CN205388805U - Intelligence non -blind area electromagnetism anti -theft system - Google Patents

Abstract

The utility model provides the utility model discloses an all kinds of supermarket intelligence non -blind area electromagnetism anti -theft system. Accept the coil by four anticlastic transmitting coil of geometry and two and constitute two independent transmissiones respectively and accept integration coil combination, accomplish transmission of monitoring magnetic field and signal receive. The reciprocal is overlapped in transmission magnetic field because of four transmitting coil geometry produce in the monitoring passageway, the any position of monitoring magnetic stripe in the passageway all can be monitored to reach the theftproof monitoring of non -blind area. Use homemade 32mm theftproof magnetic stripe to accomplish the non -blind area monitoring, 28mm's theftproof magnetic stripe and 2010mm paper security label just can reach satisfied monitor effect. The restriction of liquid composition commodity is not packed and contained and do not receive the commercial metal membrane, the utility model discloses can extensively be applicable to cigarette, wine, cosmetics, medicine especially the theftproof of valuable commodity such as gold and silver ornaments use.

Description

Intelligence non-blind area electromagnetic anti-theft system

Technical field:

This utility model relates generally to the application of non-blind area technology in the commodity anti-theft of all kinds of supermarkets of electromagnetic type burglary protection system for commodities, in particular for wider go out admission mouth, anti-theft tag is had reduced size requirement and metal film or can as outer package with containing the commodity of liquid component.

Background technology:

The electromagnetic anti-theft system generally acknowledged at present is mainly as the antitheft means of libraries, record shop and bookstore.Due to the restriction of operation principle, a transmitting coil, a receiving coil correspondence mutually forming monitoring channel, the geometry of its transmitting coil determines the distribution of the monitoring channel internal magnetic field magnetic line of force.When being intersected with the magnetic line of force launching magnetic field by the longitudinal direction of the antitheft magnetic stripe of monitoring channel, produce be proportional to launch n frequency multiplication of field frequency refracted signal, the intensity of its refracted signal depend on antitheft magnetic stripe with transmitting magnetic field magnetic line intersect angle, the length of magnetic stripe, monitoring channel width and transmitting magnetic field transmitting power etc..Existing monitoring system all adopts an independent transmitting coil, equidirectional is coiled into a winding, or is coiled into big, little two windings, for single geometry.Again because transmitting coil is in the side of monitoring channel, receiving coil is relative opposite side, and the transmitting magnetic field in passage is that side is strong, side is weak, therefore defines the monitoring blind area in monitoring channel.Transmiting signal source is the clock signal of square-wave waveform simultaneously, and the approximate sine wave signal formed after integration, abundant harmonic components is contained in launched magnetic field.In addition the restriction of existing electromagnetic anti-theft System Working Principle and physical condition, emission signal frequency just near the 1KHZ that audiorange is comparatively sensitive, the transmitting in such magnetic field, inevitably bring the noise disturbing people.The signal detection of such monitoring system, employing is pulse triggering mode, general voltage comparator chip make the signal that receives after amplifying and compare with the artificial reference voltage current potential between the two set, and reference voltage is manually set by potentiometer.When reference voltage sets relatively low, monitoring system has higher sensitivity, but interference free performance is relatively low, otherwise sensitivity is lowered, and interference free performance strengthens.It is accomplished by longer antitheft magnetic stripe for reaching monitoring purpose.Only making comparing to individual signals amplitude due to monitoring system and sentence calculation, do not do the requirement on time width and constraint, so, various interference, especially the impulse disturbances in space very easily makes monitoring system produce wrong report.It addition, the metal objects carried with by monitoring channel personnel also can be inspired refracted signal by harmonic components abundant in magnetic field, the detection that system is made the mistake, causes wrong report.Due to previous reasons, this type of burglary-resisting system performance is extremely restricted: because noise disturbs people, transmitting power can not be big；For reducing wrong report, monitoring magnetic stripe have to be grown, and can effectively implement anti-theft monitoring during more than 16cm；For ensureing the sensitivity of its monitoring system, monitoring channel width is less than 70cm.It is that this type of burglary-resisting system can not form multimachine, multichannel working method owing to launching signal equally.The dual pathways currently on the market is to be further added by a receiving coil composition outside the transmitting coil of common monitoring channel.Described in before combining, the application of this type of burglary-resisting system is restricted.At present, on market, electromagnetism burglary-resisting system all belongs to this type of.Can only use in the occasion such as library, bookstore.

