秦浠莲

摘 要：針对目前国内行车安全辅助设备存在功能分散，导致系统安装复杂、成本昂贵以及系统间相互干扰等缺点，且如防误踩油门系统等研究尚未成熟，本文研究一款集倒车雷达、行车雷达及防误踩油门功能于一体的行车安全辅助装置。论文首先对防误踩油门模块的原理组成进行讨论及构建;对误踩油门的判断因素进行分析，确定了以油门踏板踩下的电压峰值、电压峰值变化率以及车辆与障碍物之间的距离作为油门误踩的判断依据，并通过实验获取误踩因素的阀值;其次，基于Altium Designer设计STM32单片机核心控制模块以及各功能子模块的硬件电路原理图，研究各功能子模块软件实现方法及控制流程，研究系统的集成控制方法，并采用Keil μVision 集成编译环境编写STM32控制程序;通过数据共享、交互系统共享等方式将防误踩油门系统与倒车雷达、行车雷达等系统进行整合。最后，完成系统实物制作并进行测试试验，试验结果表明所设计的行车安全辅助系统能够在驾驶员错把油门当刹车的情况下，准确识别该误踩行为并控制发动机进入怠速工作状态，同时进行语音报警提示。本文设计的行车安全辅助系统成本低、易于推广，对于保障汽车的行车安全，降低事故的危害性具有一定的意义。

关键词：油门踏板 误踩油门 STM32 单片机

Research and Realization of Driving Safety Assistant System

Qin Xilian

Abstract：In view of the decentralized functions of the current domestic driving safety auxiliary equipment， the system installation is complicated， the cost is expensive， and the mutual interference between systems， and the research on the anti-accelerator system is not yet mature. This paper studies a set of reversing radar and driving radar. It is a driving safety assist device that integrates the function of preventing accidentally stepping on the accelerator. The thesis first discusses and constructs the principle composition of the anti-accelerator module. Then it analyzes the judgment factors of the accelerator pedal， and determines the voltage peak value， the voltage peak change rate and the distance between the vehicle and the obstacle when the accelerator pedal is stepped on. As the basis for judging the misstepping of the accelerator， the threshold value of the misstepping factor through experiments is obtained; Thirdly， based on Altium Designer， the article designs the core control module of STM32 single-chip microcomputer and the hardware circuit schematic diagram of each functional sub-module， and studies the software implementation method of each functional sub-module and control process， and studies the integrated control method of the system， and uses Keil μVision integrated compilation environment to write STM32 control program to integrating the anti-accelerator system with the reversing radar， driving radar and other systems through data sharing and interactive system sharing. Finally， the article completes the physical production of the system and conducts test tests. The test results show that the designed driving safety assist system can accurately recognize the misstepping behavior and control the engine to enter the idling state when the driver mistakes the accelerator for braking. The driving safety assistance system designed in this paper is low in cost and easy to promote. It has certain significance for ensuring the driving safety of vehicles and reducing the hazards of accidents.

Key words：accelerator pedal， anti-accelerator pedal， STM32， single chip microcomputer

1 引言

1.1 研究的背景与意义

1.1.1 课题的研究背景

汽车作为一种便捷的交通工具，给人们带来了极大便利的同时，也对我们的安全构成了不小的威胁。……