CN102426746B - Anti-interference wireless radio frequency anti-theft system and anti-interference application method - Google Patents
Anti-interference wireless radio frequency anti-theft system and anti-interference application method Download PDFInfo
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- CN102426746B CN102426746B CN201110401621.7A CN201110401621A CN102426746B CN 102426746 B CN102426746 B CN 102426746B CN 201110401621 A CN201110401621 A CN 201110401621A CN 102426746 B CN102426746 B CN 102426746B
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Abstract
The invention relates to a wireless radio frequency anti-theft monitoring system, in particular to an anti-interference method for a wireless radio frequency system serving as a monitoring anti-theft device. The invention aims to solve the problems of false alarm of the conventional anti-theft system and interference by other signals or self-interference. In order to solve the technical problems, the invention adopts the technical scheme that: an anti-interference wireless radio frequency anti-theft system is arranged in a vertical rod in front of a supermarket door and consists of wireless radio frequency equipment, an antenna and an alarm, wherein the wireless radio frequency equipment is used for sending and receiving a wireless radio frequency signal; wireless radio frequency receiving equipment is used for receiving information which is reflected; a programmable digital information processor is connected to an output end of the wireless radio frequency equipment and used for processing radio frequency information which is fed back by the wireless radio frequency equipment; and the programmable digital information processor transmits the processed information to the alarm.
Description
Technical field
This patent relates to the anti-monitoring system of a kind of less radio-frequency, specially refers to and can prevent what other signals from disturbing, can accurately judge the anti-interference wireless radio frequency burglary-resisting system in its signal source.
This patent relates to a kind of using method of radio frequency system, specially refers to a kind of anti-interference method while utilizing radio frequency system to do monitoring anti-theft device.
Background technology
Commodity retail industry enters the free management style of open-shelf, in China since early eighties in last century, the advantage of this management style is: provide the abundant degree of freedom of freely selecting commodity to consumer, the inexorable trend that the emotion distance having furthered between retailer and consumer is human-based management, build a harmonious society.But the free management style of open-shelf, also has higher requirement to dealer's inner management, especially the management to open-shelf goods.It not only requires us will have tight organiztion measure, and strict organizational discipline also will have the detection, monitoring, loss prevention of science, antitheft technical measures and means.For now, domestic goods retail trade, every year because detecting, monitor commodity value loss number not tight and that the undetected flase drop of equipment causes and large.Its reason has poor management, and organiztion measure is not implemented, and not strict and impartial, antitheft, the detection of enforcing discipline, watch-dog are outmoded, and failure rate is high, backward in technique suitable relation.With regard to loss prevention checkout equipment, at present domestic generally use, or sound magnetic or radio frequency detection loss prevention technology, and the transmission of signal and control still adopt analog signaling transmission and control.The basic reason that Here it is causes checkout equipment to fail to report, report by mistake, because the transmission of simulating signal and control, and is vulnerable to the interference such as disturbing effect, especially high light, the Strong magnetic of external environment condition, condition, strong noise.In order to solve the deficiency of prior art, the utility model discloses a kind of software radio EAS loss prevention and detects controller, it adopts digital transmission and control technology, the EAS loss prevention using with prior art detects compared with controller, have under same environmental baseline, resist in the ability of disturbing by force, job stability is high, the advantages such as the generation that existence is failed to report and reported by mistake are hardly developing direction and the trend that detects now loss prevention technology.
Summary of the invention
The invention provides a kind of anti-interference wireless radio frequency burglary-resisting system, its goal of the invention is to solve that burglary-resisting system went out in the past wrong report is misrepresented deliberately and disturbed by other information number or the problem of self phase mutual interference.
