CN2795969Y - Broad path low frequency electromagnetic anti-theft alarm - Google Patents
Broad path low frequency electromagnetic anti-theft alarm Download PDFInfo
- Publication number
- CN2795969Y CN2795969Y CN 200520069027 CN200520069027U CN2795969Y CN 2795969 Y CN2795969 Y CN 2795969Y CN 200520069027 CN200520069027 CN 200520069027 CN 200520069027 U CN200520069027 U CN 200520069027U CN 2795969 Y CN2795969 Y CN 2795969Y
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- circuit
- burglar alarm
- antenna
- receiving circuit
- low frequency
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Abstract
The utility model relates to an anti-theft alarm device, particularly an anti-theft alarm device for articles in various libraries, book and video stores, supermarkets, etc. The utility model comprises a main engine of the anti-theft alarm device, an antenna, a detecting gate, an audible and visual alarm device and a digital display, wherein the inner part of the main engine of the anti-theft alarm device is provided with a transmitting circuit, a receiving circuit, a tracking scanning circuit and a DSP digital technique processor. The tracking scanning circuit controls the transmitting circuit and the receiving circuit to work in an alternate mode. The transmitting circuit transmits an electromagnetic wave signal through the antenna, the antenna returns a receiving signal to the receiving circuit, the receiving circuit conveys the signal to the DSP digital technique processor. The utility model has novel design and adopts the DSP digital processing technology to have the advantages of high detection sensitivity, wide detection channel and strong anti-interference ability.
Description
Affiliated technical field
The utility model relates to a kind of burglar alarm, and the antitheft alarm of commodity detection is carried out in especially a kind of supermarkets such as libraries and books, phonotapes and videotapes that are widely used in.
Background technology
The alarm that is used for commodity anti-theft mainly is to reach the warning purpose by the signal that detects magnetic stripe, and its principle is by being installed in the anti-theft tag in the article, and promptly magnetic stripe carries out reporting to the police after the signal analysis to electromagnetic influence in the surveyed area.Social at present used burglar alarm generally all has the following disadvantages: it is little 1, to detect distance, and width of channel is no more than 80cm; 2, used anti-theft tag size is long, generally more than 8cm; 3, forming sense channel must be by more than the two fan door, and the installation balance of detecting gate is required very high, and the balance that the detection sensitivity of instrument is subject to detecting gate is disturbed very big, and the hyperchannel phase mutual interference of composition is very big, job insecurity.
Summary of the invention
In order to overcome the deficiency of at present existing burglar alarm, the utility model provides a kind of novel fat pipe burglar alarm.
The technical scheme that realizes the utility model purpose is: a kind of Wide Channel Low Frequency Electromagnetic Burglar Alarm, has burglar alarm mainframe, antenna, detecting gate, audible-visual annunciator and digital indicator, antenna is arranged at detecting gate inside, audible-visual annunciator links to each other with burglar alarm mainframe with digital indicator, be provided with the radiating circuit that is used for launching electromagnetic wave in the burglar alarm mainframe, be used to receive electromagnetic receiving circuit, the tracking that is used to control radiating circuit and receiving circuit alternation scans circuit and digital technology processor DSP, radiating circuit, receiving circuit scans circuit with tracking and is connected, and receiving circuit is connected with digital technology processor DSP.
Further: detecting gate quantity is 1～5 fan, and straight line is installed and formed hyperchannel side by side, and different with common sense channel is two passages about the utility model can form by 1 fan detecting gate.
Further: the adjacent maximum spacing of detecting gate is 1.2m, has increased passage and has detected distance.
Receive and the effect that transmits in order to strengthen, more further: antenna is the radar type antenna.
The utility model modern design adopts the DSP digital processing technology, the detection sensitivity height, and sense channel is wide, strong anti-interference performance.
Description of drawings
Fig. 1 is the utility model course of work block diagram;
Fig. 2 is the utility model scheme of installation.
Among the figure: 1. detecting gate 2. burglar alarm mainframes 3. sense channels 4. cables
Embodiment
The utility model will be further described below in conjunction with accompanying drawing and embodiment.
A kind of Wide Channel Low Frequency Electromagnetic Burglar Alarm as shown in Figure 1, has burglar alarm mainframe, antenna, detecting gate, audible-visual annunciator and digital indicator, antenna is arranged at detecting gate inside, audible-visual annunciator links to each other with burglar alarm mainframe with digital indicator, be provided with radiating circuit in the burglar alarm mainframe, receiving circuit, tracking scans circuit and digital technology processor DSP, scan circuit control radiating circuit and receiving circuit alternation by tracking, antenna adopts the radar type antenna, have simultaneously and receive and emission function, radiating circuit is launched the electromagnetic wave signal of certain power and certain frequency through antenna, by antenna received signal is returned and be fed to receiving circuit, receiving circuit arrives digital technology processor DSP with signal conveys again.Wide Channel Low Frequency Electromagnetic Burglar Alarm of the present utility model adopts the power supply of 220V power supply.
