Waveguide antenna assembly, radar structure and intelligent driving system

Abstract

The invention provides a waveguide antenna assembly, a radar structure and an intelligent driving system. The waveguide antenna assembly comprises a waveguide plate, the waveguide plate is provided with a coupling area, the waveguide antenna assembly further comprises fixing pieces, the multiple fixing pieces are fixedly connected to one side of the waveguide plate, the multiple fixing pieces are arranged at intervals in the circumferential direction of the coupling area, the fixing pieces and the coupling area are located on the same side of the waveguide plate, and the fixing pieces are used for being fixedly connected with a circuit board. And the coupling piece on the coupling area is used for being attached to the circuit board. The fixing piece does not rebound after being connected with the waveguide plate, so that the fixing piece can be kept at a preset position and is fixedly connected with the circuit board; the waveguide plate is fixedly connected with the fixing piece, so that the waveguide plate can be kept at a preset position after being assembled; and the coupling piece is arranged in the coupling area of the waveguide plate, so that the coupling piece can be kept at a preset position and is attached to the circuit board, the electrical performance of the waveguide antenna assembly is improved, and the electrical performance of the radar structure is further improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of intelligent driving systems, and in particular to a waveguide antenna assembly, a radar structure and an intelligent driving system. Background Art

[0002] The vehicle-mounted 4D millimeter-wave radar structure is a high-level radio detection technology, which is mainly used in the vehicle's autonomous driving and intelligent driving assistance functions. At present, in the field of vehicle-mounted 4D millimeter-wave radar structures, the radar structure mainly uses PCB antennas. Specifically, there are mainly two forms, one is a series-fed microstrip antenna, and the other is a substrate-integrated waveguide slot antenna.

[0003] With the introduction of a new generation of automotive 4D radar structures on the market, the antenna form has gradually shifted from PCB antennas to waveguide antennas. It is foreseeable that in the field of automotive radar structures, waveguide antennas will gradually become the mainstream antenna trend in the future, and will be expanded to other communication fields.

[0004] WO2022053114 discloses relevant patents for waveguide antennas. The patent publication number that has entered China at the same time is CN116194800A, which introduces a radar sensor system solution using an air waveguide antenna. The waveguide antenna molded part is conductively connected to the circuit board by welding and / or conductive bonding. The molded part is composed of a single-layer plastic component that is at least partially metallized. CN118054203A also provides a similar technical solution.

[0005] In order to ensure good welding, the waveguide antenna molding needs to fit tightly with the circuit board, that is, the circuit board needs a large area of ​​smooth copper surface, and there are no circuit devices on the smooth copper surface, such as crystal oscillators, resistors and capacitors, etc. This is difficult to provide a large area of ​​smooth surface in today's RF PCB, which is gradually miniaturized, with dense devices and compact layout. Therefore, the practicality of the above solution is not strong and can only be used in some special scenarios, such as simple PCB layout, single radar sensor function, and a small number of transceiver antennas. In the multi-channel MIMO radar scenario, the RF PCB area is very small and is covered with various chips and devices, making it difficult to achieve the above application.

[0006] DE102020213582 (A1) also discloses the relevant technology of waveguide antenna, and the patent publication number that has entered China at the same time is CN114430618A, which introduces a high-frequency circuit with a circuit board and a waveguide structure, which is characterized by the channel metallization of the waveguide structure, two layers of metal plates attached to both sides of the waveguide structure, and the waveguide antenna is fixedly connected to the lower metal plate, and the lower metal plate is fixed to the circuit board through a press-in pin. Among them, the press-in pin is stamped from the lower metal plate. Specifically, a slender strip structure is stamped out from the lower metal plate, and then the slender strip structure is bent into a right angle, so that the strip structure is a press-in pin, and the angle between the press-in pin and the lower metal plate is 90°.

[0007] However, although the above technical solution solves the problem of low practicality, the sheet metal stamping process has inherent process accuracy problems. After the actual stamping process, the press-in pin rebounds, causing the press-in pin to be misaligned, that is, the press-in pin cannot reach the preset angle, that is, the press-in pin is not at the ideal bending angle. After the press-in pin is pressed into the circuit board, the coupling part of the waveguide antenna cannot fit tightly with the circuit board, resulting in poor electrical performance of the radar structure. Summary of the invention

[0008] The purpose of the present disclosure is to overcome the deficiencies in the prior art and to provide a waveguide antenna assembly, a radar structure and an intelligent driving system that allow a coupling member to fit tightly with a circuit board, thereby improving electrical performance.

