Very-low-frequency induction intelligent seal for judicial investigation

Abstract

The invention relates to the technical field of intelligent induction, in particular to a judicial check very-low-frequency induction intelligent seal strip which comprises a sensor module, an alarm control unit and a terminal. The alarm control unit is used for processing and judging the signal and giving an alarm notification; the alarm control unit comprises a processor, a trigger and a communication unit. The very-low-frequency inductive sensor is adopted, has the characteristic of low power consumption, can work without depending on an external power supply, is particularly suitable for remote or unattended monitoring application, and also avoids the risk that a circuit is cut off or tampered; moreover, the seal has the physical characteristics of early warning in advance of spatial distance of non-contact induction of human body movement and non-biological non-response, can quickly detect the change of the state of the seal, and sends out an alarm signal at the first time, so that the loss is reduced and the response speed is increased; meanwhile, the very-low-frequency inductive sensor can be in wireless communication with a terminal, and alarm information can be received and displayed in real time without being checked by field personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of judicial sealing, and in particular to a very low frequency induction intelligent seal for judicial sealing. Background Art

[0002] The judicial seal intelligent seal induction alarm system is a security monitoring solution, which is mainly used to ensure the safety of closed door and window areas or items to prevent unauthorized access or movement. This type of system is usually used for doors and windows, warehouses, storage rooms, valuables storage, transport containers, safes and other property areas that need to be monitored. The advancement of modern sensor and communication technology allows devices to connect and communicate with each other to form the Internet of Things. This technology makes remote monitoring and real-time alarm possible. In the prior art, the judicial seal is ordinary paper, which loses its meaning if it is torn at will. The video surveillance alarm system is easily blocked or destroyed by humans, the system may fail, and the operating cost is high; the infrared sensor depends on the lighting conditions, and the performance in low-light or no-light environment may decline. It is also easily affected by the environmental heat source or temperature change to produce missed reports and false alarms, and the system may fail; the contact alarm belongs to the post-alarm, which is easy to cause property loss. In view of the above problems, the present invention proposes a judicial seal very low frequency induction intelligent seal to solve the above problems. Summary of the invention

[0003] The main purpose of the present invention is to provide a judicial sealing very low frequency induction smart seal to solve the problems raised in the relevant technology.

[0004] In order to achieve the above object, according to one aspect of the present invention, a judicial seizure VLF induction smart seal is provided, comprising:

[0005] A sensor module, an alarm control unit and a terminal. The sensor module is used to collect human signals and transmit the collected human signals to the alarm control unit. The alarm control unit is used to process and judge the signals and issue an alarm notification.

[0006] Wherein, the alarm control unit includes a processor, a trigger, and a communication unit;

[0007] The processor is used to detect whether the transmitted signal is abnormal according to the trigger condition;

[0008] The trigger receives all signals from the processor and is activated and triggers an alarm when an abnormal signal is received, generating alarm information.

[0009] The communication unit is used to send the alarm information to the terminal, and the staff takes corresponding measures to deal with it.

[0010] Further, the sensor module is connected to a very low frequency induction sensor, which includes a pulse generator, an excitation wire, a sensing wire, a target detection module and a timer. The working process is as follows:

[0011] S1: The pulse generator of the sensor module generates a very low frequency pulse signal of a certain amplitude to generate an electromagnetic field along the axis of the excitation wire and form a very low frequency virtual space barrier in 360 degrees;

[0012] S2: The virtual space barrier formed by the electromagnetic field. When encountering the human body, the movement of the human body breaks the balance of the very low frequency virtual space electromagnetic field;

[0013] S3: The induction wire of the very low frequency induction sensor is within the intensity range of the electromagnetic field of the excitation wire, and senses the change in the electromagnetic field intensity of the very low frequency virtual space barrier caused by human movement, and converts it into an electrical signal;

[0014] S4: The induction wire of the very low frequency induction sensor is within the intensity range of the electromagnetic field of the excitation wire, and senses the change in the electromagnetic field intensity of the very low frequency virtual space barrier caused by human movement, and converts it into an electrical signal;

[0015] S4: The target detection module converts the human body movement that destroys the electric field balance into an electric signal algorithm to perform distance detection on the received electric signal.

