Identification cards - contactless integrated circuit cards - proximity cards - part 3 : initialization and anticollision 识别卡.无接触点集成电路卡.接近式卡.第3部分:初始化和防撞
Identification cards - contactless integrated circuit cards - vicinity cards - part 3 : anticollision and transmission protocol 识别卡.无触点集成电路卡.邻近卡.第3部分:抗碰撞和传输协议
Abstract : this paper introduces a kind of new anticollision beam , hold cage type absorption power anticollision beam . it can not only absorb a large overwind power and decrease impact power lose but also prop cage 文摘:介绍了一种新型的防撞梁?托罐式吸能防撞梁，它不仅能把过卷的大部分能量吸收掉，使撞击的损失减小，而且还能把容器托住。
Popular automotive anticollision radar is required to measure the velocity and angle of its targets as well as range . therefore , the short - wavelength high - resolution millimeter wave is used , measuring range and velocity through fmcw scheme , measuring angle through multi - beam scanning 通行的汽车防撞雷达采用了波长短、测量精度高的毫米波，以调频连续波制式测量距离和速度，以多波束扫描的方式测量角度。
Today . getyear built in 1989 , with the predominant position and convenient transportation our corporation situates in xiebian industrial zone of dali , nanhai , which is renowned as aluminum profile production base of china . as one of the earliest corporations of aluminum products , our main products are sealed transparent adhesive tapes for aluminum doors and windows , rubber tubes , blowing membrane material , domestic and imported anticollision adhesive tapes , rubber transparent anticollision adhesive tape , magnetic stripes , latent wheels of built - in cupboards and other furniture fittings of aluminium material with the brand of weijia and hengjiao 我厂创建于1989年，位于经济发达，素有“全国铝材生产基地”之称的南海大沥镇谢边工业区，地理位置优越，水陆交通十分方便快捷，是一家专业研制生产经营威佳牌横?牌铝门窗透明密封胶条胶管吹膜料国产和进口防撞胶条橡胶透明防撞胶条带自粘透明磁条毛条自粘毛条壁柜隐轮及铝材家具配件等各种产品规格全的大型企业，也是广东地区最早开发生产此类产品的厂家之一。
In this paper , the if circuit , the processor based on the pulse count technology and the adaptive signal processing of the system are discussed thoroughly . major contents are abstracted as follows : 1 the evolved . history of the anticollision radar system is given curtly . the development of the signal processing of the radar and the application of the digital signal processing technology to the radar system is summarized 本文重点讨论了毫米波防撞雷达系统的中频电路及其改进、基于脉冲计数新方法的处理机和自适应信号处理等的研究工作，主要研究内容摘要如下： 1简要介绍了防撞雷达系统的发展历史，总结了雷达信号处理的发展和数字信号处理技术在雷达系统中的应用及其实现方法。
Focused on the realization in engineering practice , this paper discussed automotive anticollision radar ' s function requirement , working principle and system design . through summarizing and analysis of its research and development , the paper proposes a new type of secondary centimeter wave automotive anticollision radar that applied on the expressway 本文以现有技术的可实现性为出发点，讨论了汽车防撞雷达的性能要求、工作原理和总体设计等相关问题，总结了国内外汽车防撞雷达的研发状况，在此基础上设计了一种应用于高速公路上的应答式厘米波汽车防撞预警雷达。
2 the fmcw millimeter - wave radar system is introduced . the basic parts of the system and its work principle , as well as the index of it , are discussed in detail . the sae - 100 millimeter - wave anticollision radar system and the anticollision radar used in the industry are also introduced curtly 2简单介绍了fmcw毫米波雷达系统，包括它的测速、测距原理，基本组成与结构和其主要的性能指标，并简单介绍了已研制的sae - 100型毫米波防撞雷达系统和工业用fmcw毫米波避碰雷达系统及防撞雷达的应用。
Considering that : ( 1 ) radar can achieve its basic application of collision avoidance and warning with the only function of ranging ; ( 2 ) under high speed conditions , radar should have lager effective range than that under slow speed , we designed a new easily realizable automotive anticollision radar , which employs centimeter wave and square pulse amplitude modulation 考虑到： （ 1 ）核心的测距功能实现以后，雷达已经能够完成基本的防撞预警； （ 2 ）在汽车高速运行的情况下，防撞雷达的最小可测距范围和最大作用距离应比低速状态下大。本文采用了技术成熟，易于工程实现的厘米波脉冲雷达，以单波束辐射的方式测距。
In recent years , with the rapid development of the millimeter - wave radar technology and the demand of the safety , anticollision radar system is being studied and used widely . the if ( intermediate frequency ) circuit and the digital signal processing are two important parts of it 随着毫米波雷达技术的日益成熟和人们对安全性的迫切需要，近年来，防撞雷达系统得到了深入研究和广泛应用，如自动巡航控制、碰撞报警和防碰撞系统以及有待发展的雷达成像和汽车的自动驾驶系统等。