[0009] The purpose of this disclosure is achieved through the following technical solutions:

[0010] A waveguide antenna assembly comprises a waveguide plate, wherein the waveguide plate is provided with a coupling area, and the waveguide antenna assembly further comprises a fixing member, wherein a plurality of the fixing members are fixedly connected to one side of the waveguide plate, the plurality of the fixing members are arranged at intervals along the circumference of the coupling area, and each of the fixing members and the coupling area are located on the same side of the waveguide plate, and each of the fixing members is used to be fixedly connected to a circuit board, so that the coupling member on the coupling area is used to fit on the circuit board.

[0011] In some embodiments, the fixing member is fixedly connected to the waveguide plate by an injection molding process; and / or,

[0012] The waveguide antenna assembly further includes a coupling element, which is located in the coupling region and connected to the waveguide plate.

[0013] In some embodiments, the fixing member and the waveguide plate are both plastic structures.

[0014] In some embodiments, the fixing member is a metal structure, the waveguide plate is a plastic structure, and the fixing member and the waveguide plate are fixedly connected by an in-mold injection molding process.

[0015] In some embodiments, the fixing member is provided with a locking portion, and the locking portion is used for fixed connection with the circuit board.

[0016] In some embodiments, the locking portion is provided with a connecting hole.

[0017] In some embodiments, the connecting hole is a threaded hole.

[0018] A radar structure comprises the waveguide antenna assembly described in any one of the above embodiments; the radar structure also comprises a shielding plate and a circuit board, the shielding plate is connected to the side of the waveguide plate away from the fixing member, and the circuit board is fixedly connected to each of the fixing members so that the circuit board is also in contact with the coupling member on the coupling area.

[0019] In some of the embodiments, the radar structure further includes a plurality of locking members, and the plurality of fixing members are respectively fixedly connected to the circuit board through the plurality of locking members, so that the coupling member fits the circuit board.

[0020] An intelligent driving system comprises the radar structure described in any one of the above embodiments.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] 1. Since the fixing part is not integrally connected to the waveguide plate through a stamping process, there is no springback problem after the fixing part is connected to the waveguide plate, which suppresses the problem of the fixing part being displaced, so that the fixing part can be kept in a predetermined position and fixedly connected to the circuit board; and since the waveguide plate is fixedly connected to the fixing part, the waveguide plate can be kept in a predetermined position after assembly; and since the coupling part is arranged in the coupling area of ​​the waveguide plate, the coupling part can be kept in a predetermined position and fit with the circuit board, thereby improving the electrical performance of the waveguide antenna assembly, and thus improving the electrical performance of the radar structure.

[0023] 2. The coupling member is fitted to the circuit board through the fixing member on the waveguide plate, and there is no need to punch out press pins on the shielding plate, which simplifies the manufacturing process of the shielding plate and improves the manufacturing efficiency of the shielding plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a radar according to an embodiment;

[0026] Figure 2 for Figure 1 A schematic diagram of a partial structure of a waveguide antenna assembly of the radar structure shown;

[0027] Figure 3 for Figure 1 A schematic structural diagram of a shielding plate of a radar structure shown;

[0028] Figure 4 for Figure 1 Another partial structural schematic diagram of the waveguide antenna assembly of the radar structure shown;

[0029] Figure 5 for Figure 1 Another partial structural schematic diagram of the waveguide antenna assembly of the radar structure shown.

[0030] Figure numerals: 10, radar structure; 100, waveguide antenna assembly; 110, waveguide plate; 111, waveguide channel; 112, E-plane waveguide antenna; 113, radiation slot; 114, rectangular groove; 115, long strip slot; 120, coupling member; 130, fixing member; 200, shielding plate; 201, avoidance hole; 202, make way hole; 300, circuit board; 400, chip; 500, locking member. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] The present disclosure provides a waveguide antenna assembly, including a waveguide plate, the waveguide plate is provided with a coupling area, the coupling area is used to set a coupling member, and the coupling member is used to connect and couple with a circuit board. The waveguide antenna assembly also includes a fixing member, a plurality of fixing members are fixedly connected to one side of the waveguide plate, a plurality of fixing members are arranged at intervals along the circumference of the coupling area, and each fixing member and the coupling area are located on the same side of the waveguide plate, each fixing member is used to be fixedly connected to the circuit board, so that the coupling member on the coupling area is used to fit on the circuit board. Among them, the side of the waveguide plate adjacent to the fixing member is used to fit with the shielding plate, so that the shielding plate seals the waveguide channel and the E-plane waveguide antenna on the waveguide plate. The present disclosure also provides a radar structure, including the waveguide antenna assembly described in any of the above embodiments; the radar structure also includes a shielding plate and a circuit board, the shielding plate is connected to the side of the waveguide plate away from the fixing member, and the circuit board is fixedly connected to each of the fixing members, so that the circuit board is also fitted with the coupling member on the coupling area. The present disclosure also provides an intelligent driving system.

