DE102009041544A1 - Device for examining and evaluating windscreen wiper blade, has two or multiple cameras for determination of shade throw illustrated on projection surface - Google Patents

Device for examining and evaluating windscreen wiper blade, has two or multiple cameras for determination of shade throw illustrated on projection surface Download PDF

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Publication number
DE102009041544A1
DE102009041544A1 DE102009041544A DE102009041544A DE102009041544A1 DE 102009041544 A1 DE102009041544 A1 DE 102009041544A1 DE 102009041544 A DE102009041544 A DE 102009041544A DE 102009041544 A DE102009041544 A DE 102009041544A DE 102009041544 A1 DE102009041544 A1 DE 102009041544A1
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DE
Germany
Prior art keywords
projection surface
windshield
evaluating
shade
throw
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
DE102009041544A
Other languages
German (de)
Inventor
Marius Stöckmann
Herbert Brandt
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.)
GFE GESELLSCHAFT fur FERTIGUNGSTECHNIK U ENTWICKLUNG SCHMALKALDEN EV
Gfe Ges fur Fertigungstechnik U Entwicklung Schmalkalden E V
Gfe Gesellschaft fur Fertigungstechnik U Entwicklung Schmalkalden Ev
Original Assignee
GFE GESELLSCHAFT fur FERTIGUNGSTECHNIK U ENTWICKLUNG SCHMALKALDEN EV
Gfe Ges fur Fertigungstechnik U Entwicklung Schmalkalden E V
Gfe Gesellschaft fur Fertigungstechnik U Entwicklung Schmalkalden Ev
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 GFE GESELLSCHAFT fur FERTIGUNGSTECHNIK U ENTWICKLUNG SCHMALKALDEN EV, Gfe Ges fur Fertigungstechnik U Entwicklung Schmalkalden E V, Gfe Gesellschaft fur Fertigungstechnik U Entwicklung Schmalkalden Ev filed Critical GFE GESELLSCHAFT fur FERTIGUNGSTECHNIK U ENTWICKLUNG SCHMALKALDEN EV
Priority to DE102009041544A priority Critical patent/DE102009041544A1/en
Priority to DE202009018242U priority patent/DE202009018242U1/en
Publication of DE102009041544A1 publication Critical patent/DE102009041544A1/en
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN]
    • 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
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
    • E05B85/20—Bolts or detents
    • E05B85/24—Bolts rotating about an axis
    • E05B85/26—Cooperation between bolts and detents
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0033—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining damage, crack or wear
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0091—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by using electromagnetic excitation or detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
    • 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
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
    • G01N21/455—Schlieren methods, e.g. for gradient index determination; Shadowgraph
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/958—Inspecting transparent materials or objects, e.g. windscreens
    • 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
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3844—Wiper blades equipped with means to indicate wear or usage of blade
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/306—Accessories, e.g. windows

Abstract

The device has two or multiple cameras for determination of shade throw illustrated on a projection surface (5). The projection surface is implemented as opaque. A light giver is provided, which is focusable. A windshield (3) is arranged opposite to a horizontal plane (7) after a light source (2).

Description

Die Erfindung betrifft eine Einrichtung zum Prüfen und Bewerten von Scheibenwischerblättern die den jeweiligen, das heißt nach einer bestimmten Gebrauchsdauer der Scheibenwischerblätter erreichten Verschleißzustand erkennen lässt und anhand eines auftretenden Schlierenbildes den Verschleiß bzw. die Unzulänglichkeit der Wirkung der Scheibenwischermaterialien, z. B. Gummi und dessen Legierungen, feststellen lässt.The invention relates to a device for testing and evaluation of windshield wiper blades which reveals the respective, ie after a certain period of use of the windshield wiper blades wear condition and based on a streaking image occurring the wear or inadequacy of the effect of the windshield wiper materials, eg. As rubber and its alloys can determine.

