CN115695695A - Firearm recording device and law enforcement recording system - Google Patents

Abstract

The application relates to a firearm recording device, which includes a gun holster, a detection mechanism and a communication mechanism. The inside of the holster is equipped with firearms, and the firearms are provided with metal parts; the detection mechanism includes a magnetic core coil assembly and an inductive metal detection sensor arranged on the holster, and the magnetic core coil assembly can interact with the metal parts in the holster Generate a magnetic field, the inductive metal detection sensor can detect the change of the magnetic field, and generate a control signal according to the change of the magnetic field; the communication mechanism communicates with the inductive metal detection sensor and the law enforcement recorder, and the communication mechanism can control the law enforcement recorder according to the control signal. By adopting the above technical solution, when the firearm equipped with metal parts is pulled out from the holster, the inductive metal detection sensor detects the change of the magnetic field in the holster, and transmits the information to the communication mechanism. The communication agency judges whether the firearm has been pulled out from the firearm, and sends a control signal to the law enforcement recorder to control the opening of the law enforcement recorder to record the law enforcement situation on the spot, thereby proving the legality of the law enforcement personnel drawing the gun.

Description

Firearms Recording Device and Law Enforcement Recording System

technical field

The application relates to the technical field of security equipment, in particular to a firearm recording device and a law enforcement recording system.

Background technique

The law enforcement recorder is a product designed and developed for the law enforcement record requirements of the law enforcement department. The law enforcement recorder can digitally record the dynamic and static scene conditions during the law enforcement process, and is used to prove the legality of the law enforcement personnel in various law enforcement processes. Regularity.

In the process of law enforcement, law enforcement officers need to be prepared to draw their guns when encountering dangerous situations. Law enforcement officers can only draw guns in emergency situations stipulated by law, and they need to prove that the situation at the scene when drawing guns is already in an emergency situation stipulated by law, so law enforcement personnel need to turn on the law enforcement body recorder to record the scene situation.

However, when the situation on the scene is already in the situation where law enforcement officers need to draw their guns to deal with it, it may be too late for the law enforcement officers to turn on the law enforcement recorder at this time, or the action of turning on the law enforcement recorder will cause the deterioration of the situation on the scene, which is not conducive to the law enforcement personnel to carry out law enforcement. .

Contents of the invention

Based on this, it is necessary to provide a firearm recording device aiming at the inconvenient use of existing law enforcement recorders in emergency situations.

A firearm recording device includes a gun holster, a detection mechanism and a communication mechanism. The inside of the holster is equipped with firearms, the firearms include metal parts, and the metal parts are arranged on the firearms; the detection mechanism is arranged on the holster, including a magnetic core coil assembly and an inductive metal detection sensor. The magnetic core coil assembly is configured to interact with the metal piece in the holster to generate a magnetic field, the inductive metal detection sensor is configured to detect changes in the magnetic field, and The change generates a control signal; the communication mechanism communicates with the inductive metal detection sensor and the law enforcement recorder, and the communication mechanism is configured to control the law enforcement recorder according to the control signal.

By adopting the above technical scheme, the firearm is assembled inside the holster, and part of the structure on the firearm is a metal part, and the magnetic core coil assembly arranged on the holster can generate an original magnetic field, and the original magnetic field acts on the metal part to generate an induced current, thereby The metal parts generate a corresponding induction magnetic field, and the induction magnetic field interferes with the original magnetic field, resulting in a change in the total magnetic field in the holster, while the inductive metal detection sensor can detect part of the change in the total magnetic field in the holster. When the firearm is pulled out of the holster, the induction magnetic field disappears, and the total magnetic field is the original magnetic field. The inductive metal detection sensor can detect the change of the total magnetic field in the holster and transmit the signal to the communication mechanism. The communication mechanism changes according to the total magnetic field Information, to determine whether the firearm is pulled out from the holster, so as to send a control signal to the law enforcement recorder, and control the law enforcement recorder to start recording law enforcement information.