[0035] The above-mentioned waveguide antenna assembly, radar structure and intelligent driving system, because the fixing part is not connected to the waveguide plate as a whole through a stamping process, there is no problem of rebound after the fixing part is connected to the waveguide plate, which suppresses the problem of the fixing part being offset, so that the fixing part can be kept in a predetermined position and fixedly connected to the circuit board; and because the waveguide plate is fixedly connected to the fixing part, the waveguide plate can be kept in a predetermined position after assembly; and because the coupling part is arranged in the coupling area of ​​the waveguide plate, the coupling part can be kept in a predetermined position and fit with the circuit board, which improves the electrical performance of the waveguide antenna assembly, and then improves the electrical performance of the radar structure. Furthermore, the fixing part on the waveguide plate is used to achieve the fitting of the coupling part and the circuit board, and there is no need to punch out the press-in pins on the shielding plate, which simplifies the manufacturing process of the shielding plate and improves the manufacturing efficiency of the shielding plate.

[0036] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0037] like Figure 1 and Figure 2As shown, a waveguide antenna assembly 100 of an embodiment includes a waveguide plate 110, and the waveguide plate 110 is provided with a coupling area, and the coupling area is used to set a coupling member 120, and the coupling member 120 is used to connect and couple with the circuit board 300. The waveguide antenna assembly also includes a fixing member 130, and a plurality of fixing members 130 are fixedly connected to one side of the waveguide plate 110. The plurality of fixing members 130 are arranged at intervals along the circumference of the coupling area, and each fixing member 130 and the coupling area are located on the same side of the waveguide plate 110, and each fixing member 130 is used to be fixedly connected to the circuit board 300, so that the coupling member 120 on the coupling area is used to fit on the circuit board 300. Among them, the side of the waveguide plate 110 adjacent to the fixing member 130 is used to fit with the shielding plate 200, so that the shielding plate 200 seals the waveguide channel 111 and the E-plane waveguide antenna 112 on the waveguide plate 110.

[0038] like Figure 1 As shown, in this embodiment, the fixing member 130 is integrally connected to the waveguide plate 110 through a non-stamping process, that is, the fixing member 130 is not connected to the waveguide plate 110 through a stamping process. After a plurality of fixing members 130 are fixedly connected to the circuit board 300, the coupling member 120 arranged on the coupling area fits tightly on the circuit board 300.

[0039] In the waveguide antenna assembly 100, since the fixing member 130 is not integrally connected to the waveguide plate 110 by a stamping process, there is no rebound problem after the fixing member 130 is connected to the waveguide plate 110, and the problem of the fixing member 130 being offset is suppressed, so that the fixing member 130 can be kept at a predetermined position and fixedly connected to the circuit board 300; and since the waveguide plate 110 is fixedly connected to the fixing member 130, the waveguide plate 110 can be kept at a predetermined position after assembly; and since the coupling member 120 is arranged in the coupling area of ​​the waveguide plate 110, the coupling member 120 can be kept at a predetermined position and fit with the circuit board 300, thereby improving the electrical performance of the waveguide antenna assembly 100, and further improving the electrical performance of the radar structure 10. Furthermore, the fixing member 130 on the waveguide plate 110 is used to achieve the fitting of the coupling member 120 and the circuit board 300, and there is no need to punch out a press-in pin on the shielding plate 200, which simplifies the manufacturing process of the shielding plate 200 and improves the manufacturing efficiency of the shielding plate 200.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments, the waveguide antenna assembly 100 further includes a coupling member 120, the coupling member 120 is located in the coupling region and connected to the waveguide plate 110, and the coupling member 120 is used to attach and couple with the circuit board 300. Further, the coupling member 120 and the waveguide plate 110 are integrally connected through an injection molding process. Of course, in other embodiments, the coupling member 120 can also be formed separately, for example, the coupling member 120 can be processed separately through CNC.

[0041] like Figure 1 As shown, in some of the embodiments, the fixing member 130 is fixedly connected to the waveguide plate 110 through an injection molding process, thereby improving the manufacturing efficiency of the waveguide antenna assembly 100 .

[0042] like Figure 1 As shown, further, the fixing member 130 and the waveguide plate 110 are both plastic structures, so that the fixing member 130 and the waveguide plate 110 can be manufactured with one type of incoming material, and the fixing member 130 and the waveguide plate 110 can be manufactured with only one supply of material, which simplifies the production steps and improves the production efficiency.

[0043] like Figure 1 As shown, further, the fixing member 130 is a metal structure, the waveguide plate 110 is a plastic structure, and the fixing member 130 is fixedly connected to the waveguide plate 110 through an in-mold injection molding process. In this embodiment, since the fixing member 130 is a metal structure, the strength of the fixing member 130 is improved, and the risk of wear and deformation of the fixing member 130 is reduced, so that the fixing member 130 can still be maintained at a predetermined position and fixedly connected to the circuit board 300 after receiving an external force.

