Anti-sinking reinforced audio and video recording device

Abstract

The invention relates to an anti-sinking reinforced audio and video recording device, which comprises an anti-sinking floating force mechanism, a recording host, an escape adapter plate, a control box and a direction adjusting bracket, wherein the control box is used for comprehensive control and is provided with a distributed storage unit; a lifting lug is arranged at the top of the video recording host and is connected with an anti-sinking and anti-floating force mechanism; the bottom of the video recording host is connected with an escape adapter plate. The escape adapter plate comprises a positioning lug, a positioning hole and a connecting hole; the positioning lug faces outwards and is provided with a positioning hole of the through hole; a positioning rod is arranged on the direction adjusting bracket; according to the anti-sinking device, it is ensured that equipment recording data cannot sink into the seabed along with a ship, the structure is simple, setting is convenient, the anti-sinking function is stable, and the anti-sinking device is not prone to being affected by the external environment.

Description

Technical Field

[0001] The invention relates to the technical field of instrument protection, in particular to an anti-sinking reinforced audio and video recording device. Background Art

[0002] Audio and video acquisition and recording are widely used in many fields, such as driving recorders, security monitoring, cameras, black boxes, etc. When a ship sinks, the equipment installed on the ship will usually sink as well. Once the information and data stored in the equipment are lost, it will cause irreparable damage.

[0003] The Chinese invention patent with publication number CN105675046 A discloses an anti-sinking device, which is provided with a water pressure sensor for sensing water pressure value and a visibility sensor for sensing visibility value. The anti-sinking unit determines whether the anti-sinking device needs to activate the anti-sinking function according to the data sensed by the water pressure sensor and the visibility sensor, and controls the inflation of the airbag device when it is determined that the anti-sinking device needs to activate the anti-sinking function. The above scheme involves a relatively complex electrical scheme, which cannot guarantee its effective operation under harsh environmental conditions. In addition, in order to ensure stable operation, the equipment is fixed on a relatively stable platform, such as a ship hull. Once the entire ship sinks, the audio and video recording equipment will be pulled into the water together, making the anti-sinking device unable to play an effective role. Summary of the invention

[0004] The object of the present invention is to provide an anti-sinking reinforced audio and video recording device, which can effectively separate the audio and video recording device from the fixed platform and float to the water surface after the fixed platform sinks.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An anti-sinking reinforced audio and video recording device comprises an anti-sinking buoyancy mechanism and a recording host, an escape adapter plate, a control box and an azimuth adjustment bracket arranged from top to bottom; the recording host is connected to the control box through a cable; the anti-sinking buoyancy mechanism is connected to the recording host, an escape adapter plate movably connected to the azimuth adjustment bracket in a vertical direction is arranged at the bottom of the recording host, and an underwater cable cutter is also connected to the cable between the recording host and the control box;

[0007] The cable cutter comprises a water pressure sensing module and a cable cutting module. The water pressure sensing module calculates the water depth parameter where the sensor is located. When the water depth parameter exceeds a set threshold, the cable cutting module is activated to cut the cable.

[0008] In the above-mentioned anti-sinking reinforced audio and video recording device, the underwater cable cutter includes a cable fixing seat, one side of the cable fixing seat is movably connected with a cable rotating pressure plate, and the cable is placed between the cable fixing seat and the cable rotating pressure plate; an eccentric blade is arranged in the cable fixing seat, and an end cover plate is arranged at the top port of the cable fixing seat; a waterproof motor, a waterproof battery and a water pressure sensing module are connected to the bottom of the cable fixing seat in sequence; the waterproof motor, the waterproof battery and the water pressure sensing module are electrically connected; the waterproof motor includes a motor shaft and a tool seat, and the motor shaft and the tool seat are coaxially connected; the eccentric blade is provided with a through-hole blade mounting hole, and the mounting hole is arranged on one side of the center of the eccentric blade; the eccentric blade is connected to the tool seat through the blade mounting hole.

[0009] In the above-mentioned anti-sinking reinforced audio and video recording device, the underwater cable cutter also includes a safety pin; the eccentric blade is provided with a safety pin hole, and the end cover plate is provided with a through hole corresponding to the safety pin hole; the safety pin passes through the through hole of the end cover plate (9) and is inserted into the safety pin hole.

