DE4229491A1 - Vehicular windscreen wiper controller with optical moisture detector - responds to encoded light pulse reflection in raindrops with increase in frequency of wiper motor operation - Google Patents
Vehicular windscreen wiper controller with optical moisture detector - responds to encoded light pulse reflection in raindrops with increase in frequency of wiper motor operationInfo
- Publication number
- DE4229491A1 DE4229491A1 DE19924229491 DE4229491A DE4229491A1 DE 4229491 A1 DE4229491 A1 DE 4229491A1 DE 19924229491 DE19924229491 DE 19924229491 DE 4229491 A DE4229491 A DE 4229491A DE 4229491 A1 DE4229491 A1 DE 4229491A1
- Authority
- DE
- Germany
- Prior art keywords
- radiation
- windshield
- sensor
- signal
- pulse
- 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- Withdrawn
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
-
- 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
-
- 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
- B60S1/0837—Optical rain sensor with a particular arrangement of the optical elements
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung zur Steue rung einer Scheibenwischeranlage für Kraftfahrzeuge.The invention relates to a device for taxation tion of a windshield wiper system for motor vehicles.
Stand der Technik ist der Intervallbetrieb der Scheibenwi scher bei geringerer Regenintensität. Wobei die Intervallzei ten fest vorgegeben sind, was zur Folge hat, daß sie häufig zu lang oder zu kurz, also nicht dem Bedarf angepaßt, sind.The state of the art is the interval operation of the Scheibenwi shear with less rain intensity. The interval time ten are fixed, which means that they are frequent are too long or too short, i.e. not adapted to the needs.
Ziel der vorliegenden Erfindung ist es, die Intervallzei ten dem Bedarf anzupassen, das heißt, in Abhängigkeit der Re genintensität die Scheibenwischeranlage in Betrieb zu setzen.The aim of the present invention is the interval time adapt to the needs, that is, depending on the re to put the windshield wiper system into operation.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Vorrichtung einen Sensor, der derart ausgebildet ist, um einen Beschlag der Windschutzscheibe zu erkennen, und eine elektro nische Beschaltung, die geeignete Steuerimpulse zum Betreiben einer Scheibenwischeranlage erzeugt, beinhaltet.This object is achieved in that the Device a sensor which is designed to a Fogging of the windshield can be seen and an electro African circuitry, the appropriate control impulses for operation a windshield wiper system.
Ein Ausführungsbeispiel eines entsprechenden Sensors und dessen elektronischer Beschaltung, ist nachstehend beschrie ben und in den Zeichnungen gezeigt.An embodiment of a corresponding sensor and its electronic wiring is described below ben and shown in the drawings.
Der Sensor 3, den diese Vorrichtung beinhaltet, ist ein op tischer Sensor, der gepulst betrieben wird. Er ist auf der In nenseite der Windschutzscheibe 8 installiert, und besteht aus zwei Strahlungssendern 3.1, und einem Strahlungsempfänger 3.2.The sensor 3 , which this device contains, is an op tical sensor that is operated in a pulsed manner. It is installed on the inside of the windshield 8 and consists of two radiation transmitters 3.1 and one radiation receiver 3.2 .
Die Strahlungssender 3.1 werden mittels Impulsgenerator 2, welcher durch den Wischerschalter 1 in Betrieb gesetzt wird, betrieben. Sie sind optisch leitend, das heißt ohne Luftspalt, in einem Winkel α, und einem Abstand a zueinander, zum Strah lungsempfänger 3.2 hin ausgerichtet, auf der Windschutzscheibe installiert. Wobei der Winkel α so gewählt ist, daß die Strah lungsimpulse durch Totalreflexionen an den Scheibenoberflächen, sich innerhalb dieser ausbreiten. The radiation transmitters 3.1 are operated by means of a pulse generator 2 , which is activated by the wiper switch 1 . They are optically conductive, that is, without an air gap, at an angle α, and at a distance a from one another, oriented towards the radiation receiver 3.2 , installed on the windshield. The angle α is chosen so that the radiation impulses due to total reflections on the disc surfaces spread within them.
