CN216596468U - Anti-theft monitoring device for goods in box - Google Patents
Anti-theft monitoring device for goods in box Download PDFInfo
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- CN216596468U CN216596468U CN202122526477.1U CN202122526477U CN216596468U CN 216596468 U CN216596468 U CN 216596468U CN 202122526477 U CN202122526477 U CN 202122526477U CN 216596468 U CN216596468 U CN 216596468U
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Abstract
The utility model belongs to the technical field of Electronic Article Surveillance (EAS), and discloses an anti-theft monitoring device for commodities in a box. The device comprises an MCU processor, a detection circuit, a sensor element, an alarm device, a conditioning circuit, an A/D converter and a power supply module; the MCU processor judges whether the commodity is stolen or not according to the oscillation amplitude of the detection circuit and controls the alarm device to give an alarm; the detection circuit can radiate an alternating magnetic field directionally towards the outer packaging box of the commodity, and the returned oscillating waveform can be detected by the receiver. Compared with other modes, the accuracy is higher, the core component inductance coil can be replaced by a copper wire or a PCB, the manufacturing cost is greatly reduced, the installation is convenient, and the operation is simpler and more convenient; the micro switch is introduced, so that the label can be dormant under the condition of no touch of people, the energy loss is reduced, and the button battery can supply power for use; the gum can move gluey, and the battery is removable, repeatedly usable, lower carbon environmental protection more.
Description
Technical Field
The utility model belongs to the technical field of Electronic Article Surveillance (EAS), and particularly relates to an anti-theft monitoring device for commodities in a box.
Background
The commodity anti-theft label belongs to an electronic commodity anti-theft system, and comprises an anti-theft soft label and an anti-theft hard label, wherein the anti-theft soft label and the anti-theft hard label are detected by a detection system arranged at an entrance or a cash register channel of a supermarket in a shopping mall, and when the label which is not processed by a cashier passes through the system, the system can send an alarm to remind the staff of paying attention. EAS theftproof spider label in the existing market, belong to the hard label of theftproof, mostly adopt the main part, four wire rope and chassis structure of this kind, the structure is complicated, and is with high costs, and the operation difficulty when binding the theftproof label on the box, need mention the box, therefore, in recent years, the replacement spider label product of this kind of wire rope that replaces the spider label with the electrically conductive ribbon has appeared in the market, but no matter be traditional spider theftproof label, still nearest replacement spider label product, all can't detect the inside condition of box, if the user only steals and takes away after the incasement commodity, then these two kinds of theftproof labels can't play the effect of theftproof early warning.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an anti-theft monitoring device for commodities in a box, which aims to solve the technical problem that the existing anti-theft device cannot detect the situation that the commodities in the box are stolen.
In order to solve the technical problems, the specific technical scheme of the anti-theft monitoring device for the commodities in the box is as follows:
an anti-theft monitoring device for commodities in a box comprises a shell and an electronic assembly arranged in the shell, wherein the circuit assembly comprises an MCU (microprogrammed control Unit) processor, a detection circuit, a sensor element, an alarm device, a conditioning circuit, an A/D (analog/digital) converter and a power supply module; the detection circuit is electrically connected with the conditioning circuit; the conditioning circuit is electrically connected with the A/D converter; the A/D converter is electrically connected with the MCU processor, and the alarm device is electrically connected with the MCU processor; the sensor element is electrically connected with the MCU processor; the power supply module is electrically connected with the MCU processor;
the MCU processor judges whether the commodity is stolen or not according to the oscillation amplitude of the detection circuit and controls the alarm device to give an alarm;
the detection circuit is an LC resonance circuit; the LC resonance circuit can radiate an alternating magnetic field in a directional mode towards the outer packaging box of the commodity, and the returned oscillating waveform can be detected by the MCU processor;
the sensor element adopts a microswitch, and the microswitch vibrates to trigger the MCU processor to wake up;
the alarm device is used for receiving an alarm signal sent by the MCU processor;
the conditioning circuit is used for amplifying a weak electric signal of the detection circuit;
the A/D converter is used for converting the analog electric signal output by the conditioning circuit into a digital electric signal;
the power supply module is used for providing power for the anti-theft monitoring device.
Further, the detection circuit is an LC resonance circuit composed of an inductance coil and a capacitor.
Furthermore, the surface of the shell is provided with a back adhesive for attaching the anti-theft detection device on an outer package box of a commodity.
Further, the back adhesive is a removable back adhesive.
