A high-hardness intelligent driving monitoring lens cover

Abstract

The utility model relates to the technical field of driving monitoring lens cover, in particular to a high-hardness intelligent driving monitoring lens cover, comprising a lens cover base and a window piece fixed on the top of the lens cover base; the window piece is made of soda-lime black glass, and the lens cover base and the window piece are integrally formed. The utility model uses soda-lime black glass as the lens cover to improve the hardness of the lens cover and prevent scratches.

Description

Technical Field

[0001] The utility model relates to the technical field of driving monitoring lens covers, in particular to an intelligent driving monitoring lens cover with high hardness. Background Art

[0002] Due to the popularity of intelligent driving, DMS came into being. DMS (Driver Monitoring System) is a driver monitoring system: fatigue detection, attention detection, and abnormal behavior detection. With the widespread use of DMS applications, there are often some extensions of functions based on these three functions, such as facial identification and gesture recognition. Moreover, as an important component of DMS, the infrared lens cover must protect the service life of the infrared lens and have certain aesthetics and wear resistance. At present, the infrared lens cover used by DMS is basically made of infrared-transmitting (i.e., the average transmittance at 800nm-950nm is greater than 87%) polycarbonate material injection molding. Its disadvantages are as follows: the hardness of polycarbonate is generally low, and the hardness of the plastic substrate can usually only reach 6B. The surface hardness can be increased to HB through some hardening coating processes. Due to the needs of its use scenario, the DMS infrared lens cover is placed in front of the main driver's seat and is easily wiped frequently. The low hardness of polycarbonate is prone to scratches, and large-area scratches will reduce the image clarity. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a high-hardness intelligent driving monitoring lens cover. Using soda-lime black glass as the lens cover can improve the hardness of the lens cover and prevent scratches.

[0004] The utility model adopts the following technical scheme to achieve: a high-hardness intelligent driving monitoring lens cover, comprising a lens cover base and a window piece fixed on the top of the lens cover base; the window piece is made of soda-lime black glass, and the lens cover base and the window piece are integrally formed.

[0005] Preferably, the average transmittance of the soda-lime black glass in the 400nm-700nm band is less than 3%, and the average transmittance in the 800nm-950nm band is greater than 90%.

[0006] Preferably, the lens cover base is non-transparent, and is made of a material having an average transmittance of less than 5% at 400nm-950nm and a material having an average transmittance of greater than 87% at 800nm-950nm.

[0007] Preferably, the lens cover base is made of black polycarbonate.

[0008] Preferably, the thickness of the window piece is 1.2-2 mm.

[0009] Preferably, the surface roughness of the window piece is less than 10 nm.

[0010] Preferably, the thickness of the lens cover base is 1-2 mm.

[0011] Preferably, the top of the lens cover base has two through holes.

[0012] Preferably, a light-isolating rib is provided in the lens cover base between the two through holes.

[0013] Preferably, the width of the light-isolating ribs is 1-2 mm.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides an embodiment, in which the material of the window piece is soda-lime black glass. The hardness of the soda-lime black glass can reach 6H, which meets the friction resistance requirement of the DMS infrared lens cover. Compared with the hardness of polycarbonate, it has a significant improvement, and effectively solves the problem of lens cover scratches.

[0016] The thickness of the window piece is 1.2-2mm, and the optimal value is 1.5mm. If the thickness is too thin, the window piece will be easily cracked when embedded in the injection mold as a step. If the thickness is too thick, it will have a certain impact on the imaging clarity.

[0017] The surface roughness of the window piece is less than 10nm, and the surface contour of the soda-lime black glass at this roughness value is less than 5μm. The surface contour of the polycarbonate infrared lens cover of the same size is about 30μm. Therefore, the appearance and imaging clarity of the DMS window piece made of soda-lime black glass are much better than those of the polycarbonate injection molded window piece.

[0018] There is a light-isolating rib between the two through holes in the base of the lens cover to prevent the infrared light emitted by the infrared lamp from interfering with the lens and affecting the imaging clarity.

[0019] The utility model uses soda-lime black glass as the lens cover, which can improve the hardness of the lens cover and prevent scratches. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings.

[0022] like Figure 1The utility model provides an embodiment: a high-hardness intelligent driving monitoring lens cover, comprising a lens cover base 2 and a window piece 1 fixed on the top of the lens cover base 2; the window piece 1 is made of soda-lime black glass, the hardness of which can reach 6H, meeting the friction resistance requirement of the DMS infrared lens cover, and having a significantly improved hardness compared to polycarbonate, effectively solving the problem of lens cover scratches, and the lens cover base 2 and the window piece 1 are integrally formed by injection molding.

