DE102006038219A1 - Sensor e.g. radar sensor, contamination preventing method for use in rail vehicle, involves rotating closed band in oval form ahead of sensor surface of sensor, where band is permeable for electromagnetic radiation - Google Patents
Sensor e.g. radar sensor, contamination preventing method for use in rail vehicle, involves rotating closed band in oval form ahead of sensor surface of sensor, where band is permeable for electromagnetic radiation Download PDFInfo
- Publication number
- DE102006038219A1 DE102006038219A1 DE102006038219A DE102006038219A DE102006038219A1 DE 102006038219 A1 DE102006038219 A1 DE 102006038219A1 DE 102006038219 A DE102006038219 A DE 102006038219A DE 102006038219 A DE102006038219 A DE 102006038219A DE 102006038219 A1 DE102006038219 A1 DE 102006038219A1
- Authority
- DE
- Germany
- Prior art keywords
- sensor
- band
- electromagnetic radiation
- permeable
- activation
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3225—Cooperation with the rails or the road
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/60—Velocity or trajectory determination systems; Sense-of-movement determination systems wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
-
- 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
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
- G01S2007/4975—Means for monitoring or calibrating of sensor obstruction by, e.g. dirt- or ice-coating, e.g. by reflection measurement on front-screen
-
- 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
- G01S7/4039—Means for monitoring or calibrating of parts of a radar system of sensor or antenna obstruction, e.g. dirt- or ice-coating
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Verhinderung einer Verschmutzung 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 preventing contamination of a sensor based on electromagnetic radiation, in particular a 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 häufig 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 has the problem that the frequently downwardly inclined sensor surfaces environmental pollution, 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. at Failure of the radar sensor must be on a second, usually odometric Measuring method used which is 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 vor einer Sensorfläche ein geschlossenes, für die elektromagnetische Strahlung durchlässiges Band oval geführt umläuft. Ein kurzzeitiger Bandumlauf oder wenige gepulste Bandumläufe genügen, um eine vollständige Vereisung oder die Verwehung der die Sensorfläche schützenden Bandoberfläche rechtzeitig zu verhindern, so dass der vom Ausfall bedrohte Sensor weiterhin funktionsfähig ist. Die störende Schicht auf der Bandoberfläche kann auf diese Weise mit relativ geringem Energieaufwand beseitigt werden. Durch die ovale Umlauf-Bewegung des Bandes wird darauf fallender Schnee sofort weggeschleudert. Um den Strahlengang des Sensors nicht zu beeinträchtigen, müssen die Abmessungen des Bandes ausreichend größer als die Sensorfläche sein. Sofern bei Fahrzeugstillstand Wasser oder Schnee an dem Band festfrieren sollte, entsteht beim Anlauf des Bandes praktisch ein Selbstreinigungseffekt, da sich der Biegeradius des Bandes durch den ovalen Umlauf verändert und Festgefrorenes abplatzt. Außerdem muss das Bandmaterial auch bei niedrigen Temperaturen eine hohe Flexibilität aufweisen und stabil genug sein, um bei Steinschlag nicht zu zerreißen. Durch den Bandumlauf, der 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 in front of a sensor surface a closed, for the electromagnetic radiation permeable band is guided in an oval shape. One short-term belt circulation or a few pulsed belt revolutions are sufficient to a complete Icing or drift of the tape surface protecting the sensor surface in good time to prevent so that the sensor threatened by the failure continues functioning is. The disturbing Layer on the tape surface can be eliminated in this way with relatively little energy become. Due to the oval circulation movement of the band is falling on it Snow immediately thrown away. Not around the beam path of the sensor to impair have to the dimensions of the tape be sufficiently larger than the sensor surface. If water or snow freezes on the belt during vehicle standstill should, at the start of the tape practically a self-cleaning effect, because the bending radius of the band changed by the oval circulation and Frozen chips off. Furthermore the band material must be high even at low temperatures flexibility and stable enough so as not to break when chipped. By the band circulation, preferably only in case of contamination is triggered can the agreed and proven security objectives, in particular be achieved more reliably at ETCS, even in adverse environmental conditions. Downtime of the sensors is reduced, so their availability elevated becomes. Ultimately, there is an improved acceptance of the ETCS.
Gemäß Anspruch 2 wird die Aktivierung des Bandumlaufes periodisch getaktet. Die Pausenzeit kann dabei im Minutenbereich liegen, während die Dauer der Bandumläufe in der Größenordnung mehrerer Sekunden liegt.According to claim 2, the activation of the tape cycle is periodically clocked. The Break time can be in the minutes range, while the duration the band circulations in the order of magnitude several seconds.
