Camera and radar device

Abstract

The present invention discloses a camera and a radar device thereof, wherein the camera has at least one camera module and a radar device built therein; the camera module is configured so that its visible area covers a parking area, and the optical axis of the camera module forms an acute angle with the length direction of the parking area; the radar device is configured so that its detection area at least partially overlaps with the visible area of the camera module, so that the camera module can be turned on or off in response to the detection signal of the radar device; the radar device includes a first beam wave component, a second beam wave component and a third beam wave component, and the camera is configured so that: the detection waves constrained by the first beam wave component, the second beam wave component and the third beam wave component in sequence avoid non-vehicle objects within the visible area and outside the parking area, so as to reduce the false alarm rate of triggering the camera module to turn on in response to the detection signal of the non-vehicle object.

Description

Technical Field

[0001] The present invention relates to the technical field of video shooting, and in particular to a camera and a radar device thereof. Background Art

[0002] Parking cameras can be used to monitor roadside reversing and / or front-end parking. They use the detection wave ranging principle to detect the time when vehicles park in and out of parking spaces. The parking information obtained through video and / or photos is uploaded to the background and / or processed locally to record and manage vehicle specifications and parking time, thereby reducing the cost of vehicle management by replacing manual labor.

[0003] In existing parking monitoring cameras installed at the edge of the sidewalk, the detection signal of the radar device is used as the switch control signal of the camera module. The detection wave emitted by the radar device is not directional, that is, it will be emitted in all directions along the 360° circumference of the outer side of the radar cover. Figure 1 As shown, the parking camera 1 is shooting towards the parking space 100. Due to the presence of interference objects 200 such as weeds and fences on the roadside, the echo of the detection wave toward the interference object 220 presents different directionality, which is very likely to interfere with the detection wave toward the vehicle direction 130, thereby reducing the accuracy and reliability of vehicle detection. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a camera and a radar device thereof, which, through a radar cover, constrains the detection wave to avoid non-vehicle objects within the visible area of the camera module and outside the parking area, so as to reduce the false alarm rate of triggering the camera module to turn on in response to the detection signal of the non-vehicle object.

[0005] One embodiment of the present invention provides a radar device for a camera, comprising:

[0006] a housing, the housing comprising a window located on a front surface thereof and an inner cavity communicating with the window;

[0007] A circuit board is fixed in the inner cavity, and a radar component for emitting detection waves is mounted on a surface of the circuit board facing the window;

[0008] a radome fixed in the inner cavity and located between the circuit board and the window to constrain the detection wave to be emitted from the window to the outside of the housing at a predetermined angle;

[0009] Wherein, the radome comprises:

[0010] a bottom plate, the bottom plate being in contact with a surface of the circuit board facing the window;

[0011] a first beam wave assembly formed on a surface of the bottom plate facing the window, and having a through hole formed in the bottom plate to expose the radar assembly, so as to constrain the detection wave to be along an extension direction of the first beam wave assembly; and

[0012] a second beam wave assembly connected to the first beam wave assembly and having a radial cross-sectional shape with a diameter increasing in a direction from the circuit board toward the window, so as to constrain the detection wave to be along a radial direction of the second beam wave assembly within the range of the second beam wave assembly.

[0013] In one embodiment, the first beam wave assembly is formed into a cylindrical shape with a constant first diameter in its extension direction, a first end of the first beam wave assembly is opened from the bottom plate to expose the radar assembly, and a second end is connected to the second beam wave assembly.

[0014] In one embodiment, the second beam wave assembly includes a peripheral wall connected to the second end of the first beam wave assembly, the peripheral wall enclosing a truncated cone or a truncated cone with a diameter increasing in a direction from the circuit board toward the window;

[0015] The peripheral wall of the second beam wave assembly has a first inclination angle.

[0016] In one embodiment, the radome comprises:

[0017] A third beam wave assembly, one or more of which are formed on the inner surface of the peripheral wall of the second beam wave assembly, so as to constrain the detection wave to be along the extension direction of the third beam wave assembly within the range of the third beam wave assembly.

[0018] In one embodiment, the third beam wave assembly has a second tilt angle, and the second tilt angle is smaller than the first tilt angle.

[0019] In one embodiment, the third beam wave assembly is formed on an inner surface of a peripheral wall of the second beam wave assembly in a horizontal direction and / or a vertical direction.

[0020] In one embodiment, the rear end of the second beam wave assembly is connected to the second end of the first beam wave assembly, and the third beam wave assembly is adjacent to the front end of the second beam wave assembly;

[0021] The front end of the third beam wave assembly is flush with the front end of the second beam wave assembly, or,

[0022] The front end of the third beam wave assembly protrudes from the front end of the second beam wave assembly.

