文档介绍：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 information transmission between slaves and the master generates a munication packets based on MODBUS protocol to achieve real-time control.
Keyword: PIC16F877 microcontroller; M-BUS bus; software programming;
目录
摘要 I
ABSTRACT II
第一章绪论 1
1
(研究)内容 3
3
3
第二章系统总体结构方案设计 5
5
5
5
6
7
7
第三章系统的硬件设计 10
10
PIC16F877单片机特点 10
11
12
12
温度传感器接口电路 14
小结 14
14
15
接口电路 16
小结 18
18
18
接口电路 19
小结 19
19
20
LCD显示模块 20
LCD显示模块的选型 21
接口电路 21
小结 21
22
22
-BUS通讯模块 22
-BUS总线介绍 23
24
TSS721A芯片介绍 25