CAN总线在汽车行驶记录仪中的应用

传统汽车行驶记录仪由于采集信号多,信号传输复杂,往往不能保证终端获取数据的准确性.将CAN总线应用到汽车行驶记录仪设计中,采用了CAN总线控制器SJA1000,CAN总线收发器TJA1050,实现了汽车行驶记录仪闽的远程多点数据通信.给出了汽车行驶记录仪CAN总线接口电路硬件设计原理和软件设计流程.CAN总线的使用,提高了汽车行驶记录仪的稳定性,使得汽车行驶记录仪数据传输更为可靠,使用更为方便.     

基于CAN总线的汽车行驶信息处理系统的设计

设计了一种基于CAN总线的汽车行驶信息处理系统。该系统通过对汽车行驶时间、速度及各个开关量信息进行记录、存储,不仅能够实现数据采集单元和数据分析软件之间的数据采集,还能根据车辆行驶信息,绘制出各种行驶曲线。系统采用Visual Basic开发,数据信息查询简洁快速、界面美观、色调适宜、抗干扰能力强、工作稳定可靠。     

汽车行驶记录仪的研究与开发

本文根据公安部颁布的汽车行驶记录仪国家标准的要求，采用μPSD3334D单片机为微处理器，从记录仪的主要功能和结构，软硬件的设计方面对汽车记录仪进行研究与开发，实现了汽车行驶记录仪的显示功能、按键操作功能和实时时钟等功能，能够方便地实现速度、里程的显示与存储功能．     

基于ARM汽车行驶记录仪关键模块硬件设计

文章介绍基于ARM 内核LPC2294汽车行驶记录仪关键模块硬件设计,关键模块包括电源模块、USB HOST模块、存储体模块、时钟模块、CAN模块.利用LPC2294和相关模块实现汽车行驶记录仪对汽车各种状态进行记录和传送.很好实现了汽车行驶记录仪各种标准和扩展功能.     

汽车行驶状态记录仪系统设计

汽车行驶状态记录仪是一种安装在汽车上实现类似于飞机黑匣子功能的一种设备,它可以全程记录汽车行驶数据,并通过对所记录的行驶信息数据进行分析从而对车辆的各种状况予以精确的掌控,利用它可有效预防驾驶员违章驾驶、遏制重大交通事故,具有准确性、高效性和易用性等特点.本文将介绍如何用51单片机实现汽车行驶状态记录仪系统的设计.设计...     

汽车制动性评价及制动距离效果分析

汽车在行驶过程中会有一定的动能,随着汽车行驶速度不断提高,为了使行驶速度降低或者停车,就必须对汽车施加一个相反的阻力,驾驶员要根据交通情况来对制动力进行控制,来实现车辆停止的强制制动,汽车的制动功能是汽车的主要功能,而汽车的制动效能是汽车在生产及使用过程中的最基本评价指标.     

无线传输在汽车行驶记录仪中的应用

提出并实现了无线传输在汽车行驶记录中的使用方法。将无线模块添加到汽车行驶记录仪中,并设计了无线传输协议,用于快速检测记录仪中的数据,如超时、超速等。试验测试结果表明,该方法能够移动,远程、快速、准确地获取信息,具有较好的性价比以及推广价值。     

基于ARM的汽车“黑匣子”设计

本文设计的基于TI公司的TMS470R1A256汽车行驶记录仪可以记录汽车行驶的状态,并对通过汽车行驶状况的记录分析、鉴定道路交通事故,提高交通管理执法水平和运输管理水平,保障车辆运行安全具有重要作用。文中主要给出了系统的硬件设计及主程序的软件设计。本文在传统记录仪的基础上,增加GPRS,GPS及USB主机等功能,实现对正在行驶的汽车进行远程监控、卫星导航等功能。     

汽车行驶记录仪中USB HOST相关模块的设计

本文介绍了基于单片机和USB HOST接口芯片在汽车行驶记录仪中实现USB HOST功能的相关模块设计，该模块很好地实现了汽车行驶记录仪中单片机向优盘大量数据的快速传输。     

防碰撞无线通信汽车黑匣子的系统设计

采用无线模块与汽车行驶记录仪结合的方法,配合PC机可以实时且较准确地获取汽车行驶记录仪的各项信息。详细阐述添加无线模块的汽车行驶记录仪的系统设计,该系统集数据存储、数据采集、数据分析为一体,着重分析了汽车行驶记录仪的硬件结构设计和软件设计,并对实际应用中产生的无线碰撞问题提出了解决方案。     

基于LabVIEW的智能车综合信息监控系统开发

针对比赛寻迹型智能汽车运行控制,开发了一种基于LabVIEW虚拟仪器平台,可用于以Freescale系列为微控制器的智能车综合信息监控系统。该系统可以满足光电、摄像头、电磁3种不同类别传感器智能车的信息采集与处理需求。通过无线通信模块,将实时采集智能车各项参数在LabVIEW搭建的上位机系统中显示,同时提供了调试窗口,方便队员进行在线调试,提高了智能车的开发制作效率,有效地帮助队员现场发挥取得好成绩。     

基于虚拟仪器技术电机式汽车仪表的设计

针对电机式汽车仪表中虚拟仪器技术的应用,从设计的实现方面入手,做了简单的论述分析.基于虚拟仪器技术的电机式汽车,其车速表与里程表等的性能较强,能够精准的反映出汽车行驶的实际情况,为驾驶人员提供准确的信息,以及时做好车辆运行维护工作,及时为汽车补充能量,确保汽车能够稳定的运行.     