For solving the problems of the technologies described above, the present invention is achieved in that a kind of anti-interference wireless radio frequency burglary-resisting system, be installed in the vertical rod in front of the door of supermarket, it comprises that less radio-frequency equipment, antenna and alarm form, and described less radio-frequency equipment is for sending and receiving radio frequency signal; Described less radio-frequency receiving equipment is for connecing the information reflecting; It is characterized in that: the radio-frequency information in the programmable digital information processor of output termination one of less radio-frequency equipment for the treatment of the reaction without radio-frequency apparatus; Described programmable digital information processor sends information after treatment to alarm; Described less radio-frequency equipment comprises wireless transmitter module TX and wireless receiving module RX; Described wireless transmitter module TX is corresponding with wireless receiving module RX; Described wireless receiving module RX comprises again front end receiving circuit, amplitude limit regulating circuit, processing circuitry of intermediate frequency and fundamental frequency radiating circuit; Described wireless transmitter module TX comprises again power amplification circuit, power selection circuitry, centre frequency initialization circuit, sweep limit initialization circuit; Described wireless transmitter module TX and wireless receiving module RX are that timesharing is carried out by programmable digital information processor timesharing sending and receiving; Mutually stagger, described timesharing unit is Microsecond grade.The present invention is in the signal place, answer programmable digital information processor, utilize the powerful of it and function fast, row timesharing control when transmitting and receiving, that is to say within the quite short time and launch, within the next time, receive, the transmitting-receiving speed that this people just have no way of reacting is at all carried out time-division processing again, thereby has solved the problem that interference occurs self of this anti-theft device in the past.Meanwhile, sending and receiving be still simulating signal, because analog information is in the past difficult to process and the problem of judgement; This patent utilizes programmable digital information processor, first signal is made to conversion; Convert numerical information to; Judged by the program of prior input by programmable numerical information place amount again; Thereby further filter, reach the function that prevents wrong report.
Technique scheme is improved further, and described less radio-frequency equipment comprises wireless transmitter module TX and wireless receiving module RX; Described wireless transmitter module TX is corresponding with wireless receiving module TX; Described wireless transmitter module RX comprises again front end receiving circuit, amplitude limit regulating circuit, processing circuitry of intermediate frequency and fundamental frequency radiating circuit; Described less radio-frequency receiver module TX comprises again power amplification circuit, power selection circuitry, centre frequency initialization circuit, sweep limit initialization circuit.This programme is to carry out front-end processing by wireless receiving module RX, and so-called front-end processing refers to sets up a mathematical model, filters for undesirable; Amplitude limit regulates and refers to that detecting each is detected right voltage, limits again for voltage; Thereby further screening.Intermediate frequency process is processed the processing such as it subtracts frequently, raises the price.Wireless transmitter module TX carries out power to it to be put, and carries out certain Frequency Band Selection, thereby ensures positive accuracy rate.
Technique scheme is further set forth, and the described digital information processor frequency division segmentation of compiling is processed the numerical information of backspace; Wherein, mainly for the treatment of the position of tag decoder not, the fixed labels in radio-frequency region is done to process continuously at certain hour simultaneously.The maximum feature of this patent is that analog information is originally changed into numerical information; Again by the various situation judgements to numerical information; Whether thereby sending instruction to alarm opens.The method has fully solved and had only depended on analog information in the past, for the judgement of simulating signal; The information loading of simulating signal is limited in fact, is only whether this inside is had to induction, just has and reports to the police, and report to the police always, cannot judge the information that it is more deep; For example whether this this label is moving in scope, or whether this signal be not that Commercial goods labels sends, but other signals disturb etc. problem all cannot judge.And this programme is just to have solved this technical barrier.
Technique scheme is further set forth, and described vertical rod can be more than one, many vertical rods, there are at least one pair of wireless transmitter module TX and wireless receiving module RX; Described wireless transmitter module TX and wireless receiving module RX can interlacedly transmit and receive.For this patent, do not need correspondingly one by one for wireless transmitter module TX and wireless receiving module RX, only require in system, there is wireless transmitter module TX and wireless receiving module RX is just passable; Carry time-sharing operation because this patent adopts, therefore, as long as required, go by row transmitter module TX and receiver module RX, and position neither fix, unlike in the past, transmitting with receive can not put near, can not be too far away; And there is very strong requirement for putting environment; This patent does not have requirement.The design that can not disturb like this, the demand that meets client that can be larger, reduces dead angle as much as possible.
The Second Problem that this patent will solve is: the said system method that anti-stop signal disturbs in monitoring is provided; Use its method can prevent its alarm instantaneous interference to external world, fixed signal etc. are misrepresented deliberately the possibility of wrong report.
