DE102007016099A1 - Method for cleaning electromagnetic radiation sensor, especially radar or track vehicle sensor useful in radar and train technology lessens effects of environmental conditions, especially weather on sensor functioning - Google Patents
Method for cleaning electromagnetic radiation sensor, especially radar or track vehicle sensor useful in radar and train technology lessens effects of environmental conditions, especially weather on sensor functioning Download PDFInfo
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- DE102007016099A1 DE102007016099A1 DE102007016099A DE102007016099A DE102007016099A1 DE 102007016099 A1 DE102007016099 A1 DE 102007016099A1 DE 102007016099 A DE102007016099 A DE 102007016099A DE 102007016099 A DE102007016099 A DE 102007016099A DE 102007016099 A1 DE102007016099 A1 DE 102007016099A1
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- sensor
- compressed air
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- electromagnetic radiation
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- 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
- B60S1/54—Cleaning windscreens, windows or optical devices using gas, e.g. hot air
-
- 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
- B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4017—Means for monitoring or calibrating of parts of a radar system of HF systems
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
- G01N2021/151—Gas blown
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Reinigen eines auf elektromagnetischer Strahlung beruhenden Sensors, insbesondere eines Radarsensors oder eines optischen Sensors eines Schienenfahrzeugs.The The invention relates to a method and a device for cleaning a sensor based on electromagnetic radiation, in particular one Radar sensor or an optical sensor of a rail vehicle.
Durch widrige Umweltbedingungen, z. B. Schnee oder Staub, können Sensoren derart verschmutzen, dass Störungen des Sensors auftreten. So kann sich z. B. Schneematsch derart an ein Gehäuse oder eine Sensorfläche des Sensors anlagern, dass der Strahlengang beeinträchtigt ist.By adverse environmental conditions, eg. As snow or dust, sensors can so pollute that interference of the sensor occur. So z. B. slush so on a housing or a sensor surface attach the sensor that the beam path is impaired.
Bei dem Sensor kann es sich beispielsweise um einen Radarsensor oder optischen Sensor zur Messung der Geschwindigkeit eines Schienenfahrzeugs relativ zu dem Boden handeln.at the sensor may be, for example, a radar sensor or optical sensor for measuring the speed of a rail vehicle act relative to the ground.
Bei Radarsensoren tritt das Problem auf, dass die nach unten geneigten Sensorflächen Umweltbelastungen, insbesondere Witterungseinflüssen, ausgesetzt sind, welche durch Dämpfung der Radarstrahlen zum Ausfall des Radarsensors führen können. Besonders prekär tritt dieser Effekt bei verschneiten oder vereisten Sensorflächen auf. Bei Ausfall des Radarsensors muss auf ein zweites, üblicherweise odometrisches Messverfahren zurückgegriffen werden, welches einen größeren Messfehler als der Radarsensor aufweist. Insbesondere bei modernen Zugsicherungssystemen auf der Basis von ETCS (European Train Control System) kann es dabei zu unzulässig großen Messfehlern kommen. Die vereinbarte und nachgewiesene Sicherheit des ETCS kann folglich nicht garantiert werden. Eine automatische Reaktivierung des ausgefallenen Radarsensors ist nicht möglich, solange die Verschmutzung, insbesondere Vereisung, der Sensorfläche andauert. Die Reinigung der Sensorflächen erfolgt üblicherweise manuell, was im laufenden Eisenbahnbetrieb nicht durchführbar ist, so dass bei widrigen Witterungsverhältnissen lange Ausfallzeiten des Radarsensors und damit des Zugsicherungssystems ETCS in Kauf genommen werden müssen.at Radar sensors, the problem occurs that the downturned sensor surfaces Environmental impacts, especially weather conditions, are exposed, which by damping the radar beams can lead to failure of the radar sensor. Particularly precarious occurs this effect on snowy or icy sensor surfaces. In case of failure of the radar sensor must be on a second, usually odometric measuring method can be used which a larger measurement error as the radar sensor has. Especially with modern train protection systems on the basis of ETCS (European Train Control System) can do it too inadmissible huge Measurement errors come. The agreed and proven security Consequently, the ETCS can not be guaranteed. An automatic reactivation the failed radar sensor is not possible as long as the pollution, especially icing, the sensor surface persists. The cleaning the sensor surfaces usually takes place manually, which is not feasible in ongoing railway operations, so that in adverse weather conditions long downtime the radar sensor and thus the train control system ETCS must be taken.
