Vehicle-mounted simulation 2K camera circuit

Abstract

The utility model discloses a vehicle-mounted simulation 2K camera circuit, which comprises an image sensor module capable of converting an optical signal into an electric signal and generating original image data, and an image processing module for carrying out noise reduction, color correction and distortion correction processing on an original image according to the generated original image data, the embedded processing module is used for carrying out a computer vision algorithm according to face recognition and action detection of the driver; according to the utility model, through the arrangement of the simulation 2K camera circuit and the linkage design of the white light on-off circuit and the embedded processing module, when the fatigue state of a driver is detected, active warning is realized directly through on-off flickering of a white light LED. Compared with a traditional passive reminding mode which only depends on screen display, the physical light stimulation can more intuitively wake up the attention of the driver. The three-stage series structure of the white light LEDs is combined with the driving control of the voltage stabilizing diode VZ1 and the MOS tube, so that the illumination intensity is ensured to be stable and adjustable, and the warning requirements in different environments are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera technical field, concretely is vehicle analog 2K camera circuit. BACKGROUND

[0002] Vehicle analog camera is a series of cameras applied to vehicle scene monitoring and outputting analog signals.

[0003] The vehicle camera in the prior art mainly includes a car camera for recording traffic accident evidence or recording images along the way, a reversing image camera for displaying rear images to assist parking when hanging or reversing, a surround view camera for displaying a full view around the vehicle by splicing multiple camera images to reduce blind areas, an ADAS camera for supporting lane keeping, and an in-vehicle camera for monitoring the fatigue state of the driver and recording the situation in the vehicle.

[0004] After searching, a low-power vehicle cabin camera circuit is disclosed in a patent with application number CN217770220U, which includes an image sensor module, an image processor module, a serializer module, a power manager module, an LED driver module, and an infrared LED lamp. The output of the image sensor module is connected to the image processor module, the image processor module outputs YUV image signals to the serializer module, and the serializer is connected to the vehicle host end through a wire harness. The image processor module sends a square wave signal to the DIM pin of the LED driver chip, and the LED driver module outputs a voltage to drive the infrared LED lamp with the same frequency and duty cycle as the control signal.

[0005] The in-vehicle camera is mainly used for monitoring the members in the vehicle, can record the fatigue state of the driver and is equipped with an infrared light for light compensation, and improves the exposure effect of the camera. However, after recording the fatigue state of the driver, the in-vehicle camera cannot effectively remind the driver. Utility model content

[0006] The utility model aims at providing a vehicle analog 2K camera circuit, by adding a white light on-off circuit, when the embedded processing module detects that the driver is in a fatigue state, compared with the traditional method of displaying on the car display screen, this method can play a warning role by turning on and off the white light.

[0007] In order to realize the above object, the utility model provides the following technical scheme: vehicle-mounted simulation 2K camera circuit, including the image sensor module that can convert optical signal into electric signal and generate original image data, the image processing module that carries out denoising, color correction, distortion correction processing to original image according to the original image data generated, the embedded processing module that carries out computer vision algorithm according to driver face recognition, action detection, power manager module and the communication module that interacts with vehicle-mounted ECU, the power manager module is connected with image sensor module, image processing module, embedded processing module and communication module electricity respectively;The communication module includes serial port circuit and white light starting and closing circuit, and the white light starting and closing circuit is electrically connected with the serial port circuit.

[0008] Preferably, the white light starting and closing circuit includes a white light LED driver and an inductor L1, the white light LED driver adopts R1211 model, the EXT end of the white light LED driver is connected with a MOS tube, the DILAY end of the white light LED driver is connected with a capacitor C2, one end of the inductor L1 is connected with a capacitor C1, and the other end of the inductor L1 is connected with a diode circuit.

[0009] Preferably, the diode circuit includes a zener diode VZ1, the inductor L1 is connected with the anode of the zener diode VZ1, the anode of the zener diode VZ1 is connected with the D pole of the MOS tube, the S pole of the MOS tube is grounded, the cathode of the zener diode VZ1 is connected with a capacitor C3 and a light-emitting diode LED, the light-emitting diode LED is provided with three groups, the three groups of light-emitting diodes are connected in series, and the cathode of the light-emitting diode LED is connected with a resistor R1.

[0010] Preferably, the embedded processing module includes a Cortex A9 chip and a power circuit, the AC11 end of the Cortex A9 chip is connected with a transistor Q6, the AB11 end of the Cortex A9 chip is connected with a resistor R51, one end of the resistor R51 is connected with a Y2 crystal oscillator, and the Y2 crystal oscillator is externally connected with a capacitor C56 and a capacitor C58.

[0011] Preferably, the embedded processing module further includes an FE1.1S chip, the 28th pin of the FE1.1S chip is connected with a capacitor C0603, the 22nd pin of the FE1.1S chip is connected with a resistor R55, the 3rd pin of the FE1.1S chip is connected with a Y3 crystal oscillator, the FE1.1S chip is electrically connected with the Cortex A9 chip, and the Y2 crystal oscillator and the Y3 crystal oscillator both adopt CRY-D3225 chips.

