WO1983002093A1 - Windshield wiper control having a sensor - Google Patents
Windshield wiper control having a sensor Download PDFInfo
- Publication number
- WO1983002093A1 WO1983002093A1 PCT/DK1982/000108 DK8200108W WO8302093A1 WO 1983002093 A1 WO1983002093 A1 WO 1983002093A1 DK 8200108 W DK8200108 W DK 8200108W WO 8302093 A1 WO8302093 A1 WO 8302093A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- windshield
- signal
- wipers
- wiper control
- Prior art date
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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S15/00—Brushing, scrubbing, and general cleaning
- Y10S15/15—Moisture responsive
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S318/00—Electricity: motive power systems
- Y10S318/02—Windshield wiper controls
Definitions
- the windshield wiper control according to the invention is of a kind which receives information as to the amount of moisture on the wind ⁇ shield through a sensor which is arranged on the windshield within the area which is swept by the windshield wipers . From this the wiper frequency is adjusted in relation to the current conditions so that, depending on the rain intensity, adequate intervals are inserted in the activation of the wipers .
- the active area of the sensor has to be so large that the signal which is generated is representative of the condition of the windshield in its entity. In practice, it has turned
- the sensor may be of the capacitive type and may generate an AC-signal the frequency of which is indicative of the relative humidity of the windshield . It is known to compare the signal which is received from the sensor with a fixed reference and to activate the windshield wipers when exceeding this reference. I n practice it is , however, very difficult to make this principle provide a stable activation of the wipers . Partly, it is difficult to obtain sufficient temperatu re stability of especially the sensor and partly, impurities which do not normally distu rb the view may affect the sensor and turn on the wipers unintentionally. I n case
- the windshield wiper control according to the invention is character ⁇ ized in that the reference store (2) is connected to the output of the sensor (1 ) so that each time the wiper has just passed the sensor, the sensor signal is written in the store (2) and is used as reference at the next comparison . Thereby it is obtained that the reference is always an expression for the cleanest windshield possible under the given circumstances.
- the wipers are not activated until a certain change of the signal from the sensor relative to the reference has been detected . I n other words when a certain reduction of the view has taken place in relation to the view obtained at the last passage of the wipers. Therefore, the activation time is automatically adjusted in relation to the working conditions . Impurities which are not immedi ⁇ ately removable by means of the wipers will e.g.
- the windshield wiper control is in principle shown in Fig. 1 .
- the signal from the sensor (1 ) is led to a circuit (2) which remembers the maximum (or minimum) value of the signal which is detected after passage of the windshield wipers past the sensor.
- the circuit (2) also allows the reference to follow slow changes of the sensor signal, e.g . caused by temperature drift.
- the reference signal is compared to the signal generated by the sensor by means of the comparator (3) .
- the amplifier (4) is activated which turns on the wiper motor via a relay (5) .
Abstract
A windshield wiper control, e.g. for use in automobiles, receives information as to the amount of humidity on the windshield from a sensor (1) which is arranged within the area which is swept by the windshield wipers, and adjust the wiper frequency in relation thereto. The windshield wiper control includes a circuit (2) which remembers the signal from the sensor just after the windshield wiper has passed the sensor. The signal is compared to the signal directly from the sensor by a comparator (3). Having detected a certain change, the amplifier (4) is activated which turns on th e wiper motor through a relay (5). The sensor may be of the capacitive type.
Description
WI NDSHIELD WI PER CONTROL HAVI NG A SENSOR
A windshield wiper control receives information as to the amount of moisture on the windshield th rough a sensor which is arranged within the area which is swept by the windshield wipers .
In practice it has turned out that merely when driving in definitely rainy weather there is a need for continuous operation of the wind¬ shield wipers. In drizzle or humid weather it is often necessary to intervene manually in the wiping frequency in order to avoid that the wipers are operated on a too dry windshield, which may result in a reduced view and unnecessary wear of both the wiper engine and the wiper blade. It is known that by means of a conventional windshield wiper control, fixed intervals between the individual activation of the wipers may be obtained. However, manual intervention is still needed for adaptation of the length of the intervals in relation to changing weather conditions .
The windshield wiper control according to the invention is of a kind which receives information as to the amount of moisture on the wind¬ shield through a sensor which is arranged on the windshield within the area which is swept by the windshield wipers . From this the wiper frequency is adjusted in relation to the current conditions so that, depending on the rain intensity, adequate intervals are inserted in the activation of the wipers . The active area of the sensor has to be so large that the signal which is generated is representative of the condition of the windshield in its entity. In practice, it has turned
2 out that approximately 25 cm is sufficient. The sensor may be of the capacitive type and may generate an AC-signal the frequency of which is indicative of the relative humidity of the windshield . It is known to compare the signal which is received from the sensor with a fixed reference and to activate the windshield wipers when exceeding this reference. I n practice it is , however, very difficult to make this principle provide a stable activation of the wipers . Partly, it is difficult to obtain sufficient temperatu re stability of especially the sensor and partly, impurities which do not normally distu rb the view may affect the sensor and turn on the wipers unintentionally. I n case
OMPI
A-*, wlPO
a sufficient amount of water is not present for washing away these impurities, the view is impaired by wiping . Thus, it may be neces¬ sary to clean the windshield manually in order to stop the activation of the windshield wipers.
