A video signal circuit for monitoring vehicle status

Abstract

This utility model discloses a video signal circuit for monitoring vehicle status, relating to the field of video signal processing. It includes an image sensor, an image processor, a software storage module, a power supply circuit, a video output circuit, a vehicle status monitoring module, and auxiliary circuits. The image sensor and image processor are connected via pins to achieve image information transmission and processing. The vehicle status monitoring module includes a gyroscope circuit and a gyroscope information processing circuit, which can collect vehicle motion data and transmit it to the image processor. The power supply circuit provides multiple stable voltage levels, and the auxiliary circuit ensures voltage stability and interface expansion. This circuit forms a standardized hardware platform, allowing technicians to directly power on and debug the software, reducing hardware development costs, improving efficiency, and is suitable for various scenarios such as the integration of vehicle video surveillance and vehicle status monitoring.

Description

Technical Field

[0001] This utility model relates to the field of video signal processing, and in particular to a video signal circuit for monitoring vehicle status. Background Technology

[0002] In the current field of automotive electronics, the demand for the integration of driving status monitoring and video surveillance is becoming increasingly prominent. Traditional automotive video circuits often only achieve single image acquisition and output functions. To simultaneously acquire the vehicle's motion status, additional independent sensing and processing circuits need to be built, resulting in problems such as low system integration, poor hardware compatibility, and complex wiring.

[0003] Meanwhile, in existing solutions, power supply compatibility and signal interface protocols among modules often exhibit incompatibility. Technical personnel must spend significant time resolving hardware compatibility issues during development and debugging, including power stability testing and signal transmission interference troubleshooting, severely impacting development efficiency. Furthermore, the lack of a unified hardware platform architecture in most circuits results in a lack of standardized hardware for software debugging, leading to significant differences in debugging environments among different developers and increasing the difficulty of collaborative development. Utility Model Content

[0004] The technical problem this utility model aims to solve is that there is currently no suitable hardware circuit for writing video signal programs for vehicle status monitoring, and there is a lack of hardware support for converting vehicle driving status into electrical signals. Purchasing corresponding hardware circuits on the market is costly, difficult to maintain and modify, and suffers from poor hardware compatibility. The beneficial effect of this application is to propose a cost-effective and easy-to-maintain hardware circuit that can collect vehicle status data. This application merely provides a low-cost hardware circuit that can be programmed; it pertains to the construction and optimization of a hardware platform and does not involve any control methods.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A video signal circuit for monitoring vehicle status, the key features of which include an image sensor, an image processor, a software storage module, a power supply circuit, a video output circuit, a vehicle status monitoring module, and auxiliary circuits;

[0007] The auxiliary circuit includes a voltage monitoring circuit, a first interface circuit, and a second interface circuit.

[0008] The vehicle status monitoring module includes a gyroscope circuit and a gyroscope information processing circuit;

[0009] After acquiring external image information, the image processor transmits it to the image processor. The image processor, as the processing core, processes the image information and then outputs the image through the video output circuit.

[0010] The voltage monitoring circuit, the first interface circuit, the second interface circuit, the vehicle status monitoring module, and the software storage module are respectively connected to the image processor; the power supply circuit provides power to the circuit.

[0011] The gyroscope circuit is connected to the gyroscope information processing circuit.

[0012] Preferably, the image sensor U5 uses an SC1346 chip. The EXTCLK, XCHUTDN, SCL, and SDA pins of U5 are connected to the image processor U1; the DVDD pin of U5 is connected to a 1.5V power supply; the DOVDD pin of U5 is connected to a 1.8V power supply; the AVDD pin of U5 is connected to a 2.8V power supply; the VREF1 and VREFN pins of U5 are grounded through a capacitor; the PWDNB pin of U5 is connected to a 1.8V power supply; the MCN, MCP, MDN, and MDP pins of U5 are connected to the image processor U1; and the ground pin of U5 is grounded.

[0013] Preferably, the image processor U1 uses an XC5323A chip;

[0014] The CVDD pin of U1 is connected to a 1.2V power supply; the AVDDMTX pin of U1 is connected to a 1.8V power supply; the VDDIO2 pin of U1 is connected to a 3.3V power supply; the AVDDMRX pin of U1 is connected to a 1.8V power supply; the VDDIO1 pin of U1 is connected to a 1.8V power supply; the ADC_COMP pin of U1 is connected to a 3.3V power supply; the DAC_CVDD pin of U1 is connected to a 1.2V power supply; and the AVDDDAC pin is connected to a 3.3V voltage.

