EP1812785A1 - Detecteur optique pour detecter de l'humidite sur un pare-brise d'un vehicule a moteur - Google Patents

Detecteur optique pour detecter de l'humidite sur un pare-brise d'un vehicule a moteur

Info

Publication number
EP1812785A1
EP1812785A1 EP05797247A EP05797247A EP1812785A1 EP 1812785 A1 EP1812785 A1 EP 1812785A1 EP 05797247 A EP05797247 A EP 05797247A EP 05797247 A EP05797247 A EP 05797247A EP 1812785 A1 EP1812785 A1 EP 1812785A1
Authority
EP
European Patent Office
Prior art keywords
transmitter
receiver
transparent
waveguide
light
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Withdrawn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
EP05797247A
Other languages
German (de)
English (en)
Inventor
Frank Wolf
Vladislav Matusevich
Manfred Tettweiler
Richard Kowarschik
Karim Haroud
Andreas Pack
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1812785A1 publication Critical patent/EP1812785A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
    • 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
    • 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
    • B32B17/1055—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 resin layer, i.e. interlayer
    • B32B17/10761—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 resin layer, i.e. interlayer containing vinyl acetal
    • 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
    • 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
    • B60S1/084—Optical rain sensor including a hologram
    • 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
    • G01N21/55—Specular reflectivity
    • G01N21/552—Attenuated total reflection
    • 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

