Airtightness detection mechanism for automobile laser radome

Abstract

The utility model relates to the technical field of automobile detection, and particularly discloses an air tightness detection mechanism of an automobile laser radar cover, which comprises an upper die sealing cover, a lower die sealing cover and a product support, and is characterized in that a sealing cover sealing strip is clamped between the upper die sealing cover and the lower die sealing cover, and the product support is arranged on the lower die sealing cover. A product is placed on the product support, and a support sealing strip is clamped between the product and the product support. By simulating the water flow direction and the wind direction, 10 Kpa of low-pressure gas is filled into the shell of the product, and the inner cavity of the product is vacuumized to reach the negative pressure value of-10 Kpa. And standing for 1 minute, and detecting the value of pressure reduction of the inner cavity and the value of gas leakage flow by using a pressure sensor. And the inflation pressure and the vacuumizing negative pressure cannot cause damage to electronic components.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile detection, in particular to an airtight detection mechanism of an automobile laser radar cover. Background Art

[0002] With the development of the new energy vehicle industry and the rise of emerging car-making forces in recent years, LiDAR has been widely used in new energy vehicles. The LiDAR assembly on the car is composed of radar sensor, wiring harness, glass cover, and plastic shell. Since the LiDAR assembly is a high-precision electrical component, the LiDAR assembly urgently needs an airtight detection mechanism to perform airtight detection on it during the production process. However, the existing airtight detection mechanisms in China cannot meet the airtightness detection requirements of the LiDAR assembly.

[0003] At present, the principle of the existing airtight detection mechanism in the industry is: block all the holes of the laser radar assembly, connect the air pipe to the laser radar assembly cavity, inflate and pressurize the cavity or evacuate it to form negative pressure, let it stand for a period of time, and finally use the pressure sensor to monitor the pressure drop value in the cavity and the gas leakage flow value to judge whether the airtight performance is qualified.

[0004] Using this method for airtight detection has the following weaknesses:

[0005] 1. Pressurizing or negatively pressurizing the housing will cause irreversible damage to the electrical components and glass cover in the LiDAR assembly;

[0006] 2. After the laser radar assembly is installed on the vehicle, the vehicle is driven normally in a storm, and the rain penetrates from the outside of the shell to the inside of the shell. The existing airtightness detection methods cannot simulate such natural conditions as a storm. Utility Model Content

[0007] In order to solve the above-mentioned problems existing in the prior art, the utility model provides an airtight detection mechanism for an automobile laser radar cover, comprising an upper mold sealing cover, a lower mold sealing cover and a product bracket, and is characterized in that: a sealing cover sealing strip is clamped between the upper mold sealing cover and the lower mold sealing cover, the product bracket is arranged on the lower mold sealing cover, a product is placed on the product bracket, and a bracket sealing strip is clamped between the product and the product bracket.

[0008] Furthermore, the upper mold sealing cover is provided with an inflation hole for applying positive pressure to the product.

[0009] Furthermore, a negative pressure extraction hole is provided on the lower mold sealing cover, and a sensor is provided on the negative pressure extraction hole, and reverse pressure can be applied to the product through the negative pressure extraction hole.

[0010] Furthermore, the product support is arched, the upper edge contour of the product support corresponds to the contour of the product, and there is a cavity between the product support and the product.

[0011] Furthermore, the cavity is connected to the outside world through the negative pressure hole. The inflation hole is pressurized to a pressure value of 10Kpa, and the negative pressure hole is evacuated to a pressure value of -10Kpa. After standing for 1 minute, the cavity is detected using a sensor provided on the negative pressure hole.

[0012] The beneficial effects of the utility model are:

[0013] (1) By simulating the direction of water flow and wind, the product shell is filled with low-pressure gas of 10Kpa, and the inner cavity of the product is vacuumed to a negative pressure value of -10Kpa. After standing for 1 minute, the pressure sensor is used to detect the value of the pressure reduction in the inner cavity and the value of the gas leakage flow. The inflation pressure and vacuum negative pressure will not cause damage to electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a detailed view of the sealing strip of the sealing cover and the sealing strip of the bracket in the utility model.

[0017] Description of main component symbols:

[0018] In the figure: 1. Upper mold sealing cover; 2. Lower mold sealing cover; 3. Inflation hole; 4. Negative pressure extraction hole; 5. Product bracket; 6. Sealing strip of sealing cover; 7. Sealing strip of bracket; 8. Product. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0020] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside" or "outside" etc. is based on the orientation or position described in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0021] See also Figure 1 A gas-tight detection mechanism for an automobile laser radar cover comprises an upper mold sealing cover 1, a lower mold sealing cover 2 and a product support 5, a sealing cover sealing strip 6 is sandwiched between the upper mold sealing cover 1 and the lower mold sealing cover 2, the product support 5 is arranged on the lower mold sealing cover 2, a product 8 is placed on the product support 5, and a support sealing strip 7 is sandwiched between the product 8 and the product support 5.

[0022] Furthermore, the upper mold sealing cover 1 is provided with an inflation hole 3 for applying positive pressure to the product.

[0023] Furthermore, a negative pressure extraction hole 4 is provided on the lower mold sealing cover 2 , and a sensor is provided on the negative pressure extraction hole 4 , and reverse pressure can be applied to the product through the negative pressure extraction hole 4 .

[0024] Furthermore, the product support is arched, the upper edge contour of the product support 5 corresponds to the contour of the product 8 , and there is a cavity between the product support 5 and the product 8 .

[0025] Furthermore, the cavity is connected to the outside world through the negative pressure hole 4. The inflation hole 3 is pressurized to a pressure value of 10Kpa, and the negative pressure hole is evacuated to a pressure value of -10Kpa. After standing for 1 minute, the cavity is detected using the sensor provided on the negative pressure hole.

[0026] The airtightness detection mechanism and detection method of the automotive laser radar cover provided in this embodiment can meet the airtightness detection requirements of automobile manufacturers: 1. After the laser radar assembly is installed, the vehicle is simulated to drive normally in a storm, and the rain penetrates from the outside of the shell into the inside of the shell under natural conditions; 2. According to the national standard IP6X as a qualified airtightness detection requirement; 3. No damage to electronic components during the detection process.

[0027] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An airtight detection mechanism for an automotive laser radar cover, comprising an upper die sealing cover (1), a lower die sealing cover (2) and a product support (5), characterized in that: A sealing cover sealing strip (6) is sandwiched between the upper die sealing cover (1) and the lower die sealing cover (2); the product support (5) is arranged on the lower die sealing cover (2); a product (8) is placed on the product support (5); and a support sealing strip (7) is sandwiched between the product (8) and the product support (5).

2. The airtightness detection mechanism of the automotive laser radar cover according to claim 1 is characterized in that: The upper die sealing cover (1) is provided with an inflation hole (3).

3. The airtightness detection mechanism of the automotive laser radar cover according to claim 1, characterized in that: The lower die sealing cover (2) is provided with a negative pressure extraction hole (4), and the negative pressure extraction hole (4) is provided with a sensor.

4. The airtightness detection mechanism of the automotive laser radar cover according to claim 3 is characterized in that: The product support (5) is arched, the upper edge contour of the product support (5) corresponds to the contour of the product (8), a cavity exists between the product support (5) and the product (8), and the cavity is connected to the outside through the negative pressure extraction hole (4).

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