WO2017125477A1 - Antenna module for a motor vehicle, driver assistance system as well as motor vehicle - Google Patents

Antenna module for a motor vehicle, driver assistance system as well as motor vehicle Download PDF

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Publication number
WO2017125477A1
WO2017125477A1 PCT/EP2017/051057 EP2017051057W WO2017125477A1 WO 2017125477 A1 WO2017125477 A1 WO 2017125477A1 EP 2017051057 W EP2017051057 W EP 2017051057W WO 2017125477 A1 WO2017125477 A1 WO 2017125477A1
Authority
WO
WIPO (PCT)
Prior art keywords
camera
antenna
motor vehicle
housing
antenna module
Prior art date
Application number
PCT/EP2017/051057
Other languages
French (fr)
Inventor
Carol Grimes
Colin Patrick Hehir
Original Assignee
Connaught Electronics Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Connaught Electronics Ltd. filed Critical Connaught Electronics Ltd.
Publication of WO2017125477A1 publication Critical patent/WO2017125477A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
    • H01Q1/1214—Supports; Mounting means for fastening a rigid aerial element through a wall
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/04—Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome

Definitions

  • the invention relates to an antenna module for a motor vehicle comprising at least one antenna for an infotainment system of the motor vehicle, an antenna housing for attaching to an exterior trim part of the motor vehicle and a camera with a camera objective for capturing an environmental region of the motor vehicle, wherein the at least one antenna is disposed in an interior of the antenna housing.
  • the invention relates to a driver assistance system with an antenna module as well as to a motor vehicle with a driver assistance system.
  • Camera-based driver assistance systems for motor vehicles for example for monitoring an environmental region of the motor vehicle, are already known from the prior art.
  • cameras are attached to exterior trim parts of the motor vehicle for example to capture the environmental region of the motor vehicle in images.
  • the images representing the environmental region, captured by the cameras can be provided to the driver assistance system of the motor vehicle.
  • a roof antenna can for example be a shark fin antenna, in the antenna housing of which the camera and the antenna are integrated.
  • the antenna and electronics for the antenna are also disposed besides the camera.
  • the interior has a low installation space for the camera. Since the camera usually produces waste heat in the operation, it can occur that the camera overheats and is no longer functional.
  • An antenna module according to the invention for a motor vehicle comprises at least one antenna for an infotainment system of the motor vehicle, an antenna housing for attaching to an exterior trim part of the motor vehicle and a camera with a camera objective for capturing an environmental region of the motor vehicle.
  • the at least one antenna is disposed in an interior of the antenna housing.
  • the camera is disposed in the interior of the antenna housing at least in certain areas.
  • the antenna module comprises at least one thermally conducting device, which is thermally coupled to the camera and can be thermally coupled to a chassis of the motor vehicle for dissipating the heat produced by the camera to the chassis of the motor vehicle.
  • the at least one antenna of the antenna module By means of the at least one antenna of the antenna module, signals for the infotainment system of the motor vehicle can be emitted and/or received.
  • the infotainment system can for example be a car radio and/or a navigation system and/or a driver assistance system, which for example performs assistance functions based on vehicle data emitted and/or received via car-to-car communication (Car2Car communication).
  • the antenna module can for example have a radio antenna and/or a GPS antenna and/or an antenna for the car-to-car communication as the at least one antenna.
  • the at least one antenna is in particular completely disposed in the antenna housing, wherein the antenna housing forms a radome for the at least one antenna at least in certain areas.
  • the antenna housing can for example be attached to a roof of the motor vehicle.
  • the camera with the camera objective is integrated in the antenna housing.
  • the camera is disposed in the interior of the antenna housing at least in certain areas.
  • the antenna housing can for example have a passage opening corresponding to the camera objective for the camera objective.
  • the passage opening can be formed as a hole in the housing wall of the antenna housing, in which the camera objective is disposed at least in certain areas such that a lens disposed on the front side on the camera objective faces the environmental region.
  • the camera can be disposed such that the camera objective is inserted into the passage opening from the interior of the antenna housing such that the camera can capture the environmental region of the motor vehicle.
  • Electronics of the camera for example an image sensor and electronic components for image processing, are in particular completely disposed in the interior of the antenna housing. Thus, viewed from the environmental region, only the camera objective, in particular only the lens of the camera objective, is visible.
  • the antenna module has the at least one thermally conducting device.
  • the thermally conducting device is thermally coupled to the camera and can be thermally coupled to the frame or chassis of the motor vehicle.
  • the thermally conducting device is adapted to deliver or conduct the heat produced by the camera in the operation to the chassis or the frame of the motor vehicle.
  • the at least one thermally conducting device can be thermally coupled to the exterior trim part, via which the waste heat is delivered to the chassis or the frame of the motor vehicle.
  • the thermally conducting device can for example be in contact with the exterior trim part in an intended installation position of the antenna module on the exterior trim part of the motor vehicle such that the heat is dissipated via the exterior trim part to the frame of the motor vehicle.
  • the camera can be advantageously prevented that the camera overheats and a high functionality of the camera can be ensured.
  • an environment of the camera thus, for example the interior of the antenna housing, heats up and thereupon for example the at least one antenna and/or electronics of the at least one antenna, which can also be disposed in the interior of the antenna housing, overheat.
  • the at least one thermally conducting device is adapted to retain the camera in the interior of the antenna housing.
  • the thermally conducting device does not only serve for dissipating the waste heat, but also for retaining the camera in the antenna housing.
  • the camera is attached in and/or on the camera housing by means of the thermally conducting device.
  • the thermally conducting device additionally forms a retaining device and therefore is configured in multifunctional manner.
  • the at least one thermally conducting device comprises a first thermally conducting element thermally coupled to the camera and a separate second thermally conducting element thermally coupled to the first thermally conducting element, which can be coupled to the chassis for heat dissipation.