In one of the embodiments, the communication mechanism includes a main control chip, and the working current of the main control chip is less than 500uA.

By adopting the above-mentioned technical solution and setting low-power chips, the power consumption of the communication mechanism and the detection mechanism is reduced, so that the firearm recording device can maintain a longer standby time, which is convenient for law enforcement personnel to carry out long-term law enforcement activities.

In one of the embodiments, the main control chip includes an encryption module configured to encrypt the control signal in a ciphertext manner.

By adopting the above technical solution, the encryption module encrypts the control signal in the form of ciphertext, and only the corresponding law enforcement recorder has the decryption key, so that devices other than the law enforcement recorder cannot interpret the received control signal ciphertext, preventing law enforcement from Disclosure of information related to law enforcement by personnel.

In one of the embodiments, the main control chip includes a feedback module configured to adjust the working current of the main control chip according to the control signal.

By adopting the above technical solution, when the firearm is in the holster, the communication mechanism does not need to send a control signal, and the feedback module controls the main control chip to be in a power-saving mode. When the firearm is pulled out from the holster, the communication mechanism is in the working mode, the working current reaches the rated value, and a control signal is sent to the law enforcement recorder, so that the main control chip optimizes the power consumption mode, further reduces power consumption, and improves standby time.

In one of the embodiments, the detection mechanism further includes a casing, and a shielding layer is provided on the surface of the casing for shielding the magnetic field interference outside the holster.

By adopting the above technical solution, the shielding layer can shield the magnetic field outside the holster, so that the inductive metal detection sensor is not disturbed by the external magnetic field, thereby reducing false alarm operations of the firearm recording device and improving the recording accuracy of the firearm recording device.

In one of the embodiments, the firearm recording device further includes a switch module disposed on the surface of the housing, and the switch module is configured to be able to directly generate the control signal.

By adopting the above technical solution, the switch module is arranged on the surface of the casing and can directly generate a control signal to turn on the law enforcement recorder. When the law enforcement officers encounter a dangerous situation and a stalemate with the criminal suspect, they can turn on the law enforcement recorder without attracting the attention of the criminal suspect, record the possible law enforcement scene in advance, and avoid the deterioration of the law enforcement scene.

In one of the embodiments, the communication mechanism is configured to record the geographic location information of the holster.

By adopting the above technical solution, when the firearm is pulled out from the holster, the communication mechanism can combine the Bluetooth IBeacon application while sending the control signal, and realize indoor precise positioning through the IBeacon base station, so that the indoor precise positioning cannot be achieved by GPS Next, the geographic location information of the firearm is recorded, so as to facilitate the confirmation of the location of law enforcement officers when they are carrying out law enforcement.

The present application also provides a law enforcement recording system, including a firearm recording device and a law enforcement recorder, and the law enforcement recorder is configured to be controlled by the control signal.

By adopting the above-mentioned technical solution, when the law enforcement recorder receives the control signal transmitted by the firearm recording device, it can automatically start to record the law enforcement scene, thereby providing evidence to prove the legal compliance of the law enforcement personnel drawing the gun.

In one of the embodiments, the law enforcement recording system includes a plurality of the firearm recording devices and a plurality of the law enforcement recorders, and any one of the firearm recording devices is communicatively connected to all the law enforcement recorders.

By adopting the above-mentioned technical solution, at the scene of law enforcement, there are usually several law enforcement officers equipped with guns to perform tasks together. When one of the law enforcement officers draws the gun, all the law enforcement recorders can receive the control signal and start recording the law enforcement scene. , to jointly prove the legal compliance of law enforcement officers drawing guns, avoid incomplete recording by a single law enforcement recorder, and improve the reliability of evidence.

In one of the embodiments, the law enforcement recording system further includes a server and a monitoring terminal, the server communicates with the law enforcement recorder and the monitoring terminal, and the server is used to receive the law enforcement information of the law enforcement recorder , and transmit the law enforcement information to the monitoring terminal.

