A miniaturized DMS camera

Abstract

The utility model discloses a miniaturized DMS camera head, including front shell, back shell, optical filter and sensor board, one side of front shell is fixedly connected with optical filter, and the other side of front shell is fixedly connected with back shell, and the side of sensor board to optical filter is equipped with mirror seat and lamp stand, is equipped with camera on mirror seat, is equipped with LED lamp on lamp stand, is equipped with first through -hole in the position of corresponding with camera on front shell, is equipped with second through -hole in the position of corresponding with LED lamp on front shell, still be equipped with heat conduction ring on sensor board, and heat conduction ring sets up around the LED lamp a circle, and fills in phase change material in heat conduction ring. The scheme can reduce the influence of the heat generated by LED lamp to sensor board and camera head, can also greatly reduce the size of DMS camera head, guarantees the installation effect in the car.

Description

Technical Field

[0001] This utility model relates to the field of video surveillance processing equipment technology, specifically to a miniaturized DMS camera. Background Technology

[0002] A vehicle-mounted DMS (Driver Monitoring System) camera is a video monitoring and processing device used in vehicles. It is one of the core components of intelligent vehicle safety technology, mainly preventing traffic accidents caused by fatigue, distraction, etc. by monitoring the driver's status in real time.

[0003] Vehicle-mounted DMS cameras, through precise visual perception, act as "sentinels" protecting driving safety—providing dynamic protection throughout the entire journey, from physiological fatigue to behavioral risks. Installation locations must strictly adhere to angle and distance specifications to ensure reliability, while technological integration (such as infrared imaging) and regulatory requirements are driving their development towards intelligence and concealment. In the future, with deeper integration with in-cabin OMS and external vehicle interaction, DMS will not only be a safety tool but also a core hub for human-vehicle co-driving.

[0004] In existing technologies, vehicle-mounted DMS cameras include a sensor board, an LED light board, and a camera. The LED light board is equipped with LED lights, which actively emit infrared light of a specific wavelength to provide a stable imaging light source for the camera in all weather conditions, ensuring accurate capture of facial biometric features in complex scenarios such as darkness, strong light, or when the driver is wearing sunglasses. The sensor board, also known as the infrared image sensing motherboard or DMS image processing board, has the core function of carrying the CMOS / CCD infrared image sensor, converting the driver's facial optical signals into electrical signals, and performing primary noise reduction / enhancement processing.

[0005] In existing technologies, LED lights generate a lot of heat when they are working. To avoid the heat generated by the LED lights affecting the sensor board and camera, there is a large distance between the LED lights, the sensor, and the camera. This results in the overall size of the DMS camera becoming very large, which affects the installation of the DMS camera in the vehicle. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is: how to provide a miniaturized DMS camera that can reduce the impact of the heat generated by the LED light on the sensor board and the camera, while also greatly reducing the size of the DMS camera and ensuring the effect of installation in the vehicle.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A miniaturized DMS camera includes a front shell, a rear shell, a filter, and a sensor plate. One side of the front shell is fixedly connected to the filter, and the other side of the front shell is fixedly connected to the rear shell. A receiving cavity is formed between the front shell and the rear shell. The sensor plate is disposed in the receiving cavity and fixedly connected to the front shell. A lens mount and a lamp mount are provided on the side of the sensor plate facing the filter. A camera is mounted on the lens mount, and an LED is mounted on the lamp mount. A first through hole is formed on the front shell at a position corresponding to the camera, allowing the camera to pass through the first through hole for image acquisition. A second through hole is formed on the front shell at a position corresponding to the LED, allowing light emitted by the LED to pass through the second through hole. A heat-conducting ring is also provided on the sensor plate, surrounding the LED and filled with a phase change material.

[0008] The working principle of this utility model is as follows: The DMS camera of this solution integrates an LED light and a lens mount on the sensor board. The LED light is mounted on the light mount, and the camera is mounted on the lens mount, thus directly integrating the LED light board into the sensor board. Simultaneously, the camera is also integrated into the sensor board in a single unit, significantly reducing the overall size of the DMS camera. Furthermore, considering the significant heat generated by the LED light during operation, a heat-conducting ring is incorporated into the sensor board, wrapping around the LED light. A phase change material is filled within the heat-conducting ring. This, along with the phase change material, effectively absorbs the heat generated by the LED light, minimizing its impact on the sensor board and camera, and ensuring the normal operation of the DMS camera. Therefore, the integrated design and the structure of the heat-conducting ring and phase change material in this DMS camera solution reduce the impact of heat generated by the LED light on the sensor board and camera while significantly reducing the size of the DMS camera.

