基于单片机煤矿供电系统的保护（毕业设计论文）.doc

摘要 单片微型计算机简称单片机。它是把组成微型计算机的各功能部件：中央处理器、CPU、随机存取存储器RAM、只读存储器ROM、I/O接口电路、定时器/计数器以及串行通信接口等制作在一块集成芯片中，构成一个完整的微型计算机。单片机主要应用于控制领域，由于其具有可靠性高、体积小、价格低、易于产品化等特点，因而在智能仪器仪表、实时工业控制、智能终端、通信设备、导航系统、家用电器等自控领域获得广泛应用。本设计采用单片机对进行控制，通过IO口输出的具有时序的方波作为控制信号，关键词：单片机Abstract Single chip computer chip referred to. It is composed of the microcomputer functional components: the central processor, the CPU, random access memory (ROM, RAM and read-only memory I/O interface circuit, timer/counter and serial communication interface chip in a piece of integration, constitute a complete micro computer. SCM is mainly applied to control field, since it has high reliability, small volume, low price, easy to prod in intelligent instrument, industry control, real-time intelligent terminals, communication equipment, navigation, household appliances automation field widely used. In coal mine production in coal mine, the power system protection relay protection device is used mostly, along with the computer technology, microelectronics technology, information technology, network communication technology unceasing development, intelligent protection system has been developed successfully in hardware, data processing, using powerful ability of DSP microprocessor, low-power programmable logic chips and high integration of special-purpose chip, make whole system reliability has greatly improved, so as to ensure the quality of production. This design USES the monolithic AT89C51 for \ D converters, D/A converter I \ control, through the mouth of output is temporal O the torque-current as control signal, collecting, processing, and according to the signal processing results issued corresponding control signal and display alarming. Keywords: MCU ；A \ D converters；D/A converter 目录 摘要 I Abstract II 1绪论 1 1.1引言 1 1.2煤矿供电系统保护概述 1 1.3 PROTEL简介 4 1.3.1 PROTEL的发展 4 1.3.2 PROTEL99的组成及主要特色 4 1.3.3 PROTEL存在的问题 6 1.3.4 PROTEL 99SE的特点 6 1.4煤矿供电系统保护框图 7 2控制系统的硬件电路的设计 9 2.1方案简介 9 2.2硬件电路设计 11 2.2.1单片机简介 11 2.2.2互感器 18 2.2.3 整