Vorzugswiese erfolgt die Aktivierung des Bandumlaufes gemäß Anspruch 3 in Abhängigkeit von der Umgebungstemperatur der Sensorfläche. Die Aktivierung kann beispielsweise bei Temperaturen unter 3°C erfolgen. Die Verhinderung der Verschmtzung des Sensors ist durch dessen indirekte Reinigung mittels des Umlaufbandes im Gegensatz zur manuellen Reinigung auch während der Fahrt des Fahrzeugs, insbesondere Schienenfahrzeugs, möglich.preferred meadow the activation of the belt circulation takes place according to claim 3 as a function of the ambient temperature of the sensor surface. The activation can be, for example at temperatures below 3 ° C respectively. Preventing the contamination of the sensor is through its indirect cleaning by means of the circulating belt in contrast to manual cleaning even while the journey of the vehicle, in particular rail vehicle, possible.
Zusätzlich oder alternativ zu der temperaturabhängigen Aktivierung des Bandumlaufes 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, insbeson dere Radarsignals, eine Reinigungsaktion ausgelöst wird. Auf diese Weise ergibt sich eine energetisch sehr günstige Lösung, da der Bandumlauf ausschließlich bei tatsächlichem Bedarf aktiviert wird.In addition or as an alternative to the temperature-dependent activation of the belt circulation, a dependency of at least one parameter of at least one measurement signal of the sensor can also be provided. This parameter may be, for example, the intensity of the measurement signal, so that a cleaning action is triggered already at the beginning of attenuation of the signal, in particular radar signal. In this way, results in an energetically very favorable solution, since the Belt circulation is activated only when actually needed.
Eine Vorrichtung zur Durchführung des Verfahrens ist in Anspruch 5 gekennzeichnet. Dabei ist vor einer Sensorfläche des Sensors ein geschlossenes, oval umlaufendes und für die elektromagnetische Strahlung durchlässiges Band angeordnet. Die Vorrichtung ist – wie das Verfahren – zur Verhinderung der Verschmutzung 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 5. It is in front of you sensor surface of the sensor a closed, oval rotating and for the electromagnetic Radiation permeable Band arranged. The device is - like the method - to prevent the pollution of different types of sensors in terms of various Pollution types suitable. Although the description is overwhelming weather-related contamination of radar sensors in rail vehicles is not a restriction connected to this particular application.
Gemäß Anspruch 6 ist mindestens eine auf das Band wirkende Abstreiflippe vorgesehen. Die Entfernung von Schmutzpartikeln, Schnee und Eis wird dadurch unterstützt.According to claim 6, at least one wiper lip acting on the band is provided. The removal of dirt particles, snow and ice is thereby supported.
Zur ovalen Führung des Bandumlaufes sind gemäß Anspruch 7 zwei außerhalb des Strahlenganges des Sensors angeordnete Umlenkwalzen vorgesehen. Vorzugsweise ist dabei eine der Umlenkwalzen angetrieben – nach Art eines Förderbandes.to oval guide the band circulation are according to claim 7 two outside provided the beam path of the sensor arranged deflection rollers. Preferably, one of the guide rollers is driven - according to Art a conveyor belt.
