CN106600878A - Near field electromagnetic wave antitheft system and control method thereof - Google Patents

Abstract

A near-field electromagnetic wave anti-theft system includes a transmitting module, a reflection module, a reflection module and an alarm module; the transmitting module includes an electromagnetic wave signal generator, a power amplifier and an electromagnetic wave transmitter; the transmitting module includes an electromagnetic wave signal generator; the The receiving module includes an electromagnetic wave receiver, an analog-to-digital converter, and a microprocessor; the alarm module includes a vibration alarm component and a sound alarm component; the transmitting module and the analog-to-digital converter are synchronized by electrical signals, and the micro The processor calculates the distance between the reflection module and the receiving module according to the information provided by the analog-to-digital converter, and sends a first-level alarm signal, a second-level alarm signal, and a third-level alarm signal to the alarm module according to the calculated distance. Level alarm signals, different levels of alarm signals are realized through the vibration alarm component and the sound alarm component.

Description

A near-field electromagnetic wave anti-theft system and its control method

technical field

The invention relates to the field of electronic technology and anti-theft alarm, in particular to an electromagnetic wave anti-theft system and a control method thereof.

Background technique

Some network operators have proposed corresponding countermeasures against the anti-theft problem, such as adding fingerprint, voice recognition, camera, GPS, Bluetooth, and wireless functions. However, looking at these anti-theft functions, they can only passively prevent others from infringing on their own finances by illegal means, or provide clues to recover after being stolen; Financial loss has no positive meaning. Therefore, we should provide a device that actively allows others to voluntarily give up illegal theft or timely remind the owner when their property is illegally violated. A security system that sends out a burglar alarm if something unusual is detected has practical implications.

Contents of the invention

The technical problem to be solved by the present invention is to provide a near-field electromagnetic wave anti-theft system and a control method thereof by overcoming the above-mentioned deficiencies in the prior art.

A near-field electromagnetic wave anti-theft system, comprising a transmitting module, a reflecting module, a receiving module and an alarm module; the transmitting module comprises an electromagnetic wave signal generator, a power amplifier and an electromagnetic wave transmitter; the reflecting module comprises an electromagnetic wave reflector; the receiving The module includes an electromagnetic wave receiver, an analog-to-digital converter and a microprocessor; the alarm module includes a vibration alarm component and a sound alarm component;

The transmitting module and the receiving module are synchronized by electrical signals; the output end of the electromagnetic wave signal generator is connected to the input end of the power amplifier, and the output end of the power amplifier is connected to the electromagnetic wave transmitter; the reflection The module is used to emit the electromagnetic wave and reflect the emitted electromagnetic wave to the electromagnetic wave receiver; the output end of the electromagnetic wave receiver is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to the The input end of the microprocessor, the output end of the microprocessor is connected to the alarm module;

The electromagnetic wave signal generator is used to emit electromagnetic waves of a specific frequency, and the transmitting module is provided with two electromagnetic wave signal generators emitting electromagnetic waves of different frequencies to enhance the resistance to external electromagnetic wave interference.

The analog-to-digital converter converts the received analog signal into a digital signal and sends it to the microprocessor, and the microprocessor is used to calculate the signal from the reflection module to the electromagnetic wave receiver according to the signal of the analog-to-digital converter. The distance of the sensor, and according to the calculated distance to the alarm module to send a first-level alarm signal, a second-level alarm signal and a third-level alarm signal, the vibration alarm component according to the first-level alarm signal A vibration alarm is performed, and the sound alarm component performs alarms of different sound decibel levels according to the second level alarm signal and the third level alarm signal.

Further preferably, the transmitting module, the receiving module and the alarm module are integrally arranged on the outer surface of the anti-theft object, and the reflection module is arranged at a predetermined distance from the anti-theft object.

Further preferably, define the initial distance from the reflection module to the electromagnetic wave receiver as L, and the actual distance D between the reflection module and the electromagnetic wave signal receiver;

When 30cm≥D-L>3cm, the microprocessor operation module sends a first-level alarm signal to the alarm module, and the vibration alarm component performs a vibration alarm according to the first-level alarm signal; when 50cm≥D-L> 30cm, the microprocessor operation module sends a second-level alarm signal to the alarm module, and the sound alarm component performs a warning sound lower than 50 decibels according to the second-level alarm signal; when D-L>50cm , the microprocessor operation module sends a third-level alarm signal to the alarm module, and the sound alarm component makes a warning sound higher than 80 decibels according to the third-level alarm signal.

