EP3113979A1 - Projecteur de véhicule comportant un dispositif pour déterminer des conditions de la route et système pour surveiller des conditions de la route - Google Patents

Projecteur de véhicule comportant un dispositif pour déterminer des conditions de la route et système pour surveiller des conditions de la route

Info

Publication number
EP3113979A1
EP3113979A1 EP14707755.6A EP14707755A EP3113979A1 EP 3113979 A1 EP3113979 A1 EP 3113979A1 EP 14707755 A EP14707755 A EP 14707755A EP 3113979 A1 EP3113979 A1 EP 3113979A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
headlight
vehicle headlight
light
road conditions
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.)
Withdrawn
Application number
EP14707755.6A
Other languages
German (de)
English (en)
Inventor
Axel SCHMITZ-HÜBSCH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
G Lufft Mess und Regeltechnik GmbH
Original Assignee
G Lufft Mess und Regeltechnik GmbH
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 G Lufft Mess und Regeltechnik GmbH filed Critical G Lufft Mess und Regeltechnik GmbH
Publication of EP3113979A1 publication Critical patent/EP3113979A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/0017—Devices integrating an element dedicated to another function
    • B60Q1/0023—Devices integrating an element dedicated to another function the element being a sensor, e.g. distance sensor, camera
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
    • B60W40/06—Road conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
    • B60W40/06—Road conditions
    • B60W40/068—Road friction coefficient
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
    • G01B11/0625—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating with measurement of absorption or reflection
    • G01B11/0633—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating with measurement of absorption or reflection using one or more discrete wavelengths
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
    • G01N21/3151—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using two sources of radiation of different wavelengths
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3554—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for determining moisture content
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
    • G08G1/0112—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from the vehicle, e.g. floating car data [FCD]
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0125—Traffic data processing
    • G08G1/0133—Traffic data processing for classifying traffic situation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
    • G08G1/0141—Measuring and analyzing of parameters relative to traffic conditions for specific applications for traffic information dissemination
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/096758—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where no selection takes place on the transmitted or the received information
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096775—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a central station
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096791—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is another vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2420/00—Indexing codes relating to the type of sensors based on the principle of their operation
    • B60W2420/40—Photo, light or radio wave sensitive means, e.g. infrared sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2422/00—Indexing codes relating to the special location or mounting of sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
    • G01N2021/3181—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using LEDs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N2021/4704—Angular selective
    • G01N2021/4709—Backscatter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/02—Mechanical
    • G01N2201/021—Special mounting in general
    • G01N2201/0216—Vehicle borne
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's
    • G01N2201/0627—Use of several LED's for spectral resolution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/069—Supply of sources
    • G01N2201/0696—Pulsed

