Video protection recorder

Abstract

The utility model relates to the technical field of flight equipment, in particular to a video protection recorder which comprises a protection recording bag and an electric appliance box, and the protection recording bag is fixedly connected with the electric appliance box. The protection recording bag is of a multi-layer U-shaped protection structure and sequentially comprises a storage module, an isolation buffer layer, a phase change material layer, a storage module box, a heat insulation material layer and a protection shell from inside to outside. A main control board, a power supply board, a connector board, an SD card interface board and an SD card are integrated in the electric appliance box, and an external connector is arranged on the shell; the power supply board is electrically connected with the main control board, the connector board and the SD card interface board are respectively electrically connected with the power supply board, and the SD card is installed inside the electric appliance box. The video recorder solves the problems that a traditional video recording mode is insufficient in protection performance, and a traditional recorder is limited in installation and inconvenient to take and use.

Description

Technical Field

[0001] The utility model relates to the technical field of flight equipment, in particular to a video protection recorder. Background Art

[0002] With the rapid development of low-altitude flight, the surge in the number of low-altitude aircraft in the future may lead to an increase in low-altitude airspace flight accidents. Existing aircraft should at least be equipped with an airborne image recording system (AIRS) to address the risk of future low-altitude airspace flight accidents.

[0003] The commonly used video recording forms for general aviation aircraft are:

[0004] 1. Use a sports camera to record, and use a TF card as the storage medium

[0005] This solution has the following disadvantages: (1) Insufficient protection: The equipment lacks impact resistance and fireproof design, and is easily damaged in accidents, resulting in data loss. (2) Inconvenient use: The TF card needs to be manually accessed, and the cabin space of general aviation aircraft is limited, resulting in low operating efficiency.

[0006] 2. Use a dedicated flight data recorder to record, and a cache card as the storage medium

[0007] This solution has the following disadvantages: (1) Installation limitations: It is mostly installed in the equipment compartment, and the cache card requires additional cables or dedicated interfaces to access, which is inconvenient; (2) High cost: The equipment purchase and maintenance costs far exceed the general budget of general aviation companies. Utility Model Content

[0008] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a video protection recorder whose protection needs to meet the ED-155 standard and also needs to solve the problems of limited installation, inconvenient access and high cost.

[0009] The solution adopted by this utility model:

[0010] A video protection recorder includes a protection recording package and an electrical box, wherein the protection recording package and the electrical box are fixedly connected;

[0011] The protective recording package is a multi-layer U-shaped protective structure, which includes a storage module, an isolation buffer layer, a phase change material layer, a storage module box, a heat insulation material layer and a protective shell from the inside out.

[0012] The electrical box integrates a main control board, a power board, a connector board, an SD card interface board and an SD card, and an external connector is provided on the outer shell; the power board is electrically connected to the main control board, the connector board and the SD card interface board are respectively electrically connected to the power board, and the SD card is installed inside the electrical box.

[0013] Furthermore, the storage module includes a PCB board; a storage chip and a flexible printed circuit connector are welded on the PCB board; and the storage chip is reinforced with a chip reinforcement material.

[0014] Furthermore, the storage module box fixes the storage module, and the protective shell fixes the battery box.

[0015] Furthermore, the storage module in the protection record bag is electrically connected to the power board in the electrical box through an FPC connector and a flexible cable.

[0016] Furthermore, the main control board and the power board are electrically connected through a board-to-board connector; the SD card interface board and the connector board are electrically connected to the power board through pin and female connectors respectively; an SD card slot is welded on the SD card interface board, and the SD card is inserted into the SD card slot.

[0017] Furthermore, the interfaces on the main control board include Ethernet interface, TTL interface, 5V power interface, work light signal interface and SDIO interface; the interfaces on the power board include Ethernet interface, TTL interface, RS232 interface, 28V power input interface, 5V power interface, 12V power output interface and work light signal interface; the interfaces on the connector board include Ethernet interface, RS232 interface, 12V power input interface and work light interface.

[0018] Furthermore, on the housing of the electrical box, a card slot cover is provided on the outer side corresponding to the SD card slot, and a heat dissipation fin is provided below.