By adopting the above technical solution, the law enforcement information recorded by the law enforcement recorder can be uploaded to the server for storage, and the monitoring terminal can retrieve the law enforcement information from the server to monitor the law enforcement scene, and take corresponding actions in time according to the situation of the law enforcement scene.

In summary, the law enforcement recording system provided by this application has at least one of the following beneficial technical effects:

1. The firearm is assembled inside the holster. Part of the structure on the firearm is a metal part, and the magnetic core coil assembly set on the holster can generate an original magnetic field. The first magnetic field acts on the metal part to generate an induced current, which causes the metal part to The corresponding induction magnetic field is generated, and the induction magnetic field interferes with the original magnetic field, resulting in the change of the total magnetic field in the holster, and the inductive metal detection sensor can detect part of the change field of the total magnetic field in the holster. When the firearm is pulled out of the holster, the induction magnetic field disappears, and the total magnetic field is the original magnetic field. The inductive metal detection sensor can detect the change of the total magnetic field in the holster and transmit the signal to the communication mechanism. The communication mechanism changes according to the total magnetic field Information, to determine whether the firearm is pulled out from the holster, so as to send a control signal to the law enforcement recorder, and control the law enforcement recorder to start recording law enforcement information.

2. The switch module is set on the surface of the holster and can directly generate a control signal to turn on the body camera. When the law enforcement officers encounter a dangerous situation and a stalemate with the criminal suspect, they can turn on the law enforcement recorder without attracting the attention of the criminal suspect, record the possible law enforcement scene in advance, and avoid the deterioration of the law enforcement scene.

3. Each firearm recording device is connected to all body-worn cameras so that when one of the law enforcement officers draws a gun, all the body-worn cameras can receive the control signal and start recording the law enforcement scene to jointly prove that the law enforcement officer draws the gun The legal compliance of a single law enforcement recorder is avoided, thereby improving the reliability of evidence.

Description of drawings

FIG. 1 is a structural schematic diagram of a first viewing angle of a firearm recording device in an embodiment of the present application;

Fig. 2 is an assembly schematic diagram of the first viewing angle of the firearm recording device and the firearm in an embodiment of the present application;

Fig. 3 is the structural block diagram of detection mechanism and communication mechanism in an embodiment of the present application;

FIG. 4 is a structural schematic diagram of a second perspective of the detection mechanism and the communication mechanism in an embodiment of the present application;

Fig. 5 is a schematic cross-sectional view of the second viewing angle of the detection mechanism and the communication mechanism in an embodiment of the present application;

FIG. 6 is a schematic diagram of a scene of a law enforcement recording system in an embodiment of the present application.

Explanation of reference signs:

10. Firearm recording device; 20. Law enforcement recorder; 30. Server; 40. Monitoring terminal; 100. Gun holster; 200. Detection mechanism; 300. Communication mechanism; 400. Firearm; 410. Metal parts; 210. Magnetic core coil assembly; 220, inductive metal detection sensor; 230, housing; 310, main control chip; 311, encryption module; 312, feedback module; 320, switch module.

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

Referring to FIG. 1 and FIG. 2, FIG. 1 shows a schematic structural view of a first viewing angle of a firearm recording device 10 in an embodiment of the present application, and FIG. 2 shows a first view of a firearm recording device and a firearm in an embodiment of the present application. Schematic view of the assembly. A firearm recording device 10 provided by an embodiment of the present application includes a holster 100 , a detection mechanism 200 and a communication mechanism 300 . A firearm 400 is assembled inside the holster 100 , and a metal piece 410 is arranged on the firearm 400 . The detection mechanism 200 is arranged on the holster 100, and includes a magnetic core coil assembly 210 and an inductive metal detection sensor 220. The magnetic core coil assembly 210 can generate an original magnetic field in the holster 100, and the magnetic field and the metal piece 410 of the firearm 400 can be Generate interaction to form an induced magnetic field. The inductive metal detection sensor 220 can detect the magnetic field change in the holster 100. When the firearm 400 is located in the holster 100, the inductive metal detection sensor 220 detects the original magnetic field and the induced magnetic field in the holster 100. When the holster 100 is pulled out, the inductive metal detection sensor 220 can only detect the original magnetic field in the holster 100 . When the inductive metal detection sensor 220 detects a change in the magnetic field, the inductive metal detection sensor 220 sends a control signal to the communication mechanism 300 . The communication mechanism 300 compiles the received control signal, and sends the control signal to the body worn camera 20 to control the body worn camera 20 to work.