Bekannt sind Versuche, das Vereisungsproblem durch kontinuierliche Druckluftbeaufschlagung oder Beheizung der Sensorflächen zu lösen. Diese Lösungsansätze sind jedoch wegen des erheblichen Energiebedarfs und des großen infrastrukturellen Aufwandes unpraktikabel.Known are attempts to solve the icing problem by continuous compressed air or Heating of the sensor surfaces to solve. These approaches are However, because of the considerable energy demand and the large infrastructural effort impractical.
Der Erfindung liegt deshalb die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung anzugeben, durch welche der Einfluss von Umweltbedingungen, insbesondere Witterungsbedingungen, auf die Funktionsfähigkeit des Sensors reduziert ist.Of the The invention is therefore based on the object, a method and indicate a device by which the influence of environmental conditions, especially weather conditions, on the functionality the sensor is reduced.
Verfahrensgemäß wird die Aufgabe dadurch gelöst, dass Druckluftstöße auf die Sensorfläche oder in den Strahlengang des Sensors gerichtet werden. Ein einzelner Druckluftstoß oder wenige gepulste Druckluftstöße genügen, um eine vollständige Vereisung oder Verwehung der Sensorfläche rechtzeitig zu verhindern, so dass der vom Ausfall bedrohte Sensor weiterhin funktionsfähig ist. Die störende Schicht auf der Sensorfläche kann auf diese Weise mit relativ geringem Energieaufwand beseitigt werden. Durch die Druckluftsäuberung, die vorzugsweise nur im Falle einer Verschmutzung ausgelöst wird, können die vereinbarten und nachgewiesenen Sicherheitsziele, insbesondere bei ETCS, auch bei widrigen Umweltbedingungen zuverlässiger erreicht werden. Ausfallzeiten der Sensoren werden reduziert, so dass deren Verfügbarkeit erhöht wird. Letztlich ergibt sich eine verbesserte Akzeptanz des ETCS.According to the method, the Task solved by that compressed air surges on the Sensor surface or be directed into the beam path of the sensor. An individual Compressed air blast or a few pulsed blasts of compressed air are enough to a complete To prevent icing or drift of the sensor surface in time, so that the threat of failure sensor is still functional. The disturbing layer on the sensor surface can be eliminated in this way with relatively little energy become. By the compressed air cleaning, which is preferably triggered only in the event of pollution, the agreed and proven security objectives, in particular in ETCS can be achieved more reliably even in adverse environmental conditions. downtime the sensors are reduced, so their availability elevated becomes. Ultimately, there is an improved acceptance of the ETCS.
Gemäß Anspruch 2 werden die Druckluftstöße periodisch getaktet. Die Pausenzeit kann dabei im Minutenbereich liegen, während die Dauer der Druckluftstöße in der Größenordnung mehrerer Millisekunden liegt.According to claim 2, the blasts of compressed air are periodically clocked. The break time can be within minutes, while the Duration of the compressed air surges in the Magnitude several milliseconds.
Vorzugswiese werden die Druckluftstöße gemäß Anspruch 3 in Abhängigkeit von der Umgebungstemperatur der Sensorfläche abgegeben. Die Aktivierung kann beispielsweise bei Temperaturen unter 3°C erfolgen. Die Reinigung des Sensors ist dabei im Gegensatz zur manuellen Reinigung auch während der Fahrt des Fahrzeugs, insbesondere Schienenfahrzeugs, möglich.preferred meadow are the compressed air surges according to claim 3 in dependence emitted from the ambient temperature of the sensor surface. The activation can be done, for example, at temperatures below 3 ° C. The cleaning of the Sensor is in contrast to manual cleaning during the Travel of the vehicle, in particular rail vehicle, possible.
Zusätzlich oder alternativ zu der temperaturabhängigen Aktivierung der Druckluftstöße kann gemäß Anspruch 4 auch eine Abhängigkeit von mindestens einem Parameter mindestens eines Messsignals des Sensors vorgesehen sein. Dieser Parameter kann beispielsweise die Intensität des Messsignals sein, so dass bereits bei beginnender Dämpfung des Signals, insbesondere Radarsignals, eine Reinigungsaktion ausgelöst wird. Auf diese Weise ergibt sich eine energetisch sehr günstige Lösung, da der Druckluftstoß ausschließlich bei tatsächlichem Bedarf aktiviert wird.Additionally or alternatively to the temperature-dependent Activation of the compressed air surges can according to claim 4 also a dependency of at least one parameter of at least one measuring signal of the Be provided sensor. This parameter can be, for example, the intensity be the measurement signal, so that already at the beginning of attenuation of the Signal, in particular radar signal, a cleaning action is triggered. In this way, there is an energetically very favorable solution since the compressed air only at actual Demand is activated.