[0023] In one embodiment, a first gap is provided between the radome and the viewing window, wherein the first gap is associated with a wavelength of the detection wave.

[0024] In one embodiment, the housing comprises:

[0025] A fourth beam wave assembly is formed on the outside of the window and has a radial cross-sectional shape with a diameter increasing in the direction from the window toward the outside of the shell, so as to constrain the detection wave to be along the radial direction of the fourth beam wave assembly within the range of the fourth beam wave assembly.

[0026] In one embodiment, the fourth beam wave assembly has a third tilt angle, and the third tilt angle is greater than or equal to the first tilt angle.

[0027] In one embodiment, the rear end of the second beam wave assembly is connected to the second end of the first beam wave assembly, and the front end of the second beam wave assembly has a second diameter;

[0028] A rear end of the fourth beam wave assembly facing the window has a third diameter, and the third diameter is greater than or equal to the second diameter.

[0029] Another embodiment of the present invention further provides a camera, which is fixed to the road surface adjacent to the parking area.

[0030] Wherein, the camera is equipped with at least one camera module and a radar device;

[0031] The camera module is configured such that: a visible area of the camera module covers the parking area, and an optical axis of the camera module forms an acute angle with a length direction of the parking area;

[0032] The radar device is configured such that: a detection area of the radar device at least partially overlaps a visible area of the camera module, so that the camera module can be turned on or off in response to a detection signal from the radar device;

[0033] The radar device includes a first beam wave assembly, a second beam wave assembly, and a third beam wave assembly, wherein the first beam wave assembly is formed into a cylindrical shape having a first diameter in its extension direction, the second beam wave assembly is formed into an open shape having an increasing diameter in its extension direction, the centerlines of the first beam wave assembly and the second beam wave assembly are collinear, and the third beam wave assembly has a third curved surface portion and a third planar portion in its extension direction, and the angle between the third planar portion and the centerline of the second beam wave assembly is determined by the detection area of the radar device;

[0034] The camera is configured to avoid non-vehicle objects within the visible area and outside the parking area through the detection waves constrained by the first beam component, the second beam component and the third beam component in sequence, so as to reduce the false alarm rate of triggering the camera module to turn on in response to the detection signal of the non-vehicle object.

[0035] In one embodiment, a through hole is defined at a first end of the first beam wave component to expose a radar component that transmits the detection wave, and a second end of the first beam wave component is connected to the second beam wave component.

[0036] In one embodiment, the second beam wave assembly includes a peripheral wall connected to the second end of the first beam wave assembly, and the peripheral wall encloses a truncated cone or a truncated cone with a diameter increasing in the extending direction thereof;

[0037] A peripheral wall of the second beam wave assembly forms a first inclination angle with a center line of the second beam wave assembly.

[0038] In one embodiment, the third beam wave assembly is formed on the inner surface of the second beam wave assembly.

[0039] The third arc portion fits the inner surface of the second beam wave assembly, and the third planar portion forms a second inclination angle with the center line of the second beam wave assembly, and the second inclination angle is smaller than the first inclination angle.

[0040] In one embodiment, the second inclination angle is determined by a detection area of the radar device.

[0041] In one embodiment, the azimuth angle of the third beam assembly relative to the centerline of the second beam assembly corresponds to the azimuth angle of the parking area relative to the centerline of the second beam assembly; or

[0042] The azimuth angle of the third beam wave assembly relative to the center line of the second beam wave assembly corresponds to the azimuth angle of the preset detection area relative to the center line of the second beam wave assembly.

[0043] In one embodiment, the third planar portion is flush with the front end of the second beam wave assembly, or,

[0044] The third plane portion protrudes from a front end of the second beam wave assembly.

[0045] In one embodiment, the radar device includes a housing, wherein the housing includes a window for transmitting the detection wave.

[0046] A first gap is formed between the front end of the second beam wave assembly and / or the third beam wave assembly and the window, and the first gap is associated with the wavelength of the detection wave.

[0047] In one embodiment, the housing comprises:

[0048] a fourth beam wave assembly, the fourth beam wave assembly being formed outside the window and having a radial cross-sectional shape with a diameter increasing along the thickness direction of the shell,

[0049] The camera is configured to avoid non-vehicle objects within the visible area and outside the parking area via detection waves constrained by the first beam component, the second beam component, the third beam component, and the fourth beam component in sequence.

[0050] In one embodiment, the fourth beam wave assembly has a third tilt angle, and the third tilt angle is greater than or equal to the first tilt angle.

[0051] In one embodiment, the rear end of the second beam wave assembly is connected to the second end of the first beam wave assembly, and the front end of the second beam wave assembly has a second diameter;

[0052] A rear end of the fourth beam wave assembly facing the window has a third diameter, and the third diameter is greater than or equal to the second diameter.

