CN202977056U - Demagnetizer for sound magnetic tag - Google Patents
Demagnetizer for sound magnetic tag Download PDFInfo
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- CN202977056U CN202977056U CN 201220621489 CN201220621489U CN202977056U CN 202977056 U CN202977056 U CN 202977056U CN 201220621489 CN201220621489 CN 201220621489 CN 201220621489 U CN201220621489 U CN 201220621489U CN 202977056 U CN202977056 U CN 202977056U
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Abstract
The utility model discloses a demagnetizer for a sound magnetic tag. The demagnetizer comprises a synchronous signal circuit, an emitting circuit, a receiving circuit, an acquisition circuit, a signal processing module, a frequency detecting module, a demagnetizing module, a communicating and displaying module and a main control module; wherein an output end of the synchronous signal circuit is respectively connected with input ends of the emitting circuit and the frequency detecting module; the output end of the emitting circuit is connected with the input end of the receiving circuit, the output end of the receiving circuit is connected with the input end of the acquisition circuit, the output end of the acquisition circuit is respectively connected with the signal processing module and the main control module, and the output end of the signal processing module is connected with the input end of the frequency detecting module; the output end of the main control module is respectively connected with the emitting circuit, the demagnetizing module and the communicating and displaying module; and the signal processing module and the frequency detecting module are respectively and bi-directionally communicated with the main control module. By the adoption of the demagnetizer, the lengthening of a demagnetizing distance and the enhancement of demagnetizing energy are realized, and the cost on design is lowered.
Description
Technical field
The utility model relates to a kind of audio magnetic label demagnetizer.
Background technology
Electric theft-proof system develops into present different principle situation various in style by early stage single principle single product through for many years development, adapts to the needs in the dissimilar shops such as general merchandise, supermarket, brand shop, library.Detection signal mode with its application is distinguished, and the EAS system mainly contains six types, is respectively electromagnetic wave system, microwave system, radio system, frequency division system, intelligent system harmony magnetic system.Electronic anti-theft label substantive characteristics corresponding to different systems is just not identical yet.Anti-theft tag as radio system is the ring coil type of 7.x～8.x megahertz, and the frequency of the anti-theft tag in the sound magnetic system is the 58KHZ low frequency tags; Electromagnetic wave system adopts electromagnetic wave as detection signal; The higher microwave of microwave system proportion is as detection signal.Along with the development of microelectric technique, the raising of Design and manufacture integrated circuit technique, in following several years, application-specific integrated circuit (ASIC) will be the developing direction of EAS system afterwards.Simultaneously, be accompanied by the integrated level of electronic device and improving constantly of intelligent level, the EAS system also can constantly advance always.Should be used for seeing that the radio system price is low from present market, occupation rate is high, but its principle defective is larger, just progressively be eliminated, also there is stronger application limitation in other several systems, and on sound magnetic system principle almost the characteristic of zero wrong report will substitute in a large number legacy system, make its development trend that becomes the EAS system, development sound magnetic system product is being focused in the EAS system factory commercial city of present global main flow.
The utility model content
The utility model purpose is to provide a kind of audio magnetic label demagnetizer for the defective that prior art exists.
The utility model for achieving the above object, adopt following technical scheme: a kind of audio magnetic label demagnetizer comprises synchronous signal circuit, radiating circuit, receiving circuit, Acquisition Circuit, signal processing module, frequency detection module, demagnetization module, communication and display module and main control module; Described synchronous signal circuit output is connected respectively input and is connected with frequency detection module with radiating circuit; Described radiating circuit output connects the input of receiving circuit, the output of described receiving circuit connects the input of Acquisition Circuit, the output of Acquisition Circuit connects respectively signal processing module and main control module, and the output of signal processing module is connected with the input of frequency detection module; The output of described main control module connects respectively radiating circuit, demagnetization module and communication and display module; Described signal processing module and described frequency detection module respectively with described main control module two-way communication.
The beneficial effects of the utility model: this equipment adopts brand-new design of electronic circuits, has realized the raising of demagnetization distance, and the enhancing of demagnetization energy has improved power parameter and reduced design cost.
1, the design adopts high-power energetic charges pump, in conjunction with the resonance radiating circuit, detect in the demagnetization of existing product 7.6CM improved 6CM on the basis of distance more than, can better be fit to the application of larger commodity.