[0019] Furthermore, the main control board is composed of a main control circuit, a network interface circuit and a power supply circuit;

[0020] Specifically, the power input end of the main control circuit is connected to the output end of the power circuit; the RMII interface of the main control circuit is connected to the RMII interface of the network interface circuit through a high-speed signal line; the power input end of the network interface circuit is connected to the output end of the power circuit; the power circuit provides stable voltage for the main control circuit and the network interface circuit respectively.

[0021] Furthermore, the power supply board is composed of a 28V to 12V circuit, a 28V to 5V circuit, an energy storage circuit and an interface circuit;

[0022] Specifically, the power input ends of the 28V to 12V circuit and the 28V to 5V circuit respectively input 28V power; the power input end of the energy storage circuit is connected to the output end of the 28V to 12V circuit; the power input end of the interface circuit is connected to the output end of the 28V to 5V circuit, the output end of the 28V to 12V circuit and the backup power output end of the energy storage circuit.

[0023] Furthermore, the connector board is composed of filter circuits at both ends and an overvoltage protection circuit in the middle; the output end of the first filter circuit is directly connected to the input end of the overvoltage protection circuit, and the output end of the overvoltage protection circuit is directly connected to the input end of the second filter circuit, forming a series cascade structure;

[0024] The filter circuit includes a common mode filter and a π-type filter circuit composed of a capacitor and an inductor. The common mode filter is connected in series with the inductor of the π-type filter circuit and in parallel with the capacitor.

[0025] The beneficial effects of the above utility model are as follows:

[0026] (1) By fixing the electrical box and the protective recording bag and optimizing the structure to meet the requirements of SD card installation, the impact resistance and protection are enhanced, the protection requirements of airworthiness equipment are met, and the reliability of data storage in accidents is improved; the circuit board is highly integrated, the volume and weight are effectively compressed, and the problems of large volume and limited installation position of traditional flight data recorders are solved, so that the video protection recorder can realize all electrical functions under the constraints of limited volume and weight conditions, and adapt to the limited cabin space of general aviation aircraft.

[0027] (2) The video protection recorder uses a standard SD card as a data carrier, which can be quickly accessed directly in the cockpit. It is convenient for users to access without the need for a dedicated interface or cable, solving the cumbersome problem of card retrieval in traditional solutions. In addition, the cost of using a standard SD card for data unloading is extremely low, which greatly reduces the cost of data unloading and equipment operation and maintenance.

[0028] (3) The size of the video protection recorder is designed according to the thickness of the automotive standard DIN. It has good adaptability and standardized size. It can be seamlessly integrated into aircraft such as EVTOL that use automotive scale blocks. It can also be applied to a wider range of models, reducing the need for customized modifications.

[0029] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0031] Figure 1 It is a schematic structural diagram of a video protection recorder in an embodiment of the present utility model;

[0032] Figure 2 Schematic diagram of the structure of the protection record package in the embodiment of the present utility model;

[0033] Figure 3This is a schematic diagram of the internal structure of the electrical box embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the electrical box housing in an embodiment of the present utility model;

[0035] Figure 5 This is a schematic diagram of the connection method of the video protection recorder in the embodiment of the present utility model;

[0036] Figure 6 Is a block diagram of the power supply circuit in an embodiment of the utility model;

[0037] Figure 7 Is the Ethernet interface circuit in the embodiment of the utility model;

[0038] Figure 8 It is a power supply circuit in an embodiment of the present utility model;

[0039] Figure 9 Is a 28V to 12V circuit in the embodiment of the utility model;

[0040] Figure 10 Is a 28V to 5V circuit in the embodiment of the utility model;

[0041] Figure 11 Is the energy storage circuit in the embodiment of the utility model;

[0042] Figure 12 It is the first filtering circuit in the embodiment of the present utility model;

[0043] Figure 13 It is the second filtering circuit in the embodiment of the present utility model;

[0044] Figure 14 This is an overvoltage protection circuit in an embodiment of the present utility model.

