温度测量仪设计

文档编号:ZD602 文档字数:20191,页数:40，有外文翻译，原理图，

 摘要
 本设计是以8051单片机系统为核心，用铂电阻使温度传感器对水轮发电机组的轴承温度、发电机定子绕组和铁心的温度、主变压器的温度等多点温度进行实时巡检，对温度进行实时采集，得到模拟信号，经过模数转换器将其转换为数字信号，并且要将其中的干扰信号去除，输入到单片机中进行处理，其结果不仅能在本地显示，而且可以利用单片机串行口通过RS-485总线及通信协议将采集的数据传送到主控机，进行进一步存档，处理。如果温度值超出限定范围，系统将进行声光报警，各检测单元能独立完成各自功能，从而加强对电站主要设备的安全监视，以保证设备的运行寿命和安全，提高水电站的安全运行水平。
 关键字：单片机，温度传感器，模拟信号，声光报警
 Abstract
 This design is 8051 microcontroller system as the core, with the platinum resistance temperature sensor on the hydro-generator group bearing temperature, generator stator windings and core temperature, the temperature of the main transformer, such as real-time multi-point temperature data logging, Real-time temperature of the collection, are analog signals, the ADC will convert them to digital signals, and which to remove the signal interference, entered into in the SCM process, the result will not only locally, but also SCM serial port through the use of RS-485 communication protocol and the data collected will be sent to Master control machine , further filing, processing. If the temperature exceeds limit the scope, the system will be sound and light alarm, the unit can detect independent of their respective functions, thereby strengthening the main power station equipment to the security and surveillance, to ensure that the operational life of equipment and safety, enhance the safe operation of hydropower station level.
 Keywords: SCM, temperature sensors，analog signals，sound and light alarm
 
  目 录
 
第 1章  绪论 1
1.1概述 1
1.2关于温度检测及水电站温度巡检国内外现状 3
1.3系统简介 4
1.4设计方案流程 4
第2章 温度传感器 6
2.1传感器简介 6
2.1.1传感器概述 6
2.1.2传感器组成 6
2.2 温度传感器选择的重要性 7
2.3温度信号获取与放大电路 8
2.3.1温度传感器的选择 8
2.3.2传感器接口电路 9
第3章硬件设计 11
3.1单片机选型 11
3.1 1单片机概论 11
3.1.2单片机外界电路 17
3.1 3声光报警电路 19
3.1.4数据存储和时钟电路 20
3.2稳压电源的设计 21
3.2.1稳压电源的组成 21
3.2.2电源设计 22
3.3模数转换单元 24
3.3.1 12位串行A/D转换器MAX187 24
3.3.2模数转换单元电路的设计 26
3.4通信模块设计 29
3.4.1 RS-485接口简介 29
3.4.2电路设计 30
3.4.3 通信协议的建立 31
3.5显示模块的设计 32
3.5.1 DM-162液晶显示模块 33
3.5.2DM-162与MCU接口电路 34
小结 36
参考文献 37
致谢 38

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