【毕业论文】SF6断路器微水在线监测仪系统论文.docVIP

PAGE l 兰州理工大学毕业设计说明书 - PAGE II - 摘 要 SF6断路器微水在线监测仪以PIC16F877单片机作为处理器，来实现实时监测SF6气体的温度、湿度及压力，从而得知断路器的运行状态。对由于SF6 气体本身原因引起的绝缘故障做出有效应对，进而保证电网的运行安全。 本次设计的SF6断路器微水在线监测系统的基本原理为：将湿度、温度、压力传感器通过连接器件连接到SF6气室，测量气室内SF6气体的湿度、温度、压力。所测模拟量送入PIC16F877单片机，通过A/D转换,数据分析，实施数据越限报警，并用LCD显示温度、压力以及湿度。下位机与上位机的通讯遵循MODBUS通讯协议，生成标准通信数据包。数据包通过M-BUS总线送入上位机，进行计算机实时监控。 关键字：PIC16F877单片机；M-BUS总线；软件编程； Abstract SF6 circuit breakers monitor online system uses the PIC16F877 microcontroller as a processor, to achieve real-time monitoring of SF6 gas’s temperature, humidity and pressure, and to kown the running state of circuit breakers so that people could effectively deal with the insulation fault caused by SF6 gas itself, and ensure the safty of the power supply system. In this design,the basic principles of SF6 circuit breaker can be summarized as that the humidity sensor, temperature sensor and pressure sensor are connected to the SF6 gas room by the jointer,which can survey the humidity, temperature, pressure of SF6 gas. the measured analog go through the A / D conversion, data analysis in the PIC16F877 microcontroller, to implement data overrun alarm and demonstrate temperature, pressure and humidity.The information transmission between slaves and the master generates a standard communication packets based on MODBUS protocol to achieve real-time control. Keyword: PIC16F877 microcontroller; M-BUS bus; software programming; 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc232851411 摘 要 PAGEREF _Toc232851411 \h I HYPERLINK \l _Toc232851412 Abstract PAGEREF _Toc232851412 \h II HYPERLINK \l _Toc232851413 第一章 绪 论 PAGEREF _Toc232851413 \h 1 HYPERLINK \l _Toc232851414 1.1选题背景 PAGEREF _Toc232851414 \h 1 HYPERLINK \l _Toc232851415 1.2主要设计（研究）内 容 PAGEREF _Toc232851415 \h 3 HYPERLINK \l _Toc232851416 1.3系统主要技术指标 PAGEREF _Toc232851416 \h 3 HYPERLINK \l _Toc232851417 1.4解决的关键问题 PAGEREF _Toc232851417 \h 3 HYPERLINK \l _Toc232851418 第二章 系统总体结构方案设计 PAGEREF _Toc23285141