[0010] In the above-mentioned anti-sinking reinforced audio and video recording device, the upper part of the cable is limited to the cable cutting position by the cable rotating pressure plate; the lower part of the cable is tied and fixed to the outside of the housing of the waterproof motor or waterproof battery using a cable tie or tape.

[0011] In the above-mentioned anti-sinking reinforced audio and video recording device, four lifting ears on the top of the recording host are connected to the anti-sinking buoyancy mechanism; two escape adapter plates are symmetrically connected to the left and right sides of the bottom of the recording host; positioning rods are fixed at the four corners of the mounting surface on the azimuth adjustment bracket, and four positioning hole sleeves are hung on the corresponding four positioning rods.

[0012] In the above-mentioned anti-sinking reinforced audio and video recording device, the azimuth adjustment bracket is connected to the pitch adjustment bracket; the pitch adjustment bracket is connected to the height increase bracket; and the height increase bracket is installed on the carrier platform.

[0013] In the above-mentioned anti-sinking reinforced audio and video recording device, the recording host is covered with a waterproof layer, a fireproof and heat-insulating layer and an explosion-proof layer from the inside to the outside; the internal cavity of the explosion-proof layer shell is filled with buoyancy bricks.

[0014] In the above-mentioned anti-sinking reinforced audio and video recording device, the outer layer of the recording host is covered with buoyancy bricks spliced ​​with building blocks.

[0015] In the above-mentioned anti-sinking reinforced audio and video recording device, the water pressure sensing module includes a piezoresistive water pressure sensor and a control module with a single-chip microcomputer as the core. When the control module calculates that the water depth is greater than 0.5m, the control module issues a cutting command to drive the waterproof motor to rotate, drive the eccentric blade to rotate, and cut the cable.

[0016] In the above-mentioned anti-sinking reinforced audio and video recording device, the single-chip microcomputer in the control module adopts a timed wake-up detection working mode. When the calculated water depth is less than 0.2m, the single-chip microcomputer enters sleep mode. After 30s of sleep time, the water depth is re-detected. When the calculated water depth is greater than 0.2m, the single-chip microcomputer will start to continuously detect the water depth. If the detected water depth is greater than 0.5m within 1s, the single-chip microcomputer will issue a cutting command to cut the cable.

[0017] The beneficial effects of the present invention are:

[0018] 1. After the target ship sinks, the underwater cable cutter first cuts the cable, and the host camera floats by its own buoyancy bricks and anti-sinking buoyancy mechanism. The buoyancy pulls the host camera and the escape adapter plate upward to separate from the azimuth adjustment bracket. The present invention ensures that the device that records the data will not sink to the bottom of the sea with the ship, has a simple structure, is easy to set up, has a stable anti-sinking function, and is not easily affected by the external environment.

[0019] Second, the present invention uses water depth pressure as a switch signal to trigger a low-speed high-torque motor to drive an eccentric blade to complete the cutting of the cable. The cutter is generally tied to the target cable. One cutter can cut three cables at the same time. It is simple and convenient to use in special scenarios where it is necessary to break free from the cable restraints in water.

[0020] 3. The cable cutter of the present invention is based on the low-power ARM single-chip circuit design. When the single-chip timer wake-up system starts working, as long as the water depth is less than 0.2m, the single-chip will enter low-power sleep mode. Only when the single-chip continues to detect that the water depth is greater than 0.5m, the single-chip will issue a cutting command to cut the cable. Since each water depth detection only takes 100ms, and when the detected water depth is less than 0.2m, the single-chip will automatically enter a fixed-length sleep state. At this time, only the clock signal used to calculate the sleep time is still working, which greatly reduces the system power consumption and ensures its long-term underwater operation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the sinking and floating separation structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the escape adapter plate of the present invention;

[0024] Figure 4 This is a schematic diagram of the buoyancy enhancement structure of the video recording host of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the underwater cable cutter of the present invention;

[0026] Figure 6 It is a schematic diagram of the control flow of the underwater cable cutter of the present invention;

[0027] Figure 7 This is a schematic diagram of the overall installation structure of the underwater cable cutter and the cable of the present invention;

[0028] Figure 8 It is a schematic diagram of the installation structure of the eccentric blade of the underwater cable cutter of the present invention;

[0029] Fig. 9 It is a schematic diagram of the cable cutting process of the underwater cable cutter of the present invention.

