查了一下，外文说的是就是雷达原理，用的三个电子管比硬币还小
VT-M532 VT RF Tubes
Miniaturized RF Tubes


used inside the VT M532
(Shown at left)

Proximity Fuzes
Proximity fuze technology was developed during WWII, and two types were produced.
The first (British) was used for anti-aircraft rockets and relied on optics. A sensor was calibrated for broad daylight. As the missile approached the target the daylight shining into that sensor was reduced. When the sensor was shaded enough, an electrical circuit would close and detonate the warhead. While successful, it was useless when it came to shooting at night.
The second concept (U.S.) applied radio waves, using the same principle as Radar. The fuze transmits a signal which is reflected by the target and received by the fuze. This reflected signal increases in strength as distance is reduced. When the reflected signal intensity reaches a certain level, a triggering circuit electrically fires the detonator.
These early radio "VT" fuzes were large and fragile, using mechanical and vacuum tube components, but they were very successful in a number of applications and used to good effect.

With the advent of transistor technology in the 1950's electronics could be reduced in size, resulting in smaller more robust fuzes which could be applied to smaller munitions.

老外的论坛上面也讨论过这个东西，给了几个图纸，但是不知道哪个是美军用的，话说有人能帮忙解读一下么
地址：XXXXXXXXXXXXXXXXXXXXXXXXXXX/stem/res/XXXXXXXml

引用 warmonkey:

额，当年的高科技，现在果然已经平民化了。

话说这个的探测范围有多大，还是只能探测运动的物体

引用 3DA502:
单管多普勒

那个发电机是怎么运转的，感觉是靠风力推动旋转，正好解决保险问题

不是靠发电机，而是化学电池，炮弹发射时撞破玻璃管，里面的电解液流出来和电极构成电池，和水雷一样

引用 rb-sama:
看了一下楼主贴的原文部分，简略翻译文章大意是：近炸引擎有两种类型，一种是依靠日光强度变化的，引信上面搭载一个光传感器，调节至日光强度，当靠近飞行器的时候，光会被挡住，光强发生变化达到阈值触发雷管。

终于有版主出来分析了，应该就是第三个电路吧，我也试着在淘宝上面找了一些模块，发现有的有IC，都的看起来没有IC，怀疑就是第三个电路的原理。看看能否用9018改造一下，话说这种引信的频段为什么非要工作在那么高，是为了减小天线的面积？，900M~1G hz可以用吗。

现在战争离我们还有一定距离，不过个人觉得这种模块还是挺有用的，比如和摄像头一起配合，放在野外，可以拍一些小动物经过的照片什么的，而使用超声模块可能会干扰到动物

好吧，逛了一圈淘宝，发现这个多普勒感应已经烂大街了。。。
不过如果早几年做出来的话，估计可以赚一笔发点财