DE4224435A1 - 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 - Google Patents

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

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Publication number
DE4224435A1
DE4224435A1 DE19924224435 DE4224435A DE4224435A1 DE 4224435 A1 DE4224435 A1 DE 4224435A1 DE 19924224435 DE19924224435 DE 19924224435 DE 4224435 A DE4224435 A DE 4224435A DE 4224435 A1 DE4224435 A1 DE 4224435A1
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DE
Germany
Prior art keywords
optical
interface
waveguide
screen
optical interface
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Withdrawn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
DE19924224435
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German (de)
Inventor
Peter Prof Dr Gottwald
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19924224435 priority Critical patent/DE4224435A1/en
Priority to HU9301127A priority patent/HU9301127D0/en
Publication of DE4224435A1 publication Critical patent/DE4224435A1/en
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • G01N21/8806—Specially adapted optical and illumination features
    • 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

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The optical interface includes an infrared light source (IRQ) which feeds light via an optical waveguide (LWL/S) into the inside of the interface where it illuminates the surface of the screen. The radiation reflected from the screen is received into another optical waveguide (LWL/E) and fed to a photodetector via a daylight filter (PD). The inside of the interface is filled with a material of suitable optical characteristics. The IR source and the photodetector are arranged in a housing including electrical circuitry. A temperature sensor is provided in thermal contact with the screen, and suppresses a spray device in case of freezing. USE/ADVANTAGE - For detecting wetness and dirt for triggering cleaning equipment, e.g. wipers. Interface is purely optical.

Description

Die Erfindung betrifft ein optisches Interface, dessen Anwendung mit der in Patentanmeldung unter Aktenzeichen P 42 12 916.8 beschriebenen optoelektronischen Einrichtung die Realisation einer vorteilhafteren Variante der Belichtung und Beobachtung einer zu überwachenden Klarsichtscheibe ermöglicht. Bei der beschriebenen Ausgestaltung wird die Klarsichtscheibe z. B. direkt durch das IR-Licht einer Halbleiterdiode belichtet und das reflektierte Licht durch eine IR-sensitive Halbleiterdiode aufgenommen.The invention relates to an optical interface, the Application with the file number in the patent application P 42 12 916.8 described optoelectronic device the realization of a more advantageous variant of the Exposure and observation of one to be monitored Transparent window enables. With the described Design is the transparent panel z. B. directly through exposes the IR light of a semiconductor diode and that reflected light through an IR-sensitive semiconductor diode added.

Bei dieser Ausführungsform müssen die erwähnten optoelektronischen Bauteile definiert und präzise in der direkten Nähe der Klarsichtscheibe montiert werden, wodurch unter Umständen die folgenden Schwierigkeiten auftreten können:In this embodiment, those mentioned optoelectronic components defined and precise in the can be mounted in the immediate vicinity of the transparent panel, which means that the following difficulties may occur can:

  • a) größere Temperaturschwankungen der optoelektronischen Bauteile,a) major temperature fluctuations of the optoelectronic Components,
  • b) schwache elektrische Signale müssen - möglichst ohne Aufnahme von Fremdsignalen - zum elektronischen Netzwerk geführt werden, b) weak electrical signals must - if possible without Recording external signals - to the electronic network be led  
  • c) ein Hybridaufbau (optisch und elektrisch) macht es unter Umständen schwieriger, die interne Scheibenoberfläche sauber und betauungsfrei zu halten. Dieses ist gerade wichtig, wenn die äußere Scheibenoberfläche zu überwachen ist.c) a hybrid structure (optical and electrical) makes it under The internal disc surface may be more difficult keep it clean and free from condensation. This is just important when monitoring the outer pane surface is.

Es ist die Aufgabe der Erfindung, diese nachteiligen Eigenschaften aufzuheben.It is the object of the invention to disadvantage these Abolish properties.

