综合管廊内电缆附件无线红外测温系统设计

针对综合管廊中电力电缆设备,以电缆终端或接头处作为温度监测目标,应用红外测温技术和无线通信技术,以STM32低功耗单片机为主控芯片,利用TMP007完成电缆红外温度测量,通过低成本串口WIFI模块ESP8266组成多节点网络并实现无线通信功能,研究设计了一套数字温度监测系统。试验结果表明,该温度监测系统测量误差在0.5℃以内,能够实时监测被测物体温度变化,可为综合管廊内电缆安全运行与火灾预防提供数据支撑。

Design of Wireless Infrared Temperature Measuring System for Cable Accessories in Comprehensive Pipe Corridor

Although the comprehensive pipe corridor could save urban land resources and beautify urban landscape,there were many pipelines in the pipe corridor,and the cause of fire was complex.Among them,the cable fire caused by excessively high temperature in the cable accessory was the most serious.Therefore,it was necessary to design a reliable temperature measurement system for cable accessories and to monitor the temperature of cable terminals or intermediate joints.This paper presented a wireless infrared temperature measuring system for power cable in the comprehensive pipe corridor based on infrared temperature measuring and radio frequency communication technology.This system used STM32 as the development platform,used TMP007 infrared temperature sensor to collect cable temperature,transmitted data of each temperature measuring node to the data management center through ESP8266 wireless module,and finally transferred the data of the management center to the server through RS485 bus,realizing the functions of multi-node temperature collection and wireless data transmission.It was verified by experiments that the measurement error of the temperature monitoring system was within 0.5 K,which could monitor the node temperature in real time,and provide guarantee for the safe operation and fire prevention of power cables in the comprehensive pipe corridor.