[0023] The average transmittance of the soda-lime black glass in the 400nm-700nm band is less than 3%, and the average transmittance in the 800nm-950nm band is greater than 90%, so that it can transmit infrared light, so that the infrared light reaching the target object can be reflected back to the lens 3 through the soda-lime black glass; it cannot transmit visible light. If the transmittance in the visible light band is too high, stray light will appear in the imaging, affecting the imaging effect.

[0024] The lens cover base 2 is non-transparent, and is made of a material with an average transmittance of less than 5% at 400nm-950nm. The base portion needs to isolate infrared light and visible light to prevent imaging from being disturbed by stray light.

[0025] The lens cover base 2 is made of black polycarbonate, which can isolate infrared light and visible light.

[0026] The thickness of the window sheet 1 is 1.2-2 mm, and the optimal value is 1.5 mm. If the thickness is too thin, the window sheet 1 is easily cracked when embedded in the injection mold as a step, and if the thickness is too thick, it will have a certain impact on the imaging clarity.

[0027] The surface roughness of the window piece 1 is less than 10 nm. At this roughness value, the surface contour of the soda-lime black glass is less than 5 μm, and the surface contour of the polycarbonate infrared lens cover of the same size is about 30 μm. Therefore, the appearance and imaging clarity of the DMS window piece 1 made of soda-lime black glass are much better than those of the polycarbonate injection molded window piece 1.

[0028] The thickness of the lens cover base 2 is 1-2 mm, and the optimal value is 1.5 mm, which is consistent with the thickness of the window piece and is conducive to injection molding.

[0029] The top of the lens cover base 2 has two through holes 6 , one through hole 6 is used for the infrared light emitted by the infrared lamp 4 to pass through, and the other through hole 6 is used for the infrared light reflected back from the target object to pass through and be received by the lens 3 .

[0030] The lens cover base 2 has a light-isolating rib 5 between the two through holes 6 to prevent the infrared lamp 4 from emitting infrared light that interferes with the lens 3 and affects the image clarity.

[0031] The width of the light-isolating rib 5 is 1-2 mm, with an optimal value of 1.5 mm, which is consistent with the overall wall thickness of the lens cover base 2 and is conducive to injection molding.

[0032] The following description is only for explaining how to make the lens cover of the present invention, and the present invention does not protect it.

[0033] Method for making the lens cover of the utility model:

[0034] 1. Cut the soda-lime black glass into the designed size of the DMS infrared lens cover IR glass window by laser cutting.

[0035] 2. A soda-lime black glass window is used as a step piece and embedded in the injection mold of the infrared lens cover base. The molten black opaque polycarbonate material is injected into the mold cavity. After cooling, the mold is opened to take out the injection-molded DMS infrared lens cover.

[0036] 3. Repeat the above steps to achieve mass production of high-hardness DMS infrared lens covers.

[0037] The above description is only a preferred embodiment of the present invention and should not be construed as a limitation to the present application. All equivalent changes and modifications made within the scope of the present invention should fall within the scope of the present invention.

Claims

1. A high-hardness intelligent driving monitoring lens cover, characterized in that: It comprises a lens cover base and a window piece fixed on the top of the lens cover base; the window piece is made of soda-lime black glass, and the lens cover base and the window piece are integrally formed.

2. The high-hardness intelligent driving monitoring lens cover according to claim 1, characterized in that: The average transmittance of the soda-lime black glass in the 400nm-700nm band is less than 3%, and the average transmittance in the 800nm-950nm band is greater than 90%.

3. The high-hardness intelligent driving monitoring lens cover according to claim 1, characterized in that: The lens cover base is non-transparent, and is made of a material with an average transmittance of less than 5% at 400nm-950nm and a material with an average transmittance of more than 87% at 800nm-950nm.

4. The high-hardness intelligent driving monitoring lens cover according to claim 3, characterized in that: The lens cover base is made of black polycarbonate.

5. The high-hardness intelligent driving monitoring lens cover according to claim 1, characterized in that: The thickness of the window piece is 1.2-2 mm.

6. The high-hardness intelligent driving monitoring lens cover according to claim 1, characterized in that: The surface roughness of the window piece is less than 10 nm.

7. The high-hardness intelligent driving monitoring lens cover according to claim 1, characterized in that: The thickness of the lens cover base is 1-2 mm.

8. A high-hardness intelligent driving monitoring lens cover according to any one of claims 1 to 7, characterized in that: The top of the lens cover base is provided with two through holes.

9. The high-hardness intelligent driving monitoring lens cover according to claim 8, characterized in that: A light-isolating rib is provided between the two through holes in the lens cover base.

10. The high-hardness intelligent driving monitoring lens cover according to claim 9, characterized in that: The width of the light-isolating ribs is 1-2 mm.

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