Es ist hinreichend bekannt, dass die bei Kraftfahrzeugen zur Anwendung kommenden Scheibenwischer dort an der Windschutzscheibe für das Sauber halten und einen guten Durchblick bestimmend und verantwortlich sind.It is well-known that the windshield wipers used in motor vehicles are used on the windshield for cleaning purposes and that they provide good visibility and are responsible.

Stets dann wenn eine unzureichende, durch verschiedenartige Einflüsse verursachte klare Sicht für den Fahrzeugführer nicht mehr gegeben ist, wird diese Unzulänglichkeit und der die Fahrsicherheit beeinträchtigende Umstand bewusst wahrgenommen.Always when an insufficient, caused by various influences clear view for the driver is no longer given, this inadequacy and the driving safety affecting circumstance is consciously perceived.

Aus diesem Umstand resultiert schon seit längerer Zeit das Bedürfnis, für die Entwicklung und die Auswahl von verschiedenartigen Scheibenwischerbauarten und ebenso verschiedenen Werkstoffen, z. B. bevorzugt Gummi, für die Wischerblätter, eine hinreichende und gesicherte Kenntnis über den Einsatzeffekt und dem Standzeitverhalten dieser Produkte zur Verfügung zu haben.For some time, the need for the development and selection of various types of windscreen wiper and equally different materials, eg. As preferred rubber, for the wiper blades to have a sufficient and assured knowledge of the mission effect and the service life of these products.

Ebenso ist es wünschenswert, möglichst alle von der idealen Klarsicht und dem Reinigungszustand der Sichtscheibe abweichenden Verschmutzungszustände, wozu besonders das Auftreten von Schlieren zu zählen ist, zu erfassen und auf geeignete Art und Weise auszuwerten.Likewise, it is desirable to detect as possible all deviating from the ideal clarity and the cleaning state of the lens pollution conditions, including the occurrence of streaks is to count, and to evaluate in a suitable manner.

Die ermittelten und festgestellten Ergebnisse können hierbei zweckdienlicher weise jeweils aufgabenspezifisch klassifiziert werden.The determined and determined results can be classified task-specifically in each case expediently.

Aus diesen vorgenannten Sachumständen resultiert die Aufgabenstellung der vorliegenden Erfindung. Dabei wurde davon ausgegangen, das ein verschlissenes Scheibenwischerblatt auf der Oberfläche einer KFZ-Sicht- bzw. Frontscheibe verschiedenartige Rückstände, insbesondere Schmutz, also anorganische und/oder organische Rückstände hinterlässt, die es gilt, in Bezug und Angemessenheit der gewünschten Klarsichtqualität zu erfassen und einer entsprechenden Bewertung zu unterziehen um daraus insbesondere Rückschlüsse auf das Standzeitverhalten der Wischergummis in der Form der Wischerlippen, ziehen zu können.From these aforementioned facts results in the task of the present invention. It was assumed that a worn windshield wiper blade on the surface of a car visor or windshield various residues, especially dirt, ie inorganic and / or organic residues leaves, it is important to detect the relation and appropriateness of the desired clarity quality and a to undergo appropriate evaluation in order to draw conclusions about the service life of the wiper rubbers in the form of the wiper lips, in particular.

Die Aufgabe der Erfindung besteht demnach in der Schaffung einer mit optischen Mitteln arbeitenden Einrichtung die es gestattet, den Verschleißzustand der Wischergummis zu prüfen und zu bewerten.The object of the invention is therefore to provide a means working with optical means which allows to check the state of wear of the wiper blades and evaluate.

Diese Aufgabe wird erfindungsgemäß mit den in den Patentansprüchen charakterisierten Merkmalen für eine Einrichtung zum Prüfen und Bewerten von Scheibenwischerblättern gelöst.This object is achieved according to the invention with the features characterized in the claims for a device for testing and evaluating windscreen wiper blades.