Definitions

  • the invention relates to a vehicle headlight, and a system for monitoring road conditions with a vehicle with the vehicle headlight.
  • the invention provides a vehicle headlamp comprising: a light unit, a reflector and a headlamp lens; and an apparatus for determining road conditions, the apparatus being provided inside the vehicle headlight behind the headlight glass and comprising: an infrared transmitting device configured to emit light of predetermined wavelengths through the headlight glass on a road surface; a detecting device configured to detect the light emitted from the infrared transmitting device and reflected from the road surface through the headlamp lens; a processing device configured to determine surface parameters of the road surface based on the light detected by the detection device.
  • the processing device may be in the form of or comprise a computer.
  • the device for determining the road conditions is provided inside the vehicle headlight.
  • the device can be optimally protected against contamination.
  • the device may be protected from contamination that may occur while the vehicle is traveling.
  • the infrared transmission device of the device is designed to be emitted light of predetermined wavelength in a wavelength range of 780 nm to 2500 nm, for example 780 nm to 1000 nm or 1500 nm, through the headlight glass.
  • the light reflected from the road surface is detected again through the headlight glass.
  • the headlamp glass of a vehicle is one of the elements of the vehicle that is most often cleaned or cleaned, especially in headlamps. For example, the driver of the vehicle will control the headlamp lens more often, at least before each ride.
  • the device may be attached directly to the inside of the headlight glass.
  • the device can be replaceable.
  • the device can be attached directly to the inside, ie behind the headlight glass.
  • the device can be attached and fixed with a suitable fastening means.
  • the device can also be exchangeable. It is also possible to replace the device or the headlight glass together with the device as a modular unit. This also results in the possibility of retrofitting existing vehicle headlights by adding the device or replacing the headlight lens including device.
  • the processing device may be designed to determine the surface parameters of the road surface at least 100 times per second, in particular at least 400 times per second.
  • the device may furthermore comprise a pulse device which is designed to emit the light emitted by the infrared transmitting device in pulses of maximum 500 s duration, in particular highest 100 s duration, and / or pauses of maximum 500 ⁇ duration, in particular highest 100 ⁇ duration to pulse.
  • a pulse device which is designed to emit the light emitted by the infrared transmitting device in pulses of maximum 500 s duration, in particular highest 100 s duration, and / or pauses of maximum 500 ⁇ duration, in particular highest 100 ⁇ duration to pulse.
  • the device Due to the pulses of the pulse device, the device can emit the light required for the measurement effectively and with short dead times. Furthermore, the pulse gives a time constant, a clock, for the measurement and the subsequent determination.
  • the infrared transmitting device may be configured to emit light having at least two predetermined different wavelengths or at least two different wavelength ranges (for detecting wet / wet vs. dry).
  • the different wavelengths emitted by the infrared transmitting device can each lie in the infrared range, wherein furthermore the infrared transmitting device can emit light within a reference wavelength range for calibration, wherein the reference wavelength range is likewise in the infrared range.
  • wavelengths in the infrared range there is no overlap with the visible light range of the headlamp, even no glare from other road users.
  • One of the wavelengths may be particularly suitable for the determination of ice or ice layers on the road, for example, a wavelength of 1500 nm.
  • Another, emitted from the first wavelength, emitted wavelength may be suitable for the determination of thin films of water.
  • a water film of up to about 1 mm thickness on the roadway with a wavelength of 1450 nm can be determined.
  • a further wavelength of about 980 nm can be used.
  • a further wavelength of 1300 nm may be emitted as a reference wavelength for the purpose of calibration, permanently or periodically, or at least at the beginning of the journey.
  • the aforementioned three wavelengths as well as the reference wavelength are each typically different from each other. It is understood that other wavelengths can be used. In general, the wavelengths can be adapted to the absorption bands of water and ice.
  • the surface parameters may include one or more parameters for moisture, ice thickness, snow thickness, water film thickness, ice to water ratio, freezing temperature of an ice-water mixture, salinity of an ice-water mixture, and friction coefficient , These parameters determine the most important parameters for the driver of the vehicle and can be analyzed with regard to possible dangers.
  • the device may further comprise an interface for exchanging data with the Internet and / or a mobile computing device and / or a mobile device.
  • the interface may include, for example, a CAN interface or other typical vehicle interface.
  • information / data obtained with the device may be transmitted to other vehicles.
  • the invention further provides a vehicle, in particular passenger cars or trucks, with at least one vehicle headlight as described above.
  • the vehicle may have a wireless data connection device, which is designed for a data transmission to another vehicle, and a control device, which is designed to transmit data obtained with the device for determining road conditions via the data connection device to the further vehicle. In the future, vehicles will communicate with each other and so an oncoming vehicle can be warned of critical road conditions in advance.
  • the vehicle with the headlight according to the invention may be, for example, a scatter vehicle.
  • the data connection device may be equipped to transmit data with a transmitter and an antenna.
  • the controller may include a computer or a CPU.
  • the invention provides a system for monitoring road conditions, comprising a vehicle as described above and an internet server connected to the device for determining road conditions for the purpose of data exchange, and to a computer device connected via the internet server to this device for the purpose of data exchange is.
  • the monitoring of the road conditions by a vehicle having at least one vehicle headlamp according to the invention can be provided.
  • FIG. 1 Schematic diagram of a vehicle with a vehicle headlamp according to the present invention.
  • Figure 2 Schematic sketch of a vehicle headlight as shown in Figure 1 outlines with a device for determining road conditions according to the present invention.
  • FIG. 3 Schematic diagram of the device from FIG. 2.
  • Figure 4 Schematic sketch of a system for monitoring road conditions, with a vehicle
  • FIG. 1 shows a vehicle 1 with a vehicle headlight 3 according to the present invention.
  • the vehicle is sketched as a passenger car. It is understood, however, that the vehicle may also be a truck or a two-wheeler.
  • an LED device is used as the infrared transmitter. This is to be understood by way of example and alternatively other suitable infrared transmitting devices may be used.
  • the vehicle headlight 3 is sketched in more detail in FIG.
  • the vehicle headlight 3 comprises a light source 7 for generating headlight light.
  • the vehicle headlight comprises a reflector 5 and a headlight lens 9.
  • the headlight lens 9 may comprise a silica-based glass suitable for the vehicle headlight 3 or else plastic such as, for example, acrylic glass or polycarbonate. But there are also other glasses possible.
  • the headlight glass 9 is transparent to the light generated by the light source 7.
  • the vehicle headlight 3 further comprises a device 1 1 for determining road conditions, wherein the device is provided in the interior 10 of the vehicle headlight 3 behind the headlight lens 9. In Figure 2, the device 1 1 is provided immediately behind the headlight glass 9.
  • the device 1 1 be interchangeable. It may also be the headlight glass 9 interchangeable. Additionally or alternatively, the headlight glass 9 together with the device 1 1 be interchangeable, so that there may be different possibilities for maintenance or retrofitting.
  • FIG. 3 outlines a front view of the device 11 of FIG. 2.
  • the device 11 comprises an LED unit 13.
  • the LED unit 13 is shown in FIG. 3 with four LEDs 13L. But there may also be another number of LEDs in the LED unit 13. However, the number of four LEDs 13L has the advantage that each LED 13L can perform a different task.
  • LEDs 13L may emit light in the infrared range. In principle, other wavelengths are possible. On the one hand, light in the infrared range is invisible to other road users, on the other hand it is particularly suitable for the detection of water layers and ice layers, especially on road surfaces.
  • One of the wavelengths emitted by the LEDs 13L of the LED unit 13 may be suitable for the determination of ice or ice layers on the road, for example, a wavelength of 1500 nm.
  • a second LED 13L may emit a wavelength different from the first wavelength, especially may be suitable for the determination of thin water films.
  • a water film of, for example, up to 1 mm thick on the roadway with a wavelength of 1450 nm can be determined.
  • another wavelength can be used with another LED. In particular, this additional wavelength can be about 980 nm.
  • a further wavelength of 1300 nm can be transmitted by means of a fourth LED 13L permanently or periodically or at least at the beginning of the journey.
  • This additional wavelength can serve as reference wavelength for calibration. It is understood that other wavelengths can be used. Likewise, more than four LEDs can be used.
  • the LED unit 13 can be controlled via a pulse unit 19.
  • the pulse unit 19 may be connected to the LED unit via a line 19A.
  • the LED unit 13 transmits light through the headlamp lens 9 with the aid of the LEDs 13L.
  • the light emitted by the LED unit 13 thus falls on the road surface and is reflected there.
  • FIG. 3 further shows a detection device 17, for example a sensor unit, for detecting the light emitted by the LED device 13 and then from the sensor device Road surface reflected light.
  • This reflected light in turn falls through the headlight glass 9 into the interior 10 of the vehicle headlight 3.
  • the detection unit 17 can typically receive information about the light emitted by the LEDs 13L via a line 13 Receive light and, if appropriate, its pulsation.
  • the detection unit 17 can further process the obtained analog light information of the reflected light.
  • the detection unit 17 may be connected to a line 17A with an interface 18.
  • the interface 18 may include a CAN interface or other typical vehicle interface, so that the signals provided by the detection unit 17 can be further processed.
  • FIG. 4 shows a diagram of a system for monitoring road conditions, with a vehicle 1 as described with reference to FIG. 1, the vehicle with at least one vehicle headlight 3 as described with reference to FIG. 2 and the vehicle headlight 3 with a device as described with reference to FIG , FIG. 4 further shows that in the system the vehicle can be connected via a wireless connection 30 to an internet server 31 with which the analysis of the roadway surfaces obtained by the vehicle can be further processed.
  • the Internet server 30 can be connected via a connection 31 L to a data memory 33, for example a data cloud, in which the information can be stored by the Internet server.
  • the information from the data memory 33 may be accessed via a connection 33L and may be provided to multiple drivers of vehicle or vehicle steering systems.
  • the vehicle may be connected via the wireless connection 30 with at least one further vehicle for data transfer / exchange.
  • the information / data on the road surfaces can be obtained with the device described with reference to Figure 3 and then sent via the wireless link 30 to the other vehicle.

