JPS596758U

JPS596758U - Water drop detection device for vehicles

Info

Publication number: JPS596758U
Application number: JP10163682U
Authority: JP
Inventors: 正博足立
Original assignee: 日産自動車株式会社
Priority date: 1982-07-05
Filing date: 1982-07-05
Publication date: 1984-01-17

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、従来の水滴検知装置で、車両用ワイパの間欠
制御用に用いられているものの一部破断説明図、第２図
は、第１図に示す水滴検知装置の水滴付着検知を示す説
明図、第３図は、第１図の水滴検知装置の水膜検出不可
能状態を示す説明図、第４図は、実願昭５６−０１５１
５２号の考案の一実施例を示す一部破断説明図、第５図
は、第４図に示す水滴検知装置による水滴付着検知状態
を示す説明図、第６図は、フレネルの法則についての説
明図、第７図は、第４図に示す水滴検知装置による水滴
非付着状態に於ける検知状態の説明図、第８図は、第４
図に示す水滴検知装置による水膜形成状態に於ける検知
状態の説明図、第９図は、この考案の一実施例を示す一
部破断説明図、第１０図は、第９図中矢示■部の拡大説
明図、第１１図は、ウィンドガラスの表面に於ける光の
透過係数と到達係数との関係説明図、そして第１２図は
、入射角と光の透過係数との関係説明図である。５・・・フロントウィンドガラス〔ウィンドガラス〕、
５ｂ・・・フロントウィンドガラスの外側面、９・・・
水滴、３０・・・発光素子、３１・・・受光素子、３３
・・・受光部、３４・・・入射光、３５・・・反射光、
Ｔ・・・透過係数、０１・・・入射光の光軸、０２・・
・反射光の光軸、θ・・・入射角度。第３図 −第６図−Fig. 1 is a partially cutaway explanatory diagram of a conventional water droplet detection device used for intermittent control of vehicle wipers, and Fig. 2 shows water droplet adhesion detection by the water droplet detection device shown in Fig. 1. An explanatory diagram, FIG. 3 is an explanatory diagram showing a state in which the water droplet detection device of FIG. 1 cannot detect a water film, and FIG.
5 is a partially broken explanatory diagram showing an embodiment of the invention of No. 52, FIG. 5 is an explanatory diagram showing a water drop adhesion detection state by the water drop detection device shown in FIG. 4, and FIG. 6 is an explanation of Fresnel's law. 7 is an explanatory diagram of the detection state of the water droplet detection device shown in FIG. 4 in a state where water droplets are not attached, and FIG.
FIG. 9 is a partially cutaway explanatory diagram showing an embodiment of this invention, and FIG. 11 is an explanatory diagram of the relationship between the light transmission coefficient and the arrival coefficient on the surface of the window glass, and FIG. 12 is an explanatory diagram of the relationship between the incident angle and the light transmission coefficient. be. 5...Front windshield [windshield],
5b...Outside surface of front windshield, 9...
Water droplet, 30... Light emitting element, 31... Light receiving element, 33
... Light receiving section, 34 ... Incident light, 35 ... Reflected light,
T...Transmission coefficient, 01...Optical axis of incident light, 02...
・Optical axis of reflected light, θ...angle of incidence. Figure 3-Figure 6-

Claims

[Scope of claim for utility model registration] A light emitting part and a light receiving part are provided on the inside side of the windshield,
In a water droplet detection device for a vehicle that receives reflected light from the outer surface of the windshield out of the light from the light emitting part at the light receiving part and detects water droplets adhering to the windshield based on a change in the amount of reflected light, the light receiving part has the following features: A water droplet detection device for a vehicle, characterized in that it is installed on the ceiling side of a vehicle at a position where the optical axis from the light emitting part has a transmission coefficient of 0.5 to Q, 8 with respect to the surface of a windshield.