【正文】 調速系統(tǒng)。 智能循跡小車設計要求（1）自動尋跡小車從安全區(qū)域啟動。 智能循跡小車設計原理這里的循跡是指小車在黑色地板上循白線行走，通常采取的方法是紅外探測法。 本設計就采用了比較先進的 80C51 為控制核心，80C51 采用 CHOMS 工藝，功耗很低。第三代單片機包括了 Intel 公司發(fā)展 MCS51 系列的新一代產(chǎn)品，如8ｘC152 ﹑80C51FA/FB﹑80C51GA/GB﹑8ｘC451﹑8ｘC452,還包括了Philips﹑Siemens﹑ADM﹑Fujutsu﹑OKI﹑HarriaMetra﹑ATMEL 等公司以 80C51 為核心推出的大量各具特色﹑與 80C51 兼容的單片機。本設計采用 MCS51 系列中的 80C51 單片機。本題目是結合科研項目而確定的設計類課題。Electricity motive small car.目 錄1 緒 論 ......................................................................................................................................3 本課題研究的背景和意義 ................................................................................................3 智能循跡小車設計原理 ....................................................................................................52 方案設計與論證 ......................................................................................................................5 直流調速系統(tǒng) ....................................................................................................................5 檢測系統(tǒng) ............................................................................................................................63 智能尋跡小車模塊設計 ........................................................................................................10 總體方案 ..........................................................................................................................10 傳感檢測單元 ..................................................................................................................11 小車循跡原理 ............................................................................................................11 傳感器的選擇及檢測電路設計 ................................................................................11 傳感器的安裝 ............................................................................................................12 軟件控制單元 ..................................................................................................................13 單片機選型及程序流程 ............................................................................................13 車速的控制 ................................................................................................................13 電機驅動單元 ............................................................................................................14 蜂鳴器電路設計 ........................................................................................................15 穩(wěn)壓電源設計 ............................................................................................................154 系統(tǒng)功能測試 ........................................................................................................................15 測試儀器及設備 ...............................................................................................................15 功能測試 ...........................................................................................................................155 結束語 ....................................................................................................................................17致 謝 ........................................................................................................................................18參考文獻 ....................................................................................................................................19附 錄 ........................................................................................................................................201 相關芯片介紹 .....................................................................................................................20 單片機概述 ...................................................................................................................20 LM339 芯片介紹 ........................................................................................................24 L298N 芯片介紹 .........................................................................................................27 7805 芯片介紹 ............................................................................................................282 小車控制程序源代碼（C） ...............................................................................................301 緒 論 本課題研究的背景和意義隨著汽車工業(yè)的迅速發(fā)展，關于汽車的研究也就越來越受人關注。ABSTRACT80C51 is a 8 bit single chip puter. Its easily using and multifunction suffer large users. This article introduces the CCUT graduation design with the 80C51 single chip puter. This design bines with scientific research object. This system regards the request of the topic, adopting 80C51 for controlling core, super sonic sensor for test the hinder. It can run in a high and a low speed or stop automatically. It also can record the time, distance and the speed or searching light and mark automatically the electric circuit construction of whole system is simple, the function is dependable. Experiment test result satisfy the request, this text emphasizes introduced the hardware system designs and the result analyze.The adoption of technique as:(1) Reduce the speed by program the engine；(2) Efficient application of the sensor。整個系統(tǒng)的電路結構簡單，可靠性能高。摘 要80C51 單片機是一款八位單片機，他的易用