Reflective monitoring device and vehicle

Abstract

The present invention discloses a reflective monitoring device and a vehicle, which relate to the technical field of monitoring equipment, and solve the technical problem that the existing monitoring device has too large external dimensions due to the need to set up two circuit boards. The reflective monitoring device includes a circuit board equipped with a camera module, an LED electrically connected to the circuit board, a light guide installed on the circuit board, and a shell assembly. The circuit board, the camera module, the LED, and the light guide are all arranged in the shell assembly, and the light emitted by the LED is reflected to the outside of the shell assembly by the light guide. The present invention installs a light guide on the circuit board so that the infrared light emitted by the LED is reflected by the light guide as fill light for the camera, so that the LED is conditionally electrically connected to the circuit board equipped with the camera and the sensor, thereby achieving the purpose of mounting the LED, the camera, and the sensor on the same circuit board, making the internal structure of the monitoring device more compact, which is conducive to reducing the external dimensions of the monitoring device.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring equipment, and in particular to a reflective monitoring device and a vehicle. Background Art

[0002] The driver monitoring system (DMS) uses a camera to capture the driver's facial information. The system determines the driver's head movement, eyelid movement, eye closure frequency, gaze direction, yawning frequency, etc. based on the facial information, thereby analyzing the driver's distraction level, fatigue status, etc. In order to avoid the problem of poor imaging effect of the camera when the light is insufficient, an infrared light source is usually added to the monitoring device near the camera to supplement the facial information captured by the camera.

[0003] In the prior art, in order to ensure the effect of fill light, the LED as an infrared light source needs to be installed in the monitoring device at the head position of the camera. However, the imaging chip of the camera needs to be installed at the tail position of the other side of the camera. Therefore, two circuit boards need to be set up separately, one circuit board is used to carry the LED installed at the head position of the camera, and the other circuit board is used to carry the imaging chip and the sensor installed at the tail position of the camera. This causes the problem of the overall size of the entire monitoring device being too large, which is not conducive to the installation of the monitoring device. In addition, since the thermal power consumption of the LED is very high and the housing of the monitoring device can only be made of plastic, the heat of the LED and the circuit board cannot be dissipated, which makes the operating temperature of the LED, the circuit board and the camera high, reducing the service life of the monitoring device. Summary of the invention

[0004] In view of this, an object of the present invention is to overcome the deficiencies of the prior art. On the first aspect, a reflective monitoring device is provided to solve the technical problem that the monitoring device in the prior art has too large dimensions due to the need to set up two circuit boards.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A reflective monitoring device, comprising:

[0007] A circuit board electrically connected to a camera module for capturing facial status;

[0008] An LED electrically connected to the circuit board;

[0009] a light guide; and

[0010] A housing assembly, wherein the circuit board, the camera module, the LED and the light guide are all arranged in the housing assembly;

[0011] Wherein, the light emitted by the LED is reflected to the outside of the housing assembly through the light guide.

[0012] Based on the above technical solution, the reflective monitoring device can also be improved as follows.

[0013] Optionally, the light guide is mounted on the circuit board and is a prism. A reflective mirror surface of the prism is inclined to the circuit board, and light emitted by the LED is reflected to the outside of the housing assembly after being irradiated by the mirror surface of the prism.

[0014] Optionally, a heat sink is mounted on the circuit board, the LED is mounted on the heat sink, and the LED is arranged opposite to the mirror surface of the prism.

[0015] Optionally, the heat sink block is in a trapezoidal structure as a whole, the lower base of the trapezoidal structure is in contact with the circuit board, the LED is mounted on an inclined surface of the trapezoidal structure, and the inclined surface of the trapezoidal structure is arranged opposite to the mirror surface of the prism.

[0016] Optionally, the inclined surface of the trapezoidal structure has an inclination angle of 20-90° relative to the circuit board, and the mirror surface of the prism has an inclination angle of 10-45° relative to the circuit board.

[0017] Optionally, the light guide is a light guide column, one end of which receives the supplemental light emitted by the LED, and the other end of which extends to the outside of the shell assembly. The light emitted by the LED is irradiated on the light guide column and then irradiated along the light guide column to the outside of the shell assembly.

