DE4333665A1 - Sensor device - Google Patents

Sensor device

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Publication number
DE4333665A1
DE4333665A1 DE19934333665 DE4333665A DE4333665A1 DE 4333665 A1 DE4333665 A1 DE 4333665A1 DE 19934333665 DE19934333665 DE 19934333665 DE 4333665 A DE4333665 A DE 4333665A DE 4333665 A1 DE4333665 A1 DE 4333665A1
Authority
DE
Germany
Prior art keywords
sensor device
pane
precipitation
radiation
reflection means
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Withdrawn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
DE19934333665
Other languages
German (de)
Inventor
Reinhold Berberich
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Priority to DE19934333665 priority Critical patent/DE4333665A1/en
Publication of DE4333665A1 publication Critical patent/DE4333665A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
    • C03C17/09—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals by deposition from the vapour phase
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
    • G01V8/14—Detecting, e.g. by using light barriers using one transmitter and one receiver using reflectors
    • 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
    • B60S1/0874—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 characterized by the position of the sensor on the windshield
    • B60S1/0877—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 characterized by the position of the sensor on the windshield at least part of the sensor being positioned between layers of the windshield
    • 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
    • B60S1/0874—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 characterized by the position of the sensor on the windshield
    • B60S1/0881—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 characterized by the position of the sensor on the windshield characterized by the attachment means on the windshield

Abstract

The invention relates to a sensor device (2) for detecting the degree of wetting of a transparent pane (plate, disc) (1) which can be wetted by precipitation. Coupled to the pane in the region where it is wetted on its surface (7) not exposed to the precipitation is a beam-guiding element (5) to which there are assigned separately from one another in space a beam transmitter (3) and a beam receiver (4). Beams emitted by the beam transmitter are multiply reflected at the pane by the precipitation located on the pane and at a reflecting medium (12) extending parallel to the pane, and said beams are guided to the beam receiver, which supplies a signal as a function of the quantity of precipitation. It is proposed according to the invention that the pane has two mutually connected pane layers (8, 9), and that the reflecting medium is arranged between the two pane layers. Because of this configuration, the sensor device has a particularly high sensitivity, and in this case is largely independent of tolerance influences of the optical components of the sensor device. <IMAGE>

Description

Die Erfindung betrifft eine Sensoreinrichtung zum Erfassen des Benetzungsgrades einer mit Niederschlag benetzbaren, trans­ parenten Scheibe, wobei an die Scheibe in deren Benetzungs­ bereich auf ihrer dem Niederschlag nicht ausgesetzten Oberfläche ein Strahlenleitkörper angekoppelt ist, dem in räumlicher Trennung voneinander ein Strahlensender und ein Strahlenempfän­ ger zugeordnet ist, wobei vom Strahlensender emitierte Strahlen in Abhängigkeit von dem auf die Scheibe befindlichen Nieder­ schlag an der Scheibe und an einem parallel zur Scheibe sich erstreckenden Reflexionsmittel mehrfach reflektiert und zu dem Strahlenempfänger geleitet werden, der ein von der Nieder­ schlagsmenge abhängiges Signal liefert.The invention relates to a sensor device for detecting the Degree of wetting of a trans parent disk, being on the disk in its wetting area on their surface not exposed to precipitation a radiation guide is coupled, which in spatial Separation from each other a radiation transmitter and a radiation receiver ger is assigned, with rays emitted by the radiation transmitter depending on the low located on the disc hit the disc and one parallel to the disc extending reflection means reflected several times and to the Radiation receivers are directed to the one of the Nieder beat-dependent signal delivers.