The windshield wiper control according to the invention is character¬ ized in that the reference store (2) is connected to the output of the sensor (1 ) so that each time the wiper has just passed the sensor, the sensor signal is written in the store (2) and is used as reference at the next comparison . Thereby it is obtained that the reference is always an expression for the cleanest windshield possible under the given circumstances. The wipers are not activated until a certain change of the signal from the sensor relative to the reference has been detected . I n other words when a certain reduction of the view has taken place in relation to the view obtained at the last passage of the wipers. Therefore, the activation time is automatically adjusted in relation to the working conditions . Impurities which are not immedi¬ ately removable by means of the wipers will e.g. not disturb the function . Neither will a worn wiper blade which is not capable of completely removing the water disturb, as these new working con- ditions are merely entered into the reference. If, on the other hand, a fixed reference had been employed, the wipers would be activated constantly in an attempt to remove the condition which influenced the sensor. This new principle implies that the windshield wiper control does not have to be adjusted after it has been mounted . Different conditions such as the arrangement of the sensor, the thickness of the glass and the type of glass etc. which vary from installation to installation merely results in different reference values.
It may happen that a windshield wiper control which is turned on is not activated by rain for a time period and, consequently, the wipers are not activated . I n this situation, the reference will not be up¬ dated, so that e.g . temperature drift of the sensor signal may erroneously activate the wipers . I n order to eliminate this situation , the windshield wiper control according to the invention includes a circuit which allows the reference to follow such slow changes of the
signal from the sensor. This may e. g . be obtained by making the reference follow the sensor signal with an appropriately large time constant so that the sensor signal may not drift in relation to the re¬ ference value.
Furthermore, the windshield wiper control is equipped with a circuit which provides for a single activation of the windshield wipers when the windshield wiper control is tu rned on so that the reference is updated. A further circuit provides for automatic change to continu¬ ous activation of the wipers, when the intervals between the activa- tion become so short that continuous activation is more Appropriate.
The windshield wiper control is in principle shown in Fig. 1 . The signal from the sensor (1 ) is led to a circuit (2) which remembers the maximum (or minimum) value of the signal which is detected after passage of the windshield wipers past the sensor. The circuit (2) also allows the reference to follow slow changes of the sensor signal, e.g . caused by temperature drift. The reference signal is compared to the signal generated by the sensor by means of the comparator (3) . When a certain change is reached, the amplifier (4) is activated which turns on the wiper motor via a relay (5) .
OMPI
Claims
1. Windshield wiper control which receives information as to the amount of humidity on the windshield through a sensor (1) which is arranged within the area which is swept by the windshield wipers, wherein the sensor signal is compared to a reference signal which is stored in a reference store 3) so that the wiper motor is activated when a humidity larger than a reference humidity corresponding to the reference signal is measured, c h a r a c t e r i z e d in that the reference store (2) is connect- ed to the output of the sensor (1) so that each time the wipers have just passed the sensor, the sensor signal is written in the store (2) and is employed as reference at the next comparison.
