课程设计是基于CU50传感器和STC89C51单片机的智能测温仪表。智能测温仪表电路主要由STC89C51单片机、按钮、数码管、LED显示、串行通信接口、电源、ADC、E2PROM等电路组成，其以51单片机为核心控制部件，利用CU50阻值随温度变化的特点，将其和其他三个电阻构成非平衡电桥，因而，温度的变化可转化成电桥输出微弱电压信号的变化，电压信号经集成运放电路放大后送到A/D转换器，将模拟信号变换成数字信号。单片机根据输入量和设定量进行运算，将结果送到数码管显示，完成对温度的测量。-Curriculum design is based on the CU50 STC89C51 of Intelligent Sensor and Thermometer. Intelligent Thermometer circuit mainly by STC89C51 SCM, buttons, LED, LED display, serial communications interface, power supply, ADC, E2PROM and other circuit, the MCU as the core control 51 component, the use of CU50 characteristics of resistance varies with temperature , and the other three resistors to form non-balanced bridge, and therefore, the temperature change can be converted into a weak bridge output voltage signal change, the voltage signal amplified by the integrated operational amplifier circuit and sent to A/D converter, the analog signal converted into digital signals. Microcontroller to set the input volume and the amount of the operation, the results sent to the digital display, complete temperature measurement.