[0016] Furthermore, the specific steps of S1 are:

[0017] S11: The excitation wire is firstly generated to generate a very low frequency pulse signal;

[0018] S12: modulating the generated very low frequency name signal;

[0019] S13: amplifying the modulated very low frequency pulse signal;

[0020] S14: The amplified very low frequency pulse signal is radiated through the antenna system to form a virtual space barrier.

[0021] Furthermore, in S4, the distance detection is based on an algorithm, which breaks the electromagnetic field balance in the virtual space through human disturbance and converts it into an electrical signal, and receives the electrical signal to detect the distance moved by the target object. The specific steps are:

[0022] S41: When the very low frequency virtual space electromagnetic field breaks the balance and is converted into an electrical signal, the timer is triggered to start timing;

[0023] S42: When the sensing wire receives the electrical signal, the timer is triggered to stop timing;

[0024] S43: obtaining the time difference of converting the human body movement into an electrical signal by breaking the electromagnetic field balance of the virtual space barrier through the value of the timer;

[0025] S44: Using the speed of human movement to break the electromagnetic field balance, the distance between the target and the virtual space barrier is obtained;

[0026] S45: The obtained distance is digitally transmitted to the processor.

[0027] Furthermore, the distance expression between the S44 target and the VLF virtual space barrier is:

[0028]

[0029] Where d is the target distance; Δt is the time difference between the VLF electromagnetic field pulse signal and the converted electrical signal; v is the speed of human body movement;

[0030] After introducing the factors of temperature, humidity and noise into the distance expression, the calculation formula is:

[0031]

[0032] Among them, δ n is the refractive index; v' is the moving speed after the factors are introduced;

[0033] δ n =f(T,H,N)

[0034] v′=v+Δv

[0035] Among them, Δv is the speed change after the factor is introduced; T is temperature; H is humidity; N is the noise factor.

[0036] Furthermore, the trigger condition is a safe distance. The processor compares the distance between the target transmitted by the sensor module and the very low frequency virtual space barrier with the safe distance. If it is less than the safe distance, it is determined to be abnormal; if it is greater than the safe distance, it is determined to be normal.

[0037] Further, the trigger includes an audible alarm and a flashing light;

[0038] Among them, the sound alarm is used to emit a loud sound to remind nearby people to stay away;

[0039] The flashlight is used to emit strong light and flash to warn nearby people and attract the attention of nearby workers.

[0040] Further, the communication unit includes a notification module, an information statistics module and a wireless transmission module;

[0041] Among them, the notification module is used to send alarm information in various ways;

[0042] The information statistics module is used to periodically collect statistics on alarm information and send it to the terminal;

[0043] The wireless transmission module is used to provide wireless communication between the alarm control unit and the terminal.

[0044] Further, the terminal includes a custom configuration module, a storage module and a display module;

[0045] Among them, the custom configuration module is used to modify the triggering conditions and the working mode of the sensor according to the historical alarm information of the storage module;

[0046] The storage module is used to store and query the information of the information statistics module;

[0047] The display module is used to display alarm information in real time.

[0048] Furthermore, the alarm information includes the alarm time, alarm duration, alarm mode and triggering conditions.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The present invention adopts a very low frequency induction sensor, which has the characteristics of low power consumption and can work without relying on an external power supply. It is particularly suitable for remote or unattended monitoring applications and avoids the risk of line cutting or tampering. It can quickly detect changes in the seal status and send out an alarm signal in the first time, which helps to reduce losses and improve response speed. At the same time, the very low frequency induction sensor can wirelessly communicate with the terminal, and can receive and display alarm information in real time without the need for on-site personnel to check. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a system block diagram of the present invention.