[0009] Preferably, a mounting boss is provided on the front housing at the position where the filter is fixed, the first through hole and the second through hole both penetrate the mounting boss, and the filter is connected to the mounting boss.

[0010] In this way, by setting mounting bosses on the front housing, the filters can be installed and positioned, ensuring accurate installation of the filters.

[0011] Preferably, the heat-conducting ring is configured to contact the lamp holder.

[0012] In this way, the heat-conducting ring is set to contact the lamp holder, so that the heat generated by the LED lamp can be transferred to the heat-conducting ring in a timely manner after being transferred to the lamp holder, thus further ensuring the heat dissipation effect of the LED lamp.

[0013] Preferably, the phase change material filling rate in the heat-conducting ring is 75%~80%.

[0014] In this way, the phase change material filling rate in the heat-conducting ring is 75%~80%. Since the phase change material will expand in volume when it absorbs heat and liquefies, a certain expansion space is reserved in the heat-conducting ring, while ensuring that there is enough phase change material to absorb the heat generated by the LED lamp in a timely manner.

[0015] Preferably, thermally conductive silicone is also adhered at multiple locations on the sensor plate.

[0016] In this way, the thermally conductive silicone can dissipate heat from the sensor board in a timely manner, keeping the entire sensor board within a suitable temperature range.

[0017] Preferably, multiple buckles are provided around the front shell, and a retaining ring is provided on the rear shell at a position corresponding to the buckle. The retaining ring has a retaining hole, and the buckle is engaged in the retaining hole.

[0018] In this way, the front and rear shells are fixedly connected by clips and snap holes on the snap rings, which makes installation and disassembly convenient.

[0019] Preferably, a sealing gasket is provided between the mounting boss and the filter, and a third through hole adapted to the first through hole is provided on the sealing gasket at the position corresponding to the first through hole, and a fourth through hole adapted to the second through hole is provided on the sealing gasket at the position corresponding to the second through hole.

[0020] By setting a sealing gasket, the probability of external dust and other contaminants entering the DMS camera can be reduced, thereby improving the working efficiency of the DMS camera.

[0021] Preferably, the filter is made of a black optical material that transmits red light at 940nm, and the filter is bonded to the front shell.

[0022] In this way, the filter is made of black optical material that is red-transparent at 940nm, which gives it high transmittance in the 940nm band ("red-transparent"), while its black appearance reduces visible light reflection, thus achieving the effect of "invisible to the human eye, but efficiently captured by the sensor".

[0023] Preferably, the sensor plate is fixedly connected to the front housing by screws.

[0024] Preferably, the sensor plate, the lamp holder, and the mirror holder are integrally formed.

[0025] Compared with the prior art, this utility model integrates the LED light board into the sensor board, eliminating the need for a separate LED light board. At the same time, the camera is also integrated into the sensor board in an integrated structure, which reduces costs and greatly reduces the size of the entire DMS camera. Attached Figure Description

[0026] Appendix Figure 1 This is a schematic diagram of the structure of the miniaturized DMS camera of this utility model; Appendix Figure 2 This is an exploded view of the miniaturized DMS camera of this utility model; Appendix Figure 3 This is a schematic diagram of the front shell structure of the miniaturized DMS camera of this utility model; Appendix Figure 4 This is a schematic diagram of the sensor board in the miniaturized DMS camera of this utility model; Appendix Figure 5 This is a front view of the sensor board in the miniaturized DMS camera of this utility model.

[0027] Explanation of reference numerals in the attached drawings: Front shell 1, mounting boss 101, buckle 102, first through hole 103, second through hole 104, rear shell 2, retaining ring 201, filter 3, sensor plate 4, camera 5, lens mount 6, lamp mount 7, LED light 8, heat conduction ring 9. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation on the embodiments. Moreover, the method and / or process should not be limited to the steps performed in the written order; those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0031] A vehicle-mounted DMS (Driver Monitoring System) camera is a video monitoring and processing device used in vehicles. It is one of the core components of intelligent vehicle safety technology, mainly preventing traffic accidents caused by fatigue, distraction, etc. by monitoring the driver's status in real time.

[0032] In existing technologies, vehicle-mounted DMS cameras include a sensor board, an LED light board, and a camera. The LED light board is equipped with LED lights, which actively emit infrared light of a specific wavelength to provide a stable imaging light source for the camera in all weather conditions, ensuring accurate capture of facial biometric features in complex scenarios such as darkness, strong light, or when the driver is wearing sunglasses. The sensor board, also known as the infrared image sensing motherboard or DMS image processing board, has the core function of carrying the CMOS / CCD infrared image sensor, converting the driver's facial optical signals into electrical signals, and performing primary noise reduction / enhancement processing.