  • the thermally conducting device is two-part formed.
  • the at least one thermally conducting device can therefore be particularly flexibly disposed in the antenna housing such that the at least one thermally conducting device can be integrated in the antenna module in particularly good and space saving manner.
  • the camera comprises a camera housing, wherein the first thermally conducting element is formed integrally with the camera housing.
  • the camera housing is a separate housing different from the antenna housing, which is in particular completely disposed in the interior of the antenna housing.
  • the camera housing can for example be a cast housing, which has the first thermally conducting element.
  • the camera housing can have a rear housing for electronics of the camera and a front housing for retaining the camera objective of the camera, wherein the camera housing is disposed in the interior of the antenna housing.
  • a circuit board with an image sensor and with components for image processing can be disposed.
  • the rear housing which is for example prismatic formed, can have an interface for connecting to a control device of a driver assistance system on a rear side, via which the images captured by the camera can be provided to the control device.
  • the rear housing On the front side, the rear housing can be covered by the front housing.
  • the front housing which is also referred to as lens housing, can for example be plate-shaped formed and have a passage opening for the camera objective.
  • the camera objective can for example be glued into the passage opening and thus be retained by the front housing.
  • the first thermally conducting element can for example be disposed on a sidewall of the rear housing.
  • the waste heat is therefore delivered to the second thermally conducting element via the camera housing and the first thermally conducting element integrally formed with the camera housing and dissipated to the chassis from the second thermally conducting element.
  • the first thermally conducting element is disposed on the camera housing such that it faces the exterior trim part at least in certain areas in an intended installation position of the antenna module on the exterior trim part of the motor vehicle.
  • the waste heat can be particularly fast dissipated to the chassis, in particular without heating up the interior of the antenna housing.
  • the camera housing and the first thermally conducting element are formed of aluminum.
  • the camera housing formed of aluminum the electronics of the camera is surrounded by a shielding material.
  • antenna radiation of the at least one antenna can be shielded from the electronics of the camera.
  • the camera can be disposed in the interior of the antenna housing near the at least one antenna, wherein the electronics of the camera is protected from disturbing influences by the antenna radiation.
  • aluminum has high thermal conductivity and thereby is particularly well suited for the first thermally conducting element in particular formed integrally with the antenna housing.
  • the camera housing formed of aluminum thus serves for shielding as well as for heat dissipation.
  • high functionality of the camera can be provided in particularly simple manner.
  • the second thermally conducting element is formed as a mechanical fixing element, via which the camera is retained in the interior of the antenna housing and via which the camera can be thermally coupled to the chassis.
  • the camera in particular the camera housing, is fixed or retained in the interior of the antenna housing by means of the mechanical fixing element.
  • the camera is mechanically connected to the antenna housing by means of the fixing element.
  • the mechanical fixing element thus serves both for retaining the camera in the interior of the antenna housing and for dissipating the heat to the chassis.
  • the mechanical fixing element which is in particular formed of aluminum, is thermally coupled to the first thermally conducting element and thereby to the camera housing and can for example be in contact with the exterior trim part in an intended installation position of the antenna module on the motor vehicle such that the waste heat can be delivered to the exterior trim part.
  • the second thermally conducting element formed as the fixing element can also serve for fixing the antenna housing to the exterior trim part.
  • the antenna housing is thermally coupled to the exterior trim part and the camera is thermally coupled to the exterior trim part at the same time.
  • the antenna module is particularly simply configured since separate heat dissipating devices, for example cooling fins or thermally conducting pads, do not have to be provided, which have to be expensively integrated in the antenna housing.
  • the first thermally conducting element is formed as a connecting element corresponding to the mechanical fixing element, wherein the connecting element and the fixing element are disposed engaging with each other for mechanical and thermal coupling.
  • the first thermally conducting element and the second thermally conducting element are in particular connected in form-fit manner and thus form the retaining device in addition to the thermally conducting device.
  • the antenna module comprises a plate-shaped support for the at least one antenna and for electronics of the at least one antenna, wherein the camera is mechanically connected to the support via the mechanical fixing element.
  • the plate-shaped support is in particular formed as a circuit board and thus constitutes a so- called antenna PCB (PCB- printed circuit board).
  • PCB PCB- printed circuit board
  • the antenna housing can for example have a roof-shaped cover, which forms a radome for the at least one antenna and which is connected to the plate-shaped support.
  • a rear side of the plate-shaped support faces the exterior trim part in the intended installation position of the antenna module, wherein the plate-shaped support can be disposed on the exterior trim part by means of the fixing element.
  • the at least one antenna, the electronics for the at least one antenna and the camera housing are disposed on a front side of the support opposing the rear side of the support and are therein covered by the roof-shaped cover.
  • the mechanical fixing element is formed as a screw.
  • the second thermally conducting element in the form of the screw thus also serves for fixing the camera housing to the antenna housing, for example to the support.
  • the first thermally conducting element can for example be formed as an angular connector, wherein one leg of the angular connector is disposed on the camera housing and a second leg of the angular connector for example rests on the front side of the plate- shaped support.
  • the second leg can have a hole for forming the engagement with the screw.
  • the plate-shaped support can have a hole for the screw, through which the screw engaging with the angular connector is inserted and thereby the camera housing is fixed to the support.
  • the screw in particular a screw boss, can be passed through the support and protrude beyond the rear side on the rear side facing the exterior trim part.
  • the screw can be thermally coupled to the frame of the motor vehicle for example by the screw protruding beyond the rear side of the support being in contact with the exterior trim part and/or the frame.
  • the antenna module is formed as a shark fin antenna module.
