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CN-113348373-B - Vehicle object for testing a sensor of a vehicle driver assistance system and method for producing the same

CN113348373BCN 113348373 BCN113348373 BCN 113348373BCN-113348373-B

Abstract

A vehicle target (100) for testing a sensor of a vehicle driver assistance system is described. The vehicle object (100) comprises an outer skin (101) defining an outer geometry of the vehicle object (100), wherein the outer skin (101) at least partially surrounds the inner volume (V i ). The vehicle object (100) further comprises at least one panel (102, 112), the panel (102, 112) comprising a base body (103) and a radar absorbing or reflecting layer (105) attached to the base body (103), wherein the panel (102, 112) is mounted to the outer skin (101) such that at least the radar absorbing or reflecting material/layer (105) has an offset (109) relative to the outer skin (101) in a direction to the interior volume (V i ).

Inventors

  • Reinhard Hafelina
  • MARTIN FRITZ

Assignees

  • 4灵动系统股份有限公司
  • 4灵动系统股份有限公司

Dates

Publication Date
20260421
Application Date
20200302
Priority Date
20200302

Claims (11)

  1. 1. A vehicle target body (100) for testing a sensor of a vehicle driver assistance system, the vehicle target body (100) comprising: an outer skin (101) defining an outer geometry of the vehicle object (100), wherein the outer skin (101) at least partially surrounds an inner volume Vi, At least one panel (102, 112) comprising a substrate (103) and a radar absorbing or reflecting material/layer (105) attached to said substrate (103), Wherein the at least one panel (102, 112) is mounted to the outer skin (101) such that at least the radar absorbing or reflecting material/layer (105) has an offset (109) relative to the outer skin (101) in a direction to the inner volume (Vi), Wherein the radar absorbing or reflecting material/layer (105) is arranged to the base body (103) of the at least one panel (102, 112) at an inner surface (114) of the base body (103) directed towards the inner volume Vi, Wherein the at least one panel (102, 112) comprises a first panel (112), the first panel (112) being arranged between a front wheel portion and a rear wheel portion of the outer skin (101), and Wherein the at least one panel (102, 112) is arranged between a movable bottom platform (120) capable of arranging the vehicle object (100) and the bottom of the outer skin (101) such that the at least one panel (102, 112) is spaced apart from the edge of the outer skin (101) by the offset (109), Wherein the outer surface of the at least one panel (102, 112) is provided with a structure configured to reduce reflection of radar waves, and Wherein the structure is selected from the group consisting of protrusions, grooves, and holes.
  2. 2. The vehicle target (100) according to claim 1, Wherein the at least one panel (102, 112) is detachably coupled to the outer skin (101) or the inner support structure of the vehicle target body (100) by means of respective detachable fixation elements.
  3. 3. The vehicle target (100) according to claim 1, Wherein the substrate (103) of the at least one panel (102, 112) is at least partially transparent to waves (111).
  4. 4. The vehicle target (100) according to claim 1, Wherein the outer surface (113) of the at least one panel (102, 112) is wavy.
  5. 5. The vehicle target (100) according to claim 1, Wherein an outer surface (113) of the at least one panel (102, 112) directed towards the environment of the vehicle target (100) has a grey and/or a matte color.
  6. 6. The vehicle target (100) according to claim 5, Wherein the inner surface (114) is the surface opposite the outer surface (113).
  7. 7. The vehicle target (100) according to claim 6, Wherein the base body (103) comprises a side surface (115) connecting the inner surface (114) and the outer surface (113) of the base body (103), Wherein the radar absorbing or reflecting material/layer (105) is arranged on the side surface (115) of the substrate (103).
  8. 8. The vehicle target (100) according to claim 1, Wherein the radar absorbing or reflecting material/layer (105) extends non-parallel with respect to the vertical direction.
  9. 9. The vehicle target (100) according to claim 1, Wherein the outer skin (101) comprises a wheel portion comprising an optical representation of a real wheel, Wherein the outer skin (101) comprises a gap (116) around the wheel portion for representing a wheel arch, and Wherein the at least one panel (102, 112) further comprises a second panel (102), the second panel (102) being mounted to the wheel portion and/or an inner surface of the outer skin (101) opposite the wheel portion in the gap (116).
  10. 10. The vehicle target (100) according to claim 1, Wherein the at least one panel (102, 112) further comprises a second panel (102), the second panel (102) being arranged to the bottom surface of the vehicle target body (100) and extending between two opposite sides of the vehicle target body (100).
  11. 11. A method of manufacturing a vehicle target body (100) for testing a sensor of a vehicle driver assistance system, the method comprising: Providing an outer skin (101) defining an outer geometry of the vehicle object (100), wherein the outer skin (101) at least partially surrounds an inner volume Vi, and Attaching at least one panel (102, 112) comprising a substrate (103) and a radar absorbing or reflecting material/layer (105) to said substrate (103), Wherein the at least one panel (102, 112) is mounted to the outer skin (101) such that at least the radar absorbing or reflecting material/layer (105) has an offset (109) relative to the outer skin (101) in a direction to the inner volume Vi, Wherein the radar absorbing or reflecting material/layer (105) is arranged to the base body (103) of the at least one panel at an inner surface (114) of the base body (103) directed towards the inner volume Vi, Wherein the at least one panel (102, 112) comprises a first panel (112), the first panel (112) being arranged between a front wheel portion and a rear wheel portion of the outer skin (101), and Wherein the at least one panel (102, 112) is arranged between a movable bottom platform (120) capable of arranging the vehicle object (100) and the bottom of the outer skin (101) such that the at least one panel (102, 112) is spaced apart from the edge of the outer skin (101) by the offset (109), Wherein the outer surface of the at least one panel (102, 112) is provided with a structure configured to reduce reflection of radar waves, and Wherein the structure is selected from the group consisting of protrusions, grooves, and holes.

Description

Vehicle object for testing a sensor of a vehicle driver assistance system and method for producing the same Technical Field The present invention relates to a vehicle target for testing sensors of a vehicle driver assistance system. The invention further relates to a method for producing a vehicle object for testing a sensor of a vehicle driver assistance system. Background Collision objects, such as vehicle targets, for testing sensors of a vehicle driver assistance system are typically very light in weight and have a hollow structure with an interior volume. The vehicle target is movable and traverses a predetermined path of the vehicle including the driver assistance system to be tested. The vehicle target is mounted to the drivable platform by a support structure disposed in a space between a bottom surface of the vehicle target and the platform surface. Thus, there is no free space between the bottom of the vehicle target and the surface of the drivable platform. In contrast, however, real vehicles are arranged on streets by wheels, wherein free areas are provided between the wheels, the vehicle bottom and the streets. In order to avoid confusion of radar sensors, such as sensor systems of a vehicle driver assistance system, by the design of the vehicle object, in particular by internal reflection of waves, in particular optical and/or radar waves, from the interior of the vehicle object of the hollow structure of the vehicle object, the lower/bottom region of the vehicle object is covered by a plate-like element/panel, for example comprising radar absorbing or reflecting material/layer. However, the shadow shape of the body portion of a free space object vehicle differs from a real vehicle because there is no longer a free space object between the floor and the platform of the street or vehicle object. Thus, the sensor system of the vehicle driver assistance system may be confused. Disclosure of Invention Thus, it may be desirable to provide a more realistic vehicle target for testing driver assistance systems. Such a need is not for example a vehicle object for testing a sensor of a vehicle driver assistance system and a corresponding method of producing a vehicle object according to the independent claims. According to a first aspect of the present invention, a vehicle target for testing a sensor of a vehicle driver assistance system is provided. The vehicle target body includes an outer skin defining an exterior geometry of the vehicle target body, wherein the outer skin at least partially surrounds the interior volume. The legal target further includes at least one panel including a substrate (basic body) and a radar absorbing or reflecting layer attached to the substrate. The panel is mounted to the outer skin such that at least the radar absorbing or reflecting material/layer has an offset relative to the outer skin in a direction to the interior volume. According to another aspect, a method of manufacturing the above-described vehicle target body is provided. The vehicle target includes an outer skin defining an exterior geometry of the vehicle target. The skin defines an outer shell of the vehicle target. The outer skin may be made of a plurality of self-supporting foam panels that are mounted together to form a desired shape and design that represents, for example, the outer skin of an automobile. The vehicle target is arranged on a movable bottom platform configured to be driven along a ground surface. Between the bottom platform and the underside of the vehicle target, the panel may be arranged, for example, between the front wheel portion and the rear wheel portion. The outer skin further comprises a transparent part, for example for simulating a vehicle window or a vehicle lamp. Furthermore, the outer skin may comprise a wheel part simulating a real wheel of the vehicle. The real part may simply optically show a wheel that does not rotate. The wheel part may be produced, for example, by painting or by means of a sticker which is glued onto the outer surface of the outer skin. Between the wheel part and the surrounding part of the outer skin, a gap may be formed, for example, by a groove, wherein the wheel arch may be simulated along the outer circumference, for example, by paint, decal or by an additional foam element. For example, additional elements such as reflectors simulating vehicle lighting may be arranged to the outer skin. The outer skin may be mounted to an inner support structure comprising beams mounted to a drivable platform, for example. The panel includes a substrate to which a radar absorbing or reflecting layer is attached. If the layer is made of an absorbing material, radar waves can be absorbed. It is thus ensured that no radar waves are reflected by, for example, the internal support structure of the vehicle object, which secures the vehicle object to the platform or the like. For example, if no panel or transmissive panel is used under the outer skin, the radar waves