[0044] Of course, in other embodiments, the fixing member 130 can also be a threaded fastener 500, and a threaded connection hole is opened on one side of the waveguide plate 110. One end of the fixing member 130 is located in the threaded connection hole and is threadedly connected to the waveguide plate 110, so that one end of the fixing member 130 is fixedly connected to the waveguide plate 110.

[0045] like Figure 1 As shown, in some embodiments, the fixing member 130 is provided with a locking portion, and the locking portion is used to be fixedly connected to the circuit board 300. In this embodiment, the portion of the fixing member 130 away from the waveguide plate 110 is provided with a locking portion, and the locking portion is used to be fixedly connected to the circuit board 300, so that the fixing member 130 is fixedly connected to the circuit board 300.

[0046] In some of the embodiments, the locking portion is provided with a connection hole, and the connection hole is used to cooperate with an external locking member, so that the locking portion can be fixedly connected to the circuit board 300 through the locking member.

[0047] Furthermore, the connection hole is a threaded hole, so that the connection hole can cooperate with the external threaded fastener 500, and then the locking part can be fixedly connected to the circuit board 300 through the threaded fastener 500, thereby improving the convenience of the fixed connection between the fixing member 130 and the circuit board 300. Of course, in other embodiments, the connection hole can also be a snap-fitting hole, and the connection hole cooperates with the external locking member, so that the fixing member 130 is snap-fitted with the locking member, and then the fixing member 130 is fixedly connected to the circuit board 300 through the snap-fitting of the locking member.

[0048] It is understandable that in another embodiment, the locking portion may also be bonded to the circuit board 300 , so that the locking portion is fixedly connected to the circuit board 300 , and further the fixing member 130 is fixedly connected to the circuit board 300 .

[0049] like Figure 1 As shown, in some of the embodiments, the fixing member 130 is columnar, which reduces the difficulty of molding the fixing member 130 and makes the structure of the fixing member 130 more compact.

[0050] like Figure 1 As shown, the present disclosure also provides a radar structure 10, a waveguide antenna assembly 100 of any of the above embodiments. The radar structure 10 also includes a shielding plate 200 and a circuit board 300, the shielding plate 200 is connected to the side of the waveguide plate 110 away from the fixing member 130, and the circuit board 300 is fixedly connected to each fixing member 130, so that the circuit board 300 is also in contact with the coupling member 120 on the coupling area.

[0051] like Figure 3 As shown, further, the shielding plate 200 is formed with an avoidance hole 201, which is used to avoid the coupling member 120. The shielding plate 200 is also provided with a plurality of avoidance holes 202, which are respectively used to avoid a plurality of fixing members 130.

[0052] In the radar structure 10, since the fixing member 130 is not integrally connected to the waveguide plate 110 by a stamping process, there is no rebound problem after the fixing member 130 is connected to the waveguide plate 110, and the problem of the fixing member 130 being offset is suppressed, so that the fixing member 130 can be kept at a predetermined position and fixedly connected to the circuit board 300; and since the waveguide plate 110 is fixedly connected to the fixing member 130, the waveguide plate 110 can be kept at a predetermined position after assembly; and since the coupling member 120 is arranged in the coupling area of ​​the waveguide plate 110, the coupling member 120 can be kept at a predetermined position and fit with the circuit board 300, thereby improving the electrical performance of the waveguide antenna assembly 100, and further improving the electrical performance of the radar structure 10. Furthermore, the fixing member 130 on the waveguide plate 110 is used to achieve the fitting of the coupling member 120 and the circuit board 300, and there is no need to punch out a press-in pin on the shielding plate 200, which simplifies the manufacturing process of the shielding plate 200 and improves the manufacturing efficiency of the shielding plate 200.

[0053] like Figure 1 As shown, in some of the embodiments, the fixing member 130 and the shielding plate 200 are transitionally matched, so that the fixing member 130 can be smoothly inserted into the clearance hole 202, while also reducing the gap between the fixing member 130 and the inner wall of the clearance hole 202, thereby reducing the interference of external electromagnetic waves on the waveguide and the E-plane waveguide antenna 112.

[0054] like Figure 1In some of the embodiments, the coupling member 120 and the shielding plate 200 are transitionally matched, so that the coupling member 120 can be smoothly inserted into the avoidance hole 201, while also reducing the gap between the coupling member 120 and the inner wall of the avoidance hole 201, thereby reducing the interference of external electromagnetic waves on the radar structure 10.

[0055] like Figure 1 As shown, in some of the embodiments, the radar structure 10 further includes a plurality of locking members 500 , and the plurality of fixing members 130 are respectively fixedly connected to the circuit board 300 through the plurality of locking members 500 , so that the coupling member 120 fits the circuit board 300 .

