DE2345546A1 - Automatic control for windscreen wiper - with capacitative moisture sensor on inside of windscreen under wiped area - Google Patents

Automatic control for windscreen wiper - with capacitative moisture sensor on inside of windscreen under wiped area

Info

Publication number
DE2345546A1
DE2345546A1 DE19732345546 DE2345546A DE2345546A1 DE 2345546 A1 DE2345546 A1 DE 2345546A1 DE 19732345546 DE19732345546 DE 19732345546 DE 2345546 A DE2345546 A DE 2345546A DE 2345546 A1 DE2345546 A1 DE 2345546A1
Authority
DE
Germany
Prior art keywords
windscreen
capacitative
moisture sensor
automatic control
windshield
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
DE19732345546
Other languages
German (de)
Inventor
Karl-Heinz Schmidt
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
Priority to DE19732345546 priority Critical patent/DE2345546A1/en
Publication of DE2345546A1 publication Critical patent/DE2345546A1/en
Pending 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
    • 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
    • B60S1/0825—Capacitive rain sensor
    • B60S1/0829—Oscillator-resonator rain sensor

Abstract

A capacitative moisture sensor is sited on the inside of the windscreen and comprises interdigitated thin film strips. When a film of water appears on the outside of the windscreen the change in capacitance across the glass is detected by a high frequency detection circuit. The monitor is positioned under the wiped area and operates the windscreen wipers completely automatically. The strips are spaced 1 mm apart, and are typically 60 mm X 4 mm in area.

Description

Karl - Heinz Schmidt Offenburg, den 6, 9, I973Karl - Heinz Schmidt Offenburg, 6, 9, 1973

76 Offenburg - lest
Wichernstrasse 576 Offenburg - read
Wichernstrasse 5

Selbsttätige Steuerung einer Kraftfahrzeug - Soheibenwisehanlage·Automatic control of a motor vehicle - Soheibenwisehanlage ·

Die selbsttätige Steuerung einer Scheibenwaschanlage sohaltet den Wischmotor, je nach Erfordernis, ein und aus« Dem Kraftfahrer wird dadurch bei wechselhafter Witterung eine Einsparung von geistiger und manueller Beanspruchung ermöglicht« Nach dieser Erfindung wird die selbsttätige Steuerung der Scheibenwischanlage mit Hilfe eines kapazitiven Feuchtefühlers erreicht· Eine kapazitive Belegung auf der Innenfläche der Windschutzscheibe wird in seinen elektrischen Werten von der Stärke der Feuchtebenetzung auf der Scheibenaussenflache beeinflusst· Diese kapazitive Leitwertänderung kann mit Hilfe hochfrequenter Differenzpegelbildung erfasst, verstärkt, und zum Schalten der Wischanlage genutzt werden·The automatic control of a windshield washer system keeps the Wiper motor, on and off depending on requirements «This means savings for the driver in changeable weather of mental and manual strain made possible «According to this invention, the automatic control of the windshield wiper system achieved with the help of a capacitive humidity sensor · A capacitive assignment on the inner surface of the windshield its electrical values are influenced by the strength of the moisture wetting on the outer surface of the pane This capacitive change in conductance can be recorded, amplified and used to switch the wiper system with the aid of high-frequency differential level formation be used·

Der kapazitive Feuchtefühler liegt räunlich innerhalb des Wischbereiche, dadurch wird die feuchteabhängige Verstimmung nach Einsetzen des Wischvorgangs reduziert· Das Ausschalten der Wischanlage erfolgt, falls nicht anhaltender Niederschlag die Feuchtebenetzung erneuert.The capacitive humidity sensor is colored within the wiping area, this reduces the humidity-dependent detuning after the start of the wiping process. Switching off the wiper system takes place if the precipitation does not last longer, the moisture wetting is renewed.

In Fig* 1 ist der kapazitive Feuchtefühler in natürlicher Grosse gezeichnet« Er besteht aus flachen, in zwei Gruppen zusammengefassten, kammartig ineinandergreifenden Leiterbahnen·In Fig * 1 the capacitive humidity sensor is in natural size drawn «It consists of flat, comb-like interlocking conductor tracks combined in two groups ·

Denkbar sind folgende Maße: Bahnenbreite 1 mm, Bahnenlänge 60 mm,The following dimensions are conceivable: panel width 1 mm, panel length 60 mm,

2 lichter Bfihnenabstand 4 mm, gesamte Fläche ca* 1000 mm · In Fig. 2 ist der kapazitive Feuchtefühler FF im Blockschaltbild eingezeichnet· Der HF - Oszillator G liefert ein Gegentaktsignal über FF sowie über CL an den Verstärkereingang· Nach anschliessender Gleichrichtung betätigt ein elektronischer Schalter den Wischmotor·2 clear web spacing 4 mm, total area approx * 1000 mm The capacitive humidity sensor FF is shown in the block diagram in FIG. 2. The HF oscillator G supplies a push-pull signal via FF and via CL to the amplifier input · After the subsequent rectification, an electronic switch is activated the wiper motor

Denkbar sind folgende elektrischen Werte: Oszillatorfrequenz = 500 ·.· 1000 kHz, Ausgangsspannung des Oszillators » 2 χ 6 V Verstärkergewinn » 5OO ·.· 1000, Kapazität des Feuchtefühlers 10 ·.. 20 pF·The following electrical values are conceivable: oscillator frequency = 500 ·. · 1000 kHz, output voltage of the oscillator »2 χ 6 V Amplifier gain »500 ·. · 1000, capacity of the humidity sensor 10 · .. 20 pF ·

509812/0566509812/0566

Claims (2)