Gemäß Anspruch 5 werden die Druckluftstöße pneumatisch oder elektrisch erzeugt. Die pneumatische Variante kann dabei nach Art einer Luftpumpe aufgebaut sein. Eine elektrische Druckluftstoßerzeugung kann ein elektrisch angesteuertes Gebläse umfassen.According to claim 5, the compressed air surges are pneumatic or generated electrically. The pneumatic version can after Type of an air pump to be constructed. An electric compressed air shock generation may include an electrically controlled fan.
Kommt es zu einer Blockierung des Strahlenganges eines optischen Sensors, z. B. durch Schneematsch oder Eisklumpen, dann können durch gezielte Druckluftstöße die Verunreinigungen beseitigt werden. Voraussetzung hierfür ist, dass das Sensorgehäuse nicht derart kalt ist, dass der Schneematsch oder der Eisklumpen sofort am Gehäuse festfriert und dadurch der für das Reinigen benötigte Druck nicht mehr ausreicht. Wird das Sensorgehäuse gemäß Anspruch 6 zusätzlich geheizt und somit die Anhaftung des Schneematsches oder des Eisklumpens an der Gehäuseoberfläche minimiert, dann ist die wirksame Druckluftreinigung oft erst möglich.If there is a blockage of the beam path of an optical sensor, for. B. by slush or ice lumps, then the impurities can be eliminated by targeted blasts of compressed air. The prerequisite for this is that the sensor housing is not so cold that the snow or the ice lump immediately freezes on the housing and thus the pressure required for cleaning is no longer sufficient. If the sensor housing according to claim 6 additionally heated and thus minimizes the adhesion of the slush or ice lump on the housing surface, then the effective compressed air cleaning is often only possible.
Eine Vorrichtung zur Durchführung des Verfahrens ist in Anspruch 7 gekennzeichnet. Dabei sind erste Mittel zur Erzeugung von Druckluftstößen und zweite Mittel zur Richtung der Druckluftstöße auf die Sensorfläche oder in den Strahlengang des Sensors vorgesehen. Die Vorrichtung ist – wie das Verfahren – zur Reinigung verschiedenster Sensortypen hinsichtlich verschiedenster Verschmutzungsarten geeignet. Obwohl sich die Beschreibung überwiegend auf witterungsbedingte Verschmutzung von Radarsensoren bei Schienenfahrzeugen bezieht, ist damit keine Beschränkung auf diese spezielle Anwendung verbunden.A Apparatus for carrying out of the method is characterized in claim 7. Here are first Means for generating blasts of compressed air and second means for direction the compressed air surges on the sensor surface or provided in the beam path of the sensor. The device is - like that Procedure - for Cleaning a wide range of sensor types for the most diverse Pollution types suitable. Although the description is mostly on weather-related contamination of radar sensors in rail vehicles is not a restriction connected to this particular application.
Gemäß Anspruch 8 ist zur Erzeugung der Druckluftstöße eine Luftpumpeinrichtung vorgesehen, welche über eine Druckluftleitung mit einem Druckluftkessel verbunden ist. Der Druckluftkessel ist bei Schienenfahrzeugen üblicherweise vorhanden, so dass von diesem lediglich die Druckluftleitung mit der Luftpumpeinrichtung zwecks Pulsgebung der Druckluft abgezweigt ist.According to claim 8 is for generating the compressed air surges an air pump device provided, which over a compressed air line is connected to a compressed air tank. Of the Compressed air tank is usually present on rail vehicles, so that of this only the compressed air line with the air pump device for the purpose of pulsing the compressed air is branched off.
Zur Richtungsgebung der Druckluftstöße ist gemäß Anspruch 9 sowie 10 mindestens eine Druckluftdüse vorgesehen, welche entweder der Sensorfläche zugewandt ist oder in ein den Strahlengang tubusförmig umschließendes Gehäuse einmündet.to Direction of the compressed air surges is according to claim 9 and 10 provided at least one compressed air nozzle, which either the sensor surface facing or opens into a tubular path enclosing the beam path housing.
