磁圈开锁器

carolfeeling

如果你家里也是使用的一种电动机械锁（electromechanical lock），相信你一定会对这段视频感兴趣。只要这么一个环形的磁铁，就可以轻而易举的将门锁打开……2 K; o) b  i* U! ~) L
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A new attack on electronic locks: The magnetic ringJune 16th, 2008 by Barry www2.tvboxnow.com5 i, w( B6 |. y2 x+ X2 ~
There has been quite some speculation about this video (YouTube) of a magnetic ring that is used to open some model of Uhlmann & Zacher lock. By now it is confirmed by the company itself the trick works. They claim a software update will fix the problem (and even log opening attempts).
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(The ring used in the video now has a name: ‘the ring of the devil’ and is already available on the market (just 25 euro!).
/ Q: B  L/ l2 _2 S" pAnd the questions now are: What is in the ring, how does it work and what locks are affected? www2.tvboxnow.com# e# A1 |, W0 X$ r% B6 p' ~
Well … I have some answers. Saturday I received my own magnetic ring and can give you some details.tvb now,tvbnow,bttvb) K' |. n  c: H9 u& h  v2 [
Some people thought the ring was completely magnetic, but this is not the case. The ring is made out of aluminum and there are four strong magnets inside. The spacing is 90° and the magnets are mounted N, S, N, S. On this image you can see four metal keyrings that are stuck to the ring by the magnetic fields. So far I did not pry open my ring to see what it looks like inside.
. F2 }; W: u; T+ z% [8 qtvb now,tvbnow,bttvbThe next question is why does this open (some) electronic locks? Electronics is not my strongest point (as you could have read in my previous posting), but by now I understand a little more about it.
5 l* z4 G6 G7 _( L( Z7 E! ~公仔箱論壇[size=+2]Solenoid VS Electro motor公仔箱論壇' x  ]" s" ~0 d3 P; x5 @
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; |! w% s3 \% X( Z2 P2 Y; Jmage: Winkhaus BlueChip solenoid vs electro motor from Burgwachter (ring will NOT open this lock!)