1、 车用倒车雷达设计车用倒车雷达设计 【摘要摘要】 倒车雷达是汽车泊车或者倒车时的安全辅助装置，能以声音或者更为直观的 显示告知驾驶员周围障碍物的情况，解除了驾驶员泊车、倒车和起动车辆时前后 左右探视所引起的困扰，并帮助驾驶员扫除了视野死角和视线模糊的缺陷，提高 驾驶的安全性。本设计利用 ATMEL 公司的 AT89C51 单片机、超声波传感器测距 实现超声波倒车雷达。利用 LED 和发光二极管表示传感器探测范围内是否有障碍 物，当在探测范围内有障碍物时，发光管以一定频率闪烁，闪烁的频率以距离定， 距离越近频率越高。同时蜂鸣器提示报警，探测并指明障碍物距离。 【关键词】【关键词】 倒车雷达，超声
2、波，测距，报警，单片机 The designs of the vehicle back-draft radar using ultrasonic theory 【Abstract】 Back-draft radar is the safety and assistant devices when parking or reversing a vehicle, it can tell drivers circs about the around barrier with voice or a more intuitive display, release the surrounded visit
3、 puzzle from drivers when parking, reversing and start vehicles, and to help drivers clean off dead ends and the limitation of vision blur, improve the security of driving. Using Single Chip AT89C51 of ATMEL and Ultrasonic Sensor measure distance to achieve Ultrasonic Back-draft Radar. Using LED and
4、 LBD Sensor to detect whether there are barriers, when detecting barriers within the scope, the LBD will blink with a confirm frequency, the blink frequency of LBD is determined by the distance of barrier, the nearer distance and the higher frequencies. At the same time, The Voice Alarm warning, detecting the distance, and demonstrate the distance of barrier. 【Key Words】 Back-draft radar, ultrasonic, measure, warning, microprocessor 目目 录录 第一章 引言