Gemäß Anspruch 11 ist zusätzlich zu der Druckluftbeaufschlagung eine das Gehäuse zumindest teilweise erwärmbare Heizvorrichtung vorgesehen. Dieses kombinierte Reinigungsverfahren lässt sich besonders effizient realisieren, wenn der Strahlengang durch einen einseitig geöffneten Tubus geschützt ist, die Druckluft demzufolge nur über die eine Öffnung entweichen kann und somit die Verunreinigungen aus dem Sensorgehäuse transportiert werden. Zudem ist in einem nur einseitig geöffneten Tubus eine Heizung besonders effizient, da der Wärmeverlust im Gegensatz zu einer vor dem Fahrtwind ungeschützten Fläche gering ist. Die Effizienz der Druckluftreinigung wird durch die Kombination mit der Heizung entscheidend erhöht.According to claim 11 is additional to the compressed air, a housing at least partially heatable heating device intended. This combined cleaning process can be realize particularly efficiently when the beam path through a one-sided opened Protected tube is, the compressed air therefore only escape through the one opening can and thus transported the contaminants from the sensor housing become. In addition, in a tube open only on one side, a heater particularly efficient, because the heat loss in contrast to a surface that is unprotected from the wind, it is low. The efficiency The compressed air cleaning is by the combination with the heater decisively increased.
Die Erfindung wird nachfolgend anhand figürlicher Darstellungen näher erläutert. Es zeigen:The The invention will be explained in more detail with reference to figurative representations. It demonstrate:
Bei
der in
Der
betrachtete optische Sensor kann jedoch ausfallen, falls ein Klumpen
Schneematsch
Durch die geringere Wahrscheinlichkeit der Anhaftung störender Partikel ergibt sich eine höhere Verfügbarkeit des Sensors, insbesondere bei winterlichen Verhältnissen.Due to the lower probability of the adhesion of interfering particles results in a higher Availability of the sensor, especially in winter conditions.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102007016099A DE102007016099A1 (en) | 2007-03-27 | 2007-03-27 | Method for cleaning electromagnetic radiation sensor, especially radar or track vehicle sensor useful in radar and train technology lessens effects of environmental conditions, especially weather on sensor functioning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102007016099A DE102007016099A1 (en) | 2007-03-27 | 2007-03-27 | Method for cleaning electromagnetic radiation sensor, especially radar or track vehicle sensor useful in radar and train technology lessens effects of environmental conditions, especially weather on sensor functioning |
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DE102007016099A1 true DE102007016099A1 (en) | 2008-10-02 |
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DE102007016099A Ceased DE102007016099A1 (en) | 2007-03-27 | 2007-03-27 | Method for cleaning electromagnetic radiation sensor, especially radar or track vehicle sensor useful in radar and train technology lessens effects of environmental conditions, especially weather on sensor functioning |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013007560A1 (en) | 2013-05-02 | 2013-12-05 | Daimler Ag | Method for heating distance sensor arranged at motor vehicle, involves heating distance sensor according to predetermined criterion, when heater and rear window heater of motor vehicle are activated |
DE202015103626U1 (en) | 2015-07-10 | 2015-10-05 | Haslerrail Ag | Heating for a splash guard |
DE102015210469A1 (en) * | 2015-06-08 | 2016-12-08 | Bombardier Transportation Gmbh | Arrangement for optically detecting an environment of a vehicle, in particular a rail vehicle or a bus, vehicle with the arrangement and method for operating the arrangement |
DE102016223306A1 (en) * | 2016-11-24 | 2018-05-24 | Bayerische Motoren Werke Aktiengesellschaft | Device and method for detecting defects of a test object |
CN109590282A (en) * | 2017-10-03 | 2019-04-09 | 欧姆龙株式会社 | Air purge unit |
US10422278B2 (en) | 2017-09-15 | 2019-09-24 | Progress Rail Locomotive Inc. | Pressure sensor cleaning device |
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DE102013007560A1 (en) | 2013-05-02 | 2013-12-05 | Daimler Ag | Method for heating distance sensor arranged at motor vehicle, involves heating distance sensor according to predetermined criterion, when heater and rear window heater of motor vehicle are activated |
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US10422278B2 (en) | 2017-09-15 | 2019-09-24 | Progress Rail Locomotive Inc. | Pressure sensor cleaning device |
CN109590282A (en) * | 2017-10-03 | 2019-04-09 | 欧姆龙株式会社 | Air purge unit |
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