[0018] Optionally, the shell assembly includes a first shell and a second shell, the first shell is provided with a lens hole and a fill light hole, the circuit board is installed on the second shell, and after the first shell is connected to the second shell, the camera module captures the facial status through the lens hole, and the LED fills the light to the camera module through the fill light hole.

[0019] Optionally, the first shell includes a top plate of a shell assembly, a filter for selecting light waves is arranged on the top of the top plate, and the second shell includes a bottom plate of the shell assembly, a heat dissipation mesh for heat dissipation is arranged on the bottom of the bottom plate.

[0020] Optionally, the first shell is made of plastic, and the second shell is made of aluminum alloy.

[0021] In a second aspect, the present invention further provides a vehicle, comprising the above-mentioned reflective monitoring device, wherein the reflective monitoring device is installed on the vehicle to capture the driver's facial state to determine the driver's driving state.

[0022] Compared with the prior art, the reflective monitoring device provided by the present invention has the following beneficial effects:

[0023] The present invention installs a light guide on a circuit board so that the infrared light emitted by an LED is reflected by the light guide as fill light for a camera, so that the LED is electrically connected to a circuit board carrying a camera and a sensor under certain conditions, thereby achieving the purpose of mounting the LED, camera and sensor on the same circuit board, making the internal structure of the monitoring device more compact and facilitating reducing the external dimensions of the monitoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a schematic cross-sectional view of the reflective monitoring device of the present invention;

[0026] Figure 2 is a schematic diagram of the internal three-dimensional structure of the reflective monitoring device of the present invention;

[0027] Figure 3 yes Figure 1 A schematic diagram of the structure of the first housing and the filter;

[0028] Figure 4 It is a schematic diagram of the upward-looking three-dimensional structure of the reflective monitoring device of the present invention.

[0029] In the figure:

[0030] 1—circuit board; 2—camera module; 3—LED; 4—light guide; 5—heat sink; 61—first shell; 62—second shell; 63—lens hole; 64—fill light hole; 7—filter; 8—heat sink mesh. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than comprehensive embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] The present invention provides a reflective monitoring device, such as Figures 1 to 4 As shown, it includes a circuit board 1, a camera module 2, an LED 3, a light guide 4, a heat sink 5 and a housing assembly. The camera module 2 and the LED 3 are electrically connected to one side of the circuit board 1, and the light guide 4 and the heat sink 5 are connected to the circuit board 1 by gluing or screw connection and are located on the same side as the camera module 2. A cavity for mounting the circuit board 1, the camera module 2, the LED 3, the light guide 4 and the heat sink 5 is provided inside the housing assembly, and the entire circuit board 1 is mounted in the cavity of the housing assembly.

[0034] like Figure 1 and Figure 2 As shown, two light guides 4 and two heat sinks 5 are connected to opposite sides of the camera module 2. The light guide 4 is a right-angled triangular prism, and the heat sink 5 is an aluminum block with an overall right-angled trapezoidal structure. The camera module 2 is located between the two light guides 4, and the heat sink 5 is located on the side away from the camera module 2. The light guide 4 is used for reflecting light, and the mirror surface is inclined with the circuit board 1 and away from the camera module 2. The inclined surface of the heat sink 5 faces the camera module 2, so that the inclined surface of the trapezoidal structure of the heat sink 5 is arranged opposite to the mirror surface of the prism, and the lower bottom of the trapezoidal structure is in contact with the circuit board 1, and the LED 3 is installed on the inclined surface of the trapezoidal structure. When the LED 3 is connected to the circuit board 1, the light emitted by the LED 3 will be reflected to the outside of the housing assembly through the mirror surface of the prism, which is used to fill in the light when the camera module 2 captures facial information when the light is dim.

[0035] The present invention changes the path of the supplementary light emitted by LED 3 by adopting prism reflection, so that LED 3 and camera module 2 can be electrically connected on the same circuit board 1, and there is no need to respectively set two circuit boards in the housing assembly, which is conducive to reducing the external dimensions of the housing assembly, especially the dimensions along the optical axis direction of camera module 2. In addition to carrying and maintaining the inclination of LED 3, the heat sink 5 made of aluminum can also dissipate the heat of LED 3 because the heat generated by LED 3 is very high when working, avoiding the problem of thermal deformation of the imaging chip caused by direct conduction of the heat of LED 3 to the imaging chip of camera module 2, thereby reducing the working temperature of LED 3, camera module 2 and circuit board 1, which is conducive to extending the service life of the monitoring device.

