针对变电站各发热点温度测量和监控问题,提出利用红外技术对现场设备进行温度监控的设计方案.该方案利用电力设备本身的高温与自然环境的温度差进行温差发电,为安装在现场的测温传感器供电;发射端把测温传感器测得的温度量转化为红外信号并发射;接收端的红外监控摄像机对传感器扫描接收;监控中心对提取的红外图像处理、分析后,给出温度指示和异常报警信号.LabVIEW编写的软件界面进行实时监控,做到各被测点的温度实时显示.用红外摄像机代替昂贵的红外热像仪,通过实际检验,所设计的方案获得满意的效果.%A temperature monitoring scheme based on infrared technology is put forward for the field devices of substation, which makes use of the temperature difference between operating device and environment for the power supply of site temperature sensor. The transmitter transforms the measurement of temperature sensor into infrared signals, which are scanned by the infrared camera of receiver. The monitoring center system processes the received signals, displays the temperatures and issues alarm for abnormality. The software interface programmed with LabVIEW displays the temperatures of all measuring points in real time. The expensive thermal infrared imager is replaced by the infrared camera and site test proves its satisfying effect.
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