WO2012163342A1 - Device with an optical sensor system and anti-misting solution - Google Patents
Device with an optical sensor system and anti-misting solution Download PDFInfo
- Publication number
- WO2012163342A1 WO2012163342A1 PCT/DE2012/100123 DE2012100123W WO2012163342A1 WO 2012163342 A1 WO2012163342 A1 WO 2012163342A1 DE 2012100123 W DE2012100123 W DE 2012100123W WO 2012163342 A1 WO2012163342 A1 WO 2012163342A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light source
- vehicle window
- active light
- optical sensor
- sensor system
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/023—Cleaning windscreens, windows or optical devices including defroster or demisting means
- B60S1/026—Cleaning windscreens, windows or optical devices including defroster or demisting means using electrical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
- B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
- B60S1/0822—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like characterized by the arrangement or type of detection means
- B60S1/0833—Optical rain sensor
- B60S1/0844—Optical rain sensor including a camera
- B60S1/0848—Cleaning devices for cameras on vehicle
-
- 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
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
Definitions
- the invention relates to a device for a vehicle, which comprises a housing and at least one optical sensor system and is arranged in the interior of a vehicle behind a vehicle window, with a view towards and / or through the vehicle window.
- optical sensor systems for example for detecting the vehicle environment, e.g. Camera systems or lidar sensors (light detection and ranging).
- a majority of these sensor systems looks in the direction of travel through a vehicle window, in particular through the windshield of the vehicle, and undertakes various driver-assisting functions by means of special electronic devices and software.
- Driver assistance functions For example, the use of cameras for driver assistance systems is known. Due to the exposed mounting position of the camera systems, usually directly behind the windshield of the vehicle, with a more or less complete volume of air, for example in the form of a hermetically sealed reformtrichters between camera optics and windshield, it comes under certain environmental conditions to fog the disc, especially on the disc inside. Such a disc fitting leads to the fact that functions assigned to the camera system as well as other optical sensor systems can not be temporarily realized since no evaluable image can be delivered or because malfunctioning of assistance functions could occur, for example to a false triggering of automatic windscreen wipers. By integrating ever more important and sensitive functions, such as automatic lighting control or Pedestrian protection, are times when optical sensor systems are unavailable and the likelihood of malfunctioning, by customers and legislators, is becoming less tolerated.
- optical sensor systems are already known from the prior art, which have a device for freeing vehicle windows in the viewing area from fogging.
- Such a device for example, DE 10 2007 035 027, which discloses a viewing window for an optical sensor and / or detection system, wherein within the viewing window at least one field of view of the optical system is defined.
- a device for window heating is arranged around the field of view surrounding a device for window heating.
- the window heating is realized by means of thermal lines or as a heating wire, which is integrated into the disc and used to heat the field of view and thus to release of fog.
- the invention is therefore based on the object, a device for releasing fogging of a vehicle window which is less expensive and more efficient than the systems known from the prior art.
- the aim is in particular to effectively and efficiently eliminate windshield fogging in the field of vision of an optical sensor system by generating heat as quickly as possible and exactly where it is required.
- the device according to the invention is preferably arranged in the interior of a vehicle, in particular behind a vehicle window of the vehicle, e.g. the windshield, and includes a housing and at least one optical sensor system.
- the at least one optical sensor system of the device according to the invention can serve for the detection of information from the surroundings of the vehicle and data and information for one or more
- the device according to the invention furthermore comprises at least one active light source, for example a light-emitting diode, which generates or emits electromagnetic radiation.
- the at least one active light source serves, in particular, to radiate electromagnetic radiation onto at least part of the area of the vehicle window, through or onto which the at least one optical sensor system looks, in particular in order to heat this area.
- the entire area of the vehicle window can be illuminated and heated, through or onto which the at least one optical sensor system of the device according to the invention faces.
- the warming of the Vehicle window is in particular such that the electromagnetic radiation emitted by the active light source is at least partially absorbed by the material of the vehicle window and converted into heat.
- the at least one active light source can be configured in such a way that it emits electromagnetic radiation from a specific wavelength range, in particular in a specific range between 200 nm and 1200 nm, ie from the ultraviolet range via visible light to the infrared range.
- the at least one active light source is preferably arranged in a cavity between the housing of the device according to the invention and the vehicle window, in particular in the view funnel of the at least one optical sensor system with direct emission direction in the direction of the vehicle window.