[0053] As can be seen from the above technical solution, the radar device in this embodiment has a radome that constrains detection waves to be emitted from the viewing window to the outside of the housing at a predetermined avoidance angle. This avoidance of interfering objects is achieved by changing the transmission direction of the detection waves emitted by the radar assembly, thereby eliminating the possibility of interference echoes generated by interfering objects and improving the accuracy of radar target detection. Furthermore, by concentrating the detection waves within the effective detection area, the detection wave energy within the effective detection area can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The following drawings are only used to schematically illustrate and explain the present invention and are not intended to limit the scope of the present invention.

[0055] Figure 1 It is a schematic diagram of the field of view of a parking camera in the prior art.

[0056] Figure 2 It is a cross-sectional view of a first embodiment of a radar device according to the present invention.

[0057] Figure 3 FIG. 1 is an exploded schematic diagram of a first embodiment of a radar device according to the present invention.

[0058] Figure 4 It is a cross-sectional view of a radome in a first embodiment of the radar apparatus according to the present invention.

[0059] Figure 5 FIG. 1 is a schematic structural diagram of a radar cover in a second embodiment of a radar device according to the present invention.

[0060] Figures 6a to 6c FIG. 1 is a schematic structural diagram of a radar cover in a third embodiment of a radar device according to the present invention.

[0061] Figure 7a and Figure 7b FIG. 1 is a cross-sectional view of a radome in a third embodiment of a radar apparatus according to the present invention.

[0062] Figure 8 FIG. 1 is a cross-sectional view of a housing of a radar device according to a fourth embodiment of the present invention.

[0063] Figure 9 It is a structural schematic diagram of a camera of the present invention. DETAILED DESCRIPTION

[0064] In order to have a clearer understanding of the technical features, purposes and effects of the invention, specific embodiments of the present invention are now described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

[0065] In this document, “illustrative” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “illustrative” should not be interpreted as a more preferred or more advantageous technical solution.

[0066] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure and do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled.

[0067] In order to solve the problem in the prior art that there are interference objects in the shooting field of view of the parking camera, thereby interfering with the image acquisition of the photographed object, the present application proposes a camera and its radar device, which constrains the detection wave through the radar cover to avoid non-vehicle objects within the visible area of the camera module and outside the parking space area, so as to reduce the false alarm rate of triggering the camera module to turn on in response to the detection signal of the non-vehicle object.

[0068] Figure 9 It is a structural diagram of the camera of the present invention. Figure 1 and Figure 9 As shown, an embodiment of the present invention provides a camera 1 , which is fixed to a road surface 200 adjacent to a parking area 100 .

[0069] The camera 1 has at least one camera module 2 and a radar device built in.

[0070] The camera module 2 is configured such that the visible area of the camera module 2 covers the parking area 100 , and the optical axis of the camera module 2 forms an acute angle with the length direction of the parking area 100 .

[0071] At the same time, the radar device is configured as follows: the detection area of the radar device ( Figure 1 The radar device (illustrated as a trumpet shape in the figure) at least partially overlaps with the visible area of the camera module 2, so that the camera module 2 can be turned on or off in response to the detection signal of the radar device. For example, the detection area of the radar device and the visible area of the camera module 2 form an overlapping area 130 within the parking space area 100, so that the radar device can detect information about vehicles appearing in the overlapping area 130, and the camera module 2 can be turned on or off in response to the detection signal of the radar device in the overlapping area 130.

[0072] in, Figure 2 is a cross-sectional view of a first embodiment of a radar apparatus according to the present invention, Figure 3 FIG. 1 is an exploded view of the first embodiment of the radar device of the present invention. Figure 2 and Figure 3 As shown, the radar device includes a first beam wave component 32, a second beam wave component 33 and a third beam wave component 34, wherein the first beam wave component 32 is formed into a cylindrical shape with a first diameter in its extension direction, and the second beam wave component 33 is formed into an open shape with an increasing diameter in its extension direction, and the center lines of the first beam wave component 32 and the second beam wave component 33 are collinear.

[0073] The camera 1 of this embodiment is configured as follows: the detection waves constrained by the first beam wave component 32, the second beam wave component 33 and the third beam wave component 34 in sequence avoid non-vehicle objects outside the parking area 100, so as to reduce the false alarm rate of triggering the camera module 1 to turn on in response to the detection signal of the non-vehicle object.

[0074] The radar device of the camera of this embodiment has a radar cover that constrains the detection wave to be emitted in a manner that avoids the interference area. It can avoid interference objects by changing the transmission direction of the detection wave emitted by the radar component, thereby eliminating the possibility that the interference object will generate interference echoes, and can improve the accuracy of radar detection targets.

