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DE102005058718A1 - Sensor system for motor vehicle, has surrounding detection sensor formed as proximity sensor, rain sensor having low- resolution camera, and common evaluation unit for evaluation of sensor data, where sensors are arranged in common housing - Google Patents

Sensor system for motor vehicle, has surrounding detection sensor formed as proximity sensor, rain sensor having low- resolution camera, and common evaluation unit for evaluation of sensor data, where sensors are arranged in common housing Download PDF

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Publication number
DE102005058718A1
DE102005058718A1 DE102005058718A DE102005058718A DE102005058718A1 DE 102005058718 A1 DE102005058718 A1 DE 102005058718A1 DE 102005058718 A DE102005058718 A DE 102005058718A DE 102005058718 A DE102005058718 A DE 102005058718A DE 102005058718 A1 DE102005058718 A1 DE 102005058718A1
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Germany
Prior art keywords
sensor
evaluation
common
rain
sensors
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Granted
Application number
DE102005058718A
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German (de)
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DE102005058718B4 (en
Inventor
Georg Kunert
Werner Steiner
Boris Werthessen
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Aumovio Microelectronic GmbH
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Conti Temic Microelectronic GmbH
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Priority to DE102005058718.6A priority Critical patent/DE102005058718B4/en
Publication of DE102005058718A1 publication Critical patent/DE102005058718A1/en
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Publication of DE102005058718B4 publication Critical patent/DE102005058718B4/en
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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
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00792—Arrangement of detectors
    • 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
    • B60S1/0844—Optical rain sensor including a camera
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust
    • G01N2021/945—Liquid or solid deposits of macroscopic size on surfaces, e.g. drops, films, or clustered contaminants

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

Es wird ein Sensorsystem zur Umgebungserfassung und zur Regendetektion bzw. Verschmutzungserkennung einer Scheibe vorgestellt. Beide Sensoren sind in einem gemeinsamen Gehäuse angeordnet und zur Datenauswertung ist eine gemeinsame Auswerteeinheit vorgesehen.A sensor system for environmental detection and rain detection or contamination detection of a disc is presented. Both sensors are arranged in a common housing and for data evaluation, a common evaluation unit is provided.

Description

Die Erfindung bezieht sich auf die Erfassung der Umgebung und die Detektion von Regen bzw. Verschmutzungen auf einer Windschutzscheibe im Kraftfahrzeug.The This invention relates to environmental detection and detection of rain or dirt on a windshield in the vehicle.

Sensoren zur Umgebungserfassung und Sensoren zur Regendetektion bzw. Verschmutzungserkennung einer Scheibe sind aus der Literatur bekannt. Z. B. wird in DE 10353001 ein Umgebungserfassungssensor beschrieben. Es handelt sich dabei um einen sog. Closing Velocity Sensor bzw. Annäherungssensor, der eine Geschwindigkeitsdifferenz zwischen einem Hindernis und einem Kraftfahrzeug mit einem Radar oder einem Laserstrahl erfasst. Aus diesen Daten können Informationen über die Schwere des Aufpralls abgeleitet und darauf abgestimmte Maßnahmen zum Insassenschutz ergriffen werden. Eine Vorrichtung und ein Verfahren zum Detektieren von auf einer Windschutzscheibe befindlichen Objekten wird in DE 197 49 331 dargelegt. Dazu wird ein Ausschnitt der Windschutzscheibe mit einem auf die Außenseite der Scheibe fokussierten, eine Vielzahl von einzelnen Bildpunkten aufweisenden optischen Sensorarray aufgenommen. Aus den Bilddaten werden die Ortsfrequenzverteilungen der auf dem Bild erfassten Strukturen ermittelt und mit vorgegeben Referenzverteilungen verglichen. Bei Übereinstimmung werden Regentropfen auf der Scheibe erkannt.Sensors for environmental detection and sensors for rain detection or contamination detection of a disc are known from the literature. For example, in DE 10353001 an environment detection sensor described. It is a so-called Closing Velocity Sensor or proximity sensor, which detects a speed difference between an obstacle and a motor vehicle with a radar or a laser beam. From this data, information on the severity of the impact can be derived and coordinated occupant protection measures taken. An apparatus and method for detecting objects on a windscreen is disclosed in US Pat DE 197 49 331 explained. For this purpose, a section of the windscreen is recorded with an optical sensor array having a plurality of individual pixels focused on the outside of the pane. The spatial frequency distributions of the structures recorded on the image are determined from the image data and compared with predetermined reference distributions. If they match, raindrops will be detected on the glass.

Es ist eine Aufgabe der hier vorliegenden Erfindung Sensoren zur Erfassung der Umgebung und die Detektion von Regen bzw. Verschmutzungen auf einer Windschutzscheibe im Kraftfahrzeug kostengünstig und auf kleinem Bauraum anzuordnen.It It is an object of the present invention sensors for detection the environment and the detection of rain or dirt on one Windshield in the vehicle cost and in a small space to arrange.

Die Aufgabe wird erfinderisch gemäß dem unabhängigen Patentanspruchs gelöst. Die abhängigen Unteransprüche zeigen vorteilhafte Ausführungsformen und Weiterentwicklungen der Erfindung auf.The Task is inventive according to the independent claim solved. The dependent ones under claims show advantageous embodiments and further developments of the invention.

Es wird ein Sensorsystem zur Umgebungserfassung und zur Regendetektion bzw. Verschmutzungserkennung einer Scheibe angegeben. Erfindungsgemäß sind beide Sensoren in einem gemeinsamen Gehäuse angeordnet. Es wird zur Datenauswertung eine gemeinsame Datenauswerteeinheit benutzt.It becomes a sensor system for environmental detection and rain detection or contamination detection of a disc specified. Both are according to the invention Sensors arranged in a common housing. It becomes the Data evaluation uses a common data evaluation unit.

Durch ein gemeinsames Gehäuse werden Bauraum und Kosten gespart. Die Auswertung der Sensordaten mit einer gemeinsamen Auswerteeinheit optimiert die Auslastung der Auswerteeinheit (Prozessor) und trägt somit zur Kostenersparnis bei.By a common housing Space and costs are saved. The evaluation of the sensor data with a common evaluation unit optimizes the utilization of the Evaluation unit (processor) and thus contributes to cost savings at.

In einer speziellen Ausgestaltung der Erfindung werden die Daten des Regensensors zur Bewertung der Daten des Umfelderfassungsensors hinzugezogen, der seine elektromagnetische Strahlung ebenfalls durch die Windschutzscheibe sendet und empfängt. Wenn z. B. elektromagnetische Strahlung an einem Beschlags auf der Scheibe stark gestreut wird, ist die Richtungsdetektion des Pre-Crash-Sensors entsprechend eingeschränkt.In In a special embodiment of the invention, the data of the Rain sensor for evaluating the data of the environment detection sensor involved, which also transmits its electromagnetic radiation the windshield sends and receives. If z. B. electromagnetic Radiation is strongly scattered on a horseshoe on the disc, the direction detection of the pre-crash sensor is restricted accordingly.

In einer weiteren Ausgestaltung der Erfindung wird nach der Detektion von Feuchtigkeit o. ä. auf der Scheibe ein Heizmittel und/oder die Lüftung aktiviert.In Another embodiment of the invention is after the detection from moisture or the like the disk a heating medium and / or the ventilation activated.

In einer besonderen Ausführungsform ist der Umgebungserfassungssensor ein Annäherungssensor, der eine Geschwindigkeitsdifferenz zwischen einem Hindernis und einem Kraftfahrzeug erfasst.In a particular embodiment For example, the environment detection sensor is a proximity sensor that has a speed difference between an obstacle and a motor vehicle.

In einer speziellen Ausgestaltung der Erfindung umfasst der Regensensor eine Kamera mit geringer Auflösung, da nur ein Teil der Windschutzscheibe aufgenommen wird und eine die Ortsauflösung, die einzelne Tropfen unterscheidbar darstellt, hinreichend ist.In A special embodiment of the invention comprises the rain sensor a low resolution camera, because only part of the windshield is taken and one the spatial resolution, the single drop represents distinguishable, is sufficient.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher beschrieben.The Invention will be described below with reference to an embodiment.

Das Sensorsystem umfasst einen Umgebungserfassungssensor, der als Annäherungssensor ausgelegt ist. Der Annäherungssensor misst die Laufzeit infraroter Strahlungspulse und bestimmt daraus die Relativgeschwindigkeit zwischen Fahrzeug und Objekt. Weiterhin umfasst das Sensorsystem einen Regensensor, der mit einem CCD oder CMOS-Chip einen Teilbereich der Windschutzscheibe scharf abbildet. Es ist eine Infrarot-Leuchtdiode vorgesehen, die den Teil der Windschutzscheibe beleuchtet, der vom Bildaufnehmerchip aufgenommen wird. Damit ist die Bildaufnahme unabhängig vom Umgebungslicht und kann auch nachts durchgeführt werden.The Sensor system includes an environment detection sensor designed as a proximity sensor is. The proximity sensor Measures the duration of infrared radiation pulses and determines them the relative speed between vehicle and object. Farther The sensor system includes a rain sensor equipped with a CCD or CMOS chip Sharp image of a portion of the windshield. It is an infrared light emitting diode is provided, which is the part of the windscreen illuminated, which is recorded by the image sensor chip. This is the image acquisition independently from ambient light and can also be done at night.

