Vehicle radar correction system

Abstract

The utility model provides a radar correction system for a vehicle, which can improve the correction accuracy of a correction device used by the radar correction system for the vehicle. A radar correction system for a vehicle includes: a radar device provided on a vehicle to emit radio waves; a target device configured in a flat plate shape and provided corresponding to the radar device; the correction device is connected with the radar device and receives reflected waves formed after the electric waves are reflected by the target device so as to adjust the detection axis of the radar device according to the reflected waves, and an electric wave absorber is arranged on the periphery of the target device.

Description

Technical Field

[0001] The utility model relates to a radar calibration system for vehicles. Background Art

[0002] In recent years, efforts have been actively made to provide access to sustainable transportation systems that also consider people in vulnerable positions among traffic participants. To achieve the above object, research and development related to autonomous driving technology, driving assistance technology, and preventive safety technology are being carried out to further improve traffic safety or convenience. Generally, in vehicle autonomous driving technology, driving assistance technology, and preventive safety technology, vehicles are equipped with radar devices to identify the surrounding environment (such as road signs, the distance between the vehicle and adjacent vehicles, the distance between the vehicle and surrounding buildings, etc.) to assist the vehicle in driving on the road. However, in autonomous driving technology, driving assistance technology, and preventive safety technology, the calibration accuracy of radar devices is an issue.

[0003] Specifically, in the prior art, in order to ensure the normal operation of the radar device, the detection axis of the radar device must be calibrated in advance before the vehicle leaves the factory. In a vehicle radar calibration system, for example, the radar device emits radio waves to a target device provided around the vehicle, and after the radio waves of the radar device are reflected by the surface of the target device, the calibration device adjusts the detection axis of the radar device according to the reflected wave. However, such a method may reduce the calibration accuracy of the calibration device used in the vehicle radar calibration system due to detecting objects around the target device. Thus, it is necessary to improve the vehicle radar calibration system.

[0004] The utility model aims to solve the above problems and achieve the goal of improving the calibration accuracy of the calibration device used in the vehicle radar calibration system. Moreover, it further contributes to the development of sustainable transportation systems.

[0005] [Prior Art Documents]

[0006] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Laid-Open No. 2003-170794 Summary of the Utility Model

[0008] The utility model provides a vehicle radar calibration system, which can improve the calibration accuracy of the calibration device used in the vehicle radar calibration system.

[0009] The radar calibration system for vehicles of the present utility model includes: a radar device disposed on a vehicle to emit radio waves; a target device configured in a flat plate shape and disposed corresponding to the radar device; and a calibration device connected to the radar device and receiving a reflected wave formed after the radio waves are reflected by the target device, and adjusting a detection axis of the radar device according to the reflected wave, wherein a radio wave absorber is provided on an outer periphery of the target device.

[0010] In an embodiment of the present utility model, the target device is supported by a structure, and the radio wave absorber is provided at least on an outer periphery of a side where the structure of the target device is located.

[0011] In an embodiment of the present utility model, the radio wave absorber has a concave portion formed by a concavo-convex structure, and the radio wave absorber is arranged such that the concave portion is in the same plane as a surface of the target device.

[0012] In an embodiment of the present utility model, the radio wave absorber has a concave portion formed by a concavo-convex structure, and the radio wave absorber is arranged such that the concave portion is in a back direction with respect to the surface of the target device.

[0013] Based on the above, the radar calibration system for vehicles of the present utility model includes a target device with a radio wave absorber provided on its outer periphery. Thus, the radio wave absorber can absorb radio waves on the outer periphery of the target device, thereby being able to suppress the reflected wave detected by the calibration device and reflected by an object around the target device from affecting the calibration accuracy. Accordingly, the radar calibration system for vehicles of the present utility model can improve the calibration accuracy of the calibration device used in the radar calibration system for vehicles.

[0014] To make the above features and advantages of the present utility model more obvious and understandable, specific embodiments are hereinafter given and described in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0015] Figure 1 is an application schematic diagram of the radar calibration system for vehicles in an embodiment of the present utility model applied to a vehicle;

[0016] Figure 2 is Figure 1 a side view schematic diagram of the target device used in the radar calibration system for vehicles shown;

[0017] Figure 3 is Figure 1 a side view schematic diagram of the target device used in the radar calibration system for vehicles in other deformation examples shown.