- the at least one active light source is preferably used to eliminate fog, which forms in certain weather ⁇ or environmental conditions on the inside and / or on the outside of the vehicle window, by the heating of the vehicle window.
- the region of the vehicle window, which is to be freed from fog has a temperature which is only slightly increased in relation to the temperature of the remaining area of the vehicle window. It suffices, for example, if a temperature difference of, for example, 1 ° C. is achieved by the irradiation of the vehicle window with the active light source, so that the moisture settles in the areas of the vehicle window which have a lower temperature and are not within the viewing range of the at least one optical sensor system.
- the at least one active light source is preferably used only when there is actually fogging on the vehicle window or when the use of the at least one active light source to heat the vehicle window is actually necessary.
- the activation of the at least one active light source can take place, for example, if it is detected by the at least one optical sensor system of the device according to the invention that obstructions and / or fog are located on the inside and / or outside of the vehicle window.
- the heating of the disc in addition to the elimination of fog, serve other purposes, for example, with appropriate design of the active light source with very high performance for eliminating or defrosting of snow and ice on the outside and / or inside of the vehicle window.
- a significant advantage of the device according to the invention with an active light source for releasing window fitting is that compared to thermal heating cables no electrical and / or mechanical connections within the vehicle window are necessary and no connections to located within the disc heating elements. The release of fitting takes place in particular contactless.
- the at least one optical sensor system of the device according to the invention is preferably a lidar sensor, a camera system or other optical detection and / or environmental detection, wherein the combined use of two or even further optical sensor systems in a device according to the invention is possible.
- the device according to the invention comprises, for example, a camera system and a lidar sensor.
- the camera system which can be arranged in the device according to the invention, preferably comprises an image sensor, for example a CMOS or CCD image chip, having a surface sensitive to electromagnetic radiation and an imaging system or a lens for projecting electromagnetic radiation onto the surface sensitive surface of the image sensor.
- the camera system is preferably arranged in the housing of the device according to the invention with a view towards an area of the vehicle window, eg for rain detection, and / or with viewing direction through an area of the vehicle window into an ambient area of the vehicle, eg in the direction of travel of the vehicle.
- the device according to the invention comprises at least one
- the scattered light diaphragm is preferably arranged for the at least one optical sensor system in the housing of the device according to the invention, in particular in the cavity or in the hopper of the optical sensor system between the housing and the vehicle window.
- the scattered light diaphragm preferably serves to prevent stray light from being incident into the at least one optical sensor system, for example into the imaging system of a camera system, e.g. due to reflections on the vehicle window and / or on elements of the device according to the invention itself.
- the light-scattering screen can be arranged, for example, below the optical axis and horizontally or at a certain angle of inclination to the optical axis of the at least one optical sensor system.
- the at least one active light source is preferably arranged within the scattered light diaphragm, in particular with direct emission direction in the direction of the vehicle window.
- the at least one active light source can be equipped, for example, on a printed circuit board, which is arranged below the scattered light diaphragm, and emit electromagnetic radiation through a recessed area of the scattered light diaphragm on the vehicle window.
- the device according to the invention is configured with a scattered light diaphragm for the at least one optical sensor system and the at least one active light source is arranged below the scattered light diaphragm.
- the at least one active light source is arranged in the direction of the vehicle window, in particular with the emission direction through the scattered light diaphragm, wherein the scattered light diaphragm is designed with electromagnetic filter characteristics at least in the transmission range of the electromagnetic radiation emitted by the at least one active light source.
- the scattered light diaphragm can be designed, for example, in the transmission region of a preferably black material which is permeable to electromagnetic radiation from the infrared range.
- the lens hood from the outside is homogeneous, and that the at least one active light source below the lens hood, due to the black but infrared-transparent material, is invisible and the optical path of the at least one optical sensor system of device according to the invention does not interfere.
- the at least one active light source is a light-emitting diode, for example an LED (light-emitting diode) or OLED (organic light-emitting diode).
- a light-emitting diode for example an LED (light-emitting diode) or OLED (organic light-emitting diode).
- any known light-emitting diode can be used for heating the vehicle window, since, as already described above, a temperature difference of only a few degrees Celsius is sufficient so that the moisture or the window fitting does not settle in the viewing area of the at least one optical sensor system, but in particular on other areas the vehicle window.