[0075] Combine Figure 1 As can be seen, in an unconstrained situation, the radar assembly's detection waves not only cover a portion of the parking area 100, but also cover a portion 220 of the road surface 200. Non-vehicle objects (interference objects) may be stationary in this area 220. Embodiments of the present invention constrain the emission direction of the radar assembly's detection waves through multiple beamforming assemblies to avoid areas where non-vehicle objects may be present.

[0076] The non-vehicle object is necessarily located outside the parking area 100 . It may be located within the visible area of the camera module of the camera 1 or outside the visible area.

[0077] Figure 2 is a cross-sectional view of a first embodiment of a radar device according to the present invention, Figure 3 FIG. 1 is an exploded view of the first embodiment of the radar device of the present invention. Figure 2 and Figure 3 As described above, one embodiment of the present invention provides a radar device for a camera 1, comprising:

[0078] The housing 10 includes a window 11 on its front end and an inner cavity 12 communicating with the window 11;

[0079] A circuit board 20 is fixed in the inner cavity 12 and has a radar component 21 for emitting detection waves mounted on a surface of the circuit board 20 facing the window 11;

[0080] The radome 30 is fixed in the inner cavity 12 and is located between the circuit board 20 and the window 11 to constrain the detection wave to be emitted from the window 11 to the outside of the housing 10 at a predetermined angle;

[0081] Among them, such as Figure 4 As shown, the radome 30 comprises:

[0082] A bottom plate 31 is attached to a surface of the circuit board 20 facing the window 11;

[0083] A first beamforming assembly 32 is formed on a surface of the bottom plate 31 facing the window 11 , and a through hole is formed in the bottom plate 31 to expose the radar assembly 21 , so as to constrain the detection wave to be along the extension direction of the first beamforming assembly 32 ; and

[0084] The second beam wave assembly 33 is connected to the first beam wave assembly 32 and has a radial cross-sectional shape with a diameter increasing in the direction from the circuit board 20 toward the window 11, so as to constrain the detection wave to be along the radial direction of the second beam wave assembly 33 within the range of the second beam wave assembly 33.

[0085] The housing 10 houses a radar assembly 21. Its front face features a window 11, through which detection waves emitted by the radar assembly 21 exit. The radar assembly 21 is disposed within an inner cavity 12 connected to the window 11. The housing 10 can be constructed, for example, from a material that prevents detection waves from passing through it, or it may not shield against detection waves. The radome 30, on the other hand, is constructed from a thin-walled material that can shield detection waves. Its thin walls confine the detection waves to a confined area within the enclosure.

[0086] The window 11 is an opening formed at the front end of the housing 10. A lens 13, which seals the window 11 and the inner cavity 12, can be mounted thereon. A lens seal 14 is further provided around the periphery of the lens 13 to close the gap between the lens 13 and the window 11, ensuring a high degree of sealing of the inner cavity 12. The lens seal 14 is secured to the periphery of the lens 13 and the inner edge of the window 11 by a seal retaining plate 15. The seal retaining plate 15 is located on the side of the window 11 facing the inner cavity 12. The periphery of the lens 13 can be formed into a stepped portion, comprising a first step having a diameter less than or equal to that of the window 11 and a second step having a diameter greater than that of the window 11. The first step of the lens 13 extends from the inner cavity 12 side beyond the window 11 to closely contact the inner edge of the window 11. The second step defines the relative position of the lens 13 with the window 11, thereby sealing the window 11.

[0087] The rear end surface of the housing 10 can be further sealed to the inner cavity 12 through a sealing structure such as a body sealing ring 16 .

[0088] In this embodiment, the radome 30 is fixed within the inner cavity 12 and is in contact with the circuit board 20 on which the radar assembly 21 is mounted. The circuit board 20 can be secured to the radome 30 using fastening devices such as screws, or can be independently secured within the inner cavity 12. The bottom plate 31 is configured to be in contact with the circuit board 20. Its thickness d2 can be adapted to the thickness of the circuit board 20 or the thickness of the radar assembly 21, for example, slightly greater than the thickness of the radar assembly 21.

[0089] Among them, such as Figure 4 As shown, the radome 30 includes at least two levels of beam wave components: a first beam wave component 32 formed on the bottom plate 31 and a second beam wave component 33 connected to the first beam wave component 32 .

[0090] Although the first beam assembly 32 can be formed into an expanding or contracting structure, that is, having a variable cross-sectional dimension along its extension direction, in order to optimize the output energy of the detection wave and reduce losses, in a preferred embodiment, the first beam assembly 32 is formed into a cylindrical shape with a constant first diameter A1 along its extension direction. Its cross-sectional shape can be circular or rectangular. The first end of the first beam assembly 32 defines a through hole 321 through the base plate 31 for exposing the radar assembly 21, and the second end connects to the second beam assembly 33. The radar assembly 21 can be located at the center of the through hole 321. The first beam assembly 32 constrains the detection wave emitted by the radar assembly 21 to propagate along the axis (extension direction) of the first beam assembly 32 within the cylindrical confines formed by the first beam assembly 32.

