Automobile rearview mirror night vision light supplement and video acquisition system based on infrared technology

Abstract

The utility model discloses an automobile rearview mirror night vision light supplement and video acquisition system based on an infrared technology, which comprises a light supplement module, a video acquisition module and a control module, and the control module is electrically connected with the light supplement module and the video acquisition module respectively. The video acquisition module comprises an infrared camera, a display screen and a video processing circuit which are installed on an automobile rearview mirror, the infrared camera is electrically connected with the video processing circuit, and the video processing circuit is electrically connected with the display screen; according to the utility model, through the cooperation of the light supplementing module, the video acquisition module and the control module, the infrared LED lamp can be automatically turned on or turned off according to the brightness of ambient light, the infrared LED lamp can be automatically turned on to emit red light under a low-light condition, and the infrared camera is used for improving the visibility in foggy weather or dusk in the daytime, so that the brightness of the infrared LED lamp is improved. Therefore, the visibility when the automobile backs up or changes lanes can be improved under the condition of low light, and the driving safety is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile rearview mirror fill-in light systems, in particular to an automobile rearview mirror night vision fill-in light and video acquisition system based on infrared technology. Background Art

[0002] Night vision supplementary lighting and video acquisition systems can help drivers better identify obstacles, pedestrians and other vehicles, improving driving safety, especially when driving in the dark or at night. However, this system cannot completely replace the driver's attention and judgment, and the driver still needs to stay alert and obey traffic rules.

[0003] After searching, the Chinese patent application number is 202110723984.6, which discloses an automotive electronic exterior rearview mirror system and control method. The system includes a light intensity sensor to detect the light intensity of the vehicle's environment in real time, and based on the detection result: when the detected light intensity is greater than the set threshold, the electronic rearview mirror controller drives the ordinary camera on the vehicle's outer bracket to work and displays the captured image on the display screen; when the detected light intensity is not greater than the set threshold, the electronic rearview mirror controller drives the fill light, night vision camera and ordinary camera on the vehicle's outer bracket to work, and fuses the images captured by the night vision camera and the ordinary camera and displays them on the display screen; wherein, the night vision camera and the ordinary camera are both used to capture the image behind the vehicle. This invention can effectively ensure the clarity of the electronic exterior rearview mirror image when the light is dim, and ensure the driving safety of the vehicle.

[0004] However, the above rearview mirror system still has the following defects:

[0005] The above system is not convenient to automatically turn on or off according to the brightness of the ambient light, or to be manually controlled by the driver. In low light conditions, the fill light will not be convenient to light up automatically, which limits visibility and reduces driving safety. Therefore, we need to propose a car rearview mirror night vision fill light and video acquisition system based on infrared technology to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a night vision fill light and video acquisition system for a car rearview mirror based on infrared technology. Through the cooperation of a fill light module, a video acquisition module and a control module, the infrared LED light can be automatically turned on or off according to the brightness of the ambient light, so that it can improve the visibility of the car when reversing or changing lanes under low light conditions, improve driving safety to a certain extent, and solve the problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a night vision fill light and video acquisition system for a rearview mirror of an automobile based on infrared technology, comprising a fill light module, a video acquisition module and a control module, wherein the control module is electrically connected to the fill light module and the video acquisition module respectively, and the video acquisition module comprises an infrared camera, a display screen and a video processing circuit installed on the rearview mirror of the automobile, wherein the infrared camera is electrically connected to the video processing circuit, and the video processing circuit is electrically connected to the display screen;

[0008] The fill light module includes at least one infrared LED lamp distributed around the infrared camera and a lamp control circuit that can automatically turn on or off according to the brightness of the ambient light, and the plurality of infrared LED lamps are connected to the lamp control circuit.

[0009] Preferably, the video processing circuit includes an image processing chip, a memory for temporarily storing image data or video streams, and a processor responsible for coordinating and controlling the operation of the image processing chip and the memory, and the processor is configured as a DSP processor.

[0010] Preferably, the infrared camera is configured as a high-definition infrared camera capable of 360° rotation, one end of the image processing chip is connected to an image sensor interface for connecting to the infrared camera and performing analog signal conversion, and one end of the processor is connected to a video output interface for connecting to a display screen.

[0011] Preferably, the lamp control circuit includes a photoresistor R4, a comparator U1 and a switch tube Q1, the photoresistor R4 is connected between the third and fourth pins of the comparator U1, a resistor R1 is connected between the second and fourth pins of the comparator U1, a resistor R2 is connected between the second and eighth pins of the comparator U1, one end of the resistor R2 is connected to a resistor R3, one end of the resistor R3 is connected to the third pin of the comparator U1, the connection end of the resistor R2 and the comparator U1 is connected to the collector of the switch tube Q1, the base of the switch tube Q1 is connected to one pin of the comparator U1, and the emitter of the switch tube Q1 is respectively connected to multiple infrared LED lamps in parallel.