- Such temperature differences can be achieved with light-emitting diodes with low power, for example, light-emitting diodes, which are operated at 70 mA or light emitting diodes with a power consumption of 1 W.
- light-emitting diodes which are operated at 70 mA or light emitting diodes with a power consumption of 1 W.
- a high-performance light emitting diode as the active light source, for example light emitting diodes which are operated with up to 500mA or have a power consumption of 3 W or 5W.
- the at least one active light source is a laser diode.
- the electromagnetic radiation emitted by the at least one active light source is electromagnetic radiation in the infrared range, ie in particular electromagnetic radiation in the wavelength range of greater than or equal to 750 nm
- an active light source may be configured with an electromagnetic filter, or an infrared LED or an infrared diode may be used as the active light source.
- Particularly advantageous in this embodiment is the fact that electromagnetic radiation in the infrared range is not visible to the human eye and the at least one optical sensor system, in particular in the embodiment of the sensor system with infrared filter, also by electromagnetic radiation in the infrared range is not disturbed.
- the vehicle window in particular when the vehicle window is the windscreen of the vehicle, at least in a part of the area, through or on which the at least one optical sensor system views, with infrared filter properties and / or UV filter properties designed.
- the entire vehicle window has electromagnetic filter properties, for example, to prevent the passenger compartment or the vehicle interior from being heated to a great extent by intensive solar radiation.
- Vehicle windows with infrared or UV filter properties, in particular windshields, are already standard features in many vehicles. Especially at
- Embodiment of the device according to the invention with an active light source emitting electromagnetic radiation in the infrared range the infrared radiation of the light source is even better absorbed and converted into heat when irradiating the vehicle window (with IR blocking) in this case.
- the fact that the function of the at least one optical sensor system is not disturbed, in particular when the sensor system is equipped with an infrared filter, e.g. with a filter glass in the imaging system, or by a suitable timing of the at least one active light source.
- the at least one active light source is mounted on a printed circuit board, for example as an SMD component (surface-mounted device).
- the circuit board can already Component of the electronics of the at least one optical sensor system of the device according to the invention, so that in an advantageous manner, additional circuit complexity for the arrangement of the at least one active light source is avoided.
- the circuit board on which the at least one active light source is equipped preferably below the lens hood in the housing of the device according to the invention.
- the at least one active light source is used for further functions.
- the at least one active light source can be used, for example, to detect obstructions on the vehicle window, in particular pollution, rain, snow and / or ice, for example by evaluating the electromagnetic radiation emitted by the light source and reflected by obstructions by means of the at least one optical sensor system Device according to the invention.
- the at least one active light source can furthermore advantageously be used for the transmission of data signals. When configuring the at least one active light source as infrared-emitting diodes, this can be used, for example, to generate a data stream or a useful signal for various data transmission applications, e.g. for analysis functions in the workshop or for car-2-car communication.
- a further advantageous function of the at least one active light source can be to produce a specific operating temperature for the at least one optical sensor system when the device according to the invention is put into operation, for example when starting the vehicle. Is it For example, when commissioning the device according to the invention particularly cold (eg -30 ° or -40 ° C), for example, at least the optical path of the at least one optical sensor system can be heated by means of the at least one active light source.
- the device can also be designed with one or more active light sources, in particular in order to increase the power with respect to the heat generated.
- the vehicle window behind which the device according to the invention is arranged, it is preferably the windshield of a vehicle, which may also be any other vehicle window, such as the rear window or a side window.
- the at least one optical sensor system arranged in the device according to the invention can be used to detect another surrounding area of the vehicle, for example a lead-in area, a side area or
- driver assistance systems include, in particular, anti-lock braking systems (ABS),
- ASR Traction control
- ESP Electronic Stability Program
- EDS Electronic differential lock
- Auto light Adaptive Headlights
- Adaptive High Beam Assistant Night Vision Assistant
- Night Vision Automatic windscreen wiper
- HUD Head-Up Display
- BAS Brake Assist
- ANB Automatic Emergency Braking
- Hill Start Assist Hill Descent Control
- Cruise Control Cruise Control
- Adaptive cruise control ACC
- distance warning blind spot monitoring
- traffic jam assistant lane departure warning system
- lane departure warning / lane departure assistant lane departure support
- lane change support lane change support
- lane change assistance Intelligent Speed Adaptation
- ISA Intelligent Speed Adaptation
- Car2Car Communication Tire Pressure Monitoring System
- Parking Assistance ultrasonic sensors for obstacle and distance detection
- driver drowsiness detection Traffic Sign Recognition.