  • a rear wall of the antenna housing can for example have the passage opening for the camera objective. This rear wall faces a rearward environmental region of the motor vehicle in an intended installation position of the antenna module such that the camera can capture the rearward environmental region.
  • the invention relates to a driver assistance system with an antenna module according to the invention.
  • the images captured by the camera can be provided to the driver assistance system.
  • the driver assistance system can for example be formed as a reversing assistant.
  • the driver assistance system allows so-called mirror-less driving.
  • the environmental region in particular the rearward environmental region located behind the motor vehicle, is captured in images.
  • the images are displayed on a display device of the driver assistance system, which is in particular disposed in a passenger cabin of the motor vehicle such that a driver of the motor vehicle can capture the rearward environmental region by looking at the display device.
  • a motor vehicle according to the invention includes a driver assistance system according to the invention.
  • the motor vehicle is in particular formed as a passenger car.
  • the motor vehicle is formed without rearview mirrors.
  • rearview mirrors of the motor vehicle for example exterior mirrors and interior mirrors of the motor vehicle, are replaced by the antenna module with the camera.
  • the antenna module which is preferably disposed on a roof of the motor vehicle, is therein in particular oriented such that the camera can capture the rearward environmental region in images.
  • the images of the rearward environmental region captured by the camera are presented on the display device for the driver, as already described.
  • Fig. 1 a schematic illustration of an embodiment of a motor vehicle according to the invention
  • FIG. 2 a schematic illustration of a camera of an antenna module according to the invention in an exploded representation
  • Fig. 3 a schematic illustration of an embodiment of the antenna module according to the invention.
  • Fig. 4 a schematic illustration of the antenna module according to Fig. 3.
  • Fig. 1 shows a motor vehicle 1 according to the present invention.
  • the motor vehicle 1 is in particular formed as a passenger car.
  • the motor vehicle 1 includes a driver assistance system 2.
  • the driver assistance system 2 includes an antenna module 3, which is disposed on an exterior trim part 4 of the motor vehicle 1 .
  • the antenna module 3 is disposed on a roof of the motor vehicle 1 .
  • the antenna module 3 includes at least one antenna 5, which emits and/or receives signals for an infotainment system of the motor vehicle 1 .
  • the infotainment system of the motor vehicle 1 can for example be a car radio, a navigation system or the like.
  • the antenna module 3 has an antenna housing 6, which is attached to the exterior trim part 4 for disposing the antenna module 3 on the exterior trim part 4.
  • the antenna housing 6 is formed in the shape of a shark fin.
  • the antenna module 3 is in particular formed as a shark fin antenna module.
  • the at least one antenna 5 is disposed in an interior of the antenna housing 6.
  • the antenna module 3 has a camera 7, which is disposed in the interior of the antenna housing 6 at least in certain areas.
  • the camera 7 is adapted to capture an environmental region 8 of the motor vehicle 1 in images. In particular, the camera 7 captures a rearward environmental region 8 or an environmental region 8 behind the motor vehicle 1 .
  • the images captured by the camera 7 can be provided to a control device 9 of the driver assistance system 2.
  • the control device 9 can for example be formed by a vehicle-side controller.
  • the images captured by the camera 7 can for example be displayed on a display device of the driver assistance system 2 not illustrated here in a passenger cabin of the motor vehicle 1 .
  • rearview mirrors of the motor vehicle 1 can be replaced by the driver assistance system 2 and so- called mirror-less driving can be allowed.
  • the motor vehicle 1 is in particular formed without rearview mirrors.
  • Fig. 2 shows the camera 7 of the antenna module 3 in an exploded representation.
  • the camera 7 includes a camera objective 10 with a camera lens 1 1 and with an objective tube 12.
  • the objective tube 12 is in particular cylindrically formed, wherein the lens 1 1 is disposed on the front side on the objective tube 12.
  • the objective 10 has a retaining element 13 as well as a cap element 14.
  • the camera 7 includes a camera housing 15, which has a rear housing 16 as well as a front housing 17.
  • the rear housing 16 is in particular prismatic formed and covered on the front side by the front housing 17, which is in particular plate-shaped formed.
  • electronics here illustrated as a circuit board 18 can be disposed.
  • the circuit board 18 can be attached to the front housing 17 by means of fixing elements 19, for example screws.
  • the circuit board 18 can for example have an image sensor and components for image processing of the images captured by the image sensor of the camera 7.
  • the front housing 17 is also referred to as lens housing and serves for retaining the camera objective 10.
  • the front housing 17 has a passage opening 20, in which the camera objective 10 can be disposed in certain areas.
  • the retaining element 13 is disposed in the passage opening 20 such that the cap element 14 rests on a border 21 of the passage opening 20.
  • the cap element 14 can be attached to the border 21 of the passage opening 20 by means of an adhesive 22 such that the objective 10 is retained on the front housing 17 and thereby on the camera housing 15.
  • Fig. 3 shows a section of an embodiment of the antenna module 3 according to the invention.
  • the antenna module 3 has a GPS antenna 5a as well as a car-to-car communication antenna 5b as the at least one antenna 5.
  • the antennas 5a, 5b are disposed in the interior of the antenna housing 6.
  • the antenna module 3 has a plate-shaped support 23, to which the antennas 5a, 5b are attached.
  • the plate-shaped support 23 is in particular a circuit board and forms a so-called antenna PCB.
  • the antenna module 3 has at least one thermally conducting device 24, which is adapted to conduct or dissipate the heat produced by the camera 7 in the operation to a chassis 25 of the motor vehicle 1 .
  • the thermally conducting device 24 is thermally coupled to the camera 7 and for example can be thermally coupled to the exterior trim part 4. Thereby, the waste heat of the camera 7 can be dissipated to the chassis 25 or the frame of the motor vehicle 1 via the exterior trim part 4.
