Millimeter wave radar and automobile

Abstract

This utility model discloses a millimeter-wave radar and an automobile, relating to the field of radar technology. The millimeter-wave radar includes a base plate, a first PCBA, and an antenna radome. The base plate has a first inclined boss formed upwards, and the first top surface of the first inclined boss is inclined to the base plate. The first PCBA includes a first circuit board and a first chip, which are fixedly installed on the top surface of the first inclined boss. The antenna radome covers the base plate and has an inclined surface formed corresponding to the first top surface of the first inclined boss. It includes a first terminal inside the antenna radome and a second terminal outside the antenna radome. The first terminal and the second terminal are respectively located in the middle of the side of the antenna radome. The first terminal is electrically connected to the first PCBA, and the second terminal is used to electrically connect to the outside.

Description

Technical Field

[0001] This utility model relates to the field of radar technology, and in particular to a millimeter-wave radar and an automobile. Background Technology

[0002] Currently, most millimeter-wave radar products with wide-area coverage (FOV≥180°) on the market are arranged with two PCB microstrip antennas, the PCBA is fixed on the metal base, the PCBA motherboard is soldered with connectors, and then wires are run out from the bottom of the radar.

[0003] However, existing technologies use wire harnesses to connect the radar and the vehicle for communication and power supply, with connectors at both ends of the harness. The radar's operating environment requires an IP67 or higher protection rating, and the bottom housing opening size must be based on the wire harness diameter and cannot be too large. Therefore, wire harness assembly can only involve assembling one type of connector first, then passing it through the bottom housing opening, and then assembling another type of connector; finally, adhesive is applied to seal the gap between the wire harness and the bottom housing. This process is cumbersome, involves numerous material transfers, and the wire harness is subject to bending and tensile stress. Long-term use can lead to the risk of internal wire core breakage and seal leakage. Utility Model Content

[0004] The main purpose of this utility model is to propose a millimeter-wave radar and automobile, which aims to reduce the number of product parts, simplify assembly, increase reliability, improve product yield, and reduce product cost.

[0005] To achieve the above objectives, the millimeter-wave radar proposed in this utility model includes: A base plate, wherein a first inclined protrusion is formed on the base plate, and the first top surface of the first inclined protrusion is inclined to the base plate; The first PCBA includes a first circuit board, a microstrip antenna and a first chip mounted on the first circuit board, wherein the first circuit board is fixedly mounted on the top surface of the first inclined boss. The radome covers the base plate and has an inclined surface corresponding to the first top surface. It includes a first terminal inside the radome and a second terminal outside the radome. The first terminal and the second terminal are respectively located in the middle of the side of the radome. The first terminal is electrically connected to the first PCBA, and the second terminal is used to electrically connect to the outside.

[0006] In one embodiment, the bottom plate is formed with a second inclined boss that is disposed opposite to the first inclined boss, and the first top surface is disposed away from the second top surface of the second inclined boss; The millimeter-wave radar also includes: The second PCBA, including a second circuit board and a second chip, is fixedly mounted on the top surface of the second inclined boss, and the second PCBA is electrically connected to the first PCBA.

[0007] In one embodiment, the bottom plate is formed with a second inclined boss that is disposed opposite to the first inclined boss, and the first top surface is disposed away from the second top surface of the second inclined boss; The plane containing the first top surface forms an angle θ1 with the plane containing the bottom plate, the plane containing the second top surface forms an angle θ2 with the plane containing the bottom plate, and the plane containing the inclined surface of the radome forms an angle θ3 with the plane containing the bottom plate, wherein θ1, θ2, and θ3 satisfy: 30°≤θ1≤60°, 30°≤θ2≤60°, 30°≤θ3≤60°.

[0008] In one embodiment, a groove is formed in the center of the first top surface.

[0009] In one embodiment, a first heat dissipation protrusion is provided on the bottom surface of the groove, and the top surface of the first heat dissipation protrusion abuts against the first chip.

[0010] In one embodiment, a thermally conductive coating is provided between the first heat dissipation boss and the first chip.

[0011] In one embodiment, the base plate is recessed with a glue-applying groove, which is arranged in a ring shape and surrounds the first inclined boss; The radome is fixedly installed in the glue-applying groove.

[0012] In one embodiment, the glue-applying tank is provided with a sealing coating.

[0013] In one embodiment, the base plate is further provided with at least one vent hole, and the antenna cover covers the vent hole.

