基于單片機的電子式轉速里程表的設計

電子機電論文編號:JD690  論文字數:14828,頁數:39
目 錄

摘要……………………………………………………………………………………Ⅰ
Abstract………………………………………………………………………………Ⅱ
第一章 前言……………………………………………………………………………1
1.1 研究的目的與意義………………………………………………………………1
1.2 國內外研究概況及發展趨勢……………………………………………………1
第二章 系統的總體設計……………………………………………………………5
2.1 系統的總體結構…………………………………………………………………5
2.2 轉速里程表的工作原理…………………………………………………………5
第三章 系統的硬件設計………………………………………………………………8
3.1 傳感器的選擇……………………………………………………………………8
3.1.1 霍爾傳感器的選擇………………………………………………………8
3.2 系統CPU的選擇…………………………………………………………………11
3.3 X5045在本設計中的應用………………………………………………………13
3.4 指針轉速驅動設計原理………………………………………………………16
3.4.1 電動轉速表結構………………………………………………………16
3.4.2 LM1819專用集成電路簡介……………………………………………16
3. 5 液晶顯示模塊LCM1010的應用………………………………………………18
第四章 系統的軟件設計……………………………………………………………21
4.1 主程序模塊……………………………………………………………………22
4.2 中斷服務程序模塊……………………………………………………………23
結論…………………………………………………………………………………25
參考文獻……………………………………………………………………………26
致謝…………………………………………………………………………………27
附錄…………………………………………………………………………………28

摘 要

介紹一種新型的基于單片機的電子式汽車轉速里程表的實現方案。討論了里程計數的原理和轉速指示原理。針對機械式里程表缺點結構復雜，精度不高，并且價格較昂貴，設計了數字式汽車轉速里程表。
設計中以AT89C2051單片機為核心，利用SPI串行總線開發了電子式里程表。該里程表利用磁電式傳感器采樣汽車行駛所得到的信號；采用LCD數碼管顯示汽車總行駛里程數，本次里程采E2PROM芯片X5045，利用其通電可改寫，掉電信息可保存的特點存儲汽車行駛的總里程數。
設計的轉速里程表具有結構簡單，精度較高，誤差較小，顯示清楚醒目，穩定可靠等特點，另外對該系統的軟件也作了相應的說明。

關鍵詞：汽車；轉速里程表；單片機

 Turn according to the electronics type of a machine soon the design of the table of distance

Abstract

Introduce the realization scheme that one kind of new pattern electron baseding on the oneboard computer style motor vehicle rotates speed the odometer .Talk about mileage count rule and the rotation speed instruction rule .In view of the mechanical type odometer defect composition is complex ,The accuracy is not tall ,Moreover price is more dear ,Design the figure style motor vehicle rotation speed odometer .Takes AT89C2051's oneboard computer as the core here ,Utilize the SPI's serial bus to open up the electron style odometer .
That odometer utilizes the magnetism electricity style sensor sampling motor vehicle to ply the signal that obtains ;Adopt LCD's nixie light to display the motor vehicle invariably to ply the mileage figure ,This mileage is plucked E2PROM chip X5045 ,Utilize such circular telegram to adapt ,Mileage figure invariably that the distinguishing feature memory motor vehicle ply that ac dump message may be conserved .
It is easy that this the design rotation speed odometer havees the composition ,The accuracy is taller ,The error is littleer ,The display is clearly attracted attention ,The distinguishing feature such as steady dependablely and so on ,Besides software to that system also do the relevant directions.

Keyword : Car；Turn soon mileage meter；Oneboard computer