An accommodating space is provided inside the holster 100 , and the accommodating space is used for assembling the firearm 400 . Specifically, the shape of the accommodating space matches the shape and size of the muzzle of the firearm 400 , so that the muzzle of the firearm 400 can be snapped into the inner wall of the accommodating space.

It should be noted that the structure of the holster 100 is not the focus of this application, and those skilled in the art can adjust the structure and size of the holster 100 adaptively according to the different firearms 400 assembled, so no comment on the structure of the holster 100 is made here. It is further limited, as long as the effect of assembling the firearm 400 can be achieved.

Please refer to FIG. 3 , which shows a structural block diagram of the detection mechanism 200 and the communication mechanism 300 in an embodiment of the present application. The magnetic core coil assembly 210 is disposed on the holster 100 for generating a magnetic field in the holster 100 . Specifically, the core-coil assembly 210 can generate an original magnetic field driven by an operating current. When the firearm 400 is in the holster 100, the metal part 410 on the firearm 400 is subjected to the effect of the original magnetic field to generate an induced eddy current, and the induced eddy current generates an induced magnetic field on the metal part 410. At this time, the total magnetic field in the holster 100 is the original magnetic field The superposition of the two parts of the magnetic field with the induced magnetic field. When the firearm 400 is not in the holster 100, the original magnetic field cannot generate an induced current to the metal piece 410, and there is no induced magnetic field. At this time, the total magnetic field in the holster 100 is the original magnetic field.

Specifically in this embodiment, the magnetic core coil assembly 210 includes a magnetic core and a FPC (Flexible Printed Circuit, flexible circuit board) coil, the FPC coil is wound on the magnetic core, and the FPC coil is fed with a working current, and the working current and the magnetic core Interactions are created to generate a stable original magnetic field.

It should be noted that the specific structure of the magnetic core coil assembly 210 can be a single-layer FPC coil, or a multi-layer FPC coil, and the connection mode of the multi-layer FPC coil can be series or parallel, or both. Combinations, those skilled in the art can choose according to actual needs, as long as the effect of generating the original magnetic field can be achieved.

The inductive metal detection sensor 220 is disposed in the holster 100 for detecting the magnetic field strength in the holster 100 . Specifically, the inductive metal detection sensor 220 is provided with a mutual induction circuit, and a corresponding induced current is generated under the electromagnetic induction of the total magnetic field in the holster 100. The total magnetic field strength in . Therefore, it is judged whether the firearm 400 is in the holster 100 according to the total magnetic field strength in the holster 100 .

Specifically in this embodiment, the inductive metal detection sensor 220 is an all-metal inductive proximity sensor, preferably an LDC1 type, to obtain higher detection accuracy. The sensing distance of the LDC1 type sensor is 6-8 mm to cover all positions of the metal part 410 in the holster 100 . The operating temperature range is -40 degrees Celsius to 85 degrees Celsius to suit various working environments. The rated working current is in the range of 1-3mA to match different working modes and reduce power consumption.

Please refer to FIG. 4 , which shows a schematic structural diagram of the detection mechanism 200 and the communication mechanism 300 in a second perspective in an embodiment of the present application. The detection mechanism 200 also includes a casing 230 , and the magnetic core coil assembly 210 and the inductive metal detection sensor 220 are disposed inside the casing 230 for protection. Specifically, the housing 230 is provided with a shielding layer, and the shielding layer is used to shield the magnetic field interference signal outside the housing 230 . Specifically in this embodiment, the inner lining of the housing 230 is provided with a magnetic ferrous material to form a shielding layer, so that the inductive metal detection sensor 220 is not disturbed by the external magnetic field, thereby reducing the false alarm operation of the firearm recording device 10 , improve the recording accuracy of the firearm recording device 10.