[0091] The centerline direction of the first beam wave assembly 32 coincides with the emission direction of the radar assembly 21 and the centerline direction of the window 11 to determine the emission direction of the detection wave.

[0092] The first beam wave assembly 32 protrudes from the surface of the circuit board 20 in the direction of the probe wave's emission. This confines the probe wave to the cylindrical area formed by the first beam wave assembly 32, preventing interference echoes from components protruding from the circuit board 20. Therefore, the first length D1 of the first beam wave assembly 32 along its axis (including the thickness d2 of the base plate 31) should be greater than the maximum thickness of any component protruding from the circuit board 20.

[0093] The second end (front end) of the first beam wave assembly 32 is connected to the second beam wave assembly 33. The second beam wave assembly 33 is formed to have a radial cross-sectional shape with a diameter that increases in the direction from the circuit board 20 toward the viewing window 11. In other words, the second beam wave assembly 33 forms a radial expansion structure similar to the mouth of a trumpet from the second end of the first beam wave assembly 32 to form a radially emitted detection wave. This allows the detection wave emitted from the viewing window 11 to cover the entire area of the parking space that the camera 1 needs to capture, or at least cover a portion of the area of the license plate position that the camera 1 is concerned with, that is, the overlapping area 130 that overlaps with the parking space area 100 and the visible area of the camera module 2.

[0094] The rear end of the second beam wave assembly 33 is connected to the second end of the first beam wave assembly 32, and therefore has the same cross-sectional shape and the same diameter (or side length) as the beam wave assembly 32. Since the second beam wave assembly 33 is formed into a radially increasing structure, the second diameter A2 at the front end is larger than the diameter at the rear end (which is equal to the first diameter A1 of the first beam wave assembly 32).

[0095] The radar device of this embodiment has a radar cover that constrains the detection wave to be emitted from the window to the outside of the shell in a manner that avoids a preset interference area. It can avoid interference objects by changing the transmission direction of the detection wave emitted by the radar component, thereby eliminating the possibility of interference echoes generated by the interference object, and can improve the accuracy of radar detection of targets. Furthermore, by concentrating the detection wave into the effective detection area, the detection wave energy within the effective detection area can be increased. Specifically, this embodiment uses the first beam wave component to maximize the collection of the initial transmission beam emitted by the radar component, while eliminating interference from other electronic components on the circuit board, and uses the second beam wave component to form an effective detection beam area.

[0096] Among them, such as Figure 4 and Figure 5As shown, the second beam wave assembly 33 includes a peripheral wall 331 connected to the second end of the first beam wave assembly 32, and the peripheral wall 331 encloses a truncated cone or a truncated cone with an increasing diameter in the direction from the circuit board 20 toward the window 11; the peripheral wall 331 of the second beam wave assembly 33 has a first inclination angle B1.

[0097] like Figure 4 As shown, the first beam wave assembly 32 is formed into a cylindrical shape with a first diameter A1. Correspondingly, the second beam wave assembly 33 is formed into a truncated cone shape by a peripheral wall 331 that is expanded into a trapezoidal shape. The thickness diameter is the first diameter A1, and the front diameter is the second diameter A2, which is larger than the first diameter A1.

[0098] The central axis of the first beam wave assembly 32 coincides with the central axis of the second beam wave assembly 33. The inclination angle of the peripheral wall 331 of the second beam wave assembly 33 (ie, the angle with the central axis) is a first inclination angle B1.

[0099] like Figure 5 As shown, the second beam wave assembly 33 can be formed in the shape of a truncated pyramid, and its cross-section can be square, rectangular, or polygonal, consistent with the first beam wave assembly 32. In one embodiment, the thickness of the first beam wave assembly 32 can be zero, that is, the bottom 31 defines a through hole 321 that exposes the radar assembly 21, and its thickness d2 is greater than the thickness of the radar assembly 21 protruding from the circuit board 20. Furthermore, there are no components on the circuit board 20 that are greater than the thickness of the radar assembly 21.

[0100] The inclination angle (ie, the angle with the central axis) of the peripheral wall 331 of the second beam wave assembly 33 formed in the shape of a truncated cone is a first inclination angle B1.