[0030] In the figure: 1 - anti-sinking buoyancy mechanism; 2 - camera host; 201 - lifting ear; 202 - buoyancy brick; 203 - explosion-proof layer; 4 - control box; 3 - escape adapter plate; 301 - positioning ear; 302 - positioning hole; 303 - connection hole; 5 - azimuth adjustment bracket; 501 - positioning rod; 6 - pitch adjustment bracket; 7 - height increase bracket; 801 - cable rotation pressure plate; 802 - eccentric blade; 803 - safety pin; 804 - waterproof motor; 805 - cable fixing seat; 806 - waterproof battery; 807 - water pressure sensor module; 808 - cable; 809 - end cover. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] refer to Figures 1 to 5 The present invention relates to an anti-sinking reinforced audio and video recording device, which is mainly composed of an escape adapter plate 3, an angle adjustment mechanism, a recording host 2, a control box 4 and an anti-sinking buoyancy mechanism 1. The control box 4 includes a backup storage unit, and the recording host 2 includes a watertight movement, a fireproof insulation layer, a buoyancy brick 202 and an explosion-proof layer 203.

[0033] The mounting bracket includes an angle adjustment mechanism and a heightening bracket 7 for fixing the recording host. The angle adjustment mechanism includes an azimuth adjustment bracket 5 and a pitch adjustment bracket 6, which have azimuth and pitch adjustment functions, and can manually adjust the angle as needed to align with the recording target.

[0034] The camera host 2 includes a watertight movement, a waterproof layer, a fireproof and heat-insulating layer, and an explosion-proof outer layer 203. It is the core of the camera system and is responsible for completing high-speed audio and video acquisition, OSD character overlay, image processing, low-latency encoding, high-speed storage, and video output push. The camera module, microcomputer, environmental control system, uninterruptible mobile power system, and Beidou / GPS module are integrated into the watertight movement. The system adopts a high-speed data tight coupling design to reduce the size of the movement. At the same time, the thermal design can effectively solve the heat accumulation caused by video recording and processing, and improve the long-term working reliability of the system. And relying on its own waterproof, fireproof and explosion-proof design, it can be deployed in dangerous scenes in a cluster network. Based on the automatic perception of the external temperature, humidity, power supply conditions and other working environment and factor changes, the integrity of the audio and video data is ensured through a logical safety mechanism.

[0035] On this basis, add reliably connected buoyancy bricks to the camera host part to ensure that the buoyancy provided by the buoyancy bricks is greater than the gravity of the host part and its accessories. At the same time, the connection system needs to be disconnected from the external communication and power supply cables. The line-to-line connection can be made with a water-self-disconnecting connector, and the connection fasteners of the locking mounting bracket can be removed, or the connection fasteners of the locking mounting bracket can be replaced with water-soluble fastening ties to prevent the host part from sinking.

[0036] On both sides of the camera host 2, there is installed an escape adapter plate 3 that is only allowed to be disengaged upward. One side of the escape adapter plate 3 is tightly connected to the bottom of the explosion-proof shell of the camera host 2, and the two through holes on the other side serve as positioning holes 302 to penetrate the adjustment bracket positioning rod 501.

[0037] After the video recording host 2 is installed, the video recording host 2 cannot move in the front, back, left, right and bottom directions, and can only move upward as a whole. After entering the water, when the anti-sinking buoyancy mechanism 1 acts, the video recording host 2 can be pulled upward as a whole.

[0038] The four lifting ears 201 on the top of the audio and video camera host 2 are connected to the anti-sinking buoyancy mechanism 1, and the bottom is respectively connected to the escape adapter plates 3 on the left and right sides.

[0039] The escape adapter plate 3 is symmetrically connected to the bottom of the audio and video recording host 2, while keeping the positioning ears 301 outward, and the through-hole positioning holes 302 of the positioning ears 301 are hung on the positioning rods 501 at the four corners of the azimuth adjustment bracket 5.

[0040] The four corners of the upper mounting surface of the azimuth adjustment bracket 501 are fixedly mounted with positioning rods 501, which pass from bottom to top through the through positioning holes 302 on the positioning ears 301 of the escape adapter plate 3. The lower mounting surface of the azimuth adjustment bracket 501 is connected to the pitch adjustment bracket 6.

