EP0919978B1 - Method of controlling at least one stop-display for public transport - Google Patents

Method of controlling at least one stop-display for public transport Download PDF

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Publication number
EP0919978B1
EP0919978B1 EP98440241A EP98440241A EP0919978B1 EP 0919978 B1 EP0919978 B1 EP 0919978B1 EP 98440241 A EP98440241 A EP 98440241A EP 98440241 A EP98440241 A EP 98440241A EP 0919978 B1 EP0919978 B1 EP 0919978B1
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EP
European Patent Office
Prior art keywords
vehicle
stop
display
message
stopping
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Expired - Lifetime
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EP98440241A
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German (de)
French (fr)
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EP0919978A1 (en
Inventor
Wolfgang Grande
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Alcatel CIT SA
Alcatel Lucent SAS
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Alcatel CIT SA
Alcatel SA
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams

Definitions

  • the invention is not limited to the exemplary embodiment specified above. Rather, a number of variants are conceivable, which even if the features are fundamentally different make use of the invention.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The method involves each vehicle transmitting its identity and position to a central station which computes the anticipated waiting tome for the vehicle to reach at least one stop and drives the associated display at the stop to visually show the waiting time. The vehicle transmits a short range Blanking Message, e.g. of 100 meters range, which triggers the display to switch to blanking when the vehicle approaches to within a certain distance of the stop An Independent claim is also included for a drive system for the display.

Description

Die Erfindung betrifft ein Verfahren zur Ansteuerung mindestens eines Haltestellen-Displays gemäß dem Oberbegriff des Anspruchs 1 und ein Ansteuersystem gemäß dem Oberbegriff des Anspruchs 4. Haltestellen-Displays signalisieren dem Benutzer des öffentlichen Personennahverkehrs die voraussichtliche Wartezeit bis zum Eintreffen des nächsten Fahrzeuges (Bus, Tram) einer bestimmten Linie. Dabei ist es erforderlich, im Nahbereich, z.B. bei einem Abstand des Fahrzeuges zur Haltestelle
< 100 Meter, eine Um- bzw. Ausschaltung der Wartezeit-Anzeige zu realisieren. Die Funk-Ansteuerung der Haltestellen-Displays durch die Zentrale ist dazu nicht geeignet, da die Fehlertoleranzen, insbesondere der Positionsdaten-Ermittlung des Fahrzeuges, zu groß sind. Dadurch kann es passieren, daß bei einer in Minutensprüngen ansteuerbare Wartzeit-Anzeige noch eine verbleibende Wartezeit von 1 Minute signalisiert wird, während das Fahrzeug bereits an der Haltestelle eingetroffen ist.The invention relates to a method for controlling at least one stop display according to the preamble of claim 1 and a control system according to the preamble of claim 4. Stop displays indicate to the user of local public transport the expected waiting time until the next vehicle arrives (bus, tram ) of a certain line. It is necessary to do this at close range, for example when the vehicle is at a distance from the bus stop
<100 meters to switch the waiting time display on or off. The radio control of the stop displays by the control center is not suitable for this, since the error tolerances, in particular the determination of the position data of the vehicle, are too great. This can mean that if there is a waiting time display that can be controlled in minute increments, a remaining waiting time of 1 minute is signaled while the vehicle has already arrived at the stop.

Bekannt sind in der Fahrbahn eingelassene Induktionsschleifen, die beim Überfahren zur Auslösung von Aktionen verwendbar sind. Für den Fall der Haltestellen-Display-Ansteuerung dürften sich jedoch erhebliche Hardwareund Softwareprobleme ergeben, da Fahrzeuge verschiedener Linien unterschieden werden müssen. Are known induction loops embedded in the road, which at Run over can be used to trigger actions. In the event of Stop display control, however, are likely to be significant hardware and Software problems arise because vehicles differentiate between different lines Need to become.

Aus der JP 08329388 ist ein Verfahren bekannt, bei dem die Annäherung an eine Haltestelle von einem Funksignal begleitet ist. Dieses schwache Funksignal bewirkt das Erlöscheneiner Anzeigelampe an der Haltestelle.A method is known from JP 08329388 in which the approximation is accompanied by a radio signal at a stop. This weak Radio signal causes an indicator lamp at the bus stop to go out.

Auch der Einsatz einer Funk-Fernsteuerung nach Art einer Vorrang-Umschaltung einer Verkehrsampel ist mit erheblichen Nachteilen verbunden. Die Fahrzeuge müßten mit entsprechenden Sendern und die Haltestellen-Displays mit geeigneten Empfängern ausgestattet werden. Außerdem ist das Problem des richtigen Auslösezeitpunktes für die Absendung des Infrarotsignals damit noch nicht gelöst.The use of radio remote control in the manner of a priority switchover a traffic light is associated with considerable disadvantages. The vehicles would have to have appropriate transmitters and the stop displays be equipped with suitable receivers. Besides that is Problem of the correct triggering time for the transmission of the infrared signal not solved yet.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und ein Ansteuersystem der gattungsgemäßen Art anzugeben, welche auf einfache Weise, zuverlässig und mit ausreichender Genauigkeit eine Um- bzw. Ausschaltung der Wartezeit-Anzeige im Nahbereich der Haltestelle sicherstellen.The invention has for its object a method and a control system of the generic type, which in a simple manner, switching and switching off reliably and with sufficient accuracy the waiting time display in the vicinity of the stop.

Verfahrensgemäß wird die Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Die Erfindung basiert auf der Erkenntnis, daß durch eine Überlagerung der Zentralansteuerung des Haltestellen-Displays durch eine direkte Ansteuerung, die durch das Fahrzeug ausgelöst wird, Toleranzen und Ungenauigkeiten ausgeblendet werden können. Der Fahrgast wird nicht mehr falsch informiert, indem noch eine Wartezeit angezeigt wird, obwohl das Fahrzeug bereits an der Haltestelle eingetroffen ist.According to the method, the task is characterized by the characteristic features of claim 1 solved. The invention is based on the knowledge that through overlaying the central control of the stop display direct control, which is triggered by the vehicle, tolerances and inaccuracies can be hidden. The passenger is no longer misinformed by displaying a waiting time even though the vehicle has already arrived at the stop.

Das Fahrzeug sendet die "Blanking Message" quasi in den Sendepausen zwischen dem durch die Zentrale generierten Funktelegrammen aus. Auf diese Weise wird der gleichzeitige Empfang von Funksignalen der Zentrale und des Fahrzeuges seitens des Haltestellen-Displays vermieden. Die Signalauswertung durch das Haltestellen-Display wird dadurch vereinfacht. Denkbar wäre aber auch die Aussendung eines gegenüber dem Funktelegramm der Zentrale stark dominierenden Fahrzeug-Signals, so das die "Blanking Message" auf jeden Fall erkannt wird. The vehicle quasi sends the "blanking message" during the transmission breaks between the radio telegrams generated by the control center. On this way the simultaneous reception of radio signals from the control center and the vehicle on the part of the stop display avoided. The This simplifies signal evaluation using the stop display. However, it would also be conceivable to send one to the other Radio telegram from the control center of the strongly dominating vehicle signal, so that the "blanking message" is definitely recognized.

Bei der "Window"-Variante gemäß Anspruch 3 wird die zeitliche Synchronisation des Fahrzeug-Signals durch die Merkmale nach Anspruch 2 wesentlich erleichtert. Die "Window Message" signalisiert dem Fahrzeug, daß ein "Window" das heißt eine Sendepause, unmittelbar folgt und die "Blanking Message" ausgesandt werden kann. Dadurch ergibt sich der Vorteil, daß die Funktelegramme nicht notwendig eine konstante Länge aufweisen müssen. Auch die "Window"-Länge kann variabel sein, vorausgesetzt, daß die Länge zum Aussenden der "Blanking Message" ausreichend ist.In the "window" variant according to claim 3, the time synchronization the vehicle signal by the features of claim 2 essential facilitated. The "Window Message" signals to the vehicle that a "Window" means a pause in transmission, immediately follows and the "blanking Message "can be sent out. This has the advantage that the radio telegrams do not necessarily have to be of constant length. The "window" length can also be variable, provided that the Length for sending the "blanking message" is sufficient.