Dieses wird dadurch erreicht, daß der IR-Strahler und die IR-sensitive Diode (Sender- und Empfänger-Diode) am günstigsten in der direkten Nähe des elektronischen Netzwerkes plaziert werden und nur die Lichtsignale mittels Lichtwellenleitern zur Klarsichtscheibe geführt werden. Es ist solcherweise nur ein rein optisches Interface auf die Klarsichtscheibe aufzumontieren.This is achieved in that the IR emitter and IR-sensitive diode (transmitter and receiver diode) on cheapest in the immediate vicinity of the electronic Network are placed and only the light signals by means of Optical fibers are led to the transparent window. It is such a purely optical interface to the To assemble the transparent screen.

In diesem Interface werden die Enden der Lichtwellenleiter eingebettet, wodurch eine definierte optische Anordnung entsteht. Durch Anwendung von geeigneten Kunststoffmaterialien, die für das IR-Licht durchlässig sind, kann unter Umständen dieses Interface völlig kompakt und geschlossen sein. Alternativ kann auch eine Integration in die zu überwachende Scheibe vorgesehen sein, wobei beispielsweise das Innere einstückig mit der zu überwachenden Scheibe verbunden ist.In this interface, the ends of the optical fibers embedded, creating a defined optical arrangement arises. By using suitable Plastic materials that are permeable to IR light under certain circumstances this interface can be completely compact and be closed. Alternatively, integration can also be done be provided in the window to be monitored, wherein for example, the interior in one piece with the monitoring disc is connected.

Das beschriebene Interface kann gegebenenfalls mit einem weiteren Lichtwellenleiter versehen werden, der einen Teil des ausgestrahlten primären Lichts aufnimmt, das im Interesse einer weiter erhöhten Stabilität der Wirkungsweise als Monitorsignal für das elektronische Netzwerk angewendet werden kann. The described interface can optionally be used with a additional optical fibers are provided, the part of the emitted primary light, which in the Interest in a further increased stability of the mode of action used as a monitor signal for the electronic network can be.  

Ebenso ist es möglich, daß durch ein weiteres gleich aufgebautes Interface ein optisches Referenzsignal gebildet wird. In dem Falle muß das eine Interface auf einen Scheibenteil montiert werden, wo die zu überwachende Scheibenoberfläche gegen Verschmutzung geeignet geschützt ist.It is also possible that by another the same built interface formed an optical reference signal becomes. In this case, an interface must be on one Disk part to be mounted where the to be monitored Glass surface suitably protected against dirt is.

Die Erfindung wird anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention is based on one in the drawing illustrated embodiment explained in more detail.

Der mit LWL/S bezeichnete Lichtwellenleiter leitet das Licht der Infrarot-Strahlungsquelle IRQ ins Innere des Interface, wo die Infrarot-Strahlung - entsprechend dem optischen Abschluß des Lichtwellenleiters - ausgestrahlt wird. Somit entsteht eine definierte Belichtung DS der zu überwachenden Scheibenoberfläche. Der reflektierte Strahl RS wird durch einen anderen Lichtwellenleiter LWL/E aufgenommen und über ein Tageslichtfilter TLF zum Photodetektor PD geführt. Weitere Teile eines elektronischen Netzwerkes, wie beispielsweise ein Verstärker V, ein Demodulator D und eine Schaltung zur Auswertung und Steuerung sind in der Patentanmeldung P 42 12 916.8 eingehend beschrieben und deshalb in der Zeichnung nur angedeutet. An Ausgänge WI und SP können der Scheibenwischermotor und der Pumpenmotor für die Scheibenwaschanlage angeschlossen werden.The optical waveguide labeled LWL / S guides the light the infrared radiation source IRQ inside the interface, where the infrared radiation - corresponding to the optical Termination of the optical fiber - is broadcast. Consequently there is a defined exposure DS of those to be monitored Disc surface. The reflected beam RS is through another optical fiber LWL / E added and over a daylight filter TLF led to the photodetector PD. Other parts of an electronic network, such as for example an amplifier V, a demodulator D and a Circuit for evaluation and control are in the Patent application P 42 12 916.8 described in detail and therefore only hinted at in the drawing. At outputs WI and SP can use the wiper motor and the pump motor for the windscreen washer can be connected.

