JPS6413593U - - Google Patents
Info
- Publication number
- JPS6413593U JPS6413593U JP10681287U JP10681287U JPS6413593U JP S6413593 U JPS6413593 U JP S6413593U JP 10681287 U JP10681287 U JP 10681287U JP 10681287 U JP10681287 U JP 10681287U JP S6413593 U JPS6413593 U JP S6413593U
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic waves
- emits
- frequencies
- theft
- different
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
Description
第１図はこの考案にかかる盗難防止装置の一実
施例の構成を示すブロツク図、第２図は従来の盗
難防止装置の構成を示すブロツク図、第３図はタ
グ９が具備する電気回路の構成を示す図である。
１，２，１５……発振器、８……送信アンテナ
、９……盗難防止対象物装着片（タグ）、１０…
…受信アンテナ、１１ｂ……帯域通過フイルタ、
２０……スピーカ、２１……分配器、２２……第
１の検波器、２３……第２の検波器、２４……第
３の検波器、２８……第１の検波器、２９……第
２の検波器、３０……第３の検波器、３２……３
入力ＡＮＤ回路、３３，３４……トーンデコーダ
、３５……アナログスイツチ。
FIG. 1 is a block diagram showing the configuration of an embodiment of the anti-theft device according to this invention, FIG. 2 is a block diagram showing the configuration of a conventional anti-theft device, and FIG. FIG. 3 is a diagram showing the configuration. 1, 2, 15... Oscillator, 8... Transmission antenna, 9... Anti-theft object attachment piece (tag), 10...
...Receiving antenna, 11b...Band pass filter,
20... Speaker, 21... Distributor, 22... First detector, 23... Second detector, 24... Third detector, 28... First detector, 29... Second detector, 30...Third detector, 32...3
Input AND circuit, 33, 34... tone decoder, 35... analog switch.
Claims (1)
と、前記電磁波を受信するとともに、前記電磁波
と周波数の異なる複数の電磁波を再放射する盗難
防止対象物装着片と、前記再放射された複数の電
磁波を同時に受信した時にのみ警報を発生する受
信器とからなることを特徴とする盗難防止装置。 a transmitter that emits a plurality of electromagnetic waves having different frequencies; an anti-theft object attachment piece that receives the electromagnetic waves and re-emits the plurality of electromagnetic waves that have frequencies different from the electromagnetic waves; An anti-theft device comprising a receiver that generates an alarm only when receiving simultaneous signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10681287U JPS6413593U (en) | 1987-07-11 | 1987-07-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10681287U JPS6413593U (en) | 1987-07-11 | 1987-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6413593U true JPS6413593U (en) | 1989-01-24 |
Family
ID=31340658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10681287U Pending JPS6413593U (en) | 1987-07-11 | 1987-07-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6413593U (en) |
-
1987
- 1987-07-11 JP JP10681287U patent/JPS6413593U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0633726Y2 (en) | CW transceiver | |
| JPH01100550U (en) | ||
| JPH0313595U (en) | ||
| JPH036338U (en) | ||
| JPH0255759U (en) | ||
| JPS61140644U (en) | ||
| JPS6316397U (en) | ||
| JPH0375640U (en) | ||
| JPS60189867U (en) | radar device | |
| JPH0286275U (en) | ||
| JPH0476740U (en) | ||
| JPH03482U (en) | ||
| JPS62125043U (en) | ||
| JPS60147500U (en) | Receiver for play | |
| JPS61143352U (en) | ||
| JPS6443448U (en) | ||
| JPS6296796U (en) | ||
| JPS6451340U (en) | ||
| JPS6261547U (en) | ||
| JPS5883854U (en) | telephone receiving calling system | |
| JPS6325391U (en) | ||
| JPS6448975U (en) | ||
| JPH0353046U (en) | ||
| JPS63102344U (en) | ||
| JPH01126740U (en) |