What present stage commonly used in supermarket is sound magnetic burglary-resisting system and radio frequency anti-theft system (also referred to as microwave anti-theft system).Anti-theft tag volume used by sound magnetic burglary-resisting system is 45*10*4mm, and volume is relatively big, disguised poor, and the electroacoustic transformational structure that it is made up of three layers stalloy, when finger presses its surface, label Monitoring Performance will lose efficacy.Additionally the price of label is also higher.Commodity or the commodity of small volume that price is relatively low all not easily use.The anti-theft tag of radio frequency anti-theft system is the substrate of papery, adopts L, C resonance coil that printing technology is made.Its area is 40*40mm, is not suitable for using on the commodity of small volume, due also to the restriction of its physical characteristic, it is impossible to use on metal film, the commodity of can packaging and the commodity containing liquid component.When using ambient air humidity bigger, its Monitoring Performance also can be lost, and the advantage of this system is that monitoring channel moulding is simple, lucid and lively.The use cost of system is relatively low.Be usually adopt reusable hard label clothing, shoes cap commodity on make anti-theft monitoring.

For general supermarket, the variation of its commodity, it is desirable to anti-theft tag volume used is little as far as possible, if electromagnetic anti-theft system then requires that antitheft magnetic stripe is short as much as possible, the electromagnetic anti-theft label area of papery is little equally as far as possible, and monitoring channel is wide as far as possible, is absent from monitoring blind area.When forming multimachine, multichannel use, mutual interference or self-excitation will not be produced, do not limited by mounting distance.Commodity for metal film, can packaging will not produce wrong report and fail to report, and can implement normal anti-theft monitoring on the commodity containing liquid component, its monitoring, alarming and disturbing point out can by multiple more humane in the way of complete.

Summary of the invention:

For overcoming the monitoring blind area and relevant issues that existing electromagnetic anti-theft system exists, this utility model adopts the form by four its geometries of transmitting coil are reciprocal to form two composed emission coil units, each composed emission coil unit is added a receiving coil and is formed a transmitting reception integration coil combination, launched by such two again and receive the integration mutually contradictory installation of coil combination, constitute the monitoring channel of a typical electromagnetism burglary-resisting system.The reciprocal transmitting coil of four geometries makes the complementary emission in monitoring magnetic field, launched the magnetic line of force all standing in magnetic field by four transmitting coils in monitoring channel, the antitheft magnetic stripe of monitoring and papery electromagnetic anti-theft label any position and angle in monitoring channel all can intersect with the magnetic line of force launching magnetic field, and reflect the signal of telecommunication that frequency is emission of magnetic field n frequency multiplication of frequency, it is positioned at the receiving coil launched in acceptance integration coil combination monitoring channel both sides and completes the pickup to this signal.