Eine derartige Sensoreinrichtung ist aus der DE 40 06 174 C1 bekannt. Dort ist an die, insbesondere aus Glas bestehende, transparente Scheibe der im wesentlichen trapezförmig ausgebil­ dete Strahlenleitkörper angekoppelt. Diesem sind, in räumlicher Trennung voneinander, der Strahlensender und der Strahlenempfän­ ger über jeweils eine an den unter einem Winkel von 90° zuein­ ander stehenden, gleich groß ausgeführten Trapezflächen des Basisteils des Strahlenleitkörpers angebrachte Strahlenlinse derart zugeordnet, daß vom Strahlensender emitierte Strahlen in Abhängigkeit von dem auf der Scheibe befindlichen Niederschlag an der Scheibe und am Reflexionsmittel mehrfach reflektiert und zu dem Strahlenempfänger geleitet werden, wobei der Strahlen­ empfänger ein der Niederschlagsmenge umgekehrt proportionales Signal liefert. Das Reflexionsmittel besteht aus einer eine Totalreflexion gewährleistenden Materialschicht. Eine der beiden Oberflächen der Materialschicht ist metallisch ausgeführt und der Scheibe zugewandt. Insbesondere ist die Materialschicht als Metallfolie oder metallkaschierte Kunststoffolie ausgebildet.Such a sensor device is from DE 40 06 174 C1 known. There is the, in particular made of glass, transparent disc of essentially trapezoidal shape dete beam guide coupled. These are, in spatial Separation from each other, the radiation transmitter and the radiation receiver ger over each one at an angle of 90 ° other standing trapezoidal surfaces of the same size Base part of the radiation guide body attached radiation lens assigned in such a way that beams emitted by the radiation transmitter in Dependence on the precipitation on the disc reflected several times on the pane and on the reflection means and be directed to the radiation receiver, the radiation receiver is inversely proportional to the amount of precipitation  Signal delivers. The reflection medium consists of one Layer of material ensuring total reflection. One of the two Surfaces of the material layer is metallic and facing the disc. In particular, the material layer is as Metal foil or metal-clad plastic film formed.

Nachteilig ist bei der bekannten Sensoreinrichtung, daß dort das Reflexionsmittel entweder auf der der Scheibe abgewandten Seite des Strahlenleitkörpers oder zwischen dem Strahlenleitkör­ per und der Scheibe angeordnet ist. Selbst in dem zuletzt genannten, relativ günstigeren Fall, müssen die Strahlen, um total reflektiert zu werden, die Scheibe über deren gesamte Stärke durchdringen, mit der Folge, daß die Reflexionsabstände des jeweiligen Strahles an der dem Niederschlag ausgesetzten Oberfläche der Scheibe relativ groß und damit die Ansprech­ empfindlichkeit der Sensoreinrichtung relativ gering ist. Andererseits wirken sich Fertigungstoleranzen im Bereich der Scheibe negativ aus, weil diese zu unterschiedlichen Ablenkungen der Strahlen zwischen den Bereichen deren Totalreflexion führen.A disadvantage of the known sensor device is that there the reflection medium either on that facing away from the disc Side of the radiation guide or between the radiation guide per and the disc is arranged. Even in the last one mentioned, relatively more favorable case, the rays have to to be totally reflected, the disk over its entire Penetrate strength, with the result that the reflection distances of the respective beam at the one exposed to precipitation Surface of the disc is relatively large and thus the response sensitivity of the sensor device is relatively low. On the other hand, manufacturing tolerances affect Disk negative because these cause different distractions the rays between the areas cause their total reflection.

Es ist Aufgabe der vorliegenden Erfindung, eine Sensoreinrich­ tung der eingangs genannten Art so weiter zu bilden, daß sie eine besonders gute Ansprechempfindlichkeit aufweist und von Toleranzeinflüssen der optischen Bauteile der Sensoreinrichtung weitgehend unabhängig ist.It is an object of the present invention to provide a sensor device tion of the type mentioned so far that they has a particularly good responsiveness and of Tolerance influences of the optical components of the sensor device is largely independent.

Gelöst wird die Aufgabe bei einer Sensoreinrichtung der genann­ ten Art dadurch, daß die Scheibe zwei miteinander verbundene Scheibenschichten aufweist und das Reflexionsmittel zwischen den beiden Scheibenschichten angeordnet ist.The task is solved with a sensor device called ten kind in that the disc connected two together Has disc layers and the reflection medium between the two disc layers is arranged.

Die erfindungsgemäße Gestaltung der Sensoreinrichtung hat den Vorteil, daß die jeweiligen Strahlen nur über einen Bruchteil der Dicke der Scheibe durch diese dringen müssen, um reflektiert zu werden, da die Reflexion im Bereich der gegenüberliegenden Oberflächen ein und derselben, nämlich der dem Niederschlag ausgesetzten Scheibenschicht erfolgt. Die erfindungsgemäße Gestaltung der Sensoreinrichtung bietet sich insbesondere bei Verbundglasscheiben an. Die beiden Scheibenteile der jeweiligen Verbundglasscheibe sind in aller Regel über eine Folie mit beidseitigem Klebauftrag miteinander verbunden.The inventive design of the sensor device has the Advantage that the respective rays are only a fraction the thickness of the disc must penetrate through this in order to be reflected to be because the reflection is in the area of the opposite Surfaces of one and the same, namely that of precipitation exposed disc layer takes place. The invention  Design of the sensor device is particularly useful for Laminated glass panes. The two disc parts of each Laminated glass panes are usually covered with a film bonded on both sides.

