CN202003472U - Commodity detector with early warning function - Google Patents

Commodity detector with early warning function Download PDF

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Publication number
CN202003472U
CN202003472U CN2011201175058U CN201120117505U CN202003472U CN 202003472 U CN202003472 U CN 202003472U CN 2011201175058 U CN2011201175058 U CN 2011201175058U CN 201120117505 U CN201120117505 U CN 201120117505U CN 202003472 U CN202003472 U CN 202003472U
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alarm
circuit
integrated circuit
sound
light
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Expired - Fee Related
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CN2011201175058U
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Chinese (zh)
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何勇
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Abstract

A commodity detector with an early warning function comprises a transmitter and a receiver. The receiver is provided with an antenna, a waveform processing and amplifying unit and an alarm unit consisting of an alarm processor, an alarm lamp and a buzzer. The alarm processor adopts a core digital or thick-film digital integrated circuit, and the alarm lamp and the alarm buzzer are respectively connected with two output pins of an output driving circuit in the core digital or thick-film digital integrated circuit. In the core digital or thick-film digital integrated circuit, an early warning condition includes that T light is smaller than T sound, wherein the T light and the T sound are respectively response signal cycles corresponding to starting time of early warning of the alarm lamp and starting time of alarm of the buzzer, and the response signals are signals sent from commodity anti-theft tags which are modulated according to transmitting signals of the transmitter. On the premise of not increasing equipment cost or affecting original use habits, sound and light synchronous alarm is changed into sound and light differentiated alarm. Users learn electromagnetic environments which cannot be seen with naked eyes by the aid of an early warning device which can warn possibility of false alarm in advance. The chosen integrated circuit can drive a high-power triode so that various requirements of sound and light alarm can be met.

