A millimeter wave radar component

Abstract

The present invention relates to the field of radar technology, and discloses a millimeter wave radar assembly, including a radar body, a back cover is installed on the back side of the radar body, a gas nozzle is fixedly connected to the lower end of the back cover, the gas nozzle is connected to the inside of the radar body, a connecting block is fixedly connected to the upper end of the back cover, the end of the connecting block away from the back cover is rotatably connected to a rotating ring, the end of the rotating ring away from the back cover is installed with a fixed ring, and an elastic sheet is fixedly connected to the middle position of the fixed ring. In this millimeter wave radar assembly, the position of the back cover is sealed by an elastic sheet. When the volume of air in the radar body expands or contracts due to heating or cooling, the elastic sheet protrudes in the direction away from the radar body or is recessed in the direction of the radar body, thereby balancing the air pressure between the radar body and the outside. Since there is no microporous structure on the elastic sheet, it is more difficult for gas and water to penetrate into the radar body, and the performance of the radar body is not easily affected.

Description

Technical Field

[0001] The present invention relates to the field of radar technology, and in particular to a millimeter wave radar component. Background Art

[0002] Millimeter-wave radar is a radio measurement system based on the millimeter-wave frequency band. Millimeter-wave radar transmits millimeter waves through the antenna and captures the signal reflected by the target. After signal comparison and processing, it can accurately classify and identify the target. It has the characteristics of wide frequency band, short wavelength, and large atmospheric propagation loss. Among them, millimeter-wave radar has a wide range of applications in the automotive field, especially in autonomous driving technology. It plays a key role. It can be used to realize adaptive cruise control and help the vehicle automatically adjust the driving speed according to the road conditions ahead. At the same time, it is also used in anti-collision systems to effectively improve driving safety by real-time monitoring of surrounding obstacles.

[0003] As in the prior art, the patent with the patent authorization announcement number CN110082767B discloses a millimeter wave radar assembly, which includes: a fixing frame and a radar body; the radar body includes a shell, and the opposite sides of the shell are respectively provided with a rotating shaft; the fixing frame includes a bottom plate, and a clip and two holding walls are respectively provided from the bottom plate to one side thereof, and the clip and the two holding walls are respectively located at the opposite sides of the bottom plate; a guide groove is extended from the end of the holding wall to the holding wall body, and the rotating shaft enters from the guide groove and is rotatably installed at the extension limit position of the guide groove; the shell is provided with a locking part that is locked with the clip, and the shell rotates toward one side of the clip to make the locking part locked with the clip, so as to install the radar body on the fixing frame. This millimeter wave radar assembly can quickly disassemble or install the radar body, making the millimeter wave radar product easy to disassemble or install.

[0004] Although the millimeter wave radar assembly in the above patent can quickly disassemble or install the radar body, making the millimeter wave radar product easy to disassemble or install, it still has certain defects:

[0005] In order to ensure the balance of air pressure inside and outside the millimeter-wave radar component and prevent structural damage or performance degradation caused by air pressure differences, pressure balance holes are usually designed on its outer shell. At the same time, in order to prevent external moisture, dust and other pollutants from invading the interior of the radar and protect precision components from damage, these pressure balance holes are equipped with a special membrane (this membrane is called a breathable membrane or a pressure-balanced waterproof membrane). Most of these breathable membranes are designed with a microporous structure. The size of the micropores is small enough to effectively block the invasion of liquid water and most dust, while ensuring the free flow of gas molecules to achieve the purpose of air pressure balance. Although the breathable membrane has a certain waterproof level, it allows gas molecules to pass through, which means that gaseous water (such as water vapor in the air) may penetrate into the interior of the radar. Over time, the electronic components inside the radar may be affected by moisture, resulting in circuit short circuits or performance degradation. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a millimeter wave radar component to solve the problems raised in the background technology, making it more difficult for gaseous water (such as water vapor in the air) to penetrate into the radar body.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a millimeter-wave radar component, comprising a radar body, a back cover is installed on the back side of the radar body, an air nozzle is fixedly connected to the lower end of the back cover, and the air nozzle is connected to the interior of the radar body, a connecting block is fixedly connected to the upper end of the back cover, an end of the connecting block away from the back cover is rotatably connected to a rotating ring, an end of the rotating ring away from the back cover is installed with a fixing ring, and an elastic sheet is fixedly connected to the middle position of the fixing ring.