For solving the problems of the technologies described above, this patent does like this, under said system environment, enters in radio-frequency region when not opening tag decoder, and described less radio-frequency receiving equipment sends to less radio-frequency output terminal after receiving information; First convert thereof into digital signal by programmable digital information processor, the information of then digital signal being reacted is carried out digital processing, wherein enters multi collect for any information; As this label information only collects once or several times limited in official hour section, be judged to be undesired signal, do not notify alarm; If the position of this label does not change in official hour section, do not notify alarm.This patent is the powerful calculation function that utilizes programmable digital information processor; In finite time to same signal continuous acquisition; Judge whether it is interference signal according to the continuation of signal, can cross the continuous position that judges signal source and judge whether label is moving, and set up certain reference value, further realize the accuracy that judges net result.
Technique scheme is done to further refinement, and described programmable digital information processor is by each label signal of staging treating.Its arithmetic speed of programmable digital information processor is quite fast, and therefore, there is multiple signal source in scope time, it adopts staging treating information; Can not produce the situation of phase mutual interference.
Technique scheme is done to further refinement, and described label information comprises Item Title, distance apart from vertical rod.Because of the reaction of programmable digital information processor be digital signal, therefore, in the information that can read according to programmable digital information processor in Control Room, judge the entrained Item Title of this label, and he is from information such as how far anti-theft device also have.
Technique scheme is done to further refinement, whether described programmable digital information processor is identical by repeatedly judging the position of same label; Judge whether label moves.Described programmable digital information processor, judges that by repeatedly judging whether the signal of same label exists this signal is interfere information, is also non-interfere information.Utilize programmable digital information processor, by repeatedly same target being carried out to position judgment, thereby judge whether it is moving, because for not mobile article, prove not steal possibility, therefore, in order to prevent the possibility of wrong report, reduce error rate as far as possible, adopt above-mentioned way.In real use, it is unavoidable also having signal to disturb, and for electronic tag, what we set is 85 hertz, and for accidental signal, is also probably same frequency; If be only flashy signal, we still allow alarm equipment alarm, have so wrong report many times; Therefore this method adopts and carries out multi collect for same signal source, determines that it exists within a certain period of time always, judges its position simultaneously, further determines its existence; Thereby go whether identification is label.
Technique scheme is done to further refinement, wireless transmitter module TX and wireless receiving module RX; Described wireless transmitter module TX is corresponding with wireless receiving module RX; Wireless transmitter module TX in vertical rod and wireless receiving module RX communication mutually, also communication mutually of each root vertical rod and other vertical rods; And programmable digital information processor that can be excessively described regulates mutually order each other.Can interlaced communication between them; Self lead to news forever, thereby greatly reduced the appearance at dead angle.
Brief description of the drawings
Fig. 1 is internal module schematic diagram of the present invention.
Embodiment
In order further to describe the feature of this product, the advantage of lower this product of mask example explanation.
Specific embodiment 1
A kind of anti-interference wireless radio frequency burglary-resisting system, be installed in the vertical rod in front of the door of supermarket, it comprises that less radio-frequency equipment, antenna and alarm form, and described less radio-frequency equipment is for sending and receiving radio frequency signal. described less radio-frequency receiving equipment is for connecing the information reflecting; Radio-frequency information in the programmable digital information processor 3 of output termination one of less radio-frequency equipment for the treatment of the reaction without radio-frequency apparatus; Described programmable digital information processor 3 sends information after treatment to alarm.Described less radio-frequency equipment comprises wireless transmitter module TX1 and wireless receiving module RX2; Described wireless transmitter module TX1 is corresponding with wireless receiving module RX2; Described wireless receiving module RX2 comprises again front end receiving circuit, amplitude limit regulating circuit, processing circuitry of intermediate frequency and fundamental frequency radiating circuit; Described less radio-frequency transmitter module TX1 comprises again power amplification circuit, power selection circuitry, centre frequency initialization circuit, sweep limit initialization circuit; Described wireless transmitter module TX1 and wireless receiving module RX2 are that timesharing is carried out by programmable digital information processor 3 timesharing sending and receivings; Mutually stagger, control and accomplish described wireless transmitter module TX1 work, when transmitting, wireless receiving module RX2 does not work, and that is to say, it does not receive; Then stop transmitting, carry out work by receiver module RX2; The signal that in reception, wireless transmitter module TX1 sends in a flash; Due to the operation control of programmable digital processor high speed degree with to transmitter module, the high-quality requirement of receiver module; The send and receive that allows them circulate, thus the problem of having exempted from phase mutual interference covered; Therefore, this patent product can be contained in transmitter module TX1 and receiver module RX2 in same vertical rod; And can not produce each other interference; Like this for small-sized supermarket, or the client who needs especially, they there is no need to select two bar vertical rods, or select also will lay separately a trigger mechanism or receiving mechanism after a vertical rod.
