EP3918366A1 - Cooling device for an object detection sensor - Google Patents
Cooling device for an object detection sensorInfo
- Publication number
- EP3918366A1 EP3918366A1 EP20702280.7A EP20702280A EP3918366A1 EP 3918366 A1 EP3918366 A1 EP 3918366A1 EP 20702280 A EP20702280 A EP 20702280A EP 3918366 A1 EP3918366 A1 EP 3918366A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- heat transmission
- sensor
- cooling device
- object detection
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
- G01S7/4813—Housing arrangements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0204—Mounting supporting structures on the outside of casings
Definitions
- the invention relates to a cooling device for an object detection sensor.
- Object detection sensors such as radar and lidar systems or cameras, are increasingly being used on motor vehicles to examine the surroundings of the vehicle for objects. A relative position and a relative speed in relation to the object detection sensor and thus also to the motor vehicle are usually determined. Such object detection sensors generate a significant amount of thermal energy during operation that has to be dissipated.
- An object detection sensor can be formed, for example, by a radar system, a lidar system or a camera system.
- Radar and lidar systems include a transmission element which emits electromagnetic radiation, and at least one detection element which detects the radiation previously emitted and reflected on an object. By evaluating the measurement data determined by the detection element, a relative position of objects and mostly also a relative speed in relation to the object detection sensor is determined.
- Camera systems mostly comprise only one detection element, which determines the radiation arriving from the environment in order to display a camera image. If necessary, a camera system can also include a transmission element, such as an infrared lamp.
- a transmission element such as an infrared lamp.
- object detection sensors are used on motor vehicles to provide driver assistance functions, semi-autonomous driving functions or fully autonomous driving functions.
- the area of application is not limited exclusively to motor vehicles, but can also be used on all other types of vehicles. Stationary use is also possible.
- the cooling device is designed in particular for such an object recognition sensor.
- the cooling device comprises a sensor-side heat transmission element and a sensor-remote heat absorption element.
- the sensor-side heat transmission element and the sensor-distant heat absorption element are arranged opposite one another.
- a heat transmission surface of the sensor-side heat transmission element and a heat absorption surface of the sensor-distant heat absorption element are formed by a space from one another.
- the sensor-side heat transmission element is in contact with the heat-generating object detection sensor or is formed thereon.
- the heat generated by electronic components of the object detection sensor such as a transmission element in the form of a transmission chip and / or a reception element in the form of a reception chip, is transmitted to the heat transmission element.
- the heat transmission element heats up accordingly and transfers the thermal energy introduced, in particular by radiant heat, via the intermediate space to the heat absorption element remote from the sensor.
- the heat absorption element remote from the sensor absorbs this heat radiation and dissipates it to an environment.
- the object detection sensor can be designed to be rotatable or at least pivotable within a certain angular range, and nevertheless an effective removal of the generated heat is provided.
- the heat transmission surface is expediently firmly connected to the object detection sensor, in particular to a sensor housing of the object detection sensor. and carries out a common movement with it.
- the heat absorption element is expediently firmly connected to an environmental element relative to which the object detection sensor and also the heat transmission element can move relative to one another.
- this surrounding element is formed by a module housing, which encloses the object detection sensor and also the cooling device.
- a free pivoting movement can be provided compared to a cooling device that makes a mechanical contact between the heat transmission element and the heat absorption element. This is made possible because the heat transmission surface and the heat absorption surface do not come into contact with the system and thereby a free relative movement, in particular friction-free relative movement, is made possible.
- the heat transmission element is particularly advantageously formed by a sensor housing of the object detection sensor or connected to a sensor housing of the object detection sensor.
- the sensor housing is a housing of the object detection sensor, which encloses or encompasses the components of the object detection sensor.
- the sensor housing comprises a transmitting element, a receiving element and / or a circuit board with electronics.
- the sensor housing is advantageously made of aluminum.
- the sensor housing can also have a transmission optics and / or a reception optics.
- the sensor housing forms the heat transmission element.
- the heat transmission element is thus part of the sensor housing, the sensor housing accordingly providing the heat transmission surface.
