Vehicle-mounted millimeter wave door radar structure

Abstract

The utility model discloses a vehicle-mounted millimeter wave door radar structure, which belongs to the technical field of millimeter wave radars, and comprises a shell, an antenna housing, a first circuit board assembly and a second circuit board assembly, the shell is matched with the antenna housing, the top of the shell is welded with the antenna housing, and the second circuit board assembly is welded with the antenna housing. A first circuit board assembly and a second circuit board assembly are embedded in the shell, the first circuit board assembly is horizontally arranged, and the second circuit board assembly is vertically arranged at the edge of the left side of the bottom of the first circuit board assembly. According to the vehicle-mounted millimeter wave door radar, the first circuit board assembly and the second circuit board assembly are designed to be perpendicular to each other, the maximum coverage of the external environment when a vehicle door is opened and closed is achieved through the FOV field angle, the vehicle door can be opened and closed more safely and reliably, and high performance, high stability and high reliability of the vehicle-mounted millimeter wave door radar are achieved; air pressure inside and outside the shell can be balanced, and shell deformation or damage caused by too large air pressure difference is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of millimeter wave radars, in particular to a vehicle-mounted millimeter wave gate radar structure. Background Art

[0002] With the rapid development of intelligent automobile technology, the application of vehicle-mounted millimeter-wave radar in door safety systems is becoming increasingly popular. As a sensor that can adapt to all climate environments, millimeter-wave radar plays a vital role in the field of autonomous driving. Vehicle-mounted millimeter-wave door radar also plays a key role and its importance cannot be ignored. Millimeter-wave radar uses electromagnetic waves that propagate in the air at a speed much higher than sound waves, and can achieve accurate perception of the vehicle's surroundings. In the door safety system, millimeter-wave radar is mainly responsible for detecting whether there are obstacles around the vehicle, as well as information such as the distance and speed of the obstacles. This information will be transmitted to the vehicle-mounted control system in real time to adjust the door's opening and closing status in time to ensure passenger safety and vehicle stability.

[0003] For example, Chinese patent CN201921044279.8 discloses a vehicle-mounted millimeter-wave radar structure that is fixedly connected to a vehicle through a number of fixing device structures, thereby performing low-power, high-precision detection of a designated area around the vehicle. It has the characteristics of small size and light weight, and can adapt to harsh working environments.

[0004] However, most of the existing vehicle-mounted millimeter-wave door radar antenna modules are single-circuit board structures. Due to factors such as space limitations and signal transmission loss, antenna modules with single-circuit board structures are often unable to achieve comprehensive coverage of the environment outside the door. Especially during the opening and closing process of the door, due to the limitation of FOV, there will be blind spots in the radar's detection range, and it is impossible to accurately perceive the situation outside the door, thereby increasing the risk of collision.

[0005] Based on this, the utility model designs a vehicle-mounted millimeter-wave gate radar structure to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a vehicle-mounted millimeter-wave gate radar structure.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A vehicle-mounted millimeter-wave gate radar structure comprises a shell, an antenna cover, a first circuit board assembly and a second circuit board assembly, wherein the shell is adapted to the antenna cover, the antenna cover is welded on the top of the shell, and the first circuit board assembly and the second circuit board assembly are embedded in the shell, wherein the first circuit board assembly is horizontally arranged, and the second circuit board assembly is vertically arranged at the left edge of the bottom of the first circuit board assembly;

[0009] The shell comprises a bottom shell plastic part, and the front and rear sides of the left end of the inner cavity of the bottom shell plastic part are fixedly connected with a limit plate, and the limit plate is provided with a mounting groove, and the second circuit board assembly is snap-connected in the mounting groove.

[0010] Furthermore, the housing further comprises a bottom shell die-cast aluminum part and a bottom shell fisheye terminal conductive part, the bottom shell die-cast aluminum part is fixedly connected to the right side of the inner cavity of the bottom shell plastic part, the right side of the bottom shell die-cast aluminum part is fixedly connected to the bottom shell fisheye terminal conductive part, and the bottom shell plastic part, the bottom shell die-cast aluminum part and the bottom shell fisheye terminal conductive part are formed by a mold insert injection molding process;

[0011] Furthermore, a welding rib is fixedly connected to the edge of the top of the bottom shell plastic part, and a wave-transmitting surface is arranged on the left side of the bottom shell plastic part;