After having label to enter within the scope of it, emitter under the control of programmable digital message handler 3, the transmission simulating signal of interruption; Certainly receiving trap is also in the reception simulating signal of being interrupted simultaneously, and staggering in send and receive interval, and then can not cause interference; Because speed is quite fast, so that this is people's translational speed institute is inaccessiable; Compute is carried out with microsecond in its interval, that is to say, a upper microsecond transmitting, and next microsecond stops transmitting, but receives, and next microsecond stops again receiving; Send elsewhere and penetrate, in a word at synchronization, transmitting is asynchronous with reception.By the received signal of receiver module, after analog to digital conversion, filtered according to the program of finishing in advance by programmable digital message handler 3, thereby allow alarm whether report to the police.
Specific embodiment 2
It is mainly in having made in such scheme and changing that example is executed in this practicality, and upper one I mention in for example, and described wireless transmitter module TX1 is corresponding with wireless receiving module RX2, and the correspondence of indication in embodiment does not refer to correspondence one by one; Because sometimes, more than one of vertical rod; In each root bar, can there is wireless transmitter module TX1 and wireless receiving module RX2 simultaneously, can certainly only have wireless transmitter module TX1 or wireless receiving module RX2; And do not affect the work between them like this, because their transmitting and receiving is rapid, if only there is a transmitter module RX2, that correspondence is multiple wireless receiving module RX2; At this moment transmitting still can be corresponding with reception; So just, transmitting and reception can be put arbitrarily, need not consider its position problems; In product in the past, installation personnel can be placed on most of the time in Installation and Debugging, and in Installation and Debugging, accent is how to prevent transmitting and the interference receiving; Meanwhile, adopt two bars or two above vertical rods, can expand the scope of covering as far as possible.
Claims (9)
1. an anti-interference wireless radio frequency burglary-resisting system, is installed in the vertical rod in front of the door of supermarket, and it comprises less radio-frequency equipment, antenna and alarm, and described less radio-frequency equipment is for sending and receiving radio frequency signal; It is characterized in that: the radio-frequency information in the programmable digital information processor of output termination one of less radio-frequency equipment for the treatment of the reaction of less radio-frequency equipment; Described programmable digital information processor sends information after treatment to alarm; Described less radio-frequency equipment comprises wireless transmitter module TX and wireless receiving module RX; Described wireless transmitter module TX is corresponding with wireless receiving module RX; Described wireless receiving module RX comprises again front end receiving circuit, amplitude limit regulating circuit, processing circuitry of intermediate frequency and fundamental frequency radiating circuit; Described wireless transmitter module TX comprises again power amplification circuit, power selection circuitry, centre frequency initialization circuit, sweep limit initialization circuit; Described wireless transmitter module TX and wireless receiving module RX, by programmable digital information processor timesharing sending and receiving, stagger mutually, and the unit of described timesharing is Microsecond grade; Described programmable digital message handler timesharing is processed the different numerical information of returning respectively; Wherein, mainly for the treatment of the every position of tag decoder not, each fixed labels in radio-frequency region is done to process continuously at certain hour simultaneously.
2. anti-interference wireless radio frequency burglary-resisting system according to claim 1, is characterized in that: described vertical rod is many vertical rods, has at least one pair of wireless transmitter module TX and wireless receiving module RX; Described wireless transmitter module TX and wireless receiving module RX is interlaced transmits and receives.