2. Windshield wiper control according to claim 1, c h a r a c t e r i z e d in that it includes a circuit which allows the reference signal to continuously follow slow changes of the signal from the sensor.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8282903580T DE3270035D1 (en) | 1981-12-08 | 1982-12-07 | Windshield wiper control having a sensor |
JP83500062A JPS58502050A (en) | 1981-12-08 | 1982-12-07 | Windshield wiper control with sensor |
AT82903580T ATE18650T1 (en) | 1981-12-08 | 1982-12-07 | WIPER REGULATOR WITH SENSOR. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK541581A DK146959C (en) | 1981-12-08 | 1981-12-08 | WIPER ROBOT WITH FEELER |
DK5415/81811208 | 1981-12-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1983002093A1 true WO1983002093A1 (en) | 1983-06-23 |
Family
ID=8142253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK1982/000108 WO1983002093A1 (en) | 1981-12-08 | 1982-12-07 | Windshield wiper control having a sensor |
Country Status (6)
Country | Link |
---|---|
US (1) | US4495452A (en) |
EP (1) | EP0095472B1 (en) |
JP (1) | JPS58502050A (en) |
DE (1) | DE3270035D1 (en) |
DK (1) | DK146959C (en) |
WO (1) | WO1983002093A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0175362A2 (en) * | 1984-09-19 | 1986-03-26 | Omron Tateisi Electronics Co. | Capacitive-type detection device |
EP0177419A1 (en) * | 1984-10-04 | 1986-04-09 | Saint Gobain Vitrage International | Automatic automotive vehicle windscreen cleaning devices activating arrangement |
EP0191638A2 (en) * | 1985-02-15 | 1986-08-20 | Toyota Jidosha Kabushiki Kaisha | An apparatus and a method for controlling wiper |
EP0438633A1 (en) * | 1990-01-12 | 1991-07-31 | VDO Adolf Schindling AG | Method and means of controlling a windscreen wiper |
EP0443080A1 (en) * | 1990-01-12 | 1991-08-28 | VDO Adolf Schindling AG | Method and means of controlling a windscreen wiper |
WO1992018359A1 (en) * | 1991-04-19 | 1992-10-29 | Robert Bosch Gmbh | Device for operating a rain detector |
WO1996037390A1 (en) * | 1995-05-27 | 1996-11-28 | Robert Bosch Gmbh | Device for operating a windscreen wiper |
DE10316107A1 (en) * | 2003-04-09 | 2004-10-21 | Daimlerchrysler Ag | Method for evaluating a rain sensor |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60140401A (en) * | 1983-12-27 | 1985-07-25 | Nippon Denso Co Ltd | Control method of device for automobile at fault of sensor output |
US4613802A (en) * | 1984-12-17 | 1986-09-23 | Ford Motor Company | Proximity moisture sensor |
US4620141A (en) * | 1985-07-03 | 1986-10-28 | Vericom Corp. | Rain-controlled windshield wipers |
DE3722510A1 (en) * | 1987-07-08 | 1989-01-26 | Bosch Gmbh Robert | DEVICE FOR RAIN-DEPENDENT SWITCHING ON AND OFF OF AN ELECTRIC WIPER MOTOR |
US4798956A (en) * | 1987-07-15 | 1989-01-17 | Hochstein Peter A | Electro-optical windshield moisture sensing |
US4859867A (en) * | 1988-04-19 | 1989-08-22 | Donnelly Corporation | Windshield moisture sensing control circuit |
US4871917A (en) * | 1988-04-19 | 1989-10-03 | Donnelly Corporation | Vehicular moisture sensor and mounting apparatus therefor |
DE3902231A1 (en) * | 1989-01-26 | 1990-08-09 | Voralp Ets | Device for controlling a windscreen wiper |
EP0407538B1 (en) * | 1989-01-26 | 1994-09-07 | Etablissement Voralp | Device for controlling a driving means for a vehicle accessory |
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 |
US4973844A (en) * | 1989-07-10 | 1990-11-27 | Donnelly Corporation | Vehicular moisture sensor and mounting apparatus therefor |
DE3939938A1 (en) * | 1989-12-02 | 1991-06-06 | Vdo Schindling | DEVICE FOR CONTROLLING A WIPER |
JPH0396253U (en) * | 1990-01-24 | 1991-10-01 | ||
US5239244A (en) * | 1992-03-03 | 1993-08-24 | Libbey-Owens-Ford Co. | Vehicle interface for moisture-sensitive wiper control |
US5726547A (en) * | 1993-07-02 | 1998-03-10 | Reime; Gerd | Windshield wiper arrangement including wiper control system |
DE4334381C2 (en) * | 1993-10-08 | 2001-06-28 | Mannesmann Vdo Ag | Device for the automatic control of a wiper motor |
DE19519566C1 (en) * | 1995-05-27 | 1996-07-11 | Bosch Gmbh Robert | Device for operating windscreen wiper |
DE102006000215B4 (en) * | 2006-05-09 | 2019-05-29 | HELLA GmbH & Co. KGaA | Device for controlling a windscreen wiper system of a motor vehicle |
US20080098807A1 (en) * | 2006-10-30 | 2008-05-01 | Agc Automotive Americas R&D, Inc. | Ultrasonic Phase Shift Moisture Sensing System With Temperature Compensation |
