CN201638331U - Book electromagnetic anti-theft device - Google Patents
Book electromagnetic anti-theft device Download PDFInfo
- Publication number
- CN201638331U CN201638331U CN2010201666820U CN201020166682U CN201638331U CN 201638331 U CN201638331 U CN 201638331U CN 2010201666820 U CN2010201666820 U CN 2010201666820U CN 201020166682 U CN201020166682 U CN 201020166682U CN 201638331 U CN201638331 U CN 201638331U
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- magnetic field
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Abstract
The utility model relates to an anti-theft device, in particular to a book electromagnetic anti-theft device, which comprises a power supply module, a magnetic field detection module, a control module and a warning device. The utility model is characterized in that the power supply module, the magnetic field detection module and the warning device are respectively connected with the control module, and an amplifier, an analog-to-digital converter and a single chip are arranged on the control module, wherein the single chip is connected with the amplifier, the amplifier is connected with the analog-to-digital converter, the power supply module mainly adopts rectifying bridges such as lm317, lm337 and the like for converting 220v alternating current into +/-5v direct current capable of being output through steps such as rectification, wave filtration, voltage division and the like, and a linear magnetic field sensor warning device arranged in the magnetic field detection module can adopt a cylindrical small buzzer. The utility model has the obvious advantages of low cost, good effect, reasonable structure, simple operation, high reliability and the like.
Description
Technical field
The utility model relates to a kind of anti-theft device, is a kind of books electromagnetism anti-theft device specifically.
Background technology
At present the anti-theft measure of books pipe and bookstore is exactly nothing but common detecting gate, and a big crucial leak wherein: to the magnetic stripe demagnetization, and then sporting book band is gone out bookstore or library with strong magnet; On Qingdao, Lanzhou and other places, the news report of this type of book of stealing incident has been arranged, bookstore is with a toll of units up to ten thousand.
On the antitheft market of current books, just worked out detecting gate with magnet measuring ability, but its principle is that the magnet sense channel is integrated on the detecting gate, the mode of utilization emission and detection harmonic wave realizes the measuring ability of magnet, because this mode also can be reported to the police to common ferrous material, thereby the phenomenon of wrong report takes place.According to the message of the producer of Longkou City, Yantai, the detections binary channels price of this function is about 20,000 yuan, exceeds more than 10,000 yuan than common detecting gate, and price is extremely expensive.
Summary of the invention
The utility model is at the deficiency that exists in the existing books anti-theft technique, propose a kind of rational in infrastructure, use the books electromagnetism anti-theft device simple, that reliability is high.
A kind of books electromagnetism anti-theft device, comprise power module, magnetic field detection module, control module, alarm, it is characterized in that power module, magnetic field detection module and the alarm control module that is connected with control module respectively is provided with amplifier, analog to digital converter and single-chip microcomputer, wherein single-chip microcomputer is connected with amplifier, and amplifier is connected with analog to digital converter.
Power module in the utility model mainly adopts rectifier bridge, lm317, and lm337 etc. with the 220v alternating current, are to export the direct current of positive and negative 5v by step transitions such as rectification, filtering, dividing potential drops.
Be provided with linear magnetic field sensor in the magnetic field detection module in the utility model, field signal is converted into voltage signal,, make field signal be convenient to detect intuitively and handle through follow-up signal processing circuit.
Single-chip microcomputer in the utility model on the control module adopts STC12C5A16AD, is used to control the duty of whole device and alarm threshold etc. is set.
Alarm can adopt cylindrical little hummer in the utility model, is used for realizing reporting to the police.
The utlity model has that cost is low, effective, rational in infrastructure, simple to operate, the high advantage significantly of reliability.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
Accompanying drawing 2 is a kind of circuit theory diagrams of the present utility model.
Reference numeral: power module 1, magnetic field detection module 2, control module 3, alarm 4, amplifier 5, analog to digital converter 6, single-chip microcomputer 7.
Embodiment:
A kind of books electromagnetism anti-theft device, comprise power module 1, magnetic field detection module 2, control module 3, alarm 4, it is characterized in that power module 1, magnetic field detection module 2 and alarm 4 are connected with control module 3 respectively, control module 3 is provided with amplifier 5, analog to digital converter 6 and single-chip microcomputer 7, wherein single-chip microcomputer 7 is connected with amplifier 5, and amplifier 5 is connected with analog to digital converter 6.
The power module 1 main rectifier bridge that adopts in the utility model, lm317, lm337 etc. with the 220v alternating current, are to export the direct current of positive and negative 5v by step transitions such as rectification, filtering, dividing potential drops.
Be provided with linear magnetic field sensor in the magnetic field detection module 2 in the utility model, field signal is converted into voltage signal,, make field signal be convenient to detect intuitively and handle through follow-up signal processing circuit.
Single-chip microcomputer 7 in the utility model on the control module adopts STC12C5A16AD, is used to control the duty of whole device and alarm threshold etc. is set.
The utility model is in use powered by 1 pair of whole device of power module, linear magnetic field sensor in the magnetic field detection module 2 is gathered the field signal in the testing environment, and be converted to electric signal and send in the control module 3 that is connected with magnetic field detection module 2, the amplifier 5 of field signal in control module 3, the processing successively of analog to digital converter 6, by single-chip microcomputer 7 order of entering a judgement, and this order sent in the alarm 4, report to the police, it is low to the utlity model has cost, effective, rational in infrastructure, simple to operate, the high advantage significantly of reliability.
Claims (3)
1. books electromagnetism anti-theft device, comprise power module, magnetic field detection module, control module, alarm, it is characterized in that power module, magnetic field detection module and the alarm control module that is connected with control module respectively is provided with amplifier, analog to digital converter and single-chip microcomputer, wherein single-chip microcomputer is connected with amplifier, and amplifier is connected with analog to digital converter.
2. a kind of books electromagnetism anti-theft device according to claim 1 is characterized in that the single-chip microcomputer on the control module adopts STC12C5A16AD.
3. a kind of books electromagnetism anti-theft device according to claim 1 is characterized in that alarm can adopt cylindrical little hummer.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201666820U CN201638331U (en) | 2010-04-22 | 2010-04-22 | Book electromagnetic anti-theft device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201666820U CN201638331U (en) | 2010-04-22 | 2010-04-22 | Book electromagnetic anti-theft device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201638331U true CN201638331U (en) | 2010-11-17 |
Family
ID=43082835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201666820U Expired - Fee Related CN201638331U (en) | 2010-04-22 | 2010-04-22 | Book electromagnetic anti-theft device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201638331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064037A (en) * | 2012-12-28 | 2013-04-24 | 太原理工大学 | Burglar alarm device based on magnetic field sensor |
-
2010
- 2010-04-22 CN CN2010201666820U patent/CN201638331U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064037A (en) * | 2012-12-28 | 2013-04-24 | 太原理工大学 | Burglar alarm device based on magnetic field sensor |
| CN103064037B (en) * | 2012-12-28 | 2015-01-21 | 太原理工大学 | Burglar alarm device based on magnetic field sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20110422 |