溫度測量儀設計

電氣自動化論文編號:ZD602 論文字數:20191,頁數:40，有外文翻譯，原理圖，

目 錄
 
第 1章  緒論 1
1.1概述 1
1.2關于溫度檢測及水電站溫度巡檢國內外現狀 3
1.3系統簡介 4
1.4設計方案流程 4
第2章 溫度傳感器 6
2.1傳感器簡介 6
2.1.1傳感器概述 6
2.1.2傳感器組成 6
2.2 溫度傳感器選擇的重要性 7
2.3溫度信號獲取與放大電路 8
2.3.1溫度傳感器的選擇 8
2.3.2傳感器接口電路 9
第3章硬件設計 11
3.1單片機選型 11
3.1 1單片機概論 11
3.1.2單片機外界電路 17
3.1 3聲光報警電路 19
3.1.4數據存儲和時鐘電路 20
3.2穩壓電源的設計 21
3.2.1穩壓電源的組成 21
3.2.2電源設計 22
3.3模數轉換單元 24
3.3.1 12位串行A/D轉換器MAX187 24
3.3.2模數轉換單元電路的設計 26
3.4通信模塊設計 29
3.4.1 RS-485接口簡介 29
3.4.2電路設計 30
3.4.3 通信協議的建立 31
3.5顯示模塊的設計 32
3.5.1 DM-162液晶顯示模塊 33
3.5.2DM-162與MCU接口電路 34
小結 36
參考文獻 37
致謝 38

摘要
 本設計是以8051單片機系統為核心，用鉑電阻使溫度傳感器對水輪發電機組的軸承溫度、發電機定子繞組和鐵心的溫度、主變壓器的溫度等多點溫度進行實時巡檢，對溫度進行實時采集，得到模擬信號，經過模數轉換器將其轉換為數字信號，并且要將其中的干擾信號去除，輸入到單片機中進行處理，其結果不僅能在本地顯示，而且可以利用單片機串行口通過RS-485總線及通信協議將采集的數據傳送到主控機，進行進一步存檔，處理。如果溫度值超出限定范圍，系統將進行聲光報警，各檢測單元能獨立完成各自功能，從而加強對電站主要設備的安全監視，以保證設備的運行壽命和安全，提高水電站的安全運行水平。
 關鍵字：單片機，溫度傳感器，模擬信號，聲光報警
 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