In some embodiments, the switch module 320 is disposed on the surface of the housing 230 , and law enforcement personnel can directly send control signals through the switch module 320 without pulling the gun out of the holster 100 or touching the switch on the body worn camera 20 .

In some law enforcement scenarios, the law enforcement personnel and the criminal suspect are confronting each other at the scene. At this time, the law enforcement personnel have already held the handle of the firearm 400 and are ready to pull out the firearm 400 to carry out law enforcement operations. Once the firearm 400 is pulled out, it may be executed immediately. In shooting operations, it is difficult for the body camera 20 to record key law enforcement footage. In order to obtain evidence proving that the law enforcement officers used the firearm 400 legally and compliantly, it is necessary to turn on the law enforcement recorder 20 in advance during the confrontation.

However, the body worn camera 20 is usually worn on the chest of a law enforcement officer, and the law enforcement officer must take one hand away from the firearm 400 and reach out to the chest to open the body worn camera 20 . When the law enforcement scene is in a confrontational situation, any action of the law enforcement personnel may cause the deterioration of the scene, causing the suspect to make an aggressive move.

Therefore, the switch module 320 is set on the holster 100, and the law enforcement personnel can open the body-worn recorder 20 without reaching out to the chest, and can open the body-worn recorder 20 through the switch module 320 on the holster 100 to record the law enforcement scene in a confrontation situation. Evidence, so as to obtain evidence of the legal compliance of drawing guns on the premise of avoiding the deterioration of the law enforcement scene.

Please refer to FIG. 3 and FIG. 5 in conjunction. FIG. 5 shows a schematic cross-sectional view of the detection mechanism and the communication mechanism in a second viewing angle in an embodiment of the present application. The communication mechanism 300 includes a main control chip 310, the main control chip 310 communicates with the inductive metal detection sensor 220 and the law enforcement recorder 20, to receive the magnetic field strength change signal transmitted by the inductive metal detection sensor 220, and judge the firearm based on the change of the magnetic field strength 400 is pulled out from the holster 100, and finally based on the judging result of the firearm 400, a signal of control opening is sent to the external body worn camera 20.

Specifically, the main control chip 310 is disposed in the casing 230 and integrated with the magnetic core coil assembly 210 and the inductive metal detection sensor 220 to reduce the occupied volume. The main control chip 310 is a miniature low-power metal trigger Bluetooth device based on the Bluetooth 5.0 specification, and transmits the control signal to the outside world in the form of Bluetooth broadcasting. information.

It can be understood that bluetooth technology is a technical carrier for transmitting control signals to the law enforcement recorder 20, and it is preferable to adopt bluetooth technology in consideration of factors such as technical maturity, cost, power consumption and transmission reliability, and those skilled in the art can According to the actual situation, technologies such as wireless local area network (Wi-Fi), infrared data transmission (IrDA) and short-distance communication (NFC) are selected to broadcast control signals.

Specifically in this embodiment, the main control chip 310 is a Bluetooth NRF52832 chip, which communicates with the LDC1 sensor chip. The NRF52832 chip is designed based on the fifth-generation Bluetooth technology standard. Compared with the previous generation of Bluetooth technology chips, it can achieve lower power consumption and multi-target transmission mode.

The main control chip 310 realizes the effect of low power consumption through the improvement of both hardware and software, so that the operating current of the main control chip 310 is less than 500uA, which can support the firearm recording device 10 to work continuously for 1 month, so that the firearm recording device 10 keeps The longer standby time is convenient for law enforcement officers to carry out long-term law enforcement activities. The hardware improvement lies in the optimized design of the radio frequency physical layer, which will not be further explained here.