2, adopt the novel multimode high-frequency PWM controller design boost topology degaussing circuit that boosts, more than degauss voltage is brought up to 300V, have lower remanent magnetism amount than on the market demagnetizer now.
3, adopting STM32 new A RM core processor is system core controller, and comparing existing product has larger advantage in cost performance and Functional Design flexibility.
4, system's emission is adopted the unicoil design with receiver module, has reduced to a great extent cost, has optimized design.
Description of drawings
Fig. 1 the utility model system architecture diagram.
Embodiment
Figure 1 shows that a kind of audio magnetic label demagnetizer, comprise synchronous signal circuit, radiating circuit, receiving circuit, Acquisition Circuit, signal processing module, frequency detection module, demagnetization module, communication and display module and main control module; Described synchronous signal circuit output is connected respectively input and is connected with frequency detection module with radiating circuit; Described radiating circuit output connects the input of receiving circuit, the output of described receiving circuit connects the input of Acquisition Circuit, the output of Acquisition Circuit connects respectively signal processing module and main control module, and the output of signal processing module is connected with the input of frequency detection module; The output of described main control module connects respectively radiating circuit, demagnetization module and communication and display module; Described signal processing module and described frequency detection module respectively with described main control module two-way communication.
Demagnetization method is: main control module sends to radiating circuit with electromagnetic wave signal, and radiating circuit sends to receiving circuit by transmitting coil with electromagnetic wave signal, and simultaneity factor enters label and differentiates state; Receiving circuit carries out small signal process after this electromagnetic wave signal is sent to Acquisition Circuit, then sends into signal processing module and selects needed harmonic signal; Riches all the way delivers to main control module and carry out amplitude detection for the harmonic signal of selecting, and another road harmonic signal carries out the harmonic frequency accuracy detection through frequency detection module, and determines whether that by each signal of decision circuitry qualified label enters by described main control module; If there is qualified label to enter, advanced rower label detect indication, triggering demagnetization module work after label drops to the demagnetization distance, and the label erasing state is shown by communication and display module.
Wherein, the mode that this system power supply module adopts Switching Power Supply to add direct current stabilizer realizes 18V, positive and negative 3.3V, 12V, 9V, and synchronizing signal is AC power frequency 50HZ synchronizing signal.System adopts STM32F103C8T6 as core controller, enters the self check state after system powers on, and detects whether synchronizing signal is normal, whether the demagnetization high pressure produces and reach 320V, whether the test environment degree of disturbance reaches normal running (operation) conditions.
The specific works principle is, after system enters normal operation, be interrupted by emitter region and detection zone by the ARM controller and send the 58KHZ square wave, give transmitter module, the signal transformation circuit that forms through capacitor C 200, base resistance R200, pull-up resistor R201, switching tube Q205, carry out power amplification by charge pump TC4422 and send into the series resonance radiating circuit that capacitor C 204 and inductance L 10 form, to external radiation 58KHZ electromagnetic wave signal, simultaneity factor enters label and differentiates state by coil.
it is the positive and negative 200HZ of 58KHZ that radiating circuit adopts system's tranmitting frequency, has very high accuracy of detection, after having 58KHZ sound label to enter detection zone, because tuning fork effect can induce the signal wave that contains multiple harmonic on detection zone time period interior loop, R202, C202, C203, CR203, the receiving circuit that CR204 forms is sent this signal into the Acquisition Circuit that is comprised of threshold amplifier LT1783CS6 and small signal amplifier LM6132AIM and is carried out small signal process, then send into signal processing module and select needed harmonic wave, signal processing module comprises that the signal that is comprised of sill amplifier LT1783CS6 and small signal amplifier LM6132AIM amplifies, bandpass filtering, frequency selection circuit forms, the signal of handling well is divided into two-way through the signal follow circuit that U7 forms, one the tunnel gives the ARM controller carries out amplitude detection, other one the tunnel carries out the harmonic frequency accuracy detection through frequency detection circuit, pass through each signal of the comprehensive decision circuitry of software algorithm by the ARM controller at last, determined whether that qualified label enters.After system is determined with the 58KHZ audio magnetic label and enters, advanced rower label detect indication, triggering degaussing circuit work after label drops to the demagnetization distance, corresponding system works indication is arranged simultaneously, degauss voltage employing boost topology is boosted and is reached 320V, the demagnetization mode adopts the underdamped oscillation demagnetization, remanent magnetism amount and the end.Communication module adopts serial communication, is used for arranging and adjustment System parameter and working environment parameter.
