CN201278182Y - Electromagnetic bidirectional intermodulation intelligent anti-theft apparatus - Google Patents
Electromagnetic bidirectional intermodulation intelligent anti-theft apparatus Download PDFInfo
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- CN201278182Y CN201278182Y CNU2008200238664U CN200820023866U CN201278182Y CN 201278182 Y CN201278182 Y CN 201278182Y CN U2008200238664 U CNU2008200238664 U CN U2008200238664U CN 200820023866 U CN200820023866 U CN 200820023866U CN 201278182 Y CN201278182 Y CN 201278182Y
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Abstract
An electromagnetic type two-way intermodulation intelligent anti-theft device comprises integral coil combinations formed by emitting coils and receiving coils and a monitoring passage formed in such a way that two integral coil combinations are correspondingly arranged, wherein the emission of a monitoring magnetic field is actuated by adopting a sine wave emitting signal source, a phase locking scanning timepiece which is synchronously generated and has N frequency multiplications is taken as the checkout control for receiving signal locking phases, and the two emitting coils mutually correspond for the emitting of the monitoring magnetic field, the two receiving coils synchronously receive signals, thereby the two-way intermodulation of the emitting of the monitoring magnetic field and the receiving of the signals is achieved. When the width of the monitoring passage is 100 cm, an anti-theft label with the length of 3.2 cm can be used to meet the requirements of practical work, and the monitoring passage can monitor anti-theft labels arranged on a commodity which takes a metal film and a metal box as external packages and a commodity which contains liquid ingredients. The electromagnetic type two-way intermodulation intelligent anti-theft devices is suitable for the anti-theft of various supermarkets and is especially suitable for the anti-theft of open type business locations for selling tobacco, wine, cosmetic, medicine, and the like.
Description
Affiliated technical field
The two-way intermodulation intelligent anti-theft device of the electromagnetic type that the utility model relates to is applicable to the commodity anti-theft of all kinds of supermarkets, pharmacy, cosmetics shop and various brand shops open type management place.In particular for broad go out the admission mouth and to anti-theft tag less dimensional requirement is arranged and be used for metal film or can as external packing with contain the commodity of liquid composition.
Background technology
At present, on the market traditional electromagnetic type anti-theft device often be occasions such as bookstore, library, record shop as antitheft means, the working method of such anti-theft device is the monitoring channel of forming with separate transmitting coil, receiving coil.Because being unidirectional emission of magnetic field and signal, such anti-theft device working method receives.The used signal source of emission of magnetic field is the near sinusoidal ripple signal that single square-wave signal forms behind integration, launches magnetic field like this and just contains abundant harmonic wave composition, thereby reduce the actual monitoring effect in emission magnetic field greatly.Effective monitoring magnetic field in the monitoring channel is less than half of monitoring channel zone to be monitored.Transmitting coil and receiving coil mutual restriction in addition, disturbed or people rocks the false alarm that Shi Junhui causes received signal as the either party, or quits work because of signal blockage.This type of anti-theft device is because of the restriction of its system performance, and the monitoring channel width is generally less than 70cm, and used anti-theft tag length can effectively be implemented antitheft monitoring when 10-16cm.
For general supermarket, generally more than 90cm, used anti-theft tag length is because of the diversity of commodity for its channel width that goes out the admission mouth, and its size is short as much as possible, and can be at metal film, can as external packing with contain on the commodity of liquid composition and use.Simultaneously, the price of used anti-theft tag is low as much as possible, to reduce the use cost of anti-theft device.
Summary of the invention
Traditional electrical magnetic-type anti-theft device monitoring channel is narrow, anti-theft tag is long in order to overcome; the monitoring effect that its emission magnetic field reduces because of the harmonic wave composition; and the easily disturbed and defectives such as shutdown of received signal; the two-way intermodulation intelligent anti-theft device of the utility model electromagnetic type fundamentally solves the problem that traditional electrical magnetic-type anti-theft device exists; its monitoring channel width is greater than 100cm, can accurately monitor be installed in contain liquid composition commodity and with metal film, can as the anti-theft tag on the external packing commodity.