  • the thermally conducting device 24 is two-part formed.
  • the thermally conducting device 24 has a first thermally conducting element 26, which is here formed integrally with the camera housing 15.
  • the camera housing 15 can for example be a cast housing.
  • the first thermally conducting element 26 and the camera housing 15 are in particular formed of aluminum.
  • the electronics 18 of the camera 7 is therefore surrounded by a shielding material in the form of aluminum. Thereby, the radiation of the antennas 5a, 5b can be shielded from the electronics 18 of the camera 7.
  • the thermally conducting element 26 is thermally coupled to the camera 7.
  • the thermally conducting device 24 has a second thermally conducting element 27, which is thermally coupled to the first thermally conducting element 26 and can be coupled to the chassis 25.
  • the second thermally conducting element 27 is additionally mechanically coupled to the first thermally conducting element 26 by the first thermally conducting element 26 and the second thermally conducting element 27 engaging with each other.
  • the first thermally conducting element 26 is therefore formed as a connecting element and the second thermally conducting element 27 is formed as a fixing element.
  • the connecting element and the fixing element thus by means of the thermally conducting device 24, the camera 7 can additionally be retained on the antenna housing 6.
  • the thermally conducting device 24 forms a retaining device for the camera 7 in and/or on the antenna housing 6 at the same time.
  • the second thermally conducting element 27 is formed as a screw 28, which can for example also be formed of aluminum.
  • the first thermally conducting element 26 is for example formed as an angular connector, which is connected to the screw 28.
  • the screw 28 is screwed to the support 23 and therefore fixes the camera housing 15 to the support 23. Therein, the screw 28 passes through the support 23 and protrudes on a bottom side 30 of the support 23 facing the exterior trim part 4.
  • a protruding area 29 of the screw can for example be in contact with the exterior trim part 4 and thereby dissipate the heat produced by the camera 7 via the exterior trim part 4 to the chassis 25.
  • Fig. 4 shows the antenna module 3 with the antenna housing 6 and the camera 7, wherein the at least one antenna 5, 5a, 5b is completely disposed in the interior of the antenna housing 6 not visible here and the camera 7 is disposed in the interior in certain areas.
  • a roof-shaped cover 31 of the antenna housing 6, which forms a radome for the at least one antenna 5 has a passage opening corresponding to the camera objective 10 in a rear wall 32 of a housing wall 33 of the antenna housing 6, in which the camera objective 10 is disposed at least in certain areas.
  • the camera objective 10 is disposed in the passage opening such that the housing wall 33 and the lens 1 1 of the camera 7 are in particular flush disposed.
  • the rear wall 32 and thereby the lens 1 1 of the camera 7 faces the environmental region 8 behind the motor vehicle 1 in an intended installation position of the antenna module 3 on the motor vehicle 1 .
  • the antenna housing 6 is formed in the shape of a shark fin.
  • curved sidewalls 34 of the cover 31 of the antenna housing 6 form a ridge 35 on a top side of the antenna module 3 starting from the vehicle frame 25.
  • the rear wall 32 of the cover 31 is also formed adjoining to the ridge 35 starting from the vehicle frame 25.

Abstract

The invention relates to an antenna module (3) for a motor vehicle (1) comprising at least one antenna (5, 5a, 5b) for an infotainment system of the motor vehicle (1), an antenna housing (6) for attaching to an exterior trim part (4) of the motor vehicle (1) and a camera (7) with a camera objective (10) for capturing an environmental region (8) of the motor vehicle (1), wherein the at least one antenna (5, 5a, 5b) is disposed in an interior of the antenna housing (6), wherein the camera (7) is disposed in the interior of the antenna housing (6) at least in certain areas and the antenna module (3) comprises at least one thermally conducting device (24), which is thermally coupled to the camera (7) and can be thermally coupled to a chassis (25) of the motor vehicle (1) for dissipating the heat produced by the camera (7) to the chassis (25) of the motor vehicle (19. The invention additionally relates to a driver assistance system (2) as well as to a motor vehicle (1).

Description

Antenna module for a motor vehicle, driver assistance system as well as motor vehicle
The invention relates to an antenna module for a motor vehicle comprising at least one antenna for an infotainment system of the motor vehicle, an antenna housing for attaching to an exterior trim part of the motor vehicle and a camera with a camera objective for capturing an environmental region of the motor vehicle, wherein the at least one antenna is disposed in an interior of the antenna housing. In addition, the invention relates to a driver assistance system with an antenna module as well as to a motor vehicle with a driver assistance system.
Camera-based driver assistance systems for motor vehicles, for example for monitoring an environmental region of the motor vehicle, are already known from the prior art.
Therein, cameras are attached to exterior trim parts of the motor vehicle for example to capture the environmental region of the motor vehicle in images. The images representing the environmental region, captured by the cameras can be provided to the driver assistance system of the motor vehicle. In order to particularly inexpensively configure such a driver assistance system, in DE 10 2010 064 080 A1 , it is disclosed to integrate the camera in a roof antenna of the motor vehicle. Such a roof antenna can for example be a shark fin antenna, in the antenna housing of which the camera and the antenna are integrated. Thus, additional installation locations for the camera, for example on bumpers of the motor vehicle, can be avoided.
In an interior of the antenna housing, the antenna and electronics for the antenna are also disposed besides the camera. Thus, the interior has a low installation space for the camera. Since the camera usually produces waste heat in the operation, it can occur that the camera overheats and is no longer functional.
It is the object of the present invention to provide a solution, how a highly integrated camera can particularly simply and well be protected from overheating.