The above-mentioned distance interval is only a relatively suitable distance setting in the embodiment of the present invention, and the user can make an adjustment design of the distance interval according to the specific use of the near-field electromagnetic wave anti-theft system of the present invention.

Further preferably, the near-field electromagnetic wave anti-theft system also includes an energy module and a control module, the energy module provides energy for the transmitting module, the receiving module and the alarm module; the control module is used to control the near-field electromagnetic wave Anti-theft system activation and deactivation. The energy module can be a battery, and the control module can control the startup and shutdown of the anti-theft system directly by controlling the battery, or can control the startup and shutdown of the anti-theft system by controlling the transmitting module and the receiving module. The energy module and the control module can be integrated with the transmitting module, receiving module and alarm module, so as to be used on objects in non-fixed places such as wallets and suitcases.

Further preferably, define the initial distance from the reflection module to the electromagnetic wave receiver as L, and the actual distance D between the reflection module and the electromagnetic wave receiver; when -50cm≦D-L<-3cm, the The microprocessor operation module sends out a second-level alarm signal to the alarm module, and the sound alarm component performs a warning sound lower than 50 decibels according to the second-level alarm signal; when D-L<-50cm, the The microprocessor operation module sends a third-level alarm signal to the alarm module, and the sound alarm component makes a warning sound higher than 80 decibels according to the third-level alarm signal.

Further preferably, the near-field electromagnetic wave anti-theft system further includes a wireless transmitting module for contacting the internal security system or the external security system, when the microprocessor operation module sends a third-level alarm signal to the vibration alarm component , the microprocessor operation module transmits an alarm signal to the wireless transmission module at the same time, and the wireless transmission module sends an alarm to an internal security system or an external security system according to the alarm signal.

The internal security system can be the security department of the community or the company, and the external security system can be the police station.

Further preferably, the alarm module further includes a light alarm component, configured to emit alarm lights of different colors according to the first level alarm signal, the second level alarm signal and the third level alarm signal.

Further preferably, the anti-theft object using the near-field electromagnetic wave anti-theft system can be an item placed in a fixed position such as a work of art, a safe, or a mobile item such as a car, a suitcase, or a wallet.

The present invention also provides a control method of a near-field electromagnetic wave anti-theft system, comprising the following steps:

S1: the electromagnetic wave generating module transmits electromagnetic wave signals to the reflecting module through the power amplification and electromagnetic wave transmitting module and the transmitting antenna;

S2: the receiving antenna receives the reflected electromagnetic wave signal, and feeds it back to the microprocessor operation module;

S3: The microprocessor operation module calculates the distance between the reflection module and the receiving antenna according to the reflected electromagnetic wave signal, and sends a first-level alarm signal and a second-level alarm signal to the alarm module according to the distance. Level 2 warning signal and Level 3 warning signal;

S4: The vibration alarm component performs alarms of different levels according to different levels of alarm signals.

Further preferably, the near-field electromagnetic wave anti-theft system further includes a wireless transmitting module for communicating with an internal security system or an external security system, and the control method further includes:

When the microprocessor sends a third-level alarm signal to the vibration alarm component, the microprocessor transmits an alarm signal to the wireless transmitting module at the same time, and the wireless transmitting module transmits an alarm signal to the internal security according to the alarm signal. The system or external security system sounds an alarm.

Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention judges the movement of the protected object through the emission, emission and reception of electromagnetic wave signals, thereby judging whether the object is stolen and controlling the alarm, and the system cost is low , low energy consumption, not affected by the position of the object, not easily disturbed by the external environment, not easily detected and destroyed by the thief in advance, good anti-theft performance, easy to realize;

2. When the thief moves the object equipped with the near-field electromagnetic wave anti-theft system, the system will judge different levels of alarm signals according to different distances and perform different levels of alarms. When the thief acts, through vibration, flashing , The decibel increase of the sound will give a warning step by step, so that the thief will have a sense of crisis, let him give up the idea of stealing, return the pre-stolen object to its original position or directly put down the object to give up illegal theft; or make the owner get status information in time, which will It has a certain effect on effectively driving away thieves and improving the theft rate.

3. This system can use its own small power supply and switch, which is convenient for some important items that need to be moved, such as suitcases, wallets, cars, etc.