[0015] The MRXCN pin of U1 is connected to the MCN pin of U5, the MRXCP pin is connected to the MCP pin of U5, the MRXDN0 pin is connected to the MDN pin of U5, and the MRXDP0 pin is connected to the MDP pin of U5; the CCLK pin of U1 is connected to the EXTCLK pin of U5, and the SNR_RST pin is connected to the XCHUTDN pin of U5; the I2C0_SCK pin of U1 is connected to a 1.8V power supply via a pull-up resistor and is also connected to the SCL pin of U5; the I2C0_SDA pin of U1 is connected to a 1.8V power supply via a pull-up resistor and is also connected to the SDA pin of U5.

[0016] The SETTING_SEL1 and GPIO11 pins of U1 are connected to the first interface circuit; the GPIO23 pin of U1 is grounded; XO and XI of U1 are respectively connected to the two ends of the crystal oscillator X1; the RESETB pin of U1 is connected to the voltage monitoring circuit; the SPI_CSN, SPI_SCK, SPI_MOSI, and SPI_MISO pins of U1 are connected to the software storage module; the UART_TX and UART_RX pins of U1 are respectively connected to the external interfaces TP4 and TP5 and the gyroscope information processing circuit.

[0017] The DAC_OUT pin of U1 is connected to the video output module; the DAC_COMP pin of U1 is connected to a 3.3V power supply through capacitor C4; and the DAC_REXT pin of U1 is grounded.

[0018] Preferably, the software storage module includes U3, and U3 uses an M25P80 chip;

[0019] The CS pin of U3 is connected to the SPI_CSN pin of U1, the SCK pin of U3 is connected to the SPI_SCK pin of U1, the SI pin of U3 is connected to the SPI_MOSI pin of U1, and the SO pin of U3 is connected to the SPI_MISO pin of U1. The VCC, HOLD and WP pins of U3 are connected to a 3.3V power supply after being connected in parallel with a filter capacitor.

[0020] Preferably, the power supply circuit includes a 2.8V power supply circuit, a 1.2V power supply circuit, a 1.8V power supply circuit, and a 3.3V power supply regulator circuit.

[0021] The 3.3V power supply regulator circuit includes an inductor L1, a voltage regulator capacitor C14, and a filter capacitor C10; the external 3.3V power supply outputs a stable 3.3V power supply after passing through L1 and connecting C14 and C10 in parallel.

[0022] The 2.8V power supply circuit includes U8, which uses an SGM2036-2.8YUDH4G / TR chip; the 3.3V power supply is connected to the VIN and EN pins of U8 through an LC circuit; the OUT pin of U8 outputs 2.8V power through a voltage regulator capacitor C34 and a filter capacitor C35.

[0023] The 1.8V power supply circuit includes U9, which uses the SGM2036-1.8YUDH4G / TR chip; the 3.3V power supply is connected to the VIN and EN pins of U9; the OUT pin of U9 outputs 1.8V power through the voltage regulator capacitors C36 and C32 and the filter capacitor C31.

[0024] The 1.2V power supply circuit includes U6, which uses an MT3410L chip; a 3.3V power supply is connected to the VIN and EN pins of U6 after a parallel voltage regulator capacitor C28 is connected; the SW pin of U6 outputs a 1.2V power supply after a parallel connection of resistor R17 and capacitor C18 through inductor L2; the other end of R17 is connected to the FB pin of U6 and resistor R18, and the other end of R18 is grounded.

[0025] Preferably, the video output circuit includes U2, which uses an MS1681 chip. The DAC_OUT pin of U1 is connected in parallel with R2 and then connected to the IN pin of U2 through capacitor C1. The other end of R2 is grounded. The VCC and PS pins of U2 are connected to a 3.3V power supply. The OUT pin of U2 is connected to the external interface TP1 through R1.

[0026] Preferably, the gyroscope circuit includes U7, which uses a DS-IDG-2030U chip. The SDA, SCL, and CS pins of U7 are connected to a 3.3V power supply through pull-up resistors; the FSYNC, ADO, RESV-G, REGOUT, and GND pins of U7 are grounded; and the VDD pin of U7 is connected to a 3.3V power supply.