According to the invention, this object is solved by an antenna module, a driver assistance system as well as a motor vehicle according to the independent claims. Advantageous embodiments of the invention are the subject matter of the dependent claims, of the description and of the figures. An antenna module according to the invention for a motor vehicle comprises at least one antenna for an infotainment system of the motor vehicle, an antenna housing for attaching to an exterior trim part of the motor vehicle and a camera with a camera objective for capturing an environmental region of the motor vehicle. The at least one antenna is disposed in an interior of the antenna housing. The camera is disposed in the interior of the antenna housing at least in certain areas. Moreover, the antenna module comprises at least one thermally conducting device, which is thermally coupled to the camera and can be thermally coupled to a chassis of the motor vehicle for dissipating the heat produced by the camera to the chassis of the motor vehicle.
By means of the at least one antenna of the antenna module, signals for the infotainment system of the motor vehicle can be emitted and/or received. The infotainment system can for example be a car radio and/or a navigation system and/or a driver assistance system, which for example performs assistance functions based on vehicle data emitted and/or received via car-to-car communication (Car2Car communication). Thereto, the antenna module can for example have a radio antenna and/or a GPS antenna and/or an antenna for the car-to-car communication as the at least one antenna. The at least one antenna is in particular completely disposed in the antenna housing, wherein the antenna housing forms a radome for the at least one antenna at least in certain areas. The antenna housing can for example be attached to a roof of the motor vehicle.
In addition, the camera with the camera objective is integrated in the antenna housing. Therein, the camera is disposed in the interior of the antenna housing at least in certain areas. The antenna housing can for example have a passage opening corresponding to the camera objective for the camera objective. Therein, the passage opening can be formed as a hole in the housing wall of the antenna housing, in which the camera objective is disposed at least in certain areas such that a lens disposed on the front side on the camera objective faces the environmental region. Thus, the camera can be disposed such that the camera objective is inserted into the passage opening from the interior of the antenna housing such that the camera can capture the environmental region of the motor vehicle. Electronics of the camera, for example an image sensor and electronic components for image processing, are in particular completely disposed in the interior of the antenna housing. Thus, viewed from the environmental region, only the camera objective, in particular only the lens of the camera objective, is visible.
Now, in order to protect the camera from overheating, waste heat, which the camera produces in the operation, is discharged or dissipated. Thereto, the antenna module has the at least one thermally conducting device. The thermally conducting device is thermally coupled to the camera and can be thermally coupled to the frame or chassis of the motor vehicle. The thermally conducting device is adapted to deliver or conduct the heat produced by the camera in the operation to the chassis or the frame of the motor vehicle. In particular, the at least one thermally conducting device can be thermally coupled to the exterior trim part, via which the waste heat is delivered to the chassis or the frame of the motor vehicle. Thereto, the thermally conducting device can for example be in contact with the exterior trim part in an intended installation position of the antenna module on the exterior trim part of the motor vehicle such that the heat is dissipated via the exterior trim part to the frame of the motor vehicle. Thus, it can be advantageously prevented that the camera overheats and a high functionality of the camera can be ensured. By dissipating the waste heat to the chassis, in addition, it can be prevented that an environment of the camera, thus, for example the interior of the antenna housing, heats up and thereupon for example the at least one antenna and/or electronics of the at least one antenna, which can also be disposed in the interior of the antenna housing, overheat.
Particularly preferably, the at least one thermally conducting device is adapted to retain the camera in the interior of the antenna housing. In other words, this means that the thermally conducting device does not only serve for dissipating the waste heat, but also for retaining the camera in the antenna housing. In particular, the camera is attached in and/or on the camera housing by means of the thermally conducting device. Thus, the thermally conducting device additionally forms a retaining device and therefore is configured in multifunctional manner.
Preferably, the at least one thermally conducting device comprises a first thermally conducting element thermally coupled to the camera and a separate second thermally conducting element thermally coupled to the first thermally conducting element, which can be coupled to the chassis for heat dissipation. Thus, the thermally conducting device is two-part formed. The at least one thermally conducting device can therefore be particularly flexibly disposed in the antenna housing such that the at least one thermally conducting device can be integrated in the antenna module in particularly good and space saving manner.
According to an advantageous configuration of the invention, the camera comprises a camera housing, wherein the first thermally conducting element is formed integrally with the camera housing. The camera housing is a separate housing different from the antenna housing, which is in particular completely disposed in the interior of the antenna housing. The camera housing can for example be a cast housing, which has the first thermally conducting element. For example, the camera housing can have a rear housing for electronics of the camera and a front housing for retaining the camera objective of the camera, wherein the camera housing is disposed in the interior of the antenna housing. In the rear housing, for example, a circuit board with an image sensor and with components for image processing can be disposed. In addition, the rear housing, which is for example prismatic formed, can have an interface for connecting to a control device of a driver assistance system on a rear side, via which the images captured by the camera can be provided to the control device. On the front side, the rear housing can be covered by the front housing. The front housing, which is also referred to as lens housing, can for example be plate-shaped formed and have a passage opening for the camera objective. The camera objective can for example be glued into the passage opening and thus be retained by the front housing. The first thermally conducting element can for example be disposed on a sidewall of the rear housing. The waste heat is therefore delivered to the second thermally conducting element via the camera housing and the first thermally conducting element integrally formed with the camera housing and dissipated to the chassis from the second thermally conducting element. For example, the first thermally conducting element is disposed on the camera housing such that it faces the exterior trim part at least in certain areas in an intended installation position of the antenna module on the exterior trim part of the motor vehicle. Thereby, the waste heat can be particularly fast dissipated to the chassis, in particular without heating up the interior of the antenna housing.