Um Störstrahlungsimpulse gering zu halten, sind die Strahlungs sender 3.1 auf der dem Strahlungsempfänger 3.2 zugewandten Seite durch geeignete Mittel 3.3 optisch isoliert. Des weiteren sind auf der Scheibeninnenseite, auf der direkten Linie von der strah lenden Fläche der Strahlungssender 3.1 zum Strahlungsempfänger 3.2, Absorbtionsstreifen 3.4 angebracht. Sie haben mindestens die Breite der strahlenden Fläche der Strahlungssender 3.1, um die Strahlungsanteile, deren Winkel größer als der der Totalreflexion ist, und die dadurch in diesem Bereich aus der Scheibe austreten, zu absorbieren. Die Länge dieser Absorbtionsstreifen ist abhängig von der Dicke der Scheibe und vom Winkel β.In order to keep interference radiation pulses low, the radiation transmitters 3.1 are optically isolated on the side facing the radiation receiver 3.2 by suitable means 3.3 . Furthermore, absorption strips 3.4 are attached to the inside of the pane, on the direct line from the radiating surface of the radiation transmitter 3.1 to the radiation receiver 3.2 . They have at least the width of the radiating surface of the radiation transmitter 3.1 in order to absorb the radiation components, the angle of which is greater than that of the total reflection, and which thereby emerge from the pane in this area. The length of these absorption strips depends on the thickness of the disc and on the angle β.
Der Strahlungsempfänger 3.2 ist in einem Abstand c zu den Strah lungssendern 3.1, und in einem Winkel β zur Sensorfläche a·b ausgerichtet. Er ist durch geeignete Mittel 3.5 vor direkter Son neneinstrahlung geschützt.The radiation receiver 3.2 is aligned at a distance c to the radiation transmitters 3.1 and at an angle β to the sensor surface ab. It is protected from direct sunlight by suitable means 3.5 .
Befinden sich nun Wassertropfen auf der Sensorfläche a·b, so treten dort durch die Veränderung der Scheibenoberfläche, und der dadurch verursachten geänderten Reflexionswinkel, Impulsstrahlungs anteile aus der Scheibe aus. Diese werden in den Tropfen oder Was serpartikel reflektiert, und als Nutzsignal vom Strahlungsempfän ger 3.2 erkannt.If there are drops of water on the sensor surface a · b, the change in the surface of the pane and the change in the reflection angle caused by this result in pulse radiation components emerging from the pane. These are reflected in the drops or water particles, and recognized as a useful signal by the radiation receiver 3.2 .
Der Sensor 3 ist in einem dicht mit der Scheibe verbundenen Ge häuse oder einer vergleichbaren Vorrichtung untergebracht, um ein Verschmutzen der Scheibeninnenseite, was ebenfalls zu einer Nutz signalauskopplung führen würde, zu verhindern.The sensor 3 is housed in a tightly connected to the window Ge housing or a comparable device to prevent contamination of the inside of the window, which would also lead to a useful signal extraction.
Die vom Strahlungsempfänger 3.2 erfaßten Signale werden einer Signalaufbereitung 4 zugeführt. Diese ist so ausgebildet, daß nur diejenigen höherfrequenten Signalanteile verstärkt und der Signal auswertung 5 zugeführt werden, die dem Frequenzspektrum des von den Strahlungssendern 3.1 abgegebenen Signal es entsprechen. The signals detected by the radiation receiver 3.2 are fed to a signal processor 4 . This is designed so that only those higher-frequency signal components are amplified and fed to the signal evaluation 5 which correspond to the frequency spectrum of the signal emitted by the radiation transmitters 3.1 .
Um ein Ansprechen der Signalaufbereitung 4 auf Störimpulse, wie sie durch Blitzlicht, Stroboskopblitzlicht oder anderer Strahlungs quellen mit steilen Anstiegsflanken entstehen können, zu verhindern, können die Strahlungssender 3.1 mit einer bestimmten Impulsfolge, einer Codierung, auf nur die die Signalaufbereitung 4 anspricht und sie als Nutzsignal erkennt, betrieben werden.In order to prevent the signal conditioning 4 from responding to interference pulses, such as those caused by flashing light, strobe flashing or other radiation sources with steep rising edges, the radiation transmitters 3.1 can use a specific pulse sequence, a coding, to which only the signal conditioning 4 responds and as Detects useful signal, operated.
Um der bei größerer Umgebungshelligkeit abnehmenden Empfindlich keit des Strahlungsempfängers 3.2 entgegenzuwirken, ist in der Sig nalaufbereitung 4 eine Kennlinienkorrektur, die sich an der Verän derung des Innenwiderstandes des Strahlungsempfängers orientiert, installiert.In order to counteract the decreasing sensitivity of the radiation receiver 3.2 with greater ambient brightness, a characteristic curve correction, which is based on the change in the internal resistance of the radiation receiver, is installed in the signal processing 4 .