The software improvement lies in the low power consumption mode of the main control chip 310 , specifically, the main control chip 310 includes a feedback module 312 , and the feedback module 312 is used to adjust the low power consumption mode and the high power consumption mode of the main control chip 310 .

When the inductive metal detection sensor 220 does not detect a change in the magnetic field strength, that is, when the firearm 400 is located in the holster 100, the feedback module 312 controls the main control chip 310 to be in a low power consumption mode, and keeps silent to the outside world or sends a signal at a very low frequency , the operating current required by the main control chip 310 at this time is relatively low, thereby reducing the power consumption of the main control chip 310 . Since the firearm 400 is located in the holster 100 most of the time, setting the main control chip 310 in this state to a low power consumption mode can greatly reduce power consumption.

In some embodiments, the feedback module 312 is also communicatively connected to the magnetic core coil assembly 210 and the inductive metal detection sensor 220 for adjusting the power consumption of the magnetic core coil assembly 210 and the inductive metal detection sensor 220 . When the magnetic field strength received by the inductive metal detection sensor 220 is too high, the magnetic field strength signal sent by the LDC1 sensor chip to the feedback module 312 is also high. The coil assembly 210 issues a control command to reduce power to adjust the working current of the magnetic core coil assembly 210 until the magnetic field intensity detected by the LDC1 sensor chip is within an appropriate range. The working current of the magnetic core coil assembly 210 and the inductive metal detection sensor 220 is adjusted through the feedback module 312 , thereby reducing the overall power consumption of the firearm recording device 10 and increasing the standby time.

The main control chip 310 realizes signal transmission to multiple targets by expanding the frequency range of the transmission signal. Specifically, at the law enforcement scene, there are usually a plurality of law enforcement officers equipped with guns to perform tasks together. When one of the law enforcement officers draws a gun, the main control chip 310 sends a control signal to all law enforcement recorders 20, turning on all law enforcement officers at the law enforcement scene. The law enforcement recorder 20 is used to record the scene of law enforcement to jointly prove the legal compliance of the law enforcement personnel drawing the gun, avoiding the incomplete recording of the single law enforcement recorder 20, thereby improving the reliability of the evidence.

The main control chip 310 also includes an encryption module 311 for encrypting control signals. Specifically, the control data is sent in AES256 ciphertext, and a shared key is established between the main control chip 310 and the body worn camera 20, and the body worn camera 20 decodes the ciphertext through the key to obtain the control signal, and based on the control The signal performs the corresponding action. Through key encryption, devices other than the law enforcement recorder 20 cannot decipher the ciphertext of the received control signal, so as to prevent law enforcement personnel from leaking information related to law enforcement.

The communication mechanism 300 on the main control chip 310 can also be used to record the geographic location information when the firearm 400 is pulled out. Specifically, in the case of outdoor law enforcement, when the firearm 400 is pulled out from the holster 100, the communication mechanism 300 sends a signal to the GPS system on the law enforcement recorder, and the GPS system is used for connection and positioning to determine the geographic location information, thereby determining The position of law enforcement officers while conducting enforcement. In the case of indoor law enforcement, the communication agency 300 can send Bluetooth signals to the indoor IBeacon base station, and perform indoor precise positioning of law enforcement personnel through the IBeacon Bluetooth base station.

The embodiment of the present application also provides a law enforcement recording system, including a firearm recording device 10 and a law enforcement recorder 20 , and the firearm recording device 10 and the law enforcement recorder 20 are connected in communication. When the firearm 400 was pulled out from the holster 100, the firearm recording device 10 sent a control signal to the law enforcement recorder 20, and the law enforcement recorder 20 turned on and recorded and photographed the law enforcement situation on the spot, so as to obtain the law enforcement scene information and prove that the law enforcement personnel pulled out Gun legal compliance.