It proves advantageous if the camera housing and the first thermally conducting element are formed of aluminum. By the camera housing formed of aluminum, the electronics of the camera is surrounded by a shielding material. Thereby, antenna radiation of the at least one antenna can be shielded from the electronics of the camera. Thus, the camera can be disposed in the interior of the antenna housing near the at least one antenna, wherein the electronics of the camera is protected from disturbing influences by the antenna radiation. At the same time, aluminum has high thermal conductivity and thereby is particularly well suited for the first thermally conducting element in particular formed integrally with the antenna housing. The camera housing formed of aluminum thus serves for shielding as well as for heat dissipation. Thus, high functionality of the camera can be provided in particularly simple manner.
Preferably, the second thermally conducting element is formed as a mechanical fixing element, via which the camera is retained in the interior of the antenna housing and via which the camera can be thermally coupled to the chassis. The camera, in particular the camera housing, is fixed or retained in the interior of the antenna housing by means of the mechanical fixing element. In particular, the camera is mechanically connected to the antenna housing by means of the fixing element. The mechanical fixing element thus serves both for retaining the camera in the interior of the antenna housing and for dissipating the heat to the chassis. The mechanical fixing element, which is in particular formed of aluminum, is thermally coupled to the first thermally conducting element and thereby to the camera housing and can for example be in contact with the exterior trim part in an intended installation position of the antenna module on the motor vehicle such that the waste heat can be delivered to the exterior trim part. The second thermally conducting element formed as the fixing element can also serve for fixing the antenna housing to the exterior trim part. Thereby, the antenna housing is thermally coupled to the exterior trim part and the camera is thermally coupled to the exterior trim part at the same time. Thus, the antenna module is particularly simply configured since separate heat dissipating devices, for example cooling fins or thermally conducting pads, do not have to be provided, which have to be expensively integrated in the antenna housing.
Preferably, the first thermally conducting element is formed as a connecting element corresponding to the mechanical fixing element, wherein the connecting element and the fixing element are disposed engaging with each other for mechanical and thermal coupling. The first thermally conducting element and the second thermally conducting element are in particular connected in form-fit manner and thus form the retaining device in addition to the thermally conducting device.
In a configuration of the invention, the antenna module comprises a plate-shaped support for the at least one antenna and for electronics of the at least one antenna, wherein the camera is mechanically connected to the support via the mechanical fixing element. The plate-shaped support is in particular formed as a circuit board and thus constitutes a so- called antenna PCB (PCB- printed circuit board). By means of the second thermally conducting element in the form of the fixing element, thus, the camera is fixed to the plate- shaped support or to the antenna PCB. The antenna housing can for example have a roof-shaped cover, which forms a radome for the at least one antenna and which is connected to the plate-shaped support. A rear side of the plate-shaped support faces the exterior trim part in the intended installation position of the antenna module, wherein the plate-shaped support can be disposed on the exterior trim part by means of the fixing element. The at least one antenna, the electronics for the at least one antenna and the camera housing are disposed on a front side of the support opposing the rear side of the support and are therein covered by the roof-shaped cover.
Particularly preferably, the mechanical fixing element is formed as a screw. The second thermally conducting element in the form of the screw thus also serves for fixing the camera housing to the antenna housing, for example to the support. Thereto, the first thermally conducting element can for example be formed as an angular connector, wherein one leg of the angular connector is disposed on the camera housing and a second leg of the angular connector for example rests on the front side of the plate- shaped support. The second leg can have a hole for forming the engagement with the screw. In addition, the plate-shaped support can have a hole for the screw, through which the screw engaging with the angular connector is inserted and thereby the camera housing is fixed to the support. Therein, the screw, in particular a screw boss, can be passed through the support and protrude beyond the rear side on the rear side facing the exterior trim part. The screw can be thermally coupled to the frame of the motor vehicle for example by the screw protruding beyond the rear side of the support being in contact with the exterior trim part and/or the frame.
Preferably, the antenna module is formed as a shark fin antenna module. A rear wall of the antenna housing can for example have the passage opening for the camera objective. This rear wall faces a rearward environmental region of the motor vehicle in an intended installation position of the antenna module such that the camera can capture the rearward environmental region.
In addition, the invention relates to a driver assistance system with an antenna module according to the invention. The images captured by the camera can be provided to the driver assistance system. The driver assistance system can for example be formed as a reversing assistant. However, it can also be provided that the driver assistance system allows so-called mirror-less driving. Thereto, the environmental region, in particular the rearward environmental region located behind the motor vehicle, is captured in images. The images are displayed on a display device of the driver assistance system, which is in particular disposed in a passenger cabin of the motor vehicle such that a driver of the motor vehicle can capture the rearward environmental region by looking at the display device.
A motor vehicle according to the invention includes a driver assistance system according to the invention. The motor vehicle is in particular formed as a passenger car. Preferably, the motor vehicle is formed without rearview mirrors. This means that rearview mirrors of the motor vehicle, for example exterior mirrors and interior mirrors of the motor vehicle, are replaced by the antenna module with the camera. The antenna module, which is preferably disposed on a roof of the motor vehicle, is therein in particular oriented such that the camera can capture the rearward environmental region in images. The images of the rearward environmental region captured by the camera are presented on the display device for the driver, as already described.
The preferred embodiments presented with respect to the antenna module according to the invention and the advantages thereof correspondingly apply to the driver assistance system according to the invention as well as to the motor vehicle according to the invention.
With indications of "behind", "rearward", "lateral", "interior", "front-side", "rear-side", "top side", "rear side" etc., the positions and orientations with intended use and intended arrangement of the antenna module on the motor vehicle and with an observer then standing in front of the motor vehicle and looking in the direction of the motor vehicle are specified.
Further features of the invention are apparent from the claims, the figures and the description of figures. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of figures and/or shown in the figures alone are usable not only in the respectively specified combination, but also in other combinations or alone without departing from the scope of the invention. Thus, implementations are also to be considered as encompassed and disclosed by the invention, which are not explicitly shown in the figures and explained, but arise from and can be generated by separated feature combinations from the explained implementations. Implementations and feature combinations are also to be considered as disclosed, which thus do not have all of the features of an originally formulated independent claim. Moreover, implementations and feature combinations are also to be considered as disclosed, in particular by the explanations set out above, which extend beyond or deviate from the feature combinations set out in the relations of the claims.