CPLD produces the high-precision sine wave signal of intrasonic and the phase-locked scan clock of two-way for phase-locked amplification.Characteristic according to CPLD self programmable hardware, software programming is adopted to complete the frequency dividing of system clock, after frequency dividing, the high-precision sine wave signal of intrasonic is without the hysteresis in sequential, thus ensure its precision, and thus the sinusoidal wave transmitting as transmitting clock driving monitoring magnetic field eliminates shot noise.For ensureing to launch the normal operation in magnetic field, no-self excitation, it does not interfere with each other, four independent monitoring emission of magnetic field power amplifiers, have employed the OCL power amplifier of differential input, profound and negative feedbck.Four monitoring magnetic field emitting coils are L.C tandem working mode.The transmitting electric capacity connected with transmitting coil, adopts the CBB electric capacity of polypropylene type, the self-recoverage characteristic exclusive because of it and negative temperature coefficient feature, has ensured the stability of four power amplifiers and emission of magnetic field.The magnetic field magnetic line formed due to four transmitting coils is the multiple of the formed magnetic line of force of single transmitting coil, and therefore monitoring channel is widened, and adopts the long anti-theft monitoring magnetic stripe of 32mm just can accomplish that non-blind area is monitored.Receiving coil is 8 word windings, and the geometry of outward appearance is fixed as desired, it is possible to be square, it is also possible to be oval, it is also possible to be other shape.But its geometric center and two are overlapped with the reciprocal geometric center forming composed emission coil unit of geometry by transmitting coil, in the hope of launching signal level balanced action in magnetic field in receiving coil.Reception signal is delivered to corresponding two front buffer amplifying unit and is made Hyblid Buffer Amplifier by two receiving coils respectively.Front buffer amplifying unit is direct current amplifier, and the wherein road of the signal after amplification goes phase-locked amplifying unit to do the pickup phase-locked amplification to signal.Made automatically to adjust by the control from the phase-locked scan clock frequency of CPLD two-way, the gain of phase-locked amplifying unit and interference free performance.Sentenced calculation by microprocessor when making reference level data and processing and draw the function that the phase-locked scan clock to phase-locked amplifying unit controls, the corresponding frequencies according to the numerical control CPLD of its function phase-locked scan clock exported.Adopt dynamic locking scanning phase clock frequency control can take into account sensitivity and anti-interference so that it is more practicality.Signal after phase-locked amplifying unit amplifies with the signal monitoring magnetic stripe and reflect for the while of main containing other interference components.After rectified one-tenth DC level, deliver to microprocessor respective input mouth make A/D conversion be digitized sentence calculation process.Another road signal from front buffer amplifying unit removes reference level amplifying unit, further directly amplifies.This signal packet is containing launching the reference level in magnetic field, metal interference and spatial electromagnetic pulse interference signal level.After the rectified one-tenth DC level of signal level after being amplified by reference level, by the corresponding input port collection of microprocessor, make A/D conversion and digitized sentence calculation process.It is simultaneously from the signal of front buffer amplifying unit also to make signal level Amplitude Ratio in reference level comparator unit and relatively differentiate.This reference level comparator is completed by independent chip, purpose is the interference of significantly metal occur or the output switching activity of comparator during from the electromagnetic interference pulses in space when monitoring magnetic field, the output of comparator is connected with the respective interrupt input port of microprocessor, and it is dealt with in time by microprocessor with interrupt working manner.It is used for the reference voltage participated in as reference level compares to be set by potentiometer.The general threshold value set is higher, to complete only to the interception significantly disturbing signal.

The software adopting adaptive algorithm in microprocessor real time execution establish receive from monitoring magnetic field signal two paths of signals level after phase-locked amplification sentence calculate template and the two paths of signals level after being amplified by reference level sentence calculation template.Average is calculated in sentencing of four tunnel templates, the result data of difference updates the time period at N-1 to N1-n all the time.

In conjunction with photoemission and opto-electronic receiver function, CPLD provide photoemissive clock signal, process when opto-electronic receiver signal is put into effect by microprocessor.When opto-electronic receiver signal is effective, microprocessor will relate forward the 2-3 second and the calculation of sentencing that the continuity signal that gathers of 2-3 second is made on software in real time backward processes this moment.This time period is approximately monitored personnel and the article time by monitoring channel.Its photoelectric monitor is installed on launches the centre position receiving integrated coil combination, complete for ensureing that monitoring process signal gathers, and adopts the mode related forward with Real-time Delay backward to gather signal.If photosignal occurs effective continuously, the time synchronized processed in real time is extended by microprocessor.Filter out the various signals of other times section with this, only the signal that the time period in photoelectric effective occurs is correspondingly processed.First signal after phase-locked amplification is deducted the signal during reference level is amplified by microprocessor, carries interference that metal causes and the impulse disturbances from space with human body to reject.Then the signal signal of phase-locked amplification and reference level amplified again is sentenced calculation template make digitized to sentence calculation with respective.When from the signal in phase-locked amplification sentence calculation draw virtual value time, also to make time window width sentences calculation.During the monitoring abnormal signal namely occurred, reach certain time width just can sentence calculation be effective.When the virtual value of abnormal signal is higher value, desirable less time width, on the contrary then take bigger time width, calculate, with sentencing of time width, the various interference that can screen further from space.