4. The system is equipped with a wireless transmitter module. In the event of an emergency, the internal security system plan will be activated as soon as possible, and relevant personnel will be notified to deal with the emergency, to minimize the danger from continuing to occur, and the external community security, 110, etc. will be notified in time for rapid support. Electromagnetic waves have good directivity and can become rays and propagate directionally.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a near electric field electromagnetic wave anti-theft system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the application of the embodiment of the present invention shown in FIG. 1 .

Fig. 3 is a schematic structural diagram of a near electric field electromagnetic wave anti-theft system according to another embodiment of the present invention.

Description of main component symbols

Transmitter module 100

Reflex Module 200

Receiver module 300

Alarm Module 400

Energy Module 500

Control Module 600

Electromagnetic wave signal generator 110

power amplifier 120

Magnetic Wave Launcher 130

Electromagnetic wave reflector 210

Electromagnetic wave receiver 310

Analog-to-Digital Converter 320

microprocessor 330

Vibration Alarm Assembly 410

Audible Alarm Kit 420

Light alarm assembly 430

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a kind of near-field electromagnetic wave anti-theft system comprises a transmitting module 100, a reflecting module 200, a reflecting module 200 and an alarm module 400; the transmitting module 100 comprises an electromagnetic wave signal generator 110, a power amplifier 120 and an electromagnetic wave transmitter 130; the reflection module 200 includes an electromagnetic wave reflector 210; the receiving module includes an electromagnetic wave receiver 310, an analog-to-digital converter 320 and a microprocessor 330; the alarm module 400 includes a vibration alarm assembly 410 and an audio alarm assembly 420;

The transmission module 100 and the reflection module 200 are synchronized by electrical signals; the output terminal of the electromagnetic wave signal generator 110 is connected to the input terminal of the power amplifier 120, and the output terminal of the power amplifier 120 is connected to the electromagnetic wave transmitting The reflector 130; the reflection module 200 is used to emit the electromagnetic wave and reflect the electromagnetic wave emitted by it to the electromagnetic wave receiver 310; the output end of the electromagnetic wave receiver 310 is connected to the input end of the analog-to-digital converter 320, so The output end of the analog-to-digital converter 320 is connected to the input end of the microprocessor 330, and the output end of the microprocessor 330 is connected to the alarm module 400;

The electromagnetic wave signal generator 110 is used to emit electromagnetic waves of a specific frequency, and the transmitting module 100 is provided with 2-3 electromagnetic wave signal generators 110 .

The analog-to-digital converter 320 converts the received analog signal into a digital signal and sends it to the microprocessor 330, and the microprocessor 330 is used to calculate the reflection module according to the signal of the analog-to-digital converter 320 200 to the electromagnetic wave receiver 310, and send a first-level alarm signal, a second-level alarm signal, and a third-level alarm signal to the alarm module 400 according to the calculated distance, and the vibration alarm component 410 performs a vibration alarm according to the first-level alarm signal, and the sound alarm component 420 performs alarms of different sound decibel levels according to the second-level alarm signal and the third-level alarm signal.

In Embodiment 1: the transmitting module 100, the reflecting module 200 and the alarm module 400 are integrally arranged on the outer surface of the safe, and the reflecting module 200 is arranged at a predetermined distance from the anti-theft object.

Anti-theft setting one: define the initial distance from the reflection module 200 to the electromagnetic wave receiver 310 as L, and the actual distance D between the reflection module 200 and the electromagnetic wave signal receiver;

When 30cm≥D-L>3cm, the microprocessor operation module sends a first-level alarm signal to the alarm module 400, and the vibration alarm component 410 performs a vibration alarm according to the first-level alarm signal; when 50cm≥ When D-L>30cm, the microprocessor operation module sends a second-level alarm signal to the alarm module 400, and the sound alarm assembly 420 sends a warning sound of 40 decibels according to the second-level alarm signal; when D-L When >50cm, the microprocessor operation module sends a third-level alarm signal to the alarm module 400, and the sound alarm component 420 emits a 90 decibel warning sound according to the third-level alarm signal.

