2、控制量，以合适的控制电压控制晶闸管的通断，最后由主电路控制取暖器发热功率。本文中涉及到的温度控制系统具有硬件组成简单，读数方便，精度高等优点，在实际工程中叶得到广泛应用。本软件系统能很好配合硬件系统完成各种功能，满足设计要求。关键词：移相触发；温度测量；温度控制；PID算法-..ABSTRACTThis paper introduces the heater temperature control system software design part. The system by a piece of 51 SCM, 4 * 4 matrix
3、keyboard, DS18B20 sensor, LCD1602 displays, DAC0832 chip, thyristor trigger circuit and single-phase bridge type half control of rectifier circuit. With AT89C51 single-chip microcomputer as the main control chip, the temperature sensor DS18B20 realize temperature detection, a
4、nd LCD1602 liquid crystal display shows detection to temperature, then with the keyboard input setting value comparison, then the PID algorithm is given control with the appropriate control the voltage control thyristor hige, finally by main circuit control heater heating pow
5、er. This paper involves in the temperature control system has the hardware composition is simple, easy reading, high precision of advantages, in the middle of the actual engineering used widely. This software system can be very good hardware system with finish all kinds of fu
6、nction and meet the design requirements.Keywords:phaseshiftingtrigger;Temperaturemeasurement;Temperaturecontrol;PIDalgorithm-..目录第一章绪论51.1背景51.2应用范围51.3研究状况51.4设计任务及要求6第二章系统的总体结构72.1总体设计思路72.251单片机7第三章软件设计部分103.1主程序设计103.2各模块子程序的介绍103.2.1键盘扫描处理流程103.2.2DS18B20温度传感器采样流程123.2.3