[0008] Furthermore, a plurality of telescopic components are fixedly connected to one end of the rotating ring away from the fixed ring, a first sieve plate is fixedly connected to one end of the telescopic component away from the rotating ring, a second sieve plate is rotatably connected to a side of the first sieve plate away from the rotating ring, four equally distributed sliders are fixedly connected to a circumferential side of the second sieve plate away from a side of the first sieve plate, an exhaust groove is provided on the slider close to the air nozzle, an exhaust hole is provided on one side of the rear cover, a sealing cover is threadedly connected to one end of the exhaust hole away from the connecting block, four limit blocks matching the sliders are fixedly connected to the inner wall of the connecting block, and arc-shaped through grooves with staggered distribution are provided on the first sieve plate and the second sieve plate.

[0009] Furthermore, a rotating groove is provided on the peripheral side of the first sieve plate close to the second sieve plate, a rotating block matching the rotating groove is fixedly connected to the side of the second sieve plate close to the first sieve plate, and a sealing gasket is fixedly connected to the side of the first sieve plate close to the second sieve plate.

[0010] Furthermore, the telescopic assembly includes a connecting rod, a sleeve and an elastic member, the connecting rod is fixedly connected to the rotating ring, the end of the connecting rod away from the rotating ring is sleeved with a sleeve slidably connected to the connecting rod, the end of the sleeve away from the connecting rod is fixedly connected to the first screen plate, and an elastic member is sleeved in the middle position of the connecting rod and the sleeve.

[0011] Furthermore, the upper and lower ends of the outer wall of one end of the connecting block away from the fixed ring are fixedly connected to positioning blocks, and the end of the rotating ring away from the fixed ring is fixedly connected to two equidistantly distributed anti-slip blocks, the anti-slip blocks match the positioning blocks, and both ends of the anti-slip blocks are fixedly connected to magnetic blocks.

[0012] Furthermore, four equally spaced slots are provided on the circumference of the fixed ring, and elastic blocks are clamped inside the slots, and the elastic blocks are fixedly connected to the rotating ring.

[0013] Furthermore, a grid plate is fixedly connected to the inner wall of the fixing ring at one end away from the rear cover.

[0014] Furthermore, a first sealing ring is fixedly connected to a surface of the rotating ring close to the connecting block, and a second sealing ring is fixedly connected to a surface of the rotating ring close to the fixed ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This type of millimeter-wave radar component seals the position of the back cover with an elastic sheet. When the air volume in the radar body expands or contracts due to heating or cooling, the elastic sheet protrudes away from the radar body or sinks toward the radar body, thereby balancing the air pressure between the radar body and the outside. At the same time, since there is no microporous structure on the elastic sheet, gas water (such as water vapor in the air) is less likely to penetrate into the radar body, and the performance of the radar body is not easily affected.

[0017] 2. For this type of millimeter-wave radar component, after the radar body is assembled, the ordinary air inside the radar body can be extracted through the air nozzle, and then nitrogen can be filled into the radar body. Since nitrogen has certain insulating properties and is an inert gas, it is not easy to react with other substances and can effectively prevent the flow of current. Therefore, after the radar body is filled with nitrogen, the circuit board in the radar body can be insulated and protected, making the circuit board in the radar body less likely to be corroded and damaged.

[0018] 3. For this type of millimeter-wave radar assembly, before nitrogen is filled into the radar body through the air nozzle, the sealing cover can be removed first, and the rotating ring can be turned to stagger the first sieve plate and the second sieve plate, thereby achieving a sealing effect. During the inflation process, if the air pressure in the radar body has been balanced with the external air pressure (that is, when the air pressure in the radar body is a standard atmospheric pressure), then nitrogen will continue to be filled into the radar body. The nitrogen will push the second sieve plate to move, so that the exhaust groove is aligned with the exhaust hole. At this time, the excess nitrogen will be discharged from the exhaust hole to avoid excessive air pressure in the radar body, which will cause damage to the electrical components in the radar body. When nitrogen is discharged from the exhaust hole, the operator can more easily detect that the radar body is full of nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the expansion of part of the structure of the present invention;

[0021] Figure 3 A partial cross-sectional view of the back cover of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the fixing ring of the present invention;

[0023] Figure 5 It is a schematic diagram of the connection structure between the rotating ring and the first screen plate of the present invention;

[0024] Figure 6 It is a partial cross-sectional view of the rotating ring of the present invention;

[0025] Figure 7 For the present invention Figure 6 A schematic diagram of the local enlarged structure at point A in the middle;

[0026] Figure 8 It is a schematic diagram of the split structure of the first sieve plate and the second sieve plate of the present invention;

[0027] Fig. 9 For the present invention Figure 8 A schematic diagram of the local enlarged structure at B in the middle;

[0028] Fig.10 It is a partial cross-sectional view of the connecting rod and the sleeve of the present invention.