- the heat transmission element can come into direct contact with at least some of the heat-generating components optimal removal of the thermal energy is made possible.
- the heat transmission element closes off the sensor housing.
- the heat transmission element is firmly connected to the housing. Accordingly, this is brought to an already completed sensor housing.
- the attachment can take place, for example, via a screw connection.
- the heat absorption element is formed by a holding element or connected to a holding element.
- the holding element can be designed, for example, as a holder for the object detection sensor, wherein the object detection sensor can move, in particular rotate or pivot, relative to the holding element.
- the Hal teelement has to provide such a relative movement corresponding holding means, such as one or more bearing elements.
- the Hal teelement itself is arranged for example on a housing of another assembly, in particular on another assembly of a motor vehicle.
- the holding element is attached to a module housing of the object detection sensor or is formed in one piece by the module housing.
- the corresponding module housing or the housing of the module provides one or more structures which provide such a holding function for the object detection sensor.
- the heat absorption element can thus be formed by the holding element itself or it is formed by a separate element which is preferably fixedly connected to the holding element. Accordingly, the holding element provides the heat absorption surface or the heat absorption element attached to the holding element provides the heat absorption surface.
- the module housing preferably encloses the object detection sensor and the cooling device.
- the module housing is sealed liquid and gas tight with particular advantage.
- the cooling device is advantageously designed to provide a relative movement between the heat transmission element and the heat absorption element.
- Such a relative movement goes hand in hand with a relative movement which the object detection sensor executes.
- the heat transmission element which is attached to or formed by the object detection sensor, performs a common movement with the object detection sensor.
- a relative movement is a pivoting movement. This can provide a swivel range of a few degrees, for example swivel angles between 5 ° and 20 ° are possible.
- Such a pivoting process enables the object detection sensor to cover a larger angular range. This can change, for example, a direction of view of the object detection sensor.
- the heat transmission element and the heat absorption element are spaced apart from one another at each relative position, so that there is no contact between them.
- the heat transmission element and / or the heat absorption element have ribs.
- Such ribs enlarge the heat transmission surfaces and also a heat absorption surface compared to a flat surface. Depending on the design of the rip pen, the surface can increase many times over.
- the ribs are formed in one piece before preferably by the heat transmission element and / or the heat absorption element. In a further embodiment variant, the ribs of the heat transmission element and the ribs of the opposite heat absorption element engage in one another.
- the intervention can be comb-like, for example.
- the ribs also advantageously overlap in a direction R, which extends from the heat absorption element to the heat transmission element.
- a rib of the heat transmission element overlaps in the direction R with a rib of the opposite heat absorption element.
- several of the ribs of the respective elements also overlap in the direction R.
- the intermeshing ribs provide heat transmission sub-surfaces and heat absorption sub-surfaces, with a heat transmission sub-surface and a heat absorption sub-surface being opposite one another and enabling optimized heat exchange. On the one hand, this provides large areas and, on the other hand, allows small distances between the areas.
- a surface normal of such a heat transmission lower surface and also a heat absorption lower surface are formed with particular advantage perpendicular to the direction R and also perpendicular to a pivoting direction.
- the ribs can engage with one another essentially in the manner of a comb, free pivoting being made possible over a large angular range.
- a space is formed between two adjacent ribs of the transmission element or the heat absorption element, into which a rib of the opposite heat absorption element or heat transmission element engages. In particular, this provides a large coverage of the heat transmission area and the heat absorption area.
- the heat transmission element and / or the heat absorption element are advantageously formed from a metal, in particular from aluminum.
- the intermediate space is filled with a thermally conductive fluid.
- a space that is formed between the ribs is filled with such a fluid with particular advantage.
- a fluid can be gaseous or liquid. Air, fat or oil are particularly suitable. Fluids with high thermal conductivity and low viscosity are preferred.
- gases in addition to the heat of transferring the thermal energy through thermal radiation, a portion is also transferred via convection.
- a portion is also transferred via convection.
- the heat energy is transmitted primarily via the heat conduction of the liquid.