[0045] Among them, 1-protection recording package, 2-electrical box, 3-storage module, 4-isolation buffer layer, 5-phase change material layer, 6-storage module box, 7-thermal insulation material layer, 8-protective shell, 9-main control board, 10-power board, 11-SD card interface board, 12-SD card, 13-connector board, 14-external connector, 15-card slot cover, 16-heat dissipation fins. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention belongs.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0048] Example 1

[0049] like Figure 1 As shown, this embodiment discloses a video protection recorder, including a protection recording package 1 and an electrical box 2, wherein the protection recording package 1 and the electrical box 2 are fixedly connected. Specifically, the protection recording package is provided with four threaded holes on the side, and the electrical box is provided with four through holes on the side, which are fixedly connected by screws.

[0050] like Figure 2 As shown, the protective recording package 1 is a multi-layer U-shaped protective structure, which comprises, from the inside to the outside, a storage module 3, an isolation buffer layer 4, a phase change material layer 5, a storage module box 6, a heat insulation material layer 7 and a protective shell 8.

[0051] Specifically, the structure of the storage module 3 includes a PCB board. The PCB board uses a multi-layer rigid board, and components such as the memory chip and the flexible printed circuit connector are soldered onto the PCB board. Through simulation optimization of the storage module, the possibility of damage to the memory chip is reduced. The memory chip is reinforced with chip reinforcement material.

[0052] In this embodiment, the memory chip uses an EMMC chip, which has a large storage capacity, high read and write speed, and can withstand long-term baking at 260°C. Chip reinforcement materials can be selected from, but are not limited to, epoxy resins and UV glue. Strengthening methods can be selected from, but are not limited to, underfill and chip covering: The memory chip soldered to the PCB board uses chip reinforcement materials such as epoxy resins and UV glue to fill the gap between the chip bottom and the PCB, or the chip is completely covered on the PCB board to reinforce the chip on the PCB board, to prevent the memory chip from peeling off from the PCB or localized fracture under strong impact conditions.

[0053] The protection record package 1 achieves comprehensive protection for the storage module 3 by applying a variety of materials, specifically:

[0054] The structure of the isolation buffer layer 4 is encapsulated and molded by one or more encapsulating materials to achieve physical isolation between the storage module 3 and the outside and provide impact buffering. In this embodiment, the encapsulating material can be selected from but not limited to silicone encapsulating glue, polyurethane encapsulating glue, and epoxy resin encapsulating glue.

[0055] Phase change material layer 5 is encapsulated and molded from a phase change material, providing high-temperature protection for the storage module through latent heat storage and phase change heat dissipation. In this embodiment, the phase change material primarily comprises a combination of paraffin wax and various salt hydrates. It has a high enthalpy and features a first phase transition point and a second phase transition point, maintaining the temperature of the storage module 3 within a stable range before the phase transition is complete.

[0056] By selecting and verifying the performance of various materials, the isolation buffer layer 4 and the phase change material layer 5 are in long-term contact, and can still maintain good organizational properties under the condition of 10 hours of contact at 260°C.

[0057] The storage module case 6 uses its internal cavity as a potting container to pot and secure the storage module 3, while also providing impact protection. Specifically, in this embodiment, the storage module case 6 is constructed from 2A12 aluminum alloy, which boasts a tensile strength exceeding 410 MPa, a yield strength of approximately 325 MPa, and a hardness of approximately 120 HB, providing excellent performance under high loads and impacts.

[0058] The insulation layer 7 is formed from a compacted thermal insulation material. Its structure meets the requirements for installation within the protective housing 8 and the storage module box 6, providing high-temperature protection for the protective recording package 1 through its low thermal conductivity. In this embodiment, the insulation material is a nanoporous thermal insulation material with a thermal conductivity between 0.022 W / mK and 0.036 W / mK. The nanosilica aerogel is the primary material, exhibiting excellent thermal insulation properties and sufficient structural strength.

[0059] The protective housing 8 is structurally resistant to penetration, extrusion, and impact damage, and provides reliable anchoring and connection to the electrical box 2. Protective housing 8 is constructed from 30CrMnSiA alloy structural steel, which has been conditioned to achieve a tensile strength exceeding 1150 MPa, an impact energy of approximately 39 J, and a hardness of HRC 40-50, exhibiting excellent overall mechanical and machinability. While meeting ED-155 protection requirements, the housing optimizes structural dimensions and material thickness, effectively limiting the overall size and weight of the video recorder to accommodate installation requirements on various low-altitude aircraft.