Bevorzugt wird die "Blanking Message" gemäß Anspruch 3 nur generiert, wenn demnächst eine Haltestelle angefahren wird. Der Abstand x3, der durch die an sich relativ grobe Positionsbestimmung durch das Fahrzeug ermittelt wird, ist sicherheitshalber sehr viel größer als die Reichweite x, der "Blanking Message" vorgesehen. Insbesondere bei weit auseinanderliegenden Haltestellen ergeben sich dadurch Vorteile und Einsparungen, da die "Blanking Message" nur ausgesandt wird, wenn eine gewisse Wahrscheinlichkeit besteht, daß überhaupt eine Haltestelle in der Nähe befindlich ist.The "blanking message" is preferably only generated if a stop is soon approached. For safety's sake, the distance x 3 , which is determined by the vehicle's relatively coarse position determination, is much larger than the range x provided by the "blanking message". This results in advantages and savings, in particular in the case of widely spaced-apart stops, since the "blanking message" is only sent out if there is a certain probability that a stop is in the vicinity at all.

Ein in Anspruch 4 gekennzeichnetes Ansteuersystem zeichnet sich durch einfachen und sparsamen Aufbau aus. Eine ohnehin im Fahrzeug zur Kommunikation mit der Zentrale vorgesehene Sendeeinrichtung übernimmt gleichzeitig die Display-Ansteuerfunktion. Eine zusätzliche Ausrüstung ist dadurch weder im Fahrzeug noch im Haltestellen-Display erforderlich.A control system characterized in claim 4 is characterized by simple and economical construction. One in the vehicle anyway Communication with the control center provided transmission device takes over the display control function at the same time. Additional equipment is therefore neither required in the vehicle nor in the stop display.

Die Erfindung wird nachfolgend anhand zweier Figuren näher erläutert. Es zeigen:

  • Figuren 1a und 1b schematische Darstellungen zur Veranschaulichung eines Verfahrens zur Ansteuerung eines Haltestellen-Displays und
  • Figur 2 schematisch eine Ausführungsform für das Zusammenwirken eines Funktelegramms mit einem Haltestellen-Display und einem Fahrzeug.
    • The invention is explained in more detail below with the aid of two figures. Show it:
  • Figures 1a and 1b are schematic representations to illustrate a method for controlling a stop display and
  • Figure 2 schematically shows an embodiment for the interaction of a radio telegram with a stop display and a vehicle.

    • Ein in den Figuren 1 a und 1 b dargestelltes Haltestellen-Display 1 am Ort einer Haltestelle 2 wird von einer Zentrale 3 über Funktelegramme 4 zur Signalisierung der voraussichtlichen Wartezeiten 5 auf Fahrzeuge 6 verschiedener Linien angesteuert. Dazu übermittelt das Fahrzeug 6 seine Koordinaten über eine Funkverbindung 7 an eine Zwischenstation 8, die mit der Zentrale 3 zusammenwirkt. Die Zentrale 3 ermittelt aus den aktuellen Positionsdaten des Fahrzeuges 6 und den bekannten Koordinaten der Haltestelle 2 die voraussichtliche verbleibende Fahrzeit, die der anzuzeigenden Wartezeit 5 entspricht. Wenn der Abstand des Fahrzeuges 6 von der Haltestelle 2 einen bestimmten Wert x3 unterschreitet, beginnt das Fahrzeug 6 mit der Aussendung einer "Blanking Message" 9 geringer Reichweite x1. Der Abstand x3 ist dabei sehr viel größer als die Reichweite x1 der "Blanking Message" gewählt, um sicherzugehen, daß der Streubereich Δx3 auf jeden Fall zu einer rechtzeitigen Aussendung der "Blanking Message" führt.A stop display 1 shown in FIGS. 1 a and 1 b at the location of a stop 2 is controlled by a control center 3 via radio telegrams 4 to signal the expected waiting times 5 for vehicles 6 of different lines. For this purpose, the vehicle 6 transmits its coordinates via a radio link 7 to an intermediate station 8, which interacts with the control center 3. The control center 3 uses the current position data of the vehicle 6 and the known coordinates of the stop 2 to determine the expected remaining travel time, which corresponds to the waiting time 5 to be displayed. If the distance of the vehicle 6 from the stop 2 falls below a certain value x 3 , the vehicle 6 starts sending a "blanking message" 9 of short range x 1 . The distance x 3 is chosen to be much larger than the range x 1 of the "blanking message" in order to ensure that the scattering range Δx 3 in any case leads to a timely transmission of the "blanking message".