The technical scheme that its technical matters that solves the utility model adopts is to be linked to each other in proper order with A road power amplifier, A transmitting coil and B road power amplifier, B transmitting coil by sine-wave generator, power amplifier driving.Under primary processor control, produce the required pure sinusoidal wave transmiting signal source of this device monitoring emission of magnetic field, and finish the emission in monitoring magnetic field.The phase-locked scanning output end of sine-wave generator links to each other with the phase-locked phase-locked control that detects of phase-locked phase-locked control, the B that detects of A, A receiving coil and A bootstrapping is amplified, A is phase-locked detects and the respective input of primary processor links to each other in proper order, and the B receiving coil amplifies with the B bootstrapping, B is phase-locked detects and the respective input of primary processor links to each other in proper order.Sine-wave generator that produce with sinusoidal wave transmiting signal source homophase and N phase-locked scan clock of frequency multiplication, control phase-locked detecting, finish the monitoring magnetic field that is launched of picking up and activated the bootstrapping amplification of anti-theft tag electric signal, phase-locked detecting, and deliver to primary processor and declare the calculation processing do digitizing by receiving coil.Constitute integrated coil combination by A transmitting coil and A receiving coil are compound, constitute integrated coil combination by B transmitting coil and B receiving coil are compound.Transmitting coil as the monitoring emission of magnetic field adopts 2 coil winding and homophase coiling, compares with a coil winding, improves launch monitor magnetic field and effectively covers, and simultaneously, reduces receiving coil basis level.The receiving coil that picks up as the anti-theft tag electric signal that is launched the activation of monitoring magnetic field adopts the coiling of " 8 " word winding, and the basic level of received signal is repaired in the displacement that the central folding of utilization finishing " 8 " word winding returns the benefit.Form by two corresponding installations of integrated coil combination at the anti-theft device that a typical case installs.Receiving coil in each integrated coil combination is in the electric signal that receives the anti-theft tag refraction that same integrated coil combination internal emission line circle activated like this, also will receive the electric signal of the anti-theft tag refraction that corresponding integrated coil combination internal emission line circle activated.Based on two transmitting coils is separate emission, and emission magnetic field be mutual, the electric signal that two receiving coil receptions simultaneously itself and the anti-theft tag that the other side's emission magnetic field is mutually activated reflect, so two-way intermodulation technology is achieved at this.Its monitoring performance of the anti-theft device of typical case's installation is undoubtedly four times of traditional electrical magnetic-type anti-theft device.Receiving coil received signal in two integrated coil combination is delivered to primary processor respectively and is done the digitizing of intelligence and declare to calculate and handle, thereby guaranteeing that two received signals are handled can still can independent separately operate as normal under various disturbed conditions.Avoid the shutdown that causes because of various interference or wrong information processing.
The beneficial effects of the utility model are that applied range is fit to all kinds of supermarkets and extensive stock and uses as antitheft means.Antijamming capability is strong, can work under various environment.Use cost is low, and the anti-theft tag that adopts home made materials to make has extremely low price, and volume is little, and the anti-theft tag minimum dimension only is 32 * 1 * 0.2mm, be fit to installation volume than on the petty commodities as cosmetics, medicine etc.Verified with traditional electromagnetic type anti-theft device is compared, transmitting coil, its superior performance of the integrated coil combination of receiving coil, two-way intermodulation technology makes two emission magnetic fields interlaced overlapping, integral multiple improves magnetic field, monitored area and covers, and strengthens to be launched the effective value that anti-theft tag refraction electric signal is activated in monitoring magnetic field.In actual use can be according to customer requirements and destination object on-the-spot and that monitored, constitute the monitoring anti-theft device of a minimum with an integrated coil combination, also can constitute a typical monitoring anti-theft device, can also a plurality of integrated coil combination constitute multichannel monitoring anti-theft device by 2 integrated coil combination.So far the utility model has the advantages that conspicuous.
Description of drawings
In order better to understand technical characterictic of the present utility model and details, do a detailed description in conjunction with following accompanying drawing.The similar part of similar digitized representation in the accompanying drawing.
Fig. 1 is a block scheme, and the embodiment of the anti-theft device example that the utility model technology finishes is shown
Fig. 2 is a block scheme, and the embodiment of sine-wave generator example in the burglary-resisting system of finishing according to the utility model technology further is shown.
Fig. 3 A, Fig. 3 B, Fig. 3 C illustrate oblique angle geometric configuration transmitting coil respectively, receiving coil and integrated coil combination example.
Fig. 4 A, Fig. 4 B, Fig. 4 C illustrate elliptic geometry shape transmitting coil respectively, receiving coil and integrated coil combination example.
Embodiment
For explanation is easily understood, this paper is together with its various exemplary case explanation the utility model technology.But the insider will appreciate that, can realize the feature and advantage of the utility model technology under various configurations.Thereby each embodiment that understands this paper explanation provides in a schematic way, rather than restrictive.