Definitions

  • Optical sensor for detecting moisture on a window of a motor vehicle
  • the invention relates to an optical sensor for detecting moisture on a window of a motor vehicle, having a radiation-emitting transmitter, a receiver and at least one light-conducting element, wherein the radiation to a in the light path between transmitter and receiver ange ⁇ arranged detection area on the Disk is steerable.
  • optical sensor is known, for example, from DE 102 29 239 A1.
  • Optical sensors of this type are known in many variations and are used in motor vehicles as so-called rain sensors, which can be used in particular for the (automatic) control of windshield wiper systems.
  • the light-conducting elements may be formed, for example, as a coupling element, retroreflector or as a light-guiding element, in particular waveguides.
  • the known sensors typically, but not universally, operate on the principle of total reflection.
  • This detection method which is predominantly used in today's rain sensors, is initially based on the fact that light in a waveguide can propagate by total reflection, as is known, since the reflection medium, ie the cladding or the surrounding waveguide, has a lower refractive index than the waveguide core having.
  • As the sides of the disc thereby reflect that by means of a coupling agent, for example a prism, under ei ⁇ nem sufficiently large angle (> 42 °) in the waveguide a
  • the total light brought is large, since the light beam angle at dry interface is large enough to prevent splitting into a reflective and a transmitting light beam.
  • the boundary of the medium changed from 42 ° to 60 ° for the medium transition changed from 42 ° to 60 °, so that now a large proportion of the - with respect to Function as a rain sensor with an angle between 42 ° and 60 ° coupled light emerges over this drop.
  • the moisture-dependent decreasing photoconductivity of the channel is measured at the decoupling point (again prism or the like) by means of photodiodes or phototransistors.
  • the non-transparent parts of the rain sensor may not disturb the driver's field of vision and on the other hand the detection range of the sensor must be mounted in a region of the windscreen which is cleaned by the windshield wiper system, sensor designs have now been developed in which an additional, on or waveguide formed in the disk for Ü bridging the distance between the detection area and the remaining parts of the rain sensor, or for bridging the non-wiper cleaned areas of the windshield, is used.
  • a rain sensor in which the additional waveguide is formed in an intermediate layer of a laminated glass pane. At a suitable point, the light is coupled out of the waveguide to the outside of the pane, where it is totally reflected and coupled back into the internal waveguide, so that moisture present in the detection area on the outside of the pane is present in the desired manner Weakening of the light beam by partial decoupling leads, which can then be evaluated in a known manner. It is also known to form a guide element and / or the decoupling element as a hologram, whereby these photoconductive elements are transparent to the driver of the motor vehicle and thus do not limit his field of vision. The present invention is based on the object, the generic sensor so educate that - without impairing the field of view of the driver - in particular a greater range of variation of the sensor shape and the Sensorauf- construction is given.
  • the transmitter and / or the receiver are transparent and integrated into the disc.
  • the transparent optical elements can be - without affecting the driver's perspective - implement differently constructed sensor designs in which the external expenses are significantly reduced.
  • the sensors according to the invention can be used for the detection of
  • the transparent optical elements can in particular be integrated into the adhesive intermediate layer of a laminated glass pane.
  • the above-described methods of total reflection and / or scattered radiation detection can be used as detection principles.
  • the transmitter and the receiver are arranged side by side on the disc and a light-conducting element is designed as a collimating optics to direct the radiation from the transmitter, via the detection area, into the receiver.
  • This sensor can be implanted with great variability and little effort with respect to its parts arranged inside and outside the disk.
  • the transmitter and the receiver are designed as a transparent transmitter / receiver system and arranged one above the other in the wiper ⁇ cleaned wiper field of the disc, the transmitter between the receiver and each provided for detection side of the disc is.
  • the light-guiding element is designed as a collimating optic in order to direct the radiation from the transmitter, via the detection area and through the transparent transmitter, into the receiver.
  • either the outside or the inside of the pane can be provided for detection.
  • a further advantageous variant is a Two-sided detection in a simple manner possible in that in addition to the first transparent optical elements (transmitter, receiver, light-conducting elements), which are provided for Detekti ⁇ on a first side of the disc, second transparent optical elements are integrated into the disc, the Detection are provided on a second, opposite side of the disc.
  • the first and second optical elements are mirror-symmetrical with respect to a plane extending parallel to the detection sides of the disk.
  • embodiments with an additional waveguide are also possible within the scope of this proposed solution.
  • the light-conducting element is formed on a part of the light path between the transmitter and receiver as a waveguide integrated into the disc, and that the waveguide has a coupling element to couple the coming of the detection of the disc radiation in the Wel ⁇ lenleiter.
  • a further light-conducting element can be provided in order to direct the radiation directly from the transmitter to the detection area, without a waveguide, the further light-guiding element being designed as a collimating optic.
  • the waveguide has a glass film as the core and a cladding layer made of Teflon, and if the waveguide is arranged in or on the adhesive interlayer of a laminated glass pane.
  • the transparent optical elements can also be integrated directly in or on the PVB interlayer or at another suitable location in the pane.
  • FIGS. 5 to 10 in the same representation, different variants of the sensor according to the invention with additional waveguide,
  • FIG. 11 shows a variant of the embodiments without and FIG. 12 shows a variant of the embodiments with additional waveguide.
  • FIGS. 1 to 12 a detail of a motor vehicle known per se is shown.
  • PVB polyvinyl butyral
  • the light source and the transmitter 1 and the receiver 2 of the sensor are each made transparent and integrated side by side in the PVB layer 5.
  • two light-guiding elements, each designed as a collimating optic 3, which are assigned to the transmitter 1 and the receiver 2 in each case or are arranged in their vicinity, can be seen, such that the radiation 11 from the transmitter 1 through the divider 4 passes through to the Detection region 12 is guided on the outer side 6 of the disc, um ⁇ deflected at the detection area 12 and further, again by the dividing disk 4 through, is directed into the receiver 2.
  • the collimating optics 3 can each consist of one or more optical elements with reflective, refractive or diffractive properties.
  • the collimating optics 3 modifies or deflects the wave front of the radiation 11 in the usual way in such a way that the radiation 11 is optimally detected at the detection area 12. that can.
  • detection methods the weakening of the radiation 11 by disturbing the given at dry interface 6 total reflection, scattered radiation detection or a combined method in question.
  • the radiation 11 can also be directed by the collimating optics 3 and / or other measures here, as in the following exemplary embodiments, in such a way that it interacts with the detection area 12 several times.
  • the transmitter 1 and the receiver 2 can, on the one hand, on the one hand, due to their transparency, be arranged at any point of the pane provided for the detection area 12 without disturbing the field of vision of the driver.
  • the sensor should not be triggered by moisture or contaminants, which are typically present outside the wiping field of the windscreen wipers under appropriate conditions;
  • the detection area 12 or the transmitter 1 and the receiver 2 can and should therefore be arranged in the region of the wiper-cleaned wiping field of the disk.
  • the transmitter 1 and the receiver 2 can typically be arranged at a distance of only a few millimeters.
  • the electrical connection with the evaluation electronics or the power supply takes place with only a few micrometers thick, practically invisible wires, which lead from the transmitter 1 or receiver 2 to the periphery of the pane and optionally further to the wafer-external, further sensor parts.
  • FIG. 3 shows an exemplary embodiment in which the transmitter 1 and the receiver 2 are arranged one above the other as a layer structure, so that the light beam 11 emitted by the transmitter 1 and relayed via a collimating optic 3 is reflected back or scattered back at the interface 6, passes through the transparent transmitter layer 1 and is trapped in the underlying transparent receiver layer 2.
  • FIGS. 1 and 3 each have an embodiment in FIGS. 2 and 4, in which the detection is not limited to a selectable side of the pane, but is simultaneously possible on the outside 6 and the inside 7 of the pane.
  • a compact design which is favorable in terms of manufacture can be achieved in that the first and second optical elements are designed essentially mirror-symmetrically with respect to a plane extending parallel to the detection sides of the disk.
  • FIGS. 5 to 10 show exemplary embodiments in which the radiation 11 is conducted on a substantial part of the light path between the transmitter 1 and the receiver 2 in a waveguide 8 which is arranged in or on the PVB layer 5.
  • Figures 5 to 7 relate to variants in which the transmitter 1 and the receiver 2 are both transparent, while the Figures 8 to 10 refer to Vari ⁇ antennas with a non-transparent receiver 2.
  • the receiver may also be transparent and the transmitter nontransparent.
  • the waveguide 8 makes it possible to position the transparent transmitter / receivers 1 and 2, or only the transparent transmitter 1, either in the region or outside the region of the wiper-cleaned wiping field of the wafer since ultimately only the detection means rich 12 must be positioned in the wiping field.
  • the radiation 11 initially propagates in the first section of the waveguide 8 until it is decoupled to the detection area 12 by means of a decoupling element 9 at a decoupling point selected with regard to the desired detection area 12.
  • the light beam 11 is reflected at the glass-air interface or, when the outside 6 is wetted with moisture, at the glass-water interface or scattered on the water droplets that may be present and is deflected in such a way
  • the second section reaches the waveguide 8, which is formed at the corresponding Ein ⁇ coupling point by means of a coupling element 9 such aus ⁇ that the radiation 11 is forwarded in the second section of the waveguide 8.
  • the coupling elements 9 may be formed, for example, as a holographic grid. As shown in FIG. 6, the coupling elements 9 can also be 'doubled', in particular in the indicated mirror-symmetrical manner, in order to enable double-sided detection on the pane.
  • the transmitter 1 and the receiver 2 can, as can be seen in particular in FIGS. 5 and 6, be integrated directly into the waveguide 8 or into the two waveguide sections. You can, however, cf. the two-sided detection according to FIG. 7 can also be arranged outside the waveguide 8, whereby, as shown, in each case a collimating optical system 3 can be provided.
  • FIGS. 8 to 10 illustrate variants with regard to the arrangement and design of the transmitter 1 or of the receiver 2.
  • a transparent transmitter 1 can be combined according to Figure 8 with a non-transparent receiver 2, the latter being to be arranged on the periphery of the disc. On the one hand, on the one hand, it does not disturb the driver's field of vision, on the other hand, dirty edge areas of the windscreen are penetrated by the right
  • FIG. 9 Another possibility is shown in FIG. 9 and is based on a further coupling element 9 with which the radiation 11 is coupled out to an external receiver 2 in the interior of the motor vehicle.
  • the transmitter may not be transparent and the receiver may be transparent.
  • the waveguide 8 can advantageously have a glass film as the core and a cladding layer of Teflon, and be arranged in or on the adhesive intermediate layer 5 of a laminated glass pane.
  • a glass film as the core and a cladding layer of Teflon
  • Teflon Teflon
  • the direct integration of the layered transparent transmitter 1 and receiver 2 in the PVB layer 5 is fundamentally possible.
  • the indirect integration with the aid of a polymer film 10, which is integrated in or on the adhesive interlayer 5 of a laminated glass pane is technically easier to carry out.
  • the transparent transmitter 1, or the transparent transmitter 1 and the transparent receiver 2 are formed in the polymer film 10.
  • the transparent layer structures 1 and 2 can then be advantageously produced initially in the polymer film 10 and this can later be integrated into the PVB layer 5.