[0041] The upper mounting surface of the pitch adjustment bracket 6 is connected to the azimuth adjustment bracket 5 , and the lower mounting surface is connected to the equipment height increasing bracket 7 .

[0042] The equipment heightening bracket 7 is installed on the ground or on a carrier platform.

[0043] The anti-sinking design of the present invention mainly has two aspects: one is the self-buoyancy enhancement design, and the other is the external anti-sinking buoyancy mechanism 1 and the water escape design.

[0044] Buoyancy-enhanced design. The internal storage unit of the camera host 2 records valuable audio and video data and is safely protected in the IP68 movement. Once the vehicle sinks or the equipment enters the water, it will automatically stop recording and execute the safety shutdown procedure.

[0045] In order to enhance the anti-sinking capability of the system and increase the floating time after entering the water, the buoyancy bricks 202 are filled in the cavity inside the explosion-proof layer 203 shell. According to the volume measurement, it can provide about 3kg buoyancy after entering the water. Or the buoyancy bricks 202 can be covered on the outer layer of the camera host 2 by splicing with building blocks.

[0046] Anti-sinking buoyancy mechanism 1 is attached and designed for escaping in water. Four M6 stainless steel hanging ears 201 are left on the top of the camera host 2 to attach the anti-sinking buoyancy mechanism 1. The anti-sinking buoyancy mechanism 1 can be a device such as a life buoy, a floating ball, etc. that can provide a large escape buoyancy. For example, a standard marine round life buoy made of foam plastic has an outer diameter of no more than 760mm, an inner diameter of no less than 440mm, and a dead weight of no less than 2.5kg. It can support an iron block of no less than 14.5kg in fresh water for 24 hours.

[0047] When the device is completely submerged in water, the lifebuoy will tighten the steel cable connected to the M6 ​​stainless steel lifting lug 201, thereby dragging the camera host 2 together with the escape adapter plate 3 upward to complete the escape, thereby separating the camera host 2 from the azimuth adjustment bracket 5 below.

[0048] The equipment heightening bracket 7 comprises a thin rod and a square plate thereon, and is used to prevent the equipment sight line from being blocked.

[0049] Water escape design. A reliably connected buoyancy brick 202 is added to the camera host 2 to ensure that the buoyancy provided by the buoyancy brick 202 is greater than the gravity of the host and its accessories. At the same time, the communication and power supply cables connecting the camera host 2 to the outside must be connected line-to-line using water-disconnecting connectors, and the connection fasteners of the locking mounting bracket must be removed; or the connection fasteners of the locking mounting bracket must be replaced with water-soluble fastening ties that dissolve in water to prevent the host from sinking.

[0050] refer to Figures 5 to 9If there are wires connecting equipment and equipment, or equipment and carrier platforms, and if they need to be prevented from sinking, there must be a way to cut those cables. Therefore, the water-disconnecting connector can be configured as an underwater cable cutter, which includes a cable fixing seat 805, one side of which is movably connected to a cable rotating pressure plate 801, and a cable 808 is placed between the cable fixing seat 805 and the cable rotating pressure plate 801; an eccentric blade 802 is arranged in the cable fixing seat 805, and an end cover plate 809 is arranged at the top end of the cable fixing seat 805; a waterproof motor 804, a waterproof battery 806 and a water pressure sensor module 807 are connected to the bottom of the cable fixing seat 805 in sequence; the waterproof motor 804, the waterproof battery 806 and the water pressure sensor module 807 are electrically connected to each other; the waterproof motor 804 and the eccentric blade 802 are eccentrically connected; the eccentric blade 802 is also provided with a safety pin hole, and the end cover plate 809 is provided with a through hole corresponding to the safety pin hole; it also includes a safety pin 803, which passes through the through hole of the end cover plate 809 and is inserted into the safety pin hole.

[0051] The water pressure sensor module 807 is used as a switch signal to trigger the low-speed high-torque waterproof motor 804, which drives the eccentric blade 802 to complete the cutting of the cable. The cutter is generally tied to the target cable. One cutter can cut 3 cables at the same time. It is simple and convenient to use in special scenarios where it is necessary to break free from the cable in the water.