[0014] This utility model also provides a car, the car including the above-mentioned millimeter-wave radar, the millimeter-wave radar including: A base plate, wherein a first inclined protrusion is formed on the base plate, and the first top surface is inclined to the base plate; The first PCBA (millimeter-wave generating assembly) includes a first circuit board, a microstrip antenna, and a first chip mounted on the first circuit board. The first circuit board is fixedly mounted on the top surface of the first inclined boss. The radome covers the base plate and has an inclined surface corresponding to the first top surface. It includes a first terminal inside the radome and a second terminal outside the radome. The first terminal and the second terminal are respectively located in the middle of the side of the radome. The first terminal is electrically connected to the first PCBA, and the second terminal is used to electrically connect to the outside.

[0015] In the technical solution of this utility model, the first top surface of the first inclined boss is inclined to the base plate, so that the millimeter-wave radar has a better transmission angle and a larger coverage area, ensuring that the radar antenna has a relatively balanced performance in front and to the side of the vehicle; by setting the first terminal inside the antenna cover and the second terminal outside the antenna cover, the number of connectors is reduced, there are fewer parts, the assembly is simpler, and the cost is lower. Moreover, the terminals are respectively located in the middle of the side of the antenna cover, which requires less vehicle installation position compared to setting them at the bottom, making it easier to maintain later and disassemble the connectors. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of an embodiment of the millimeter-wave radar provided by this utility model; Figure 2 for Figure 1 A schematic diagram of a mid-millimeter wave radar without a PCBA installed. Figure 3 for Figure 1 A schematic diagram of the structure of a mid-millimeter wave radar after the antenna cover is closed; Figure 4 for Figure 3 A schematic diagram of the structure of the radome from another perspective.

[0018] Explanation of icon numbers: 100. Millimeter-wave radar; 1. Base plate; 2. First inclined boss; 21. Groove; 22. First heat dissipation boss; 23. First top surface; 3. First PCBA; 31. First circuit board; 32. First chip; 4. Antenna cover; 41. First terminal; 42. Second terminal; 43. Inclined surface; 5. Second inclined boss; 51. Second heat dissipation boss; 52. Second top surface; 6. Second PCBA; 7. Glue groove; 8. Vent hole.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] This utility model proposes a millimeter-wave radar 100.

[0024] Please see Figure 1-3In one embodiment of this utility model, the millimeter-wave radar 100 includes a base plate 1, a first PCBA, and an antenna cover 4. The base plate 1 has a first inclined boss 2 formed upwards, and the first top surface 23 of the first inclined boss 2 is inclined to the base plate 1. The first PCBA includes a first circuit board 31 and a first chip 32, which are fixedly installed on the top surface of the first inclined boss 2. The antenna cover 4 covers the base plate 1 and has an inclined surface 43 formed corresponding to the first top surface 23 of the first inclined boss 2. It includes a first terminal 41 disposed inside the antenna cover 4 and a second terminal 42 disposed outside the antenna cover 4. The first terminal 41 and the second terminal 42 are respectively disposed in the middle of the side of the antenna cover 4, and the first terminal 41 is electrically connected to the first PCBA, and the second terminal 42 is used to electrically connect to the outside. It should be noted that PCBA is an abbreviation for Printed Circuit Board Assembly. It refers to the assembly of electronic components (such as chips, resistors, capacitors, etc.) onto a printed circuit board (PCB) and fixed by soldering or other methods to form a complete electronic assembly. The first chip 32 is responsible for generating millimeter-wave signals, and the microstrip antenna is used to transmit and receive millimeter-wave signals. After the first chip 32 generates a millimeter-wave signal, it transmits it through the microstrip antenna and receives the millimeter-wave signals reflected from the target. Finally, the first chip 32 converts the reflected signals back into millimeter-wave signals to detect the target.

[0025] The base plate 1 is the main support body of the millimeter-wave radar 100. In one embodiment, the base plate 1 is made of die-cast aluminum and is used to place and fix the other parts.

[0026] In order to enable the millimeter-wave radar 100 to have a better emission angle and a larger coverage area, the first top surface 23 is inclined to the bottom plate 1 to ensure that the radar antenna has a relatively balanced performance in front and to the side of the vehicle.

[0027] Among them, the radome 4 uses a medium that radar microwaves can penetrate. Specifically, it can be made of glass fiber reinforced polybutylene terephthalate (PBT-GF30). This material has a low loss factor and dielectric constant, which can reduce signal attenuation and improve transmission efficiency. Moreover, the coefficient of thermal expansion is reduced after glass fiber modification, making it suitable for high-temperature environments.

[0028] In addition, please see Figure 4By setting a first terminal 41 inside the antenna cover 4 and a second terminal 42 outside the antenna cover 4, respectively located in the middle of the side of the antenna cover 4, the connector can be connected to the middle of the millimeter-wave radar 100. Compared with setting it at the bottom, it has fewer requirements for vehicle installation position, facilitates later maintenance, and makes it easier to disassemble the connector.