[0101] Figure 6a FIG. 1 is a schematic structural diagram of a radar cover in a third embodiment of a radar device according to the present invention. Figure 6a As shown, the radome 30 in this embodiment includes:

[0102] A bottom plate 31 is attached to a surface of the circuit board 20 facing the window 11;

[0103] A first beamforming assembly 32 is formed on a surface of the base plate 31 facing the window 11 . A through hole is formed in the base plate 31 to expose the radar assembly 21 , thereby constraining the detection wave to be along the extension direction of the first beamforming assembly 32 .

[0104] a second beam wave assembly 33 connected to the first beam wave assembly 32 and having a radial cross-sectional shape with a diameter increasing in a direction from the circuit board 20 toward the window 11, so as to constrain the probe wave within the range of the second beam wave assembly 33 to be along a radial direction of the second beam wave assembly 33; and

[0105] The third beam wave assembly 34 , one or more third beam wave assemblies 34 , are formed on the inner surface of the peripheral wall 331 of the second beam wave assembly 33 to constrain the detection wave within the range of the third beam wave assembly 34 to be along the extension direction of the third beam wave assembly 34 .

[0106] The third beam wave assembly 34 may be formed as an integral structure with the second beam wave assembly 33 , or may be installed on the second beam wave assembly 33 as a separate accessory.

[0107] The third beamforming assembly 34 is used to further create an avoidance angle. Within the effective detection area formed by the second beamforming assembly 33, the second beamforming assembly 33 and the third beamforming assembly 34 have different tilt angles. The third beamforming assembly 34 changes the emission direction of the probe wave within the overlapped range of the second beamforming assembly 33 (i.e., the end where the probe wave is emitted from the second beamforming assembly 33), thereby constraining the probe wave to follow the extension direction of the third beamforming assembly 34. Therefore, the third beamforming assembly 34 is not positioned in all circumferential directions of the second beamforming assembly 33, but rather is positioned at one or more predetermined positions.

[0108] Specifically, if Figure 6b As shown, the third beam wave assembly 34 has a third arc portion 341 and a third plane portion 342 in its extension direction. The angle between the third plane portion 342 and the center line of the second beam wave assembly 33 is determined by the detection area of the radar device.

[0109] Combine Figure 1 As shown, the detection area of the radar device is determined by the emission range of the detection wave of the radar component. In this embodiment, the third beam assembly 34 is the last level of constraint on the emission angle of the detection wave and is also the key element in determining the emission angle.

[0110] Among them, such as Figure 7b As shown, the third planar portion 342 and the center line of the second beam wave assembly 33 have a second inclination angle B2, and the second inclination angle B2 is smaller than the first inclination angle B1.

[0111] Furthermore, the emission angle of the detection wave of the radar assembly is not only related to the inclination angle of the third plane portion 342 of the third beam wave assembly 34, but also to the arrangement position of the third beam wave assembly 34 on the second beam wave assembly 33. Specifically, it is related to the azimuth angle of the third beam wave assembly 34 relative to the center line of the second beam wave assembly 33. For example, Figure 7a As shown, the center of the third beam wave assembly 34 (34a or 34b) is connected to the center of the second beam wave assembly 33 to form a straight line. Figure 7a The azimuth angle (eg, the angle with the horizontal direction) in the plane shown is the azimuth angle of the third beam wave assembly 34 relative to the center line of the second beam wave assembly 33 .

[0112] According to the specific application scenario of the parking brick camera, in a specific embodiment, the third beam wave component 34 is formed on the inner surface of the peripheral wall 331 of the second beam wave component 33 in the horizontal direction and / or vertical direction. Figure 6a In the embodiment shown, the radome 30 includes two third beam wave assemblies 34a and 34b. Figure 6b and Figure 6c In the embodiment shown, the radome 30 includes only one third beam assembly 34a or 34b.

[0113] The third beam wave assembly 34 is only formed at a horizontal position or a vertical position of the peripheral wall 331 of the second beam wave assembly 33 , and is not limited to extending along the horizontal direction or the vertical direction, but may have an inclination angle B2 relative to its center line.

[0114] For example, combined with Figure 6b As shown, the third beam assembly 34a is formed at a vertically distal end corresponding to the second beam assembly 33, with an azimuth angle of 90°. The front end of the third beam assembly 34a can, for example, extend horizontally. This can be used to form a vertical avoidance angle, such as to avoid branches in high-altitude areas.

[0115] Optionally, combined Figure 6c As shown, the third beam assembly 34b is formed at a horizontal end position corresponding to the second beam assembly 33, with an azimuth angle of 180°. The front end of the third beam assembly 34b can, for example, extend in the vertical direction. This can be used to form a horizontal avoidance angle, for example, to avoid interference such as weeds on the side of a sidewalk.

[0116] It can be seen that the installation position, number and angle of the third beam wave assembly 34 can be adjusted according to the application scenario.