[0036] It is understandable that the positions of the light guide 4 and the heat sink 5 in the present invention can also be interchanged, that is, the heat sink 5 is located on both sides of the camera module 2, the light guide 4 is away from the camera module 2, and the mirror surface of the prism is also set relative to the inclined surface of the trapezoidal structure, which can also realize the light guiding and heat dissipation functions of the LED 3. At the same time, according to the design of the fill light position relative to the optical axis position of the camera module 2, the relative position between the light guide 4 and the heat sink 5 can also be adjusted, which is also beneficial to reduce the external dimensions of the housing assembly. Among them, the heat sink 5 includes an upper surface and a lower bottom surface that are opposite to each other, and the area of ​​the lower bottom surface is larger than the area of ​​the upper surface. The lower bottom surface of the trapezoidal structure of the heat sink 5 is in contact with the circuit board 1, which can expand the heat dissipation area of ​​the LED 3 and evenly disperse the heat of the LED 3 on the circuit board 1 to avoid the burning of the circuit board 1 due to heat concentration, thereby playing a role in protecting the circuit board 1.

[0037] In particular, the inclined surface of the trapezoidal structure of the heat sink 5 has an inclination angle of 20-90° relative to the circuit board 1, and the mirror surface of the prism has an inclination angle of 10-45° relative to the circuit board 1. Among them, it is more appropriate that the inclined surface of the trapezoidal structure has an inclination angle of 45° relative to the circuit board 1, and the mirror surface of the prism has an inclination angle of 22.5° relative to the circuit board 1. The prism of the right-angled triangle structure and the heat sink 5 of the right-angled trapezoidal structure can further reduce the size of the cavity in the housing assembly.

[0038] As another embodiment, the light guide 4 can also be designed as a light guide column structure. Specifically, one end of the light guide column is close to the LED 3 so that the light guide column can receive the fill light emitted by the LED 3, and the other end of the light guide column extends to the outside of the housing assembly. When the LED 3 emits fill light, the fill light is irradiated to the outside of the housing assembly along the path of the light guide column, which can also realize the function of LED 3 being installed on the circuit board 1 and providing fill light to the camera module 2.

[0039] like Figures 1 to 4 As shown, the housing assembly includes a first housing 61 and a second housing 62. The first housing 61 has a top plate as a housing assembly, and a lens hole 63 and a fill light hole 64 are opened on the top of the top plate. The camera module 2 captures the facial state through the lens hole 63, and the LED 3 fills the light for the camera module 2 through the fill light hole 64. The second housing 62 has a bottom plate as a housing assembly, and a plurality of columns are arranged on the top of the bottom plate. The circuit board 1 is installed on the plurality of columns of the bottom plate by screws or pins, so that there is an air gap between the circuit board 1 and the second housing 62, thereby increasing the heat dissipation effect of the circuit board 1. Among them, the connection method between the first housing 61 and the second housing 62 includes but is not limited to snap connection, screw or bolt connection, threaded connection and the like.

[0040] It is understandable that when the first shell 61 is connected to the second shell 62, the cavity between the first shell 61 and the second shell 62 is divided into three independent areas, wherein the camera module 2 is located in the middle area, and the two light guides 4 and the heat sink 5 are located in the areas on both sides. The LED 3 is isolated from the camera module 2 to avoid the interference of the fill light on the camera module 2. Of course, according to the specific shapes and arrangement positions of the circuit board 1, the camera module 2, the LED 3, the light guide 4 and the heat sink 5, the shell assembly can also be designed as a cylindrical, cube or ellipsoidal structural shape.

[0041] like Figures 1 to 4 As shown, a filter 7 for selecting light waves is also provided on the top of the top plate of the first shell 61, and the filter 7 is connected to the shell assembly by gluing or screwing. A heat dissipation mesh 8 for heat dissipation is provided at the bottom of the bottom plate of the second shell 62, which is conducive to dissipating the heat of the monitoring device to the external space through the heat dissipation mesh 8. Among them, the material of the first shell 61 is plastic, so that the first shell 61 can be processed into various required shapes to meet the requirements of decoration, etc. The material of the second shell 62 is aluminum alloy. When the circuit board 1 is installed in the second shell 62, the heat generated on the circuit board 1 can also be dissipated through the aluminum alloy second shell 62 as a heat dissipation base.

