论文首先研究了基于Har-like特征和Adaboost分类器的目标车辆探测算法原理和参数设置，并利用车载摄像头采集真实道路车辆图像，建立车辆样本数据库，训练车辆分类器，实现对道路车辆的探测，并对探测效果进行量化分析。针对在车辆探测过程中误检率较高、探测不连续以及检测框不稳定的现象，对基于无迹卡尔曼滤波器的车辆跟踪算法进行了研究，建立了车辆相对运动模型，对真实道路交通场景中的多目标车辆进行探测与跟踪，并对跟踪算法对探测性能提升的效果和原因进行了深入分析。在单目测距中，针对一般测距算法受车辆俯仰角和摄像头畸变影响很大的缺点，利用PreScan仿真软件，对车辆测距算法进行了改进，提山了一个同时考虑车辆俯仰角和摄像头畸变等参数的测距模型，以及一种将摄像头内参与外参分开标定的新方法，最后利用场地实验利真实道路交通场景对模型的测距精度、参数灵敏度进行量化分析。研究了仅利用图像信息估算车辆间碰撞时间的方法，利用PreScan仿真软件，对车辆碰撞时间估算算法进行了改进，建立了一个考虑车间相对加速度碰撞时间估算模型，最后，利用真实道路交通视频对算法进行验证和分析。最后，介绍了利用仿真软件辅助ADAS开发的方法，在虚拟的开发环境中建立了以真实摄像头物理参数为依据的摄像头仿真模型、交通场景，实现了对单目测距和碰撞时间估算算法的验证和改进。实验结果表明，论文中所建立的算法表现出良好的性能，所构建的基于PreScan的仿真平台能有效地提高算法的开发效率.
上传时间： 2022-06-21
上传用户：d1997wayne
智能车辆作为智能交通系统的关键技术之-，是许多高新技术综合集成的载体。本书以车辆自动导航为核心，共分8章，第1~3章的内容为智能车辆概论、智能交通系统总论、智能车辆的研究现状，系统地阐述了智能交通系统中智能车辆的基本方法、理论和技术；第4~6章的内容为智能车辆的图像处理算法、实时图像处理的硬件支持体系及相关的车辆综合电子控制技术，重点介绍了基于机器视觉的车辆白动导航技术，即支持实时图像处理的图像检查与分析的并行处理器体系结构，同时进行了图像检查与分析的并行处理器和多媒体增强指令集或矩阵增强指令集技术之间的对比，建立了图像检查与分析的并行处理器核心平台，进而在此平台上构建了对车道、车辆、障碍物的检测算法体系结构，通过车辆电子控制，实现了基于视觉的车辆自主安全驾驶；第7、8章介绍了智能车辆的构造和设计，进行了智能车辆性能的实地测试与行驶安全性分析。本书适合于交通运输工程、车辆工程、信息工程等学科研究人员、工程师、教师阅读；也可以作为该领域及相关领域的高年级本科生、研究生、博士生的教学参考书。
上传时间： 2022-06-23
上传用户：
ISO26262是从电子、电气及可编程器件功能安全基本标准IEC61508派生出来的，主要定位在汽车行业中特定的电气器件、电子设备、可编程电子器件等专门用于汽车领域的部件，旨在提高汽车电子、电气产品功能安全的国际标准。
上传时间： 2013-07-12
上传用户：努力努力再努力
研究并设计了基于16位单片机MSP430的小区燃气流量监测和远程传输的一体化解决方案，将传统的监测模块-安全栅-电源-传输电路进行一体化集成。引入了世界新兴的功能安全设计理念，可以有效地提高燃气监测系统的可靠性并大幅度降低产品的硬件成本。
上传时间： 2013-12-09
上传用户：busterman
This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 图Figure 1. Local Safety System
上传时间： 2013-11-05
上传用户：维子哥哥
This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 图Figure 1. Local Safety System
上传时间： 2013-11-14
上传用户：zoudejile
结合已有的基于MPEG视频流的行车障碍检测算法，在原有基础上加入检测匹配模板，对易造成误判的噪声及影响正常检测的非危险区域都有较好的处理效果。通过统计分析及经验验证，分析得出在直行、转弯及上下坡3种路况及不同车速下车辆正常安全行驶时的检测阈值T。该方法能结合实际，运算量小，实验结果较好。
上传时间： 2013-10-19
上传用户：agent
交通灯的设计！可以模拟义能灯的通行规律，保证人们及车辆的安全通行！
上传时间： 2016-10-16
上传用户：曹云鹏
Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 5：Chemical loads（EN）ISO16750-5 道路车辆-电气和电子设备的环境条件和测试 第5部分：化学负荷
上传时间： 2021-10-31
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随着现代科技术的进步，公路交通呈现出行驶高速化、车流密集化的趋势。同时，随着汽车工业的飞速发展，汽车的产量和保有量都在急剧增加。但公路发展、交通管理相对落后，导致了交通事故与日俱增，城市交通拥堵成为城市管理的难题。本设计在汽车前端放置超声波检测装置，通过对前方汽车车距的检测，送到中心控制器作出判断，进行车辆车速控制，从而达到车辆主动安全行驶，避免不必要的碰撞。设计利用智能小车来模拟真实车辆行驶环境，采用红外对管检测黑线实现循迹，超声波传感器测距实现避障，采用MSP43062553作为主控制芯片，电动车电机驱动采用L298N芯片，根据内置的程序分别控制小车四个直流电机运转，实现小车自动识别路线循迹行驶，能较有效的控制其在碰上障碍物时能及时停车。本设计结构简单，较容易实现，具有一定的智能性。这个系统安装在汽车上，能探测车辆前方的行人、车辆或周围障碍物，能向司机提前发出即将发生撞车危险的信号，促使司机采取应急措施来应付特殊险情，避免损失，在日常交通环境中提高了车辆行驶安全性，具有一定的市场推广价值。关键词：智能小车：msp430单片机；L298N；超声波传感器；红外传感器
上传时间： 2022-06-17
上传用户：
