DE69408250D1 - Anordnung zum optischen Erfassen von Wassertropfen mittels Lichtbrechung - Google Patents

Anordnung zum optischen Erfassen von Wassertropfen mittels Lichtbrechung

Info

Publication number
DE69408250D1
DE69408250D1 DE69408250T DE69408250T DE69408250D1 DE 69408250 D1 DE69408250 D1 DE 69408250D1 DE 69408250 T DE69408250 T DE 69408250T DE 69408250 T DE69408250 T DE 69408250T DE 69408250 D1 DE69408250 D1 DE 69408250D1
Authority
DE
Germany
Prior art keywords
arrangement
optical detection
water drops
light refraction
refraction
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.)
Expired - Lifetime
Application number
DE69408250T
Other languages
English (en)
Inventor
H Allen Zimmermann
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
Application granted granted Critical
Publication of DE69408250D1 publication Critical patent/DE69408250D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length

Landscapes

  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
DE69408250T 1993-10-08 1994-09-26 Anordnung zum optischen Erfassen von Wassertropfen mittels Lichtbrechung Expired - Lifetime DE69408250D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/134,407 US5386111A (en) 1993-10-08 1993-10-08 Optical detection of water droplets using light refraction with a mask to prevent detection of unrefracted light

Publications (1)

Publication Number Publication Date
DE69408250D1 true DE69408250D1 (de) 1998-03-05

Family

ID=22463244

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69408250T Expired - Lifetime DE69408250D1 (de) 1993-10-08 1994-09-26 Anordnung zum optischen Erfassen von Wassertropfen mittels Lichtbrechung

Country Status (5)

Country Link
US (2) US5386111A (de)
EP (1) EP0647551B1 (de)
JP (1) JPH07181131A (de)
CA (1) CA2132393A1 (de)
DE (1) DE69408250D1 (de)

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US7736051B2 (en) 2004-03-30 2010-06-15 Yamatake Corporation Thermoelectric device and mirror surface state detection device
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US20080098807A1 (en) * 2006-10-30 2008-05-01 Agc Automotive Americas R&D, Inc. Ultrasonic Phase Shift Moisture Sensing System With Temperature Compensation
US8573049B1 (en) * 2009-11-06 2013-11-05 Underhill International Corporation Rain gauge and irrigation system
US8620523B2 (en) 2011-06-24 2013-12-31 Gentex Corporation Rearview assembly with multiple ambient light sensors
EP2740003B1 (de) 2011-08-05 2017-06-14 Gentex Corporation Optische baugruppe für einen lichtsensor
US8650944B2 (en) * 2012-03-13 2014-02-18 The Boeing Company Supercooled large drop icing condition simulation system
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US9870753B2 (en) 2013-02-12 2018-01-16 Gentex Corporation Light sensor having partially opaque optic
US9207116B2 (en) 2013-02-12 2015-12-08 Gentex Corporation Light sensor
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US11016020B2 (en) * 2019-04-05 2021-05-25 Bendix Commercial Vehicle Systems Llc Humidity detection for compressed air systems
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Also Published As

Publication number Publication date
JPH07181131A (ja) 1995-07-21
US5386111A (en) 1995-01-31
CA2132393A1 (en) 1995-04-09
USRE35762E (en) 1998-04-07
EP0647551A1 (de) 1995-04-12
EP0647551B1 (de) 1998-01-28

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Legal Events

Date Code Title Description
8332 No legal effect for de