[0052] Illustration Description:

[0053] 1. Sensor module;

[0054] 2. Alarm control unit;

[0055] 21. Processor;

[0056] 22. Trigger;

[0057] 23. Communication unit;

[0058] 3. Terminal. DETAILED DESCRIPTION

[0059] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0060] Reference Figure 1 The present invention provides a judicial sealing VLF induction smart seal, comprising:

[0061] Sensor module 1, alarm control unit 2 and terminal 3, sensor module 1 is used to collect human signals and transmit the collected human signals to alarm control unit 2, and alarm control unit 2 is used to process and judge the signals and issue alarm notifications;

[0062] The alarm control unit 2 includes a processor 21, a trigger 22, and a communication unit 23;

[0063] The processor 21 is used to detect whether the transmitted signal is abnormal according to the trigger condition;

[0064] The trigger 22 receives all signals from the processor 21, and is activated and triggers an alarm when an abnormal signal is received, generating an alarm message.

[0065] The communication unit 23 is used to send the alarm information to the terminal 3, and the staff takes corresponding measures to handle it.

[0066] Further, the sensor module 1 is connected to a very low frequency induction sensor, which includes an excitation wire, a sensing wire, a target detection module and a timer. The working process is as follows:

[0067] S1: The pulse generator of sensor module 1 generates a very low frequency pulse signal of a certain amplitude to generate an electromagnetic field along the axis of the excitation wire and form a very low frequency virtual space barrier in 360 degrees;

[0068] S2: The virtual space barrier formed by the electromagnetic field. When encountering the human body, the movement of the human body breaks the balance of the very low frequency virtual space electromagnetic field;

[0069] S3: The induction wire of the very low frequency induction sensor is within the intensity range of the electromagnetic field of the excitation wire, and senses (receives) the change in the electromagnetic field intensity of the very low frequency virtual space barrier caused by human movement, and converts it into an electrical signal;

[0070] S4: The target detection module algorithm performs distance detection on the received electrical signal.

[0071] Furthermore, the specific steps of S1 are:

[0072] S11: The excitation wire is firstly generated to generate a very low frequency pulse signal;

[0073] S12: modulating the generated very low frequency name signal;

[0074] S13: amplifying the modulated very low frequency pulse signal;

[0075] S14: The amplified very low frequency pulse signal is radiated through the antenna system to form a virtual space barrier.

[0076] Furthermore, in S4, the distance detection is based on an algorithm, which breaks the electromagnetic field balance in the virtual space through human disturbance and converts it into an electrical signal, and receives the electrical signal to detect the distance moved by the target object. The specific steps are:

[0077] S41: When the very low frequency virtual space electromagnetic field breaks the balance and is converted into an electrical signal, the timer is triggered to start timing;

[0078] S42: When the sensing wire receives the electrical signal, the timer is triggered to stop timing;

[0079] S43: obtaining the time difference of converting the human body movement into an electrical signal by breaking the electromagnetic field balance of the virtual space barrier through the value of the timer;

[0080] S44: Using the speed of human movement to break the electromagnetic field balance, the distance between the target and the virtual space barrier is obtained;

[0081] S45: The obtained distance is digitally transmitted to the processor 21 .

[0082] Furthermore, the distance expression between the S44 target and the VLF virtual space barrier is:

[0083]

[0084] Where d is the target distance; Δt is the time difference between the VLF electromagnetic field pulse signal and the converted (received) electrical signal; v is the speed of human movement;

[0085] After introducing the factors of temperature, humidity and noise into the distance expression, the calculation formula is:

[0086]

[0087] Among them, δ n is the refractive index; v' is the moving speed after the factors are introduced;

[0088] δ n =f(T,H,N)

[0089] v′=v+Δv

[0090] Among them, Δv is the speed change after the factor is introduced; T is temperature; H is humidity; N is the noise factor.

[0091] Furthermore, the trigger condition is a safe distance. The processor 21 compares the distance between the target transmitted by the sensor module 1 and the very low frequency virtual space barrier with the safe distance. If it is less than the safe distance, it is determined to be abnormal; if it is greater than the safe distance, it is determined to be normal.

[0092] Further, the trigger 22 includes a sound alarm and a flashing light;

[0093] Among them, the sound alarm is used to emit a loud sound to remind nearby people to stay away;

[0094] The flashlight is used to emit strong light and flash to warn nearby people and attract the attention of nearby workers.

