz.

关 键 词：薄膜热电偶 数据采集系统 嵌入式系统 工业互联网 

分 类 号：TH811[机械工程—仪器科学与技术]