[0012] Furthermore, a vent hole is provided on the front side of the inner cavity of the bottom shell plastic part, and a vent film is attached to the inner side of the vent hole;

[0013] Furthermore, an overflow groove is provided at the edge of the bottom of the antenna cover, a welding rib is embedded in the overflow groove, and the front and rear sides of the bottom of the antenna cover are fixedly connected to the limiting boss, and the bottom of the limiting boss abuts against the top of the first circuit board assembly;

[0014] Furthermore, the first circuit board assembly and the second circuit board assembly are both provided with an antenna module and a circuit module, a first connector is fixedly connected to the left side of the bottom of the first circuit board assembly, a second connector is fixedly connected to the top of the right side of the second circuit board assembly, the first connector is adapted to the second connector, and the first connector is plugged into the second connector;

[0015] Furthermore, a heat dissipation boss is fixedly connected to the top of the die-cast aluminum part of the bottom shell, and a heat dissipation gel is embedded between the top of the heat dissipation boss and the bottom of the first circuit board assembly;

[0016] Furthermore, a supporting surface is provided at the edge of the top of the die-cast aluminum part of the bottom shell, and a first circuit board assembly is arranged on the top of the supporting surface. The right side of the bottom of the first circuit board assembly is adapted to the fisheye terminal conductive part of the bottom shell, and the first circuit board assembly is plugged into the fisheye terminal conductive part of the bottom shell.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model arranges a shell, an antenna cover, a first circuit board assembly and a second circuit board assembly so that the first circuit board assembly and the second circuit board assembly are horizontally and vertically staggered, which effectively saves the overall space of the radar antenna, enables the radar antenna module to cover a wider detection range, reduces the possibility of blind spots, thereby improving the radar's perception of the environment outside the door and ensuring the safety of passengers. The bottom shell plastic parts, the bottom shell die-cast aluminum parts and the bottom shell fisheye terminal conductive parts are formed by the insert injection molding process, so that the entire shell structure is more stable and reliable, and the electromagnetic shielding performance is improved.

[0019] 2. The utility model provides a die-cast aluminum bottom shell, and utilizes its heat dissipation performance to quickly dissipate the heat of the first circuit board assembly, avoid performance degradation or damage, and ensure the stability and reliability of the radar. At the same time, with the cooperation of the heat dissipation boss and the heat dissipation gel, the heat dissipation effect is enhanced, so that the radar can work normally in a high temperature environment. The support surface design on the top of the die-cast aluminum bottom shell provides stable support for the first circuit board assembly, making the plug-in more stable and reliable.

[0020] 3. The utility model provides ventilation holes and attaches a breathable film in the ventilation holes, which can effectively balance the air pressure inside and outside the shell to avoid deformation or damage of the shell due to excessive pressure difference. At the same time, the breathable film can also prevent impurities such as moisture and dust from entering the shell, ensuring the normal operation and long life of the radar. This design takes into account the structural strength of the shell and the waterproof and dustproof functions, making the vehicle-mounted millimeter-wave gate radar structure more adaptable to various complex environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is an exploded structural diagram of a vehicle-mounted millimeter wave gate radar structure of the utility model;

[0023] Figure 2 A three-dimensional diagram of the structure of a vehicle-mounted millimeter-wave gate radar of the utility model;

[0024] Figure 3 A top view of a vehicle-mounted millimeter-wave gate radar structure of the utility model;

[0025] Figure 4 For along Figure 3 AA direction cross-sectional view;

[0026] Figure 5 For along Figure 3 BB direction cross-sectional view;

[0027] Figure 6 This is a structural schematic diagram of a shell in a vehicle-mounted millimeter-wave gate radar structure of the utility model;

[0028] Figure 7 It is a top view of a shell in a vehicle-mounted millimeter-wave gate radar structure of the utility model;

[0029] Figure 8 The utility model is a schematic structural diagram of a radome in a vehicle-mounted millimeter-wave gate radar structure.

[0030] The numbers in the figure represent:

[0031] 1. Shell; 11. Plastic part of bottom shell; 111. Limiting plate; 112. Mounting groove; 113. Welding rib; 114. Transparent surface; 115. Air vent; 12. Die-cast aluminum part of bottom shell; 121. Heat dissipation boss; 122. Support surface; 13. Fisheye terminal conductive part of bottom shell; 2. Antenna cover; 21. Overflow groove; 22. Limiting boss; 3. First circuit board assembly; 31. First connector; 4. Second circuit board assembly; 41. Second connector; 5. Breathable membrane; 6. Heat dissipation gel. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment 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.