游戏化汽车维修学习软件的开发研究

该研究选取常见的汽车维修知识为主要内容,以有车一族和汽车专业学习者为目标人群,利用Flash游戏引擎开发游戏化学习软件。在该游戏化学习软件中,突破了以往仅仅是文字、图片等介绍性为主的单一教学方式,通过Flash技术让现实中的汽车修理厂再现,让学习者能够在创设的虚拟情景中直观地学习汽车维修知识。同时游戏的趣味性能够让学习者在学习中更加主动,取得较好的学习效果。     

Creative destruction [car crash testing]

Crashing cars-lots of them-is how Volvo safety engineer Daniel Hedqvist earns his living. Running cars into steel barriers or other cars or the sides of mountains is his job. These days the Swede rigging up plenty of Fords for crash tests. Ford owns the prestigious Volvo, Jaguar, and Aston Martin car companies, and has made Sweden its center of excellence for vehicle safety testing. There's a good reason why the second-largest US car maker has ceded this area of expertise to a non-US supplier: few auto companies have won as many awards for car safety as Volvo. This article discusses safety testing of cars at Volvo using virtual crashes and real crashes. The unique features of the test facilities are briefly outlined including the two intersecting test tracks: a 154-meter fixed track and an 80-meter movable one that can be turned as much as 90 degrees. Front and side collisions can thus be tested at virtually all angles. If the back door at the end of the movable track is opened, cars can be sent flying directly into the rocky hillside outside. For so-called barrier tests, a single car on the fixed track hurtles into an 850-ton block at the far end.     

Real-time enhancement of reference signals for feedforward controlof random noise due to multiple uncorrelated sources

The problem envisaged in this paper is the optimization of the reference set for broadband feedforward control of sound and vibration in the presence of multiple, uncorrelated primary sources. A real-time algorithm is presented that generates a set of orthogonal virtual references out of a given set of reference signals. The algorithm is based on recursive singular value decomposition (SVD) techniques. The technique simplifies controller design in the sense that primarily, comparable control performance can be achieved using a reduced set of virtual references instead of the extensive original reference set. Hence, controller dimensions (and, thus, the memory requirements for implementation) and the computational burden reduce accordingly. Second, it is shown that convergence speed of the adaptive filtered-X LMS feedforward control algorithm is enhanced. The technique is applied to active control of structure-borne road noise inside a car cabin. Time domain simulation of a control configuration, utilizing either an extensive set of original references as well as a reduced virtual reference set, shows that in the frequency ranges of interest, a set of four virtual references yields the same noise reductions as the original set of 12 references     

Evaluating automatic debiting systems by modelling and simulationof virtual sensors

The Dutch government is considering placing Automatic Debiting Systems (ADS) for electronic fee collection (EFC) on the highways. These systems would interact via a transponder in each passing car, and subtract a fee from the driver's credit card. Nonpayers would be photographed and fined. The ultimate goal is to use these systems to influence road usage. It is shown how the concept of virtual sensors, designed for goal-directed sensing in (robotic) autonomous systems, can be used in the design of the simulation. It is also shown how this forces the choice for a discrete event simulation, which in turn affects the implementation of the virtual sensor concept     

Auto manufacture digitizes in depth

Automobile manufacture typifies one aspect of today's highly competitive, global economy. It is generally a large, distributed effort, spread out over several continents and involving thousands of engineers and technicians, whom digital technology is helping to work together. Only with this technology's aid can they hope to respond to competitive pressures by cutting costs and, more importantly, by shortening the design-to-manufacturing cycle for the new car models. The author considers how the integration of design and manufacturing software, coupled with the aggressive use of digital prototypes and virtual reality, is already helping auto makers cut costs as well as time-to-market     

基于光电导航的智能移动测量小车设计

提出了一种智能车设计,该智能车设计采用飞思卡尔K60 MCU为核心处理器件,通过CMOS摄像头获取跑道路径并配置主动蓝光照明系统辅助照明,实现精确导航。智能车行走时,该智能车配备的激光检测模块实现对跑道两旁红色中华铅笔的数量测量以及智能车行驶过程中进出隧道的检测。而光电编码器的反馈信号既可经PID算法控制智能车的行驶速度,同时在隧道里也可凭此计算出隧道长度。实验结果表明,该智能车设计合理、电路稳定,可快速平稳行驶和准确测量,在智能车测量应用方面具有重要意义。     

New Map‐Matching Algorithm Using Virtual Track for Pedestrian Dead Reckoning

In this paper, a map‐matching (MM) algorithm which combines an estimated position with digital road data is proposed. The presented algorithm using a virtual track is appropriate for a MEMS‐based pedestrian dead reckoning (PDR) system, which can be used in mobile devices. Most of the previous MM algorithms are for car navigation systems and GPS‐based navigation system, so existing MM algorithms are not appropriate for the pure DR‐based pedestrian navigation system. The biggest problem of previous MM algorithms is that they cannot determine the correct road segment (link) due to the DR characteristics. In DR‐based navigation system, the current position is propagated from the previous estimated position. This means that the MM result can be placed on a wrong link when MM algorithm fails to decide the correct link at once. It is a critical problem. Previous algorithms never overcome this problem because they did not consider pure DR characteristics. The MM algorithm using the virtual track is proposed to overcome this problem with improved accuracy. Performance of the proposed MM algorithm was verified by experiments.     

一种基于倾角传感器的伺服调平系统设计

伺服调平系统是相控阵雷达的重要配套设备,按照雷达系统的工作过程,实现雷达天线车的自动调平和撑腿收回。本文介绍一种基于倾角传感器的伺服调平系统,将天线车的倾角值作为自动调平和撑腿收回的依据,可靠性高,降低了伺服调平系统虚腿和单腿承载过重的风险。