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Abstract

L'invention concerne un projecteur de véhicule (3) qui comprend : une unité lumineuse, un réflecteur (5) et une vitre de projecteur (9) ; un dispositif (11) destiné à déterminer des conditions de la route, le dispositif étant prévu à l'intérieur du projecteur de véhicule (3) derrière la vitre de projecteur (9) et comprenant : un dispositif émetteur d'infrarouges (13) qui est conçu pour projeter de la lumière dans des longueurs d'onde prédéterminées sur une surface de la route à travers la vitre de projecteur (9); un dispositif de détection (17) qui est conçu pour détecter à travers la vitre du projecteur (9) la lumière émise par le dispositif d'émission d'infrarouges (13) et réfléchie par la surface de la route ; un dispositif de traitement qui est conçu pour déterminer des paramètres de surface de la surface de la route, sur la base de la lumière détectée par le dispositif de détection (17).
EP14707755.6A 2014-03-03 2014-03-03 Projecteur de véhicule comportant un dispositif pour déterminer des conditions de la route et système pour surveiller des conditions de la route Withdrawn EP3113979A1 (fr)

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PCT/EP2014/054075 WO2015131923A1 (fr) 2014-03-03 2014-03-03 Projecteur de véhicule comportant un dispositif pour déterminer des conditions de la route et système pour surveiller des conditions de la route

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EP3113979A1 true EP3113979A1 (fr) 2017-01-11

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US (1) US20170072834A1 (fr)
EP (1) EP3113979A1 (fr)
KR (1) KR101862831B1 (fr)
CN (1) CN106573569A (fr)
CA (1) CA2941270A1 (fr)
WO (1) WO2015131923A1 (fr)

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CN114270176A (zh) * 2019-09-11 2022-04-01 松下知识产权经营株式会社 水分感知装置

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KR101862831B1 (ko) 2018-05-30
CA2941270A1 (fr) 2015-09-11
KR20160130437A (ko) 2016-11-11
CN106573569A (zh) 2017-04-19
WO2015131923A1 (fr) 2015-09-11

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