Its principle of work is: scan circuit through tracking the tracking of signal is scanned analysis, start radiating circuit, radiating circuit is launched the electromagnetic wave signal of certain power and certain frequency through the radar type antenna, in detection zone, form electromagnetic field, when in detection zone, running into the article that have anti-theft tag, the electromagnetic field underexcitation goes out abundant even-order harmonic, receiving circuit receives the signal of characteristic frequency, and receiving circuit will be sent to digital technology processor DSP again through the signal of Screening Treatment and handle.When alerting signal, just can demonstrate parameters such as signal intensity on the instrument digital display screen, audible-visual annunciator sends alerting signal simultaneously, and the prompting staff in time handles.
Mounting means as shown in Figure 2, when with a fan detecting gate, the left and right sides of detecting gate is a passage, when the many fans of usefulness detecting gate, can form hyperchannel uses, maximum burglar alarm mainframes can be controlled four sense channels that five fan detecting gates are formed simultaneously, and sense channel can reach 1.2m apart from maximum, and realize the subchannel warning.
Claims (4)
1. Wide Channel Low Frequency Electromagnetic Burglar Alarm, has burglar alarm mainframe, antenna, detecting gate, audible-visual annunciator and digital indicator, antenna is arranged at detecting gate inside, audible-visual annunciator links to each other with burglar alarm mainframe with digital indicator, it is characterized in that: be provided with the radiating circuit that is used for launching electromagnetic wave in the burglar alarm mainframe, be used to receive electromagnetic receiving circuit, the tracking that is used to control radiating circuit and receiving circuit alternation scans circuit and digital technology processor DSP, radiating circuit, receiving circuit scans circuit with tracking and is connected, and receiving circuit is connected with digital technology processor DSP.
2. a kind of Wide Channel Low Frequency Electromagnetic Burglar Alarm according to claim 1 is characterized in that: described detecting gate quantity is 1～5 fan, and straight line is installed and formed hyperchannel side by side.
3. a kind of Wide Channel Low Frequency Electromagnetic Burglar Alarm according to claim 1 is characterized in that: the adjacent maximum spacing of described detecting gate is 1.2m.
4. a kind of Wide Channel Low Frequency Electromagnetic Burglar Alarm according to claim 1 is characterized in that: described antenna is the radar type antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520069027 CN2795969Y (en) | 2005-02-05 | 2005-02-05 | Broad path low frequency electromagnetic anti-theft alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520069027 CN2795969Y (en) | 2005-02-05 | 2005-02-05 | Broad path low frequency electromagnetic anti-theft alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2795969Y true CN2795969Y (en) | 2006-07-12 |
Family
ID=36813721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520069027 Expired - Fee Related CN2795969Y (en) | 2005-02-05 | 2005-02-05 | Broad path low frequency electromagnetic anti-theft alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2795969Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324164A (en) * | 2011-09-13 | 2012-01-18 | 常州市科晶电子有限公司 | Double-frequency detecting channel type antitheft system |
| CN102622816A (en) * | 2007-09-25 | 2012-08-01 | 踏途游戏设计室有限责任公司 | Coin operated entertainment system |
-
2005
- 2005-02-05 CN CN 200520069027 patent/CN2795969Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622816A (en) * | 2007-09-25 | 2012-08-01 | 踏途游戏设计室有限责任公司 | Coin operated entertainment system |
| CN102622816B (en) * | 2007-09-25 | 2015-07-15 | 踏途游戏设计室有限责任公司 | Coin operated entertainment system |
| CN102324164A (en) * | 2011-09-13 | 2012-01-18 | 常州市科晶电子有限公司 | Double-frequency detecting channel type antitheft system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Changzhou Kejing Electronics Co., Ltd. Assignor: Bai Wenxin Contract fulfillment period: 2007.5.10 to 2012.5.10 Contract record no.: 2008320000791 Denomination of utility model: Broad path low frequency electromagnetic anti-theft alarm Granted publication date: 20060712 License type: Exclusive license Record date: 20081012 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.5.10 TO 2012.5.10; CHANGE OF CONTRACT Name of requester: CHANGZHOU CITY KEJING ELECTRONICS CO.,LTD. Effective date: 20081012 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060712 |