[0060] like Figure 3 As shown, the electrical box 2 integrates a main control board 9, a power board 10, a connector board 13, an SD card interface board 11 and an SD card 12; the power board 10 and the SD card interface board 11 are electrically connected to the main control board 9 respectively, the connector board 13 is electrically connected to the power board 10, and the SD card 12 is installed inside the electrical box 2.

[0061] The electrical connections between circuit boards are as follows:

[0062] The main control board 9 and power board 10 are electrically connected via a board-to-board connector with a rated current of 0.3A and a rated voltage of 30V, offering high density and reliable connection. The storage module 3 within the protective recording package 1 is electrically connected to the power board 10 within the electrical box 2 via an FPC connector and flexible cable. The SD card interface board 11 and connector board 13 are electrically connected to the power board 10 via pin headers and female headers, respectively. The storage module 3, SD card interface board 11, and connector board 13 are all indirectly electrically connected to the main control board 9 through their electrical connection to the power board 10. An SD card slot is soldered onto the SD card interface board, and an SD card is inserted into the slot for reading.

[0063] like Figure 4 As shown, an external connector 14 is provided on the outer shell of the electrical box 2, a card slot cover 15 is provided on the outer side corresponding to the SD card slot, and a heat dissipation fin 16 is provided at the bottom.

[0064] Specifically, the external connector 14 is welded to the connector plate 13 , and the external connector 14 is electrically connected to the power board 10 through the connector plate 13 .

[0065] In this embodiment, the external connector 14 uses a DB26 straight female socket with a welding plate and a positioning column to realize the external connection of the video protection recorder. The corresponding wire gauge is 20AWG, the rated current is 5A, the rated voltage is 40V, and the applicable temperature is -55℃~105℃. It is easy to use, cost-effective, and has good environmental adaptability.

[0066] The SD card is used as a means of quickly offloading video data, making it easy for users to access it. Because the opening for the SD card significantly affects the environmental adaptability of the video protection recorder, a card slot cover 15 is provided on the electrical box 2 to improve its environmental adaptability. The internal structure of the electrical box 2 includes a metal partition between the main control board 9 and the power board 10. A thermally conductive silicone sheet is installed at this location to increase the contact area between the main control board 9, the power board 10, and the electrical box 2. Heat dissipation fins 16 are also provided on the outside of the electrical box 2 to increase the surface area and improve heat dissipation capacity, thereby reducing the operating temperature of components within the limited volume of the electrical box 2.

[0067] The following Tables 1 to 4 are used to confirm the number of pins and electrical performance during the connector selection process for each circuit board.

[0068] Table 1 Main control board interface

[0069]

[0070] Table 2 Storage module interface

[0071]

[0072] Table 3 SD card interface board interface

[0073]

[0074] Table 4 External connector interface

[0075]

[0076] Among them, such as Figure 5 As shown, the interfaces on the main control board include Ethernet interface, TTL interface, 5V power interface, work light signal interface and SDIO interface; the interfaces on the power board include Ethernet interface, TTL interface, RS232 interface, 28V power input interface, 5V power interface, 12V power output interface and work light signal interface; the interfaces on the connector board include Ethernet interface, RS232 interface, 12V power interface and work light interface.

[0077] As a further embodiment, the main control board 9 is composed of a main control circuit, a network interface circuit, and a power supply circuit. The main control circuit is used for logical control of the video protection recorder. Its power input is connected to the output of the power circuit. Its RMII interface is connected to the RMII interface of the network interface circuit via a high-speed signal line to achieve data transmission. The network interface circuit is used to achieve communication between the main control board and the outside world, capable of transmitting external data to the main control circuit for processing and also sending data from the main control circuit to an external network, achieving bidirectional data transmission. Its power input is connected to the output of the power circuit. The power supply circuit provides stable voltages for the main control circuit and the network interface circuit.

[0078] The following are the principles and specific implementations of each circuit on the main control board:

[0079] The main control circuit includes a main control chip, memory, a configuration chip, and a crystal oscillator. The main control chip is connected to the memory via a data bus, an address bus, and a control bus, and to the configuration chip via data lines, address lines, and control signal lines. Its clock input pin is connected to the output of the crystal oscillator. In this embodiment, the main control chip uses a dual-core ARM + FPGA SoC; the memory uses a DDR3 chip; the configuration chip uses a Nor Flash chip to store program configuration data; and two passive crystal oscillators, 100MHz and 25MHz, are used. After the power supply circuit provides stable power to the main control circuit, the main control circuit loads the program in Nor Flash and begins operation. The main control circuit then exchanges data with the network interface circuit to achieve network communication.