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:
Wegen geringerer Wahrscheinlichkeit der Anhaftung störender Partikel ergibt sich eine höhere Verfügbarkeit des Sensors, insbesondere bei winterlichen Verhältnissen.Because of lesser probability of adhesion of interfering particles results a higher availability the sensor, especially in winter conditions.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006038219A DE102006038219A1 (en) | 2006-08-03 | 2006-08-03 | Sensor e.g. radar sensor, contamination preventing method for use in rail vehicle, involves rotating closed band in oval form ahead of sensor surface of sensor, where band is permeable for electromagnetic radiation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006038219A DE102006038219A1 (en) | 2006-08-03 | 2006-08-03 | Sensor e.g. radar sensor, contamination preventing method for use in rail vehicle, involves rotating closed band in oval form ahead of sensor surface of sensor, where band is permeable for electromagnetic radiation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006038219A1 true DE102006038219A1 (en) | 2008-02-07 |
Family
ID=38885053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006038219A Ceased DE102006038219A1 (en) | 2006-08-03 | 2006-08-03 | Sensor e.g. radar sensor, contamination preventing method for use in rail vehicle, involves rotating closed band in oval form ahead of sensor surface of sensor, where band is permeable for electromagnetic radiation |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102006038219A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018205656A1 (en) * | 2018-04-13 | 2019-10-17 | Siemens Aktiengesellschaft | Temperature monitoring for the detection of functional impairments of radar sensors of rail vehicles |
US11002831B2 (en) | 2018-09-28 | 2021-05-11 | Toyota Motor Engineering & Manufacturing North America, Inc. | Active road debris blocking devices and road debris blocking systems for vehicles |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10151981A1 (en) * | 2001-10-22 | 2003-04-30 | Ibeo Automobile Sensor Gmbh | Optoelectronic detection device, e.g. for detection of objects within the surroundings of a motor vehicle, has a moving transparent protective cover that is moved to allow a detection beam to pass through a clean non-impeding area |
-
2006
- 2006-08-03 DE DE102006038219A patent/DE102006038219A1/en not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10151981A1 (en) * | 2001-10-22 | 2003-04-30 | Ibeo Automobile Sensor Gmbh | Optoelectronic detection device, e.g. for detection of objects within the surroundings of a motor vehicle, has a moving transparent protective cover that is moved to allow a detection beam to pass through a clean non-impeding area |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018205656A1 (en) * | 2018-04-13 | 2019-10-17 | Siemens Aktiengesellschaft | Temperature monitoring for the detection of functional impairments of radar sensors of rail vehicles |
US11002831B2 (en) | 2018-09-28 | 2021-05-11 | Toyota Motor Engineering & Manufacturing North America, Inc. | Active road debris blocking devices and road debris blocking systems for vehicles |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102006024693A1 (en) | Method and device for cleaning a sensor based on electromagnetic radiation | |
EP0112498B1 (en) | Apparatus for automatically cleaning windows | |
DE102006017999B4 (en) | Method for washing a motor vehicle in a car wash and car wash for cleaning motor vehicles | |
EP1214154A2 (en) | Method and device for producing a removable protection layer for surfaces, especially varnished surfaces of motor vehicle bodies | |
DE102016011994A1 (en) | Method for controlling the operation of a windshield wiper device of a motor vehicle and associated motor vehicle | |
DE102007016099A1 (en) | 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 | |
EP1422119A1 (en) | Inductive derailment sensor | |
DE3841333C2 (en) | Method and device for monitoring a condition of a roadway | |
WO2004042143A1 (en) | Scraper blade mounting device | |
DE102006038219A1 (en) | Sensor e.g. radar sensor, contamination preventing method for use in rail vehicle, involves rotating closed band in oval form ahead of sensor surface of sensor, where band is permeable for electromagnetic radiation | |
DE10224971A1 (en) | Method for cleaning a vehicle service brake comprising a brake disc and brake linings | |
DE102013016881A1 (en) | Dispensing device for Reibwertmodifikatoren for a rail vehicle | |
EP2943386B1 (en) | Method and device for analyzing a scattering material and for controlling the application of a scattering material to a rail for a rail vehicle | |
DE102011075490B4 (en) | Method and apparatus for salt spray testing, especially of automotive parts | |
DE102014107358A1 (en) | Apparatus and method for detecting wetness on a roadway | |
DE3816416A1 (en) | Method and device for detecting the weather-dependent state of smoothness of a road surface | |
DE202009013585U1 (en) | Device for removing brake sand on railway tracks | |
DE102005051218B4 (en) | Method and device for avoiding accidents | |
DE1812764C3 (en) | Device for the non-destructive testing of materials on the wheels of railway vehicles | |
DE102009036653A1 (en) | Method for controlling heating device in region of optical sensor system in vehicle, involves providing signals based on evaluated state and measuring variables, so that heating elements of pane surface are controlled | |
DE202005016888U1 (en) | Radar device for measuring speed of trains over ground has inclined sensor surface which is enclosed in hood with radar-transparent bottom wall | |
EP3976426A1 (en) | Method for operating a vehicle treatment system, vehicle treatment system, use of a vehicle treatment system and computer program product | |
DE102016207365A1 (en) | Water-repellent coating of a vehicle window | |
DE2617331C3 (en) | Compressed air sand spreader for rail vehicles | |
DE102008057672A1 (en) | Sensor calibrating device for vehicle, has reference point for calibrating sensor of vehicle that is transportable by conveyor, and arranged on conveyor in constant position with respect to vehicle during calibration |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |