电力开关柜用温湿度控制设计.doc

电力开关柜用温-湿度控制器设计 摘要 为了有效地控制电力开关柜内部的温湿度，防止开关柜整体的绝缘性降低，本论文设计了一种基于单片机开发的的实用型温湿度控制仪。主要是通过对电力开关柜内的温度及湿度的监控，使柜内的温湿度不超过电力器件安全工作的温湿度值，从而大大提高了电力系统工作的安全性和可靠性。文中采用结露传感器HDP-07测量柜内环境湿度值,以及采用DS18B20测量柜内环境温度值，并将测量值与预先设定的值进行比较，根据具体比较结果来输出控制风扇和加热器工作。实验结果表明，系统工作稳定正常，测量精度满足了设计要求。文中介绍了系统工作原理及硬件和软件设计，并给出了一定量的实验数据。本设计稍做修改，就可以应用在其他场合，如：仓库及药房等。 关键词：电力开关柜；温度测量；湿度测量；单片机 Design of Temperature-Humidity Controller for Power Switching Equipment ABSTRACT In order to control temperature and humidity in power switching equipment dffectively and avoid decreasing insulativity of power switching equipment,an applied temperature and humidity controller based on a single chip micro-computer is presented in this paper.The system are mainly through the temperature sensor DS18B20 and humidity transducer HDP-07 to detect temperature and humidity in power switching equipment. Through its SCM control system to control fan and heater as the comparison result of temperature and humidity, which ensure the normal operation of power switching equipment,and improve the safeness and reliability of power switching equipment. The experimental results show that the monitor system can work nor,and meet the accuracy requirements of system measurement. the principle of the monitor system,hardware and software are presented in this paper. The testing data of the circiut is given in this paper. The circuit is usefull and is very easy to be modified and migrated to various other places such as warehouses, pharmacies. Key words: Power switching equipment; Temperature;Humidity;Sensor; SCM 目 录 1 绪论 1 2 系统的总体设计 2 2.1元件选择 2 2.2硬件总设计 3 2.3软件总设计 3 3 系统主要硬件电路设计 4 3.1 稳压电源的设计 4 3.2 温度和湿度数据采集单元电路 .................................... 5 3.2.1温度数据采集单元 5 3.2.2湿度数据采集单元 7 3.3 单片机电路 11 3.4显示电路 12 3.5 系统电路原理图及PCB板图 12 4 软件设计 13 4.1 程序编译软件 13 4.2 程序流程图 14 5 整机调试及实验结果 16 6 结束语 22 参考文献 23 致 谢 24 附录A硬件实物图 25 附录B总电路原理图及PCB板图 26 附录C程序清单 27 1 绪论 在输变电系统中，电力开关柜的可靠性直接影响供电系统的安全性和可靠性，一般电力开关柜主要是由一次元件断路器、开关、互感器等以及二次保护控制元器件组成，显然，开关柜内温度和湿度影响着设备的绝缘性。电力电子器件本身