Anti-theft setting two: define the initial distance from the reflection module 200 to the electromagnetic wave receiver as L, and the actual distance D between the reflection module 200 and the electromagnetic wave receiver 310;

When -50cm≦D-L<-3cm, the microprocessor operation module sends a second-level alarm signal to the alarm module 400, and the sound alarm component 420 sends a 40 decibel warning according to the second-level alarm signal Prompt tone; when D-L<-50cm, the microprocessor computing module sent a third-level alarm signal to the alarm module 400, and the sound alarm assembly 420 sent a 90-decibel warning according to the third-level alarm signal beep.

Anti-theft setting three: the near-field electromagnetic wave anti-theft system further includes a wireless transmission module 100 for contacting the internal security system or the external security system, when the microprocessor operation module sends a third-level alarm to the vibration alarm component 410 signal, the microprocessor computing module simultaneously transmits an alarm signal to the wireless transmitting module 100, and the wireless transmitting module 100 sends an alarm to an internal security system or an external security system according to the alarm signal.

The internal security system can be the security department of the community or the company, and the external security system can be the police station.

Anti-theft setting four: the alarm module 400 further includes a light alarm component 430 for sending out a vibration or sound alarm according to the first level alarm signal, the second level alarm signal and the third level alarm signal Warning lights in different colors.

In Embodiment 2: the near-field electromagnetic wave anti-theft system also includes an energy module 500 and a control module 600, and the energy module 500 provides energy for the transmitting module 100, the reflecting module 200 and the alarm module 400; The control module 600 is used to control the startup and shutdown of the near-field electromagnetic wave anti-theft system. The energy module 500 can be a battery, and the control module 600 can control the startup and shutdown of the anti-theft system directly by controlling the battery, or can control the startup and shutdown of the anti-theft system by controlling the transmission module 100 and the reflection module 200 .

The energy module, the control module 600, the transmitter module 100, the reflector module 200, and the alarm module 400 are integrated together and fixed on the wallet; the reflector module 200 is set as a keychain, hung on the waist or Put it in your pocket. When the wallet is stolen by others and leaves the reflective module for 30cm, the alarm module 400 will send a vibration prompt; after leaving the reflective module for 35cm, the alarm module 400 will send out an alarm sound of 35 decibels; after leaving the reflective module for 50cm, the alarm module 400 will send out an alarm of 95 decibels beep.

A control method of a near-field electromagnetic wave anti-theft system, comprising the following steps:

S1: the electromagnetic wave generating module transmits electromagnetic wave signals to the reflecting module 200 through the power amplification and electromagnetic wave transmitting module 100 and the transmitting antenna;

S2: the receiving antenna receives the reflected electromagnetic wave signal, and feeds it back to the microprocessor operation module;

S3: The microprocessor operation module calculates the distance between the reflection module 200 and the receiving antenna according to the reflected electromagnetic wave signal, and sends a first-level alarm signal to the alarm module 400 according to the distance , a second level warning signal and a third level warning signal; and

S4: The vibration alarm component 410 performs alarms of different levels according to different levels of alarm signals.

The near-field electromagnetic wave anti-theft system also includes a wireless transmitting module 100 for contacting an internal security system or an external security system, and the control method further includes:

When the microprocessor sends a third-level alarm signal to the vibration alarm assembly 410, the microprocessor transmits an alarm signal to the wireless transmitting module 100 at the same time, and the wireless transmitting module 100 transmits an alarm signal according to the alarm signal. Alert internal security systems or external security systems.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (10)