[0095] Further, the communication unit 23 includes a notification module, an information statistics module and a wireless transmission module;

[0096] Among them, the notification module is used to send alarm information in various ways;

[0097] The information statistics module is used to periodically collect statistics on alarm information and send it to terminal 3;

[0098] The wireless transmission module is used to provide wireless communication between the alarm control unit 2 and the terminal 3 .

[0099] Further, the terminal 3 includes a custom configuration module, a storage module and a display module;

[0100] Among them, the custom configuration module is used to modify the triggering conditions and the working mode of the sensor according to the historical alarm information of the storage module;

[0101] The storage module is used to store and query the information of the information statistics module;

[0102] The display module is used to display alarm information in real time.

[0103] Furthermore, the alarm information includes the alarm time, alarm duration, alarm mode and triggering conditions.

[0104] In this embodiment, the sensor module 1 is used to collect the signal of the conversion of the character disturbance virtual space barrier, and transmit the collected electrical signal of the conversion of the character disturbance virtual space barrier to the alarm control unit 2, and the alarm control unit 2 is used to process and judge the signal and issue an alarm notification; wherein the alarm control unit 2 includes a processor 21, a trigger 22, and a communication unit 23; the processor 21 is used to detect whether the transmitted signal is abnormal according to the trigger condition; the trigger 22 receives all the signals of the processor 21, is activated and triggers the alarm when receiving the abnormal signal, and generates the alarm information, and the communication unit 23 is used to send the alarm information to the terminal 3, and the staff takes corresponding measures to deal with it. The specific method is as follows:

[0105] The sensor module is connected to the VLF induction sensor, which is a device that uses electromagnetic fields for detection and measurement. It can generate VLF electromagnetic fields and receive them, convert them into electrical signals, and detect and track the distance moved by the target person by analyzing the characteristics of the converted electrical signals. The VLF induction sensor includes an excitation wire, an induction wire, a target detection module, and a timer. The working process is as follows:

[0106] S1: A very low frequency inductive sensor is connected to one end of an excitation wire to generate an electromagnetic field in the space around the excitation wire. Specifically, the very low frequency inductive sensor module 1 uses an oscillator to generate a very low frequency sinusoidal wave pulse signal with a frequency of 3 to 30 kHz to generate an electromagnetic field along the axis of the excitation wire; and the generated electromagnetic field is modulated to improve the transmission efficiency of the signal, reduce interference, and thus improve the communication quality; the modulated very low frequency pulse signal is power amplified to increase the energy and range of the signal, and the power amplifier can increase the power of the signal to a sufficient level to maintain the signal strength during the propagation process; the amplified very low frequency pulse signal is radiated through the antenna (excitation wire) to form a very low frequency virtual space barrier.

[0107] S2: The virtual space barrier formed by the electromagnetic field. When encountering the human body, the movement of the human body breaks the balance of the very low frequency virtual space electromagnetic field;

[0108] S3: The induction wire of the very low frequency induction sensor is within the intensity range of the electromagnetic field of the excitation wire. It senses (receives) the changes in the electromagnetic field intensity caused by human movement that destroys the very low frequency virtual space barrier, and converts it into an electrical signal. Before distance detection, the received electromagnetic field intensity changes will undergo signal processing, including amplification, filtering, compression and other operations, in order to extract the characteristic information of the target.

[0109] S4: The target detection module algorithm performs distance detection on the received electrical signal. The distance detection is based on the algorithm that converts the electric field balance destroyed by human movement (induction) into an electrical signal. The target object is detected by inducing the electrical signal converted by the virtual space barrier through the electromagnetic field generated by the very low frequency pulse signal. The specific steps are: when the person disturbs (induces) the electromagnetic field balance, the timer is triggered to start timing; when the induction wire receives the electrical signal converted by the electromagnetic field of the person disturbing the space, the timer is triggered to stop timing; the timer value is used to obtain the time difference between the person's movement speed and the breaking of the electromagnetic field balance; the propagation speed of radar waves in the air is used to obtain the distance between the target and the radar. The distance expression is:

[0110]

[0111] Among them, d is the target distance; Δt is the time difference between the moving speed and breaking the electromagnetic field balance to convert the electrical signal; v is the propagation speed of the electromagnetic field in the air;

[0112] However, when the electromagnetic field propagates in the air, it will be affected by temperature and humidity, thereby affecting the signal propagation speed and propagation path, affecting the delay time. At the same time, the signal received by the induction wire may be affected by various noise sources. These noises will interfere with the reception of the signal and may cause the intensity of the echo signal to weaken, thereby affecting the accurate measurement of the delay time.

[0113] Therefore, the factors of temperature, humidity and noise are introduced into the distance expression, and the calculation formula is:

[0114]

[0115] Among them, δ n is the refractive index; v' is the propagation speed after the factors are introduced;

[0116] δ n =fT,H,N

[0117] v′=v+Δv

[0118] Among them, Δv is the speed change after the factors are introduced; T is temperature; H is humidity; and N is the noise factor. After the temperature, humidity and noise factors are introduced, the propagation speed and distance of the radar wave in the air will change. This change is described by the refractive index of the medium. The refractive index changes with the changes in temperature, humidity and noise. Therefore, the refractive index can be expressed as a basic value plus some correction terms, which are related to temperature, humidity and noise.

[0119] S45: Transmitting the obtained distance digitally to the processor 21;

[0120] Further, the processor 21 compares the distance between the target transmitted by the sensor module 1 and the very low frequency virtual space barrier with the trigger condition, and the trigger condition is a safe distance. If it is less than the safe distance, it is determined to be abnormal, and if it is greater than the safe distance, it is determined to be normal. The trigger condition is manually set in the custom configuration module in advance. The use of the custom configuration module can modify the trigger condition and the working mode of the sensor according to the historical alarm information of the storage module. The working mode of the sensor includes the transmission power, pulse width and detection threshold of the very low frequency sensing sensor. Adjusting the transmission power can balance the detection range and energy consumption. The pulse width affects the resolution of the very low frequency virtual space barrier. A shorter pulse width can provide a higher resolution. Adjusting the detection threshold can balance the sensitivity and false alarm rate of the very low frequency sensing sensor.

[0121] When it is determined to be abnormal, the trigger 22 will be activated, and the trigger 22 will execute the sound alarm and the flash light. The sound alarm is used to emit a loud sound to remind nearby people to stay away; the flash light is used to emit strong light and flash to warn nearby people and attract the attention of nearby staff.

[0122] When an alarm is issued, the notification module sends the alarm information in multiple ways, such as SMS, email, phone or synchronous alarm; the alarm information includes the alarm time, alarm duration, alarm method and triggering conditions. At the same time, the alarm information is transmitted to the display module and the storage module through the wireless transmission module. There is also an information statistics module that can periodically count the alarm information and send it to the terminal 3, and will count the data for one day, one week and one month and send them to the terminal 3 respectively.

[0123] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A judicial sealing VLF induction smart seal, characterized in that: The invention comprises a sensor module (1), an alarm control unit (2) and a terminal (3), wherein the sensor module (1) is used to collect human signals and transmit the collected human signals to the alarm control unit (2), and the alarm control unit (2) is used to process and judge the signals and issue an alarm notification; Wherein, the alarm control unit (2) comprises a processor (21), a trigger (22), and a communication unit (23); The processor (21) is used to detect whether the transmitted signal is abnormal according to the trigger condition; The trigger (22) receives all signals from the processor (21), is activated and triggers an alarm when an abnormal signal is received, and generates alarm information. The communication unit (23) is used to send the alarm information to the terminal (3), and the staff can take corresponding measures to deal with it.