Please refer to FIG. 6 , which shows a schematic diagram of a scene of a law enforcement recording system in an embodiment of the present application. In some embodiments, the law enforcement recording system further includes a server 30 and a monitoring terminal 40 , and the server 30 is in communication connection with the law enforcement recorder 20 and the monitoring terminal 40 . The server 30 is used to receive law enforcement information from the body worn camera 20 and transmit the law enforcement information to the monitoring terminal 40 . The law enforcement information recorded by the law enforcement recorder 20 can be uploaded to the server 30 for storage, and the monitoring terminal 40 can retrieve the law enforcement information from the server 30 to monitor the law enforcement scene, and take corresponding actions in time according to the situation of the law enforcement scene.

The working principle of the firearm recording device 10 of the present application is: when the firearm 400 is in the holster 100 , the magnetic field generated by the magnetic field generator interacts with the metal part 410 of the firearm 400 to generate an induced magnetic field, which is detected by the inductive metal detection sensor 220 . When the firearm 400 is pulled out from the holster 100, the magnetic field generator cannot continue to interact with the metal part 410 of the firearm 400, and the magnetic field changes to the original magnetic field of the inductive metal detection sensor 220 itself, and the inductive metal detection sensor 220 detects the magnetic field , and transmit the information to the communication mechanism 300 . The communication mechanism 300 judges whether the firearm 400 has been pulled out from the firearm 400 based on the change of the magnetic field, and sends a control signal to the law enforcement recorder 20 to control the law enforcement recorder 20 to turn on to record the law enforcement situation on the spot, thereby proving the legality of the law enforcement personnel to draw the firearm. Regularity.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (10)

1. A firearm recording device, comprising:

a holster (100) with a firearm (400) assembled therein, the firearm (400) comprising a metal piece (410), the metal piece (410) being disposed on the firearm (400);

a detection mechanism (200) disposed on the holster (100) and including a magnetic core-coil assembly (210) and an inductive metal detection sensor (220), the magnetic core-coil assembly (210) being configured to generate a magnetic field in the holster (100) by interaction of the metal piece (410), the inductive metal detection sensor (220) being configured to detect a change in the magnetic field and generate a control signal according to the change in the magnetic field; and

a communication mechanism (300) communicatively coupled to the inductive metal detection sensor (220) and the law enforcement recorder (20), the communication mechanism (300) configured to control the law enforcement recorder (20) in accordance with the control signal.

2. Firearm recording unit according to claim 1, characterised in that the communication means (300) comprise a master control chip (310), the operating current of the master control chip (310) being less than 500uA.

3. The firearm recording device according to claim 2, wherein the master control chip (310) comprises an encryption module (311), the encryption module (311) being configured to encrypt the control signal by means of a cipher text.

4. The firearm recording device according to claim 2, wherein the master control chip (310) comprises a feedback module (312), the feedback module (312) being configured to adjust an operating current of the master control chip (310) according to the control signal.

5. Firearm recording arrangement according to claim 2, characterised in that the communication means (300) are configured to be able to record geographic position information of the holster (100).

6. Firearm recording arrangement according to claim 1, characterised in that the detection mechanism (200) further comprises a housing (230), the surface of the housing (230) being provided with a shielding layer for shielding magnetic field disturbances outside the housing (230).

7. The firearm recording device according to claim 6, wherein the communication mechanism (300) further comprises a switch module (320) disposed on a surface of the housing (230), the switch module (320) being configured to directly generate the control signal.

8. A law enforcement recording system, comprising: firearm recording device (10) and law enforcement recorder (20) according to any of claims 1 to 7, the law enforcement recorder (20) being configured to be controlled by the control signal.

9. A law enforcement recording system according to claim 8, including a plurality of said firearm recording devices (10) and a plurality of said law enforcement recorders (20), any one of said firearm recording devices (10) being communicatively connected to all of said law enforcement recorders (20).

10. The enforcement recording system of claim 8, further comprising a server (30) and a monitoring terminal (40), wherein the server (30) is communicatively connected to the enforcement recorder (20) and the monitoring terminal (40), and wherein the server (30) is configured to receive enforcement information from the enforcement recorder (20) and transmit the enforcement information to the monitoring terminal (40).

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