Die Signalauswertung 5 erzeugt aus den eingehenden Impulsen unter Berücksichtigung einer Schaltschwelle einen Steuerimpuls mit einer Mindestimpulsdauer T1, welche so gewählt ist, daß über die Ansteu erung 6 die Wischereinheit 7 sicher in Betrieb gesetzt werden kann. Die Impulsdauer T1 liegt im Bereich von 0,2 Sekunden.The signal evaluation 5 generates a control pulse with a minimum pulse duration T 1 from the incoming pulses, taking into account a switching threshold, which is selected so that the wiper unit 7 can be put into operation safely via the control 6 . The pulse duration T 1 is in the range of 0.2 seconds.
Von der Steuerscheibe der Wischereinheit 7 geht eine Rückmeldung 7.1 über den Betriebszustand der Wischer an die Signalauswertung 5. Da durch das Wischen über die Sensorfläche ebenfalls Nutzsignale erzeugt werden, die das System störend beeinflussen können, wird über diese Rückmeldung der Ausgang der Signalauswertung nur dann geöffnet, wenn sich die Wischer in der Ausgangsstellung befinden. Während des Wischens ist der Ausgang der Signalauswertung gesperrt.From the control disk of the wiper unit 7 , feedback 7.1 about the operating state of the wiper is sent to the signal evaluation 5 . Since wiping over the sensor surface also generates useful signals that can interfere with the system, this feedback only opens the output of the signal evaluation when the wipers are in the initial position. The output of the signal evaluation is blocked during wiping.
Ferner wird über die Rückmeldung 7.1 eine Anhebung der Schalt schwelle für eine Zeitdauer T2 nach Beendigung des Wischvorganges erreicht, in der sich Schlieren, die durch den Wischvorgang her vorgerufen werden, zurückbilden können, ohne den Wischvorgang so fort wieder auszulösen. Diese Schaltschwellenanhebung ist so ge wählt, daß die Nutzsignalanhebung infolge der Schlierenbildung kompensiert wird. Die Zeitdauer T2 liegt erfahrungsgemäß bei et wa 3 Sekunden. Furthermore, an increase in the switching threshold for a period of time T 2 is achieved via the feedback 7.1 after the wiping process has ended, in which streaks that are caused by the wiping process can recede without triggering the wiping process again. This switching threshold increase is selected so that the useful signal increase due to streaking is compensated. Experience has shown that the time period T 2 is approximately 3 seconds.
Die Signalauswertung 5 erzeugt selbsttätig, wenn für eine Zeit dauer T3 vom Sensor kein Beschlag der Windschutzscheibe erkannt wird, einen Steuerimpuls um die Wischereinheit in Betrieb zu setzen. Dies dient dazu, eine vereinzelte Tropfenbildung auf der Windschutzscheibe, außerhalb der Sensorfläche, abzuwischen. In der Praxis hat sich für T3 eine Zeitdauer von bis zu 80 Sekun den als sinnvoll erwiesen.The signal evaluation 5 automatically generates, if the sensor does not detect fogging of the windshield for a period of time T 3 , to set a control pulse around the wiper unit. This is used to wipe out a few drops on the windshield outside the sensor surface. In practice, a time period of up to 80 seconds has proven useful for T 3 .
