工程车辆主动安全系统设计
发布时间：2018-10-05 18:40
【摘要】：近年来,我国的汽车保有量大幅提高,随之而来的问题是交通事故的频发,其中碰撞事故是最具代表性的事故形式。于是出现了基于声、光和电磁的主动安全系统,但是基于声和光主动安全系统在复杂的环境中会受到较大的影响,而基于毫米波雷达的主动安全系统受环境影响很小。本文基于毫米波雷达原理研究设计一种用于矿山区域工程车辆的主动安全系统。该系统是防止矿山区工程车辆发生碰撞的一种主动防御和报警装置,主要利用雷达传感器自动探测和发现工程车辆四周可能与其发生碰撞的车辆、行人、或其他障碍物体,通过设置安全距离范围,发出警报信号,以避免或减少事故的发生。本文介绍了家用轿车主动安全系统中的防撞雷达技术的国内外研究现状,主动安全系统基本原理;同时结合工程车辆使用环境,指出了基于毫米波的家用轿车防撞雷达的局限性,确定了用于矿山区工程车辆的主动安全系统的系统参数与设计原则,在系统参数与设计原则的牵引和约束下依据毫米波雷达原理设计了应用于环境比较恶劣的矿区大型工程车辆的主动安全系统,具体研究内容包括:(1)提出基于毫米波雷达传感器的探测方案和基于三角波调频连续波测距和测速方法;(2)根据主动安全系统中雷达探测的需求,设定天线波束方位和俯仰角等参数的阈值,从硬件层面实现设计方案中的三部天线、三个收发前端部件、一部数字信号处理部件等子系统的设计。具体包括:天线部分、高频模块、调制信号发生器、中频放大器、信号处理模块、显示报警模块;(3)对主动安全系统的核心部件数字信号处理模块软件进行设计,主要包括:数据采集处理、噪声处理、恒虚警处理、快速傅里叶变换和显示报警;(4)对系统的相关参数的选型进行了论述并通过仿真验证了系统设计的合理性。经系统参数论证和仿真试验显示,本文所设计用于矿山的工程车辆基于毫米波的主动安全系统能够在行驶过程中,实现障碍物距离实时显示、危险报警等功能,提高了行车的安全性。
[Abstract]:In recent years, the number of cars in our country has been greatly increased, and the following problem is the frequent occurrence of traffic accidents, among which collision accidents are the most representative form of accidents. There are active security systems based on sound, light and electromagnetism, but active safety systems based on sound and light will be greatly affected in complex environments, while active security systems based on millimeter wave radar are less affected by environment. Based on the principle of millimeter wave radar, an active safety system for mine regional engineering vehicles is designed in this paper. The system is an active defense and alarm device for preventing collisions of engineering vehicles in mining areas. It mainly uses radar sensors to automatically detect and detect vehicles, pedestrians, or other obstructed objects that may collide with engineering vehicles around them. Alarm signals are issued by setting a safe range to avoid or reduce accidents. This paper introduces the domestic and international research status of anti-collision radar technology in active safety system of household car, the basic principle of active safety system, and the use environment of construction vehicle. The limitation of household car collision prevention radar based on millimeter wave is pointed out, and the system parameters and design principles of active safety system for mine area construction vehicle are determined. According to the principle of millimeter wave radar, an active safety system for large engineering vehicles in mining area is designed under the traction and constraint of system parameters and design principles. The specific research contents include: (1) the detection scheme based on millimeter wave radar sensor and the method of ranging and velocimetry based on triangular-wave FM continuous wave; (2) according to the requirement of radar detection in active safety system, The threshold of antenna beam azimuth and pitch angle is set to realize the design of three antennas, three transceiver front-end parts, one digital signal processing unit and so on. It includes: antenna part, high frequency module, modulation signal generator, if amplifier, signal processing module, display and alarm module; (3) software design of digital signal processing module, which is the core component of active security system. It mainly includes: data acquisition and processing, noise processing, CFAR processing, fast Fourier transform and display alarm. (4) the selection of system parameters is discussed and the rationality of the system design is verified by simulation. The system parameter demonstration and simulation test show that the active safety system based on millimeter wave of the engineering vehicle designed in this paper can realize the functions of real-time display of obstacle distance and danger alarm while driving. The safety of driving is improved.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU602
[Abstract]:In recent years, the number of cars in our country has been greatly increased, and the following problem is the frequent occurrence of traffic accidents, among which collision accidents are the most representative form of accidents. There are active security systems based on sound, light and electromagnetism, but active safety systems based on sound and light will be greatly affected in complex environments, while active security systems based on millimeter wave radar are less affected by environment. Based on the principle of millimeter wave radar, an active safety system for mine regional engineering vehicles is designed in this paper. The system is an active defense and alarm device for preventing collisions of engineering vehicles in mining areas. It mainly uses radar sensors to automatically detect and detect vehicles, pedestrians, or other obstructed objects that may collide with engineering vehicles around them. Alarm signals are issued by setting a safe range to avoid or reduce accidents. This paper introduces the domestic and international research status of anti-collision radar technology in active safety system of household car, the basic principle of active safety system, and the use environment of construction vehicle. The limitation of household car collision prevention radar based on millimeter wave is pointed out, and the system parameters and design principles of active safety system for mine area construction vehicle are determined. According to the principle of millimeter wave radar, an active safety system for large engineering vehicles in mining area is designed under the traction and constraint of system parameters and design principles. The specific research contents include: (1) the detection scheme based on millimeter wave radar sensor and the method of ranging and velocimetry based on triangular-wave FM continuous wave; (2) according to the requirement of radar detection in active safety system, The threshold of antenna beam azimuth and pitch angle is set to realize the design of three antennas, three transceiver front-end parts, one digital signal processing unit and so on. It includes: antenna part, high frequency module, modulation signal generator, if amplifier, signal processing module, display and alarm module; (3) software design of digital signal processing module, which is the core component of active security system. It mainly includes: data acquisition and processing, noise processing, CFAR processing, fast Fourier transform and display alarm. (4) the selection of system parameters is discussed and the rationality of the system design is verified by simulation. The system parameter demonstration and simulation test show that the active safety system based on millimeter wave of the engineering vehicle designed in this paper can realize the functions of real-time display of obstacle distance and danger alarm while driving. The safety of driving is improved.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU602
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