[0012] Preferably, each of the infrared LED lamps includes a light-emitting diode D and a control switch S, one end of the control switch S is connected to one end of the light-emitting diode D, the other end of the control switch S is connected to the emitter of the switch tube Q1, and the other end of the light-emitting diode D is connected to the connection end of the comparator U1 and the resistor R1.

[0013] Preferably, an LED driver chip U2 is connected in parallel to the light emitting diode D, and one end of the LED driver chip U2 is electrically connected to the control module.

[0014] Preferably, the control module includes a control chip U4, the twenty-eight pins of the control chip U4 are connected to a resistor R11, one end of the resistor R11 is connected to a transistor Q11, the emitter of the transistor Q11 is connected to a transistor Q22, the collector of the transistor Q22 is connected to the driving chip U2, the emitter of the transistor Q22 is connected to the emitter of the transistor Q11 through the resistor R22, the connecting end of the resistor R22 and the transistor Q22 is connected to the display screen through a resistor R33, and the display screen is connected to the control chip U4.

[0015] Preferably, eight pins of the control chip U4 are connected to a resistor R44, one end of the resistor R44 is connected to a transistor Q33, the collector of the transistor Q33 is connected to a buzzer LS1, and the emitter of the transistor Q33 is connected to a 5V voltage.

[0016] Preferably, the thirty-first pin of the control chip U4 is connected to a capacitor C1 having one end connected to a 5V voltage, the other end of the capacitor C1 is connected to a resistor R17 having one end grounded, the connecting end of the resistor R17 and the capacitor C1 is connected to the ninth pin of the control chip U4, the nineteenth pin of the control chip U4 is connected to a capacitor C2 having one end grounded, the eighteenth pin of the control chip U4 is connected to a capacitor C7 having one end grounded, and a crystal oscillator X1 is connected between the non-grounded ends of the capacitor C2 and the capacitor C7.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model mainly cooperates with the fill light module, the video acquisition module and the control module to enable the infrared LED lamp to automatically turn on or off according to the brightness of the ambient light. Under low light conditions, the infrared LED lamp will automatically light up and emit red light. At the same time, the infrared camera is used to improve visibility in foggy weather during the day or at dusk, so that it can improve the visibility of the car when reversing or changing lanes under low light conditions, thereby improving driving safety to a certain extent.

[0019] 2. The utility model uses a display screen, a video processing circuit and an infrared camera to collect video images behind the car through the infrared camera, and then processes the collected video images through the video processing circuit to improve the image quality and clarity. Finally, the collected image information is displayed in real time on the display screen, so that the driver can observe the driving environment behind the car in real time and improve driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a system block diagram of the utility model;

[0021] Figure 2 A circuit diagram of a lamp control circuit of the utility model;

[0022] Figure 3 This is a circuit diagram of connecting the infrared LED lamp and the control module of the utility model;

[0023] Figure 4 This is a circuit diagram of the control module of the utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution: a night vision fill light and video acquisition system for a rearview mirror of a car based on infrared technology, comprising a fill light module, a video acquisition module and a control module, the control module being electrically connected to the fill light module and the video acquisition module respectively, the video acquisition module comprising an infrared camera, a display screen and a video processing circuit installed on the rearview mirror of the car, the infrared camera being electrically connected to the video processing circuit, and the video processing circuit being electrically connected to the display screen; when in use, the fill light module, the video acquisition module and the control module are connected to a car power supply circuit system so as to power the fill light module and the video acquisition module through the car power supply circuit system, the video image behind the car is acquired through the infrared camera, the acquired video image is then processed through the video processing circuit to improve the image quality and clarity, and finally the acquired image information is displayed in real time through the display screen, so as to facilitate the driver to observe the driving environment behind the car in real time and improve the driving safety.

[0026] The video processing circuit includes an image processing chip, a memory for temporarily storing image data or video streams, and a processor responsible for coordinating and controlling the work of the image processing chip and the memory. The processor is set as a DSP processor. The model of the image processing chip used is MDIN270. The input supports dual input and the output is VGA+digital Output. The image or video stream collected from the infrared camera is processed by the image processing chip. The image processing chip can execute various image processing algorithms, such as denoising, adding and edge detection, to improve image quality and clarity. The memory is set as a cache memory.

[0027] The infrared camera is configured as a high-definition infrared camera capable of 360° rotation, which facilitates adjustment of the angle of the infrared camera according to actual shooting needs to expand the shooting range. One end of the image processing chip is connected to an image sensor interface for connecting to the infrared camera and performing analog signal conversion, and one end of the processor is connected to a video output interface for connecting to a display screen. The image sensor interface facilitates conversion of analog signals from the infrared camera into digital signals for processing by the image processing chip, and the processed image data is transmitted to the display screen for display via the video output interface.

