基于单片机的培养箱温湿度数字解耦控制系统设计  

Design of Temperature and Humidity Control System for Incubator Based on AT89S51 Microcontroller

作　　者：吴兴纯[1] 吴瑞武[1] 杨燕云[1] 

机构地区：[1]云南农业大学基础与信息工程学院,650201

出　　处：《计算机测量与控制》2012年第2期371-373,共3页Computer Measurement &Control

摘　　要：针对培养箱温、湿度控制过程具有时变、非线性、参数强耦合等特点,提出基于系数解耦的数字PID培养箱温、湿度控制方法;文章采用AT89S51单片机为主控芯片、温度传感器AD590、湿度传感器IH3605为检测元件设计了一个温、湿度解耦控制系统,实现了培养箱温、湿度的实时控制与测量;实验和经验表明,该系统自适应能力强,控制精度高;经实验对比测试,系统温度绝对误差可控制在0.2℃、湿度绝对误差可控制在2%RH范围内,满足了培养箱温、湿度高精度控制要求。Aiming at the problems of the time-varying,nonlinearity and uncertainty of parameters,the method based on decoupling and PID control was investigated in Temperature and humidity Control System for incubator.The system of decoupling and PID controller adopted AT89S51 microcontroller,AD590 to examine temperature and IH3605 to examine humidity.And the system would detect and control actual temperature and humidity.The results showed that this temperature control system has the characteristics of static accuracy,adaptability,and reliability.The actual results show the temperature accuracy could be controlled within 0.2℃ and humidity accuracy could be controlled within 2%RH and good effects of temperature achieved by this controller.

关 键 词：单片机 温度 湿度 PID控制 解耦控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]