- the intermediate space can be closed off from the outside via a separating element. The liquid is kept within the intermediate space by the separating element.
- the heat transmission element is in contact with a circuit board and / or a chip of the detection sensor.
- the heat transmission element is part of the sensor housing or closes the sensor housing. This enables a direct contact to be made between the heat transmission element and the heat-generating components.
- a heat-conducting paste is arranged between them, which enables fast and effective heat transfer. This enables a particularly effective dissipation of the generated thermal energy.
- the heat transmission surface advantageously has a surface optimized for emission and / or the sensor-remote heat transmission surface has a surface optimized for absorption.
- the surfaces of the two elements can be identical or different.
- Such emission-optimized and absorption-optimized surfaces can be provided, for example, by coatings, varnishes or surface treatments.
- the distance between the heat transmission element and the heat absorption element or the heat transmission surface and the heat transmission surface is less than or equal to 2 millimeters, 1 millimeter or 0.5 millimeter.
- the effectiveness of the heat transfer is increased by a distance of a few millimeters. This distance is preferably formed over surface areas, in particular on the interlocking ribs.
- the heat-conducting fluid is a gas and that the cooling device has a fan for circulating the fluid.
- Such a fan can increase heat transfer, which is provided by convention.
- the initially formulated object is also achieved by an object detection sensor, which is a cooling device according to one of claims 1 to 11 or according to a cooling device according to at least one of the previously explained embodiments.
- an object detection sensor which is a cooling device according to one of claims 1 to 11 or according to a cooling device according to at least one of the previously explained embodiments.
- the previous and further explanations relate to such an object recognition sensor.
- Figure 1 is a perspective view of an object detection sensor with a cooling device.
- Fig. 2 is a representation of the object detection sensor with a cooling device
- FIG. 3 shows a folded element of the object detection sensor with cooling device from FIG. 1 in a perspective partial illustration
- Fig. 4 shows the folding element of Figure 3 in a front view.
- an object detection sensor 10 with a cooling device 12 is Darge.
- the object detection sensor 10 comprises a multi-part housing 14 with the sensor components and a folding element 16 on which the multi-part housing 14 is arranged.
- the object detection sensor 10 is in this case formed as a LIDAR system, which has a transmitting element 18 in the form of a transmitting chip, a receiving element 20 in the form of a receiving chip and a flank circuit board with further electronic components. Flaupplatine 22.
- the object detection sensor 10 has a transmitting optics 24 and a receiving optics 26, each having an optical housing for arranging several optical elements. Transmitting optics 24 and receiving optics are shown only schematically in FIG. 2 and without further details.
- the LIDAR system is particularly advantageously designed in accordance with the LIDAR system published in patent specification WO 2017/081294 A1.
- the multi-part housing 14 of the object detection sensor 10 is arranged via Lagerele elements 28 with respect to the folding element 16 as a gift. By pivoting, for example, a field of view of the object detection sensor 10 can be aligned with a horizon in order to optimally adapt the field of vision to the environment.
- the electronic components in particular the transmitting element 18 and the receiving element 20, generate thermal energy. This thermal energy is dissipated by the object detection sensor via the cooling device 12.
- the cooling device 12 comprises a heat transmission element 30 which is formed on the sensor side and a heat absorption element 32 which is formed remote from the sensor.
- the heat transmission element 30 is formed by a metal plate, in particular in the form of an aluminum plate, and attached to the object detection sensor.
- the heat transmission element 30 is in this case fastened by means of a screw connection to the multi-part housing and forms part of the sensor housing.
- the screw connection is carried out by a screw which engages in an opening 34 with a thread.
- the heat absorption element is formed by the holding element 16.
- the holding element has reinforcing structures 36. Openings 38 are introduced into the reinforcement structures 36 from the side of the holding element 16 opposite the object detection sensor. These openings 36, in particular bores, form a thread so that the object detection sensor can be attached.
- the heat transmission element 30 has a heat transmission surface 40 which faces the heat absorption element 32.
- the heat absorption element 32 in turn has a heat absorption surface 42 which faces the heat transmission element.