In der Patentanmeldung P 42 12 916.8 ist u. a. vorgesehen, daß die elektronische Schaltung zum Erfassen und Speichern der Parameter der Klarsichtscheibe im gereinigten Zustand zum Zweck der Selbst-Kalibrierung fähig ist. Dazu ist eine programmierbare Referenz R vorgesehen.In the patent application P 42 12 916.8 u. a. intended, that the electronic circuit for detection and storage the parameter of the clear window in the cleaned state capable of self-calibration. There is one programmable reference R is provided.

Das Interface wird hermetisch auf die Klarsichtscheibe geklebt. Das Innere des Interface kann mit Materialien geeigneter optischer Eigenschaften gefüllt werden.The interface is hermetically sealed on the clear glass glued. The inside of the interface can be made with materials suitable optical properties can be filled.

Claims (8)

1. Optisches Interface für die IR-Überwachung von Klarsichtscheiben, dadurch gekennzeichnet, daß das Licht (DS) einer Infrarot-Strahlungsquelle (IRQ) durch Lichtwellenleiter (LWL/S) ins Innere des Interface geleitet und dort zum Belichten der Scheibenoberfläche ausgestrahlt wird, sowie die an der zu überwachenden Scheibe reflektierte Strahlung durch den Eingang eines anderen Lichtwellenleiters (LWL/E) aufgenommen und durch den Lichtwellenleiter (LWL/E) über ein Tageslichtfilter auf einen Photodetektor (PD) geleitet wird.1. Optical interface for IR monitoring of transparent panes, characterized in that the light (DS) from an infrared radiation source (IRQ) is passed through optical fibers (LWL / S) into the interior of the interface and is emitted there for exposing the pane surface, and the radiation reflected on the pane to be monitored is received by the input of another optical waveguide (LWL / E) and passed through the optical waveguide (LWL / E) via a daylight filter to a photodetector (PD). 2. Optisches Interface nach Anspruch 1, dadurch gekennzeichnet, daß das Innere des Interface mit einem Material geeigneter optischer Eigenschaften gefüllt ist.2. Optical interface according to claim 1, characterized characterized in that the interior of the interface with a Material of suitable optical properties is filled. 3. Optisches Interface nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Infrarot-Strahlungsquelle (IRQ) und der Photodetektor (PD) in einem Gehäuse angeordnet sind, das ferner elektrische Schaltungen enthält. 3. Optical interface according to one of the preceding Claims, characterized in that the Infrared radiation source (IRQ) and the photodetector (PD) are arranged in a housing, which is also electrical Contains circuits.   4. Optisches Interface nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Interface mehrere, lichtaufnehmende Lichtwellenleiter zum Bilden eines Referenz- oder Monitorsignals hat.4. Optical interface according to one of the preceding Claims, characterized in that the interface several light-absorbing optical fibers to form one Has reference or monitor signal. 5. Optisches Interface nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Innere einstückig mit der zu überwachenden Scheibe verbunden ist.5. Optical interface according to one of the preceding Claims, characterized in that the interior is in one piece is connected to the pane to be monitored. 6. Optoelektronische Einrichtung für Klarsichtscheiben, die zum Erkennen der Benetzung und Verschmutzung sowie zur automatischen Betätigung von Warn- und/oder Reinigungsanlagen einsetzbar ist, dadurch gekennzeichnet, daß der störende Effekt der Wischblattbewegung und der funktionsrichtige Start der Einrichtung nach einem Reinigungsvorgang solcherweise gesichert sind, daß das aktuelle Signal des optischen Interface während des Reinigungsvorganges durch ein Signal (RS) entsprechend der sauberen Scheibenoberfläche ersetzt wird.6. Optoelectronic device for transparent windows, those for the detection of wetting and contamination as well as for automatic actuation of warning and / or Cleaning systems can be used, characterized in that that the disruptive effect of wiper blade movement and proper start of the facility after a Cleaning process are secured in such a way that current signal of the optical interface during the Cleaning process by a signal (RS) corresponding to the clean disc surface is replaced. 7. Optoelektronische Einrichtung für Klarsichtscheiben, die zum Erkennen der Benetzung und Verschmutzung sowie zur automatischen Betätigung von Warn- und/oder Reinigungsanlagen einsetzbar ist, dadurch gekennzeichnet, daß zusätzlich ein Temperatursensor in wärmeleitendem Kontakt mit der Klarsichtscheibe angeordnet ist, so daß bei Vereisung ein Einschalten der Sprühanlage unterbleibt.7. Optoelectronic device for transparent windows, those for the detection of wetting and contamination as well as for automatic actuation of warning and / or Cleaning systems can be used, characterized in that that in addition a temperature sensor in thermally conductive Contact with the transparent panel is arranged so that at Icing does not switch on the spray system. 8. Optoelektronische Einrichtung nach Anspruch 7, dadurch gekennzeichnet, daß mit Hilfe des Temperatursensors eine Heizeinrichtung einschaltbar ist.8. Optoelectronic device according to claim 7, characterized characterized in that with the help of the temperature sensor Heating device can be switched on.
DE19924224435 1992-07-24 1992-07-24 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 Withdrawn DE4224435A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19924224435 DE4224435A1 (en) 1992-07-24 1992-07-24 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
HU9301127A HU9301127D0 (en) 1992-07-24 1993-04-16 Opto-electronical device for recognizing moistening and/or contamination of transparent plates as well as for automatically operating warning signalling and/or cleaning devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924224435 DE4224435A1 (en) 1992-07-24 1992-07-24 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