[0027] The gyroscope information processing circuit includes U4, which uses a CA51F152S1 / N1 microcontroller. The RX pin of U4 is connected to the UART_TX pin of U1, the TX pin of U4 is connected to the UART_RX pin, the P3.5 pin of U4 is connected to the SCL pin of U7, the P3.2 pin of U4 is connected to the SDA pin of U7, the VDD pin of U7 is connected to a 3.3V power supply, and the GND pin is grounded.

[0028] Preferably, the auxiliary circuit includes a voltage monitoring circuit, a first interface circuit, and a second interface circuit;

[0029] The input terminal of the voltage monitoring circuit is connected to the output terminal of the 3.3V power supply regulator circuit, and after passing through RC, it is used as the output terminal of the voltage monitoring circuit and connected to the RESETB pin of U1.

[0030] The first interface circuit includes resistors R6, R8, R12, R16 and external interface TP6; TP6 is connected to R16, R12, R8 and R6 respectively, the other end of R6 is connected to a 3.3V power supply, the other end of R8 is connected to the SETTING_SEL0 pin of U1, the other end of R12 is grounded, and the other end of R16 is connected to the GPIO11 pin of U1.

[0031] The second interface circuit includes resistors R7, R9, R13 and an external interface TP7; TP7 is connected to R7, R9 and R13 respectively, the other end of R13 is grounded, the other end of R9 is connected to the SETTING_SEL1 pin of U1, and the other end of R7 is connected to a 3.3V power supply.

[0032] The beneficial effects of adopting the above technical solution are as follows:

[0033] This invention integrates functional modules such as image acquisition, vehicle status monitoring, signal processing, and power management to form a standardized hardware platform. Technicians no longer need to build hardware circuits from scratch; they can directly power on the device for software debugging and functional verification, significantly reducing the time and cost of hardware development and compatibility testing, and lowering the difficulty of industrial development and use. Attached Figure Description

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Figure 1 This is the wiring diagram of the image sensor in this utility model;

[0036] Figure 2 This is the wiring diagram of the image processor in this utility model;

[0037] Figure 3 This is a circuit diagram of the software storage module in this utility model;

[0038] Figure 4 This is the circuit diagram of the 2.8V power supply circuit in this utility model;

[0039] Figure 5 This is the circuit diagram of the 1.2V power supply circuit in this utility model;

[0040] Figure 6 This is the circuit diagram of the 1.8V power supply circuit in this utility model.

[0041] Figure 7 This is a circuit diagram of the 3.3V regulated power supply circuit in this utility model;

[0042] Figure 8 This is a circuit diagram of the video output circuit in this utility model;

[0043] Figure 9 This is a circuit diagram of the gyroscope circuit in this utility model;

[0044] Figure 10 This is a circuit diagram of the gyroscope information processing circuit in this utility model;

[0045] Figure 11 This is a circuit diagram of the voltage monitoring circuit in this utility model;

[0046] Figure 12 This is a circuit diagram of the first interface and the second interface circuit in this utility model. Detailed Implementation

[0047] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0048] A video signal circuit for monitoring vehicle status includes an image sensor, an image processor, a software storage module, a power supply circuit, a video output circuit, a vehicle status monitoring module, and auxiliary circuits.

[0049] The auxiliary circuit includes a voltage monitoring circuit, a first interface circuit, and a second interface circuit;

[0050] The vehicle status monitoring module includes a gyroscope circuit and a gyroscope information processing circuit;

[0051] After acquiring external image information, the image processor transmits it to the image processor. The image processor, as the processing core, processes the image information and then outputs the image through the video output circuit.

[0052] The voltage monitoring circuit, the first interface circuit, the second interface circuit, the vehicle status monitoring module, and the software storage module are respectively connected to the image processor; the power supply circuit provides power to the circuit.

[0053] The gyroscope circuit is connected to the gyroscope information processing circuit.

[0054] like Figure 1 The image sensor U5 uses the SC1346 chip. The EXTCLK, XCHUTDN, SCL, and SDA pins of U5 are connected to the image processor U1. The DVDD pin of U5 is connected to a 1.5V power supply; the DOVDD pin is connected to a 1.8V power supply; the AVDD pin is connected to a 2.8V power supply; the VREF1 and VREFN pins are grounded through a capacitor; the PWDNB pin is connected to a 1.8V power supply; the MCN, MCP, MDN, and MDP pins of U5 are connected to the image processor U1; and the ground pin of U5 is grounded.

[0055] like Figure 2 The image processor U1 uses the XC5323A chip;

[0056] The CVDD pin of U1 is connected to a 1.2V power supply; the AVDDMTX pin of U1 is connected to a 1.8V power supply; the VDDIO2 pin of U1 is connected to a 3.3V power supply; the AVDDMRX pin of U1 is connected to a 1.8V power supply; the VDDIO1 pin of U1 is connected to a 1.8V power supply; the ADC_COMP pin of U1 is connected to a 3.3V power supply; the DAC_CVDD pin is connected to a 1.2V power supply; and the AVDDDAC pin is connected to a 3.3V voltage.

[0057] The MRXCN pin of U1 is connected to the MCN pin of U5, the MRXCP pin is connected to the MCP pin of U5, the MRXDN0 pin is connected to the MDN pin of U5, and the MRXDP0 pin is connected to the MDP pin of U5; the CCLK pin of U1 is connected to the EXTCLK pin of U5, and the SNR_RST pin is connected to the XCHUTDN pin of U5; the I2C0_SCK pin of U1 is connected to a 1.8V power supply via a pull-up resistor and is also connected to the SCL pin of U5; the I2C0_SDA pin of U1 is connected to a 1.8V power supply via a pull-up resistor and is also connected to the SDA pin of U5.

[0058] Image sensor U5 (SC1346) is responsible for capturing external images. It transmits raw image data in differential signal form to the MRX series pins of image processor U1 (XC5323A) via the MCN, MCP, MDN, and MDP pins, ensuring interference immunity for high-speed data transmission. U1, as the core, provides an external clock signal (EXTCLK) to U5 via the CCLK pin and controls U5's reset (XCHUTDN) via the SNR_RST pin. It also connects to the SCL and SDA pins via the I2C bus to configure U5's operating parameters. The processed image is output to the video output circuit via the DAC_OUT pin.

[0059] The SETTING_SEL1 and GPIO11 pins of U1 are connected to the first interface circuit; the GPIO23 pin of U1 is grounded; XO and XI of U1 are connected to the two ends of the crystal oscillator X1, respectively; the RESETB pin of U1 is connected to the voltage monitoring circuit; the SPI_CSN, SPI_SCK, SPI_MOSI, and SPI_MISO pins of U1 are connected to the software storage module; the UART_TX and UART_RX pins are connected to the external interfaces TP4 and TP5 and the gyroscope information processing circuit, respectively.

[0060] The DAC_OUT pin of U1 is connected to the video output module; the DAC_COMP pin of U1 is connected to a 3.3V power supply through capacitor C4; the DAC_REXT pin of U1 is grounded.

[0061] like Figure 3The software storage module includes U3, which uses the M25P80 chip. The CS pin of U3 is connected to the SPI_CSN pin of U1, the SCK pin of U3 is connected to the SPI_SCK pin of U1, the SI pin of U3 is connected to the SPI_MOSI pin of U1, and the SO pin of U3 is connected to the SPI_MISO pin of U1. The VCC, HOLD, and WP pins of U3 are connected to a 3.3V power supply after being connected in parallel with a filter capacitor.

[0062] The system communicates with U1 via the SPI bus: the CS (chip select), SCK (clock), MOSI (master transmit), and MISO (slave transmit) pins correspond to U1's SPI_CSN, SPI_SCK, SPI_MOSI, and SPI_MISO, respectively, enabling the storage and retrieval of program code and configuration parameters, and facilitating data exchange with the master control chip U1. The HOLD and WP pins are connected to 3.3V parallel filter capacitors to disable data retention and write protection, respectively, preventing accidental overwriting of stored content. In practical implementations, the SPI bus can be used to connect to multiple software storage modules, increasing software storage space.

[0063] like Figure 4-7 The power supply circuit includes a 2.8V power supply circuit, a 1.2V power supply circuit, a 1.8V power supply circuit, and a 3.3V power supply regulator circuit.

[0064] The 3.3V power supply regulator circuit includes inductor L1, voltage regulator capacitor C14, and filter capacitor C10; the external 3.3V power supply is connected in parallel with C14 and C10 through L1 to output a stable 3.3V power supply.

[0065] The 2.8V power supply circuit includes U8, which uses the SGM2036-2.8YUDH4G / TR chip; the 3.3V power supply is connected to the VIN and EN pins of U8 through an LC circuit; the OUT pin of U8 outputs 2.8V power through the voltage regulator capacitor C34 and the filter capacitor C35.

