【作者】 吴妍；

【导师】 袁佑新；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 本文研究了一种汽车倒车雷达预警系统。该系统在常见的汽车倒车预警装置的基础上采用计算机控制技术和超声波测距技术，通过显示障碍物与汽车的距离并根据其距离远近实时发出报警，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，提高了驾驶安全性。本文在研究汽车倒车雷达预警系统过程中，运用理论分析、电路设计和计算机仿真等研究手段，完成了倒车雷达预警系统硬件和软件的设计，采用了模糊控制算法，进行了系统的计算机仿真。本文在查阅、分析国内外倒车雷达系统相关技术的基础上，结合最新研究成果，对基于超声波测距的倒车雷达预警系统的研制进行了深入探讨和研究。该系统分为测距模块、系统控制模块和显示报警模块，并分别对其进行方案分析，构建了倒车雷达预警系统的系统构架和设计方案；在硬件电路中，详细阐述了运用单片机技术实现的可视倒车雷达预警系统的测距实现原理，分析了以AT89S52单片机为主控单元的系统硬件和软件设计，并对该系统进行了试验和误差分析，给出了本系统的稳定性指标。试验结果显示，该系统对室内有限距离的距离测量具有较高的精度，实现了倒车提示和距离报警功能，其主要技术指标达到了系统设计要求，并通过系统仿真研究，验证了系统的可靠性和可行性。更多还原

【Abstract】 The thesis introduces a kind of Car Reversing Aid-System in detail. The system adopted the technology of computer controll and Ultrasonic Distance-Measurement based on the currently Car Reversing Aid-System.The system alarmed in time through displaying the distances between obstacles and cars. It soluted the puzzle poblem because the drivers looked around through the mirrors when they stopped or started the vehicle. The system would greatly solve the difficulties and meanwhile improve the driving safety.In this thesis analysis in theory, design of electronic circuit and experimental investigation on real time simulation system are employed to carry out the research. It realized the design of hardware and software. According to the paper, the fuzzy control theory is introduced and the simulation is developed in the system.The thesis mainly analyzed deeply the research on the design of Car Reversing Aid-System. Firstly, according to the latest researches in domestic and foreign countries, the system consisted of the Distance-Measurement Module, Control Module and Display or Alarm Module.The paper discussed the scheme of three module and selected the best system scheme in the paper. Secondly, it presented the theory and characters of Ultrasonic Distance-Measurement and analyzed in detail design of the hardware and software based on the AT89S52 microcontroller. Thirdly, the fuzzy control algorithm is proposed, the simulation is introduced into the system. At last, through the experiment and error analysis, it proved the stability of the system.To monitor its reliability, imitations of main cases of the system have been carried out and stable instructions of strategic system have already been received, which verify its efficiency and feasibility.更多还原