Fig. 1 is a block scheme, and the part example of the two-way intermodulation intelligent anti-theft device of the utility model electromagnetic type is shown.Under primary processor (1) control, produce one by sine-wave generator (2) and be used to monitor the required sinusoidal wave transmiting signal source of emission of magnetic field.Also produce a phase-locked scan clock simultaneously for sinusoidal wave transmiting signal source homophase 2 frequencys multiplication, 4 frequencys multiplication, 8 frequencys multiplication.
In conjunction with Fig. 2, finish clock division by N the frequency divider of scale-of-two (15) in the sine-wave generator (2) to clock source (14), link to each other by N frequency divider of output terminal and scale-of-two (15) input end of clock source (14).N frequency divider of scale-of-two (15) output terminal links to each other with label (17) to label (18) current-limiting resistance upper end respectively.Label (17), label (18) current-limiting resistance lower end link to each other with label (19) integrating capacitor, produce sinusoidal waveform, and transport to the input end of sinusoidal-shaped phase tranformation (16).Finish the power amplifier driving by the input end that sinusoidal-shaped phase tranformation (16) offset of sinusoidal waveform is done to deliver to power amplifier driving (3) by its output terminal in further refinement purification back.The output terminal that drives (3) by power amplifier is done further power amplification to the input end of A road power amplifier (4), B road power amplifier (5) respectively, does this device monitoring emission of magnetic field to A transmitting coil (6), B transmitting coil (8) respectively by A road power amplifier (4) output terminal, B road power amplifier (5) output terminal again.
The frequency division number of times of N frequency divider of scale-of-two (15) is identical to current-limiting resistance label (18) progression with current-limiting resistance label (17).Actual frequency division selection of times only is subject to the requirement of offset of sinusoidal ripple precision, and the frequency division number of times is many more, and the precision of the sine wave of its generation is high more.
The phase-locked scan clock that is produced synchronously by N the frequency divider of scale-of-two (15) in the sine-wave generator (2) is delivered to that A is phase-locked and is detected through phase-locked scanning output end on the port of phase-locked control of phase-locked the detecting of phase-locked control, B (13) of (12).
N frequency divider of scale-of-two (15) can be finished by the different model binary counter that different company produces, and also can adopt programmable logic device (PLD) to finish, and is not subjected to the restriction of manufacturer and model equally.
The electric signal that A receiving coil (7), B receiving coil (9) are born by the anti-theft tag refraction that activates in A transmitting coil (6), B transmitting coil (8) the institute launch monitor magnetic field receives.A receiving coil (7) links to each other with the input end that (10) are amplified in the A bootstrapping, and B receiving coil (9) links to each other with the input end that (11) are amplified in the B bootstrapping.(10) are amplified in bootstrapping, (11) finish the effective amplification to the anti-theft tag refraction electric signal that is activated, and the basic level that launch monitor magnetic field is produced is done effectively to suppress simultaneously.The output terminal of A bootstrapping amplification (10) detects (12) with A is phase-locked input end links to each other, and the output terminal of B bootstrapping amplification (11) detects (13) with B is phase-locked input end links to each other.Under the control of phase-locked scan clock, A is phase-locked to detect further phase-locked the detecting of received signal work that phase-locked the detecting of (12) B (13) sent here each autocorrelative bootstrapping amplification (10), (11) respectively.The output terminal that A is phase-locked to detect (12) is delivered to primary processor (1) respective input mouth with the signal that detects and is made digitized processing.The output terminal that B is phase-locked to detect (13) is delivered to primary processor (1) respective input mouth with the signal that detects and is made digitized processing.
A transmitting coil (6) and the integrated coil combination of A receiving coil (7);
B transmitting coil (8) and the integrated coil combination of B receiving coil (9).
Fig. 3 A is that geometric configuration is the transmitting coil of bevel, and label (20) is the outer winding of transmitting coil, and label (21) is the interior winding of transmitting coil, and two groups of coils are the homophase coiling.
Fig. 3 B is that geometric configuration is the receiving coil of bevel, and coil is the coiling of " 8 " word winding.Label (22) is the coil winding of receiving coil.Label (23), label (24) are turned back a little for receiving coil " 8 " word winding.
Fig. 3 C is the synoptic diagram of transmitting coil and the compound integrated coil combination of receiving coil.Heavy line is a transmitting coil, and fine line is a receiving coil.
Fig. 4 A is that geometric configuration is oval-shaped transmitting coil.Label (25) is the outer winding of transmitting coil, and label (26) is the interior winding of transmitting coil, the coiling of two groups of coil homophases.
Fig. 4 B is that geometric configuration is oval-shaped receiving coil, and coil is the coiling of " 8 " word winding, and label (27) is the coil winding of receiving coil.Label (28), label (29) are turned back a little for receiving coil " 8 " word winding.