Die erfasste Szenerie wird mithilfe eines Algorithmus in einem Prozessor ausgewertet. Der Prozessor wird auch für die Datenauswertung des Annäherungssensors genutzt. Die Datenauswertung zur Regen- bzw. Verschmutzungsdetektion kann z.B. im sog. Idle-Mode erfolgen, wenn der Annäherungssensor aufgrund des Pulsbetriebs keine Rechenkapazität benötigt. Die Auswertung des Kamerabilds kann mittels zahlreicher Analysemethoden erfolgen. Z. B. ist eine Analyse der Helligkeitsverteilung oder das Ausblenden des nicht fokussierten Hintergrunds über Differentiation oder Kontrasterhöhung möglich. Weiter vorteilhafte Auswertungsmöglichkeiten sind die Verwendung von Kantenfiltern, die ein Zählen der Regentropfen ermöglichen oder eine Musteranalyse mithilfe eines Mustererkennungsalgorithmus z. B. auf der Basis einer Polynomklassifikation.The captured scenery is using an algorithm in a processor evaluated. The processor is also used for data evaluation of the proximity sensor used. The data analysis for rain or pollution detection can e.g. in so-called. Idle mode done when the proximity sensor due to the pulsed operation no computing capacity needed. The evaluation of the camera image can be done by numerous methods of analysis. For example, one is Analysis of the brightness distribution or hiding the unfocused Background on differentiation or increase in contrast possible. Further advantageous evaluation options are the use of edge filters that allow counting of raindrops or pattern analysis using a pattern recognition algorithm z. On the basis of a polynomial classification.

Claims (4)

Sensorsystem zur Umgebungserfassung und zur Regendetektion bzw. Verschmutzungserkennung einer Scheibe dadurch gekennzeichnet, dass beide Sensoren in einem gemeinsamen Gehäuse angeordnet sind und zur Datenauswertung eine gemeinsame Auswerteeinheit vorgesehen ist.Sensor system for environmental detection and rain detection or contamination detection of a disc, characterized in that both sensors are arranged in a common housing and a common evaluation unit is provided for data evaluation. Sensorsystem nach Anspruch 1, dadurch gekennzeichnet, dass die Daten des Regensensors zur Bewertung der Daten des Umfelderfassungsensors und/oder zur Aktivierung von Heizmitteln und/oder Lüftung benutzt werden.Sensor system according to claim 1, characterized that the data of the rain sensor for the evaluation of the data of the environment detection sensor and / or be used to activate heating and / or ventilation. Sensorsystem nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Umgebungserfassungssensor ein Annäherungssensor ist.Sensor system according to one of the preceding claims, characterized characterized in that the environment detection sensor is a proximity sensor is. Sensorsystem nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Regensensor eine Kamera mit geringer Auflösung umfasst.Sensor system according to one of the preceding claims, characterized characterized in that the rain sensor comprises a camera with low resolution.
DE102005058718.6A 2005-12-08 2005-12-08 Sensor system for environmental detection and rain detection Expired - Fee Related DE102005058718B4 (en)

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Application Number Priority Date Filing Date Title
DE102005058718.6A DE102005058718B4 (en) 2005-12-08 2005-12-08 Sensor system for environmental detection and rain detection

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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19749331A1 (en) * 1997-11-07 1999-05-20 Kostal Leopold Gmbh & Co Kg Method of detecting objects on motor vehicle windscreen
EP1418089A2 (en) * 2002-11-05 2004-05-12 C.R.F. Società Consortile per Azioni Multifunctional integrated optical system with CMOS or CCD technology matrix
DE10322010A1 (en) * 2003-05-16 2004-12-02 Daimlerchrysler Ag Image recognition system for detecting precipitation on motor vehicle screen uses defined area of vehicle surface detected by camera through screen as background for image acquisition, processing
DE10353001A1 (en) * 2003-11-13 2005-06-16 Conti Temic Microelectronic Gmbh Device and method for object recognition for a motor vehicle safety device
DE102004015040A1 (en) * 2004-03-26 2005-10-13 Robert Bosch Gmbh Camera in a motor vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19749331A1 (en) * 1997-11-07 1999-05-20 Kostal Leopold Gmbh & Co Kg Method of detecting objects on motor vehicle windscreen
EP1418089A2 (en) * 2002-11-05 2004-05-12 C.R.F. Società Consortile per Azioni Multifunctional integrated optical system with CMOS or CCD technology matrix
DE10322010A1 (en) * 2003-05-16 2004-12-02 Daimlerchrysler Ag Image recognition system for detecting precipitation on motor vehicle screen uses defined area of vehicle surface detected by camera through screen as background for image acquisition, processing
DE10353001A1 (en) * 2003-11-13 2005-06-16 Conti Temic Microelectronic Gmbh Device and method for object recognition for a motor vehicle safety device
DE102004015040A1 (en) * 2004-03-26 2005-10-13 Robert Bosch Gmbh Camera in a motor vehicle

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