[0018] Description of the Reference Numerals

[0019] 50: Vehicle;

[0020] 100: Vehicle radar calibration system;

[0021] 110: Radar device;

[0022] 112: Detection axis;

[0023] 120: Target device;

[0024] 122: Surface;

[0025] 130: Calibration device;

[0026] 140, 140A: Radio wave absorber;

[0027] 142, 142A: Concave portion;

[0028] 144: Convex portion;

[0029] 146: Substrate;

[0030] 150: Structure;

[0031] RW: Reflected wave;

[0032] W: Radio wave. Detailed implementation mode

[0033] Now, a demonstration embodiment of the present utility model will be described in detail, and examples of the demonstration embodiment are illustrated in the accompanying drawings. Among them, Figure 1 is an application schematic diagram of the vehicle radar calibration system according to an embodiment of the present utility model applied to a vehicle, Figure 2 is Figure 1 a side view schematic diagram of the target device used in the vehicle radar calibration system shown, Figure 3 is Figure 1 a side view schematic diagram of the target device used in the vehicle radar calibration system in other deformation examples shown. The following will be described in conjunction with Figures 1 to 3 to illustrate the specific structure and deformation examples of the vehicle radar calibration system 100 of this embodiment, but the present utility model is not limited thereto.

[0034] Please refer to Figure 1 and Figure 2 , in this embodiment, the vehicle radar calibration system 100 includes a radar device 110, a target device 120, and a calibration device 130. The radar device 110 is disposed on the vehicle 50 to transmit radio waves W. The target device 120 is configured in a flat plate shape and is disposed corresponding to the radar device 110. The calibration device 130 is connected to the radar device 110 and receives the reflected wave RW formed after the radio wave W is reflected by the target device 120, and adjusts the detection axis 112 of the radar device 110 according to the reflected wave RW. Furthermore, a radio wave absorber 140 is provided on the outer periphery of the target device 120 (such as Figure 2as shown).

[0035] Specifically, in this embodiment, the radar devices 110 are arranged at the four corners of the vehicle 50 to transmit radio waves W. However, the radar devices 110 are not limited to being arranged at the corners and can also be arranged at other appropriate positions on the vehicle 50. The number of the radar devices 110 is not limited to four either and can be adjusted to other appropriate numbers according to actual needs. The target device 120 is, for example, a flat plate having a surface 122 configured as a plane, and is arranged opposite to the radar device 110 in a one-to-one manner and substantially in a straight line (also taking the arrangement of four as an example here). Thus, the target device 120 can reflect the radio waves W emitted by the radar device 110. The calibration device 130 is arranged opposite to the target device 120 in a one-to-one manner and substantially in a straight line (also taking the arrangement of four as an example here) so as to receive the reflected wave RW to adjust the detection axis 112 of the radar device 110. The specific adjustment method and principle of the detection axis 112 can adopt, for example, the existing technology and will not be elaborated here.

[0036] Furthermore, in this embodiment, the outer periphery of the target device 120 refers to, for example, the peripheral area other than the surface 122 for reflecting radio waves W on the flat plate of the target device 120. In this way, the radio wave absorber 140 can absorb the radio waves falling on the peripheral area other than the surface 122 of the target device 120, so that the radio waves falling on the peripheral area other than the surface 122 of the target device 120 will not be reflected by the components around the target device 120 to the calibration device 130. It can be seen from this that the vehicle radar calibration system 100 includes the target device 120 with the radio wave absorber 140 provided on its outer periphery. Thus, the radio wave absorber 140 can absorb the radio waves on the outer periphery of the target device 120, thereby being able to suppress the calibration device 130 from detecting the reflected waves reflected by the objects around the target device 120 and affecting the calibration accuracy. Accordingly, the vehicle radar calibration system 100 can improve the calibration accuracy of the calibration device 130 used in the vehicle radar calibration system 100.

[0037] Furthermore, please refer to Figure 2 , in this embodiment, the target device 120 is supported by the structure body 150, and the radio wave absorber 140 is at least provided on the outer periphery of the side where the structure body 150 of the target device 120 is located. That is to say, the target device 120 is supported by the structure body 150 and is arranged opposite to the radar device 110 (that is, supported by the structure body 150 at the same horizontal height corresponding to the radar device 110). And, the side of the target device 120 connected to the structure body 150 (at Figure 2On the outer periphery of the lower side (the lower side in the drawing) of the target device 120, there is an electromagnetic wave absorber 140. In this way, the arrangement of the electromagnetic wave absorber 140 does not affect the reflection of the electromagnetic wave W by the surface 122 of the target device 120, and the electromagnetic wave absorber 140 can absorb the electromagnetic waves on the outer periphery of the side where the structure 150 of the target device 120 is located, thereby suppressing the correction device 130 from detecting the reflected waves reflected by the structure 150 around the target device 120 and affecting the correction accuracy. However, the present utility model does not limit the installation position of the electromagnetic wave absorber 140, as long as the electromagnetic wave absorber 140 is arranged on the outer periphery of the target device 120 without affecting the reflection function of the target device 120 and can absorb the reflected waves reflected by surrounding objects, its installation position can be adjusted according to requirements.

