遙控車

Abstract

中文摘要 (1) 目的： 有鑑於社會上的不當駕駛事件層出不窮，造成用路人的安全問題，倘若能夠讓車輛有預警及輔助功能，便能讓危險大大降低，有助於減少車禍發生之風險。 (2) 過程及方法： 利用AT89S52微控制器以及Keil編譯程式，使用兩顆直流減速馬達與H橋驅動電路搭配萬向輪來進行車體的移動。控制方面我們採用紅外線無線控制，由一組紅外線發射器與接收器，搭配PT2248與PT2249運作，並且運用光敏電阻對光亮度的特性偵測環境光。除此之外再加上另一組紅外線發射器與接收器置於車前，用作偵測車前短距離是否有障礙物。 (3) 結果： 以PT2248、PT2249達到無線遙控車體移動及蜂鳴器發響；且能在任何操作下都能及時偵測環境光，以完成車輛頭燈自動明亮之輔助；於車前之紅外線避障模組則能在任何操作情況下，若物品遮斷車前紅外線訊號時，能主動致使車輛停止以及發出警示。

Abstract Since the improper driving emerges endlessly in present society, cause the danger to the road traveler’s safety .Thus , we consider that what if vehicles could be equipped with early warning and assistive driving devices, it can helps avoid car accidents, doesn’t it?

We use AT89S52 microcontroller and Keil to compile codes, combining two DC gear motor and H-bridge which comprise of drive circuit with a mecanum wheel to urge the car moving. In terms of control, we used the infrared remote control. It is operated by a group of infrared emitters and receivers, which consist of PT2248 and PT2249. Additionally, we use the photoresistor to detect the ambient brightness, when the environment is too dark, the LED at the output can be automatically illuminated. Furthermore, we set up a pair of infrared emitter and receiver in front of the car. It can identify whether there are obstacles in front of the car.

To reach not only wirelessly controlling car movement by PT2248 and PT2249 and making buzzer ring ,but also detect the ambient brightness immediately in any operating condition for completing the aid of the LED illuminated on the car automatically . Moreover, we set up a pair of infrared emitter and receiver in front of the car .While the infrared signal in front of car is cut off by any obstacles, it can stop the car automatically and issue a warning in any operating situation.