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WO2013091619A1 - Procédé et dispositif pour détecter de l'humidité sur une vitre de véhicule - Google Patents

Procédé et dispositif pour détecter de l'humidité sur une vitre de véhicule Download PDF

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Publication number
WO2013091619A1
WO2013091619A1 PCT/DE2012/100379 DE2012100379W WO2013091619A1 WO 2013091619 A1 WO2013091619 A1 WO 2013091619A1 DE 2012100379 W DE2012100379 W DE 2012100379W WO 2013091619 A1 WO2013091619 A1 WO 2013091619A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
images
image
radiation source
moisture
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.)
Ceased
Application number
PCT/DE2012/100379
Other languages
German (de)
English (en)
Inventor
Henryk Frenzel
Andreas Aumer
Roland Ertl
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to DE112012003675.1T priority Critical patent/DE112012003675A5/de
Publication of WO2013091619A1 publication Critical patent/WO2013091619A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B60S1/04—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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/143—Sensing or illuminating at different wavelengths
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/50—Context or environment of the image
    • G06V20/56—Context or environment of the image exterior to a vehicle by using sensors mounted on the vehicle
    • G06V20/58—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
    • G06V20/582—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads of traffic signs

Definitions

  • the invention relates to a method for determining moisture on the window of a vehicle by means of a camera device.
  • the invention further relates to a camera device for implementing the method.
  • Driver assistance systems in vehicles often use a camera device to detect the vehicle environment, for example, to detect a wide variety of objects in the vicinity of the vehicle.
  • the camera device is usually arranged behind the windshield of the vehicle and looks in the direction of travel through the disc.
  • vehicle cameras are known for detecting
  • a camera device for detecting a vehicle environment by a vehicle window is shown, eg for traffic sign recognition, which provides a secondary function in the form of rain detection in addition to the detection of the vehicle environment.
  • the camera device has a radiation source, wherein optical radiation emitted by the radiation source can first be input and then decoupled into the vehicle window, and wherein the decoupled part of the optical radiation from the Image pickup element of the camera device is detected.
  • the optical radiation emitted by the radiation source is thereby coupled into the vehicle window in such a way that, when there is no moisture on the vehicle window, it is totally reflected up to the location of the exit. In the event that moisture is on the vehicle window, the total reflected portion of the radiation is reduced. On the basis of the reduced intensity can be determined by means of the camera device moisture on the vehicle window.
  • the camera device includes a
  • Image capturing element by means of which primarily images from the vehicle environment are captured and output as image signals.
  • the camera apparatus further comprises a radiation source for emitting optical radiation onto the vehicle window, wherein at least part of the optical radiation emitted by the radiation source can be detected by the image recording element as a function of the pane state.
  • an evaluation unit is provided, which detects the image signals output by the image recording element and determines therefrom the disk state, in particular by determining light reflections on the vehicle window in the camera image, which superimpose the image of the vehicle surroundings.
  • the invention is therefore based on the object to provide a method and a device with which a more reliable and safer detection of moisture on a vehicle window is possible, as with the previously known solutions.
  • An essential idea of the invention is to realize the determination of moisture on a vehicle window by means of a camera device which is primarily focused on a long range, wherein the vehicle window is illuminated by means of at least one radiation source with optical radiation of different wavelengths, in particular with different colored light ,
  • the illumination with optical radiation of different wavelengths can be implemented in particular with my LED lighting, for example with different colors within an LED (eg multicolor LED) or with individual differently colored LEDs.
  • the invention is based on the idea to illuminate the same scene or the same picture with the same water tropics (or other moist deposits) on the vehicle window in a short time, especially with differently colored light and by color light patterns, ie by light reflections or edge formations, the damp deposits on the disc arise in the same image positions with different colors or wavelength range suitable for lighting, to realize a simple moisture detection.
  • the successive illumination in particular with differently colored light, makes it easy to filter out all other information from the image.
  • the method according to the invention serves to detect moisture on a window of a vehicle, in particular moist deposits, such as snow, ice and / or rain.
  • moist deposits such as snow, ice and / or rain.
  • the information about moisture can in particular of vehicle systems or for
  • Driver assistance functions are used, for example, for systems for the automatic control of windshield wipers, window heaters or a sunroof and / or for conditioning of various driving stability systems, such as ESP, ABS, etc.
  • a camera device is preferably used which is arranged in the interior of a vehicle behind a pane and in which images from a vehicle environment can be detected through the pane by means of an image recording element, in particular by arranging the camera device through the pane with a viewing direction and is focussed to a far end or to infinity, for example to distances greater than 10 m and / or to distances in the range of 10 to 50 m.
  • the camera device can furthermore comprise at least one radiation source, by means of which optical radiation can be output, in particular onto and / or into the window of the vehicle, as well as onto a region of the window through which the camera device looks and detects the vehicle surroundings.
  • the at least one radiation source is preferably arranged such that in the presence of moisture on the disc, the optical radiation emitted by the radiation source or at least part of the optical radiation can be detected by the image recording element.
  • the optical radiation emitted by the radiation source can thereby at least partially, for example, the image from the vehicle environment, i. in individual image areas, overlay, for example in the form of blurred structures or light patterns.
  • the method according to the invention can therefore be used in principle in any camera device known from the prior art, in particular focused on a long-range area which is arranged in the vehicle interior behind a vehicle window, in particular with a view through the window, the vehicle window or its surface lying in the unsharp area of the camera device and the camera device for detecting moisture comprises at least one radiation source, the optical radiation on and / or in the vehicle window such that when moisture on the vehicle window at least a portion of the optical radiation can be detected by the camera device, in particular as blurred light pattern or structures which at least partially overlap the captured by the camera device image of the vehicle environment.
  • the windshield of the vehicle In the window of the vehicle, behind which the camera device is arranged and on which by means of the method according to the invention or by means of the device according to the invention moisture is detected, it is preferable to the windshield of the vehicle.
  • the vehicle environment is preferably an area of the surroundings of the vehicle, in particular the traffic space ahead in the direction of travel.
  • the optical radiation emitted by the at least one radiation source is preferably electromagnetic radiation which is emitted by the radiation source, for example as a function of control signals, the spectral composition or the wavelength of the optical radiation emitted by the radiation source preferably being determinable ,
  • both optical radiation in the visible wavelength range for example in the range from 400 to 700 nm
  • optical radiation in the invisible wavelength range for example infrared or ultraviolet light
  • the radiation source can be, for example, one or more LEDs (LED, light emitting diode) or also one or more multicolor LEDs (multicolor LEDs), ie LEDs which are capable of electromagnetic radiation with different wavelengths or different to produce and output colored light.
  • the at least one radiation source of the camera device can also be arranged in the interior of the vehicle, for example directly behind the vehicle window in the installation space of the camera device and in particular such that the second optical radiation is output directly and / or at a defined angle to the window of the vehicle.
  • the disk can be illuminated from the same position, for example by means of only one radiation source, and / or from different positions, for example by means of a plurality of radiation sources.
  • the optical radiation can be emitted, in particular, freely onto the vehicle window by means of the at least one radiation source.
  • one or more coupling elements e.g. Optical fiber made of glass, via which the optical radiation emitted by the at least one radiation source is coupled into the pane.
  • the optical radiation emitted by the radiation source can also be output onto and / or into the pane at such an angle that the optical radiation is guided by total reflection in the pane.
  • the optical radiation output by the at least one radiation source is preferably detected by the image recording element of the camera device only when moisture is present on the vehicle window, in particular when the optical radiation emitted by the at least one radiation source is blocked by moist deposits, e.g. Raindrops, in the direction of the focused on the far range
  • Camera device is reflected.
  • at least two measurements are performed.