[0038] Furthermore, in this embodiment, as Figure 2 shown, the electromagnetic wave absorber 140 has a concave portion 142 formed by a concavo-convex structure, and the electromagnetic wave absorber 140 is arranged such that the concave portion 142 is in the same plane as the surface 122 of the target device 120. That is to say, the electromagnetic wave absorber 140 has a concavo-convex structure facing the radar device 110 to facilitate the absorption of the electromagnetic waves emitted from the radar device 110. Here, although the convex portion 144 of the concavo-convex structure is shown as triangular, it is not limited thereto. And the bottom surface of the concave portion 142 formed by the concavo-convex structure is located on the extension surface of the surface 122 of the target device 120 (as shown by the dotted line in Figure 2 ). In this way, the formation of the corner between the surface 122 of the target device 120 and the electromagnetic wave absorber 140 (formed by the edge between the base 146 of the electromagnetic wave absorber 140 and the concave portion 142 protruding from the surface 122 of the target device 120) can suppress the correction device 130 from detecting the reflected waves reflected by the corners around the target device 120 and affecting the correction accuracy, and can effectively improve the correction accuracy. However, the present utility model does not limit the specific structure of the electromagnetic wave absorber 140, as long as the electromagnetic wave absorber 140 is arranged on the outer periphery of the target device 120 without affecting the reflection function of the target device 120 and can absorb the reflected waves reflected by surrounding objects, its specific structure can be adjusted according to requirements.

[0039] Similarly, in the Figure 3 shown modification, the electromagnetic wave absorber 140A has a concave portion 142A formed by a concavo-convex structure, and the electromagnetic wave absorber 140A is arranged such that the concave portion 142A is in the back direction relative to the surface 122 of the target device 120. That is to say, the electromagnetic wave absorber 140A has a concavo-convex structure facing the radar device 110 to facilitate the absorption of the electromagnetic waves emitted from the radar device 110. And the bottom surface of the concave portion 142A formed by the concavo-convex structure is relative to the extension surface of the surface 122 of the target device 120 (as shown by the dotted line in Figure 3is more located on the back surface of the target device 120 as shown by the dashed line). In this way, no corner is formed between the surface 122 of the target device 120 and the radio wave absorber 140A, so that the calibration device 130 will not detect the reflected wave reflected by the corner around the target device 120 and affect the calibration accuracy, and the calibration accuracy can be effectively improved. However, the specific structure of the radio wave absorber 140A is not limited in the present utility model. As long as the radio wave absorber 140A is arranged on the outer periphery of the target device 120 without affecting the reflection function of the target device 120 and can absorb the reflected wave reflected by the surrounding objects, its specific structure can be adjusted according to requirements.

[0040] In summary, the vehicle radar calibration system of the present utility model includes a target device provided with a radio wave absorber on its outer periphery. Thus, the radio wave absorber can absorb the radio waves on the outer periphery of the target device, so that it can inhibit the calibration device from detecting the reflected wave reflected by the surrounding objects of the target device and affecting the calibration accuracy. In addition, the radio wave absorber has a concave portion formed by a concave-convex structure, and the radio wave absorber is arranged such that the concave portion is in the same plane as the surface of the target device or is located in the back direction with respect to the surface of the target device, thereby reducing the formation of corners between the surface of the target device and the radio wave absorber, and effectively improving the calibration accuracy. Accordingly, the vehicle radar calibration system of the present utility model can improve the calibration accuracy of the calibration device used in the vehicle radar calibration system.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A vehicle radar calibration system, characterized in that: include: A radar device, mounted on a vehicle to transmit radio waves; A target device is formed in a flat plate shape and is arranged corresponding to the radar device; as well as A calibration device is connected to the radar device and receives a reflected wave formed after the radio wave is reflected by the target device, so as to adjust the detection axis of the radar device according to the reflected wave, wherein An electromagnetic wave absorber is provided on the periphery of the target device.

2. The vehicle radar calibration system according to claim 1, characterized in that: The target device is supported by a structure, and The radio wave absorber is provided at least on the outer periphery of the target device on the side where the structure is located.

3. The vehicle radar calibration system according to claim 1 or 2, characterized in that: The radio wave absorber has a concave portion formed by a concavo-convex structure, and the radio wave absorber is arranged so that the concave portion is flush with the surface of the target device.

4. The vehicle radar calibration system according to claim 1 or 2, characterized in that: The radio wave absorber has a concave portion formed by a concavo-convex structure, and the radio wave absorber is arranged so that the concave portion is located in a rear direction with respect to a surface of the target device.

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