Description

The commercial detector of band warning function
(1) technical field: the commercial detector of band warning function is an a kind of commodity wireless anti-theft detection alarm system.Belong to signal supervisory instrument and warning device class (G08B).
(2) background technology:
Along with the fast development in retail trade market, commodity anti-theft becomes the important topic of industry day by day, and is seriously corroding practitioner's retained proportion of the profit.The electronic article detection system is commonly called as main means and the instrument that commodity anti-theft apparatus is market, large supermarket, the technological prevention work of clothes chain store.The electronic article detection system is installed in outlet usually, detects the commodity of band anti-theft tag, prevents to carry secretly.The electronic article detection system is a kind of opening mode of operation, and receiver not only can detect the signal from the native system transmitter, simultaneously, also can receive electromagnetic influence in space and interference, may cause system works undesired when serious, wrong report occurs.Come from that commodity are stolen or the wrong report that electromagnetic wave causes if the user can't differentiate to report to the police, so just can not make correct processing, just the electronic article detection system performs practically no function.Installation practice in recent years, this problem has seriously perplexed equipment manufacturers and market user.The warning of existing goods detecting device is that acousto-optic is reported to the police simultaneously, can't distinguish wrong report.
(3) summary of the invention:
The commercial detector of the band warning function that the utility model provides will solve the existing goods detecting device exactly when disturbing big environment wrong report possible to occur, can warn in advance.Its technical scheme is as follows: a kind of commercial detector with warning function, comprise LC resonant tank, receiver on the anti-theft tag on transmitter, the commodity, and wherein receiver has antenna 1, waveform processing and amplifying unit 2A, alarm unit 3A; It is characterized in that: 1) the alarm treatment circuit in the alarm unit adopts the core digital integrated circuit; Alarm lamp circuit in the alarm unit is connected with two output pins of output driving circuit in the core digital integrated circuit respectively with the alarm buzzer circuit; 2) in the core digital integrated circuit, the pre-alarm condition of setting is T Light＜T Sound: T wherein LightBe alarm lamp circuit pre-alarm moment corresponding response signal period number, T SoundThe warning that is alarm buzzer starts corresponding response signal period number constantly, and response signal is the signal that transmits and send on the commodity anti-theft label of modulation by transmitter.Above-mentioned core digital integrated circuit can adopt single chip computer AT 89C2051, digital signal processor DSP (Digital Signal Processing) or ARM (Advanced RISC Machines),, 4000 series or 74 series digit integrated circuit.
A kind of commercial detector with warning function comprises LC resonant tank, receiver on the anti-theft tag on transmitter, the commodity, and wherein receiver has antenna 1, waveform processing and amplifying unit 2B, alarm unit 3B; It is characterized in that: 1) the alarm treatment circuit in the alarm unit adopts the thick film digital integrated circuit; Alarm lamp circuit in the alarm unit is connected with two output pins of output driving circuit in the thick film digital integrated circuit respectively with the alarm buzzer circuit;
2) in the thick film digital integrated circuit, the pre-alarm condition of setting is T Light＜T Sound: T wherein LightBe alarm lamp circuit pre-alarm moment corresponding response signal period number, T SoundThe warning that is alarm buzzer starts corresponding response signal period number constantly, and response signal is the signal that transmits and send on the commodity anti-theft label of modulation by transmitter.The adoptable acp chip of above-mentioned thick film digital integrated circuit is single chip computer AT 89S52, programmable logic device (PLD), digital signal processor DSP (Digital Signal Processing) or ARM (AdvancedRISC Machines).
Above-mentioned two kinds of schemes all can be provided with pre-alarm condition T LightBe taken as 0.5-0.9T SoundAnd the alarm lamp circuit can be placed in receiver frame top or the upper stand; The alarm buzzer circuit can be placed in the receiver gantry base.
The utility model beneficial effect:
1) the antitheft detection step of existing goods detecting device: 1. transmitter transmits; 2. the anti-theft tag on the commodity is made up of the LC resonant tank, produces response signal; 3. receiver detects the response signal of anti-theft tag, confirms the back warning through amplification, filtering, discriminating.That is to say that the response signal of the anti-theft tag periodic modulation that transmitted so receiver is judged the condition of reporting to the police, mainly is to differentiate response signal and count.Product is set count value, is exactly the valve of reporting to the police.Get 30 such as count value, mean that then when alerting signal satisfied 30 cycles, device drives was reported to the police.Count value is big more, and the warning reliability is high more, but reaction is blunt more; Otherwise count value is more little, and alarm response is sensitive more, but wrong report easily.The warning of existing commodity anti-theft apparatus has only acousto-optic output, and when promptly reporting to the police, hummer sends alarm sound, alarm lamp is lighted simultaneously.This patent makes full use of acousto-optic output, under the situation that does not increase equipment cost and use habit, change of voice light is reported to the police simultaneously and is reported to the police into the acousto-optic differentiation, allows alarm lamp also to light early warning separately in advance, make alarm lamp light up as early warning, warning, and hummer send alarm sound for reporting to the police.Wherein, when hummer sent alarm sound, alarm lamp was lighted warning simultaneously.By lighting in advance of alarm lamp, become prior-warning device and help the user to understand the electromagnetic environment that is invisible to the naked eye on every side, avoid wrong report that the consumer is produced bad disposal.Electromagnetic environment is disturbed intermittent often, is not having under the situation about disturbing, and can rely on the alarm interception to steal commodity.2) core digital integrated circuit of Cai Yonging and thick film digital integrated circuit all can be used the automatic accurate realization warning function of programming.And two kinds of integrated circuit output driving circuits that adopt can further drive pliotron, so that obtain to satisfy the sound and light alarm of various requirement with bigger voltage.