Die erfindungsgemäße Gestaltung der Sensoreinrichtung ermöglicht es, die Strahlen in dem dem Strahlenleitkörper zugeordneten Oberflächenbereich der Scheibe, vorliegend im Bereich des dem Niederschlag ausgesetzten Scheibenteiles, wesentlich öfter zu reflektieren als bei der bekannten Sensoreinrichtung, was die Ansprechempfindlichkeit der Sensoreinrichtung erhöht, da die Totalreflexionsabstände der Strahlen entsprechend der Dicke der interessierenden Scheibenschicht wesentlich geringer sind. Grundsätzlich kann die erfindungsgemäße Sensoreinrichtung damit wesentlich kompakter bauen.The inventive design of the sensor device enables it, the rays in the associated with the radiation guide Surface area of the disc, in the present case in the area of the Disc part exposed to precipitation, much more often reflect than in the known sensor device, what the Response sensitivity of the sensor device increases because the Total reflection distances of the beams according to the thickness of the pane of interest are much smaller. Basically, the sensor device according to the invention can thus build much more compact.

Gemäß einer besonderen Ausführungsform der Erfindung ist das Reflexionsmittel zwischen der Folie und derjenigen Scheiben­ schicht angeordnet, die dem Niederschlag ausgesetzt ist. Die Reflexion erfolgt damit nur innerhalb dieser Scheibenschicht. Das Reflexionsmittel kann auf unterschiedliche Art und Weise ausgebildet sein. Zweckmäßig ist es als Metallkörper beschaffen, insbesondere als Metallplatte oder noch dünner als Metallfolie. Das folienartige Reflexionsmittel kann beispielsweise mit der zugeordneten Scheibenschicht verklebt oder auf diese aufgedampft sein. Schließlich ist es auch denkbar, das Reflexionsmittel in eine Vertiefung der dem Niederschlag ausgesetzten Scheiben­ schicht einzulegen.According to a particular embodiment of the invention, this is Reflective agent between the film and those panes layer that is exposed to precipitation. The Reflection therefore only takes place within this disc layer. The reflecting agent can be used in different ways be trained. It is useful as a metal body, especially as a metal plate or even thinner than a metal foil. The film-like reflection means can, for example, with the associated disc layer glued or evaporated onto this his. Finally, it is also conceivable that the reflection means in a deepening of the slices exposed to precipitation layer inlay.

Die erfindungsgemäße Sensoreinrichtung findet insbesondere bei Kraftfahrzeugen Verwendung. In diesem Zusammenhang sieht eine besondere Gestaltung vor, daß die Sensoreinrichtung in einem Gehäuse angeordnet ist, dessen der Scheibe abgewandte Seite dem Befestigen eines Rückspiegels im Inneren des Kraftfahrzeuges dient. Die Sensoreinrichtung ist an exponierter Stelle der Scheibe angeordnet, somit dort, wo Niederschlag auf die Scheibe auftritt, andererseits dient die Sensoreinrichtung der Halterung des Rückspiegels und wird, vom Kraftfahrzeuginnenraum gesehen, vom Rückspiegel abgedeckt, so daß die Sensoreinrichtung optisch nicht stört.The sensor device according to the invention is particularly found in Motor vehicles use. In this context one sees special design that the sensor device in one Housing is arranged, the side facing away from the disc Attaching a rear-view mirror inside the motor vehicle serves. The sensor device is in an exposed position Disc arranged, where there is precipitation on the disc occurs, on the other hand, the sensor device of the holder  of the rear-view mirror and is seen from the motor vehicle interior covered by the rearview mirror, so that the sensor device optically does not bother.

In der Zeichnung der einzigen Figur ist die Erfindung an einer Ausführungsform beispielsweise dargestellt, ohne auf diese beschränkt zu sein.In the drawing of the single figure, the invention is at one Embodiment shown, for example, without this to be limited.