- Fig. 1 shows a simplified representation of a preferred embodiment of the device according to the invention.
- the device of Fig. 1 is arranged in this case behind a windshield 1 in the interior of a vehicle.
- the device comprises a housing 2, in which a camera system, as an optical sensor system, is arranged.
- the camera system comprises an image sensor 3 on a printed circuit board and an imaging system, in this case an objective 4 with a plurality of lenses 5, which serves for the projection of electromagnetic radiation onto a surface of the image sensor 3 that is sensitive to electromagnetic radiation.
- the camera system is aligned with the viewing direction 6 through a region 7 of the windshield 1, in this case for detecting an environmental region of the vehicle ahead in the direction of travel.
- the device according to the invention corresponding to FIG.
- the camera system can also serve to detect a region of the windshield 1 itself, for example for rain detection.
- the apparatus of Fig. 1 further comprises a lens hood 8, which is arranged in the view funnel of the camera system behind the windshield 1, wherein the view funnel of the camera system exists in the form of a cavity 9 between the housing 2 and windshield 1 or as a cavity between the windshield 1 of the Vehicle and the lens 4 and the lens hood 8 of the device according to the invention.
- the device according to the invention from FIG. 1 furthermore comprises an active light source 10, in this case an infrared light-emitting diode (LED).
- an active light source 10 in this case an infrared light-emitting diode (LED).
- LED infrared light-emitting diode
- electromagnetic radiation from the infrared range can be emitted to the windshield 1, in particular to the area 7 through which the camera system of the device according to the invention looks.
- the electromagnetic radiation emitted by the light-emitting diode is at least partially absorbed by the material of the windshield 1 and converted into heat, as a result of which the windshield 1 heats up in the relevant region 7.
- the heating of the windshield 1 in the viewing area 7 of the camera system preferably serves to remove or release moisture.
- the light-emitting diode is arranged in this special case within the scattered light aperture 8 with direct emission direction 11 in the direction of the windshield 1.
- the light-emitting diode is further arranged on a printed circuit board 12 which is located below the scattered light aperture 8 in the housing 2 of the device according to the invention, wherein the light emitting diode 10 the electromagnetic radiation radiates through a recessed area 13 in the scattered light aperture 8 to the windshield 1.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112012001392T DE112012001392A5 (en) | 2011-06-03 | 2012-05-02 | Device with optical sensor system and anti-fogging solution |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011103340A DE102011103340A1 (en) | 2011-06-03 | 2011-06-03 | Device with optical sensor system and anti-fogging solution |
DE102011103340.1 | 2011-06-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012163342A1 true WO2012163342A1 (en) | 2012-12-06 |
Family
ID=46384080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2012/100123 WO2012163342A1 (en) | 2011-06-03 | 2012-05-02 | Device with an optical sensor system and anti-misting solution |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE102011103340A1 (en) |
WO (1) | WO2012163342A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015509458A (en) * | 2012-03-05 | 2015-03-30 | サン−ゴバン グラス フランスSaint−Gobain Glass France | Wind glass device with baffle plate that can be heated electrically |
GB2559277A (en) * | 2017-01-26 | 2018-08-01 | Ford Global Tech Llc | Self defrosting sensor |
DE102017213079A1 (en) * | 2017-07-28 | 2019-01-31 | Conti Temic Microelectronic Gmbh | sensor assembly |
CN109581325A (en) * | 2017-09-29 | 2019-04-05 | 安波福技术有限公司 | It can be used for the laser radar apparatus with heated cover of automated vehicle |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102013206915A1 (en) * | 2013-04-17 | 2014-10-23 | Continental Teves Ag & Co. Ohg | Apparatus, system and method for identifying busy traffic objects and use of the system |