[0056] like Figure 1 As shown, further, the circuit board 300 is provided with a plurality of mounting holes, the locking member 500 is a threaded fastener 500, and the plurality of locking members 500, the plurality of mounting holes and the plurality of fixing members 130 are arranged in a one-to-one correspondence, each locking member 500 is passed through the corresponding mounting hole, one end of each locking member 500 is threadedly connected to the corresponding fixing member 130, and the other end of each locking member 500 abuts against a side of the circuit board 300 away from the fixing member 130, so that each fixing member 130 is fixedly connected to the circuit board 300 through the corresponding locking member 500.

[0057] like Figure 1 As shown, in some embodiments, there is a clearance gap between the shielding plate 200 and the circuit board 300, and the clearance gap is used to accommodate components on the circuit board 300, thereby avoiding the problem of interference between the shielding plate 200 and the components.

[0058] like Figure 1 As shown, further, the shielding plate 200 is parallel to the circuit board 300, and the distance between the shielding plate 200 and the circuit board 300 is 2 mm, so that the avoidance gap can accommodate most of the components on the circuit board 300, ensuring the flexibility of the device layout on the circuit board 300, enriching the application scenarios of the radar structure 10, and also making the radar structure 10 more compact.

[0059] like Figure 1 As shown, in some embodiments, the waveguide plate 110 is welded to the shielding plate 200, so that the waveguide plate 110 fits the shielding plate 200. In this embodiment, the waveguide plate 110 is welded to the shielding plate 200, so that the waveguide plate 110 fits the shielding plate 200 more closely, suppressing external electromagnetic interference to the E-plane waveguide antenna 112 and the waveguide channel 111, and improving the performance of the radar structure 10.

[0060] like Figure 1As shown, in some embodiments, the shielding plate 200 is a metal plate, so that the shielding plate 200 can seal the E-plane waveguide antenna 112 and the waveguide channel 111 to avoid external electromagnetic interference on the E-plane waveguide antenna 112 and the waveguide channel 111.

[0061] In other embodiments, the shielding plate 200 includes a substrate and a copper layer, the copper layer is connected to one side of the substrate, and the copper layer is welded to the shielding plate 200 so that the copper layer fits the shielding plate 200. In this embodiment, the E-plane waveguide antenna 112 and the waveguide channel 111 are sealed by the copper layer to avoid external electromagnetic interference on the E-plane waveguide antenna 112 and the waveguide channel 111.

[0062] Furthermore, the waveguide plate 110 is provided with a receiving groove, and the shielding plate 200 is provided with a receiving hole, which is connected with the receiving groove to form a receiving cavity, and the receiving cavity is used to receive special components with a higher height to avoid interference between the special components and the shielding plate 200 and the waveguide plate 110.

[0063] like Figure 1 As shown, in some of the embodiments, the radar structure 10 further includes a chip 400 , which is connected to the circuit board 300 , and the chip 400 is used to adjust the parameters of the antenna to adapt to different communication requirements.

[0064] like Figure 4 As shown, in some embodiments, a waveguide channel 111 and an E-plane waveguide antenna 112 are opened on one side of the waveguide plate 110 adjacent to the shielding plate 200, and the waveguide channel 111 is communicated with the E-plane waveguide antenna 112, so that the bottom of the waveguide channel 111 and the bottom of the E-plane waveguide antenna 112 are on the same plane. The waveguide channel 111 and the E-plane waveguide antenna 112 can be sealed by only arranging the shielding plate 200 on one side of the waveguide plate 110, and there is no need to arrange the shielding plates 200 on the upper and lower sides of the waveguide plate 110, thereby simplifying the radar structure 10.

[0065] like Figure 4 and Figure 5 As shown, in some embodiments, a radiation slot 113 is provided on one side of the waveguide plate 110 away from the waveguide channel 111, and the radiation slot 113 is connected to the E-plane waveguide antenna 112. In this embodiment, the radiation slot 113 is the main outlet for electromagnetic wave radiation, and the design of the radiation slot 113 directly affects the radiation pattern, gain and polarization characteristics of the antenna. By adjusting the size, shape and position of the radiation slot 113, the performance of the antenna can be optimized to meet specific communication requirements.

[0066] like Figure 5As shown, further, a rectangular groove 114 is formed on the side of the waveguide plate 110 away from the waveguide channel 111, and the radiation groove 113 is formed on the bottom wall of the rectangular groove 114. Further, a long strip groove 115 is formed on the side of the waveguide plate 110 away from the waveguide channel 111, and the long strip groove 115 is disposed adjacent to the rectangular groove 114.