Die Figur zeigt eine Scheibe 1 und die an dieser angebrachte Sensoreinrichtung 2 in einem Schnitt, wobei die Scheibe 1 nur im Bereich der Sensoreinrichtung 1 verdeutlicht ist.The figure shows a disk 1 and the sensor device 2 attached to it in a section, the disk 1 being illustrated only in the area of the sensor device 1 .

Wie aus der Zeichnung hervorgeht, besteht die Sensoreinrichtung 2 im wesentlichen aus einem einerseits einem Strahlensender 3 und andererseits einem Strahlenempfänger 4 zugeordneten Strah­ lenleitkörper 5, der mittels einer Schicht 6 aus optischem Kitt auf der dem Niederschlag nicht ausgesetzten Oberfläche 7 der Scheibe 1 befestigt ist. Bei der Scheibe 1 handelt es sich um eine Verbundglasscheibe mit einer äußeren Scheibenschicht 8 und einer inneren Scheibenschicht 9, wobei diese beiden Scheiben­ schichten 8 und 9 mittels einer Folie 10, die einen beidseitigen Klebauftrag aufweist, verbunden sind. Mit der Bezugsziffer 11 ist diejenige Oberfläche bezeichnet, die mittels Niederschlag benetzbar ist. Zwischen der Folie 10 und der äußeren Scheiben­ schicht 8 ist ein Reflexionsmittel 12 in Art einer Metallplatte angeordnet, wobei das Reflexionsmittel 12 in eine Vertiefung der Scheibenschicht 8 auf der der Oberfläche 11 abgewandten Seite eingelegt ist, derart, daß die der Oberfläche 11 abgewandte Ebene des plattenförmigen Reflexionsmittels 12 eine Ebene mit der der Folie 10 zugewandten Oberfläche 13 der Scheibenschicht 8 bildet.As can be seen from the drawing, the sensor device 2 consists essentially of a beam transmitter 3 on the one hand and a radiation receiver 4 assigned to the beam guide 5 which is attached to the surface 7 of the pane 1 which is not exposed to precipitation by means of a layer 6 of optical cement. The pane 1 is a laminated glass pane with an outer pane layer 8 and an inner pane layer 9 , these two pane layers 8 and 9 being connected by means of a film 10 which has an adhesive application on both sides. The reference number 11 denotes that surface which can be wetted by precipitation. Between the film 10 and the outer pane layer 8 , a reflecting means 12 is arranged in the manner of a metal plate, the reflecting means 12 being inserted into a recess in the pane layer 8 on the side facing away from the surface 11 , such that the plane 11 facing away from the surface 11 plate-shaped reflection means 12 forms a plane with the surface 13 of the pane layer 8 facing the film 10 .

Bei der Scheibe 1 handelt es sich insbesondere um die Wind­ schutzscheibe eines Kraftfahrzeuges, an der die in einem Gehäuse 14 angeordnete Sensoreinrichtung 2 an exponierter, das heißt, die Sicht nicht beeinträchtigender, jedoch für die Entfernung des Niederschlags prädestinierter Stelle befestigt ist. Der Strahlenleitkörper 5 besteht dabei aus einem prinzipiell trapezförmig ausgebildeten Basisteil 15 an dessen beiden, sich gegenüberliegenden Trapezflächen 16 und 17 einteilig mit dem Strahlenleitkörper 5 jeweils eine Strahlenlinse 18 und 19 vorhanden ist. Es ist aber auch möglich, den Strahlenleitkörper 5 aus zwei getrennten Bauteilen auszubilden, die jeweils eine der Strahlenlinsen 18 und 19 aufweisen. Die beiden gleichgroß ausgebildeten Trapezflächen 16 und 17 sind so am Basisteil 15 angeordnet, daß die Mittellinien der beiden Strahlenlinsen 18 und 19 um einen Winkel α von 90° gegeneinander versetzt sind.The disk 1 is, in particular, the windshield of a motor vehicle, to which the sensor device 2 arranged in a housing 14 is fastened to an exposed, that is to say not impairing the view, but which is predestined for the removal of the precipitation. The radiation guide body 5 consists of a basically trapezoidal base part 15, on each of the two opposing trapezoid surfaces 16 and 17, one beam lens 18 and 19 is provided in one piece with the radiation guide body 5 . However, it is also possible to form the radiation guide body 5 from two separate components, each of which has one of the radiation lenses 18 and 19 . The two trapezoidal surfaces 16 and 17 of equal size are arranged on the base part 15 such that the center lines of the two beam lenses 18 and 19 are offset from one another by an angle α of 90 °.