(4) description of drawings:
Fig. 1 embodiment 1 receiver circuit block diagram;
Fig. 2 receiver external form and alarm lamp circuit and the alarm buzzer location drawing;
Fig. 3 embodiment 1 receiver alarm treatment circuit, alarm lamp circuit and alarm buzzer circuit diagram;
Fig. 4 embodiment 2 receiver circuit block diagrams;
Fig. 5 embodiment 2 receiver alarm treatment circuits, alarm lamp circuit and alarm buzzer circuit diagram.
(5) embodiment:
Embodiment 1: see Fig. 1, see Fig. 2, Fig. 3
See Fig. 1, the receiver of the commercial detector of present embodiment band warning function has the antenna 1 that connects in turn; The waveform processing and the amplifying unit 2A that form by high-frequency amplifier circuit, detecting circuit, low-frequency amplifier and frequency discriminator, frequency multiplication of phase locked loop, filtering wave by prolonging time device, synchronizing signal; The alarm unit 3A that forms by comparer or AD converter, alarm treatment circuit, alarm lamp circuit and alarm buzzer circuit.See Fig. 3, the alarm treatment circuit adopts the core digital integrated circuit, and present embodiment core digital integrated circuit adopts single-chip microcomputer 10, and model is AT89C2051, and totally 20 pin are the common general single chips of existing market.The alarm lamp circuit is provided with pliotron 16.1, LED 16.2 (this end ground connection), and is connected by the output pin 16 of pliotron 16.1 collectors with single chip computer AT 89C2051 output driving circuit.The alarm buzzer circuit has pliotron 15.1, alarm buzzer 15.2 (this end ground connection), and be connected with the output pin 15 of single chip computer AT 89C2051 output driving circuit by pliotron 15.1 collectors, and two pliotrons 15.1 are connected with 16.1 emitter and add power supply 5V.Model is in the AT89C2051 single-chip microcomputer, and the condition that pre-alarm is the most necessary is T Light＜T Sound, the pre-alarm condition of its optimization is T Light=0.5-0.9T SoundT wherein LightBe alarm lamp circuit pre-alarm moment corresponding response signal period number, T SoundThe warning that is alarm buzzer starts corresponding response signal period number constantly, and response signal is the signal that transmits and send on the commodity anti-theft label of modulation by transmitter.
See Fig. 2, above-mentioned alarm lamp circuit 4 is placed in receiver frame 7 tops 5.Alarm buzzer circuit 8 is placed in the receiver gantry base 9.
The course of work: see Fig. 3, after single-chip microcomputer central processor CPU Piao grasps the response signal that comparer send fork-like farm tool used in ancient China, begin counting, such as getting 20 when count value, mean that then alarm lamp early warning moment T light satisfies 20 all after dates actions of response signal, single-chip microcomputer 16 pin drive and light the LED 16.2 at receiver top by the twin-core shielding line at this moment, carry out early warning (seeing Fig. 2, Fig. 3).Such as getting 30, mean that then the warning of alarm buzzer starts T constantly when count value SoundSatisfy 30 all after date actions of response signal, this moment, single-chip microcomputer 15 pin drove alarm buzzer 8 in the receiver chassis base 9, report to the police (seeing Fig. 2, Fig. 3).16 pin are exported in advance than 15 pin, i.e. T Light＜T Sound, when the LED lamp produced early warning, if be to disturb but not real warning at this moment, the user LED that can observe the equipment top lighted the back hummer and does not report to the police so, and showing has interference during this period of time, may report by mistake.Otherwise the LED at equipment top is in rest state always, and the warning of hummer is just more reliable so.The concrete choosing value available software routine analyzer of each market pre-alarm condition is determined.
Embodiment 2: see Fig. 4, Fig. 5, Fig. 2
Embodiment 2 difference from Example 1 are as follows: 1) relatively see Fig. 1 and Fig. 4, the receiver of the commercial detector of present embodiment 2 band warning functions has the antenna 1 that connects in turn; The waveform processing and the amplifying unit 2B that form by high-frequency amplifier circuit, detecting circuit, low-frequency amplifier; The alarm unit 3B that forms by alarm treatment circuit, alarm lamp circuit and alarm buzzer circuit.Just do not have frequency discriminator, synchronizing signal, frequency multiplication of phase locked loop, filtering wave by prolonging time device, comparer or AD converter in present embodiment waveform processing and the amplifying unit, similar functions is all realized by hardware in the thick film digital integrated circuit and software.2) the alarm treatment circuit adopts the thick film digital integrated circuit among the embodiment 2.See Fig. 5, described thick film digital integrated circuit is to adopt modular manner, core digital integrated circuit and device on every side are assembled together, and the reduction equipment volume of being convenient to set type, wherein present embodiment 2 core digital integrated circuits are AT89S52 for the single-chip microcomputer model.Thick film digital integrated circuit 11 module size 35 * 35mm 2, 44 pins.Wherein pin 1,2 is a sensitivity adjusting, comprises high sensitivity and common sensitivity, and hard label and soft label are selected; Pin 4,7,17,20,29 ground connection; Pin 5,6 connects crystal oscillator; Pin 8 resets; Pin 11 is the simulating signal input; Pin 12,13 synchronizing signals are handled; The input of pin 14,23,34,35,36,37,38,39,40,41,42,43 power supplys; Pin 15,16,18 is selected port for expanding, and is convenient to function upgrading, and wherein 15 pin are built-in synchronous selection, selects frequency hopping frequency 180 or 160HZ; The input of pin 19 synchronizing signals; Pin 22,24,25,26,30,31 is six debugging pilot lamp; Pin 27,28 data terminals; Pin 32,33 data selecting sides.
See Fig. 5, pin 9,10 is selected output state, comprises the selection of buzzer warning sound equipment, and early warning of LED lamp and non-early warning are selected.Pin 44 early warning output terminals.Pin 3 is the buzzer warning output terminal, and just the output pin of present embodiment thick film digital integrated circuit output driving circuit is 3,44.The alarm lamp circuit has pliotron 44.1 (grounded emitter), LED 44.2, and the light-emitting diodes pipe end powers up source+E C, and be connected with output pin 44 by pliotron 44.1 collectors.The alarm buzzer circuit has pliotron 3.1 (grounded emitter), alarm buzzer 3.2, and alarm buzzer 3.2 ends add power supply+E C, be connected with output pin 3 by pliotron 3.1 collectors.
Except that above, remaining circuit architectural feature and embodiment 1 are identical.