[0028] The fill light module includes at least one infrared LED light distributed around the infrared camera and a light control circuit that can automatically turn on or off according to the brightness of the ambient light. Multiple infrared LED lights are connected to the light control circuit. The infrared camera can improve visibility in foggy weather during the day or at dusk, thereby enabling it to improve the visibility of the car when reversing or changing lanes under low light conditions.

[0029] like Figure 2 As shown, the light control circuit includes a photoresistor R4, a comparator U1 and a switch tube Q1. The photoresistor R4 is connected between the third and fourth pins of the comparator U1. A resistor R1 is connected between the second and fourth pins of the comparator U1. A resistor R2 is connected between the second and eighth pins of the comparator U1. One end of the resistor R2 is connected to a resistor R3. One end of the resistor R3 is connected to the third pin of the comparator U1. The connection end of the resistor R2 and the comparator U1 is connected to the collector of the switch tube Q1. The base of the switch tube Q1 is connected to one pin of the comparator U1. The emitter of the switch tube Q1 is respectively connected to a plurality of infrared LED lamps in parallel. The photoresistor R4 is used to sense the brightness of the environment, and the resistance value of the photoresistor R4 is changed according to the intensity of the light. The resistance value of resistor R4 is compared with a preset threshold value (the preset threshold value is determined based on the light intensity at the actual light-dark boundary) through comparator U1. When the ambient light brightness is lower than the threshold value, the resistance value of photoresistor R4 increases, and comparator U1 outputs a high-level signal. The high-level signal controls the switch tube Q1 to close, and the switch tube Q1 is used to control the infrared LED lamp to emit light. When the ambient light brightness is higher than the threshold value, the resistance value of photoresistor R4 decreases, and comparator U1 outputs a low-level signal. The low-level signal controls the switch tube Q1 to disconnect, and the switch tube Q1 is used to control the infrared LED lamp to turn off, so that it is easy to automatically turn on or off according to the brightness of the ambient light. Under low light conditions, the infrared LED lamp will automatically light up and emit red light.

[0030] Each infrared LED lamp includes a light emitting diode D and a control switch S (such as Figure 2In the figure, the light emitting diode D is represented by D1 and D2, the control switch S is represented by S1 and S2), one end of the control switch S is connected to one end of the light emitting diode D, the other end of the control switch S is connected to the emitter of the switch tube Q1, and the other end of the light emitting diode D is connected to the connection end of the comparator U1 and the resistor R1. The corresponding light emitting diode D is controlled to emit light by closing the control switch S.

[0031] like Figure 3 As shown, the LED driver chip U2 is connected in parallel to the light emitting diode D, and one end of the LED driver chip U2 is electrically connected to the control module, so that the driver can manually control the control switch, so that the LED driver chip U2 can drive the light emitting diode D to emit infrared light, so as to facilitate the infrared camera to perform fill light operation through the infrared LED light, because infrared light has a longer wavelength than other types of light (such as visible light or ultraviolet light), which makes it easier to pass through tiny particles in the air, such as fog, rain or dust, thereby enhancing visibility. In addition, since infrared light has no color, it will not interfere with the driver's vision or distract attention.

[0032] like Figure 4 As shown, the control module includes a control chip U4, the twenty-eighth pin of the control chip U4 is connected to a resistor R11, one end of the resistor R11 is connected to a transistor Q11, the emitter of the transistor Q11 is connected to a transistor Q22, the collector of the transistor Q22 is connected to the driving chip U2, the emitter of the transistor Q22 is connected to the emitter of the transistor Q11 through the resistor R22, the connecting end of the resistor R22 and the transistor Q22 is connected to the display screen through the resistor R33, the display screen is connected to the control chip U4, the control chip U4 transmits the current to the display screen and the light control circuit through the control signal and data through the transistor Q11, the transistor Q22 and the corresponding resistor, and displays the collected image information in real time through the display screen, so that the driver can observe the driving environment behind the car in real time, and the infrared LED light is controlled to start or shut down through the light control circuit to realize the fill light operation of the infrared camera.

[0033] The eight pins of the control chip U4 are connected to a resistor R44, one end of the resistor R44 is connected to a transistor Q33, the collector of the transistor Q33 is connected to a buzzer LS1, and the emitter of the transistor Q33 is connected to a 5V voltage. The buzzer LS1 provides a warning to the vehicles beside when driving under low light conditions, so that the vehicles beside can be discovered in time.