1. A near-field electromagnetic wave anti-theft system, characterized in that: comprise a transmitting module, a reflecting module, a receiving module and an alarm module; the transmitting module comprises an electromagnetic wave signal generator, a power amplifier and an electromagnetic wave launcher; the reflecting module comprises an electromagnetic wave reflector; the receiving module includes an electromagnetic wave receiver, an analog-to-digital converter, and a microprocessor; the alarm module includes a vibration alarm assembly and a sound alarm assembly; The transmitting module and the receiving module are synchronized by electrical signals; the output end of the electromagnetic wave signal generator is connected to the input end of the power amplifier, and the output end of the power amplifier is connected to the electromagnetic wave transmitter; the reflection The module is used to emit the electromagnetic wave and reflect the emitted electromagnetic wave to the electromagnetic wave receiver; the output end of the electromagnetic wave receiver is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to the The input end of the microprocessor, the output end of the microprocessor is connected to the alarm module; The analog-to-digital converter converts the received analog signal into a digital signal and sends it to the microprocessor, and the microprocessor is used to calculate the signal from the reflection module to the electromagnetic wave receiver according to the signal of the analog-to-digital converter. The distance of the sensor, and according to the calculated distance to the alarm module to send a first-level alarm signal, a second-level alarm signal and a third-level alarm signal, the vibration alarm component according to the first-level alarm signal A vibration alarm is performed, and the sound alarm component performs alarms of different sound decibel levels according to the second level alarm signal and the third level alarm signal. 2. The near-field electromagnetic wave anti-theft system according to claim 1, characterized in that: the transmitting module, the receiving module and the alarm module are integrally arranged on the outer surface of the anti-theft object, and the reflecting module and the The anti-theft object is set according to a predetermined distance. 3. The near-field electromagnetic wave anti-theft system according to claim 2, characterized in that: define the initial distance from the reflection module to the electromagnetic wave receiver as L, and the distance between the reflection module and the electromagnetic wave signal receiver The actual distance D; when 30cm≥D-L>-5cm, the microprocessor operation module sends a first-level alarm signal to the alarm module, and the vibration alarm component performs a vibration alarm according to the first-level alarm signal ; When 50cm≥D-L>30cm, the microprocessor operation module sends a second-level alarm signal to the alarm module, and the sound alarm component carries out a warning prompt lower than 50 decibels according to the second-level alarm signal sound; when D-L>50cm, the microprocessor computing module sent a third-level alarm signal to the alarm module, and the sound alarm assembly carried out a warning tone higher than 80 decibels according to the third-level alarm signal . 4. The near-field electromagnetic wave anti-theft system according to claim 2, is characterized in that: it also includes an energy module and a control module, and the energy module provides energy for the transmitting module, the receiving module and the alarm module; The above control module is used to control the startup and shutdown of the near-field electromagnetic wave anti-theft system. 5. The near-field electromagnetic wave anti-theft system according to claim 3, characterized in that: define the initial distance from the reflection module to the electromagnetic wave receiver as L, and the distance between the reflection module and the electromagnetic wave receiver Actual distance D; when -50cm≦D-L<-3cm, the microprocessor operation module sends a second-level alarm signal to the alarm module, and the sound alarm component performs a lower-level alarm signal according to the second-level alarm signal. 50 decibel warning tone; when D-L<-50cm, the microprocessor operation module sent a third-level alarm signal to the alarm module, and the sound alarm component was higher than the third-level alarm signal according to the third-level alarm signal. 80 decibel warning tone. 6. The near-field electromagnetic wave anti-theft system according to claim 5, characterized in that: further comprising a wireless transmitting module for contacting with an internal security system or an external security system, when the microprocessor operation module sends a message to the vibration alarm assembly When the third-level alarm signal is sent, the microprocessor operation module simultaneously transmits an alarm signal to the wireless transmitting module, and the wireless transmitting module sends an alarm to an internal security system or an external security system according to the alarm signal. 7. The near-field electromagnetic wave anti-theft system according to claim 1, characterized in that: the alarm module further includes a light alarm component, which is used for according to the first level alarm signal, the second level alarm signal and the The third-level alarm signal emits warning lights of different colors. 8. The near-field electromagnetic wave anti-theft system according to claim 2, wherein the anti-theft objects include artworks and safes. 9. A control method of the near-field electromagnetic wave anti-theft system as claimed in claim 1, comprising the following steps: S1: the electromagnetic wave signal generator transmits an electromagnetic wave signal to the reflection module through the power amplifier and the electromagnetic wave transmitter; S2: the electromagnetic wave signal reflected by the electromagnetic wave receiver, and the signal is fed back to the microprocessor through the analog-to-digital converter; S3: The microprocessor operation module calculates the distance between the reflection module and the electromagnetic wave signal receiver according to the reflected electromagnetic wave signal, and sends a first-level alarm signal to the alarm module according to the distance , the second-level alarm signal and the third-level alarm signal; S4: The vibration alarm component performs alarms of different levels according to different levels of alarm signals. 10. The control method according to claim 9, characterized in that: the near-field electromagnetic wave anti-theft system further includes a wireless transmitting module for contacting an internal security system or an external security system, and the control method further comprises: When the microprocessor sends a third-level alarm signal to the vibration alarm component, the microprocessor transmits an alarm signal to the wireless transmitting module at the same time, and the wireless transmitting module transmits an alarm signal to the internal security according to the alarm signal. The system or external security system sounds an alarm.