- the heat transmission surface 40 and the heat absorption surface 42 lie opposite one another.
- the cooling device 12 provides cooling by transferring the heat energy generated by the electronics to the heat transmission element 30.
- the heat energy absorbed by the heat transmission element 30 of the electronic components is transferred via its heat transmission surface 40 via heat radiation to the heat absorption surface 42 and absorbed by the heat absorption element 32. That from the heat absorbing member 32 absorbed thermal energy is then released into the environment. In addition to the transfer of thermal energy through thermal radiation, the thermal energy is also partially transferred by convention.
- the heat absorption element 32 in the form of the holding element 16 is firmly connected to a housing, in particular a module housing of the object detection sensor and the cooling device.
- the holding element 16 can also be formed in one piece by the module housing.
- Such a module housing around the object detection sensor and the cooling device conveniently fully and fluid-tight.
- the transfer of the thermal energy from the heat transmission element 30 to the heat absorption element 32 takes place without contact via an intermediate space 43.
- the intermediate space 43 is formed between the heat transmission element 30 and the heat absorbing element 32.
- the object detection sensor is designed such that the heat transmission element 32 and the heat absorption element 32 do not come into contact with the system. This enables a smooth and simple pivoting of the object detection sensor relative to the holder.
- the space 43 provides a distance between the heat transmission element and the heat absorption element.
- a liquid such as an oil or a fat, can also be arranged within the intermediate space 43 instead of a gas.
- the heat transfer then takes place through the thermal conductivity of the liquid.
- a plurality of ribs which protrude in the direction of the opposite element, are each formed on the heat transmission element 30 and the heat absorption element 32.
- the ribs 44 of the heat transmission element are designed as semicircular disks which extend in a direction R towards the heat absorption element 32.
- the direction R extends from the heat absorption element in the direction of the heat transmission element 32. In particular, this is perpendicular to the associated surface part, as shown in FIG. 2.
- the heat absorption element also has ribs 46, which also pass through semicircular discs are executed and extend to the heat transmission element 30 out.
- each rib 44 of the heat transmission element 30 has two heat transmission sub-surfaces 48 and each rib 46 of the heat absorption element 32 has two heat absorption sub-surfaces 50.
- the ribs 44 and 46 are arranged on the heat transmission element 30 and the heat absorption element 32 opposite and offset, so that they engage with each other. Accordingly, a rib of the other element is arranged between two ribs of one element.
- the space 43 in the illustration according to FIG. 2 extends essentially in a meandering manner through the ribs. Accordingly, the ribs 44 and 46 alternately engage one another, in particular comb-shaped.
- a heat transmission lower surface 48 is usually associated with a heat absorption lower surface 50 of the adjacent rib. Between two ribs of an element, a free space 52 is formed, which is part of the intermediate space 43. In particular, a rib of one element engages in a free space 52 of the other element.
- the disk-shaped ribs are aligned in such a way that pivoting of the multi-part housing 14 and thus the sensor system relative to the folding element 16 is made possible.
- the opposing ribs do not come into contact with one another in any pivot position.
- the ribs are in a ner direction of extension, which is perpendicular to the direction R and perpendicular to a pivoting direction of the multi-part housing 14.
- Such a distance D can be, for example, 0.5 millimeter, 1 millimeter or even two millimeters. In particular, distances in the range of 0.5 millimeters to 2 millimeters are possible. Due to the small distance selected, the transmission by heat radiation is particularly effective.
- the ribs 46 and 44 are also designed such that they overlap in the radial direction at least partially or to a large extent, that is to say at least more than 50%, in the R direction.
- a heat transfer surface 48 and a heat absorption surface 50 can overlap over a part of the surface or a large part of the surface, that is to say at least 50% of the surface.
- the heat transmission element 30 and the heat transmission element 32 in particular the heat transmission surface 40 and the heat absorption surface 42, can be provided with an emission-optimized or absorption-optimized surface.