[0080] Specifically, the main control circuit uses the XC7Z020 chip U1 and configuration devices as the control core, and is matched with a DDR3 chip U3 and configuration devices, a reset chip U2 and configuration devices, and a Flash chip U5 and configuration devices to form a minimum system to realize the logic control of the video protection recorder.

[0081] The network interface circuit uses two YT8521 network PHY chips, along with peripheral circuitry, to implement dual-channel Ethernet communication. After the power supply circuit provides stable power to the network interface circuit, the network interface circuit connects to the main control circuit via the RMII interface, enabling data exchange with the main control circuit and external data exchange via a 100M network interface. In this embodiment, the network interface circuit is an Ethernet interface circuit.

[0082] Specifically, such as Figure 7 As shown, the network PHY chip U11 and peripheral devices constitute the network physical layer, perform network signal level conversion, and realize network data output and reception.

[0083] The power supply circuit performs DC-DC conversion on the 5V input power supply, and the output end provides a reliable DC regulated power supply for the main control circuit and the network interface circuit. The circuit uses the 3059 chip, which supports 4 outputs with a total output power of no more than 10W. Each output can be configured to meet the power supply timing requirements. Figure 6 As shown, the power supply circuit can convert 5V power supply to 1.1V, 1.35V, 3.3V, and 1.8V to power other chips.

[0084] Specifically, such as Figure 8 As shown, the 11, 8, 23, 20, and 3 pins of the DC / DC chip U7 input +5V power supply, and the parallel capacitors C99-C106, C110, and C111 are used to suppress power supply fluctuations.

[0085] Pin 12 of U7 is connected in series with inductor L1 and in parallel with capacitors C97 and C96 to ground, forming an L-type filter circuit for filtering out noise and interference signals in the circuit. The output 1.1V power supply is connected in parallel with resistor R37 and capacitor C98 for power supply voltage division and power supply fluctuation suppression. It is connected to pin 14 of U7 for setting the output voltage, and is connected in series with resistor R38 for voltage division to ground.

[0086] Pin 7 of U7 is connected in series with inductor L2 and in parallel with capacitors C107 and 108 to ground, forming an L-type filter circuit for filtering out noise and interference signals in the circuit. The output 1.35V power supply is connected in parallel with resistor R39 and capacitor C109 for power supply voltage division and power supply fluctuation suppression. It is connected to pin 5 of U7 for setting the output voltage, and is connected in series with resistor R40 for voltage division to ground.

[0087] Pin 24 of U7 is connected in series with inductor L3 and in parallel with capacitors C114 and C112 to ground, forming an L-type filter circuit for filtering out noise and interference signals in the circuit. The output 3.3V power supply is connected in parallel with resistor R41 and capacitor C113 for power supply voltage division and power supply fluctuation suppression. Pin 2 connected to U7 is used to set the output voltage, and the series resistor R43 is used to divide the voltage to ground.

[0088] Pin 19 of U7 is connected in series with inductor L4 and in parallel with capacitors C117 and C119 to ground, forming an L-type filter circuit for filtering out noise and interference signals in the circuit. The output 1.8V power supply is connected in parallel with resistor R46 and capacitor C118 for power supply voltage division and power supply fluctuation suppression. It is connected to pin 17 of U7 for setting the output voltage, and the series resistor R47 is used to divide the voltage to ground.

[0089] Capacitors C125 and C128 are connected in parallel to pins 4 and 1 of U9 for suppressing power supply fluctuations. Inductor L6 is connected in series to pin 3 of U9, and capacitor C127 is connected in parallel to form an L-type filter circuit for filtering out noise and interference signals in the circuit. Resistor R50 and capacitor C126 are connected in parallel to output 3.3V_NET power supply for power supply voltage division and power supply fluctuation suppression. Pin 5 of U9 is used to set the output voltage, and resistor R51 is connected in series to divide the voltage to the ground.

