说明：  1.传感器：Pt100铂热电阻 2.测量放大器：自己设计与搭建 3.被控对象：400W电热杯，约0.5公斤自来水 4.执行机构：12V驱动，5A负载能力的继电器 5.控制系统：51单片机 6.控制算法：PID 7.温度范围：环境温度~100度 8.测量误差1度，控制误差2
(1. sensor: Pt100 platinum thermal resistance 2. measurement amplifier: its own design and construction 3. controlled object: 400W electric cup, about 0.5 kilograms of tap water 4. actuators: 12V driven, 5A load relay 5. control system: 51 single chip microcomputer 6. control algorithm: PID 7. temperature range: ambient temperature ~100 degree 8. measurement error 1 degree, control error 2 degree)