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DE4224435A1 true DE4224435A1 (en) 1994-01-27

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DE19924224435 Withdrawn DE4224435A1 (en) 1992-07-24 1992-07-24 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

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HU (1) HU9301127D0 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9301124U1 (en) * 1993-01-28 1993-03-25 Wolle, Rudi, 5442 Mendig Humidity detector as a safety element in connection with windscreen wiper systems of vehicles
DE19749331A1 (en) * 1997-11-07 1999-05-20 Kostal Leopold Gmbh & Co Kg Method of detecting objects on motor vehicle windscreen
WO2000015478A1 (en) * 1998-09-15 2000-03-23 Robert Bosch Gmbh Optical sensor
WO2002051211A2 (en) * 2000-12-20 2002-06-27 Gestion Proche Inc. Lighting device
WO2003098845A2 (en) * 2002-05-16 2003-11-27 Michel Cuvelier Infrared connection device
DE19821123B4 (en) * 1998-04-18 2006-11-23 Volkswagen Ag Switching device for a defrosting device of a vehicle window

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9301124U1 (en) * 1993-01-28 1993-03-25 Wolle, Rudi, 5442 Mendig Humidity detector as a safety element in connection with windscreen wiper systems of vehicles
DE19749331A1 (en) * 1997-11-07 1999-05-20 Kostal Leopold Gmbh & Co Kg Method of detecting objects on motor vehicle windscreen
DE19821123B4 (en) * 1998-04-18 2006-11-23 Volkswagen Ag Switching device for a defrosting device of a vehicle window
WO2000015478A1 (en) * 1998-09-15 2000-03-23 Robert Bosch Gmbh Optical sensor
AU755600B2 (en) * 1998-09-15 2002-12-19 Robert Bosch Gmbh Optical sensor
WO2002051211A2 (en) * 2000-12-20 2002-06-27 Gestion Proche Inc. Lighting device
WO2002051211A3 (en) * 2000-12-20 2002-09-19 Gestion Proche Inc Lighting device
US7557524B2 (en) 2000-12-20 2009-07-07 Gestion Proche Inc. Lighting device
WO2003098845A2 (en) * 2002-05-16 2003-11-27 Michel Cuvelier Infrared connection device
WO2003098845A3 (en) * 2002-05-16 2004-01-15 Michel Cuvelier Infrared connection device

Also Published As

Publication number Publication date
HU9301127D0 (en) 1993-08-30

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