开关柜温度检测系统毕业实习设计报告.docVIP

（ 二 〇 一 年 六 月 摘 要 近年来，随着发电厂自动化、信息化建设步伐的加快，对控制发电机组运行的一系列开关柜触头温度的在线监测应运而生，并在企业生产中发挥着越来越重要的作用。它的应用可以提高电网运行的可靠性与安全性,促进电网现代化技术的完善与发展。该系统实现了对高压开关柜内多个带电触点进行温度的实时监测，当触点温度超过温度上限时，系统发出报警信号。 本文介绍了一种开关柜温度监测系统，在整个设计过程中，分别从硬件和软件两个方面描述，即从硬件电路的设计到实现所要求功能的软件设计。在系统的硬件电路设计中，将单片机AT89C51作为系统的核心，采用温度传感器PT100对温度信号进行采集，采用模数转换器ADC0809进行模数转换,采用LED数码管实时显示温度值。硬件电路主要包括传感器电路、模数转换电路、单片机电路、显示电路、报警电路等。在系统的软件设计中，采用了模块化结构，主要包括主模块、数据采集模块、数据处理模块、报警模块、显示模块等。该系统具有成本低、可靠性好、安全实用等特点。 关键词：开关柜；温度监测；单片机；PT100 Abstract Recently, along with electric power production enterprise’s automation and information construction developing faster, all kinds of new temperature monitoring systems appear and play an important role in production．The application in electric power distribution system can improve the operation reliability and safety of power system. This system can do monitoring of temperature of several contacts inside the high voltage switch cabinet in real-time, when the temperature of contacts is beyond the upper limit of the temperature, the system will alarm. In this paper, a temperature monitoring systems of switchgear is designed．During the whole designed process, this paper describes the process of designing from two respects; hardware and software. In another word, the paper describes the process from the circuit designing to the software designing of realizing the demanded functions. In the circuit designing of the system, the system take the AT89C51 as the core, use the temperature sensor of PT100 to acquire the temperature signal, use the ADC0809 to change Analog into digital, use LED to display the temperature. The hard circuit is structured by temperature testing sensor circuit, A/D switch circuit, Microcontroller circuit, displaying circuit, alarming circuit. The design of software in this system adopts module structure. It is mainly about main module structure, data acquisition module structure, data processing module structure, alarming module structure, displaying modu