  • optical radiation having a different wavelength is emitted by the at least one radiation source, that is to say in particular differently colored light.
  • the image signals output by the image recording element during the at least two measurements are detected and evaluated to determine moisture.
  • the image signals which are detected in the at least two measurements are preferably one image per measurement, which was output by the image recording element in the form of image signals, which in particular is an image of the vehicle surroundings, which in the presence of Moisture on the disc is superimposed by the optical radiation emitted by the radiation source during the measurements.
  • the method according to the invention can thus be designed, for example, such that optical radiation is emitted from a first wavelength range from the at least one radiation source and a first image output from the image recording element is detected, and optical radiation from the at least one radiation source during a second measurement a second wavelength range and a second image is detected.
  • the image signals or the images can be detected, for example, by means of an image processing device and evaluated for detecting moisture on the vehicle window. In the evaluation, it can be compared, in particular, in which areas of the images the same structures or light reflections with different colors or with different wavelengths appear, matching the wavelengths output by the radiation source, these structures then being exposed to moist deposits in the vicinity, ie on the vehicle window , interpret. About a certain number Such structures can be closed, for example, rain.
  • three or more measurements can also be carried out, wherein, analogously to the preceding description, optical radiation with a different wavelength is output for each measurement from the radiation source and the image signals or images of the vehicle environment output by the image recording element are recorded and evaluated during each measurement ,
  • a significant advantage of the method according to the invention is the fact that the illumination of the vehicle window with optical radiation of different wavelengths, according to the method of the invention, the detection of moisture on the vehicle window is significantly simplified, since the optical radiation detected from the blur range of the camera device will be easily separated from optical radiation detected from the vehicle environment.
  • the at least two measurements are carried out consecutively and in particular in a very short time interval, for example within a time window of 5 ms.
  • the at least two measurements are carried out directly consecutively, ie the at least one radiation source is switched directly from one wavelength of a preceding measurement to the wavelength of the subsequent measurement, wherein according to the invention at least one image output by the image recording element in the form of image signals is acquired for each measurement and the during the measurements captured images are evaluated for the determination of moisture.
  • the determination of moisture on the vehicle window takes place by a comparison of the images which are acquired by the image recording element in the at least two measurements and output in the form of image signals.
  • fuzzy light patterns or structures are preferably determined in the images, which have a substantially identical shape and / or are determined in the same image areas of the images.
  • the blurred light patterns are, in particular, blurred structures recognized in the images whose spectral composition or their wavelengths respectively correspond to the wavelengths which were emitted by the radiation source in the individual measurements.
  • the said blurred light patterns can arise, in particular, when the optical radiation emitted by the at least one radiation source is refracted, scattered and / or reflected by moist deposits on the vehicle window, for example to rain or water droplets.
  • Blurred light patterns of substantially identical shape are understood to mean, in particular, light patterns whose shape does not show any or only slight differences from image to image, for example if a run-off of individual moist deposits occurs between the acquisition of individual images of successive measurements.
  • Blurred light patterns, which are determined in the same image areas are to be understood in particular as light patterns which are determined in all images and whose position, e.g. Distances to the image edges, is identical in all images.
  • a specific number of light patterns is determined, in particular whose shape or structure in the individual images of the different measurements is identical and / or which are recognized in the same image areas.
  • the image information of the vehicle environment is filtered out of the images in the determination of moisture.
  • the camera apparatus preferably comprises a control and / or evaluation unit for controlling the at least one radiation source and for synchronizing illumination and image processing in the at least two measurements such that optical radiation of different wavelength is output from the radiation source in the at least two measurements and in each case at least one image of the vehicle environment, for example from one, emitted by the image recording element in the form of image signals in synchronism with the output of the optical radiation
