大容器水沸腾换热实验台信号抗干扰技术研究

The Research on Signal Santi-jamming Technique of the Experimental Syetem of Large Container Water Boiling Heat Transfer System

介绍了大容器水沸腾换热实验台的工作原理。分析了数据采集系统中热电偶毫伏级微信号在数十安培大电流下受到的干扰机理,提出了电源隔离、差分输入以及选用抗干扰器件等方法,对信号干扰进行了有效抑制,确保了测试数据的准确性和可靠性。

Working principle of the experimental syetem is described.The jamming mechanism of the data acquisition system for thermocouple was analyzed which is millivolt micro signal in the environment that containing dozens of ampere current and the method that power supply isolation,differential input,selecting anti-interference device and so on were propesed,to suppress interference effectively,so that accuracy and reliability can be guaranteed.