DE19628124A1 - Train length measurement method using radar - Google Patents

Train length measurement method using radar

Info

Publication number
DE19628124A1
DE19628124A1 DE19628124A DE19628124A DE19628124A1 DE 19628124 A1 DE19628124 A1 DE 19628124A1 DE 19628124 A DE19628124 A DE 19628124A DE 19628124 A DE19628124 A DE 19628124A DE 19628124 A1 DE19628124 A1 DE 19628124A1
Authority
DE
Germany
Prior art keywords
train
signals
arrangement
longitudinal direction
antenna
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.)
Granted
Application number
DE19628124A
Other languages
German (de)
Other versions
DE19628124C2 (en
Inventor
Robert Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE19628124A priority Critical patent/DE19628124C2/en
Publication of DE19628124A1 publication Critical patent/DE19628124A1/en
Application granted granted Critical
Publication of DE19628124C2 publication Critical patent/DE19628124C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
    • B61L15/0054—Train integrity supervision, e.g. end-of-train [EOT] devices
    • 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
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • 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
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds

Abstract

The method involves the use of a radar system which is operated whilst the train is in motion. High frequency (HF) signals are beamed from a section of the train in parallel with the length of the train. From the parts of the echo signals which are without Doppler shift, the information relating to the train length is obtained. The parts of the signals without Doppler shift can be determined by long term integration of the echo signals, or from signals derived from these parts. The method can involve the use of an antenna arrangement with a closely bunched pattern, approximately parallel to the length of the train

Description

Die Erfindung betrifft ein Verfahren und eine Anordnung zur Zuglängenmessung (Integritätsprüfung).The invention relates to a method and an arrangement for train length measurement (integrity check).

Die Zuglängenmessung (Integritätsprüfung) dient der wieder­ holten oder fortlaufenden Überprüfung der Vollständigkeit eines Zuges mit einer Mehrzahl von Wagen und ist insbeson­ dere für Güterzüge von Bedeutung.The train length measurement (integrity check) is used again caught or ongoing verification of completeness a train with a plurality of cars and is in particular important for freight trains.

Die Zuglängenmessung kann beispielsweise indirekt durch an der Strecke angeordnete Achszähleinrichtungen erfolgen, was aber einen erheblichen Infrastrukturaufwand sowie eine Koordination von Meßdaten verschiedener Einrichtungen er­ fordert.The train length measurement can be done indirectly by, for example axle counting devices arranged along the route take place, but what a considerable infrastructure effort and a Coordination of measurement data from various facilities demands.

Aufgabe der vorliegenden Erfindung ist es, ein mit gerin­ gem Aufwand durchführbares Verfahren zur Zuglängenmessung sowie eine Anordnung zur Durchführung eines solchen Ver­ fahrens anzugeben.The object of the present invention is a with Process for train length measurement that can be carried out at great expense and an arrangement for performing such a Ver to indicate driving.

Das erfindungsgemäße Verfahren und die Anordnung zur Durchführung eines solchen Verfahrens sind in den unabhän­ gigen Ansprüchen beschrieben. Die Unteransprüche enthalten vorteilhafte Ausgestaltungen und Weiterbildungen der Er­ findung.The inventive method and the arrangement for Carrying out such a procedure are independent described claims. The sub-claims included advantageous refinements and developments of the Er finding.

Die Erfindung macht sich zunutze, daß bei fahrendem Zug die Echosignale von Zugteilen sich aufgrund verschwinden­ der Relativgeschwindigkeit auf einfache Weise durch Aus­ filtern von Signalanteilen bei der Dopplerfrequenz fD = 0 von Umgebungsechos oder Bodenechos unterscheiden lassen. Während der Fahrt stammen Echosignale bei fD = 0 aus­ schließlich von Zugteilen.The invention makes use of the fact that when the train is moving, the echo signals from train parts can easily be distinguished from ambient echoes or ground echoes by filtering out signal components at the Doppler frequency f D = 0 due to the disappearance of the relative speed. During the journey, echo signals at f D = 0 originate exclusively from train parts.