Furthermore, the weak electric signal detected by the detection circuit is amplified by the conditioning circuit and then output to the A/D converter of the processor, the data processing unit in the MCU processor reads the data sampled by the A/D converter from the data buffer area for FFT conversion, and when the MCU processor detects the oscillation amplitude increasing signal of the detection circuit, the alarm signal is sent out, and the alarm device gives an alarm.
Further, the power supply module is a button battery.
The anti-theft monitoring device for commodities in the box has the following advantages: compared with other modes such as capacitance, the utility model has higher accuracy, because the inductive coil of the core part of the detection sensor can be replaced by a copper wire or a PCB, the manufacturing cost is greatly reduced, no external part is led out, the installation and the use are convenient, and the operation is simpler and more convenient; the micro switch is introduced, so that the label can be dormant under the condition of no touch of people, the energy loss is reduced, and the button battery can supply power for use; the gum can move the glue, and the battery is removable, satisfies used repeatedly's demand, and low carbon environmental protection more.
Drawings
FIG. 1 is a schematic view of the external structure of the anti-theft monitoring device for goods in a box according to the present invention;
FIG. 2 is an exploded view of the anti-theft monitoring device for the merchandise inside the box of the present invention;
FIG. 3 is a block diagram of a circuit assembly of the present invention;
FIG. 4 is a circuit schematic of the circuit assembly of the present invention;
FIG. 5 is a simulation of the sampling signal of the detection circuit of the present invention;
the notation in the figure is: 1. a housing; 2. an electronic component; 21. an MCU processor; 22. a detection circuit; 23. a sensor element; 24. an alarm device; 25. a conditioning circuit; 26. an A/D converter; 27. and a power supply module.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following describes an anti-theft monitoring device for goods inside a box in detail with reference to the attached drawings.
As shown in fig. 1 and 2, an anti-theft monitoring device for goods in a box comprises a housing 1 and an electronic component 2 arranged inside the housing, wherein the surface of the housing 1 is provided with a back adhesive and can be attached to an outer packaging box of the goods, and the outer packaging box can be a container made of any material or any shape and used for packaging or storing the goods. The gum is removable, makes things convenient for the change of battery. As shown in fig. 3 and 4, the circuit assembly 2 includes an MCU processor 21, a detection circuit 22, a sensor element 23, an alarm device 24, a conditioning circuit 25, an a/D converter 26, and a power supply module 27. The detection circuit 22 is electrically connected with the conditioning circuit 25; the conditioning circuit 25 is electrically connected to the a/D converter 26; the A/D converter 26 is electrically connected with the MCU processor 21, and the alarm device 24 is electrically connected with the MCU processor 21; the sensor element 23 is electrically connected with the MCU processor 21; the power supply module 27 is electrically connected with the MCU processor 21;
the MCU processor 21 determines whether the article is stolen according to the oscillation amplitude of the detection circuit 22, and controls the alarm device 24 to give an alarm. When no person touches the goods or the anti-theft detection device for a long time, the MCU processor 21 is awakened to enter a working state.
The detection circuit 22 is an LC resonance circuit composed of an inductance coil 221 and a capacitor 222; the alternating magnetic field can be directionally radiated towards the outer packaging box direction of the commodity, and the returned oscillating waveform can be detected by a receiver.
The sensor element 23 is a microswitch, and when a person touches the outer package box of the commodity or the anti-theft detection device, the microswitch vibrates to trigger the MCU processor 21 to wake up.
The alarm device 24 is used for receiving the alarm signal of the MCU processor 21 and sending out an alarm of commodity theft.
The conditioning circuit 25 is used to amplify the weak electrical signal of the detection circuit 22.
The a/D converter 26 is used to convert the analog electrical signal of the conditioning circuit 25 into a digital electrical signal.
The power supply module 27 is used for supplying power to the anti-theft monitoring device. Button cells may be used to supply power.
Specifically, when the article is in the outer packaging case, eddy currents are induced in the article by the alternating magnetic field as the article is within the range of the alternating magnetic field, which in turn induces a magnetic field that is opposite in direction to the excitation magnetic field. The generation of eddy currents takes energy away from the excitation magnetic field and thus affects the impedance of the inductor 221 or attenuates the LC resonant circuit. The oscillation of the LC resonant circuit is mapped as a current curve or a voltage curve due to the output signal of the LC resonant circuit. The output signal in this respect usually has a frequency which approximates the resonant frequency of the LC resonant circuit at which the LC resonant circuit can be excited.
When the article leaves the outer package, the oscillating strength in the frequency band of its output signal increases in the frequency range near the resonant frequency, since the article is outside the range of the alternating magnetic field. The amplitude of the oscillation of the output signal represents a measure of the attenuation of the LC tank circuit, and the amplitude of the oscillation increases. The oscillation amplitude can be used as a basis for determining whether the goods are in the package.
