泊车辅助系统倒车雷达的设计

摘 要 倒车雷达又称泊车辅助系统，是汽车泊车安全辅助装置，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，提高了安全性。本文介绍了以单片机为核心的一种低成本、高精度、微型化，并有数字显示和声光报警功能的倒车雷达系统倒车雷达 超声波 单片机Abstract Parking sensor, also known as parking assist system, the vehicle parking assist device security, voice, or be able to tell the driver a more intuitive display of the situation around the obstacle, to lift the drivers start parking and vehicle access around, caused bytrouble, and help the driver to remove the dead zone and blurred vision, and improves the security.Generally by the ultrasonic sensors (commonly known as probes), controls and displays and other components, parking sensor on the market today are mostly using ultrasonic ranging principle, the driver in reversing start reversing radar, under the control of the controller, the device wasrear bumper send ultrasonic probe encountered obstacles, generate echo signal, the sensor receives the echo signal data processing by the controller, determine the location of obstructions, and issued by the display shows the distance warning signaltimely warning, so be aware of drivers when reversing to make backup easier.Tips for reversing radar can be divided into liquid crystal, three kinds of language and sound; to receive a wireless transmission and wired way transmission.The program uses voice prompt manner, this paper, the SPCE061A MCU as the core of a low-cost, high accuracy, miniaturization, and a digital display and sound and light alarm function reversing radar system.Use of available SPCE061A single-chip microcontroller voice, add three ultrasonic ranging modules to form a sample of reversing radar system, voice alarm (0.35m ~ 1.5m) within the barrier. Key words: parking sensor; ultrasonic;MCU 目 录 第1章 绪 论 1 第2章 实现功能 2 第3章 核心器件简介 3 3.1 SPCE061芯片特性 3 3.1.1 SPCE061简介 3 3.1.2 芯片特性 4 3.2 SPCE061A精简开发板 5 3.3 超声波测距模组 6 3.4 转接板 9 第4章 系统总体方案介绍 12 第5章 系统硬件设计 14 5.1 SPCE061A 14 5.1.1 SPCE061A 14 5.1.2 电源模块 15 5.1.3 放音模块 15 5.2 超声波测距模组电路原理 16 5.2