Landscapes

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

Abstract

L'objectif de l'invention est de créer un éclairage (11) pouvant être dirigé vers un domaine de détection (12) sur le pare-brise disposé entre l'émetteur (1) et le récepteur (2) dans un passage lumineux, dans un détecteur optique permettant de détecter l'humidité sur le pare-brise d'un véhicule à moteur. A cet effet, l'émetteur (1) et/ou le récepteur (2) est formé de manière transparente et ils sont intégrés dans le pare-brise. De ce fait, les éléments (1, 2, 3, 8, 9) optiques transparents sont disposés dans la partie d'une aire balayée par l'essuie-glace du pare-brise nettoyé par un essuie-glace.
EP05797247A 2004-11-11 2005-10-12 Detecteur optique pour detecter de l'humidite sur un pare-brise d'un vehicule a moteur Withdrawn EP1812785A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004054465A DE102004054465A1 (de) 2004-11-11 2004-11-11 Optischer Sensor zur Detektion von Feuchtigkeit auf einer Scheibe eines Kraftfahrzeugs
PCT/EP2005/055174 WO2006051028A1 (fr) 2004-11-11 2005-10-12 Detecteur optique pour detecter de l'humidite sur un pare-brise d'un vehicule a moteur

Publications (1)

Publication Number Publication Date
EP1812785A1 true EP1812785A1 (fr) 2007-08-01

Family

ID=35457231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05797247A Withdrawn EP1812785A1 (fr) 2004-11-11 2005-10-12 Detecteur optique pour detecter de l'humidite sur un pare-brise d'un vehicule a moteur

Country Status (8)

Country Link
US (1) US20080212101A1 (fr)
EP (1) EP1812785A1 (fr)
JP (1) JP2008524557A (fr)
KR (1) KR20070084148A (fr)
CN (1) CN101057133A (fr)
BR (1) BRPI0506380A (fr)
DE (1) DE102004054465A1 (fr)
WO (1) WO2006051028A1 (fr)

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WO2006051028A1 (fr) 2006-05-18
DE102004054465A1 (de) 2006-05-24
KR20070084148A (ko) 2007-08-24
BRPI0506380A (pt) 2006-12-26
US20080212101A1 (en) 2008-09-04
CN101057133A (zh) 2007-10-17
JP2008524557A (ja) 2008-07-10

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