[0066] The 1.8V power supply circuit includes U9, which uses the SGM2036-1.8YUDH4G / TR chip; the 3.3V power supply is connected to the VIN and EN pins of U9; the OUT pin of U9 outputs 1.8V power through the voltage regulator capacitors C36 and C32 and the filter capacitor C31.

[0067] The 1.2V power supply circuit includes U6, which uses the MT3410L chip; the 3.3V power supply is connected to the VIN and EN pins of U6 after being connected in parallel with the voltage regulator capacitor C28; the SW pin of U6 outputs 1.2V power through the inductor L2 connected in parallel with the resistor R17 and the capacitor C18; the other end of R17 is connected to the FB pin of U6 and the resistor R18, and the other end of R18 is grounded.

[0068] An external 3.3V power supply, after being filtered by inductor L1 to suppress high-frequency noise and capacitors C14 and C10 to remove ripple, provides basic power to all modules of the circuit, ensuring stable operation of the digital circuit. A 2.8V power supply is dedicated to powering the AVDD pin of the image sensor U5, meeting the high power accuracy requirements of analog circuits; a 1.8V power supply simultaneously powers the I / O interface (VDDIO1) of U1 and the DOVDD pin of U5, ensuring digital signal level matching; and a 1.2V power supply powers the CVDD and DAC_CVDD pins, which serve as the core voltage of U1, reducing power consumption during high-frequency operations.

[0069] like Figure 8 The video output circuit includes U2, which uses the MS1681 chip. The DAC_OUT pin of U1 is connected in parallel with R2 and then connected to the IN pin of U2 through capacitor C1. The other end of R2 is grounded. The VCC and PS pins of U2 are connected to a 3.3V power supply. The OUT pin of U2 is connected to the external interface TP1 through R1.

[0070] The DAC_OUT pin of U1 outputs an analog video signal, which is then impedance matched by resistor R2 and DC blocked by capacitor C1 before being input to the IN pin of U2. U2 amplifies and shapes the signal, and then outputs it to the external interface TP1 through the OUT pin and resistor R1. In practice, TP1 is connected to an external video display device such as a vehicle display screen for video display. Connecting the PS pin to 3.3V indicates that the chip is in normal operating mode.

[0071] like Figure 9 The gyroscope circuit includes U7, which uses the DS-IDG-2030U chip. The SDA, SCL, and CS pins of U7 are connected to a 3.3V power supply through pull-up resistors; the FSYNC, AD0, RESV-G, REGOUT, and GND pins of U7 are grounded; and the VDD pin of U7 is connected to a 3.3V power supply.

[0072] like Figure 10 The gyroscope information processing circuit includes U4, which uses a CA51F152S1 / N1 microcontroller. The RX pin of U4 is connected to the UART_TX pin of U1, the TX pin of U4 is connected to the UART_RX pin, the P3.5 pin of U4 is connected to the SCL pin of U7, the P3.2 pin of U4 is connected to the SDA pin of U7, the VDD pin of U7 is connected to the 3.3V power supply, and the GND pin is grounded.

[0073] The gyroscope chip U7 (DS-IDG-2030U) communicates with the information processing circuit U4 (CA51F152S1 / N1 microcontroller) through the SCL and SDA pins to collect motion data such as the vehicle's angular velocity and acceleration. After U4 preprocesses the data, it transmits it to U1 through the UART interface TX and RX to realize the synchronous fusion of image information and motion status, such as determining whether the vehicle is braking suddenly or turning.

[0074] The auxiliary circuit includes a voltage monitoring circuit, a first interface circuit, and a second interface circuit;

[0075] Among them, such as Figure 11 The input of the voltage monitoring circuit is connected to the output of the 3.3V power supply regulator circuit. After passing through an RC circuit, the output of the voltage monitoring circuit is connected to the RESETB pin of U1. When a 3.3V power supply is connected, after being delayed and filtered by an RC circuit, it is connected to the RESETB pin of U1. When the power supply voltage is lower than the threshold, U1 is triggered to reset, preventing abnormal circuit operation.

[0076] like Figure 12 The first interface circuit includes resistors R6, R8, R12, R16 and an external interface TP6. TP6 is connected to R16, R12, R8 and R6 respectively. The other end of R6 is connected to a 3.3V power supply. The other end of R8 is connected to the SETTING_SEL0 pin of U1. The other end of R12 is grounded. The other end of R16 is connected to the GPIO11 pin of U1. By connecting the SETTING_SEL0 and GPIO11 of U1 through the resistor network, external DIP switches or sensors can be connected to configure the circuit's operating mode.