[0052] During installation, first open the cable rotating plate 801, put the device cable 808 to be cut into the opening of the cable fixing seat, press the cable rotating plate 801 and lock it with bolts. According to the needs of cable cutting, it is usually installed in a suitable position of the device cable by a hugging method. The upper part of the cable is limited to the cable cutting position by the cable rotating plate 801; the lower part of the cable is simply tied and fixed to the outside of the housing of the waterproof motor 804 or the waterproof battery using a cable tie, adhesive tape, etc.

[0053] A water pressure sensing module 807 is installed at the bottom tail. The water pressure sensing module 807 is powered by a waterproof battery 806. The water pressure sensing module 7 includes a water pressure sensor and a control module with a single-chip microcomputer as the core. Because its own (including the single-chip microcomputer) power consumption is extremely low, it can adapt to longer standby application scenarios. The water pressure sensor continuously measures the water depth data and transmits it to the single-chip microcomputer to calculate the current water depth. When the set water depth threshold is reached, the single-chip microcomputer controls the waterproof motor 804 to work, driving the eccentric blade 802 with low speed and high torque to complete the underwater cutting action. The starting cutting water depth threshold written in the single-chip microcomputer program can be adjusted to adapt to different water depth starting requirements. The maximum feed amount of the eccentric blade 802 for one rotation covers the minimum gap formed by the cable rotating plate 801 and the cable 808 fixing seat, ensuring the complete cutting of the entire cable cross section.

[0054] The water pressure sensor is a commercially available MEMS piezoresistive pressure sensor, which is a small-range, high-resolution sensor with extremely low power consumption. The sensor can be integrated with most microcontrollers, single-chip development boards, etc., and only requires simple data conversion without register modification and configuration. The structure is small and compact, and can be easily installed at the bottom of the underwater cable cutter through threads.

[0055] The end cap of the water pressure sensing module 807 can be loaded with a tool safety pin 803 to prevent misoperation. The tail end of the safety pin 803 is provided with a marking strip, and the marking strip is written with a reminder to pull out the safety pin before use.

[0056] In order to extend the working time of the underwater cable cutting module, the present invention uses a low-power ARM single-chip circuit to complete the timing wake-up of the underwater cable cutter, detect the water depth and control the tool cutting. The control flow chart is as follows: Figure 6 As shown. When the MCU timer wake-up system starts working, as long as the detected water depth is less than 0.2m, the MCU will enter low-power sleep (SLEEP) for 30s. When the calculated water depth is greater than 0.2m, the MCU will start to continuously detect the water depth; if the detected water depth is greater than 0.5m within 1s, the MCU will issue a cutting command to cut the cable.

[0057] Since it only takes 100ms to detect the water depth each time in the process, when the detected water depth is less than 0.2m (the installation position of the underwater cable cutter should be 0.2m below the bottom of the equipment), the microcontroller will automatically enter a sleep state of a fixed duration (SLEEP state, lasting 30s). At this time, only the clock signal used to calculate the sleep time is still working, which greatly reduces the system power consumption.

[0058] This working mode (RUN\SLEEP cycle) can greatly improve the system standby time while taking into account the application scenarios. Assuming that in the traditional working mode, the maximum standby time of the system in the detection working state (RUN) after power-on is 1h, after optimization using the working mode (RUN\SLEEP cycle) of timed wake-up detection, the number of (RUN\SLEEP cycles) executed per hour = 3600000ms / (30s+100ms)≈119.6 cycles, then the total time in the (RUN) working state per hour is about 11.96s, and the rest is low-power sleep state (SLEEP). In this new working mode, the standby time will mainly depend on the power consumption of the low-power sleep state (SLEEP).

[0059] Assuming that the power consumption of (SLEEP) state is about 1 / 100 of that of (RUN) state, the standby time T2 of the system in the new working mode is theoretically about 100 times the time T1 of the traditional power-on detection working state (RUN) after power-on.