[0090] As a further embodiment, the power board 10 comprises a 28V to 12V converter circuit, a 28V to 5V converter circuit, a tank circuit, and an interface circuit. The power input terminals of the 28V to 12V converter circuit and the 28V to 5V converter circuit each receive a 28V power supply; the tank circuit power input terminal is connected to the 28V to 12V converter circuit output terminal; and the interface circuit power input terminal is connected to the 28V to 5V converter circuit output terminal, the 28V to 12V converter circuit output terminal, and the tank circuit backup power output terminal.

[0091] The following are the principles and specific implementations of each circuit on the power board:

[0092] In the 28V to 12V circuit, a DC-DC power chip performs 28V to 12V power conversion. The 12V power supply is used to power the camera and energy storage capacitor (the camera is an external device, powered by a cable connected to the protective video recorder's external connector; the energy storage capacitor is soldered to the power board). In this embodiment, this circuit uses the LMR50410XDBVR chip to build the peripheral circuit components. This chip has a small package, a wide input voltage range of 4V-36V, an adjustable output voltage, and can provide 1A of continuous current.

[0093] Specifically, such as Figure 9 As shown, in the 28V to 12V circuit, the 28V_1 power supply is connected in parallel with C1, C33, and C22 to suppress power fluctuations. It is connected to pins 5 and 4 of the DC / DC power supply chip U3 for power input and input start signal. Pin 2 is grounded. Pin 1 is connected in series with capacitor C32 to pin 6 to start the power output. Pin 6 is connected in series with inductor L3. Parallel capacitors C43 and C34 form an L-type filter circuit to filter out noise and interference signals in the circuit. The output 12V power supply is connected in parallel with resistor R22, which is connected to pin 3 of U3 for setting the output voltage. The series resistor R23 is used to divide the voltage to ground.

[0094] In the 28V to 5V circuit, a DC / DC power supply chip performs 28V to 5V power conversion. The 5V power supply is used to provide power to the main control board via a board-to-board connector, generating the various voltages required by the main control. In this embodiment, this circuit uses the TPS54340BDDAR chip to build the peripheral circuit components. This chip has a small package, a wide input voltage range of 4.5V-42V, an adjustable output voltage, and can provide 3.5A of continuous current.

[0095] Specifically, such as Figure 10 As shown in the 28V to 5V circuit, the 28Vin power supply is connected in parallel with C14, C16, C17, and C12 to suppress power fluctuations. It is connected to pin 2 of the DC / DC power supply chip U2 for power input. Resistor R15 is connected in parallel to pin 3 of U2 to set the output voltage, and resistor R17 is connected in series to ground for voltage division. Pin 4 of U2 is connected in series with R19 to ground to set the output power frequency. Pin 1 of U2 is connected in series with capacitor C2 to pin 8, and diode D1 is connected in parallel to ground to configure the power output. Pin 6 of U2 is connected in parallel with C13, R20 and C23 to form a frequency compensation circuit. The 5V power supply is connected in parallel with resistor R16 to pin 5 of U2 to set the output voltage, and resistor R18 is connected in series to ground for voltage division. The 5V output is connected in parallel with C7, C9, C10, and C25 to suppress power fluctuations.

[0096] The energy storage circuit provides power to the device after a power outage, allowing for delayed recording. This allows the device to remain operational for a period of time, continuously receiving and recording camera video data. The energy storage circuit uses supercapacitors as the energy storage medium to maintain this operational state. Two supercapacitors are connected in series and charged with 12V. The circuit features a single-phase conduction mechanism to prevent power backflow.

[0097] Specifically, such as Figure 11 As shown, in the energy storage circuit, the circuit is connected to a +12V power supply, connected to a diode D5 in series with a resistor R33 for input current limitation, a diode D4 in series for discharge output, a resistor R33 in series with a resistor R34, and resistors R34 and R9 are connected in parallel with supercapacitors E1 and E2, respectively, for equalizing the capacitor charging voltage.

[0098] Interface circuits primarily include RS232 and Ethernet interfaces. The RMII signals output by the main control board 9 are transmitted to the interface circuits, which then generate network data and output it via a network transformer. For example, the RS232 interface circuit uses the SP3232EEA as an RS232 module, combined with peripheral components to implement dual-channel RS232 communication.