[0033] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented according to the viewing direction of the exploded structure diagram.

[0034] Embodiment 1

[0035] In some embodiments, please refer to the attached instructions. Figure 1-8 A vehicle-mounted millimeter-wave gate radar structure includes a shell 1, a radome 2, a first circuit board assembly 3 and a second circuit board assembly 4, the shell 1 is adapted to the radome 2, the radome 2 is welded on the top of the shell 1, the first circuit board assembly 3 and the second circuit board assembly 4 are embedded in the shell 1, the first circuit board assembly 3 is horizontally arranged, and the second circuit board assembly 4 is vertically arranged at the left edge of the bottom of the first circuit board assembly 3;

[0036] The housing 1 includes a bottom shell plastic part 11, and the front and rear sides of the left end of the inner cavity of the bottom shell plastic part 11 are fixedly connected to a limit plate 111. The limit plate 111 is provided with a mounting groove 112, and the second circuit board assembly 4 is snap-connected in the mounting groove 112, so that the design value of the air spacing between the second circuit board assembly 4 and the wave-transmitting surface 114 is only related to the position size of the mounting groove 112, thereby reducing the tolerance accumulation caused by other sizes and improving the performance of the radar.

[0037] The first circuit board assembly 3 and the second circuit board assembly 4 are vertically connected and fixed in the entire sealed cavity through ingenious structural designs such as BTB, mounting groove 112, and limiting boss 22. The first circuit board assembly 3 and the second circuit board assembly 4 are vertically connected and fixed in the entire sealed cavity. The structural design of the first circuit board assembly 3 and the second circuit board assembly 4 is perpendicular to each other, and the FOV field of view angle is used to achieve maximum coverage of the external environment when opening and closing the vehicle door, so that the vehicle door can be opened and closed more safely and reliably.

[0038] Furthermore, the shell 1 also includes a bottom shell die-cast aluminum part 12 and a bottom shell fisheye terminal conductor 13. The bottom shell die-cast aluminum part 12 is fixedly connected to the right side of the inner cavity of the bottom shell plastic part 11. The right side of the bottom shell die-cast aluminum part 12 is fixedly connected with the bottom shell fisheye terminal conductor 13. The bottom shell plastic part 11, the bottom shell die-cast aluminum part 12 and the bottom shell fisheye terminal conductor 13 are formed by a mold insert injection molding process. The connection between the bottom shell die-cast aluminum part 12, the bottom shell fisheye terminal conductor 13 and the bottom shell plastic part 11 adopts a precise insert injection molding process to ensure the stability and sealing of the connection. By arranging the bottom shell fisheye terminal conductor 13 on the right side of the bottom shell die-cast aluminum part 12, not only the stability of the structure is enhanced, but also the electromagnetic performance is optimized and signal interference is reduced.

[0039] Furthermore, a welding rib 113 is fixedly connected to the edge of the top of the bottom shell plastic part 11. The welding rib 113 on the top of the bottom shell plastic part 11 forms a sealed cavity through laser welding with the antenna cover 2. The overflow groove 21 prevents glue from overflowing during welding, thereby improving the appearance quality of the radar. A wave-transmitting surface 114 is arranged on the left side of the bottom shell plastic part 11.

[0040] Furthermore, a ventilation hole 115 is provided on the front side of the inner cavity of the bottom shell plastic part 11, and a breathable membrane 5 is attached to the ventilation hole 115, which balances the air pressure inside and outside the equipment and enhances the heat dissipation of the product. At the same time, the sealing integrity of the product ensures the air circulation inside and outside the shell 1, prevents the internal pressure from being too high, and effectively prevents the entry of water and dust.

[0041] Furthermore, an overflow groove 21 is opened at the edge of the bottom of the antenna cover 2, and a welding rib 113 is embedded inside the overflow groove 21. The design of the antenna cover 2 fully considers the transmission characteristics of electromagnetic waves. Its material and shape can effectively reduce signal attenuation and improve the detection range and accuracy of the radar. At the same time, the setting of the overflow groove 21 and the welding rib 113 opened at the edge of the bottom of the antenna cover 2 not only ensures the stability of the welding, but also avoids the overflow problem that may occur during the welding process. The front and rear sides of the bottom of the antenna cover 2 are fixedly connected with the limiting boss 22, and the bottom of the limiting boss 22 is abutted against the top of the first circuit board assembly 3. The two limiting bosses 22 make the design value of the air spacing between the first circuit board assembly 3 and the antenna cover 2 only related to the height dimension of the limiting boss 22, reducing the tolerance accumulation caused by other dimensions and improving the performance of the radar.