PatentansprücheClaims f 1 ,/Schaltungsanordnung zur selbsttätigen niederschlagsabhängigen Steuerung, insbesondere für Kraftfahrzeug - Scheibenwisohanlagen, dadurch gekennzeichnet «dass diese einen kapazitiven Feuchtefühler enthält, dessen elektrische Werte von der Stärke der Feuchtebenetzung auf der Windschutzscheibe beeinflusst werden·f 1, / circuit arrangement for automatic precipitation-dependent control, in particular for motor vehicle windshield windshield systems, characterized in that it contains a capacitive humidity sensor, the electrical values of which are influenced by the degree of moisture wetting on the windshield · 2. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass der kapazitive Feuchtefühler auf der Innenfläche der Windschutzscheibe innerhalb des Wischbereiches - angebracht ist·2. Circuit arrangement according to claim 1, characterized in that the capacitive humidity sensor is attached to the inner surface of the windshield within the wiping area. 3· Schaltungsanordnung nach Anspruoh 1, dadurch gekennzeichnet t dass der kapazitive Feuchtefühler aus flachen, in zwei Gruppen zusammengefassten, kanmartig ineinandergreifenden Leiterbahaen besteht· 3 · Circuit arrangement according Anspruoh 1, characterized in t that the capacitive moisture sensor of flat, combined into two groups, kanmartig interlocking Leiterbahaen consists · 509812/0566509812/0566
DE19732345546 1973-09-10 1973-09-10 Automatic control for windscreen wiper - with capacitative moisture sensor on inside of windscreen under wiped area Pending DE2345546A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19732345546 DE2345546A1 (en) 1973-09-10 1973-09-10 Automatic control for windscreen wiper - with capacitative moisture sensor on inside of windscreen under wiped area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732345546 DE2345546A1 (en) 1973-09-10 1973-09-10 Automatic control for windscreen wiper - with capacitative moisture sensor on inside of windscreen under wiped area

Publications (1)

Publication Number Publication Date
DE2345546A1 true DE2345546A1 (en) 1975-03-20

Family

ID=5892138

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732345546 Pending DE2345546A1 (en) 1973-09-10 1973-09-10 Automatic control for windscreen wiper - with capacitative moisture sensor on inside of windscreen under wiped area

Country Status (1)

Country Link
DE (1) DE2345546A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3144546A1 (en) * 1981-11-10 1983-05-19 Bernhard 5788 Winterberg Dröge Windscreen wiper interval control
FR2555752A1 (en) * 1983-11-25 1985-05-31 Manzoni Bouchot Sa Hygrometric probe, in particular for windscreen wiper control device
US4554493A (en) * 1984-02-29 1985-11-19 Armstrong Howard L Automated windshield wiper system
US4567412A (en) * 1984-11-29 1986-01-28 General Motors Corporation Automatic wiper actuator for a vehicle window
DE3542032A1 (en) * 1984-12-17 1986-06-26 Ford-Werke AG, 5000 Köln SWITCH-ON DEVICE FOR THE WIPER MOTOR OF A MOTOR VEHICLE
US4748390A (en) * 1984-09-19 1988-05-31 Omron Tateisi Electronics Co. Capacitive-type detection device
US4812615A (en) * 1986-07-24 1989-03-14 Societe Anonyme: Manzoni-Bouchot Electric heating arrangement for a hygrometric sensor of an automatically controlled circuit
US4827198A (en) * 1988-02-09 1989-05-02 General Motors Corporation Vehicle windshield and wiper with rain sensor
US4916374A (en) * 1989-02-28 1990-04-10 Donnelly Corporation Continuously adaptive moisture sensor system for wiper control
DE3902231A1 (en) * 1989-01-26 1990-08-09 Voralp Ets Device for controlling a windscreen wiper
US4956591A (en) * 1989-02-28 1990-09-11 Donnelly Corporation Control for a moisture sensor
DE4445934A1 (en) * 1994-12-22 1996-06-27 Werner Klose Capacitive sensor for measuring moisture content on vehicle screen

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3144546A1 (en) * 1981-11-10 1983-05-19 Bernhard 5788 Winterberg Dröge Windscreen wiper interval control
FR2555752A1 (en) * 1983-11-25 1985-05-31 Manzoni Bouchot Sa Hygrometric probe, in particular for windscreen wiper control device
US4554493A (en) * 1984-02-29 1985-11-19 Armstrong Howard L Automated windshield wiper system
US4748390A (en) * 1984-09-19 1988-05-31 Omron Tateisi Electronics Co. Capacitive-type detection device
US4567412A (en) * 1984-11-29 1986-01-28 General Motors Corporation Automatic wiper actuator for a vehicle window
DE3542032A1 (en) * 1984-12-17 1986-06-26 Ford-Werke AG, 5000 Köln SWITCH-ON DEVICE FOR THE WIPER MOTOR OF A MOTOR VEHICLE
US4812615A (en) * 1986-07-24 1989-03-14 Societe Anonyme: Manzoni-Bouchot Electric heating arrangement for a hygrometric sensor of an automatically controlled circuit
US4827198A (en) * 1988-02-09 1989-05-02 General Motors Corporation Vehicle windshield and wiper with rain sensor
DE3902231A1 (en) * 1989-01-26 1990-08-09 Voralp Ets Device for controlling a windscreen wiper
DE3902231C2 (en) * 1989-01-26 1991-11-14 Etablissement Voralp, Schaan, Li
US4916374A (en) * 1989-02-28 1990-04-10 Donnelly Corporation Continuously adaptive moisture sensor system for wiper control
US4956591A (en) * 1989-02-28 1990-09-11 Donnelly Corporation Control for a moisture sensor
DE4445934A1 (en) * 1994-12-22 1996-06-27 Werner Klose Capacitive sensor for measuring moisture content on vehicle screen

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