[0033] In existing technologies, LED lights generate a lot of heat when they are working. To avoid the heat generated by the LED lights affecting the sensor board and camera, there is a large distance between the LED lights, the sensor, and the camera. This results in the overall size of the DMS camera becoming very large, which affects the installation of the DMS camera in the vehicle.

[0034] To address the aforementioned technical problems, this specific embodiment provides a miniaturized DMS camera, as shown in the attached figure. Figure 1 To the attached Figure 2 As shown, the system includes a front shell 1, a rear shell 2, a filter 3, and a sensor plate 4. The filter 3 is made of a black optical material that transmits red light at 940nm and is bonded to the front shell 1. The use of a black optical material that transmits red light at 940nm results in high transmittance ("red transmission") in the 940nm wavelength band, while its black appearance reduces visible light reflection, thus achieving the effect of being "invisible to the human eye but efficiently captured by the sensor."

[0035] For details, see attached. Figure 3 As shown, one side of the front housing 1 is fixedly connected to the filter 3. A mounting boss 101 is provided on the front housing 1 at the position where the filter 3 is fixed. The first through hole 103 and the second through hole 104 both penetrate the mounting boss 101, and the filter 3 is connected to the mounting boss 101. By providing the mounting boss 101 on the front housing 1, the filter 3 is installed and positioned using the mounting boss 101, ensuring accurate installation of the filter 3. In addition, a sealing gasket (not shown) is provided between the mounting boss 101 and the filter 3. A third through hole corresponding to the first through hole 103 is provided on the sealing gasket, and a fourth through hole corresponding to the second through hole 104 is provided on the sealing gasket. By providing the sealing gasket, the probability of external dust and other contaminants entering the DMS camera can be reduced, improving the working efficiency of the DMS camera.

[0036] Specifically, as shown in the appendix Figure 2 and attached Figure 3 As shown, the other side of the front shell 1 is fixedly connected to the rear shell 2. Multiple buckles 102 are provided around the front shell 1; in this specific embodiment, there are four buckles 102, each located around one of the four perimeters. On the rear shell 2, corresponding to the buckles 102, protruding retaining rings 201 are provided. Each retaining ring 201 has a retaining hole, into which the buckles 102 engage. The front shell 1 and the rear shell 2 are fixedly connected via the buckles 102 and the retaining holes on the retaining rings 201. This connection method facilitates installation and disassembly.

[0037] Specifically, a receiving chamber is formed between the front shell 1 and the rear shell 2, and the sensor plate 4 is disposed within the receiving chamber and fixedly connected to the front shell 1 by screws. (See attached diagram) Figure 4 and attached Figure 5 As shown, a mirror mount 6 and a lamp mount 7 are provided on the side of the sensor plate 4 facing the filter 3. In practice, the mirror mount 6 and lamp mount 7 can be integrally formed with the sensor plate 4, or they can be connected by screws or other fixing methods. A camera 5 is mounted on the mirror mount 6, which is used to collect driver information. An LED 8 is mounted on the lamp mount 7. The LED 8 actively emits infrared light of a specific wavelength to provide a stable imaging light source for the camera 5 in all weather conditions, ensuring accurate capture of facial biometric features in complex scenarios such as darkness, strong light, or when the driver is wearing sunglasses. In this specific embodiment, the camera 5 and the LED are mounted on the same horizontal plane. A first through hole 103 is provided on the front housing 1 at the position corresponding to the camera 5, so that the camera 5 can pass through the first through hole 103 to collect image information of the driver. A second through hole 104 is provided on the front housing 1 at the position corresponding to the LED light 8, so that the light emitted by the LED light 8 can pass through the second through hole 104 and illuminate the driver. A heat-conducting ring 9 is also provided on the sensor board 4, which is arranged around the LED light 8 and is in contact with the lamp holder 7. This allows the heat generated by the LED light 8 to be transferred to the heat-conducting ring 9 in a timely manner through contact after being transferred to the lamp holder 7, further ensuring the heat dissipation effect of the LED light 8. At the same time, the heat-conducting ring 9 is filled with a phase change material. In this specific embodiment, the heat-conducting ring 9 can be made of metal, giving it good thermal conductivity. The phase change material is paraffin wax, which is solid at room temperature, facilitating its filling within the heat-conducting ring 9. When the heat-conducting ring 9 absorbs heat from the LED 8 and its temperature rises to the liquefaction temperature of the paraffin wax, the wax absorbs heat and liquefies. To ensure sufficient phase change material for heat absorption and provide expansion space for liquefaction, the phase change material filling rate within the heat-conducting ring 9 is 75%~80%. Furthermore, to further improve the heat dissipation of the sensor plate 4, thermally conductive silicone is adhered to multiple locations on the sensor plate 4. This silicone effectively dissipates heat from the sensor plate 4, maintaining it within a suitable temperature range.

