WO2002098716A1 - Capteur de pluie dote d'au moins un element chauffant et procede pour chauffer un capteur de pluie - Google Patents

Capteur de pluie dote d'au moins un element chauffant et procede pour chauffer un capteur de pluie Download PDF

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Publication number
WO2002098716A1
WO2002098716A1 PCT/DE2002/001723 DE0201723W WO02098716A1 WO 2002098716 A1 WO2002098716 A1 WO 2002098716A1 DE 0201723 W DE0201723 W DE 0201723W WO 02098716 A1 WO02098716 A1 WO 02098716A1
Authority
WO
WIPO (PCT)
Prior art keywords
rain sensor
heating element
heating
temperature
voltage
Prior art date
Application number
PCT/DE2002/001723
Other languages
German (de)
English (en)
Inventor
Norbert Hog
Bruno Hodapp
Andreas Schneider
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP02735070A priority Critical patent/EP1397278A1/fr
Publication of WO2002098716A1 publication Critical patent/WO2002098716A1/fr

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
    • B60S1/0862—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 including additional sensors
    • B60S1/0866—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 including additional sensors including a temperature sensor
    • 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

Definitions

  • the invention relates to a rain sensor with at least one heating element and a method for heating a rain sensor according to the type of the independent claims.
  • a heating element for example from DE 197 16 975 AI, in which the disk is heated in the area of the measuring section with the aid of a PTC resistor as a heating element.
  • a heating element is arranged on the pane or on the light-guiding body attached to the pane, which is supplied with current by means of corresponding supply lines from the printed circuit board.
  • these devices are complex constructions and therefore correspondingly expensive.
  • the rain sensor according to the invention with the features of the main claim has the advantage that energy is saved and the temperature in the rain sensor can be set more precisely in that the heating element can be controlled in a modulated manner by the control device. This is This is particularly advantageous since the sensitivity of the rain sensor, for example with regard to fog precipitation, is reduced if the pane is heated too much.
  • the rain sensor has a printed circuit board and the heating element is arranged in the region of the printed circuit board.
  • the heating element can be designed in this way using SMD technology. It is particularly advantageous that the heating elements are arranged closer to the optical components, as a result of which the heating thereof takes place more uniformly.
  • a temperature sensor and a control device are provided and the control device only activates the heating element above a threshold temperature. This ensures that the heating element is only activated and thus heats when the temperature inside the rain sensor is below the threshold temperature. This saves energy and increases the service life of the components, especially the heating elements.
  • an electrical voltage can be applied to the rain sensor and the heating element is controlled in a modulated manner taking into account the applied voltage. This makes it possible to be independent of the always present the same heating energy from the heating element.
  • thermosensor is at the same distance from the optical components as the heating element. Sufficient feedback or damping is thus ensured by the thermal resistance of the printed circuit board.
  • the temperature sensor is designed as a negative temperature-dependent resistor (NTC)
  • NTC negative temperature-dependent resistor
  • the method according to the invention for heating a rain sensor has the advantage that the heating power can be set precisely by means of a modulated control of the heating elements and the temperature level of the rain sensor can be maintained very precisely.
  • the rain sensor is supplied with a voltage and the modulation is carried out taking into account the voltage, since the heating power can thus be output very constantly and in particular independently of the voltage.
  • the temperature is measured in the rain sensor and the heating elements are controlled as a function of the measured temperature. As a result, a high temperature constancy can be achieved or a predetermined temperature profile can be run through.
  • FIG. 1 shows a schematic illustration of a rain sensor according to the prior art
  • Figure 2 shows a circuit board of a rain sensor in a schematic representation
  • Figure 3 is a diagram showing the voltage ratio across the heating element over time.
  • FIG. 1 shows a rain sensor with a heating device according to the prior art.
  • the rain sensor has a housing 10 which is attached to a window 14, for example the windshield of a motor vehicle, by means of a coupling medium 12.
  • the rain sensor In order to detect rain or moisture on the side of the pane 14 facing away from the sensor, the rain sensor has transmitter 16 and receiver 18, which are arranged together on a printed circuit board 20.
  • the light from the transmitter 16 is coupled into the coupling medium 12 and the disk 14 via a light guide body 22.
  • the light from the transmitter 16 is totally reflected at the glass-air interface of the pane 14 facing away from the rain sensor and is reflected back to the receiver 18 via the light-guiding body 22. If there is moisture at the glass-air interface of the pane 14, part of the light from the transmitter 16 is scattered away and only a remainder is returned to the receiver 18.
  • the rain sensor has a heating element 23, which is arranged in the region of the light guide body 22 near the pane 14 and is wired to the printed circuit board 20 via long leads 24. These heating elements 24 serve primarily to heat the disk 14 in the region of the measuring section and to allow streaks and ice crystals to evaporate more quickly.
  • FIG. 2 shows a circuit board 20 of a rain sensor according to the invention.
  • the transmitters 16 and the receivers 18 are arranged in pairs opposite one another in the form of a parallelogram.
  • the heating elements 23 are applied directly to the printed circuit board 20 using SMD technology.
  • the heating elements 22 are controlled by a control device 26 designed as a microcomputer via a control transistor 28.
  • a temperature sensor 30 is connected to the control device 26, which measures the temperature inside the housing 10 and forwards a corresponding signal to the control device 26.
  • the circuit board 20 has two contacts 32, between which a voltage U is applied during operation.
  • the control device 26 is designed such that it is able to detect the voltage U present between the contacts 32 and can control the heating elements 23 as a function of the voltage U and the signal from the temperature sensor 30.
  • the temperature sensor 30 is approximately the same distance from one of the transmitters 16 as one of the two heating elements 23.
  • the temperature sensor 30 is designed as an NTC.
  • control of the heating elements 23 is shown as an example.
  • the control device 26 does not apply the working voltage to the heating elements 23 designed as resistors continuously, but rather in a clocked manner.
  • the clock frequency T remains constant, but can also be variable.
  • the working voltage VA in the form of a
  • the time T1 corresponds to the time interval during which the voltage VA is applied to the heating element 23.
  • the time TO is the time interval during which no voltage is applied to the heating element 23.
  • the pulse duty factor TV is, for example, 1.
  • the clock ratio TV is chosen to be correspondingly smaller. In this case Tl will be chosen smaller and TO larger.
  • this influence on the cycle ratio TV can also be exerted by the temperature sensor 30 via the control device 26 and the heating power of the heating elements 22 can thus be set and changed.
  • the heating output dependent on further / different input signals 29.
  • These can be signals of the outside temperature, for example, but also signals that are generated by the rain sensor function, such as control signals from the transmitters 16 or the like.
  • the heating elements 23 can also be arranged somewhat above the printed circuit board 20, but the distance between the light guide body 22 and Heating element 23 may be greater than the distance between printed circuit board 20 and heating element 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