The phase-locked scan clock of two-way of CPLD output has done isolation conversion through photoelectrical coupler, completes and connects on the level of CPLD and phase-locked amplifying unit.Microprocessor and CPLD adopt single+3.3V working power, and phase-locked amplifying unit working power is positive and negative 5V.The phase-locked scan clock of two-way and the phase-locked scan clock input of two-way of two phase-locked amplifying units after conversion are connected.

For ensureing the stable performance accepting the collection of letters number in processing procedure, it is used for two-way receiving the front buffer amplification of signal processing and amplifying, phase-locked amplification, reference level amplification, reference level rating unit by circuit board two pieces identical, adopts identical layout to become two signal processing structure modules with combination of devices.The electrical quantity of each signal processing structure module is set as different value.Connected with mainboard by plug-in unit.So it is easy to select corresponding signal processing structure module to make best coupling according to the parameter that system is actual use.

On the other hand, installing and using in same occasion for meeting many monitorings system, the mounting distance between each system is unrestricted.System clock when being completed as main frame by CPLD exports or inputs as system clock during from machine.First being read slave by CPLD to set, CPLD completes the conversion of corresponding slave duty therein.During as main frame, crystal oscillator clock adopts high voltage after the system clock that the internal frequency dividing of CPLD is, significantly penetrate a grade type of drive completes outside is driven from machine output.As when inputting from machine, from external host input system clock through Shi Mite shaping consider transmitting procedure causes Clock skew after enter CPLD.CPLD, therein with the system clock of its input for master clock, completes its next step frequency dividing.

On the other hand, more directly perceived accurate for what make monitoring field personnel that the work of monitoring system to be grasped, system employing monitors abnormal results and makes monitoring, alarming, makees to disturb the working method pointed out when there is significantly interference.And it is divided into two-way to be separately mounted on the respective structure launched and receive integration coil combination the instruction of monitoring, alarming and interference prompting.So no matter that side of monitoring channel, individually or when monitoring abnormal alarm signal simultaneously and significantly disturb, sentence after calculation through microprocessor, driving two-way abnormal alarm and interference prompting are completed respective relevant action, does so and can make this function more directivity, hommization more.

The beneficial effects of the utility model are: compared with traditional electromagnetic anti-theft system, are launched by two and receive the monitoring channel that integration coil combination is constituted, be launched the magnetic line of force all standing in magnetic field in its passage, are absent from monitoring blind area.Applied range, adopts electromagnetic anti-theft owing to the reason of its physical characteristic is not by commercial metal film, can packaging and the restriction containing liquid component commodity, is applicable to all kinds of supermarkets commodity.Capacity of resisting disturbance is strong, can work under circumstances.Use cost is low, adopts the magnetic stripe anti-theft tag of home made materials making and the anti-theft tag of papery to have extremely low price.Anti-theft tag volume is little, the minimum 28*1*0.2mm that is only of magnetic stripe anti-theft tag, and the anti-theft tag of papery is that 2*1 square centimeter can reach satisfied monitoring effect.

In actual use, reception one monitoring system of integration coil combination work can be launched with one as required to use, also can launch with two and receive integration coil combination and constitute typical burglary-resisting system and use, it is also possible to complete multimachine by slave function, multichannel install and use.So far the utility model has the advantages that apparent.

It should be understood that, without departing substantially from, under scope of the present utility model, this utility model being made change, will also be understood that, explaining according to the restriction being not affected by specific embodiments disclosed herein when reading is disclosed above of this utility model scope, and only according to the appended claims.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, this utility model is further illustrated

Fig. 1 is a block diagram, it is shown that by the example of the intelligent non-blind area electromagnetic anti-theft system that this utility model completes.