Now, the invention is explained in more detail based on preferred embodiments as well as with reference to the attached drawings. There show:
Fig. 1 a schematic illustration of an embodiment of a motor vehicle according to the invention;
Fig. 2 a schematic illustration of a camera of an antenna module according to the invention in an exploded representation;
Fig. 3 a schematic illustration of an embodiment of the antenna module according to the invention; and
Fig. 4 a schematic illustration of the antenna module according to Fig. 3.
In the figures, identical as well as functionally identical elements are provided with the same reference characters.
Fig. 1 shows a motor vehicle 1 according to the present invention. The motor vehicle 1 is in particular formed as a passenger car. The motor vehicle 1 includes a driver assistance system 2. The driver assistance system 2 includes an antenna module 3, which is disposed on an exterior trim part 4 of the motor vehicle 1 . Here, the antenna module 3 is disposed on a roof of the motor vehicle 1 . The antenna module 3 includes at least one antenna 5, which emits and/or receives signals for an infotainment system of the motor vehicle 1 . The infotainment system of the motor vehicle 1 can for example be a car radio, a navigation system or the like.
In addition, the antenna module 3 has an antenna housing 6, which is attached to the exterior trim part 4 for disposing the antenna module 3 on the exterior trim part 4. Here, the antenna housing 6 is formed in the shape of a shark fin. Thus, the antenna module 3 is in particular formed as a shark fin antenna module. The at least one antenna 5 is disposed in an interior of the antenna housing 6. Moreover, the antenna module 3 has a camera 7, which is disposed in the interior of the antenna housing 6 at least in certain areas. The camera 7 is adapted to capture an environmental region 8 of the motor vehicle 1 in images. In particular, the camera 7 captures a rearward environmental region 8 or an environmental region 8 behind the motor vehicle 1 . The images captured by the camera 7 can be provided to a control device 9 of the driver assistance system 2. The control device 9 can for example be formed by a vehicle-side controller. The images captured by the camera 7 can for example be displayed on a display device of the driver assistance system 2 not illustrated here in a passenger cabin of the motor vehicle 1 . Thus, rearview mirrors of the motor vehicle 1 can be replaced by the driver assistance system 2 and so- called mirror-less driving can be allowed. Thus, the motor vehicle 1 is in particular formed without rearview mirrors.
Fig. 2 shows the camera 7 of the antenna module 3 in an exploded representation. The camera 7 includes a camera objective 10 with a camera lens 1 1 and with an objective tube 12. The objective tube 12 is in particular cylindrically formed, wherein the lens 1 1 is disposed on the front side on the objective tube 12. In addition, the objective 10 has a retaining element 13 as well as a cap element 14. In addition, the camera 7 includes a camera housing 15, which has a rear housing 16 as well as a front housing 17. The rear housing 16 is in particular prismatic formed and covered on the front side by the front housing 17, which is in particular plate-shaped formed. In the rear housing 16, electronics here illustrated as a circuit board 18 can be disposed. The circuit board 18 can be attached to the front housing 17 by means of fixing elements 19, for example screws. The circuit board 18 can for example have an image sensor and components for image processing of the images captured by the image sensor of the camera 7. The front housing 17 is also referred to as lens housing and serves for retaining the camera objective 10. Thereto, the front housing 17 has a passage opening 20, in which the camera objective 10 can be disposed in certain areas. In particular, the retaining element 13 is disposed in the passage opening 20 such that the cap element 14 rests on a border 21 of the passage opening 20. The cap element 14 can be attached to the border 21 of the passage opening 20 by means of an adhesive 22 such that the objective 10 is retained on the front housing 17 and thereby on the camera housing 15.
Fig. 3 shows a section of an embodiment of the antenna module 3 according to the invention. Here, the antenna module 3 has a GPS antenna 5a as well as a car-to-car communication antenna 5b as the at least one antenna 5. The antennas 5a, 5b are disposed in the interior of the antenna housing 6. In addition, the antenna module 3 has a plate-shaped support 23, to which the antennas 5a, 5b are attached. The plate-shaped support 23 is in particular a circuit board and forms a so-called antenna PCB. Moreover, the antenna module 3 has at least one thermally conducting device 24, which is adapted to conduct or dissipate the heat produced by the camera 7 in the operation to a chassis 25 of the motor vehicle 1 . Thereto, the thermally conducting device 24 is thermally coupled to the camera 7 and for example can be thermally coupled to the exterior trim part 4. Thereby, the waste heat of the camera 7 can be dissipated to the chassis 25 or the frame of the motor vehicle 1 via the exterior trim part 4.
Here, the thermally conducting device 24 is two-part formed. The thermally conducting device 24 has a first thermally conducting element 26, which is here formed integrally with the camera housing 15. The camera housing 15 can for example be a cast housing. The first thermally conducting element 26 and the camera housing 15 are in particular formed of aluminum. The electronics 18 of the camera 7 is therefore surrounded by a shielding material in the form of aluminum. Thereby, the radiation of the antennas 5a, 5b can be shielded from the electronics 18 of the camera 7. By the integral formation of the camera housing 15 and the first thermally conducting element 26, the thermally conducting element 26 is thermally coupled to the camera 7.