L'invention concerne un capteur de pluie, notamment pour véhicules, comportant au moins un élément chauffant (23) et un dispositif de commande (26), lequel commande l'élément chauffant de manière modulée.
PCT/DE2002/001723 2001-06-01 2002-05-08 Capteur de pluie dote d'au moins un element chauffant et procede pour chauffer un capteur de pluie WO2002098716A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02735070A EP1397278A1 (fr) 2001-06-01 2002-05-08 Capteur de pluie dote d'au moins un element chauffant et procede pour chauffer un capteur de pluie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001127684 DE10127684A1 (de) 2001-06-01 2001-06-01 Regensensor mit mindestens einem Heizelement und Verfahren zum Heizen eines Regensensors
DE10127684.2 2001-06-01

Publications (1)

Publication Number Publication Date
WO2002098716A1 true WO2002098716A1 (fr) 2002-12-12

Family

ID=7687531

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/001723 WO2002098716A1 (fr) 2001-06-01 2002-05-08 Capteur de pluie dote d'au moins un element chauffant et procede pour chauffer un capteur de pluie

Country Status (3)

Country Link
EP (1) EP1397278A1 (fr)
DE (1) DE10127684A1 (fr)
WO (1) WO2002098716A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011031296A1 (fr) * 2009-08-28 2011-03-17 Pilkington Group Limited Détecteur d'humidité optique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029411A1 (de) * 2005-06-24 2007-01-04 Audi Ag Vorrichtung und Verfahren zum Betreiben einer Sensoranordnung in einem Kraftfahrzeug
CN115339414A (zh) * 2017-04-24 2022-11-15 西华大学 新型高精度汽车用雨量传感器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823300C1 (en) * 1988-07-09 1989-08-17 Leopold Kostal Gmbh & Co Kg, 5880 Luedenscheid, De Sensor device
EP0545806A1 (fr) * 1991-12-06 1993-06-09 Regie Nationale Des Usines Renault S.A. Procédé et dispositif de traitement pour la détection de la pluie
DE4307479C1 (de) * 1993-03-10 1994-02-17 Kostal Leopold Gmbh & Co Kg Optoelektronische Sensoreinrichtung
DE4343474A1 (de) * 1993-01-13 1994-07-21 Bosch Gmbh Robert Sensoreinrichtung zur Erfassung des Benetzungs- und/oder Verschmutzungsgrades von Scheiben, insbesondere Frontscheiben von Kraftfahrzeugen
DE4329609C1 (de) * 1993-09-02 1995-02-02 Kostal Leopold Gmbh & Co Kg Optoelektronische Sensoreinrichtung
DE19716975A1 (de) 1997-04-23 1998-10-29 Bosch Gmbh Robert Sensoreinrichtung
WO2001038146A1 (fr) * 1999-11-22 2001-05-31 Bayerische Motoren Werke Aktiengesellschaft Ensemble de detection

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823300C1 (en) * 1988-07-09 1989-08-17 Leopold Kostal Gmbh & Co Kg, 5880 Luedenscheid, De Sensor device
EP0545806A1 (fr) * 1991-12-06 1993-06-09 Regie Nationale Des Usines Renault S.A. Procédé et dispositif de traitement pour la détection de la pluie
DE4343474A1 (de) * 1993-01-13 1994-07-21 Bosch Gmbh Robert Sensoreinrichtung zur Erfassung des Benetzungs- und/oder Verschmutzungsgrades von Scheiben, insbesondere Frontscheiben von Kraftfahrzeugen
DE4307479C1 (de) * 1993-03-10 1994-02-17 Kostal Leopold Gmbh & Co Kg Optoelektronische Sensoreinrichtung
DE4329609C1 (de) * 1993-09-02 1995-02-02 Kostal Leopold Gmbh & Co Kg Optoelektronische Sensoreinrichtung
DE19716975A1 (de) 1997-04-23 1998-10-29 Bosch Gmbh Robert Sensoreinrichtung
WO2001038146A1 (fr) * 1999-11-22 2001-05-31 Bayerische Motoren Werke Aktiengesellschaft Ensemble de detection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011031296A1 (fr) * 2009-08-28 2011-03-17 Pilkington Group Limited Détecteur d'humidité optique
US8271198B2 (en) 2009-08-28 2012-09-18 Hydreon Corporation Optical moisture sensor

Also Published As

Publication number Publication date
EP1397278A1 (fr) 2004-03-17
DE10127684A1 (de) 2002-12-05

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