DE102017210359A1 (en) * | 2017-06-21 | 2018-12-27 | Bayerische Motoren Werke Aktiengesellschaft | A method of controlling a heater for a transparent medium of a vehicle and means of transportation |
DE102019117968A1 (en) * | 2019-07-03 | 2021-01-07 | HELLA GmbH & Co. KGaA | Device for heating a cover of a vehicle |
FR3099435B1 (en) * | 2019-07-29 | 2021-07-30 | Cie Plastic Omnium Se | Connector for motor vehicle wave emission protection device |
DE102022101566B4 (en) | 2022-01-24 | 2024-01-18 | Webasto SE | Sensor arrangement, comprising a sensor module and a disk element, and vehicle roof with such a sensor arrangement |
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EP1580092A2 (en) * | 2004-03-26 | 2005-09-28 | Robert Bosch Gmbh | Camera in a vehicle |
US20060163458A1 (en) * | 2002-05-18 | 2006-07-27 | Elmos Semiconductor Ag | Rain sensor |
DE102006008274A1 (en) * | 2006-02-22 | 2007-08-23 | Siemens Ag | Motor vehicle e.g. lorry, has optical detection device arranged for monitoring external space of vehicle and for detection of objects and climatic conditions in surrounding of vehicle |
DE102007035027A1 (en) | 2007-07-26 | 2009-01-29 | Adc Automotive Distance Control Systems Gmbh | Viewing window for arranging an optical sensor and / or recognition system in a vehicle |
US20090147360A1 (en) * | 2007-12-11 | 2009-06-11 | Ford Global Technologies, Llc | Window with resistance heating element |
DE102010007940A1 (en) * | 2009-02-17 | 2011-02-10 | Niles Co. Ltd. | rain sensor |
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DE3818389C1 (en) * | 1988-05-30 | 1989-10-12 | Optyl Holding Gmbh & Co Verwaltungs-Kg, 8013 Haar, De | |
JP2005007963A (en) * | 2003-06-17 | 2005-01-13 | Calsonic Kansei Corp | Defroster device |
DE102010003938A1 (en) * | 2009-05-04 | 2010-10-14 | Carl Zeiss | Optical arrangement i.e. projection illumination system, operating method for microlithography, involves illuminating lens with light, such that non-uniform temperature distribution is produced in lens to correct defect of system |
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2011
- 2011-06-03 DE DE102011103340A patent/DE102011103340A1/en not_active Withdrawn
-
2012
- 2012-05-02 DE DE112012001392T patent/DE112012001392A5/en active Pending
- 2012-05-02 WO PCT/DE2012/100123 patent/WO2012163342A1/en active Application Filing
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US20060163458A1 (en) * | 2002-05-18 | 2006-07-27 | Elmos Semiconductor Ag | Rain sensor |
EP1580092A2 (en) * | 2004-03-26 | 2005-09-28 | Robert Bosch Gmbh | Camera in a vehicle |
DE102006008274A1 (en) * | 2006-02-22 | 2007-08-23 | Siemens Ag | Motor vehicle e.g. lorry, has optical detection device arranged for monitoring external space of vehicle and for detection of objects and climatic conditions in surrounding of vehicle |
DE102007035027A1 (en) | 2007-07-26 | 2009-01-29 | Adc Automotive Distance Control Systems Gmbh | Viewing window for arranging an optical sensor and / or recognition system in a vehicle |
US20090147360A1 (en) * | 2007-12-11 | 2009-06-11 | Ford Global Technologies, Llc | Window with resistance heating element |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015509458A (en) * | 2012-03-05 | 2015-03-30 | サン−ゴバン グラス フランスSaint−Gobain Glass France | Wind glass device with baffle plate that can be heated electrically |
GB2559277A (en) * | 2017-01-26 | 2018-08-01 | Ford Global Tech Llc | Self defrosting sensor |
CN108363070A (en) * | 2017-01-26 | 2018-08-03 | 福特全球技术公司 | From defrosting sensor |
US10560983B2 (en) | 2017-01-26 | 2020-02-11 | Ford Global Technologies, Llc | Self-defrosting sensor |
CN108363070B (en) * | 2017-01-26 | 2024-03-05 | 福特全球技术公司 | Self-defrosting sensor |
DE102017213079A1 (en) * | 2017-07-28 | 2019-01-31 | Conti Temic Microelectronic Gmbh | sensor assembly |
CN109581325A (en) * | 2017-09-29 | 2019-04-05 | 安波福技术有限公司 | It can be used for the laser radar apparatus with heated cover of automated vehicle |
CN109581325B (en) * | 2017-09-29 | 2024-01-05 | 安波福技术有限公司 | Lidar device with heating cover for an automated vehicle |
Also Published As
Publication number | Publication date |
---|---|
DE112012001392A5 (en) | 2013-12-19 |
DE102011103340A1 (en) | 2012-12-06 |
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