Fig. 4 C is the synoptic diagram of transmitting coil and the compound integrated coil combination of receiving coil.Heavy line is a transmitting coil, and fine line is a receiving coil.
According to Fig. 3 C, shown in Fig. 4 C, the geometric shape of the geometric shape of transmitting coil winding and receiving coil winding is made according to requirement of engineering, can be identical or close, also can be inequality and not close, two geometric configuration main bodys of transmitting coil and receiving coil are parallelizable as integrated coil combination, also can intersect combination as integrated coil each other, transmitting coil winding and receiving coil winding can adopt tightly coupled binding mode to constitute and install and fix, can adopt separately also independently that mode constitutes and installs and fixes, but the transmitting coil geometric center must overlap on an axle center with the receiving coil geometric center.
Claims (5)
1, the two-way intermodulation intelligent anti-theft device of electromagnetic type is characterized in that: comprises,
Driving (3) by sine-wave generator (2), power amplifier links to each other with A road power amplifier (4), A transmitting coil (6) and B road power amplifier (5), B transmitting coil (8) order;
By the phase-locked scanning output end of sine-wave generator (2) detect (12) phase-locked control with A is phase-locked, B is phase-locked detects (13) phase-locked control and link to each other;
Link to each other in proper order by the respective input that (10) are amplified in A receiving coil (7) and A bootstrapping, A is phase-locked to detect (12) and primary processor (1);
Link to each other in proper order by the respective input that (11) are amplified in B receiving coil (9) and B bootstrapping, B is phase-locked to detect (13) and primary processor (1);
Constitute integrated coil combination by A transmitting coil (6) and A receiving coil (7);
Constitute integrated coil combination by B transmitting coil (8) and B receiving coil (9).
2, device according to claim 1 is characterized in that:
Sine-wave generator (2), by the frequency division resistance of clock source (14), n frequency divider of scale-of-two (15) and label (17), label (18), label (19) integrating capacitor and sinusoidal-shaped phase tranformation (16) are formed.
3, according to the described device of claim 1, it is characterized in that:
A transmitting coil (6), B transmitting coil (8) are by the interior loop winding, and the exterior loop winding constitutes, and are the coiling that is connected together;
The bevel transmitting coil, label (21) is the interior loop winding, label (20) is the exterior loop winding;
The elliptical radiation coil, label (26) is the interior loop winding, label (25) is the exterior loop winding;
4, according to the described device of claim 1, it is characterized in that:
A receiving coil (7), B receiving coil (9) are made of the coil of " 8 " word winding;
The bevel receiving coil, label (22) is the receiving coil winding, label (23) label (24) is turned back a little for receiving coil " 8 " word winding;
Oval receiving coil, label (27) is the receiving coil winding, label (28) label (29) is turned back a little for receiving coil " 8 " word winding.
5, according to the described device of claim 1, it is characterized in that:
Transmitting coil and receiving coil are when constituting integrated coil combination, and the geometric center of its transmitting coil and the geometric center of receiving coil are on same axle center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200238664U CN201278182Y (en) | 2008-06-16 | 2008-06-16 | Electromagnetic bidirectional intermodulation intelligent anti-theft apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200238664U CN201278182Y (en) | 2008-06-16 | 2008-06-16 | Electromagnetic bidirectional intermodulation intelligent anti-theft apparatus |
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| Publication Number | Publication Date |
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| CN201278182Y true CN201278182Y (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200238664U Expired - Fee Related CN201278182Y (en) | 2008-06-16 | 2008-06-16 | Electromagnetic bidirectional intermodulation intelligent anti-theft apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103886700A (en) * | 2012-12-19 | 2014-06-25 | 比亚迪股份有限公司 | Phase detection-based anti-theft system |
| CN106251548A (en) * | 2016-09-28 | 2016-12-21 | 宁波工程学院 | Radiating circuit and sound magnetic burglary-resisting system |
-
2008
- 2008-06-16 CN CNU2008200238664U patent/CN201278182Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103886700A (en) * | 2012-12-19 | 2014-06-25 | 比亚迪股份有限公司 | Phase detection-based anti-theft system |
| CN103886700B (en) * | 2012-12-19 | 2017-02-01 | 比亚迪股份有限公司 | Phase detection-based anti-theft system |
| CN106251548A (en) * | 2016-09-28 | 2016-12-21 | 宁波工程学院 | Radiating circuit and sound magnetic burglary-resisting system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Cang Zhijian Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice |
Addressee: Cang Zhijian Document name: Notification of Termination of Patent Right |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20130616 |