基于单片机的实用型温度控制仪设计  

Design of a temperature controller based on microcontroller

作　　者：马英卓[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西省太原市030051

出　　处：《传感器世界》2012年第7期14-17,共4页Sensor World

摘　　要：为了达到快速、稳定的控温效果,以标准PT100热电阻作温度传感器,利用16位的模数转换器ADS1110实现高精度的A/D转换,选用STC89C51单片机为主控芯片,结合积分分段PID控制算法,通过调节PWM波的占空比控制双向晶闸管的导通,从而控制加热炉丝的平均加热功率,构成温度测量控制系统。经测试,该温控系统稳态精度可达0.5C,稳定时间小于42min。此温度控制仪电路易于实现,精度高、成本低,具有较强的实用性。To obtain a rapid and stable temperature control effect, a standard PT100 RTD is used as temperature sensor, High precision A/D conversion is realized by ADS1110 with 16bit conversion accuracy. The control center adopts STC89C51 MCU, combined with subsection-integrate PID control algorithm, to control the bidirectional triode thyristor by adjust duty radio of PWM waves so as to control the average heating power of furnace. The results show that the temperature control system can get a steady precision of 0.5℃ and the stable time less than 42 minutes. The temperature controller circuit is easy to implement with high precision, low cost and good practicability

关 键 词：温度控制 PID控制算法 PT100铂电阻 ADS1110 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]