Wie der Figur zu entnehmen ist, wird der jeweilige Strahl vom Strahlensender 3 in die Strahlenlinse 18 und damit in den Strahlenleitkörper 5 eingespeist und durchdringt die Schicht 6 des optischen Koppelmediums, die innere Scheibenschicht 9 und die Folie 10, so daß der Strahl in die äußere Scheibenschicht 8 gelangt und an der äußeren Oberfläche 11 dieser Scheibenschicht 8 in Richtung des Reflexionsmittels 12 reflektiert wird. Nach mehrmaliger Reflexion zwischen Reflexionsmittel 12 und Ober­ fläche 11 der Scheibenschicht 8 wird der Strahl durch die vorstehend genannten Komponenten zum Strahlenempfänger 4 reflektiert und erzeugt dort ein Signal. Befindet sich im Strahlengang, das heißt, auf der Fläche 11 der Scheibenschicht 8 Niederschlag, führt dies dazu, daß ein der Niederschlagsmenge umgekehrt proportionales Signal geliefert wird.As can be seen from the figure, the respective beam from the radiation transmitter 3 is fed into the radiation lens 18 and thus into the radiation guide body 5 and penetrates the layer 6 of the optical coupling medium, the inner disc layer 9 and the film 10 , so that the beam into the outer Disc layer 8 arrives and is reflected on the outer surface 11 of this disc layer 8 in the direction of the reflection means 12 . After repeated reflection between the reflection means 12 and the upper surface 11 of the disc layer 8 , the beam is reflected by the above-mentioned components to the radiation receiver 4 and generates a signal there. If there is precipitation in the beam path, that is to say on the surface 11 of the pane layer 8 , this leads to the fact that a signal which is inversely proportional to the amount of precipitation is supplied.

An der der Scheibe abgewandten Stirnplatte 20 des Gehäuses 14 kann eine Halterung für einen Rückspiegel des Kraftfahrzeuges befestigt sein.A holder for a rear-view mirror of the motor vehicle can be fastened to the end plate 20 of the housing 14 facing away from the pane.

Claims (11)