Fig. 2, Fig. 3, Fig. 4 respectively illustrate the transmitting coil of oblique angle geometry, and the receiving coil of 8 word windings and the transmitting being made up of two respective independent transmitting coils and receiving coil receive integration coil combination examples.

Fig. 5 illustrates to be launched by two and receives the monitoring channel example that integration coil combination forms.

Detailed description of the invention

For making explanation be easily understood, herein in connection with its various exemplary case, this utility model is described, but insider will appreciate that, it is possible to realize feature and advantage of the present utility model under various configurations, provide in a schematic way thus understanding herein described each embodiment, rather than restrictive.

Fig. 1 is block diagram, it is shown that few examples in the electromagnetic anti-theft system of this utility model intelligence non-blind area.

The output input corresponding to CPLD (2) being set (27) by slave is connected, and the input output corresponding to COLD (2) of host clock output (28) is connected.The output input corresponding to CPLD (2) inputting (29) from machine clock is connected.Slave sets (27) state control CPLD (2) and acts accordingly.When principal and subordinate sets (27) for Host Status, system frequency dividing made by the clock that crystal oscillator clock (32) is sent here by CPLD (2), and the output of corresponding system clock is done on system clock one tunnel driving host clock output (28) divided out.Completion system clock signal is significantly converted and penetrates level and drives by host clock output (28).Another road uses at the internal system clock of making of CPLD (2).When slave sets (27) for slave status, inputting (29) from machine clock adopts Schmidt circuit to complete the system clock shaping that external host is sent here, enter CPLD (2) respective input mouth after shaping, use as CPLD (2) internal system time clock.The output of crystal oscillator clock (32) input corresponding to CPLD (2) is connected, and now crystal oscillator clock (32) clock disconnects in the inside of CPLD (2), stops its clock work.After CPLD (2) internal system time clock is divided, produces as the intrasonic used by monitoring system magnetic field transmitting, high-precision sine wave, and synchronize the two-way producing its n times frequency multiplication phase-locked scan clock for phase-locked amplification.The output of CPLD (2) is connected with the input of Hyblid Buffer Amplifier (3).The two-stage that Hyblid Buffer Amplifier (3) is compound is amplified.It completes the further filtering isolation of intrasonic, high-precision sine wave is amplified, the driving of Ji Dui tetra-road power amplifier, including: the output of Hyblid Buffer Amplifier (3) is connected with A road power amplifier (4) input, the output on A road power amplifier (4) is connected with one end of A transmitting coil (5), the other end of A transmitting coil (5) is launched electric capacity (6) with A and is connected, the emission of magnetic field unit of composition A channel.The output of Hyblid Buffer Amplifier (3) is connected with the input on B road power amplifier (7), the output on B road power amplifier (7) is connected with one end of B transmitting coil (8), the other end of B transmitting coil (8) is launched electric capacity (9) with B and is connected, the emission of magnetic field unit of the channel B of composition.The output of Hyblid Buffer Amplifier (3) is connected with C road power amplifier (11) input, the output on C road power amplifier (11) is connected with one end of C transmitting coil (12), the other end of C transmitting coil (12) is launched electric capacity (13) with C and is connected, the emission of magnetic field unit of composition C-channel.The output of Hyblid Buffer Amplifier (3) is connected with the input on D road power amplifier (14), the output on D road power amplifier (14) is connected with one end of D transmitting coil (15), the other end of D transmitting coil (15) is launched electric capacity (16) with D and is connected, the emission of magnetic field unit of composition D passage.

For ensureing that four road transmitter unit electric parameters one are made peace the stablizing of work, it is made up of a board structure of circuit module (37) A road power amplifier (4) and B road power amplifier (7), constituted a board structure of circuit module (38) by C road power amplifier (11), D road power amplifier (14).Components and parts used by OCL power amplifier that A road power amplifier (4), B road power amplifier (7), C road power amplifier (11), D road power amplifier (14) use and board structure of circuit module all adopt parameter and the layout of symmetrical expression.