Claims (6)

1. the commercial detector with warning function comprises LC resonant tank, receiver on the anti-theft tag on transmitter, the commodity, and wherein receiver has antenna (1), waveform processing and amplifying unit (2A), alarm unit (3A); It is characterized in that:
1) the alarm treatment circuit in the alarm unit adopts the core digital integrated circuit; Alarm lamp circuit in the alarm unit is connected with two output pins of output driving circuit in the core digital integrated circuit respectively with the alarm buzzer circuit; 2) in the core digital integrated circuit, the pre-alarm condition of setting is T Light＜T Sound: T wherein LightBe alarm lamp circuit pre-alarm moment corresponding response signal period number, T SoundThe warning that is alarm buzzer starts corresponding response signal period number constantly, and response signal is the signal that transmits and send on the commodity anti-theft label of modulation by transmitter.
2. by the described commercial detector of claim 1, it is characterized in that the core digital integrated circuit adopts single chip computer AT 89C2051, digital signal processor DSP or ARM, 4000 series or 74 series digit integrated circuit.
3. the commercial detector with warning function comprises LC resonant tank, receiver on the anti-theft tag on transmitter, the commodity, and wherein receiver has antenna (1), waveform processing and amplifying unit (2B), alarm unit (3B); It is characterized in that:
1) the alarm treatment circuit in the alarm unit adopts the thick film digital integrated circuit; Alarm lamp circuit in the alarm unit is connected with two output pins of output driving circuit in the thick film digital integrated circuit respectively with the alarm buzzer circuit; 2) in the thick film digital integrated circuit, the pre-alarm condition of setting is T Light＜T Sound: T wherein LightBe alarm lamp circuit pre-alarm moment corresponding response signal period number, T SoundThe warning that is alarm buzzer starts corresponding response signal period number constantly, and response signal is the signal that transmits and send on the commodity anti-theft label of modulation by transmitter.
4. by the described commercial detector of claim 3, it is characterized in that the acp chip that adopts in the thick film digital integrated circuit is single chip computer AT 89S52, programmable logic device (PLD), digital signal processor DSP or ARM.
5. by claim 1 or 3 described commercial detectors, it is characterized in that pre-alarm condition T LightBe taken as 0.5-0.9T Sound
6. by claim 1 or 3 described commercial detectors, it is characterized in that alarm lamp circuit (4) is placed in receiver frame (7) top (5) or the upper stand (6); Alarm buzzer circuit (8) is placed in the receiver gantry base (9).
CN2011201175058U 2011-04-20 2011-04-20 Commodity detector with early warning function Expired - Fee Related CN202003472U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201175058U CN202003472U (en) 2011-04-20 2011-04-20 Commodity detector with early warning function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201175058U CN202003472U (en) 2011-04-20 2011-04-20 Commodity detector with early warning function

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107609440A (en) * 2017-08-31 2018-01-19 成都威图芯晟科技有限公司 A kind of detection method of electronic article detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107609440A (en) * 2017-08-31 2018-01-19 成都威图芯晟科技有限公司 A kind of detection method of electronic article detector
CN107609440B (en) * 2017-08-31 2020-12-08 成都威图芯晟科技有限公司 Detection method of commodity electronic detector

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C17 Cessation of patent right
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Granted publication date: 20111005

Termination date: 20140420