[0099] Specifically, in the RS232 interface circuit, the network port transformer T2 is used to isolate the network signal and output it. The U1 chip and configuration device provide two TTL to 232 outputs. This part of the utility model adopts a standard configuration circuit, and the connection method is not described in detail.

[0100] As a further embodiment, the connector board 13 filters and protects the input power supply against overvoltage, including filter circuits at both ends and an overvoltage protection circuit in the middle. The output of the first filter circuit is directly connected to the input of the overvoltage protection circuit, and the output of the overvoltage protection circuit is directly connected to the input of the second filter circuit, forming a series cascade structure.

[0101] The following are the circuit principles and specific implementation methods of each circuit on the connector board:

[0102] The filtering circuit includes a common-mode filter and a π-type filter circuit composed of a capacitor and an inductor. The common-mode filter is connected in series with the inductor of the π-type filter circuit and in parallel with the capacitor to suppress interference in the input power supply and interference generated by the equipment.

[0103] Specifically, such as Figure 12 As shown, the 28V power supply is connected in series with a resettable fuse F1 and in parallel with a 75V transient suppression diode D2 for anti-static protection. In the first filter circuit, the 28V power supply is connected in parallel with Y capacitors C6 and C9 to ground, which can discharge high-order harmonics to ground, reducing radiated interference and suppressing common-mode interference. The 28V power supply is connected in series with a common-mode filter L1 to suppress common-mode interference. Parallel capacitors C4 and C3 are connected to the power supply ground, and a ferrite bead FB1 is connected in series. Parallel connections of C12 and C5 to the power supply ground form a π-type filter to filter out noise and interference signals in the circuit.

[0104] Specifically, such as Figure 13 As shown, in the second filter circuit, a series diode D1 isolates the front and rear power supplies, capacitors C7 and C8 are connected in parallel to the power ground, and an inductor L2 is connected in series with C10 and C11 in parallel to the power ground, forming a π-type filter to filter out noise and interference signals in the circuit. Additionally, a series diode D5 isolates the front and rear power supplies, capacitor C16 is connected in parallel to the power ground, and an inductor L3 is connected in series with C17 in parallel to the power ground, forming a π-type filter to filter out noise and interference signals in the circuit.

[0105] The overvoltage protection circuit includes a voltage monitor chip, transistors, field-effect transistors and peripheral components. The overvoltage is designed to be 36V. When it exceeds 36V, the input power channel will be shut down to protect the power supply equipment.

[0106] Specifically, such as Figure 14As shown, a voltage monitoring module, composed of a voltage monitoring chip U1 and peripheral components, implements 36V overvoltage protection and 12V power-off signal generation. Voltage monitoring chip U1 monitors the input voltage in real time, with pins IN1 and IN2 used to input the monitored voltage signal. A peripheral resistor divider network (such as R2, R3, R8, and R7) divides the monitored higher voltage into a certain proportion and inputs these two pins, allowing the chip to monitor the voltage. When the voltage exceeds the preset overvoltage threshold, a signal is output through pins OUT1 and OUT2 to trigger protection. Pin OUT1 is connected to the base of transistor Q1 via resistor R4, receiving the control signal from the voltage monitoring chip. Pin OUT2 is connected to the gate of field-effect transistor PMOS1 via resistor R5. When the transistor is conducting, it pulls down the voltage on the gate of the field-effect transistor, turning it off.

[0107] A power-off signal and an input power detection signal are provided, and different AD power supply values are collected under different input voltage main controls. For example: when the input voltage is 36V, the power-off signal is 3.3V, and the AD collection voltage is 1V; when the input voltage is 28V, the power-off signal is 2.55V, and the AD collection voltage is 0.76V; when the input voltage is 12V, the power-off signal is 1.09V, and the AD collection voltage is 0.33V.

[0108] In this embodiment, the specific working mode of the video protection recorder is as follows:

[0109] 1. Data recording: The recorder receives the video stream of the external camera through Ethernet. The data recording is collaboratively processed by the dual-core design of the main control board. CPU0 implements the RTSP protocol through 100M Ethernet to complete the interaction with the external camera, receive the image data and write it to the DDR memory, and notify CPU1 to take the data away by setting the CPU1 interrupt; after receiving the interrupt set by CPU0, CPU1 reads the data from the DDR memory and writes it to the SD card and EMMC, that is, it is synchronously stored in the EMMC in the protection record package and the SD card of the electrical box, triggering the CPU0 interrupt.