[0067] The present disclosure further provides a radar assembly method, by which the radar structure described in any of the above embodiments is assembled, the radar assembly method comprising:

[0068] Laying the waveguide plate to the shielding plate;

[0069] Welding the waveguide plate to the shielding plate;

[0070] The plurality of fixing members are respectively fixedly connected to the circuit board so that the coupling member on the waveguide plate fits the circuit board.

[0071] In this embodiment, the waveguide plate is firstly attached to the shielding plate. At this time, the coupling parts on the waveguide plate will be inserted into the avoidance holes of the shielding plate, and each fixing part will be inserted into the corresponding avoidance holes of the shielding plate. Then, the waveguide plate is welded to the shielding plate so that the waveguide plate and the shielding plate are fixedly connected. Then, multiple fixing parts are fixedly connected to the circuit board respectively so that the coupling parts are attached to the circuit board.

[0072] In the above radar assembly method, since the fixing part is not integrally connected to the waveguide plate through a stamping process, there is no rebound problem after the fixing part is connected to the waveguide plate, which suppresses the problem of the fixing part being offset, so that the fixing part can be kept in a predetermined position and fixedly connected to the circuit board; and since the waveguide plate is fixedly connected to the fixing part, the waveguide plate can be kept in a predetermined position after assembly; and since the coupling part is arranged in the coupling area of ​​the waveguide plate, the coupling part can be kept in a predetermined position and fit with the circuit board, which improves the electrical performance of the waveguide antenna assembly, and further improves the electrical performance of the radar structure. Furthermore, the fixing part on the waveguide plate is used to achieve the fitting of the coupling part and the circuit board, and there is no need to punch out a press-in pin on the shielding plate, which simplifies the manufacturing process of the shielding plate and improves the manufacturing efficiency of the shielding plate.

[0073] However, since the bonding area between the coupling member and the circuit board is relatively small, it is easy to cause the coupling member to fail to bond tightly to the circuit board due to misoperation.

[0074] In order to ensure that the coupling member is closely attached to the circuit board, in some embodiments, after the step of respectively fixing and connecting a plurality of fixing members to the circuit board so that the coupling member on the waveguide plate is attached to the circuit board, the radar assembly method further includes:

[0075] Acquire an assembly image of the coupling component and the circuit board;

[0076] Process the assembly image to extract the actual fitting line between the coupling and the circuit board;

[0077] Calculating the gap values ​​for multiple calibration points of the actual bonding line to obtain multiple bonding gap values;

[0078] Perform standard deviation processing on multiple bonding gap values ​​to obtain the bonding gap standard deviation of the actual bonding line;

[0079] Determine whether the standard deviation of the fitting gap is greater than the preset value of the standard deviation;

[0080] If so, the alarm device is controlled to output a first alarm signal to remind the user to perform maintenance or reassembly adjustment operations.

[0081] In this embodiment, an assembly image of the coupling component and the circuit board bonded together is obtained, the assembly image is processed, the actual bonding line between the coupling component and the circuit board is extracted, a plurality of calibration points with intervals are set on the actual bonding line, and the gap values ​​of the plurality of calibration points are calculated to obtain a plurality of bonding gap values, and then the plurality of bonding gap values ​​are processed with standard deviation values, that is, the bonding gap standard deviation is compared with a preset standard deviation value to obtain the bonding gap standard deviation of the actual bonding line, which can characterize the discrete degree of the plurality of bonding gap values, and further characterize the tightness of the bonding between the coupling component and the circuit board; then, it is determined whether the bonding gap standard deviation is greater than the preset standard deviation value, and if so, it means that the coupling component is not tightly bonded to the circuit board, and at this time, the alarm is controlled to send a first alarm signal, such as sound, light or other signals, to avoid unqualified radar structures from flowing into the next assembly process, thereby improving the qualified rate of radar structures.

[0082] In some embodiments, the step of processing the assembly image includes:

[0083] Performing edge detection processing on the assembly image to display the contour lines of the coupling component and the circuit board in the assembly image;

[0084] Segment the assembly image;

[0085] Perform feature extraction on assembly images;

[0086] In this embodiment, edge detection processing is performed on the assembly image to display the contour lines of all features in the assembly image, so that the assembly image displays the contour lines of the coupling part and the contour lines of the circuit board, and then the assembly image is segmented to remove the background of the image, and then feature extraction processing is performed on the assembly image to extract the actual bonding line between the coupling part and the circuit board. In this way, through the above processing, the interference features of the assembly image are reduced, which is conducive to the subsequent calculation of the gap values ​​of multiple calibration points of the actual bonding line, and the accuracy of the bonding gap standard deviation of the actual bonding line is improved.

[0087] In some embodiments, after the step of controlling the alarm to output the first alarm signal, the radar assembly method further comprises:

[0088] Separate each fixing member from the circuit board;

[0089] Grind the mating surface of the coupling.