[0029] The first terminal 41 is electrically connected to the first PCBA, and the second terminal 42 is used for electrical connection to an external connector. Specifically, the first terminal 41 is designed as a male connector port that matches an FFC connector. The second terminal 42 is used for electrical connection with an external connector. The second terminal 42 is designed with a pin connector, and its shape can be modified to adapt to standard connector female heads according to different brands of connectors. Furthermore, the antenna cover 4 and the wiring terminal can be integrally molded by injection molding to complete the connector molding and the covering of the connecting pins, which is fast, efficient, stable and reliable.

[0030] In the technical solution of this utility model, the first top surface 23 of the first inclined boss 2 is inclined to the bottom plate 1, so that the millimeter-wave radar 100 has a better transmission angle and a larger coverage range, ensuring that the radar antenna has no blind spots and full coverage on both sides of the vehicle; by setting the first terminal 41 inside the antenna cover 4 and the second terminal 42 outside the antenna cover 4, the number of connectors is reduced, there are fewer parts, the assembly is simpler, and the cost is lower. Moreover, the terminals are respectively located in the middle of the side of the antenna cover 4, which requires less vehicle installation position compared to setting them at the bottom, facilitates later maintenance, and makes it easier to disassemble the connectors.

[0031] It is understandable that if the first inclined protrusion 2 tilts only in one direction, the detection range of the millimeter-wave radar 100 in the direction away from the top surface of the first inclined protrusion 2 is relatively small. Therefore, in one embodiment of this utility model, the base plate 1 forms a second inclined protrusion 5 opposite to the first inclined protrusion 2, and the first top surface 23 is disposed away from the second top surface 52 of the second inclined protrusion 5. The millimeter-wave radar 100 also includes a second PCBA, which includes a second circuit board and a second chip, and is fixedly installed on the top surface of the second inclined protrusion 5. The second PCBA is electrically connected to the first PCBA. In this way, the millimeter-wave radar 100 can also transmit and receive radar in the direction away from the first inclined protrusion 2, thereby further increasing the coverage range and improving the detection effect.

[0032] In one embodiment of this utility model, the base plate 1 has a second inclined boss 5 formed upwards opposite to the first inclined boss 2, and the first top surface 23 is disposed away from the second top surface 52 of the second inclined boss 5; the angle between the first top surface 23 (or the extension line of the first top surface 23) and the base plate 1 is θ1, the angle between the second top surface 52 (or the extension line of the second top surface 52 of the second inclined boss 5) and the base plate 1 is θ2, and the angle between the inclined surface 43 of the radome 4 (or the extension line of the inclined surface 43 of the radome 4) and the base plate 1 is θ3, wherein θ1, θ2 and θ3 satisfy: 30°≤θ1≤60°, 30°≤θ2≤60°, 30°≤θ3≤60°. According to the actual specifications and dimensions of the vehicle, the installation position and the customer's product functional requirements, each of the angles can be adjusted within the range of 30°~60° to meet the detection range and detection distance of the millimeter-wave radar 100 in all directions, so that the radar antenna has a relatively balanced performance in all directions within the vehicle. Preferably, in one embodiment, θ1=θ2=θ3=40° to obtain better detection results.

[0033] Furthermore, in one embodiment of this utility model, a groove 21 is formed in the middle of the first top surface 23; it can be understood that the first PCBA is fixedly installed on the top surface of the groove 21 and covers the groove 21, so that the groove 21 and the first PCBA form a closed space, which can prevent external electromagnetic interference from entering, and also prevent the electromagnetic signals generated by the PCBA from leaking out, thereby ensuring that the microstrip antenna on the PCBA away from the direction of the groove 21 has good electromagnetic compatibility (EMC).

[0034] It is understandable that the first chip 32 generates a large amount of heat when converting electromagnetic signals and performing calculations. If this heat is not dissipated in time, it will affect the performance of the millimeter-wave radar 100. Therefore, in one embodiment of this utility model, a first heat dissipation protrusion 22 is provided on the bottom surface of the groove 21, and the top surface of the first heat dissipation protrusion 22 abuts against the first chip 32. In this way, the heat generated by the first chip 32 is conducted to the base plate 1 through the first heat dissipation protrusion 22, and then dissipated to the external environment through the outer surface of the base plate 1, thereby achieving cooling.

[0035] Furthermore, in one embodiment of this utility model, a thermally conductive coating is provided between the first heat dissipation protrusion 22 and the first chip 32, thereby increasing the thermal conductivity and improving the cooling effect. The thermally conductive coating can be silicone grease or thermally conductive gel, or other highly thermally conductive materials; this utility model does not limit the application to these materials.