Erfindungsgemäß wird hierbei der Schattenwurf der durch verschlissenen Wischergummi erzeugten Schlieren mit Hilfe zweier oder mehrerer Kameras erfasst bzw. aufgenommen, wobei vorzugsweise zwei Kameras zur Anwendung kommen, wobei

  • – die Eine der Kameras und
  • – die Andere der Kameras,
  • – die auf dem Aufnahmeteil der Einrichtung aufgenommene Scheibe in einem Winkelmaß neigbar angeordnet ist, der Lichtgeber fokussierbar ist,
  • – die Projektionsfläche lichtundurchlässig ist.
  • – der Lichtgeber vollständig frei konfigurierbare Muster auf die Projektionsfläche projiziert.
According to the invention, in this case the shadow cast of the streaks generated by worn-out wiper rubber is recorded or recorded with the aid of two or more cameras, with preferably two cameras being used, wherein
  • - the one of the cameras and
  • - the other of the cameras,
  • The disk accommodated on the receiving part of the device is arranged tiltable at an angle, the light source can be focused,
  • - The projection surface is opaque.
  • - The light generator projects completely freely configurable patterns onto the projection screen.

Die hier in Vorschlag gebrachte Einrichtung, vorteilhaft mit elektronischer Bildverarbeitung, ermöglicht eine quantitative Klassifizierung der an Windschutzscheiben auftretenden Schlieren, die nicht, wie bisher üblich vom subjektiven Empfinden des Beobachters abhängig ist. Die Bestimmung der Schlieren und deren Randerscheinungen unter der Anwendung des sogenannten Schattenwurfs ist zudem leicht und verlässlich möglich geworden und durch eine sinnvolle Ausgestaltung auch der konstruktiven Einrichtungselemente kostensparend auszuführen.The device proposed here, advantageously with electronic image processing, enables a quantitative classification of the streaks occurring on windshields, which is not dependent on the subjective perception of the observer, as hitherto usual. The determination of streaks and their marginal appearance under the application of the so-called shadow is also made easy and reliable possible and run through a meaningful design of the structural elements Einrichtungselemente cost-saving.

Ausführungsbeispiel:Embodiment:

Ein Ausführungsbeispiel der Erfindung ist nachfolgend an Hand einer Zeichnung näher erläutert.An embodiment of the invention is explained below with reference to a drawing.

Die Zeichnung zeigt inThe drawing shows in

1 die stilisierte Darstellung des baulichen Aufbaues der Einrichtung im Seitenriss eines z. B. kastenförmigen Gestells mit der räumlichen Anordnung der Prüfelemente, und in 1 the stylized representation of the construction of the facility in the side elevation of a z. B. box-shaped frame with the spatial arrangement of the test elements, and in

2 die ebenso stilisierte Vorderansicht auf die Einrichtung nach 1 der räumlich bestimmten Anordnung der Prüfelemente. 2 the similarly stylized front view of the device 1 the spatially determined arrangement of the test elements.

Die Einrichtung umfasst im wesentlichen eine optischen Messaufbau, bei dem in einem kastenförmigen Aufnahmegestell 1 eine zentralsymmetrische Beleuchtungsquelle als Lampe 2 angeordnet ist deren Licht und Strahlengang von hinten d. h. aus der Sichtebene des Fahrers und eventuell Beifahrers des Kraftfahrzeuges eine/die lichtdurchlässige Windschutzscheibe 3 mit angedeuteten Schlieren 4 auf einer Projektionsfläche 5 ein Schattenbild 6 mit den dort sich vergrößernd darstellenden Schlieren erzeugt.The device essentially comprises an optical measuring setup, in which in a box-shaped receiving frame 1 a centrally symmetrical illumination source as a lamp 2 arranged is the light and beam path from the rear ie from the viewing plane of the driver and possibly the passenger of the motor vehicle / the translucent windshield 3 with indicated streaks 4 on a projection screen 5 a silhouette 6 produced with the there enlarging performing streaks.