1. Sensoreinrichtung zum Erfassen des Benetzungsgrades einer mit Niederschlag benetzbaren, transparenten Scheibe, wobei an die Scheibe in deren Benetzungsbereich auf ihrer dem Niederschlag nicht ausgesetzten Oberfläche ein Strahlen­ leitkörper angekoppelt ist, dem in räumlicher Trennung voneinander ein Strahlensender und ein Strahlenempfänger angeordnet ist, wobei vom Strahlensender emitierte Strahlen in Abhängigkeit von dem auf die Scheibe befindlichen Niederschlag an der Scheibe und an einem parallel zur Scheibe sich erstreckenden Reflexionsmittel mehrfach reflektiert und zu dem Strahlenempfänger geleitet werden, der ein von der Niederschlagsmenge abhängiges Signal liefert, dadurch gekennzeichnet, daß die Scheibe (1) zwei miteinander verbundene Scheibenschichten (8, 9) aufweist und das Reflexionsmittel (12) zwischen den beiden Scheiben­ schichten (9) angeordnet ist.1. Sensor device for detecting the degree of wetting of a transparent pane that can be wetted with precipitation, a radiation guide body being coupled to the pane in its wetting area on its surface not exposed to the precipitation, with a radiation transmitter and a radiation receiver being arranged in spatial separation from one another Radiation transmitter emitted rays are reflected several times depending on the precipitation on the disk and on a reflection means extending parallel to the disk and directed to the radiation receiver, which delivers a signal dependent on the amount of precipitation, characterized in that the disk ( 1 ) has two interconnected disc layers ( 8 , 9 ) and the reflection means ( 12 ) between the two disc layers ( 9 ) is arranged. 2. Sensoreinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Scheibe (1) als Verbundglasscheibe ausgebildet ist.2. Sensor device according to claim 1, characterized in that the pane ( 1 ) is designed as a laminated glass pane. 3. Sensoreinrichtung nach Anspruch 1 oder 2, dadurch gekenn­ zeichnet, daß die beiden Scheibenschichten (8, 9) Über eine Folie (10), die beidseitig einen Klebeauftrag aufweist, verbunden sind.3. Sensor device according to claim 1 or 2, characterized in that the two disc layers ( 8 , 9 ) via a film ( 10 ) having an adhesive application on both sides are connected. 4. Sensoreinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Reflexionsmittel (12) zwischen der Folie (10) und derjenigen Scheibenschicht (8), die dem Niederschlag ausgesetzt ist, angeordnet ist.4. Sensor device according to claim 3, characterized in that the reflection means ( 12 ) between the film ( 10 ) and that pane layer ( 8 ), which is exposed to the precipitation, is arranged. 5. Sensoreinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Folie einen metallisierten, das Reflexionsmittel bildenden Bereich aufweist. 5. Sensor device according to one of the preceding claims, characterized in that the foil has a metallized has the area forming the reflection means.   6. Sensoreinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Reflexionsmittel (12) als Metall­ körper ausgebildet ist, insbesondere als Metallplatte oder Metallfolie.6. Sensor device according to one of claims 1 to 4, characterized in that the reflection means ( 12 ) is designed as a metal body, in particular as a metal plate or metal foil. 7. Sensoreinrichtung nach Anspruch 6, dadurch gekennzeichnet, daß das Reflexionsmittel (12) in eine Vertiefung derjenigen Scheibenschicht (8), die dem Niederschlag ausgesetzt ist, eingelegt ist.7. Sensor device according to claim 6, characterized in that the reflection means ( 12 ) is inserted into a recess in that pane layer ( 8 ) which is exposed to the precipitation. 8. Sensoreinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die der inneren Scheibenschicht zugewandte Oberfläche der äußeren Scheibenschicht einen metallisierten, das Reflexionsmittel bildenden Bereich aufweist.8. Sensor device according to one of claims 1 to 4, characterized characterized that the inner disc layer facing surface of the outer pane layer metallized area forming the reflection means having. 9. Sensoreinrichtung nach einem der Ansprüche 5 oder 8, dadurch gekennzeichnet, daß der metallische Bereich eine metallbedampfte bzw. metallbesputterte Schicht ist.9. Sensor device according to one of claims 5 or 8, characterized in that the metallic area is a metal-vapor-coated or metal-sputtered layer. 10. Sensoreinrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Strahlensender (3) und der Strah­ lenempfänger (4) über jeweils eine an den unter einem Winkel von 90° zueinander stehenden, gleichgroß ausgeführ­ ten Trapezflächen (17, 16) des Basisteiles (15) des Strahlenleitkörpers (5) angebrachte Strahlenlinsen (18, 19) einander zugeordnet sind.10. Sensor device according to one of claims 1 to 9, characterized in that the beam transmitter ( 3 ) and the beam lenempfänger ( 4 ) each have a at the at an angle of 90 ° to each other, equally sized th trapezoidal surfaces ( 17 , 16 ) of the base part ( 15 ) of the radiation guide body ( 5 ) attached radiation lenses ( 18 , 19 ) are assigned to each other. 11. Sensoreinrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Sensoreinrichtung (2) in einem Gehäuse (14) angeordnet ist, dessen der Scheibe (1) abgewandte Seite (20) dem Befestigen eines im Inneren des Kraftfahrzeuges angeordneten Rückspiegels dient.11. Sensor device according to one of claims 1 to 10, characterized in that the sensor device ( 2 ) is arranged in a housing ( 14 ), the side of which ( 20 ) facing away from the pane ( 1 ) is used to fasten a rearview mirror arranged in the interior of the motor vehicle .
DE19934333665 1993-10-02 1993-10-02 Sensor device Withdrawn DE4333665A1 (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631059A1 (en) * 1996-08-01 1998-02-05 Teves Gmbh Alfred Optical sensor with self-monitoring of transparency of light aperture
DE19725287A1 (en) * 1997-06-14 1998-12-17 Itt Mfg Enterprises Inc Rain sensor with bonded sensor chips
DE19742093A1 (en) * 1997-09-24 1999-03-25 Kostal Leopold Gmbh & Co Kg Photoelectric sensor array
EP0911231A2 (en) * 1997-10-18 1999-04-28 Volkswagen Aktiengesellschaft Rain sensor
DE19749331A1 (en) * 1997-11-07 1999-05-20 Kostal Leopold Gmbh & Co Kg Method of detecting objects on motor vehicle windscreen
DE19805000A1 (en) * 1998-02-07 1999-08-12 Opel Adam Ag Optical sensor device for motor vehicles
EP0941900A2 (en) * 1998-03-10 1999-09-15 Nippon Sheet Glass Co., Ltd. Water detection sensor
EP0947402A2 (en) * 1998-04-03 1999-10-06 Nippon Sheet Glass Co., Ltd. Water detection sensor
EP1053558A1 (en) * 1997-10-16 2000-11-22 Libbey-Owens-Ford Co. Compact moisture sensor with efficient, high obliquity optics
WO2000069692A1 (en) * 1999-05-18 2000-11-23 Valeo Climatisation Device for detecting a parameter associated with the state of a vehicle, especially an automobile
EP0997360A3 (en) * 1998-10-29 2003-05-07 Kelsey-Hayes Company Rain sensor operation on solar reflective glass
DE19830120B4 (en) * 1997-07-09 2006-07-06 Leopold Kostal Gmbh & Co. Kg Optoelectronic sensor device