A transmitting coil (5), B transmitting coil (8) are constituted with A receiving coil (10) launches the integrated coil combination of reception.Wherein A transmitting coil (5) and B transmitting coil (8) show the structure shown in row with the reciprocal structure of geometric figure and A receiving coil (10) composition such as Fig. 4.C transmitting coil (12), D transmitting coil (15) are constituted with B receiving coil (17) launches the integrated coil combination of reception.Wherein C transmitting coil (12) and D transmitting coil (15) show the structure shown in row with the reciprocal structure of geometric figure and B receiving coil (17) composition such as Fig. 4.Transmitting and the receiving coil of each integration coil combination are constituted in tightly coupled binding mode.For make each launch receive integration coil combination two transmitting coils transmittings magnetic field level balance act on receiving coil.A receiving coil (10), B receiving coil (17) are that 8 word windings are coiled into, as shown in Figure 3.Complete also dependent on needing the geometric shape adopting other.For ensureing the signal of magnetic stripe refraction in monitoring magnetic field is effectively received, adjust the relative displacement launching two transmitting coils and the receiving coil received in integration coil combination respectively, make from monitoring magnetic field level under not monitoring label refracted signal premise, amplify after (18), B front buffer amplification (19) through A front buffer, present minimum levels value at its outfan.

A receiving coil (10), B receiving coil (17) amplify (18) with A front buffer respectively, B front buffer amplifies (19) input and is connected.A front buffer amplifies (18), B front buffer amplification (19) is direct current amplifier, completes at this Hyblid Buffer Amplifier launching the various signals of magnetic field pickup.The signal that A front buffer amplifies (18), B front buffer amplification (19) exports each divides two-way, one road signal does further phase-locked amplification, be connected with the input of the phase-locked amplification of A (20), the phase-locked amplification of B (21) respectively, the phase-locked amplification of A (20), the phase-locked amplification of B (21) output corresponding with microprocessor (1) input be connected.Purpose is to be extracted by the magnetic stripe refracted signal picked up in all signals in monitoring magnetic field.The output of CPLD (2) two-way phase-locked scan clock is connected with the input of the two-way of level conversion (22), the two-way output input of scan clock phase-locked with the two-way of the A phase-locked amplification of phase-locked amplification (20) B (21) respectively of level conversion (22) is connected.The corresponding output input corresponding to CPLD (2) of microprocessor (1) is connected, to complete the FREQUENCY CONTROL to phase-locked scan clock.The control function of phase-locked scan clock frequency draws after the numerical analysis of A reference level (23), B reference level (24) being sentenced calculation by microprocessor (1) basis.

Another road A reference level amplifies (23), the input of B reference level amplification (24) amplifies (18) with A front buffer respectively, the output of B front buffer amplification (19) is connected.The signal that A reference level amplifies (23), A front buffer is amplified (18) by B reference level amplification (24), B front buffer amplification (19) is sent here delivers to the respective input of microprocessor (1) after amplifying further and being rectified into DC level.Collection when it is put into effect by microprocessor (1), complete the process to various interference signals.A reference level compares (25), B reference level compares that the input of (26) amplifies (18) with A front buffer respectively, B front buffer amplifies the output of (19) and is connected, and it is connected that A reference level compares (25), B reference level compares the output interrupting input corresponding with microprocessor (1) respectively of (26).Complete the real-time blocking significantly disturbing signal.

A front buffer amplifies (18), the phase-locked amplification of A (20), A reference level amplifies (23), A reference level compares (25) and constitutes a signal processing structure module (45).B front buffer amplifies (19), the phase-locked amplification of B (21), B reference level amplifies (24), B reference level compares (26) and constitutes a signal processing structure module (46).Signal processing structure module (45), (46) can exchange use.

Photoemission clock is produced by system clock frequency dividing internal for CPLD (2).CPLD (2) output accordingly is connected with the input of photoemission (30).Photoemission (30) is an independent photoemission module.Opto-electronic receiver (31) is installed and used with photoemission is mutually contradictory, opto-electronic receiver (31) output switching activity when photoemission is blocked, when blocking its reinstatement state of end.Opto-electronic receiver (31) is an independent opto-electronic receiver module, and it exports interrupting input corresponding with microprocessor (1) and is connected.The microprocessor (1) time according to opto-electronic receiver (31) output switching activity and reinstatement state, the calculation of sentencing with delay time section backward of relating forward completing this moment monitor signal processes.

Microprocessor (1) monitoring, alarming, interference prompt facility are pointed out (34), B road monitoring, alarming (35) with A road monitoring, alarming (33), the interference of A road respectively by its output accordingly, the input on B road interference prompting (36) is connected.A road monitoring, alarming (33), A road interference prompting (34), B road monitoring, alarming (35), B road interference prompting (36) are modular construction, include Hyblid Buffer Amplifier and power drive in structure.

Microprocessor (1) is not only restricted to specific processor type, it is possible to originate from the product of each company.CPLD (2) is extensive hardware programmable logical device, it is also possible to complete with FPGA and traditional digit chip, equally not by the restriction of manufacturer and model.

Fig. 2 is geometry is bevel transmitting coil, and label (39) its angle is between 35 degree to 55 degree, and label (39A) is corresponding to another side.Its coil adopts equidirectional coiling.

Fig. 3 is 8 its geometries of word winding is the receiving coil of Nogata shape, label (41), (41A), (42), (42A) are coil windings, and label (43), (44) are the switch-back point of 8 word windings.

Fig. 4 is two transmitting coils and a receiving coil composition transmitting acceptance integration coil combination, and heavy line is two respective independent transmitting coils, and fine line is receiving coil.

Shown in Fig. 4, two transmitting coils using its label (40), (40A) after compound up and down vertically for the position of a line as the periphery of assembly, parallel with receiving coil constitute to launch receive integration coil combination.Geometric center after two transmitting coil compounds overlaps on an axle center with the geometric center of receiving coil.Wherein the geometric widths of the center at receiving coil label (41), (41A) place is between the 1/4 to 3/4 of the center width at label (40) after two transmitting coil compounds, (40A) place.

Fig. 5 is constituted monitoring channel schematic diagram during canonical system by two transmitting reception integration coil combination.

Claims (12)

1. intelligence non-blind area electromagnetic anti-theft system is characterized in that: includes, the monitoring channel that the emission of magnetic field being made up of two transmitting reception integration coil combination and signal receive；Emission of magnetic field that microprocessor and CPLD have controlled, amplification to received signal and digitized processing are inquired about in conjunction with photoelectricity；It is also equipped with slave working method, monitoring, alarming, interference prompt facility simultaneously.

2. intelligence non-blind area according to claim 1 electromagnetic anti-theft system, is characterized in that:

Be connected with the input on A road power amplifier (4) by Hyblid Buffer Amplifier (3) output, the output on A road power amplifier (4) is connected with one end of A transmitting coil (5), the other end of A transmitting coil (5) is connected with the one end launching electric capacity (6)；

Be connected with the input on B road power amplifier (7) by Hyblid Buffer Amplifier (3) output, the output on B road power amplifier (7) is connected with one end of B transmitting coil (8), one end of the other end B of B transmitting coil (8) transmitting electric capacity (9) is connected；

Be connected with the input on C road power amplifier (11) by Hyblid Buffer Amplifier (3) output, the output on C road power amplifier (11) is connected with one end of C transmitting coil (12), one end of the other end C of C transmitting coil (12) transmitting electric capacity (13) is connected；

Be connected with the input on D road power amplifier (14) by Hyblid Buffer Amplifier (3) output, the output of (14) of D power amplifier is connected with one end of D transmitting coil (15), the other end of D transmitting coil (15) is connected with D transmitting electric capacity (16) one end.

3. intelligence non-blind area according to claim 1 electromagnetic anti-theft system, is characterized in that:

Constituted transmitting received integration coil combination by A transmitting coil (5), B transmitting coil (8), A receiving coil (10)；

Constituted transmitting received integration coil combination by C transmitting coil (12), D transmitting coil (15), B receiving coil (17)；

The geometric center of the geometric center after two reciprocal compounds of transmitting coil in integrated combination and receiving coil coexists on an axle center, and the geometric widths of receiving coil is after two transmitting coil compounds between the 1/4 to 3/4 of width.