[0060] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-sinking reinforced audio and video recording device, characterized in that: The invention comprises an anti-sinking buoyancy mechanism (1) and a video recording host (2), an escape adapter plate (3), a control box (4) and an azimuth adjustment bracket (5) arranged from top to bottom; the video recording host (2) is connected to the control box (4) via a cable; the anti-sinking buoyancy mechanism (1) is connected to the video recording host (2); an escape adapter plate (3) movably connected to the azimuth adjustment bracket (5) in a vertical direction is arranged at the bottom of the video recording host (2); and an underwater cable cutter is also connected to the cable between the video recording host (2) and the control box (4); The cable cutter comprises a water pressure sensing module (807) and a cable cutting module. The water pressure sensing module (807) calculates the water depth parameter of the sensor. When the water depth parameter exceeds a set threshold, the cable cutting module is activated to cut the cable.

2. The anti-sinking reinforced audio and video recording device according to claim 1, characterized in that: The underwater cable cutter comprises a cable fixing seat (805), one side of the cable fixing seat (805) is movably connected with a cable rotating pressure plate (801), and a cable (808) is placed between the cable fixing seat (805) and the cable rotating pressure plate (801); an eccentric blade (802) is arranged in the cable fixing seat (805), and an end cover plate (809) is arranged at the top end of the cable fixing seat (805); a waterproof motor (804), a waterproof battery (806) and a water pressure sensing module (807) are sequentially connected to the bottom of the cable fixing seat (805); the waterproof motor (804), the waterproof battery (806) and the water pressure sensing module (807) are electrically connected; and the waterproof motor (804) and the eccentric blade (802) are eccentrically connected.

3. The anti-sinking reinforced audio and video recording device according to claim 2, characterized in that: The underwater cable cutter also includes a safety pin (803); the eccentric blade (802) is provided with a safety pin hole, and the end cover plate (809) is also provided with a through hole corresponding to the safety pin hole; the safety pin (803) passes through the through hole of the end cover plate (809) and is inserted into the safety pin hole.

4. The anti-sinking reinforced audio and video recording device according to claim 2, characterized in that: The upper part of the cable (8) is limited to the cable cutting position by the cable rotating pressing plate (1); the lower part of the cable (8) is tied and fixed to the outside of the housing of the waterproof motor (4) or the waterproof battery (6) using a cable tie or adhesive tape.

5. The anti-sinking reinforced audio and video recording device according to claim 1, characterized in that: Four hanging ears (201) on the top of the video recording host (2) are connected to the anti-sinking buoyancy mechanism (1); two escape adapter plates (3) are symmetrically connected to the left and right sides of the bottom of the video recording host (2); positioning rods (501) are respectively fixed to the four corners of the mounting surface on the azimuth adjustment bracket (5), and the four positioning holes (302) are hung on the corresponding four positioning rods (501).

6. The anti-sinking reinforced audio and video recording device according to claim 5, characterized in that: The azimuth adjustment bracket (5) is connected to a pitch adjustment bracket (6) below; the pitch adjustment bracket (6) is connected to a height-increasing bracket (7) below; and the height-increasing bracket (7) is installed on the carrier platform.

7. The anti-sinking reinforced audio and video recording device according to claim 1, characterized in that: The recording host (2) is covered with a waterproof layer, a fireproof and heat-insulating layer and an explosion-proof layer (203) in sequence from the inside to the outside; the internal cavity of the shell of the explosion-proof layer (203) is filled with buoyancy bricks (202).

8. The anti-sinking reinforced audio and video recording device according to claim 7, characterized in that: The outer layer of the video recording host (2) is covered with buoyancy bricks (202) spliced ​​with building blocks.

9. The anti-sinking reinforced audio and video recording device according to claim 2, characterized in that: The water pressure sensing module (7) comprises a piezoresistive water pressure sensor and a control module with a single chip microcomputer as its core. When the control module calculates that the water depth is greater than 0.5 m, the control module issues a cutting instruction to drive the waterproof motor (4) to rotate, thereby driving the eccentric blade (2) to rotate and cut the cable.

10. The anti-sinking reinforced audio and video recording device according to claim 1, characterized in that: The single-chip microcomputer in the control module adopts a timed wake-up detection working mode. When the calculated water depth is less than 0.2m, the single-chip microcomputer enters sleep mode. After 30s of sleep time, the water depth is re-detected. When the calculated water depth is greater than 0.2m, the single-chip microcomputer will start to continuously detect the water depth. If the detected water depth is greater than 0.5m within 1s, the single-chip microcomputer will issue a cutting command to cut the cable.

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