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631059A1 (en) * 1996-08-01 1998-02-05 Teves Gmbh Alfred Optical sensor with self-monitoring of transparency of light aperture
DE19725287A1 (en) * 1997-06-14 1998-12-17 Itt Mfg Enterprises Inc Rain sensor with bonded sensor chips
US6526820B1 (en) 1997-06-14 2003-03-04 Valeo Auto-Electric Wischer Und Motoren Gmbh Rain sensor with bonded chips
DE19830120B4 (en) * 1997-07-09 2006-07-06 Leopold Kostal Gmbh & Co. Kg Optoelectronic sensor device
DE19742093A1 (en) * 1997-09-24 1999-03-25 Kostal Leopold Gmbh & Co Kg Photoelectric sensor array
US6452148B1 (en) 1997-09-24 2002-09-17 Leopold Kostal Gmbh & Co. Optoelectronic monitoring device for a motor vehicle
EP1641013A1 (en) * 1997-10-16 2006-03-29 Libbey-Owens-Ford Co. Compact moisture sensor with efficient, high obliquity optics
EP1053558A4 (en) * 1997-10-16 2004-12-15 Libbey Owens Ford Co Compact moisture sensor with efficient, high obliquity optics
EP1053558A1 (en) * 1997-10-16 2000-11-22 Libbey-Owens-Ford Co. Compact moisture sensor with efficient, high obliquity optics
EP0911231A3 (en) * 1997-10-18 2001-09-26 Volkswagen Aktiengesellschaft Rain sensor
EP0911231A2 (en) * 1997-10-18 1999-04-28 Volkswagen Aktiengesellschaft Rain sensor
DE19749331A1 (en) * 1997-11-07 1999-05-20 Kostal Leopold Gmbh & Co Kg Method of detecting objects on motor vehicle windscreen
DE19805000A1 (en) * 1998-02-07 1999-08-12 Opel Adam Ag Optical sensor device for motor vehicles
EP0934851A3 (en) * 1998-02-07 2002-07-10 Adam Opel Ag Optical sensor for a motor vehicle
EP0941900A3 (en) * 1998-03-10 2001-07-18 Nippon Sheet Glass Co., Ltd. Water detection sensor
EP0941900A2 (en) * 1998-03-10 1999-09-15 Nippon Sheet Glass Co., Ltd. Water detection sensor
US6153995A (en) * 1998-04-03 2000-11-28 Nippon Sheet Glass Co., Ltd. Water drop detection sensor
EP0947402A3 (en) * 1998-04-03 1999-12-01 Nippon Sheet Glass Co., Ltd. Water detection sensor
EP0947402A2 (en) * 1998-04-03 1999-10-06 Nippon Sheet Glass Co., Ltd. Water detection sensor
EP0997360A3 (en) * 1998-10-29 2003-05-07 Kelsey-Hayes Company Rain sensor operation on solar reflective glass
WO2000069692A1 (en) * 1999-05-18 2000-11-23 Valeo Climatisation Device for detecting a parameter associated with the state of a vehicle, especially an automobile
US6768099B1 (en) 1999-05-18 2004-07-27 Valeo Climatisation Device for detecting a parameter associated with the state of a vehicle, especially an automobile

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