[0090] In this embodiment, when determining whether the standard deviation of the bonding gap is greater than a preset value of the standard deviation, the bonding surface of the coupling component is smoothed so that the bonding surface of the coupling component can be bonded to the circuit board during secondary assembly, thereby solving the problem that the coupling component cannot be bonded to the circuit board due to poor manufacturing precision.

[0091] It is understandable that since the coupling member and the waveguide plate are made by injection molding, the injection mold will be worn after being used for a certain number of times, which may cause convex points to appear on the mating surface of the coupling member. When there are convex points on the mating surface, the mating surface will not be able to fit tightly with the circuit board, so it is necessary to avoid the mating surface with convex points fitting with the circuit board.

[0092] In some of the embodiments, before the step of attaching the waveguide plate to the shielding plate, the radar assembly method further comprises:

[0093] acquiring an image of the waveguide antenna assembly;

[0094] Performing image processing on the image of the waveguide antenna assembly, extracting the mating surface of the coupling component, and obtaining a detection image;

[0095] Determine whether there are any abnormal raised points on the fitting surface;

[0096] If so, perform surface treatment on the bonding surface to remove raised abnormal points;

[0097] Perform foreign matter cleaning operations on the waveguide antenna assembly.

[0098] In this embodiment, an image of the waveguide antenna assembly is obtained by a camera, and the image includes the mating surface of the coupling part. Then, the image of the waveguide antenna assembly is processed to extract the mating surface of the coupling part. Then, it is determined whether there are protruding abnormal points on the mating surface. If so, the mating surface is treated to remove the protruding abnormal points. Then, the waveguide antenna assembly is cleaned of foreign matter to remove foreign matter on the surface of the waveguide antenna assembly, so that the surface flatness of the mating surface meets the requirements, and the protruding points are prevented from having adverse effects on the mating, thereby ensuring that the coupling part can be tightly fitted with the circuit board. In addition, since the structure of the injection mold is relatively complex, the disassembly and assembly of the injection mold is also relatively complex. In the present disclosure, the protrusions on the mating surface can be removed by surface treatment, and there is no need to replace or maintain the mold when the protruding points are protruding, which reduces the maintenance times of the mold and improves the convenience of using the mold.

[0099] Furthermore, the step of determining whether there is a protruding abnormal point on the bonding surface includes:

[0100] Matching the detection image with the template image;

[0101] Determine whether the detected image matches the template image.

[0102] In this embodiment, the template image is an image of a non-convex bonding surface, in which the bonding surface is flat, that is, without any protrusions. The detection image is matched with the template image, and then it is determined whether the detection image matches the template image. If the two match, the bonding surface of the coupling member has no convex points.

[0103] Furthermore, if yes, the step of performing surface treatment on the bonding surface to remove the protruding abnormal points includes:

[0104] If there is a raised abnormal point on the bonding surface, obtain the thickness of the raised abnormal point;

[0105] Compare the thickness of the raised abnormal point with the reference range value;

[0106] When the thickness of the protruding abnormal point is within the reference range value, the bonding surface is surface treated to remove the protruding abnormal point.

[0107] Furthermore, after the step of comparing the thickness of the protruding abnormal point with the reference range value and before the step of performing a foreign matter cleaning operation on the waveguide antenna assembly, the radar assembly method further includes:

[0108] When the thickness of the protruding abnormal point is greater than the reference range value, the control alarm sends a second alarm signal to prompt the operator to scrap the waveguide antenna assembly and replace it with a new waveguide antenna assembly for assembly. In this embodiment, when the thickness of the protruding abnormal point is greater than the reference range value, that is, when the thickness of the protruding abnormal point is too thick, the time required to grind the protruding abnormal point is too long, resulting in a significant reduction in production efficiency. Therefore, the waveguide antenna assembly is scrapped and replaced with a new waveguide antenna assembly for assembly, which reduces the time required for assembly and improves production efficiency.

[0109] In some embodiments, the steps of performing a foreign matter cleaning operation on the waveguide antenna assembly include:

[0110] Performing water washing on the waveguide antenna assembly;

[0111] The waveguide antenna assembly is baked.

[0112] In this embodiment, the waveguide antenna assembly is cleaned by water washing and then baked to prevent debris generated by the grinding process from contaminating the fitting surface of the coupling component, thereby ensuring that the coupling component can fit tightly with the circuit board.

[0113] It is understandable that when a lot of dust is adsorbed on the coupling component or the circuit board, the coupling component will not be able to fit tightly with the circuit board.

[0114] In some of the embodiments, after the step of welding the waveguide plate to the shielding plate and before the step of attaching the coupling member to the coupling surface of the circuit board, the radar assembly method further includes: performing dust removal operation on the coupling member and the circuit board.

