JPS5722945A - Automatic windshield wiper with rainfall sensor - Google Patents

Automatic windshield wiper with rainfall sensor

Info

Publication number
JPS5722945A
JPS5722945A JP9603580A JP9603580A JPS5722945A JP S5722945 A JPS5722945 A JP S5722945A JP 9603580 A JP9603580 A JP 9603580A JP 9603580 A JP9603580 A JP 9603580A JP S5722945 A JPS5722945 A JP S5722945A
Authority
JP
Japan
Prior art keywords
glass
light
windshield wiper
air
prism
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.)
Pending
Application number
JP9603580A
Inventor
Yoshiji Shishido
Original Assignee
Yoshiji Shishido
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 Yoshiji Shishido filed Critical Yoshiji Shishido
Priority to JP9603580A priority Critical patent/JPS5722945A/en
Publication of JPS5722945A publication Critical patent/JPS5722945A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To sense rainfall and actuate automatically a windshield wiper by leading the light into the glass through a prism fixed to the glass, and by receiving change of the light, reflected internally at the boundary of the glass and the air, with a photoreceiving element through the prism.
CONSTITUTION: The light from a source 1 is led in the glass 5 through a lens 2, a light fiber 3, a prsim 4 fixed to the surface of the glass 5, and reflected intenally at the boundary 6 of the air and glass 5, and then led to a photoreceiving element 8 through the prism 4 and light fiber 7. When the glass 5 is coated with rainwater 11, part of the light is deviated away as shown by the arrow because the refractive index from glass to rainwater is smaller than that from glass to air. Thereby, the light which reaches the photoreceiving element 8 is decreased and the electric signal which reaches the electric circuit 9 is accordingly changed, and thus the windshield wiper 10 will come into operation.
COPYRIGHT: (C)1982,JPO&Japio
JP9603580A 1980-07-14 1980-07-14 Automatic windshield wiper with rainfall sensor Pending JPS5722945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9603580A JPS5722945A (en) 1980-07-14 1980-07-14 Automatic windshield wiper with rainfall sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9603580A JPS5722945A (en) 1980-07-14 1980-07-14 Automatic windshield wiper with rainfall sensor

Publications (1)

Publication Number Publication Date
JPS5722945A true JPS5722945A (en) 1982-02-06

Family

ID=14154190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9603580A Pending JPS5722945A (en) 1980-07-14 1980-07-14 Automatic windshield wiper with rainfall sensor

Country Status (1)

Country Link
JP (1) JPS5722945A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57179150U (en) * 1981-05-08 1982-11-13
JPS5929539A (en) * 1982-08-07 1984-02-16 Nippon Denso Co Ltd Detector for automobile
US4798956A (en) * 1987-07-15 1989-01-17 Hochstein Peter A Electro-optical windshield moisture sensing
US4871917A (en) * 1988-04-19 1989-10-03 Donnelly Corporation Vehicular moisture sensor and mounting apparatus therefor
US4973844A (en) * 1989-07-10 1990-11-27 Donnelly Corporation Vehicular moisture sensor and mounting apparatus therefor
US20110242540A1 (en) * 2010-04-02 2011-10-06 E-Pin Optical Industry Co., Ltd. Rain sensor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57179150U (en) * 1981-05-08 1982-11-13
JPS647314Y2 (en) * 1981-05-08 1989-02-27
JPS5929539A (en) * 1982-08-07 1984-02-16 Nippon Denso Co Ltd Detector for automobile
JPH0348051B2 (en) * 1982-08-07 1991-07-23 Nippon Denso Co
US4798956A (en) * 1987-07-15 1989-01-17 Hochstein Peter A Electro-optical windshield moisture sensing
US4871917A (en) * 1988-04-19 1989-10-03 Donnelly Corporation Vehicular moisture sensor and mounting apparatus therefor
US4973844A (en) * 1989-07-10 1990-11-27 Donnelly Corporation Vehicular moisture sensor and mounting apparatus therefor
US20110242540A1 (en) * 2010-04-02 2011-10-06 E-Pin Optical Industry Co., Ltd. Rain sensor

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