In addition, the thermally conducting device 24 has a second thermally conducting element 27, which is thermally coupled to the first thermally conducting element 26 and can be coupled to the chassis 25. Here, the second thermally conducting element 27 is additionally mechanically coupled to the first thermally conducting element 26 by the first thermally conducting element 26 and the second thermally conducting element 27 engaging with each other. The first thermally conducting element 26 is therefore formed as a connecting element and the second thermally conducting element 27 is formed as a fixing element. By means of the connecting element and the fixing element, thus by means of the thermally conducting device 24, the camera 7 can additionally be retained on the antenna housing 6. Thus, the thermally conducting device 24 forms a retaining device for the camera 7 in and/or on the antenna housing 6 at the same time.
Here, the second thermally conducting element 27 is formed as a screw 28, which can for example also be formed of aluminum. The first thermally conducting element 26 is for example formed as an angular connector, which is connected to the screw 28. Here, the screw 28 is screwed to the support 23 and therefore fixes the camera housing 15 to the support 23. Therein, the screw 28 passes through the support 23 and protrudes on a bottom side 30 of the support 23 facing the exterior trim part 4. A protruding area 29 of the screw can for example be in contact with the exterior trim part 4 and thereby dissipate the heat produced by the camera 7 via the exterior trim part 4 to the chassis 25.
Fig. 4 shows the antenna module 3 with the antenna housing 6 and the camera 7, wherein the at least one antenna 5, 5a, 5b is completely disposed in the interior of the antenna housing 6 not visible here and the camera 7 is disposed in the interior in certain areas. In particular, a roof-shaped cover 31 of the antenna housing 6, which forms a radome for the at least one antenna 5, has a passage opening corresponding to the camera objective 10 in a rear wall 32 of a housing wall 33 of the antenna housing 6, in which the camera objective 10 is disposed at least in certain areas. Therein, the camera objective 10 is disposed in the passage opening such that the housing wall 33 and the lens 1 1 of the camera 7 are in particular flush disposed. Thus, only the lens 1 1 of the camera 7 is visible viewed from the outside. Therein, the rear wall 32 and thereby the lens 1 1 of the camera 7 faces the environmental region 8 behind the motor vehicle 1 in an intended installation position of the antenna module 3 on the motor vehicle 1 .
In addition, it is shown that the antenna housing 6 is formed in the shape of a shark fin. Therein, curved sidewalls 34 of the cover 31 of the antenna housing 6 form a ridge 35 on a top side of the antenna module 3 starting from the vehicle frame 25. The rear wall 32 of the cover 31 is also formed adjoining to the ridge 35 starting from the vehicle frame 25.

Claims

Claims
1 . Antenna module (3) for a motor vehicle (1 ) comprising at least one antenna (5, 5a, 5b) for an infotainment system of the motor vehicle (1 ), an antenna housing (6) for attaching to an exterior trim part (4) of the motor vehicle (1 ) and a camera (7) with a camera objective (10) for capturing an environmental region (8) of the motor vehicle (1 ), wherein the at least one antenna (5, 5a, 5b) is disposed in an interior of the antenna housing (6),
characterized in that
the camera (7) is disposed in the interior of the antenna housing (6) at least in certain areas and the antenna module (3) comprises at least one thermally conducting device (24), which is thermally coupled to the camera (7) and can be thermally coupled to a chassis (25) of the motor vehicle (1 ) for dissipating the heat produced by the camera (7) to the chassis (25) of the motor vehicle (1 ).
2. Antenna module (3) according to claim 1 ,
characterized in that
the at least one thermally conducting device (24) is adapted to retain the camera (7) in the interior of the antenna housing (6).
3. Antenna module (3) according to claim 1 or 2,
characterized in that
the at least one thermally conducting device (24) comprises a first thermally conducting element (26) thermally coupled to the camera (7) and a separate second thermally conducting element (27) thermally coupled to the first thermally conducting element (26), which can be coupled to the chassis (25) for heat dissipation.
4. Antenna module (3) according to claim 2,
characterized in that
the camera (7) comprises a camera housing (15), wherein the first thermally conducting element (26) is formed integrally with the camera housing (15).
5. Antenna module (3) according to claim 4,
characterized in that the camera housing (15) and the first thermally conducting element (26) are formed of aluminum.
6. Antenna module (3) according to any one of claims 3 to 5,
characterized in that
the second thermally conducting element (27) is formed as a mechanical fixing element, via which the camera (7) is retained in the interior of the antenna housing (6) and via which the camera (7) can be thermally coupled to the chassis (25).
7. Antenna module (3) according to claim 6,
characterized in that
the first thermally conducting element (26) is formed as a connecting element corresponding to the mechanical fixing element, wherein the connecting element and the fixing element are disposed engaging with each other for mechanical and thermal coupling.
8. Antenna module (3) according to claim 6 or 7,
characterized in that
the antenna module (3) comprises a plate-shaped support (23) for the at least one antenna (5, 5a, 5b) and for electronics of the at least one antenna (5, 5a, 5b), wherein the camera (5) is mechanically connected to the support (23) by means of the mechanical fixing element.
9. Antenna module (3) according to any one of claims 6 to 8,
characterized in that
the mechanical fixing element is formed as a screw (28).
10. Antenna module (3) according to any one of the preceding claims,
characterized in that
the antenna module (3) is formed as a shark fin antenna.
1 1 . Driver assistance system (2) for a motor vehicle (1 ) with an antenna module (3) according to any one of the preceding claims.
12. Motor vehicle (1 ) with a driver assistance system (2) according to claim 1 1 .
13. Motor vehicle (1 ) according to claim 12,
characterized in that
the motor vehicle (1 ) is formed without rearview mirrors.
14. Motor vehicle (1 ) according to claim 12 or 13,
characterized in that
the antenna module (3) is disposed on a roof of the motor vehicle (1 ).
PCT/EP2017/051057 2016-01-21 2017-01-19 Antenna module for a motor vehicle, driver assistance system as well as motor vehicle WO2017125477A1 (en)

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