[0115] In this embodiment, dust on the surfaces of the coupling component and the circuit board can be removed through the dust removal operation to prevent the dust from affecting the tightness of the connection between the coupling component and the circuit board, thereby improving the assembly qualification rate of the radar structure.

[0116] The present disclosure also provides an intelligent driving system, comprising the radar structure described in any of the above embodiments.

[0117] In the above-mentioned intelligent driving system, since the fixing part is not integrally connected to the waveguide plate through a stamping process, there is no rebound problem after the fixing part is connected to the waveguide plate, thereby suppressing the problem of displacement of the fixing part, so that the fixing part can be maintained in a predetermined position and fixedly connected to the circuit board; and since the waveguide plate is fixedly connected to the fixing part, the waveguide plate can be maintained in a predetermined position after assembly; and since the coupling part is arranged in the coupling area of ​​the waveguide plate, the coupling part can be maintained in a predetermined position and fit with the circuit board, thereby improving the electrical performance of the waveguide antenna assembly, and further improving the electrical performance of the radar structure.

[0118] Furthermore, the coupling member is fitted to the circuit board through the fixing member on the waveguide plate, and there is no need to punch out press pins on the shielding plate, which simplifies the manufacturing process of the shielding plate and improves the manufacturing efficiency of the shielding plate.

[0119] Compared with the prior art, the present invention has at least the following advantages:

[0120] 1. Since the fixing part is not integrally connected to the waveguide plate through a stamping process, there is no springback problem after the fixing part is connected to the waveguide plate, which suppresses the problem of the fixing part being displaced, so that the fixing part can be kept in a predetermined position and fixedly connected to the circuit board; and since the waveguide plate is fixedly connected to the fixing part, the waveguide plate can be kept in a predetermined position after assembly; and since the coupling part is arranged in the coupling area of ​​the waveguide plate, the coupling part can be kept in a predetermined position and fit with the circuit board, thereby improving the electrical performance of the waveguide antenna assembly, and thus improving the electrical performance of the radar structure.

[0121] 2. The coupling member is fitted to the circuit board through the fixing member on the waveguide plate, and there is no need to punch out press pins on the shielding plate, which simplifies the manufacturing process of the shielding plate and improves the manufacturing efficiency of the shielding plate.

[0122] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A waveguide antenna assembly, comprising a waveguide plate (110), wherein the waveguide plate (110) is provided with a coupling region, It is characterized in that The waveguide antenna assembly further comprises a fixing member (130), wherein a plurality of the fixing members (130) are fixedly connected to one side of the waveguide plate (110), the plurality of the fixing members (130) are arranged at intervals along the circumference of the coupling region, and each of the fixing members (130) and the coupling region are located on the same side of the waveguide plate (110), and each of the fixing members (130) is used to be fixedly connected to a circuit board (300), so that the coupling member (120) on the coupling region is used to fit on the circuit board (300).

2. The waveguide antenna assembly according to claim 1, It is characterized in that The fixing member (130) is fixedly connected to the waveguide plate (110) by an injection molding process; and / or, The waveguide antenna assembly further comprises a coupling element (120), wherein the coupling element (120) is located in the coupling region and connected to the waveguide plate (110).

3. The waveguide antenna assembly according to claim 2, It is characterized in that The fixing member (130) and the waveguide plate (110) are both plastic structures.

4. The waveguide antenna assembly according to claim 2, It is characterized in that The fixing member (130) is a metal structure, the waveguide plate (110) is a plastic structure, and the fixing member (130) and the waveguide plate (110) are fixedly connected by an in-mold injection molding process.

5. The waveguide antenna assembly according to claim 1, It is characterized in that The fixing member (130) is provided with a locking portion, and the locking portion is used to be fixedly connected to the circuit board (300).

6. The waveguide antenna assembly according to claim 5, It is characterized in that The locking portion is provided with a connecting hole.

7. The waveguide antenna assembly according to claim 6, It is characterized in that The connecting hole is a threaded hole.

8. A radar structure, It is characterized in that The invention comprises a waveguide antenna assembly (100) as claimed in any one of claims 1 to 7; the radar structure further comprises a shielding plate (200) and a circuit board (300), wherein the shielding plate (200) is connected to a side of the waveguide plate (110) facing away from the fixing member (130), and the circuit board (300) is fixedly connected to each of the fixing members (130), so that the circuit board (300) is also in contact with the coupling member (120) on the coupling area.

9. The radar structure according to claim 8, It is characterized in that The radar structure also includes a plurality of locking members, and the plurality of fixing members (130) are respectively fixedly connected to the circuit board (300) through the plurality of locking members, so that the coupling member (120) is fitted with the circuit board (300).

10. An intelligent driving system, It is characterized in that Comprising the radar structure according to claim 8 or 9.

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