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内容:测速照相机一般是采用多普勒
雷达
或者激光的方式测速的,手持式测速仪一般都是激光的,测速时需要对准汽车的反光部位比如车牌和车灯。,但是
雷达
就不需要了,所以固定式测速照相机应该都是用
雷达
。
室外公共场合采用微波取暖!
samhrc
12年11个月前
回复于
极客DIY
内容:引用第23楼婺源寻芳于2011-06-04 13:20发表的 :
雷达
的功率不比微波炉高。,
雷达
是脉冲,所以平均功率不高。,
雷达
检测的时候一个新兵好奇眼睛凑近拆开的波导管往里头看火花开关,结果眼瞎了。,军用大型
雷达
某些方面安全设计上允许不停机检修,不会出现微波烧烤活人的。,俺也见过一照片,固定式的大型相控阵
雷达
在不关机更换收发单元,那可是远程警戒用的,功率有几十万KW,人就在巨大天线阵面上爬。
自制USB雷达 --- 架设你自己的导弹防御系统
我说要有光
11年4个月前
回复于
无线电
内容:室内环境的话 最合适的应该还是可见光
雷达
DIY无人机载C波段(5.8G)合成孔径雷达遥感成像平台
smith
4年8个月前
回复于
无线电
内容:话说国外的那个袖珍合成孔径
雷达
能做到什么样的清晰度
填坑篇之FMCW雷达试制(完结)
雪馒头
3年4个月前
回复于
无线电
内容:你这个
雷达
的频率正好卡在通信频率上,不会有干扰的吗??
请教:怎样检测到超声波信号的存在?
闲着会生病的
8年10个月前
回复于
仪器仪表
内容:倒车
雷达
探头,可以发射、接收超声波,固定频率有3个,在40kHz~58kHz之间。
超声合成孔径成像
zx-16533
5年9个月前
发表于
电子技术
内容:如图,
雷达
在移动过程中照射目标,从目标开始被波束照射到目标照射结束的时间内
雷达
移动的距离即为合成孔径。,和通常的真实孔径
雷达
恰恰相反,这是合成孔径
雷达
比较奇特的一个特点。,在任一时刻,垂直于
雷达
速度矢量并过
雷达
的平面上的目标相对于
雷达
的径向速度为零,因此多普勒频偏也为零,此平面称为零多普勒平面。,由于
雷达
运动的速度$v$相比于
雷达
信号前进的速度$c$可以忽略不计,因此推导时可以近似看作
雷达
每次前进一段固定的距离,发出发射脉冲,在“原地”就收到了相应的回波信号。,由于
雷达
在运动,所以每次进行采样时,
雷达
到同一目标的斜距会发生变化,称为距离徙动(RCM)。
转帖:基于多相滤波的数字接收机的FPGA实现
miles
4年11个月前
回复于
无线电
内容:检测
雷达
信号的一看到南京的高校基本都和14所有关系
回 10楼(冒牌淡水鱼) 的帖子
zx-16533
11年3个月前
回复于
极客DIY
内容:那你还得搞定静音等,话说有那么大个发动机怎么可能静音,还有,你以为机库是看门大爷用肉眼看的么,你这东东用摄像头,
雷达
什么的一下就看出来了,还有因为有
雷达
,你这东西连飞到上空都难,别说飞进机库了
#无聊的改装电动自行车
小特斯拉圈圈
10年3个月前
回复于
极客DIY
内容:后面死角
雷达
(行驶中左右有靠近就 ...哈哈,装倒车
雷达
貌似很吊的样子。。。
自制USB雷达 --- 架设你自己的导弹防御系统
布布卡
11年4个月前
回复于
无线电
内容:换成激光发射接收 就成了 激光
雷达
。。。
请问有科学的解释相控阵雷达原理的吗,最好有图
samhrc
11年3个月前
回复于
仪器仪表
内容:咱发过资料
雷达
手册有一章是讲相控阵和其移相技术的。
很多航空航天相关文献(94 files)(from internet, pdf)
聪聪冲
4年6个月前
回复于
航空技术
喷气推进
内容:液体火箭推进增压输送系统.pdf液体火箭发动机自动调节.pdf世界导弹与航天发动机大全.pdf火箭发动机燃烧原理.pdf火箭发动机基础.pdf导弹现代结构设计.pdf弹道导弹、运载火箭控制系统设计与分析.pdf单脉冲
雷达
请教下,自己采购组件实现这样一套雷达的组装可行吗?
虎哥
1年9个月前
回复于
无线电
内容:最入门级的海事
雷达
也有30海里的探测距离吧,新的才一万多。
DIY简易5.8G FMCW雷达
娇姐姐
2个月9天前
回复于
无线电
内容:我也想做个
雷达
,怕无委会找麻烦
自制USB雷达 --- 架设你自己的导弹防御系统
BG8KIH
11年4个月前
回复于
无线电
内容:这个可以有,超声
雷达
,把超声波模块换成无线电就大爱了
5.8G FMCW式雷达的低成本实现总结报告 :(
wwz
7个月16天前
回复于
无线电
内容:你好,请问作者最后这个
雷达
的实现效果怎么样吖?
『原创』汽车行车雷达设想(非倒车雷达)
wenyue
15年9个月前
回复于
极客DIY
内容:呵呵,我的设计目的在首贴中说了,这个
雷达
的目的是在大雾、大雨等极端天气下,能见度非常低的情况下使用,非为开快车设计。,这个
雷达
的目的是可以发现前方车辆,避免追尾和出车祸。,在车速100KM时,制动距离是100M,是
雷达
的设计报警距离,可以避免其追尾的发生。
【降价打包¥150】100多个库存锂电池和200个库存液晶显示器低价打包了
1176764177
3年11个月前
回复于
跳蚤市场
内容:
雷达
?
自制USB雷达 --- 架设你自己的导弹防御系统
yuyue3106
10年8个月前
回复于
无线电
内容:记得以前看神州飞船发射的时候总会说USB
雷达
跟踪正常,遥测信号正常
关于我党的天气预报!
S.D.P
11年10个月前
回复于
大气科学
内容:有全国的单站
雷达
图像,范围从300-500km不等,覆盖绝大数一线城市和省会城市以及部分普通城市的。。。
有没有研究过FMCW雷达的大牛
wzh19940105
3年4个月前
回复于
无线电
内容:这种专业知识你需要买一本
雷达
原理而不是到论坛上来问
雷达的制作
lemoncap
16年3个月前
回复于
无线电
内容:我们可以搞个DIY:脉冲多普勒
雷达
,价格〈 50000 RMB。
微波炉磁控管改造雷达
ne555
9年1个月前
回复于
无线电
内容:以前的
雷达
就是用磁控管的 现在的不是,因为频率不稳
合成孔径雷达扫地面妙用
novakon
8年5个月前
回复于
无线电
内容:以后飞机带测距
雷达
,估计也算非法测绘了
请问下~我想弄个能烧掉飞行中的蚊子的激光器
litianyue
12年10个月前
回复于
强激光
内容:无方向性的扫射好了,不管有没有蚊子,定时大面积扫过,总能弄死蚊子,也不要火控
雷达
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