4. intelligence non-blind area according to claim 2 electromagnetic anti-theft system, is characterized in that:

A road power amplifier (4), B road power amplifier (7) form the module of a board structure of circuit；

C road power amplifier (11), D road power amplifier (14) form the module of a board structure of circuit；

A road power amplifier (4), B road power amplifier (7), C road power amplifier (11), D road power amplifier (14) are OCL power amplifier.

5. intelligence non-blind area according to claim 1 electromagnetic anti-theft system, is characterized in that:

Microprocessor (1) output controls input corresponding to CPLD (2) and is connected, the output of CPLD (2) is connected with Hyblid Buffer Amplifier (3) input, and crystal oscillator clock (32) output input corresponding to CPLD (2) is connected.

6. intelligence non-blind area according to claim 5 electromagnetic anti-theft system, is characterized in that:

Being connected by the output of the phase-locked scan clock of CPLD (2) two-way scan clock input phase-locked with the two-way of level conversion (22), the two-way lock scanning phase clock output of level conversion (22) is connected with the phase-locked scan clock input of the input of A phase-locked amplification (20) two-way phase-locked scan clock and B phase-locked amplification (21) two-way respectively.

7. intelligence non-blind area according to claim 1 electromagnetic anti-theft system, is characterized in that:

A receiving coil (10) amplifies (18) input and is connected with A front buffer, A front buffer amplifies (18) output and is connected with the phase-locked amplification of A (20) input, and the phase-locked amplification of A (20) output input corresponding to microprocessor (1) is connected；

B receiving coil (17) amplifies (19) input and is connected with B front buffer, B front buffer amplifies (19) output and is connected with the phase-locked amplification of B (21) input, and the phase-locked amplification of B (21) output input corresponding to microprocessor (1) is connected.

8. intelligence non-blind area according to claim 7 electromagnetic anti-theft system, is characterized in that:

A reference level is amplified (23) input and is connected with A front buffer amplification (18) output, A reference level is amplified (23) output input corresponding to microprocessor (1) and is connected, the output of input and A front buffer amplification (18) that A reference level compares (25) is connected, and A reference level compares the output input corresponding to microprocessor (1) of (25) and is connected；

B reference level is amplified (24) input and is connected with B front buffer amplification (19) output, B reference level is amplified (24) output input corresponding to microprocessor (1) and is connected, the output of input and B front buffer amplification (19) that B reference level compares (26) is connected, and B reference level compares the output input corresponding to microprocessor (1) of (26) and is connected.

9. intelligence non-blind area according to claim 7 electromagnetic anti-theft system, is characterized in that:

A front buffer amplifies (18), the phase-locked amplification of A (20), A reference level amplifies (23), A reference level compares (25) and forms the construction module of a circuit board；

B front buffer amplifies (19), the phase-locked amplification of B (21), B reference level amplifies (24), B reference level compares (26) and forms the construction module of a circuit board.

10. intelligence non-blind area according to claim 1 electromagnetic anti-theft system, is characterized in that:

The input of photoemission (30) output corresponding to CPLD (2) is connected；

Photoelectricity accepts the output input corresponding to microprocessor (1) of (31) and is connected.

11. intelligence non-blind area according to claim 1 electromagnetic anti-theft system, it is characterized in that:

Slave sets the output input corresponding to CPLD (2) of (27) and is connected；

The output input corresponding to CPLD (2) inputting (29) from machine clock is connected；

The input output corresponding to CPLD (2) of host clock output (28) is connected.

12. intelligence non-blind area according to claim 1 electromagnetic anti-theft system, it is characterized in that:

The input on A road monitoring, alarming (33) output corresponding to microprocessor (1) is connected；

The input output corresponding to microprocessor (1) on A road interference prompting (34) is connected；

The input on B road monitoring, alarming (35) output corresponding to microprocessor (1) is connected；

The input output corresponding to microprocessor (1) on B road interference prompting (36) is connected.