89C51在变压器温度自动检测与控制中的应用

THE APPLICATION OF CHIP MICROPROCESSOR 89C51 IN TRANSFORMER AUTOMATIC TEMPERATUIE MEASUREMEND AND CONTROL

以单片机８９Ｃ５１为主的变压器温度自动检测与控制的系统实例，包括系统硬件及软件的设计。在设计中较详细地介绍了恒流源温度变送器的漂移设计方法、用浮点运算所采用的数学模型、消除连接温度传感器所用之导线引起的误差方法，对现场尖脉冲等干扰信号所采取的抗干扰对策。

This paper is about a case of an automatic transfoomer temperature controlling and measuring system with a chip microprocessor 89C51,mainly including the design of its softwear and hardwear.It introduces the drifting method in designing temperature conveyer of constant current source;the mathematic model of floating point calculation;the method of clearance of the error caused by the cable between temperature sensors;the method resisting the interference signal,such as the tip pulse,on the site;and so on.