2. A judicial sealing VLF induction smart seal according to claim 1, characterized in that: The sensor module (1) is connected to a very low frequency induction sensor, which includes an excitation wire, a sensing wire, a target detection module and a timer. The working process is as follows: S1: The pulse generator of the sensor module (1) generates a very low frequency pulse signal of a certain amplitude to generate an electromagnetic field along the axis of the excitation wire and form a very low frequency virtual space barrier in 360 degrees; S2: The virtual space barrier formed by the electromagnetic field. When encountering the human body, the movement of the human body breaks the balance of the very low frequency virtual space electromagnetic field; S3: The induction wire of the very low frequency induction sensor is within the intensity range of the electromagnetic field of the excitation wire, and senses the change in the electromagnetic field intensity of the very low frequency virtual space barrier caused by human movement, and converts it into an electrical signal; S4: The target detection module converts the human body movement that destroys the electric field balance into an electric signal algorithm to perform distance detection on the received electric signal.

3. A judicial sealing VLF induction smart seal according to claim 2, characterized in that: The specific steps of S1 are: S11: the excitation wire is firstly generated to generate a very low frequency pulse signal; S12: modulating the generated very low frequency name signal; S13: amplifying the modulated very low frequency pulse signal; S14: The amplified very low frequency pulse signal is radiated through the antenna system to form a virtual space barrier.

4. A judicial sealing VLF induction smart seal according to claim 2, characterized in that: In S4, distance detection is based on an algorithm. The human body disturbance breaks the balance of the electromagnetic field in the virtual space and converts it into an electrical signal. The electrical signal is then received to detect the distance moved by the target object. The specific steps are as follows: S41: When the very low frequency virtual space electromagnetic field breaks the balance and is converted into an electrical signal, the timer is triggered to start timing; S42: When the sensing wire receives the electrical signal, the timer is triggered to stop timing; S43: obtaining the time difference of converting the human body movement into an electrical signal by breaking the electromagnetic field balance of the virtual space barrier through the value of the timer; S44: Using the speed of human movement to break the electromagnetic field balance, the distance between the target and the virtual space barrier is obtained; S45: The obtained distance is digitally transmitted to the processor (21).

5. A judicial sealing VLF induction smart seal according to claim 4, characterized in that: The distance expression between the target and the VLF virtual space barrier in S44 is: Where d is the target distance; Δt is the time difference between the VLF electromagnetic field pulse signal and the converted electrical signal; v is the speed of human body movement; After introducing the factors of temperature, humidity and noise into the distance expression, the calculation formula is: Among them, δ n is the refractive index; v' is the moving speed after the factors are introduced; δ n =f(T,H,N) v′=v+Δv Among them, Δv is the speed change after the factor is introduced; T is temperature; H is humidity; N is the noise factor.

6. A judicial sealing VLF induction smart seal according to claim 5, characterized in that: The trigger condition is the safety distance. The processor (21) compares the distance between the target transmitted by the sensor module (1) and the very low frequency virtual space barrier with the safety distance. If it is less than the safety distance, it is determined to be abnormal; if it is greater than the safety distance, it is determined to be normal.

7. A judicial sealing VLF induction smart seal according to claim 1, characterized in that: The trigger (22) includes a sound alarm and a flashing light; Among them, the sound alarm is used to emit a loud sound to remind nearby people to stay away; The flashlight is used to emit strong light and flash to warn nearby people and attract the attention of nearby workers.

8. The judicial sealing VLF induction smart seal according to claim 1, characterized in that: The communication unit (23) includes a notification module, an information statistics module and a wireless transmission module; Among them, the notification module is used to send alarm information in various ways; The information statistics module is used to periodically collect statistics on alarm information and send it to the terminal (3); The wireless transmission module is used to provide wireless communication between the alarm control unit (2) and the terminal (3).

9. A judicial sealing VLF induction smart seal according to claim 1, characterized in that: The terminal (3) includes a custom configuration module, a storage module and a display module; Among them, the custom configuration module is used to modify the triggering conditions and the working mode of the sensor according to the historical alarm information of the storage module; The storage module is used to store and query the information of the information statistics module; The display module is used to display alarm information in real time.

10. A judicial seizure VLF induction smart seal according to claim 1, characterized in that: The alarm information includes the alarm time, alarm duration, alarm method and triggering conditions.

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