Claims (17)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924229491 DE4229491A1 (en) | 1992-09-04 | 1992-09-04 | Vehicular windscreen wiper controller with optical moisture detector - responds to encoded light pulse reflection in raindrops with increase in frequency of wiper motor operation |
DE4329188A DE4329188C2 (en) | 1992-09-04 | 1993-08-30 | Optical sensor for controlling a windshield wiper system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924229491 DE4229491A1 (en) | 1992-09-04 | 1992-09-04 | Vehicular windscreen wiper controller with optical moisture detector - responds to encoded light pulse reflection in raindrops with increase in frequency of wiper motor operation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4229491A1 true DE4229491A1 (en) | 1993-01-07 |
Family
ID=6467181
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924229491 Withdrawn DE4229491A1 (en) | 1992-09-04 | 1992-09-04 | Vehicular windscreen wiper controller with optical moisture detector - responds to encoded light pulse reflection in raindrops with increase in frequency of wiper motor operation |
DE4329188A Expired - Fee Related DE4329188C2 (en) | 1992-09-04 | 1993-08-30 | Optical sensor for controlling a windshield wiper system |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4329188A Expired - Fee Related DE4329188C2 (en) | 1992-09-04 | 1993-08-30 | Optical sensor for controlling a windshield wiper system |
Country Status (1)
Country | Link |
---|---|
DE (2) | DE4229491A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995001561A1 (en) * | 1993-07-02 | 1995-01-12 | Gerd Reime | Arrangement for measuring or detecting a change in a retro-reflective component |
DE19608650C1 (en) * | 1996-03-06 | 1997-09-04 | Bosch Gmbh Robert | Device for detecting wetting events on a pane |
US5726547A (en) * | 1993-07-02 | 1998-03-10 | Reime; Gerd | Windshield wiper arrangement including wiper control system |
FR2787406A1 (en) * | 1998-12-21 | 2000-06-23 | Valeo Systemes Dessuyage | Method and device for cleaning automobile windscreens and windows using dynamic optical control |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0911231B1 (en) * | 1997-10-18 | 2003-07-09 | Volkswagen Aktiengesellschaft | Rain sensor |
DE19821123B4 (en) * | 1998-04-18 | 2006-11-23 | Volkswagen Ag | Switching device for a defrosting device of a vehicle window |
DE10352235A1 (en) | 2003-11-08 | 2005-06-09 | Robert Bosch Gmbh | Rain sensor for glass panes, in particular for windscreens of motor vehicles |
EP1899934B1 (en) * | 2005-06-28 | 2013-03-27 | Robert Bosch Gmbh | Sensor arrangement for detecting a liquid on a surface |
CN103186016B (en) * | 2011-12-27 | 2016-04-06 | 深圳中兴力维技术有限公司 | For self-inducting Wiper system and its implementation of video camera |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2354100A1 (en) * | 1973-10-29 | 1975-04-30 | Karl Gerhard | METHOD AND DEVICE FOR THE REGISTRATION AND ANALYSIS OF TRANSLUCENT LIQUIDS AND NON-TRANSLUCENT MATERIALS ON A TRANSPARENT DISC FOR THE AUTOMATIC CONTROL OF DISC WINDOWS, WINDOW WASHER SYSTEMS AND THE LIKE |
DE3218279A1 (en) * | 1982-05-13 | 1983-11-17 | Manfred 1000 Berlin Lau | Automatic interval switch for windscreen wipers |
DE3314770C2 (en) * | 1983-04-23 | 1987-11-12 | Sidler Gmbh & Co, 7400 Tuebingen, De | |
DE3923281A1 (en) * | 1989-07-14 | 1991-01-24 | Bosch Gmbh Robert | DIRT SENSOR FOR VEHICLE WINDOWS |
DE3937920A1 (en) * | 1989-11-15 | 1991-05-16 | Bosch Gmbh Robert | DEVICE FOR AUTOMATICALLY CONTROLLING MOTOR VEHICLE WIPERS |
DE3939938A1 (en) * | 1989-12-02 | 1991-06-06 | Vdo Schindling | DEVICE FOR CONTROLLING A WIPER |
DE4011510C1 (en) * | 1990-04-10 | 1991-07-04 | Robert Bosch Gmbh, 7000 Stuttgart, De |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2316408A1 (en) * | 1973-04-02 | 1974-10-10 | Alfons Endl | DEVICE FOR THE AUTOMATIC CONTROL OF A WINDOW CLEANING SYSTEM |
DE3235590C2 (en) * | 1982-09-25 | 1984-11-22 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Device for the optical detection of foreign bodies |
FR2591167A1 (en) * | 1985-07-11 | 1987-06-12 | Questiaux Stephane | Devices for controlling windscreen wipers and, more generally, detectors of partition transparency |
-
1992
- 1992-09-04 DE DE19924229491 patent/DE4229491A1/en not_active Withdrawn
-
1993