[0117] like Figure 6a and Figure 7a 、 Figure 7b As shown, the third beam assembly 34 is adjacent to the front end of the second beam assembly 33 , and the front end of the third beam assembly 34 protrudes from the front end of the second beam assembly 33 .

[0118] Optionally, the front end of the third beam wave assembly 34 is flush with the front end of the second beam wave assembly 33 .

[0119] Preferably, if Figure 2 As shown, there is a first gap D0 between the radome 30 and the window 11. The first gap D0 is related to the wavelength of the detection wave. The gap between the radome 30 and the window 11 can be used to absorb the manufacturing and installation tolerances of components such as the radome 30 and the circuit board 20.

[0120] Figure 8FIG is a cross-sectional view of a housing of a fourth embodiment of a radar device according to the present invention. Figure 8 As shown, the housing 10 includes:

[0121] The fourth beam wave component 17 is formed on the outside of the window 11 and has a radial cross-sectional shape with a diameter increasing in the direction from the window 11 toward the outside of the shell 10, so as to constrain the detection wave to be along the radial direction of the fourth beam wave component 17 within the range of the fourth beam wave component 17.

[0122] Specifically, the fourth beam wave assembly 17 has a third tilt angle B4, which is greater than or equal to the first tilt angle B1 and is less than 90°, that is, the fourth beam wave assembly 17 is a radially expanding structure rather than a planar structure.

[0123] The rear end of the second beam wave assembly 33 is connected to the second end of the first beam wave assembly 32 , and the front end of the second beam wave assembly 33 has a second diameter A2 . The rear end of the fourth beam wave assembly 17 facing the window 11 has a third diameter A3 , which is greater than or equal to the second diameter A2 .

[0124] Figure 9 This is a schematic diagram of the structure of the parking brick camera of the present invention. Figure 9 As shown, another embodiment of the present invention further provides a camera 1, comprising:

[0125] A radar apparatus as described above; and

[0126] Camera module 2, which is turned on or off in response to the detection signal of the radar device to capture image information within a preset field of view;

[0127] The window 11 of the radar device faces the parking area, and the preset angle corresponds to outside the range of the parking area.

[0128] The camera module 2 may include a first camera module and a second camera module, wherein the visible area of the first camera module may cover the first parking area, and the visible area of the second camera module may cover the second parking area. Furthermore, the visible areas of the first camera module and the second camera module may have an overlapping area in the horizontal direction.

[0129] As can be seen from the above technical solution, the radar device of this embodiment has a radar cover that constrains the detection wave to be emitted from the window to the outside of the shell in a manner that avoids a preset angle. It can avoid interference objects by changing the transmission direction of the detection wave emitted by the radar component, thereby eliminating the possibility that the interference object will generate interference echoes, and can improve the accuracy of radar detection targets. Furthermore, by concentrating the detection wave to the effective detection area, the detection wave energy in the effective detection area can be increased. Specifically, this embodiment maximizes the collection of the initial transmission beam emitted by the radar component through the first beam component, while eliminating interference from other electronic components on the circuit board, and uses the second beam component to form an effective detection beam area.

[0130] This application proposes a multi-stage baffle beam wave solution, namely: using a cylindrical first beam wave port to maximize the collection of the initial transmission beam while eliminating interference from other electronic devices on the PCB; using a radial horn mouth for secondary beam wave to form an effective detection beam area, and providing a horizontal / vertical third beam wave plate at the end of the horn mouth to reduce the interference of the detection wave at a specific angle, thereby improving the capture rate and accuracy during the vehicle start-stop phase.

[0131] Herein, “a” or “an” does not mean limiting the number of the relevant parts of the present invention to “only one”, and “a” or “an” does not mean excluding the situation where the number of the relevant parts of the present invention is “more than one”.

[0132] Unless otherwise stated, numerical ranges herein include not only the entire range between its two endpoints but also the several sub-ranges contained therein.

[0133] The series of detailed descriptions listed above are merely specific descriptions of feasible implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not depart from the technical spirit of the present invention, such as the combination, division or repetition of features, should be included in the scope of protection of the present invention.