[0038] When the vehicle-mounted DMS camera in this solution is working, the LED light 8 emits infrared light of a specific wavelength, providing a stable imaging light source for the camera 5 in all weather conditions, ensuring accurate capture of facial biometric features in complex scenarios such as darkness, strong light, or when the driver is wearing sunglasses. The camera 5 then collects the driver's information, and the collected data is transmitted to the sensor board 4 for processing. The processed data from the sensor board 4 is further transmitted to an external controller for further processing. This solution's DMS camera integrates the LED light 8 directly onto the sensor board 4 by setting a lamp holder 7 and a mirror holder 6 on the sensor board 4, mounting the camera 5 on the lamp holder 7, and the camera 5 on the mirror holder 6. This significantly reduces the overall size of the DMS camera. Meanwhile, considering the significant heat generated by the LED 8 during operation, a heat-conducting ring 9 is installed on the sensor board 4, wrapping around the LED 8. A phase change material is filled within the heat-conducting ring 9. This allows the heat-conducting ring 9 and the phase change material to absorb the heat generated by the LED 8, thereby reducing the impact of the heat from the LED 8 on the sensor board 4 and the camera 5, ensuring the normal operation of the DMS camera. Therefore, this solution's DMS camera, with its integrated design and the structure of the heat-conducting ring 9 and phase change material, not only reduces the impact of the heat generated by the LED 8 on the sensor board 4 and the camera 5, but also significantly reduces the size of the DMS camera.

[0039] Compared with the prior art, this utility model integrates the LED light board 8 into the sensor board 4, eliminating the separate LED light board 8. At the same time, the camera 5 is also integrated into the sensor board 4 in an integrated structure, which reduces costs and greatly reduces the size of the entire DMS camera.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A miniaturized DMS camera characterized in that, The device includes a front shell, a rear shell, a filter, and a sensor plate. One side of the front shell is fixedly connected to the filter, and the other side of the front shell is fixedly connected to the rear shell. A receiving chamber is formed between the front shell and the rear shell. The sensor plate is disposed in the receiving chamber and fixedly connected to the front shell. A lens mount and a lamp mount are provided on the side of the sensor plate facing the filter. A camera is mounted on the lens mount, and an LED light is mounted on the lamp mount. A first through hole is provided on the front shell at a position corresponding to the camera, allowing the camera to pass through the first through hole for image acquisition. A second through hole is provided on the front shell at a position corresponding to the LED light, allowing the light emitted by the LED light to pass through the second through hole. A heat-conducting ring is also provided on the sensor plate, which surrounds the LED light and is filled with a phase change material.

2. The miniaturized DMS camera of claim 1, wherein, A mounting boss is provided on the front housing at the position where the filter is fixed. The first through hole and the second through hole both penetrate the mounting boss, and the filter is connected to the mounting boss.

3. The miniaturized DMS camera of claim 2, wherein, A sealing gasket is provided between the mounting boss and the filter. A third through hole, which is adapted to the first through hole, is opened on the sealing gasket at the position corresponding to the first through hole. A fourth through hole, which is adapted to the second through hole, is opened on the sealing gasket at the position corresponding to the second through hole.

4. The miniaturized DMS camera according to claim 1, characterized in that, Multiple buckles are provided around the front shell, and a retaining ring is provided on the rear shell at a position corresponding to the buckle. The retaining ring has a retaining hole, and the buckle is engaged in the retaining hole.

5. The miniaturized DMS camera according to claim 1, characterized in that, The filter is made of a black optical material that transmits red light at 940nm, and the filter is bonded to the front shell.

6. The miniaturized DMS camera according to claim 1, characterized in that, The heat-conducting ring is positioned to contact the lamp holder.

7. The miniaturized DMS camera according to claim 1, characterized in that, The phase change material filling rate in the heat-conducting ring is 75%~80%.

8. The miniaturized DMS camera according to claim 1, characterized in that, Thermally conductive silicone is also adhered at multiple locations on the sensor plate.

9. The miniaturized DMS camera according to claim 1, characterized in that, The sensor plate is fixedly connected to the front housing by screws.

10. The miniaturized DMS camera according to claim 1, characterized in that, The sensor plate, the lamp holder, and the mirror holder are integrally formed.

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