第一章 航海雷达基本原理
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1、MARINE RADAR AND ARPAChapter 1 Basic Principle of RadarMarine Radar and ARPAChapter 1Basic Principle of RadarThe Development & Principle of Marine Radar Radar ConceptThe development of radar techniqueThe use of radar at sea General DescriptionThe principle of range and bearing measurement Display pr
2、esentation of a basic radarMarine Radar and ARPAChapter 1Basic Principle of RadarRadar ConceptGeneral Concept RadarRadio detection and rangingFrom the name: To find and measure the targets that you concern about by way of radio magnetic wave. Scientific definition: Radar is a kind of electronic syst
3、em which can be used to find the targets and to measure or determinate the targets information/data by way of the characteristics of electromagnetic wave.Marine Radar and ARPAChapter 1Basic Principle of RadarThe characteristic of electromagnetic wave: ReflactionFind: ReflectRelayRadiateTargets: All
4、the objects that can be found by radar. Targets information/data: position speed, course, collision avoidance informationconstant speedstraight lineMarine Radar and ARPAChapter 1Basic Principle of Radar雷达是一种主动遥感设备，它利用电磁波的二次辐射雷达是一种主动遥感设备，它利用电磁波的二次辐射、转发或固有辐射来探测目标，并测定目标的空间坐、转发或固有辐射来探测目标，并测定目标的空间坐标、速度及避
5、碰参数的一个无线电技术范围。称为标、速度及避碰参数的一个无线电技术范围。称为“雷雷达达”。“二次辐射二次辐射”：雷达发射电磁波到目标后、目标产生：雷达发射电磁波到目标后、目标产生“二二次辐射次辐射”，其中一小部分被雷达天线接收，称为目标回，其中一小部分被雷达天线接收，称为目标回波波, 雷达收到回波便可发现目标。雷达收到回波便可发现目标。“转发转发”： 来自应答器（来自应答器（Transponder），），“识别器识别器”，后者收到雷达信号后发射经过编码的后者收到雷达信号后发射经过编码的“应答波应答波”被雷达被雷达所接收，从而发现目标。所接收，从而发现目标。“固有辐射固有辐射”：来自具有固有辐射
6、源的目标（如飞机、：来自具有固有辐射源的目标（如飞机、发动机、核爆炸、目标上无线电装置等）雷达接收目发动机、核爆炸、目标上无线电装置等）雷达接收目标的固有辐射波而发现目标标的固有辐射波而发现目标。Marine Radar and ARPAChapter 1Basic Principle of Radar现代雷达与电子计算机、图象处理、数据处理、自现代雷达与电子计算机、图象处理、数据处理、自动控制等技术结合，又具有自动信息处理功能及智动控制等技术结合，又具有自动信息处理功能及智能化显示终端，可自动、迅速、准确地完成测量、能化显示终端，可自动、迅速、准确地完成测量、显示、控制和管理。显示、控制和管
7、理。Marine Radar and ARPAChapter 1Basic Principle of Radar1886-1888 Hertz (Germany): realized electromagnetic wave oscillating, transmitting, receiving. 1914 (American): Echo sounderProto-model of radar. 1922 Marconi (Italy): Suggested a practicable radar system. 1930 Blair: Pulse echo measurement (ra
8、nge, direction) systembasic radar. Marine Radar and ARPAChapter 1Basic Principle of RadarRCA Co. (American): Invented airplane-carried radar. (America): “New York” Cruiser equipped with radar. After WWII: As a navigation aids developed rapidly. China: Technique mainly from developed countries. Moder
9、n radar/ARPA: With computer, integrated navigation system (Loran, GPS, ECDIS,AIS), colour TV display Automatic bridge navigation system.Marine Radar and ARPAChapter 1Basic Principle of RadarRadar/ARPA, ECDIS, GPS/DGPS and data auto-pilot combined together will be future major navigation systemMarine
10、 Radar and ARPAChapter 1Basic Principle of Radar雷达发展历程雷达发展历程模拟信号处理模拟信号处理数字信息处理数字信息处理计算机信息处理计算机信息处理Marine Radar and ARPAChapter 1Basic Principle of Radar模拟信号处理模拟信号处理20世纪世纪90年代前，雷达设备采用电子管或晶体管，发年代前，雷达设备采用电子管或晶体管，发射功率较大，回波信号经接收系统实时处理，直接显射功率较大，回波信号经接收系统实时处理，直接显示在径向圆周扫描显示器（平面位置显示器，示在径向圆周扫描显示器（平面位置显示器，Plan