[0036] Similarly, in one embodiment of this invention, a groove 21 can be formed in the middle of the second top surface 52 to achieve good electromagnetic compatibility for the second PCBA and its microstrip antenna. Furthermore, a second heat dissipation protrusion 51 can also be provided, and a thermally conductive coating can be provided between the second heat dissipation protrusion 51 and the second chip to improve the heat dissipation effect of the second chip.

[0037] It is understandable that dust and moisture entering the millimeter-wave radar 100 can cause problems such as short circuits and overheating. Therefore, in one embodiment of this utility model, the base plate 1 is recessed with a glue-applying groove 7, which is arranged in a ring and surrounds the first inclined protrusion 2; the antenna cover 4 is fixedly installed in the glue-applying groove 7. By installing the antenna cover 4 in the glue-applying groove 7, external impurities are less likely to directly enter the antenna cover 4, thereby protecting the internal equipment.

[0038] Furthermore, in one embodiment of this utility model, a sealing coating is provided in the glue-applying groove 7 to increase the sealing performance between the base plate 1 and the antenna cover 4. Specifically, the sealing coating can be silicone or polyurethane adhesive, which can strengthen the connection between the sealing groove and the base plate 1 while having good sealing performance and durability. This utility model does not limit the specific adhesive used.

[0039] Furthermore, in one embodiment of this utility model, the base plate 1 is also provided with at least one vent hole 8, and the antenna cover 4 covers the vent hole 8, thereby balancing the air pressure inside and outside the antenna cover 4; this utility model does not limit the specific number of vent holes or their specific positions on the base plate 1, and the number and specific positions on the base plate 1 can be changed according to the actual needs of the usage environment; in one embodiment, two vent holes 8 are provided, located between the first inclined boss 2 and the second inclined boss 5, and the openings are covered with a waterproof and breathable membrane to prevent moisture and dust from entering.

[0040] This utility model also provides a car, which includes the millimeter-wave radar 100 described above. Since the car includes the millimeter-wave radar 100, the specific structure of the millimeter-wave radar 100 is as described in the above embodiments. Since the millimeter-wave radar 100 of this car adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0041] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A millimeter-wave radar, characterized in that, include: A base plate, wherein a first inclined protrusion is formed on the base plate, and the first top surface of the first inclined protrusion is inclined to the base plate; The first PCBA includes a first circuit board, a microstrip antenna and a first chip mounted on the first circuit board, wherein the first circuit board is fixedly mounted on the top surface of the first inclined boss. as well as, The radome covers the base plate and has an inclined surface corresponding to the first top surface. It includes a first terminal inside the radome and a second terminal outside the radome. The first terminal and the second terminal are respectively located in the middle of the side of the radome. The first terminal is electrically connected to the first PCBA, and the second terminal is used to electrically connect to the outside.

2. The millimeter-wave radar as described in claim 1, characterized in that, The bottom plate has a second inclined protrusion that is opposite to the first inclined protrusion, and the first top surface is disposed away from the second top surface of the second inclined protrusion. The millimeter-wave radar also includes: The second PCBA, including a second circuit board and a second chip, is fixedly mounted on the top surface of the second inclined boss, and the second PCBA is electrically connected to the first PCBA.

3. The millimeter-wave radar as described in claim 1, characterized in that, The bottom plate has a second inclined protrusion that is opposite to the first inclined protrusion, and the first top surface is disposed away from the second top surface of the second inclined protrusion. The plane containing the first top surface forms an angle θ1 with the plane containing the bottom plate, the plane containing the second top surface forms an angle θ2 with the plane containing the bottom plate, and the plane containing the inclined surface of the radome forms an angle θ3 with the plane containing the bottom plate, wherein θ1, θ2, and θ3 satisfy: 30°≤θ1≤60°, 30°≤θ2≤60°, 30°≤θ3≤60°.

4. The millimeter-wave radar as described in claim 1, characterized in that, A groove is formed in the middle of the first top surface.

5. The millimeter-wave radar as described in claim 4, characterized in that, The bottom surface of the groove is provided with a first heat dissipation protrusion, and the top surface of the first heat dissipation protrusion abuts against the first chip.

6. The millimeter-wave radar as described in claim 5, characterized in that, A thermally conductive coating is provided between the first heat dissipation protrusion and the first chip.

7. The millimeter-wave radar as described in claim 1, characterized in that, The bottom plate is recessed with a glue-applying groove, which is arranged in a ring and surrounds the first inclined boss; The radome is fixedly installed in the glue-applying groove.

8. The millimeter-wave radar as described in claim 7, characterized in that, The glue-applying tank is filled with a sealing coating.

9. The millimeter-wave radar as described in claim 1, characterized in that, The base plate is also provided with at least one vent hole, and the antenna cover covers the vent hole.

10. A car, characterized in that, Including the millimeter-wave radar as described in any one of claims 1-9.

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