[0077] The second interface circuit includes resistors R7, R9, and R13, as well as an external interface TP7. TP7 is connected to R7, R9, and R13 respectively. The other end of R13 is grounded, the other end of R9 is connected to the SETTING_SEL1 pin of U1, and the other end of R7 is connected to a 3.3V power supply. Connecting to SETTING_SEL1 has a similar function, allowing adjustment of U1's parameters via external signals, thus enhancing circuit expandability.

[0078] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A video signal circuit for monitoring vehicle status, characterized in that, It includes an image sensor, an image processor, a software storage module, a power supply circuit, a video output circuit, a vehicle status monitoring module, and auxiliary circuits; The auxiliary circuit includes a voltage monitoring circuit, a first interface circuit, and a second interface circuit. The vehicle status monitoring module includes a gyroscope circuit and a gyroscope information processing circuit; After acquiring external image information, the image processor transmits it to the image processor. The image processor, as the processing core, processes the image information and then outputs the image through the video output circuit. The voltage monitoring circuit, the first interface circuit, the second interface circuit, the vehicle status monitoring module, and the software storage module are respectively connected to the image processor; the power supply circuit provides power to the circuit. The gyroscope circuit is connected to the gyroscope information processing circuit.

2. The video signal circuit for monitoring vehicle status according to claim 1, characterized in that, The image sensor U5 uses an SC1346 chip. The EXTCLK, XCHUTDN, SCL, and SDA pins of the image sensor U5 are connected to the image processor U1. The DVDD pin of the image sensor U5 is connected to a 1.5V power supply. The DOVDD pin of the image sensor U5 is connected to a 1.8V power supply. The AVDD pin of the image sensor U5 is connected to a 2.8V power supply. The VREF1 and VREFN pins of the image sensor U5 are grounded through a capacitor. The PWDNB pin of the image sensor U5 is connected to a 1.8V power supply. The MCN, MCP, MDN, and MDP pins of the image sensor U5 are connected to the image processor U1. The ground pin of the image sensor U5 is grounded.

3. The video signal circuit for monitoring vehicle status according to claim 1, characterized in that, The image processor U1 uses the XC5323A chip; The CVDD pin of image sensor U1 is connected to a 1.2V power supply, the AVDDMTX pin is connected to a 1.8V power supply, the VDDIO2 pin is connected to a 3.3V power supply, the AVDDMRX pin is connected to a 1.8V power supply, the VDDIO1 pin is connected to a 1.8V power supply, the ADC_COMP pin is connected to a 3.3V power supply, the DAC_CVDD pin is connected to a 1.2V power supply, and the AVDDDAC pin is connected to a 3.3V voltage. The MRXCN pin of image sensor U1 is connected to the MCN pin of U5, the MRXCP pin is connected to the MCP pin of image sensor U5, the MRXDN0 pin is connected to the MDN pin of image sensor U5, and the MRXDP0 pin is connected to the MDP pin of image sensor U5; the CCLK pin of image sensor U1 is connected to the EXTCLK pin of image sensor U5, and the SNR_RST pin is connected to the XCHUTDN pin of image sensor U5; the I2C0_SCK pin of image sensor U1 is connected to a 1.8V power supply via a pull-up resistor and is also connected to the SCL pin of image sensor U5; the I2C0_SDA pin of image sensor U1 is connected to a 1.8V power supply via a pull-up resistor and is also connected to the SDA pin of image sensor U5. The SETTING_SEL1 and GPIO11 pins of the image sensor U1 are connected to the first interface circuit; the GPIO23 pin of the image sensor U1 is grounded; XO and XI of the image sensor U1 are respectively connected to the two ends of the crystal oscillator X1; the RESETB pin of the image sensor U1 is connected to the voltage monitoring circuit; the SPI_CSN, SPI_SCK, SPI_MOSI, and SPI_MISO pins of the image sensor U1 are connected to the software storage module; the UART_TX and UART_RX pins of the image sensor U1 are respectively connected to the external interfaces TP4 and TP5 and the gyroscope information processing circuit. The DAC_OUT pin of the image sensor U1 is connected to the video output module; the DAC_COMP pin of the image sensor U1 is connected to a 3.3V power supply through capacitor C4; and the DAC_REXT pin of the image sensor U1 is grounded.