Die Windschutzscheibe 3 ist, wie in 1 ersichtlich, gegenüber der horizontalen Ebene 7 und zur Lampe 2 hin um einen Winkel α geneigt aufgenommen in deren geneigten Lage sie mit Waschflüssigkeit aus mehreren, z. B. Wasserdüsen 8, besprüht werden kann. Hierbei sind die Waschdüsen etwas unterhalb der Bildaufnahmetechnik vorgesehen worden, um eine Verschmutzung der Kameraobjektive zu vermeiden.The windshield 3 is how in 1 visible, opposite the horizontal plane 7 and to the lamp 2 towards an angle α inclined recorded in its inclined position with washing liquid from several, z. B. water nozzles 8th , can be sprayed. Here, the washing nozzles have been provided slightly below the image recording technology to avoid contamination of the camera lenses.

Im oberen Bereich der installierten Windschutzscheibe 3, etwa in Höhe der oberen Grenze der Projektionsfläche 5 ist eine geeignete Bildaufnahmetechnik in Form von vorzugsweise 2 Kameras 9 oberhalb der Waschdüsen 8 angeordnet, die das Schattenbild 6 erfassen und in der Lage sind diese in zweckdienender Weise mit Hilfe einer nachgeschalteten Rechentechnik in einem Ergebniswert darstellen.In the upper part of the installed windshield 3 , approximately at the level of the upper limit of the projection surface 5 is a suitable image acquisition technique in the form of preferably 2 cameras 9 above the washing nozzles 8th arranged the silhouette 6 capture and be able to present them in an appropriate manner with the help of a downstream computing technique in a result value.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Aufnahmegestellreceiving stand
22
Lampe/LichtquelleLamp / light source
33
WindschutzscheibeWindshield
44
SchlierenSchlieren
55
Projektionsflächeprojection
66
Schattenbildsilhouette
77
HorizontalebeneWL
88th
WaschflüssigkeitsdüsenWasher fluid nozzles
99
BildaufnahmetechnikImage capture technology
αα
Neigungswinkel der Windschutzscheibe 3 Tilt angle of the windshield 3

Claims (4)

Einrichtung zum Prüfen und Bewerten von Scheibenwischerblättern gekennzeichnet durch folgende Merkmale: – zur Erfassung des auf der Projektionsfläche (5) abgebildeten Schattenwurfes sind zwei oder mehrere Kameras vorgesehen; davon vorzugsweise eine für den Sichtbereich des Fahrers, eine weitere vorzugsweise für den Sichtbereich des Beifahrers – die Projektionsfläche (5) ist lichtundurchlässig ausgeführt; – der Lichtgeber ist fokussierbar; – die Windschutzscheibe (3) ist gegenüber der Horizontalebene (7) nach der Lichtquelle (2) hin in einem Winkel α von etwa 30°–40° geneigt angeordnet;Device for testing and evaluating windscreen wiper blades characterized by the following features: - for detecting the image on the projection surface ( 5 ) shadow cast two or more cameras are provided; preferably one for the field of vision of the driver, another preferably for the field of vision of the passenger - the projection surface ( 5 ) is made opaque; - The light generator is focusable; - the windshield ( 3 ) is opposite the horizontal plane ( 7 ) according to the light source ( 2 ) inclined at an angle α of about 30 ° -40 ° inclined; Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass vorzugsweise zwei Kameras (9) in Höhe der Projektionsfläche (5) und zueinander derart angeordnet sind, dass ihr symmetrischer Abstand zueinander etwa der Hälfte der Länge der Windschutzscheibe entspricht.Device according to claim 1, characterized in that preferably two cameras ( 9 ) at the level of the projection surface ( 5 ) and are arranged to each other such that their symmetrical distance corresponds to each other about half the length of the windshield. Einrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Lichtquelle (2) zur Windschutzscheibe (3) etwa achsmittig, d. h. zentral zur Fläche der Windschutzscheibe (3) angeordnet ist.Device according to claim 1 and 2, characterized in that the light source ( 2 ) to the windscreen ( 3 ) approximately axially, ie centrally to the surface of the windshield ( 3 ) is arranged. Einrichtung nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass der Lichtgeber (2) frei konfigurierbare Messmuster auf die Projektionsfläche erzeugt.Device according to claim 1 to 3, characterized in that the light transmitter ( 2 ) generates freely configurable measurement patterns on the projection surface.
DE102009041544A 2009-09-15 2009-09-15 Device for examining and evaluating windscreen wiper blade, has two or multiple cameras for determination of shade throw illustrated on projection surface Ceased DE102009041544A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102009041544A DE102009041544A1 (en) 2009-09-15 2009-09-15 Device for examining and evaluating windscreen wiper blade, has two or multiple cameras for determination of shade throw illustrated on projection surface
DE202009018242U DE202009018242U1 (en) 2009-09-15 2009-09-15 Device for checking and evaluating windscreen wiper blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009041544A DE102009041544A1 (en) 2009-09-15 2009-09-15 Device for examining and evaluating windscreen wiper blade, has two or multiple cameras for determination of shade throw illustrated on projection surface