Claims

1. A radar device for a camera (1), characterized in that include: A housing (10), the housing (10) comprising a window (11) located on a front face thereof and an inner cavity (12) communicating with the window (11); A circuit board (20), the circuit board (20) being fixed in the inner cavity (12), and having a radar component (21) for emitting detection waves mounted on a surface of the circuit board (20) facing the window (11); A radome (30), the radome (30) being fixed in the inner cavity (12) and located between the circuit board (20) and the window (11) to constrain the detection wave to be emitted from the window (11) to the outside of the housing (10) at a predetermined angle; Wherein, the radome (30) comprises: a bottom plate (31), the bottom plate (31) being in contact with a surface of the circuit board (20) facing the window (11); a first beam wave component (32), the first beam wave component (32) being formed on a side surface of the bottom plate (31) facing the window (11), and a through hole exposing the radar component (21) being opened from the bottom plate (31) to constrain the detection wave to be along an extension direction of the first beam wave component (32); and a second beam wave assembly (33), the second beam wave assembly (33) being connected to the first beam wave assembly (32) and having a radial cross-sectional shape with a diameter increasing in a direction connecting the circuit board (20) and the window (11), so as to constrain the detection wave to be along a radial direction of the second beam wave assembly (33) within the range of the second beam wave assembly (33); A third beam wave component (34), one or more of the third beam wave components (34) are formed on the inner surface of the peripheral wall (331) of the second beam wave component (33) to constrain the detection wave within the range of the third beam wave component (34) to be along the extension direction of the third beam wave component (34).

2. The radar device according to claim 1, wherein The first beam wave component (32) is formed into a cylindrical shape having a constant first diameter (A1) in its extension direction, a through hole (321) is opened from the bottom plate (31) at its first end to expose the radar component (21), and a second end is connected to the second beam wave component (33).

3. The radar device according to claim 1, wherein The second beam wave assembly (33) comprises a peripheral wall (331) connected to the second end of the first beam wave assembly (32), the peripheral wall (331) enclosing a truncated cone or a truncated cone with a diameter increasing in a direction from the circuit board (20) toward the window (11); The peripheral wall (331) of the second beam wave assembly (33) has a first inclination angle (B1).

4. The radar device according to claim 3, characterized in that The third beam wave assembly (34) has a second inclination angle (B2), and the second inclination angle (B2) is smaller than the first inclination angle (B1).

5. The radar device according to claim 3, characterized in that The third beam wave assembly (34) is formed on the inner surface of the peripheral wall (331) of the second beam wave assembly (33) in the horizontal direction and / or the vertical direction.

6. The radar device according to claim 3, characterized in that The rear end of the second beam wave component (33) is connected to the second end of the first beam wave component (32), and the third beam wave component (34) is adjacent to the front end of the second beam wave component (33); The front end of the third beam wave assembly (34) is flush with the front end of the second beam wave assembly (33), or, The front end of the third beam wave component (34) protrudes from the front end of the second beam wave component (33).

7. The radar device according to claim 1, wherein There is a first gap (D0) between the radome (30) and the viewing window (11), and the first gap (D0) is associated with the wavelength of the detection wave.

8. The radar device according to claim 3, wherein The housing (10) comprises: A fourth beam wave component (17), the fourth beam wave component (17) is formed outside the window (11) and has a radial cross-sectional shape with a diameter increasing in a direction from the window (11) toward the outside of the shell (10), so as to constrain the detection wave to be along the radial direction of the fourth beam wave component (17) within the range of the fourth beam wave component (17).

9. The radar device according to claim 8, characterized in that The fourth beam wave component (17) has a third inclination angle (B4), and the third inclination angle (B4) is greater than or equal to the first inclination angle (B1).

10. The radar device according to claim 8, characterized in that The rear end of the second beam wave component (33) is connected to the second end of the first beam wave component (32), and the front end of the second beam wave component (33) has a second diameter (A2); The rear end of the fourth beam wave component (17) facing the window (11) has a third diameter (A3), and the third diameter (A3) is greater than or equal to the second diameter (A2).

11. A camera (1), characterized in that The camera (1) is fixed to the road surface adjacent to the parking area. The camera (1) has at least one camera module (2) and a radar device built into it; The camera module (2) is configured such that: the visible area of the camera module (2) covers the parking area, and the optical axis of the camera module (2) forms an acute angle with the length direction of the parking area; The radar device is configured such that: the detection area of the radar device at least partially overlaps with the visible area of the camera module (2), so that the camera module (2) can be turned on or off in response to the detection signal of the radar device; The radar device includes a first beam wave component (32), a second beam wave component (33) and a third beam wave component (34), wherein the first beam wave component (32) is formed into a cylindrical shape with a first diameter in its extension direction, the second beam wave component (33) is formed into an open shape with an increasing diameter in its extension direction, the center lines of the first beam wave component (32) and the second beam wave component (33) are collinear, and the third beam wave component (34) has a third arc portion (341) and a third plane portion (342) in its extension direction, and the angle between the third plane portion (342) and the center line of the second beam wave component (33) is determined by the detection area of the radar device; The camera (1) is configured to avoid non-vehicle objects outside the parking area via detection waves constrained by the first beam wave component (32), the second beam wave component (33), and the third beam wave component (34) in sequence, so as to reduce the false alarm rate of triggering the camera module (2) to be turned on in response to the detection signal of the non-vehicle object.

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