Aus den Echosignalen der maximalen Echolaufzeit läßt sich z. B. durch Bestimmen der maximalen Zielentfernung die tatsächliche Zuglänge oder durch Vergleich mit vorausge­ gangenen Messungen auch nur die Vollständigkeit des Zuges ermitteln. Vorteilhafterweise ist die Erfindung allein von der Lokomotive aus durchführbar ohne Hilfseinrichtungen an den Wagen.From the echo signals the maximum echo time can be e.g. B. by determining the maximum target distance actual train length or by comparison with pred measurements only the completeness of the train determine. Advantageously, the invention is solely from the locomotive from feasible without auxiliary equipment the car.

Durch die Möglichkeit einer großen Zahl von Einzelmessun­ gen kann eine hohe Zuverlässigkeit der Messung erreicht werden. Eine Langzeitintegration der Echosignale oder dar­ aus abgeleiteter Signale bewirkt die beschriebene Ausfil­ terung der Anteile bei fD = 0 und leistet somit eine Empfindlichkeitssteigerung sowie eine Unterdrückung von seitlichen Störern. Das Integrationsintervall liegt für den benötigten Eindeutigkeitsbereich typischerweise im Millisekundenbereich.Due to the possibility of a large number of individual measurements, a high level of reliability of the measurement can be achieved. Long-term integration of the echo signals or signals derived therefrom causes the described filtering out of the components at f D = 0 and thus increases the sensitivity and suppresses lateral interference. The integration interval for the required uniqueness range is typically in the millisecond range.

Zur Durchführung des Verfahrens wird vorzugsweise eine Pulsradar-Anordnung mit z. B. 50-100 GHz Sendefrequenz, ei­ ner Entfernungsauflösung von 1 m bis 10 m und einem Eindeu­ tigkeitsbereich von ca. 1-2 km eingesetzt. Als kompakte Sende-Empfangs-Einheit kann dabei vorteilhafterweise eine selbstschwingende Mischstufe vorgesehen sein. Die verwen­ dete Antennenanordnung zeigt ein scharf gebündeltes Antennendiagramm und ist vorzugsweise als Gruppenantenne (phased Array), insbesondere als fest verdrahtetes Patch- Phased-Array ausgeführt. Durch die scharfe Bündelung mit einer Diagramm-Halbwertbreite von vorzugsweise kleine I Grad, in horizontaler und/oder vertikaler Richtung kann einer unerwünschten Aufspreizung von Echolaufzeiten begeg­ net werden.A is preferably used to carry out the method Pulse radar arrangement with e.g. B. 50-100 GHz transmission frequency, egg ner distance resolution from 1 m to 10 m and an Eindeu range of about 1-2 km. As a compact Transceiver unit can advantageously be a self-oscillating mixer can be provided. They use The antenna arrangement shows a sharply focused Antenna pattern and is preferably a group antenna (phased array), especially as a hard-wired patch Phased array executed. Through the sharp bundling with a diagram half-value width of preferably small I Degrees, in the horizontal and / or vertical direction counter an undesirable spread of echo delays be net.

Die Messung erfolgt vorzugsweise von einer an einem Ende des Zuges befindlichen Lokomotive aus.The measurement is preferably made from one at one end locomotive located on the train.

Die Abbildungen zeigen zwei bevorzugte Ausführungsformen der Erfindung.The figures show two preferred embodiments the invention.

Bei der in Fig. 1 skizzierten Ausführung ist die Antennen­ anordnung A1 am Unterboden einer an einem Zugende befind­ lichen Lokomotive L befestigt und so ausgerichtet, daß das scharf gebündelte Antennen-Richtdiagramm D1 möglichst par­ allel zur Zuglängsrichtung in den Bereich B zwischen Zugunterboden und Gleisstrang G gerichtet ist. Die Sende­ signale und Echosignale werden in diesem Bereich B ge­ führt, insbesondere durch Spiegelung am Gleisstrang, Schwellen und ebenen Flächen des Zugunterbodens. Echosi­ gnale bei fD = 0 entstehen hauptsächlich durch Reflexionen am Zugunterboden. Durch die Signalführungseigenschaft des Bereichs B ist eine Messung auch in Kurven und auf nicht ebenen Strecken möglich.In the embodiment outlined in Fig. 1, the antenna arrangement A1 is attached to the underbody of a locomotive L located at one end of the train and is aligned so that the sharply bundled antenna directional diagram D1 is as parallel as possible to the longitudinal direction of the train in the area B between the underbody and the track line G is directed. The transmit signals and echo signals are in this area B leads ge, in particular by mirroring on the track, thresholds and flat surfaces of the train floor. Echosi gnale at f D = 0 arise mainly from reflections on the train floor. Due to the signal routing property of area B, measurement is also possible in curves and on non-flat sections.