[0034] The thirty-first pin of the control chip U4 is connected to a capacitor C1 having one end connected to a 5V voltage, the other end of the capacitor C1 is connected to a resistor R17 having one end grounded, the connecting end of the resistor R17 and the capacitor C1 is connected to the nine-pin of the control chip U4, the nineteen-pin of the control chip U4 is connected to a capacitor C2 having one end grounded, the eighteen-pin of the control chip U4 is connected to a capacitor C7 having one end grounded, a crystal oscillator X1 is connected between the non-grounded ends of the capacitor C2 and the capacitor C7, and a stable power supply noise removal and filtering effect is provided through the capacitor C2 and the capacitor C7 to ensure the stable operation of the control chip U4, and an accurate clock signal is provided through the crystal oscillator X1.

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

Claims

1. A night vision supplementary light and video acquisition system for a rearview mirror of an automobile based on infrared technology, comprising a supplementary light module, a video acquisition module and a control module, wherein the control module is electrically connected to the supplementary light module and the video acquisition module respectively, and characterized in that: The video acquisition module includes an infrared camera, a display screen and a video processing circuit installed on the rearview mirror of the car, the infrared camera is electrically connected to the video processing circuit, and the video processing circuit is electrically connected to the display screen; The fill light module includes at least one infrared LED lamp distributed around the infrared camera and a lamp control circuit that can automatically turn on or off according to the brightness of the ambient light, and the plurality of infrared LED lamps are connected to the lamp control circuit; The lamp control circuit includes a photoresistor R4, a comparator U1 and a switch tube Q1, wherein the photoresistor R4 is connected between the third and fourth pins of the comparator U1, a resistor R1 is connected between the second and fourth pins of the comparator U1, a resistor R2 is connected between the second and eighth pins of the comparator U1, one end of the resistor R2 is connected to a resistor R3, one end of the resistor R3 is connected to the third pin of the comparator U1, the connection end of the resistor R2 and the comparator U1 is connected to the collector of the switch tube Q1, the base of the switch tube Q1 is connected to one pin of the comparator U1, and the emitter of the switch tube Q1 is respectively connected in parallel with a plurality of infrared LED lamps; Each of the infrared LED lamps includes a light-emitting diode D and a control switch S, one end of the control switch S is connected to one end of the light-emitting diode D, the other end of the control switch S is connected to the emitter of the switch tube Q1, and the other end of the light-emitting diode D is connected to the connecting end of the comparator U1 and the resistor R1; an LED driver chip U2 is connected in parallel to the light-emitting diode D, and one end of the LED driver chip U2 is electrically connected to the control module.

2. The infrared technology-based automobile rearview mirror night vision supplementary light and video acquisition system according to claim 1, characterized in that: The video processing circuit includes an image processing chip, a memory for temporarily storing image data or video streams, and a processor responsible for coordinating and controlling the work of the image processing chip and the memory, and the processor is configured as a DSP processor.

3. The infrared technology-based automobile rearview mirror night vision supplementary light and video acquisition system according to claim 2 is characterized in that: The infrared camera is configured as a high-definition infrared camera capable of 360° rotation, one end of the image processing chip is connected to an image sensor interface for connecting to the infrared camera and performing analog signal conversion, and one end of the processor is connected to a video output interface for connecting to a display screen.

4. The infrared technology-based automobile rearview mirror night vision supplementary light and video acquisition system according to claim 3 is characterized in that: The control module includes a control chip U4, the twenty-eight pins of the control chip U4 are connected to a resistor R11, one end of the resistor R11 is connected to a transistor Q11, the emitter of the transistor Q11 is connected to a transistor Q22, the collector of the transistor Q22 is connected to the drive chip U2, the emitter of the transistor Q22 is connected to the emitter of the transistor Q11 through the resistor R22, the connecting end of the resistor R22 and the transistor Q22 is connected to the display screen through a resistor R33, and the display screen is connected to the control chip U4.

5. The automobile rearview mirror night vision supplementary light and video acquisition system based on infrared technology according to claim 4 is characterized in that: The eight pins of the control chip U4 are connected to a resistor R44, one end of the resistor R44 is connected to a transistor Q33, the collector of the transistor Q33 is connected to a buzzer LS1, and the emitter of the transistor Q33 is connected to a 5V voltage.

6. The automobile rearview mirror night vision supplementary light and video acquisition system based on infrared technology according to claim 5 is characterized in that: The thirty-first pin of the control chip U4 is connected to a capacitor C1 having one end connected to a 5V voltage, the other end of the capacitor C1 is connected to a resistor R17 having one end grounded, the connection end between the resistor R17 and the capacitor C1 is connected to the nine-pin of the control chip U4, the nineteen-pin of the control chip U4 is connected to a capacitor C2 having one end grounded, the eighteen-pin of the control chip U4 is connected to a capacitor C7 having one end grounded, and a crystal oscillator X1 is connected between the non-grounded ends of the capacitor C2 and the capacitor C7.

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