使用温度传感器为 PT100,这是一种稳定性和线性都比较好的铂丝热电阻传感器,可以工作在 -200℃ 至 650℃ 的范围.本电路选择其工作在 -19℃ 至 500℃ 范围.

整个电路分为两部分,一是传感器前置放大电路,一是单片机 A/D 转换和显示,控制,软件非线性校正等部分.-Temperature sensor PT100, which is a relatively good stability and linearity are platinum wire RTD sensors can work in-200 ℃ to 650 ℃ range. The circuit to choose their work in the range of-19 ℃ to 500 ℃ The whole circuit is divided into two parts, one sensor preamplifier circuit, first single-chip A/D conversion and display, control, software and some other non-linear correction.