CN1011738B - 动态图像雷达 - Google Patents

动态图像雷达

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Publication number
CN1011738B
CN1011738B CN 88103154 CN88103154A CN1011738B CN 1011738 B CN1011738 B CN 1011738B CN 88103154 CN88103154 CN 88103154 CN 88103154 A CN88103154 A CN 88103154A CN 1011738 B CN1011738 B CN 1011738B
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China
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image
microwave
antenna
fluorescent screen
spherical
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CN 88103154
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CN88103154A (zh
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葛晓峰
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Individual
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Priority to CN 88103154 priority Critical patent/CN1011738B/zh
Publication of CN88103154A publication Critical patent/CN88103154A/zh
Publication of CN1011738B publication Critical patent/CN1011738B/zh
Expired legal-status Critical Current

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Abstract

本发明属于电子技术领域,能使雷达看到活动的目标图像,把现有抛面天线改为球面天线,利用球面镜成像原理,使雷达回波在球面天线焦点附近,成一个微波潜像,在成像处放一块萤光板,萤光板在微波辐射激发下发光,把微波像变成可见光的像,用摄像机拍摄反接在闭路电视上播出动态图像。

Description

本发明属于电子领域,目前微波雷达难以看清活动图像,本发明目的是使雷达看到活动图像。原理是:用亚毫米波段的雷达发射和接收器,作动态图像雷达。可见光经过球面镜可以成像,亚毫米波和光的特性一样,只不过波长略长于可见光而已,也有波粒二象性,其粒的特性和可见光一样,可以聚焦也可以成像,利用波粒二象性中粒的特性也可使它象可见光一样,经过球面镜后成像,用球面天线做接收天线,球面天线相当于球面镜,可使雷达回波在球面天线焦点附近成一个肉眼看不见的微波潜像。
在成像处放一块萤光板,因为萤光板在微波辐射下会发光。
萤光板可在微波像辐射下发光,微波像通过辐射的萤光板,把微波像变成可见光的动态图像,用高灵敏的微光摄像机拍摄此像,在接在闭路电视上,便可看到目标活动图像,因为萤光粉只能在一定波段的微波辐射下发光,所以使它发光的带宽很窄,不会在其它频率杂波干扰下发光,选择性很好。
可见光是一个波长携带一个像素,一个像素的大小等于一个波长。
亚毫米波虽波长较长,但一是每一个波长携带一个像素,一个像素尺寸小于一个毫米,像素比可见光略粗,一个十米长的飞机,可组成一万个像素,边长各为十公分的萤光板可容纳一万个像素。也就是一万个像素一帧图像,完全可分清目标的轮括。
图1是动态图像雷达接收系统原理示意图
图2是萤光板和摄像机的放大图
图1中1.是目标,2.球面雷达接收天线,
3.是萤光板和电视摄像机支架,并可通过调节像距,也就是萤光板的位置。
4.视频电缆
5.萤光板面积十平方厘米左右涂上硫化锌或其它萤光粉,置于微波成像处,并装在透电波不透光的暗盒里,以防环境杂光干扰。
6.微光电视摄像机,摄像机也装在暗盒里。
7.蒙在暗盒上的黑纸,防止杂光进入但可透微波。
8.闭路电视,通过它可看到活动图像。天线的尺寸焦距和萤光板的位置(像距)的计算公式与球面镜和反射式天文望远镜的计算公式一样。以观察十五公里以外的二百米长军舰目标为例,所需在萤光板上成十公分的像。球面天线的象距和焦距及球面镜半径的计算公式是,放大率K= 0.1/(200米) =0.0005 K= (v)/(u) V=15000×0.0005=4.5米 焦距为 1/(v) + 1/(u) = 1/(f) F=4.498米球面半径为9.996米,天线口径根据需要自定。图2是萤光板和摄像机的放大图,摄像机和萤光板同装于一个透微波像不透光的塑料暗盒里,以防环境光干扰,摄像机镜头和萤光板的距离是事先调好的固定暗盒里,整个暗盒可以调节位置,通过 支架的调节装置,调节与球面天线的距离(象距),图中1.萤光板、2.微波像、3.微波、4.光像、5.光、6.高灵敏微光摄像机、7.黑纸、8.齿条、9.燕尾楔、10.电机、11.蜗杆用电机带动。通过控制电机正反转控制齿条及暗盒伸缩调节与天线的距离(象距)。12.支架、13.输出电缆。
图3是图2的正视图:
1.是燕尾槽用于把暗盒固定在支架上并可滑动、2.燕尾楔上的齿条、3.蜗轮、4.电机、5.暗盒、6.支架。
因为接收天线是使目标反射的散射波成像,就象透镜使景物的散射光成像一样,是散射波成像,不是扫描成像,所以发射天线的发射波辐射目标就象光源照射景物一样,波束可以散开覆盖整个目标,散射角和接收天线的“视角”相同,不需聚焦的很细。发射天线和接收天线共同对准同一方向联动,平时可以360度旋转,就象摄象机拍摄四周景物一样,搜索目标,发现目标后也可跟踪观察,象看电视转播一样,看清远处目标。

Claims (1)

  1. 一种能看到目标景像图像的微波雷达,其特征在于:
    1、把现有抛面接收天线改为球面天线,利用球面镜使光成像原理,使波长略长于光波的亚毫米波成像,在球面天线上成像。
    2、在成像处放置一块萤光板,微波潜像辐射在萤光板上,微波像通过激发萤光板发光,使微波像变成可见的光像。
    3、用微光电视摄像机拍摄在萤光板上的像,接在闭路电视上,播出图像。
CN 88103154 1988-06-04 1988-06-04 动态图像雷达 Expired CN1011738B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 88103154 CN1011738B (zh) 1988-06-04 1988-06-04 动态图像雷达

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 88103154 CN1011738B (zh) 1988-06-04 1988-06-04 动态图像雷达

Publications (2)

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CN88103154A CN88103154A (zh) 1988-11-02
CN1011738B true CN1011738B (zh) 1991-02-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8692708B2 (en) * 2010-03-30 2014-04-08 Sony Corporation Radiometric imaging device and corresponding method

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CN88103154A (zh) 1988-11-02

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