Die in Fig. 2 skizzierte Ausführungsform sieht zwei an ge­ genüberliegenden Seiten der Lokomotive L angebrachte Teil- Antennenanordnungen A2, A3 vor, die wiederum scharf gebün­ delte und annähernd parallel zur Zuglängsrichtung ausge­ richtete Antennen-Richtdiagramme D2, D3 aufweisen. Bereits in leichten Kurven ergibt sich von der jeweils bezüglich der Schienenstrangkrümmung innenliegenden Teil- Antennenanordnung, in der Skizze beispielsweise A2, eine direkte Sichtlinie zum Zugende. Prinzipiell genügt auch eine einzelne Antennenanordnung A₂ oder A₃, die Messung ist dann auf eine Kurvenrichtung beschränkt.The embodiment outlined in FIG. 2 provides two partial antenna arrangements A2, A3 attached to opposite sides of the locomotive L, which in turn have sharply bundled and approximately parallel to the longitudinal direction of the antenna directional diagrams D2, D3. Even in slight bends, the partial antenna arrangement that is located inside with respect to the curvature of the rail track, for example A2 in the sketch, gives a direct line of sight to the end of the train. In principle, a single antenna arrangement A₂ or A₃ is sufficient, the measurement is then limited to one direction of the curve.

Die Auswertung der Echosignale kann wie bei der ersten Ausführung erfolgen.The evaluation of the echo signals can be the same as for the first Execution done.

In Fig. 3 sind in einer Frontansicht der Lokomotive L Mög­ lichkeiten der Anbringung von Antennenanordnungen A1, A2, A3 skizziert.In Fig. 3 in a front view of the locomotive L Possibilities of attaching antenna arrangements A1, A2, A3 are outlined.

Die Erfindung ist nicht auf die beschriebenen Beispiele beschränkt. Insbesondere können andere Antennenanordnungen und Radarverfahren zum Einsatz kommen. Die Dopplerauswer­ tung von Radar-Echosignalen ist allgemein bekannt.The invention is not based on the examples described limited. In particular, other antenna arrangements can and radar methods are used. The Dopplerauswer device of radar echo signals is generally known.

Claims (8)

1. Verfahren zur Zuglängenmessung mittels Radar, bei wel­ chem während der Fahrt von einem Zugteil aus Hochfrequenz­ signale parallel zur Zuglängsrichtung abgestrahlt werden und aus den Anteilen der empfangenen Echosignale ohne Dopplerverschiebung eine Information über die Zuglänge ab­ geleitet wird.1. Procedure for measuring train length using radar, at wel chem while driving from a train part from high frequency signals are emitted parallel to the longitudinal direction of the train and from the portions of the received echo signals without Doppler shift information about the train length is directed. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Bestimmung der Echosignalanteile ohne Dopplerverschie­ bung durch Langzeitintegration der Echosignale oder daraus abgeleiteter Signale erfolgt. 2. The method according to claim 1, characterized in that the determination of the echo signal components without Doppler shift exercise by long-term integration of the echo signals or from them derived signals.   3. Anordnung zur Durchführung des Verfahrens nach An­ spruch 1, gekennzeichnet durch eine Antennenanordnung mit einem stark gebündelten Diagramm das annähernd parallel zur Zuglängsrichtung ausgerichtet ist.3. Order to carry out the method according to An saying 1, characterized by an antenna arrangement with a strongly bundled diagram that is approximately parallel is aligned to the longitudinal direction of the train. 4. Anordnung nach Anspruch 3, dadurch gekennzeichnet, daß die Antennenanordnung (A1) am Unterboden eines Zugteils angeordnet und das Diagramm (D1) in den Bereich zwischen Zugunterboden und Gleisstrang gerichtet ist.4. Arrangement according to claim 3, characterized in that the antenna arrangement (A1) on the underbody of a train part arranged and the diagram (D1) in the range between Train underbody and track line is directed. 5. Anordnung nach Anspruch 3, dadurch gekennzeichnet, daß die Antennenanordnung seitlich an einem Zugteil angeordnet und das Diagramm parallel zur Zuglängsrichtung ausgerich­ tet ist.5. Arrangement according to claim 3, characterized in that the antenna arrangement is arranged laterally on a pulling part and the diagram is aligned parallel to the longitudinal direction of the train is. 6. Anordnung nach Anspruch 5, gekennzeichnet durch zwei Teilantennen (A2, A3), die an gegenüberliegenden Seiten eines Zugteils angeordnet sind, und deren Diagramme (D2, D3) jeweils annähernd parallel zur Zuglängsrichtung ausge­ richtet ist.6. Arrangement according to claim 5, characterized by two Partial antennas (A2, A3) on opposite sides a pulling part are arranged, and their diagrams (D2, D3) in each case approximately parallel to the longitudinal direction of the train is aimed. 7. Anordnung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Antennenanordnung als Phased-Ar­ ray-Antenne ausgeführt ist.7. Arrangement according to one of claims 3 to 6, characterized characterized in that the antenna arrangement as Phased-Ar ray antenna is executed. 8. Anordnung nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, daß sie eine selbstschwingende Mischstufe als Sende-Empfangseinheit enthält.8. Arrangement according to one of claims 3 to 7, characterized characterized in that it is a self-oscillating mixer contains as a transceiver.
DE19628124A 1996-07-12 1996-07-12 Method and arrangement for train length measurement Expired - Fee Related DE19628124C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19628124A DE19628124C2 (en) 1996-07-12 1996-07-12 Method and arrangement for train length measurement