[0110] 2. Data Unloading:

[0111] Supports Ethernet remote transmission or physical insertion and removal of SD cards.

[0112] During Ethernet remote unloading, CPU1 implements TCP communication function through Gigabit Ethernet and interacts with the data unloading software. When receiving the data unloading instruction, CPU1 reads the data from EMMC and sends it to the data unloading software.

[0113] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A video protection recorder, characterized in that: It includes a protective recording bag and an electrical box, and the protective recording bag and the electrical box are fixedly connected; The protective recording package is a multi-layer U-shaped protective structure, which includes a storage module, an isolation buffer layer, a phase change material layer, a storage module box, a heat insulation material layer and a protective shell from the inside out. The electrical box integrates a main control board, a power board, a connector board, an SD card interface board and an SD card, and an external connector is provided on the outer shell; the power board is electrically connected to the main control board, the connector board and the SD card interface board are respectively electrically connected to the power board, and the SD card is installed inside the electrical box.

2. A video protection recorder as claimed in claim 1, characterized in that: The storage module includes a PCB board; a storage chip and a flexible printed circuit connector are welded on the PCB board; and the storage chip is reinforced with a chip reinforcement material.

3. A video protection recorder as claimed in claim 1, characterized in that: The storage module box fixes the storage module, and the protective shell fixes the battery box.

4. A video protection recorder as claimed in claim 1, characterized in that: The storage module in the protection record bag is electrically connected to the power board in the electrical box through an FPC connector and a flexible cable.

5. A video protection recorder as claimed in claim 1, characterized in that: The main control board and the power board are electrically connected through a board-to-board connector; the SD card interface board and the connector board are electrically connected to the power board through pin and female connectors respectively; an SD card slot is welded on the SD card interface board, and the SD card is inserted into the SD card slot.

6. A video protection recorder as claimed in claim 1, characterized in that: The interfaces on the main control board include Ethernet interface, TTL interface, 5V power interface, work light signal interface and SDIO interface; the interfaces on the power board include Ethernet interface, TTL interface, RS232 interface, 28V power input interface, 5V power interface, 12V power output interface and work light signal interface; the interfaces on the connector board include Ethernet interface, RS232 interface, 12V power input interface and work light interface.

7. A video protection recorder as claimed in claim 5, characterized in that: On the outer shell of the electrical box, a card slot cover is provided on the outer side corresponding to the SD card slot, and a heat dissipation fin is provided at the lower side.

8. A video protection recorder as claimed in claim 1, characterized in that: The main control board is composed of a main control circuit, a network interface circuit and a power supply circuit; Specifically, the power input end of the main control circuit is connected to the output end of the power circuit; the RMII interface of the main control circuit is connected to the RMII interface of the network interface circuit through a high-speed signal line; the power input end of the network interface circuit is connected to the output end of the power circuit; the power circuit provides stable voltage for the main control circuit and the network interface circuit respectively.

9. A video protection recorder as claimed in claim 1, characterized in that: The power supply board consists of a 28V to 12V circuit, a 28V to 5V circuit, an energy storage circuit and an interface circuit; Specifically, the power input ends of the 28V to 12V circuit and the 28V to 5V circuit respectively input 28V power; the power input end of the energy storage circuit is connected to the output end of the 28V to 12V circuit; the power input end of the interface circuit is connected to the output end of the 28V to 5V circuit, the output end of the 28V to 12V circuit and the backup power output end of the energy storage circuit.

10. The video protection recorder according to claim 1, characterized in that: The connector board consists of filter circuits at both ends and an overvoltage protection circuit in the middle; the output end of the first filter circuit is directly connected to the input end of the overvoltage protection circuit, and the output end of the overvoltage protection circuit is directly connected to the input end of the second filter circuit, forming a series cascade structure; The filter circuit includes a common mode filter and a π-type filter circuit composed of a capacitor and an inductor. The common mode filter is connected in series with the inductor of the π-type filter circuit and in parallel with the capacitor.

Images