【正文】
鄭州大學(xué)西亞斯國際學(xué)院 本科畢業(yè)論文(設(shè)計) 題 目 基于單片機的汽車倒車測距儀 指導(dǎo)老師 職稱 學(xué)生姓名 學(xué)號 20202025138 專 業(yè) 電子設(shè)計自動化 班級 EDA 1 班 院 (系 ) 電子信息工程學(xué)院 電子工程系 完成時間 2020年 04 月 20 日 I 汽車倒車測距儀的設(shè)計 摘 要 本文利用 超聲波傳輸中距離與時間的關(guān)系采用 AT89S52單片機進行控制及數(shù)據(jù)處理設(shè)計出了能精確測量點間距離的超聲波測距儀,利用所設(shè)計出的汽車倒車儀,能比較精確測量車后障礙物距離。在分析國內(nèi)外單片機汽車倒車測距儀相關(guān)技術(shù)的基礎(chǔ)上,結(jié)合最新研究成果,對基于超聲波測距的倒車測距系統(tǒng)的研制進行了深入探討和研究。該系統(tǒng)分為測距模塊、系統(tǒng)控制模塊和顯示報警模塊,并分別對其進行方案分析,構(gòu)建了單片機汽車倒車測距儀構(gòu)架和設(shè)計方案 ,在硬件電路中,詳細闡述了運用單片機技術(shù)實現(xiàn)的可視倒車預(yù)警系統(tǒng)的測距實現(xiàn)原理,分析了以單片機為主控單元的系 統(tǒng)硬件和軟件設(shè)計,并對該系統(tǒng)進行了試驗和誤差分析,給出了本系統(tǒng)的穩(wěn)定性指標。 關(guān)鍵字 AT89S52/超聲波 /收發(fā)電路 II THE DESIGN OF CAR PARKING RANGEFINDER ABSTRACT In this paper, using the relation of the ultrasonic transmission distance and time by AT89S52 MCU controlling and data processing design capacity points that can accurately measure the distance between the ultrasonic range finder, using the design of car parking ranger, can more accurately measure the distance between the obstacle and vehicle. SCM car parking on the analysis on the basis of rangefinders related technologies, bined with the latest research results, Based on Ultrasonic Ranging System reversing conducted indepth study and research. The system is divided into distance module, alarm system control module and display module, with respect to their program analysis, construction of the single chip architecture and design of car parking ranger program。 in the hardware circuit, described in detail the use of microputer technology to achieve Distance visual reversing warning system implementation principle, analysis based on single chip main control unit of the system hardware and software design, and tested the system and error analysis, Given the stability of the system indicators. KEYWORDS AT89S52/Ultrasound/ Transceiver Circuit III 目 錄 摘 要 .................................................. I ABSTRACT ............................................... II 1 引言 .................................................. 1 2 超聲波的介紹 .......................................... 2 超聲波的含義 ...................................... 2 超聲波的特點 ...................................... 2 超聲波測距原理 .................................... 2 3 單片機介紹 ........................................... 3 單片機的定義 ...................................... 3 單片機的發(fā)展過程 .................................. 3 單片機的特點 ...................................... 4 單片機的應(yīng)用 ......................................