  • Image processing device is detected and evaluated according to the inventive method.
  • control ⁇ and / or evaluation unit for synchronizing illumination and image processing can in particular also be the image processing device, that is the synchronization of illumination image processing is preferably carried out directly by the image processing means by which evaluated the images of at least two measurements.
  • Fig. 1 shows an example of a camera device for implementing the method according to the invention.
  • FIGS. 2 a and 2 b show, by way of example, images which, in the context of the method according to the invention, can be detected by the image recording element during two measurements with different illumination.
  • FIG. 1 shows an example of a camera device which can be used in the context of the method according to the invention for detecting moisture 1 on the window 2 of a vehicle.
  • the camera device is arranged in this case behind the windshield 2 in the interior of the vehicle.
  • the camera apparatus comprises a housing 3, an image recording element 4, which is arranged on a printed circuit board 5, and a lens 6 with a plurality of lenses 7, which as an imaging system for the projection of optical radiation 8 from a remote area to a surface sensitive to optical radiation 8,12 of
  • Image pickup element 4 is used and thus for capturing an image of the vehicle environment.
  • the camera device is aligned with a viewing direction through an area 9 of the windshield 2, in this case for detecting a traffic space of the vehicle ahead in the direction of travel.
  • the windshield 2 itself is therefore located in the blur area of the camera device, ie objects 1 located on the windshield 2 do not result in any sharp focus on the image pickup element 4.
  • the camera device according to FIG. 1 serves primarily to capture and output images B1, B2 from the direction of travel the surrounding area of the vehicle, in particular in the form of image signals, eg for object, lane and / or traffic sign recognition.
  • the camera device is also designed for implementing a secondary function, in particular for determining moisture 1 on the windshield 2 according to the method according to the invention, and for this purpose comprises a radiation source 10, which in an example of FIG. 1 is located within a recess of a scattered light diaphragm 11
  • Camera device is arranged on a circuit board 5.
  • the radiation source 10 is, for example, an LED, by means of which optical radiation 12 can be output to the windscreen 2, in particular to the area 9, by the camera device detects the images Bl, B2 from the vehicle surroundings.
  • the image recording element 4 detects the image recording element 4, for example due to reflection, scattering and / or refraction of the optical radiation 12 to water drops 1 in the direction of the lens 6 of the camera device, eg at the interface of the media glass (disk) and water (raindrops).
  • the images Bl, B2 of the vehicle surroundings detected by the image recording element 4 and output in the form of image signals are superimposed in this case by the optical radiation 12 emitted by the radiation source 10, for example in the form of blurred structures or light patterns 1.1, 1.2 and 1.3, as shown by way of example in FIGS. 2a and 2b.
  • At least two measurements are carried out in which optical radiation 12 with different wavelengths W1, W2 is output from the radiation source 10 and the images B1, B2 output from the image recording element 4 as image signals during the at least two measurements are detected and used for detection evaluated by humidity 1 become.
  • the images Bl, B2 acquired during the at least two measurements can be evaluated, for example, by means of an image processing device (not shown) designed to implement the method according to the invention.
  • the evaluation or the determination of moisture 1 preferably takes place by a comparison of the images B1, B2 recorded in the at least two measurements, where blurred light patterns 1.1, 1.2 and 1.3, which have an identical shape, are determined in the acquired images B1, B2 and / or which are determined in the same image areas and whose wavelengths W1, W2 respectively correspond to the wavelength W1, W2 of the optical radiation 12 emitted by the radiation source 10 in the at least two measurements.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un procédé pour détecter de l'humidité (1) sur une vitre (2) d'un véhicule, au moyen d'une caméra, et une caméra permettant de mettre en oeuvre ledit procédé.
PCT/DE2012/100379 2011-12-20 2012-12-13 Procédé et dispositif pour détecter de l'humidité sur une vitre de véhicule Ceased WO2013091619A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112012003675.1T DE112012003675A5 (de) 2011-12-20 2012-12-13 Verfahren und Vorrichtung zur Ermittlung von Feuchtigkeit auf einer Fahrzeugscheibe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011056690.2 2011-12-20
DE102011056690A DE102011056690A1 (de) 2011-12-20 2011-12-20 Verfahren und Vorrichtung zur Ermittlung von Feuchtigkeit auf einer Fahrzeugscheibe