4. The video signal circuit for monitoring vehicle status according to claim 1, characterized in that, The software storage module includes U3, which uses an M25P80 chip; The CS pin of U3 is connected to the SPI_CSN pin of U1, the SCK pin of U3 is connected to the SPI_SCK pin of U1, the SI pin of U3 is connected to the SPI_MOSI pin of U1, and the SO pin of U3 is connected to the SPI_MISO pin of U1. The VCC, HOLD and WP pins of U3 are connected to a 3.3V power supply after being connected in parallel with a filter capacitor.

5. The video signal circuit for monitoring vehicle status according to claim 1, characterized in that, The power supply circuit includes a 2.8V power supply circuit, a 1.2V power supply circuit, a 1.8V power supply circuit, and a 3.3V power supply regulator circuit. The 3.3V power supply regulator circuit includes an inductor L1, a voltage regulator capacitor C14, and a filter capacitor C10; the external 3.3V power supply outputs a stable 3.3V power supply after passing through L1 and connecting C14 and C10 in parallel. The 2.8V power supply circuit includes U8, which uses an SGM2036-2.8YUDH4G / TR chip; the 3.3V power supply is connected to the VIN and EN pins of U8 through an LC circuit; the OUT pin of U8 outputs 2.8V power through a voltage regulator capacitor C34 and a filter capacitor C35. The 1.8V power supply circuit includes U9, which uses the SGM2036-1.8YUDH4G / TR chip; the 3.3V power supply is connected to the VIN and EN pins of U9; the OUT pin of U9 outputs 1.8V power through the voltage regulator capacitors C36 and C32 and the filter capacitor C31. The 1.2V power supply circuit includes U6, which uses an MT3410L chip; a 3.3V power supply is connected to the VIN and EN pins of U6 after a parallel voltage regulator capacitor C28 is connected; the SW pin of U6 outputs a 1.2V power supply after a parallel connection of resistor R17 and capacitor C18 through inductor L2; the other end of R17 is connected to the FB pin of U6 and resistor R18, and the other end of R18 is grounded.

6. The video signal circuit for monitoring vehicle status according to claim 1, characterized in that, The video output circuit includes U2, which uses an MS1681 chip. The DAC_OUT pin of the image sensor U1 is connected in parallel with R2 and then connected to the IN pin of U2 through capacitor C1. The other end of R2 is grounded. The VCC and PS pins of U2 are connected to a 3.3V power supply. The OUT pin of U2 is connected to the external interface TP1 through R1.

7. The video signal circuit for monitoring vehicle status according to claim 1, characterized in that, The gyroscope circuit includes U7, which uses the DS-IDG-2030U chip. The SDA, SCL, and CS pins of U7 are connected to a 3.3V power supply through pull-up resistors; the FSYNC, AD0, RESV-G, REGOUT, and GND pins of U7 are grounded; and the VDD pin of U7 is connected to a 3.3V power supply. The gyroscope information processing circuit includes U4, which uses a CA51F152S1 / N1 microcontroller. The RX pin of U4 is connected to the UART_TX pin of U1, the TX pin of U4 is connected to the UART_RX pin, the P3.5 pin of U4 is connected to the SCL pin of U7, the P3.2 pin of U4 is connected to the SDA pin of U7, the VDD pin of U7 is connected to a 3.3V power supply, and the GND pin is grounded.

8. The video signal circuit for monitoring vehicle status according to claim 1, characterized in that, The auxiliary circuit includes a voltage monitoring circuit, a first interface circuit, and a second interface circuit. The input terminal of the voltage monitoring circuit is connected to the output terminal of the 3.3V power supply regulator circuit, and after passing through RC, it is used as the output terminal of the voltage monitoring circuit and connected to the RESETB pin of the image sensor U1. The first interface circuit includes resistors R6, R8, R12, R16 and external interface TP6; TP6 is connected to R16, R12, R8 and R6 respectively, the other end of R6 is connected to a 3.3V power supply, the other end of R8 is connected to the SETTING_SEL0 pin of U1, the other end of R12 is grounded, and the other end of R16 is connected to the GPIO11 pin of U1. The second interface circuit includes resistors R7, R9, R13 and an external interface TP7; TP7 is connected to R7, R9 and R13 respectively, the other end of R13 is grounded, the other end of R9 is connected to the SETTING_SEL1 pin of U1, and the other end of R7 is connected to a 3.3V power supply.

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