- This can be, for example, a coating, a varnish, or a specific creation of the surface.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Materials Engineering (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Studio Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019201031.8A DE102019201031A1 (en) | 2019-01-28 | 2019-01-28 | Cooling device for an object detection sensor |
PCT/EP2020/051926 WO2020157005A1 (en) | 2019-01-28 | 2020-01-27 | Cooling device for an object detection sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3918366A1 true EP3918366A1 (en) | 2021-12-08 |
Family
ID=69326533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20702280.7A Pending EP3918366A1 (en) | 2019-01-28 | 2020-01-27 | Cooling device for an object detection sensor |
Country Status (7)
Country | Link |
---|---|
US (1) | US20220151105A1 (en) |
EP (1) | EP3918366A1 (en) |
JP (1) | JP7432947B2 (en) |
KR (1) | KR102637236B1 (en) |
CN (1) | CN113348376B (en) |
DE (1) | DE102019201031A1 (en) |
WO (1) | WO2020157005A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022210550A1 (en) | 2022-10-06 | 2024-04-11 | Vitesco Technologies GmbH | Housing for a power electronics component |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3844341A (en) * | 1972-05-22 | 1974-10-29 | Us Navy | Rotatable finned heat transfer device |
JP2004092931A (en) | 2002-08-29 | 2004-03-25 | Aisan Ind Co Ltd | Heat exchanger |
DE102011052738A1 (en) * | 2011-08-16 | 2013-02-21 | Leica Microsystems Cms Gmbh | detecting device |
US20160178289A1 (en) | 2013-08-21 | 2016-06-23 | CoolChip Technologies, Inc. | Kinetic heat-sink with interdigitated heat-transfer fins |
US9343851B2 (en) * | 2014-08-29 | 2016-05-17 | Tyco Electronics Corporation | Pluggable connector configured to transfer thermal energy away from internal electronics of the pluggable connector |
EP3168641B1 (en) | 2015-11-11 | 2020-06-03 | Ibeo Automotive Systems GmbH | Method and device for optically measuring distances |
US10232798B2 (en) | 2016-01-29 | 2019-03-19 | Veoneer Us, Inc. | Apparatuses for mounting camera arrangements on motor vehicles |
JP6654747B2 (en) | 2016-09-23 | 2020-02-26 | パナソニックi−PROセンシングソリューションズ株式会社 | Surveillance camera |
US10749308B2 (en) * | 2016-10-17 | 2020-08-18 | Waymo Llc | Thermal rotary link |
US11486968B2 (en) * | 2017-11-15 | 2022-11-01 | Magna Electronics Inc. | Vehicle Lidar sensing system with sensor module |
US11500068B2 (en) * | 2018-01-09 | 2022-11-15 | Lg Electronics Inc. | Lidar apparatus for vehicle |
US10845465B2 (en) * | 2018-03-12 | 2020-11-24 | Ford Global Technologies, Llc | Vehicle object-detection sensor assembly |
US11638362B2 (en) * | 2018-10-29 | 2023-04-25 | Magna Electronics Inc. | Vehicular radar sensor with enhanced housing and PCB construction |
-
2019
- 2019-01-28 DE DE102019201031.8A patent/DE102019201031A1/en active Pending
-
2020
- 2020-01-27 US US17/426,006 patent/US20220151105A1/en not_active Abandoned
- 2020-01-27 CN CN202080010842.9A patent/CN113348376B/en active Active
- 2020-01-27 JP JP2021543357A patent/JP7432947B2/en active Active
- 2020-01-27 WO PCT/EP2020/051926 patent/WO2020157005A1/en unknown
- 2020-01-27 EP EP20702280.7A patent/EP3918366A1/en active Pending
- 2020-01-27 KR KR1020217024211A patent/KR102637236B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
WO2020157005A1 (en) | 2020-08-06 |
KR102637236B1 (en) | 2024-02-15 |
US20220151105A1 (en) | 2022-05-12 |
KR20210105426A (en) | 2021-08-26 |
CN113348376A (en) | 2021-09-03 |
CN113348376B (en) | 2024-05-10 |
JP7432947B2 (en) | 2024-02-19 |
JP2022518558A (en) | 2022-03-15 |
DE102019201031A1 (en) | 2020-07-30 |
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