- 1993-08-30 DE DE4329188A patent/DE4329188C2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2354100A1 (en) * | 1973-10-29 | 1975-04-30 | Karl Gerhard | METHOD AND DEVICE FOR THE REGISTRATION AND ANALYSIS OF TRANSLUCENT LIQUIDS AND NON-TRANSLUCENT MATERIALS ON A TRANSPARENT DISC FOR THE AUTOMATIC CONTROL OF DISC WINDOWS, WINDOW WASHER SYSTEMS AND THE LIKE |
DE3218279A1 (en) * | 1982-05-13 | 1983-11-17 | Manfred 1000 Berlin Lau | Automatic interval switch for windscreen wipers |
DE3314770C2 (en) * | 1983-04-23 | 1987-11-12 | Sidler Gmbh & Co, 7400 Tuebingen, De | |
DE3923281A1 (en) * | 1989-07-14 | 1991-01-24 | Bosch Gmbh Robert | DIRT SENSOR FOR VEHICLE WINDOWS |
DE3937920A1 (en) * | 1989-11-15 | 1991-05-16 | Bosch Gmbh Robert | DEVICE FOR AUTOMATICALLY CONTROLLING MOTOR VEHICLE WIPERS |
DE3939938A1 (en) * | 1989-12-02 | 1991-06-06 | Vdo Schindling | DEVICE FOR CONTROLLING A WIPER |
DE4011510C1 (en) * | 1990-04-10 | 1991-07-04 | Robert Bosch Gmbh, 7000 Stuttgart, De |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995001561A1 (en) * | 1993-07-02 | 1995-01-12 | Gerd Reime | Arrangement for measuring or detecting a change in a retro-reflective component |
US5666037A (en) * | 1993-07-02 | 1997-09-09 | Reime; Gerd | Arrangement for measuring or detecting a change in a retro-reflective element |
US5726547A (en) * | 1993-07-02 | 1998-03-10 | Reime; Gerd | Windshield wiper arrangement including wiper control system |
DE19608650C1 (en) * | 1996-03-06 | 1997-09-04 | Bosch Gmbh Robert | Device for detecting wetting events on a pane |
FR2787406A1 (en) * | 1998-12-21 | 2000-06-23 | Valeo Systemes Dessuyage | Method and device for cleaning automobile windscreens and windows using dynamic optical control |
WO2000037292A1 (en) * | 1998-12-21 | 2000-06-29 | Valeo Systemes D'essuyage | Method for controlling a plate surface cleaning by dynamic optical control, and implementing equipment |
Also Published As
Publication number | Publication date |
---|---|
DE4329188C2 (en) | 1996-03-21 |
DE4329188A1 (en) | 1994-03-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3203091C2 (en) | Device for controlling the windshield cleaning system of a motor vehicle | |
EP0785883B1 (en) | Sensor for determining visual range and rain cover | |
DE69835175T2 (en) | System for detecting moisture on the windshield of a vehicle | |
DE4036407C2 (en) | Sensor system | |
EP0312788A2 (en) | Device for measurement of visual range | |
DE19526249A1 (en) | Opto-electronic rain sensor for motor vehicle windscreen | |
DE3715798A1 (en) | Optoelectronic device for detecting the polluting (fouling) of transparent protective panes and initiating the cleaning measures | |
EP0869043A1 (en) | Sensing device for determining the degree of wetting and soiling of a windscreen | |
WO2012107136A1 (en) | Method and device for determining an optical clarity through a car window | |
DE4229491A1 (en) | Vehicular windscreen wiper controller with optical moisture detector - responds to encoded light pulse reflection in raindrops with increase in frequency of wiper motor operation | |
EP0547337B2 (en) | Device for controlling a windscreen wiping system | |
EP1373033B1 (en) | Sensor for detecting filth and/or humidity on the outer side of a glass pane | |
DE102004033944A1 (en) | Operating condition examining device for e.g. optical sensor arrangement, has examination control unit with timer that is programmed such that characteristic reflection of light pulse for preset assembling position in vehicle is evaluated | |
DE4011510C1 (en) | ||
DE4231763C2 (en) | Device for controlling a windshield wiper system | |
DE19545604C3 (en) | Windshield wiper system for rear windows with a moisture sensor integrated in the brake light | |
DE3538553A1 (en) | Arrangement for controlling a window wiping system | |
EP1135285B1 (en) | Device for detecting particles on a windshield | |
DE10100732A1 (en) | Device for automatically cleaning windows | |
DE102005051218B4 (en) | Method and device for avoiding accidents | |
DE19837160C2 (en) | Device for the automatic switching on and off of lighting devices of a motor vehicle | |
EP1182105B1 (en) | Rain sensor, in particular for a vehicle | |
DE3800327A1 (en) | METHOD FOR OPERATING A WIPER AND DEVICE FOR IMPLEMENTING THE METHOD | |
DE4120750C2 (en) | ||
DE4224435A1 (en) | Optical interface for infrared monitoring of transparent screen - uses optical waveguide to couple light from IR source onto screen and has photodetector receiving reflected light fed via second waveguide |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licenses declared | ||
8143 | Withdrawn due to claiming internal priority |