As shown in fig. 5, the weak electrical signal detected by the detection circuit 22 is amplified by the conditioning circuit 25 and then output to the a/D converter 26 of the MCU processor 21, the data processing unit in the MCU processor 21 reads the data sampled by the a/D converter 26 from the data buffer for FFT, the main chip of the MCU processor 21 outputs the identification signal S according to a fixed time period, and intercepts one of the identification signals S from a low level to a high level for sampling, and sequentially selects L points D from the point where the a/D sampling starts0、D1、D2…DL-1，1≤L≤2x，2xFor the number of data points for FFT (fast Fourier Transform) Transform, 2 remainxAnd after the L points are compensated with 0, performing FFT transformation. The result after the FFT is 2xA plurality of points, each point corresponding to a frequency point. Modulus A of this pointLI.e. the amplitude characteristic at that frequency value. Sampling at fixed time intervals (for example, after 30 seconds) is selected to obtain an amplitude value A'LComparison of A in sequenceLAnd A'LIf the amplitude values are different, the commodity is judged to be stolen, and an alarm signal is sent immediately. As shown in fig. 5, when the goods are stolen, the amplitude of the radiation waveform becomes large.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. An anti-theft monitoring device for commodities in a box comprises a shell (1) and an electronic component (2) arranged in the shell, and is characterized in that the electronic component (2) comprises an MCU (microprogrammed control Unit) processor (21), a detection circuit (22), a sensor element (23), an alarm device (24), a conditioning circuit (25), an A/D (analog/digital) converter (26) and a power supply module (27); the detection circuit (22) is electrically connected with the conditioning circuit (25); the conditioning circuit (25) is electrically connected with an A/D converter (26); the A/D converter (26) is electrically connected with the MCU processor (21), and the alarm device (24) is electrically connected with the MCU processor (21); the sensor element (23) is electrically connected with the MCU processor (21); the power supply module (27) is electrically connected with the MCU processor (21);
the MCU processor (21) judges whether the commodity is stolen or not according to the oscillation amplitude of the detection circuit (22) and controls the alarm device (24) to give an alarm;
the detection circuit (22) is an LC resonance circuit; the LC resonance circuit can radiate an alternating magnetic field in a directional mode towards the outer packaging box direction of the commodity, and the returned oscillating waveform can be detected by the MCU processor (21);
the sensor element (23) adopts a microswitch which vibrates to trigger the MCU processor (21) to wake up;
the alarm device (24) is used for receiving an alarm signal sent by the MCU processor (21);
the conditioning circuit (25) is used for amplifying weak electric signals of the detection circuit (22);
the A/D converter (26) is used for converting the analog electric signal output by the conditioning circuit (25) into a digital electric signal;
the power supply module (27) is used for supplying power to the anti-theft monitoring device.
2. The theft monitoring device for an in-box merchandise according to claim 1, characterized in that the detection circuit (22) is an LC resonance circuit consisting of an inductance coil (221) and a capacitor (222).
3. The device for theft monitoring of an item of merchandise inside a box according to claim 1, characterized in that the surface of the housing (1) is provided with an adhesive backing for attaching the theft detection device to the outer packaging box of the item of merchandise.
4. The device of claim 3, wherein the adhesive is a removable adhesive.
5. The anti-theft monitoring device for goods in a box according to claim 1, wherein a weak electrical signal detected by the detection circuit (22) is amplified by the conditioning circuit (25) and then output to the a/D converter (26), a data processing unit in the MCU processor (21) reads data sampled by the a/D converter (26) from the data buffer for FFT conversion, and when the MCU processor (21) detects that the oscillation amplitude of the detection circuit (22) becomes large, an alarm signal is sent out, and the alarm device (24) gives an alarm.
6. The device for the theft-proof monitoring of an in-box commodity according to claim 1, characterized in that the power supply module (27) is a button battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122526477.1U CN216596468U (en) | 2021-10-20 | 2021-10-20 | Anti-theft monitoring device for goods in box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122526477.1U CN216596468U (en) | 2021-10-20 | 2021-10-20 | Anti-theft monitoring device for goods in box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216596468U true CN216596468U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122526477.1U Active CN216596468U (en) | 2021-10-20 | 2021-10-20 | Anti-theft monitoring device for goods in box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216596468U (en) |
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2021
- 2021-10-20 CN CN202122526477.1U patent/CN216596468U/en active Active
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