[0012] Preferably, the power supply circuit comprises a chip U9, the chip U9 adopts a BY62 chip, the 5th pin of the chip U9 is connected with a capacitor C42, the 4th pin of the chip U9 is connected with a resistor R43 and a capacitor C45, the 1st pin of the chip U9 is connected with a capacitor C50 and a capacitor C43, and the capacitor C50 and the capacitor C43 are connected in parallel.

[0013] Preferably, the power supply circuit further comprises a chip U8, the 1st pin of the chip U8 is connected with a power supply VCC, the 4th pin of the chip U8 is connected with a resistor R42 and a capacitor C48, the 3rd pin of the chip U8 is connected with a resistor R45, and one end of the power supply VCC is connected with a capacitor C49.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a white light opening and closing circuit and the linkage design of embedded processing module are added to the analog 2K camera circuit, when detecting the driver fatigue state, directly through the opening and closing flicker of white light LED, realizes the initiative warning. Compared with the traditional passive reminding mode of only relying on the screen display, the physical light stimulation can more directly awaken the driver's attention and improve the driving safety. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the system block diagram of the utility model;

[0017] Figure 2 It is the circuit diagram of the white light opening and closing circuit of the utility model;

[0018] Figure 3 It is the circuit diagram of the embedded processing module of the utility model;

[0019] Figure 4 It is the circuit diagram of the FE1.1S chip of the utility model;

[0020] Figure 5 It is the circuit diagram of the chip U9 in the power supply circuit of the utility model;

[0021] Figure 6 It is the circuit diagram of the chip U8 in the power supply circuit of the utility model. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Please refer to Figures 1-6 The utility model provides a technical scheme: vehicle-mounted simulation 2K camera circuit, including image sensor module that can convert optical signal into electric signal and generate original image data, image processing module that carries out denoising, color correction, distortion correction processing to original image according to generated original image data, embedded processing module that carries out computer vision algorithm according to driver face recognition, action detection, power manager module and communication module that interacts with vehicle-mounted ECU, the power manager module is electrically connected with image sensor module, image processing module, embedded processing module and communication module respectively;The communication module includes serial port circuit and white light on-off circuit, and the white light on-off circuit is electrically connected with the serial port circuit.

[0024] The device mainly uses physical light to wake up the driver by adding a white light on-off circuit, compared with the traditional camera circuit, the simulation 2K camera circuit can effectively improve the safety of vehicle driving, wherein the image sensor module, the image processing module and the communication module are the same as the prior art, the image sensor module is used to convert optical signal into electric signal and generate original image data, the image processing module carries out denoising, color correction and distortion correction processing to the original image, and the communication module is connected with the display of the vehicle and the external Bluetooth.

[0025] The white light on-off circuit includes a white light LED driver and an inductor L1, the white light LED driver adopts R1211 model, a MOS tube is connected to the EXT end of the white light LED driver, a capacitor C2 is connected to the DILAY end of the white light LED driver, one end of the inductor L1 is connected with a capacitor C1, and the other end of the inductor L1 is connected with a diode circuit.

[0026] The R1211 driver in the white light on-off circuit and the boost topology structure composed of the inductor L1 and the capacitors C1-C3 cooperate with the MOS tube to dynamically control the duty cycle, which can improve the driving efficiency of the white light LED. At the same time, the protection circuit formed by the voltage stabilizing diode VZ1 and the resistor R1 effectively suppresses the reverse current impact and prolongs the service life of the LED. The VCC input end of the chip U8 in the power supply circuit adopts a capacitor C49 high-frequency filter design to reduce the influence of electromagnetic interference on the communication module.

[0027] The diode circuit comprises a voltage stabilizing diode VZ1, the inductor L1 is connected with the positive pole of the voltage stabilizing diode VZ1, the positive pole of the voltage stabilizing diode VZ1 is connected with the D pole of the MOS tube, the S pole of the MOS tube is grounded, the negative pole of the voltage stabilizing diode VZ1 is connected with the capacitor C3 and the light emitting diode LED, the light emitting diode LED is provided with three groups, the three groups of light emitting diodes are connected in series, and the negative pole of the light emitting diode LED is connected with the resistor R1.

[0028] The embedded processing module comprises a Cortex A9 chip and a power supply circuit, a transistor Q6 is connected to the AC11 end of the Cortex A9 chip, a resistor R51 is connected to the AB11 end of the Cortex A9 chip, one end of the resistor R51 is connected with a Y2 crystal oscillator, and the Y2 crystal oscillator is externally connected with a capacitor C56 and a capacitor C58.

[0029] The embedded processing module cooperates with the FE1.1S chip and the Y2 / Y3 dual crystal oscillator to improve the operation efficiency of image processing and computer vision algorithm, and improve the real-time performance of functions such as face recognition and motion detection.

[0030] The embedded processing module further comprises an FE1.1S chip, a capacitor C0603 is connected to the 28th pin of the FE1.1S chip, a resistor R55 is connected to the 22nd pin of the FE1.1S chip, and a Y3 crystal oscillator is connected to the 3rd pin of the FE1.1S chip; the FE1.1S chip is electrically connected with the Cortex A9 chip, and the Y2 crystal oscillator and the Y3 crystal oscillator both adopt CRY-D3225 chips.