[0042] The present invention directly adheres the LED 3 to the heat sink 5, and the entire circuit board 1 is installed on the second shell 62, so that the heat source of the entire monitoring device is connected to the second shell 62, and the heat is dissipated through the second shell 62, which solves the problem that the first shell 61 is plastic and not heat-resistant, and solves the problem of poor heat dissipation effect of the entire monitoring device.

[0043] Embodiment 2:

[0044] The present invention also provides a vehicle, in which the above-mentioned reflective monitoring device is installed in the cab of the vehicle. For example, an ear seat or a bracket can be set on the second housing 62 or installed in the cab by pasting or the like. When the driver shows signs of distraction or fatigue such as shaking his head left and right, frequent eyelid movement, frequent eye closure, unfocused gaze, frequent yawning, etc., the reflective monitoring device can capture the driver's relevant facial state information, thereby being able to judge the driver's driving state and make corresponding alarm processing.

[0045] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reflective monitoring device, characterized in that: include: A circuit board (1) electrically connected to a camera module (2) for capturing facial status; An LED (3) electrically connected to the circuit board (1); a light guide (4); and A housing assembly, wherein the circuit board (1), the camera module (2), the LED (3) and the light guide (4) are all arranged in the housing assembly; A heat sink (5) is mounted on the circuit board (1), the LED (3) is mounted on the heat sink (5), the heat sink (5) is in a trapezoidal structure as a whole, the trapezoidal structure comprises an upper surface and a lower bottom surface which are opposite to each other, the area of ​​the lower bottom surface is larger than the area of ​​the upper surface, the lower bottom surface is in contact with the circuit board (1), and the LED (3) is mounted on the inclined surface of the trapezoidal structure; Wherein, the light emitted by the LED (3) is reflected to the outside of the housing assembly through the light guide (4).

2. The reflective monitoring device according to claim 1, characterized in that: The light guide (4) is mounted on the circuit board (1); the light guide (4) is a prism; a mirror surface of the prism used for reflecting light is arranged obliquely with respect to the circuit board (1); and light emitted by the LED (3) is reflected to the outside of the housing component after being irradiated by the mirror surface of the prism.

3. The reflective monitoring device according to claim 2, characterized in that: The LED (3) is arranged opposite to the mirror surface of the prism.

4. The reflective monitoring device according to claim 3, characterized in that: The inclined surface of the trapezoidal structure is arranged opposite to the mirror surface of the prism.

5. The reflective monitoring device according to claim 4, characterized in that: The inclined angle of the inclined surface of the trapezoidal structure relative to the circuit board (1) is 20-90°, and the inclined angle of the mirror surface of the prism relative to the circuit board (1) is 10-45°.

6. The reflective monitoring device according to claim 1, characterized in that: The light guide member (4) is a light guide column, one end of which receives the supplementary light emitted by the LED (3), and the other end of which extends toward the outside of the housing assembly; the light emitted by the LED (3) is irradiated on the light guide column and then irradiated along the light guide column to the outside of the housing assembly.

7. The reflective monitoring device according to any one of claims 1 to 6, characterized in that: The housing assembly comprises a first housing (61) and a second housing (62); a lens hole (63) and a fill light hole (64) are provided on the first housing (61); the circuit board (1) is mounted on the second housing (62); after the first housing (61) is connected to the second housing (62), the camera module (2) captures the facial state through the lens hole (63), and the LED (3) fills light to the camera module (2) through the fill light hole (64).

8. The reflective monitoring device according to claim 7, characterized in that: The first shell (61) comprises a top plate of a shell assembly, a filter (7) for selecting light waves is arranged on the top of the top plate, and the second shell (62) comprises a bottom plate of the shell assembly, a heat dissipation mesh (8) for heat dissipation is arranged on the bottom of the bottom plate.

9. The reflective monitoring device according to claim 7, characterized in that: The first shell (61) is made of plastic, and the second shell (62) is made of aluminum alloy.

10. A vehicle, characterized in that: It comprises the reflective monitoring device described in any one of claims 1 to 9, wherein the reflective monitoring device is installed on a vehicle and is used to capture the driver's facial state to determine the driver's driving state.

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