US7696710B2 (en) * | 2006-10-30 | 2010-04-13 | Agc Automotive Americas R&D, Inc. | Method of sensing an amount of moisture on a surface of a substrate with temperature compensation |
JP5243604B2 (en) * | 2008-08-04 | 2013-07-24 | 建中 王 | Air blower for automobile back glass |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3786330A (en) * | 1972-04-28 | 1974-01-15 | Nippendenso Co Ltd | Automatic windshield wiping apparatus by using microwaves for vehicles |
US3826979A (en) * | 1972-08-10 | 1974-07-30 | Bosch Gmbh Robert | Capacitive detector device |
US4131834A (en) * | 1975-02-13 | 1978-12-26 | Henry Blaszkowski | Windshield wiper control system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3594563A (en) * | 1968-07-31 | 1971-07-20 | Gen Electric | Numerical control system having improved means for counting in offsets |
GB1382261A (en) * | 1971-11-06 | 1975-01-29 | Seymour L | Electrical operating circuits for windscreen wipers |
DE2361579A1 (en) * | 1973-12-11 | 1975-06-19 | Hans Hermann Wende | Automatic timer for windscreen wiper - having thin film tracks to monitor water coverage of windscreen |
JPS5599441A (en) * | 1979-01-26 | 1980-07-29 | Tokai Rika Co Ltd | Wiper driving unit |
JPS55152642A (en) * | 1979-05-11 | 1980-11-28 | Mitsubishi Electric Corp | Wiper controller |
JPS5647336A (en) * | 1979-09-21 | 1981-04-30 | Nissan Motor Co Ltd | Intermittent drive control device for wiper |
DE3017982C2 (en) * | 1980-05-10 | 1984-07-12 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Control circuit for a windshield wiper motor |
-
1981
- 1981-12-08 DK DK541581A patent/DK146959C/en active
-
1982
- 1982-12-07 EP EP82903580A patent/EP0095472B1/en not_active Expired
- 1982-12-07 JP JP83500062A patent/JPS58502050A/en active Pending
- 1982-12-07 WO PCT/DK1982/000108 patent/WO1983002093A1/en active IP Right Grant
- 1982-12-07 US US06/525,035 patent/US4495452A/en not_active Expired - Lifetime
- 1982-12-07 DE DE8282903580T patent/DE3270035D1/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3786330A (en) * | 1972-04-28 | 1974-01-15 | Nippendenso Co Ltd | Automatic windshield wiping apparatus by using microwaves for vehicles |
US3826979A (en) * | 1972-08-10 | 1974-07-30 | Bosch Gmbh Robert | Capacitive detector device |
US4131834A (en) * | 1975-02-13 | 1978-12-26 | Henry Blaszkowski | Windshield wiper control system |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0175362A2 (en) * | 1984-09-19 | 1986-03-26 | Omron Tateisi Electronics Co. | Capacitive-type detection device |
EP0175362A3 (en) * | 1984-09-19 | 1988-12-07 | Omron Tateisi Electronics Co. | Capacitive-type detection device |
EP0177419A1 (en) * | 1984-10-04 | 1986-04-09 | Saint Gobain Vitrage International | Automatic automotive vehicle windscreen cleaning devices activating arrangement |
FR2571323A1 (en) * | 1984-10-04 | 1986-04-11 | Saint Gobain Vitrage | AUTOMATIC DEVICE FOR ACTUATING THE CLEANING DEVICES OF A MOTOR VEHICLE WINDOW |
EP0191638A2 (en) * | 1985-02-15 | 1986-08-20 | Toyota Jidosha Kabushiki Kaisha | An apparatus and a method for controlling wiper |
EP0191638A3 (en) * | 1985-02-15 | 1989-07-19 | Toyota Jidosha Kabushiki Kaisha | An apparatus and a method for controlling wiper |
EP0438633A1 (en) * | 1990-01-12 | 1991-07-31 | VDO Adolf Schindling AG | Method and means of controlling a windscreen wiper |
EP0443080A1 (en) * | 1990-01-12 | 1991-08-28 | VDO Adolf Schindling AG | Method and means of controlling a windscreen wiper |
US5140234A (en) * | 1990-01-12 | 1992-08-18 | Vdo Adolf Schindling Ag | Windshield wiper control based on rate of change of sensor signal |
WO1992018359A1 (en) * | 1991-04-19 | 1992-10-29 | Robert Bosch Gmbh | Device for operating a rain detector |
US5436541A (en) * | 1991-04-19 | 1995-07-25 | Mangler; Juergen | Rain detector |
WO1996037390A1 (en) * | 1995-05-27 | 1996-11-28 | Robert Bosch Gmbh | Device for operating a windscreen wiper |
DE10316107A1 (en) * | 2003-04-09 | 2004-10-21 | Daimlerchrysler Ag | Method for evaluating a rain sensor |
Also Published As
Publication number | Publication date |
---|---|
DK146959B (en) | 1984-02-27 |
JPS58502050A (en) | 1983-12-01 |
EP0095472A1 (en) | 1983-12-07 |
US4495452A (en) | 1985-01-22 |
DK541581A (en) | 1983-06-09 |
EP0095472B1 (en) | 1986-03-19 |
DE3270035D1 (en) | 1986-04-24 |
DK146959C (en) | 1984-08-06 |
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