JP7339524B2 - 液滴センサ - Google Patents
液滴センサ Download PDFInfo
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- JP7339524B2 JP7339524B2 JP2019178498A JP2019178498A JP7339524B2 JP 7339524 B2 JP7339524 B2 JP 7339524B2 JP 2019178498 A JP2019178498 A JP 2019178498A JP 2019178498 A JP2019178498 A JP 2019178498A JP 7339524 B2 JP7339524 B2 JP 7339524B2
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- Prior art keywords
- light
- detection area
- area
- effective detection
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Classifications
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- 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
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- 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
-
- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
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- 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
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/063—Illuminating optical parts
- G01N2201/0636—Reflectors
- G01N2201/0637—Elliptic
Description
<第1実施形態>
図1は、第1実施形態に係るレインセンサ10の側面図である。図2は、第1実施形態に係るレインセンサ10の斜視図である。レインセンサ10は、雨滴の付着を検出する。雨滴の検出結果から、たとえば単位時間当たり、及び/又は単位面積あたりの雨量を計測することができる。
<変形例>
次に、上記実施形態の変形例について説明する。
Claims (5)
- 回転楕円体の一部であって楕円面を有する光学カバーと、
前記楕円面の第1焦点又はその近傍に配置された光源と、
前記楕円面の第2焦点又はその近傍に配置された光検出器と、
を有し、
前記楕円面は、前記光源から出力された光を前記光検出器に向けて反射し、前記楕円面への液滴の付着により反射光量が変化する有効検出エリアを含み、
前記光学カバーには、前記光検出器が配置される前記第2焦点を中心とした半球状の空間が形成されており、
前記光学カバーと前記半球状の空間との界面において、前記有効検出エリアからの光が入射する領域に透過散乱面が形成されており、
前記透過散乱面は、表面粗さが異なる複数の領域を有することを特徴とする液滴センサ。 - 前記複数の領域は、それぞれ前記楕円面の長軸を回転軸とした回転対称の領域であることを特徴とする請求項1に記載の液滴センサ。
- 前記複数の領域は、前記有効検出エリアにおいて放射照度が大きいエリアからの光が入射する領域ほど表面粗さが大きいことを特徴とする請求項2に記載の液滴センサ。
- 前記界面のうち、前記透過散乱面以外の領域は、透過鏡面である請求項1ないし3いずれか1項に記載の液滴センサ。
- 前記光学カバーは、前記回転楕円体を、長軸を含む平面で切断した形状であることを特徴とする請求項1ないし4いずれか1項に記載の液滴センサ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019178498A JP7339524B2 (ja) | 2019-09-30 | 2019-09-30 | 液滴センサ |
US17/029,457 US11486827B2 (en) | 2019-09-30 | 2020-09-23 | Droplet sensor |
CN202011053307.XA CN112578472A (zh) | 2019-09-30 | 2020-09-29 | 液滴传感器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019178498A JP7339524B2 (ja) | 2019-09-30 | 2019-09-30 | 液滴センサ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2021056063A JP2021056063A (ja) | 2021-04-08 |
JP7339524B2 true JP7339524B2 (ja) | 2023-09-06 |
Family
ID=75119755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019178498A Active JP7339524B2 (ja) | 2019-09-30 | 2019-09-30 | 液滴センサ |
Country Status (3)
Country | Link |
---|---|
US (1) | US11486827B2 (ja) |
JP (1) | JP7339524B2 (ja) |
CN (1) | CN112578472A (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7339523B2 (ja) * | 2019-09-30 | 2023-09-06 | ミツミ電機株式会社 | 液滴センサ |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004511757A (ja) | 2000-07-19 | 2004-04-15 | ザ ゲイツ コーポレイション | 光学降雨センサ |
US20060043270A1 (en) | 2004-08-27 | 2006-03-02 | The Toro Company | Optical moisture sensor and method of making the same |
JP2009150808A (ja) | 2007-12-21 | 2009-07-09 | Yamatake Corp | 曇り検出装置および鏡面冷却式露点計 |
JP2011255028A (ja) | 2010-06-10 | 2011-12-22 | Canon Inc | 光音響測定装置 |
JP2014238383A (ja) | 2013-05-08 | 2014-12-18 | 株式会社デンソー | 水滴検出センサ |
JP2018017546A (ja) | 2016-07-26 | 2018-02-01 | 株式会社デンソー | レインセンサ |
US20180347797A1 (en) | 2017-05-31 | 2018-12-06 | Abb Schweiz Ag | Light emitting diode sensor device |
WO2019130844A1 (ja) | 2017-12-28 | 2019-07-04 | ミツミ電機株式会社 | 液滴センサ |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4374795B2 (ja) * | 2001-04-02 | 2009-12-02 | 株式会社デンソー | 雨滴センサ |
US8786860B2 (en) * | 2011-10-20 | 2014-07-22 | Schlumberger Technology Corporation | Measurement of liquid fraction dropout using micropatterned surfaces |
JP6094354B2 (ja) | 2013-04-18 | 2017-03-15 | 株式会社デンソー | 雨滴検出装置 |
KR102122536B1 (ko) * | 2013-12-27 | 2020-06-29 | 엘지디스플레이 주식회사 | 이종 물질 렌즈를 구비한 액정 표시장치용 직하형 백 라이트 유닛 |
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2019
- 2019-09-30 JP JP2019178498A patent/JP7339524B2/ja active Active
-
2020
- 2020-09-23 US US17/029,457 patent/US11486827B2/en active Active
- 2020-09-29 CN CN202011053307.XA patent/CN112578472A/zh active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004511757A (ja) | 2000-07-19 | 2004-04-15 | ザ ゲイツ コーポレイション | 光学降雨センサ |
US20060043270A1 (en) | 2004-08-27 | 2006-03-02 | The Toro Company | Optical moisture sensor and method of making the same |
JP2009150808A (ja) | 2007-12-21 | 2009-07-09 | Yamatake Corp | 曇り検出装置および鏡面冷却式露点計 |
JP2011255028A (ja) | 2010-06-10 | 2011-12-22 | Canon Inc | 光音響測定装置 |
JP2014238383A (ja) | 2013-05-08 | 2014-12-18 | 株式会社デンソー | 水滴検出センサ |
JP2018017546A (ja) | 2016-07-26 | 2018-02-01 | 株式会社デンソー | レインセンサ |
US20180347797A1 (en) | 2017-05-31 | 2018-12-06 | Abb Schweiz Ag | Light emitting diode sensor device |
WO2019130844A1 (ja) | 2017-12-28 | 2019-07-04 | ミツミ電機株式会社 | 液滴センサ |
Also Published As
Publication number | Publication date |
---|---|
CN112578472A (zh) | 2021-03-30 |
US20210096073A1 (en) | 2021-04-01 |
US11486827B2 (en) | 2022-11-01 |
JP2021056063A (ja) | 2021-04-08 |
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