[0029] In the figure: 1. radar body; 101. back cover; 2. air nozzle; 3. connecting block; 4. exhaust hole; 5. sealing cover; 6. positioning block; 7. limiting block; 8. rotating ring; 9. connecting rod; 10. sleeve; 11. elastic member; 12. first sieve plate; 13. sealing gasket; 14. second sieve plate; 15. rotating groove; 16. rotating block; 17. slider; 18. exhaust groove; 19. first sealing ring; 20. second sealing ring; 21. anti-slip block; 22. magnetic block; 23. elastic clamping block; 24. fixing ring; 25. clamping groove; 26. elastic sheet; 27. grid plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] See also Figures 1 to 10 A millimeter wave radar component includes a radar body 1, a back cover 101 is installed on the back side of the radar body 1, an air nozzle 2 is fixedly connected to the lower end of the back cover 101, the air nozzle 2 is connected to the inside of the radar body 1, a connecting block 3 is fixedly connected to the upper end of the back cover 101, an end of the connecting block 3 away from the back cover 101 is rotatably connected to a rotating ring 8, an end of the rotating ring 8 away from the back cover 101 is installed with a fixing ring 24, and an elastic sheet 26 is fixedly connected to the middle position of the fixing ring 24.

[0032] The millimeter-wave radar assembly in the present invention seals the position of the back cover 101 through the elastic sheet 26. When the temperature in the radar body 1 increases or decreases, the air in the radar body 1 will expand or contract, causing the air pressure inside the radar body 1 to increase or decrease. At this time, the elastic sheet 26 will be pushed by the air pressure, thereby protruding in the direction away from the radar body 1 or recessed in the direction of the radar body 1, thereby expanding or shrinking the space inside the radar body 1, reducing or increasing the air pressure inside the radar body 1, and balancing the air pressure between the radar body 1 and the outside. At the same time, since there is no microporous structure on the elastic sheet 26, gas water (such as water vapor in the air) is not easy to penetrate into the radar body 1, and the performance of the radar body 1 is not easily affected. In addition, the structure of the radar body 1 and the back cover 101 in the present invention is similar to the prior art, and a millimeter-wave radar assembly structure disclosed in the patent with patent authorization announcement number CN110082767B, so it will not be elaborated here.

[0033] As a preferred technical solution of the present invention, a plurality of telescopic components are fixedly connected to one end of the rotating ring 8 away from the fixed ring 24, a first sieve plate 12 is fixedly connected to one end of the telescopic component away from the rotating ring 8, a second sieve plate 14 is rotatably connected to one side of the first sieve plate 12 away from the rotating ring 8, four equally distributed sliders 17 are fixedly connected to the circumferential side of the second sieve plate 14 away from one side of the first sieve plate 12, an exhaust groove 18 is provided on the slider 17 close to the air nozzle 2, an exhaust hole 4 is provided on one side of the rear cover 101, a sealing cover 5 is threadedly connected to one end of the exhaust hole 4 away from the connecting block 3, four limit blocks 7 matching the sliders 17 are fixedly connected to the inner wall of the connecting block 3, and arc-shaped through grooves with staggered distribution are provided on the first sieve plate 12 and the second sieve plate 14.

[0034] Specifically, after the radar body 1 is assembled, the ordinary air inside the radar body 1 can be extracted through the air nozzle 2, and then nitrogen can be filled into the radar body 1. Since nitrogen has certain insulation properties and is an inert gas, it is not easy to react with other substances and can effectively prevent the flow of current. Therefore, after the radar body 1 is filled with nitrogen, the circuit board in the radar body 1 can be insulated and protected, so that the circuit board in the radar body 1 is not easily corroded and damaged. Before nitrogen is filled into the radar body 1 through the air nozzle 2, the sealing cover 5 can be removed first, and the rotating ring 8 can be turned to displace the first sieve plate 12 and the second sieve plate 14. The displaced second sieve plate 14 will block the arc-shaped through groove of the first sieve plate 12, thereby forming Sealing effect: During the process of filling with nitrogen, if the air pressure in the radar main body 1 has been balanced with the external air pressure (that is, when the air pressure in the radar main body 1 is a standard atmospheric pressure), then nitrogen will continue to be filled into the radar main body 1. The thrust of the telescopic assembly is not enough to offset the thrust of the air pressure inside the radar main body 1, and the nitrogen will push the second sieve plate 14 to move. The second sieve plate 14 will drive the slider 17 to move, so that the exhaust groove 18 is aligned with the exhaust hole 4. At this time, the excess nitrogen will be discharged from the exhaust hole 4 to avoid excessive air pressure in the radar main body 1, which will cause damage to the electrical components in the radar main body 1. In addition, nitrogen will form an airflow when it is discharged from the exhaust hole 4, which is also convenient for the operator to notice that the inside of the radar main body 1 is full of nitrogen.

[0035] As a preferred technical solution of the present invention, a rotating groove 15 is opened on the circumferential side of the first sieve plate 12 close to the second sieve plate 14, a rotating block 16 matching the rotating groove 15 is fixedly connected to the side of the second sieve plate 14 close to the first sieve plate 12, and a sealing gasket 13 is fixedly connected to the side of the first sieve plate 12 close to the second sieve plate 14.

[0036] Specifically, the first sieve plate 12 and the second sieve plate 14 are connected by the rotating groove 15 and the rotating block 16, and the connection is more tightly. At the same time, the gap between the first sieve plate 12 and the second sieve plate 14 is sealed by the sealing gasket 13 to prevent nitrogen from flowing from the gap to between the elastic sheet 26 and the first sieve plate 12 when nitrogen is filled into the radar body 1.

[0037] As a preferred technical solution of the present invention, the telescopic assembly includes a connecting rod 9, a sleeve 10 and an elastic member 11. The connecting rod 9 is fixedly connected to the rotating ring 8. The end of the connecting rod 9 away from the rotating ring 8 is sleeved with the sleeve 10 slidably connected to the connecting rod 9. The end of the sleeve 10 away from the connecting rod 9 is fixedly connected to the first screen plate 12. The elastic member 11 is sleeved in the middle position between the connecting rod 9 and the sleeve 10.

[0038] Specifically, the first sieve plate 12 is connected to the rotating ring 8 through a telescopic assembly, so that the first sieve plate 12 can rotate with the rotating ring 8 and slide together with the second sieve plate 14 toward or away from the radar body 1 .

[0039] As a preferred technical solution of the present invention, the upper and lower ends of the outer wall of the connecting block 3 away from the fixed ring 24 are fixedly connected with a positioning block 6, and the end of the rotating ring 8 away from the fixed ring 24 is fixedly connected with two equidistantly distributed anti-slip blocks 21, the anti-slip blocks 21 match the positioning block 6, and both ends of the anti-slip blocks 21 are fixedly connected with magnetic blocks 22.

[0040] Specifically, before the first sieve plate 12 and the second sieve plate 14 are misaligned and after the first sieve plate 12 and the second sieve plate 14 are misaligned, one of the magnetic blocks 22 at both ends of the anti-slip block 21 will always engage with one of the two positioning blocks 6, thereby completing the fixed restriction on the rotating ring 8 and preventing the rotating ring 8 from rotating on its own.

[0041] As a preferred technical solution of the present invention, four equally spaced slots 25 are provided on the circumference of the fixed ring 24 , and elastic blocks 23 are clamped inside the slots 25 , and the elastic blocks 23 are fixedly connected to the rotating ring 8 .

[0042] Specifically, since the elastic sheet 26 is fixed on the fixed ring 24, and the fixed ring 24 is installed on the rotating ring 8 through the slot 25 and the elastic block 23, after the elastic sheet 26 is damaged, the elastic block 23 can be opened first, the original fixed ring 24 can be removed, and then a new fixed ring 24 can be installed, so that the replacement of the elastic sheet 26 is simpler, more convenient and easy to operate.

[0043] As a preferred technical solution of the present invention, a grid plate 27 is fixedly connected to the inner wall of the fixing ring 24 at one end away from the rear cover 101 .

[0044] Specifically, the elastic sheet 26 is protected by the grid plate 27 to prevent the elastic sheet 26 from being punctured by sharp objects (such as screws on a car or burrs on a mounting frame) when it protrudes in a direction away from the radar body 1, causing the elastic sheet 26 to lose its waterproof and dustproof effect.

[0045] As a preferred technical solution of the present invention, a first sealing ring 19 is fixedly connected to a surface of the rotating ring 8 close to the connecting block 3 , and a second sealing ring 20 is fixedly connected to a surface of the rotating ring 8 close to the fixed ring 24 .

[0046] Specifically, the first sealing ring 19 can enhance the sealing effect between the rotating ring 8 and the connecting block 3, and at the same time, the second sealing ring 20 can enhance the sealing effect between the rotating ring 8 and the fixed ring 24, thereby reducing the probability of gas exchange between the inside and outside of the radar body 1, making it more difficult for gas water (such as water vapor in the air) to penetrate into the radar body 1.

[0047] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A millimeter wave radar assembly, comprising a radar body (1), a back cover (101) being installed on the back side of the radar body (1), characterized in that: The lower end of the rear cover (101) is fixedly connected to an air nozzle (2), the air nozzle (2) is connected to the interior of the radar body (1), the upper end of the rear cover (101) is fixedly connected to a connecting block (3), one end of the connecting block (3) away from the rear cover (101) is rotatably connected to a rotating ring (8), one end of the rotating ring (8) away from the rear cover (101) is mounted with a fixing ring (24), and an elastic sheet (26) is fixedly connected to the middle position of the fixing ring (24); A plurality of telescopic components are fixedly connected to one end of the rotating ring (8) away from the fixed ring (24); a first sieve plate (12) is fixedly connected to one end of the telescopic component away from the rotating ring (8); a second sieve plate (14) is rotatably connected to one side of the first sieve plate (12) away from the rotating ring (8); four equally spaced sliders (17) are fixedly connected to one side of the second sieve plate (14) away from the first sieve plate (12); an exhaust groove (18) is provided on the slider (17) close to the air nozzle (2); an exhaust hole (4) is provided on one side of the rear cover (101); a sealing cover (5) is threadedly connected to one end of the exhaust hole (4) away from the connecting block (3); four limit blocks (7) matching the sliders (17) are fixedly connected to the inner wall of the connecting block (3); and arc-shaped through grooves with staggered distribution are provided on both the first sieve plate (12) and the second sieve plate (14); The telescopic assembly comprises a connecting rod (9), a sleeve (10) and an elastic member (11); the connecting rod (9) is fixedly connected to the rotating ring (8); an end of the connecting rod (9) away from the rotating ring (8) is sleeved with a sleeve (10) slidably connected to the connecting rod (9); an end of the sleeve (10) away from the connecting rod (9) is fixedly connected to a first screen plate (12); and an elastic member (11) is sleeved between the connecting rod (9) and the sleeve (10).

2. A millimeter wave radar component according to claim 1, characterized in that: A rotating groove (15) is provided on the circumferential side of one side of the first sieve plate (12) close to the second sieve plate (14); a rotating block (16) matching the rotating groove (15) is fixedly connected to one side of the second sieve plate (14) close to the first sieve plate (12); and a sealing gasket (13) is fixedly connected to one side of the first sieve plate (12) close to the second sieve plate (14).

3. A millimeter wave radar assembly according to claim 1, characterized in that: The upper and lower ends of the outer wall of one end of the connection block (3) away from the fixed ring (24) are fixedly connected to a positioning block (6); the end of the rotating ring (8) away from the fixed ring (24) is fixedly connected to two equidistantly distributed anti-slip blocks (21); the anti-slip blocks (21) match the positioning block (6); and both ends of the anti-slip blocks (21) are fixedly connected to magnetic blocks (22).

4. The millimeter wave radar component according to claim 1, characterized in that: Four equally spaced slots (25) are provided on the circumference of the fixed ring (24), and elastic blocks (23) are clamped inside the slots (25), and the elastic blocks (23) are fixedly connected to the rotating ring (8).

5. The millimeter wave radar component according to claim 1, characterized in that: A grid plate (27) is fixedly connected to the inner wall of the fixing ring (24) at one end away from the rear cover (101).

6. The millimeter wave radar component according to claim 1, characterized in that: A first sealing ring (19) is fixedly connected to a surface of the rotating ring (8) close to the connecting block (3), and a second sealing ring (20) is fixedly connected to a surface of the rotating ring (8) close to the fixed ring (24).

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