Publications (1)

Publication Number Publication Date
WO2013091619A1 true WO2013091619A1 (fr) 2013-06-27

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PCT/DE2012/100379 Ceased WO2013091619A1 (fr) 2011-12-20 2012-12-13 Procédé et dispositif pour détecter de l'humidité sur une vitre de véhicule

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DE (2) DE102011056690A1 (fr)
WO (1) WO2013091619A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014108123A1 (fr) * 2013-01-11 2014-07-17 Conti Temic Microelectronic Gmbh Éclairage pour détecter des gouttes de pluie sur une vitre au moyen d'une caméra
WO2019206596A1 (fr) 2018-04-27 2019-10-31 Robert Bosch Gmbh Procédé de détection d'endommagements et/ou d'impuretés sur un matériau de recouvrement transparent d'un capteur optoélectronique, système, capteur optoélectronique et moyen de locomotion
CN113390794A (zh) * 2020-03-13 2021-09-14 弗劳恩霍夫应用研究促进协会 用于检测表面上的水的设备和用于检测表面上的水的方法

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
DE102013101746A1 (de) 2013-02-21 2014-08-21 Conti Temic Microelectronic Gmbh Optische Regensensorvorrichtung für ein Fahrzeug
US9245333B1 (en) 2014-12-10 2016-01-26 Semiconductor Components Industries, Llc Systems and methods for detecting obstructions within the field-of-view of an image sensor

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DE102004015040A1 (de) 2004-03-26 2005-10-13 Robert Bosch Gmbh Kamera in einem Kraftfahrzeug
WO2006015905A1 (fr) * 2004-08-04 2006-02-16 Siemens Aktiengesellschaft Module optique pour un systeme d'assistance au conducteur operant une detection dans l'espace exterieur avant, dans le sens de roulement, d'un vehicule a moteur
DE102009000003A1 (de) 2009-01-02 2010-07-08 Robert Bosch Gmbh Kameraanordnung zur Erfassung eines Scheibenzustandes einer Fahrzeugscheibe
FR2944602A1 (fr) * 2009-04-16 2010-10-22 Valeo Vision Systeme de detection de gouttes d'eau sur une glace
US20110204206A1 (en) * 2010-02-24 2011-08-25 Niles Co., Ltd. Rain sensor

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DE19803694C1 (de) * 1998-01-30 1999-04-22 Kostal Leopold Gmbh & Co Kg Verfahren zum Detektieren von auf einer lichtdurchlässigen Scheibe befindlichen Objekten sowie Vorrichtung
US6573490B2 (en) * 2001-06-28 2003-06-03 Valeo Electrical Systems, Inc. Interleaved mosaic imaging rain sensor
DE102005037271A1 (de) * 2005-08-08 2007-02-15 Robert Bosch Gmbh Regensensor
DE102006044792A1 (de) * 2006-09-13 2008-03-27 Schefenacker Vision Systems Germany Gmbh Sensor zur Detektion von Schmutz und/oder Regen und Verfahren zum Betreiben eines Sensors
DE102008043685A1 (de) * 2008-11-12 2010-05-20 Robert Bosch Gmbh Regensensor

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DE102004015040A1 (de) 2004-03-26 2005-10-13 Robert Bosch Gmbh Kamera in einem Kraftfahrzeug
WO2006015905A1 (fr) * 2004-08-04 2006-02-16 Siemens Aktiengesellschaft Module optique pour un systeme d'assistance au conducteur operant une detection dans l'espace exterieur avant, dans le sens de roulement, d'un vehicule a moteur
DE102009000003A1 (de) 2009-01-02 2010-07-08 Robert Bosch Gmbh Kameraanordnung zur Erfassung eines Scheibenzustandes einer Fahrzeugscheibe
FR2944602A1 (fr) * 2009-04-16 2010-10-22 Valeo Vision Systeme de detection de gouttes d'eau sur une glace
US20110204206A1 (en) * 2010-02-24 2011-08-25 Niles Co., Ltd. Rain sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014108123A1 (fr) * 2013-01-11 2014-07-17 Conti Temic Microelectronic Gmbh Éclairage pour détecter des gouttes de pluie sur une vitre au moyen d'une caméra
US9720132B2 (en) 2013-01-11 2017-08-01 Conti Temic Microelectronic Gmbh Illumination for the detection of raindrops on a window by means of a camera
WO2019206596A1 (fr) 2018-04-27 2019-10-31 Robert Bosch Gmbh Procédé de détection d'endommagements et/ou d'impuretés sur un matériau de recouvrement transparent d'un capteur optoélectronique, système, capteur optoélectronique et moyen de locomotion
CN113390794A (zh) * 2020-03-13 2021-09-14 弗劳恩霍夫应用研究促进协会 用于检测表面上的水的设备和用于检测表面上的水的方法

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Publication number Publication date
DE112012003675A5 (de) 2014-06-12
DE102011056690A1 (de) 2013-06-20

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