3. process the method for undesired signal by anti-interference wireless radio frequency burglary-resisting system claimed in claim 1 for one kind, it is characterized in that: less radio-frequency equipment is to be made up of wireless transmitter module TX and wireless receiving module RX, described wireless transmitter module TX and wireless receiving module RX are loaded in same vertical rod; By programmable digital information processor timesharing control, at synchronization, when described wireless transmitter module TX work, wireless receiving module RX quits work; When wireless receiving module RX work, wireless transmitter module TX quits work; When tag decoder not enters in radio-frequency region, described less radio-frequency equipment is received the output terminal that sends to less radio-frequency equipment after information; First convert thereof into digital signal by programmable digital information processor, the information of then digital signal being reacted is carried out digital processing, and the information wherein producing for any same signal source is carried out multi collect; As the information of this label only collects once or several times limited in official hour section, be judged to be undesired signal, do not notify alarm; If the position of this label does not change in official hour section, do not notify alarm.
4. anti-interference wireless radio frequency burglary-resisting system according to claim 3 is processed the method for undesired signal, it is characterized in that: described programmable digital information processor is by each different label signal of time-division processing.
5. anti-interference wireless radio frequency burglary-resisting system according to claim 4 is processed the method for undesired signal, it is characterized in that: described label information comprises the distance of label, and whether label is moving, the voltage amplitude of label.
6. anti-interference wireless radio frequency burglary-resisting system according to claim 3 is processed the method for undesired signal, it is characterized in that, and described programmable digital information processor, whether identical by repeatedly judging the position of same label, judge whether label moves.
7. anti-interference wireless radio frequency burglary-resisting system according to claim 4 is processed the method for undesired signal, it is characterized in that: described programmable digital information processor, judging that by repeatedly judging whether the signal of same label exists this signal is interfere information, is also non-interfere information.
8. anti-interference wireless radio frequency burglary-resisting system according to claim 4 is processed the method for undesired signal, it is characterized in that: described vertical rod is when more than two, and the programmable digital information processor in its every vertical rod all works alone; Or establish one for groundwork, other as back work, process information.
9. anti-interference wireless radio frequency burglary-resisting system according to claim 8 is processed the method for undesired signal, it is characterized in that: described wireless transmitter module TX is corresponding with wireless receiving module RX; Wireless transmitter module TX in vertical rod and the mutual communication of wireless receiving module RX, each root vertical rod and other vertical rods be communication mutually also; And can regulate order each other by described programmable digital information processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110401621.7A CN102426746B (en) | 2011-12-07 | 2011-12-07 | Anti-interference wireless radio frequency anti-theft system and anti-interference application method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110401621.7A CN102426746B (en) | 2011-12-07 | 2011-12-07 | Anti-interference wireless radio frequency anti-theft system and anti-interference application method |
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| CN102426746A CN102426746A (en) | 2012-04-25 |
| CN102426746B true CN102426746B (en) | 2014-08-20 |
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| CN201110401621.7A Expired - Fee Related CN102426746B (en) | 2011-12-07 | 2011-12-07 | Anti-interference wireless radio frequency anti-theft system and anti-interference application method |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2239050Y (en) * | 1995-12-13 | 1996-10-30 | 披克(南京)电子技术有限公司 | Reader with responder with passive, without contact and operation |
| US6025781A (en) * | 1997-02-03 | 2000-02-15 | Avery Dennison Corporation | Device for use in detecting the unauthorized removal of an article of commerce from a store or other business establishment and method of making the same |
| JP2001307242A (en) * | 2000-04-17 | 2001-11-02 | Just Corporation:Kk | Burglar preventive gate with illumination function |
| KR101222561B1 (en) * | 2004-11-18 | 2013-01-16 | 센소매틱 일렉트로닉스, 엘엘씨 | Eas reader detecting eas function from rfid device |
| US7782207B2 (en) * | 2007-06-12 | 2010-08-24 | Checkpoint Systems, Inc. | Comprehensive theft security system |
| CN201845403U (en) * | 2010-08-24 | 2011-05-25 | 上海弗英软件有限公司 | Ultrahigh frequency RFID (radio frequency identification device) intelligent commodity anti-theft channel |
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2011
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