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DE102009041544A1 true DE102009041544A1 (en) 2011-03-24

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DE102009041544A Ceased DE102009041544A1 (en) 2009-09-15 2009-09-15 Device for examining and evaluating windscreen wiper blade, has two or multiple cameras for determination of shade throw illustrated on projection surface

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106289752A (en) * 2016-09-18 2017-01-04 天津航天瑞莱科技有限公司 A kind of train wiper life test apparatus
DE102016216118A1 (en) * 2015-09-16 2017-03-16 Toyota Jidosha Kabushiki Kaisha Object recognition device and stain detection method
US9616851B2 (en) 2011-06-17 2017-04-11 Robert Bosch Gmbh Method and apparatus for recognizing directional structures on a window pane of a vehicle
CN112351920A (en) * 2018-06-12 2021-02-09 株式会社电装 Cleaning device for vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109552255B (en) * 2018-11-19 2020-08-04 厦门理工学院 Wiper blade rubber strip fault detection method and system based on jitter state

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69523667T2 (en) * 1994-06-02 2002-08-01 Saint Gobain Method for measuring the optical quality of a glass sheet
DE10254684A1 (en) * 2002-11-22 2004-06-03 Valeo Schalter Und Sensoren Gmbh System and process to monitor the condition of windshield wiper rubber blades in a motor vehicle, has optical sensor and control unit to detect streaks or marks on the windshield
DE10111450B4 (en) * 2001-03-09 2005-02-10 Schott Ag Method and apparatus for evaluating streaks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69523667T2 (en) * 1994-06-02 2002-08-01 Saint Gobain Method for measuring the optical quality of a glass sheet
DE10111450B4 (en) * 2001-03-09 2005-02-10 Schott Ag Method and apparatus for evaluating streaks
DE10254684A1 (en) * 2002-11-22 2004-06-03 Valeo Schalter Und Sensoren Gmbh System and process to monitor the condition of windshield wiper rubber blades in a motor vehicle, has optical sensor and control unit to detect streaks or marks on the windshield

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9616851B2 (en) 2011-06-17 2017-04-11 Robert Bosch Gmbh Method and apparatus for recognizing directional structures on a window pane of a vehicle
DE102016216118A1 (en) * 2015-09-16 2017-03-16 Toyota Jidosha Kabushiki Kaisha Object recognition device and stain detection method
DE102016216118B4 (en) * 2015-09-16 2017-08-24 Toyota Jidosha Kabushiki Kaisha Object recognition device and stain detection method
US10045002B2 (en) 2015-09-16 2018-08-07 Toyota Jidosha Kabushiki Kaisha Object recognizing apparatus and stain detecting method
CN106289752A (en) * 2016-09-18 2017-01-04 天津航天瑞莱科技有限公司 A kind of train wiper life test apparatus
CN112351920A (en) * 2018-06-12 2021-02-09 株式会社电装 Cleaning device for vehicle

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