[0031] The power supply circuit comprises a chip U9, the chip U9 adopts a BY62 chip, a capacitor C42 is connected to the 5th pin of the chip U9, a resistor R43 and a capacitor C45 are connected to the 4th pin of the chip U9, a capacitor C50 and a capacitor C43 are connected to the 1st pin of the chip U9, and the capacitor C50 and the capacitor C43 are connected in parallel.

[0032] The power supply manager module realizes multi-stage voltage stabilization and filtering through the cascade connection of the BY62 chip and the U8 chip and the parallel connection of the capacitors C42 and C45, and can ensure the system stability in a complex voltage fluctuation scene of a vehicle.

[0033] The power supply circuit further comprises a chip U8, a power supply VCC is connected to the 1st pin of the chip U8, a resistor R42 and a capacitor C48 are connected to the 4th pin of the chip U8, a resistor R45 is connected to the 3rd pin of the chip U8, and one end of the power supply VCC is connected with a capacitor C49.

[0034] In use, the image of the driver is collected by a camera sensor in the image sensor module, and the light signal is converted into an electrical signal and original image data is generated, the CMOS sensor data is carried to the memory by DMA, the image is processed by the ISP hardware accelerator, the computer vision algorithm (such as face recognition, action detection) eye tracking is run by the Cortex A9 chip in the embedded processing module, the way of head-up display is adjusted, the state of the driver is analyzed in real time, such as fatigue, distracted behavior, when the driver is judged to be tired, the white light on-off circuit works, controls the light-emitting diode LED to turn on and off twice, and the driver's attention can be directly awakened through physical light stimulation. Compared with the passive reminding mode of the traditional screen display, the driving safety can be improved.

[0035] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An in-vehicle analog 2K camera circuit, characterized by: The system includes an image sensor module that converts light signals into electrical signals and generates raw image data; an image processing module that performs noise reduction, color correction, and distortion correction on the raw image based on the generated raw image data; an embedded processing module that performs computer vision algorithms based on driver face recognition and motion detection; a power management module; and a communication module that interacts with the vehicle ECU. The power management module is electrically connected to the image sensor module, the image processing module, the embedded processing module, and the communication module. The communication module includes a serial port circuit and a white light on / off circuit, and the white light on / off circuit is electrically connected to the serial port circuit.

2. The in-vehicle analog 2K camera circuit of claim 1, wherein: The white light switching circuit includes a white LED driver and an inductor L1. The white LED driver is an R1211 model. A MOSFET is connected to the EXT terminal of the white LED driver, and a capacitor C2 is connected to the DILAY terminal of the white LED driver. One end of the inductor L1 is connected to the capacitor C1, and the other end of the inductor L1 is connected to a diode circuit.

3. The in-vehicle analog 2K camera circuit of claim 2, wherein: The diode circuit includes a Zener diode VZ1. The inductor L1 is connected to the anode of the Zener diode VZ1. The anode of the Zener diode VZ1 is connected to the drain (D) of the MOSFET. The source (S) of the MOSFET is grounded. The cathode of the Zener diode VZ1 is connected to a capacitor C3 and an LED. There are three groups of LEDs connected in series. The cathode of each LED is connected to a resistor R1.

4. The in-vehicle analog 2K camera circuit of claim 3, wherein: The embedded processing module includes a Cortex A9 chip and a power supply circuit. A transistor Q6 is connected to the AC11 terminal of the Cortex A9 chip, and a resistor R51 is connected to the AB11 terminal of the Cortex A9 chip. A Y2 crystal oscillator is connected to one end of the resistor R51, and a capacitor C56 and a capacitor C58 are externally connected to the Y2 crystal oscillator.

5. The vehicle-mounted analog 2K camera circuit according to claim 4, characterized in that: The embedded processing module also includes an FE1.1S chip. A capacitor C0603 is connected to pin 28 of the FE1.1S chip, a resistor R55 is connected to pin 22 of the FE1.1S chip, and a Y3 crystal oscillator is connected to pin 3 of the FE1.1S chip. The FE1.1S chip is electrically connected to a Cortex A9 chip, and both the Y2 and Y3 crystal oscillators are CRY-D3225 chips.

6. The vehicle-mounted analog 2K camera circuit according to claim 5, characterized in that: The power supply circuit includes a chip U9, which is a BY62 chip. A capacitor C42 is connected to the 5th pin of the chip U9. A resistor R43 and a capacitor C45 are connected to the 4th pin of the chip U9. A capacitor C50 and a capacitor C43 are connected to the 1st pin of the chip U9. The capacitors C50 and C43 are connected in parallel.

7. The vehicle-mounted analog 2K camera circuit according to claim 6, characterized in that: The power supply circuit also includes a chip U8. The first pin of the chip U8 is connected to the power supply VCC. The fourth pin of the chip U8 is connected to a resistor R42 and a capacitor C48. The third pin of the chip U8 is connected to a resistor R45. One end of the power supply VCC is connected to a capacitor C49.

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