The demagnetization module comprises demagnetization high-tension circuit and degaussing circuit two parts, and the demagnetization high-tension circuit adopts the boost topology that is comprised of inductance L 3, switching tube Q203, diode CR205, CR206, resistance R 220, capacitor C230, C220 and the storage capacitor E12 precircuit that boosts.Control section adopts the high-voltage control circuit by the high frequency multimode PWM controlling composition of UCC39421 group, and tool is with good stability and flexibility.Degaussing circuit mainly is comprised of E12, Q202, U204 and peripheral element, provides triggering signal by the ARM controller and carries out demagnetization.
The above is only preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (8)
1. an audio magnetic label demagnetizer, is characterized in that, comprises synchronous signal circuit, radiating circuit, receiving circuit, Acquisition Circuit, signal processing module, frequency detection module, demagnetization module, communication and display module and main control module; Described synchronous signal circuit output is connected respectively input and is connected with frequency detection module with radiating circuit; Described radiating circuit output connects the input of receiving circuit, the output of described receiving circuit connects the input of Acquisition Circuit, the output of Acquisition Circuit connects respectively signal processing module and main control module, and the output of signal processing module is connected with the input of frequency detection module; The output of described main control module connects respectively radiating circuit, demagnetization module and communication and display module; Described signal processing module and described frequency detection module respectively with described main control module two-way communication.
2. a kind of audio magnetic label demagnetizer as claimed in claim 1, is characterized in that, described synchronous signal circuit adopts AC power frequency 50HZ synchronizing signal.
3. a kind of audio magnetic label demagnetizer as claimed in claim 1, it is characterized in that, described demagnetization module comprises demagnetization high-tension circuit and degaussing circuit two parts, and wherein said demagnetization high-tension circuit adopts the boost topology that is comprised of inductance, switching tube, diode, resistance, capacitor and the storage capacitor precircuit that boosts.
4. a kind of audio magnetic label demagnetizer as claimed in claim 1, is characterized in that, the demagnetization mode of described demagnetization module adopts the underdamped oscillation demagnetization.
5. a kind of audio magnetic label demagnetizer as claimed in claim 1, is characterized in that, described main control module adopts STM32 ARM core processor.
6. a kind of audio magnetic label demagnetizer as claimed in claim 1, is characterized in that, described radiating circuit and described receiving circuit adopt the unicoil design.
7. a kind of audio magnetic label demagnetizer as claimed in claim 1, is characterized in that, described signal acquisition circuit is comprised of threshold amplifier and small signal amplifier.
8. a kind of audio magnetic label demagnetizer as claimed in claim 1, is characterized in that, described communication and display module adopt serial communication, and it is used for arranging and adjustment System parameter and working environment parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220621489 CN202977056U (en) | 2012-11-22 | 2012-11-22 | Demagnetizer for sound magnetic tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220621489 CN202977056U (en) | 2012-11-22 | 2012-11-22 | Demagnetizer for sound magnetic tag |
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| Publication Number | Publication Date |
|---|---|
| CN202977056U true CN202977056U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220621489 Withdrawn - After Issue CN202977056U (en) | 2012-11-22 | 2012-11-22 | Demagnetizer for sound magnetic tag |
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| CN (1) | CN202977056U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021624A (en) * | 2012-11-22 | 2013-04-03 | 无锡机电高等职业技术学校 | Acoustic-magnetic label demagnetizer and demagnetization method |
-
2012
- 2012-11-22 CN CN 201220621489 patent/CN202977056U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021624A (en) * | 2012-11-22 | 2013-04-03 | 无锡机电高等职业技术学校 | Acoustic-magnetic label demagnetizer and demagnetization method |
| CN103021624B (en) * | 2012-11-22 | 2015-01-28 | 无锡机电高等职业技术学校 | Acoustic-magnetic label demagnetizer and demagnetization method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20150128 |
|
| RGAV | Abandon patent right to avoid regrant |