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Application Number Priority Date Filing Date Title
DE19628124A DE19628124C2 (en) 1996-07-12 1996-07-12 Method and arrangement for train length measurement

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DE19628124A1 true DE19628124A1 (en) 1998-01-15
DE19628124C2 DE19628124C2 (en) 2003-04-10

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8688297B2 (en) 2010-11-10 2014-04-01 Lockheed Martin Corporation Methods and systems for continually measuring the length of a train operating in a positive train control environment
US8918237B2 (en) 2013-03-15 2014-12-23 Lockheed Martin Corporation Train integrity and end of train location via RF ranging
US9174657B2 (en) 2013-03-15 2015-11-03 Lockheed Martin Corporation Automated real-time positive train control track database validation
DE102016001189A1 (en) 2016-02-03 2016-08-11 Daimler Ag Method for monitoring backspace in a team
EP3495230A1 (en) * 2017-12-08 2019-06-12 Thales Management & Services Deutschland GmbH Train control network, method for communication and method for controlling train integrity

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4238034C1 (en) * 1992-11-11 1994-03-31 Michael Dipl Ing Sartori Method and device for inspecting, contactless scanning of the immediate vicinity of a track with regard to certain measurement criteria
DE4436983A1 (en) * 1994-10-06 1996-04-11 Siemens Ag Relative distance measuring system between reference point and railway train

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4238034C1 (en) * 1992-11-11 1994-03-31 Michael Dipl Ing Sartori Method and device for inspecting, contactless scanning of the immediate vicinity of a track with regard to certain measurement criteria
DE4436983A1 (en) * 1994-10-06 1996-04-11 Siemens Ag Relative distance measuring system between reference point and railway train

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8688297B2 (en) 2010-11-10 2014-04-01 Lockheed Martin Corporation Methods and systems for continually measuring the length of a train operating in a positive train control environment
US8918237B2 (en) 2013-03-15 2014-12-23 Lockheed Martin Corporation Train integrity and end of train location via RF ranging
US9174657B2 (en) 2013-03-15 2015-11-03 Lockheed Martin Corporation Automated real-time positive train control track database validation
DE102016001189A1 (en) 2016-02-03 2016-08-11 Daimler Ag Method for monitoring backspace in a team
EP3495230A1 (en) * 2017-12-08 2019-06-12 Thales Management & Services Deutschland GmbH Train control network, method for communication and method for controlling train integrity
WO2019110673A1 (en) * 2017-12-08 2019-06-13 Thales Management & Services Deutschland Gmbh Train control network, method for communication and method for controlling train integrity
AU2018379331B2 (en) * 2017-12-08 2022-06-16 Thales Management & Services Deutschland Gmbh Train control network, method for communication and method for controlling train integrity
US11460288B2 (en) 2017-12-08 2022-10-04 Thales Management & Services Deutschland Gmbh Train control network, method for communication and method for controlling train integrity

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Owner name: DAIMLERCHRYSLER AG, 70567 STUTTGART, DE

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