[0042] Furthermore, the first circuit board assembly 3 and the second circuit board assembly 4 are both provided with an antenna module and a circuit module. The first connector 31 is fixedly connected to the left side of the bottom of the first circuit board assembly 3, and the second connector 41 is fixedly connected to the top of the right side of the second circuit board assembly 4. The first connector 31 is adapted to the second connector 41, and the first connector 31 is plugged into the second connector 41. The first connector 31 and the second connector 41 are plugged together to realize the connection between the first circuit board assembly 3 and the second circuit board assembly 4. The antenna module and the circuit module in the first circuit board assembly 3 and the second circuit board assembly 4 are carefully designed and optimized to ensure the best signal transmission and processing effects. The antenna module is responsible for receiving and transmitting radar signals, while the circuit module is responsible for signal processing and control. The coordinated work between the two enables the entire radar system to accurately and quickly identify targets and respond accordingly.

[0043] Furthermore, a heat dissipation boss 121 is fixedly connected to the top of the bottom shell die-cast aluminum part 12, and a heat dissipation gel 6 is embedded between the top of the heat dissipation boss 121 and the bottom of the first circuit board assembly 3. Through the contact with the heat dissipation gel 6, the heat of the chip is evenly dispersed to the bottom shell die-cast aluminum part 12. The structure of the bottom shell die-cast aluminum part 12 improves the speed of heat dissipation. The bottom shell die-cast aluminum part 12 serves as the main path of heat conduction, and can quickly transfer the heat generated by the first circuit board assembly 3 to the bottom shell die-cast aluminum part 12 through the heat dissipation boss 121 and the heat dissipation gel 6, and then dissipate it to the external environment through the heat dissipation structure of the bottom shell plastic part 11, which effectively reduces the operating temperature of the circuit board and improves its stability and service life. At the same time, the structure of the bottom shell die-cast aluminum part 12 is conducive to improving the flatness of the shell 1.

[0044] Furthermore, a supporting surface 122 is provided at the edge of the top of the bottom shell die-cast aluminum part 12, and a first circuit board assembly 3 is arranged on the top of the supporting surface 122. The right side of the bottom of the first circuit board assembly 3 is adapted to the bottom shell fisheye terminal conductive part 13, and the first circuit board assembly 3 is plugged into the bottom shell fisheye terminal conductive part 13. The bottom shell fisheye terminal conductive part 13 is aligned with the conductive hole on the first circuit board assembly 3, and appropriate pressure is applied to squeeze the elastic arm of the bottom shell fisheye terminal conductive part 13 and elastically shrink, ensuring that the bottom shell fisheye terminal conductive part 13 is smoothly inserted into the conductive hole and forms a good electrical connection with the first circuit board assembly 3. At the same time, the supporting surface 122 of the bottom shell die-cast aluminum part 12 provides stable support, ensuring that the position of the first circuit board assembly 3 in the shell 1 is stable and reliable, which not only simplifies the assembly process and improves production efficiency, but also ensures the reliability and stability of the electrical connection, providing a solid guarantee for the stable operation of the radar.

[0045] Working principle of the utility model: during the working process of the radar, the first circuit board assembly 3 and the second circuit board assembly 4 are vertically connected and fixed in the entire sealed cavity through structures such as BTB, mounting groove 112, and limiting boss 22. The maximum coverage of the external environment when opening and closing the door is achieved through the FOV field of view, and the door can be opened and closed more safely and reliably. The antenna module in the first circuit board assembly 3 and the second circuit board assembly 4 is responsible for receiving and transmitting radar signals, and the circuit module is responsible for signal processing and control. The design of the antenna cover 2 optimizes the transmission characteristics of electromagnetic waves, reduces signal attenuation, and improves the detection range and accuracy of the radar. At the same time, the bottom shell die-cast aluminum part 12 and the bottom shell fisheye terminal guide The insert injection molding process of the electrical component 13 and the bottom shell plastic component 11 ensures the stability and sealing of the connection, optimizes the electromagnetic performance, and reduces signal interference. The setting of the heat dissipation boss 121 and the heat dissipation gel 6 effectively reduces the operating temperature of the circuit board and improves its stability and service life. During the assembly process, the reliability and stability of the electrical connection are achieved through the plug-in connection between the bottom shell fisheye terminal conductive component 13 and the first circuit board assembly 3. In addition, the breathable membrane 5 in the air hole 115 balances the air pressure inside and outside the equipment, enhances the heat dissipation of the product, and ensures the sealing integrity of the product. The entire radar system achieves high-performance and high-reliability working effects through these carefully designed structures and components.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-mounted millimeter-wave gate radar structure, comprising a housing (1), a radome (2), a first circuit board assembly (3) and a second circuit board assembly (4), characterized in that: The shell (1) is adapted to the antenna cover (2); the antenna cover (2) is welded to the top of the shell (1); a first circuit board assembly (3) and a second circuit board assembly (4) are embedded in the shell (1); the first circuit board assembly (3) is arranged horizontally, and the second circuit board assembly (4) is arranged vertically at the left edge of the bottom of the first circuit board assembly (3); The housing (1) comprises a bottom shell plastic part (11), and the front and rear sides of the left end of the inner cavity of the bottom shell plastic part (11) are fixedly connected to a limit plate (111), and the limit plate (111) is provided with a mounting groove (112), and a second circuit board assembly (4) is snap-connected in the mounting groove (112).

2. The vehicle-mounted millimeter-wave gate radar structure according to claim 1, characterized in that: The housing (1) further comprises a bottom shell die-cast aluminum part (12) and a bottom shell fisheye terminal conductive part (13); the bottom shell die-cast aluminum part (12) is fixedly connected to the right side of the inner cavity of the bottom shell plastic part (11); the right side of the bottom shell die-cast aluminum part (12) is fixedly connected to the bottom shell fisheye terminal conductive part (13); the bottom shell plastic part (11), the bottom shell die-cast aluminum part (12) and the bottom shell fisheye terminal conductive part (13) are formed by a mold insert injection molding process.

3. The vehicle-mounted millimeter-wave gate radar structure according to claim 2, characterized in that: A welding rib (113) is fixedly connected to the edge of the top of the bottom shell plastic part (11), and a wave-transmitting surface (114) is arranged on the left side of the bottom shell plastic part (11).

4. The vehicle-mounted millimeter-wave gate radar structure according to claim 3 is characterized in that: A vent hole (115) is provided on the front side of the inner cavity of the bottom shell plastic part (11), and a vent film (5) is attached to the inner side of the vent hole (115).

5. The vehicle-mounted millimeter-wave gate radar structure according to claim 4, characterized in that: An overflow groove (21) is provided at the edge of the bottom of the antenna cover (2), and a welding rib (113) is embedded in the overflow groove (21). The front and rear sides of the bottom of the antenna cover (2) are fixedly connected to a limiting boss (22), and the bottom of the limiting boss (22) abuts against the top of the first circuit board assembly (3).

6. The vehicle-mounted millimeter-wave gate radar structure according to claim 1, characterized in that: The first circuit board assembly (3) and the second circuit board assembly (4) are both provided with an antenna module and a circuit module; a first connector (31) is fixedly connected to the left side of the bottom of the first circuit board assembly (3); a second connector (41) is fixedly connected to the top of the right side of the second circuit board assembly (4); the first connector (31) is adapted to the second connector (41), and the first connector (31) is plugged into the second connector (41).

7. The vehicle-mounted millimeter-wave gate radar structure according to claim 2, characterized in that: A heat dissipation boss (121) is fixedly connected to the top of the bottom shell die-cast aluminum part (12), and a heat dissipation gel (6) is embedded between the top of the heat dissipation boss (121) and the bottom of the first circuit board assembly (3).

8. The vehicle-mounted millimeter-wave gate radar structure according to claim 7, characterized in that: A support surface (122) is provided at the edge of the top of the bottom shell die-cast aluminum part (12), a first circuit board assembly (3) is arranged on the top of the support surface (122), the right side of the bottom of the first circuit board assembly (3) is adapted to the bottom shell fisheye terminal conductive part (13), and the first circuit board assembly (3) is plugged into the bottom shell fisheye terminal conductive part (13).

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