    Figur 1b zeigt eine Position des Fahrzeuges 6, bei der eine durch die "Blanking Message" 9 ausgelöste Umschaltung der Wartezeit-Anzeige 5 auf "Blanking" 5a erfolgt. Die Reichweite x1 der "Blanking Message" ist etwas größer als der Umschaltabstand x2 des Fahrzeuges 6 von der Haltestelle 2. Die Zeitverzögerung zwischen x1 und x2 ergibt sich aus der Struktur der Funktelegramme 4, die von der Zentrale 3 generiert werden.FIG. 1b shows a position of the vehicle 6 in which the waiting time display 5 is switched to "blanking" 5a, triggered by the "blanking message" 9. The range x 1 of the "blanking message" is slightly larger than the switching distance x 2 of the vehicle 6 from the stop 2. The time delay between x 1 and x 2 results from the structure of the radio telegrams 4 that are generated by the control center 3.

    Figur 2 veranschaulicht den strukturellen Aufbau des Funktelegromms 4 im Zusammenwirken mit einer Quittierungseinrichtung 10 des Haltestellen-Displays 1 und dem Fahrzeug 6. Das Funktelegramm 4 besteht im wesentlichen aus Datensätzen 11, die für das Haltestellen-Display 1 zur Visualisierung der Wartezeit (5) vorgesehen sind, und einer "Window Message" 12 quasi als Markierung des Funktelegrammendes. Die "Window Message" 12 wird von dem Fahrzeug 6 empfangen, wodurch ein Sendebefehl für die Aussendung der "Blanking Message" 9 zum Haltestellen-Display 1 ausgelöst wird. Die "Blanking Message" wird durch die "Window Message" 12 derart zum Funktelegramm 4 synchronisiert, daß eine Absendung nur in einer Sendepause, das heißt einem "Window" 13 zwischen den Funktelegrammen 4 erfolgen kann. Durch diese Synchronisation kann sich eine Differenz zwischen dem Abstand x2 des Fahrzeuges 6 von der Haltestelle 2, bei dem die "Blanking Message" 9 generiert wird und der Reichweite x1 der "Blanking Message" 9 ergeben.FIG. 2 illustrates the structural structure of the radio telegram 4 in cooperation with an acknowledgment device 10 of the stop display 1 and the vehicle 6. The radio telegram 4 essentially consists of data records 11 which are provided for the stop display 1 to visualize the waiting time (5) are, and a "window message" 12 as a kind of marking the end of the radio telegram. The "window message" 12 is received by the vehicle 6, whereby a send command for sending the "blanking message" 9 to the stop display 1 is triggered. The "blanking message" is synchronized to the radio telegram 4 by the "window message" 12 in such a way that transmission can only take place during a transmission pause, that is to say a "window" 13 between the radio telegrams 4. This synchronization can result in a difference between the distance x 2 of the vehicle 6 from the stop 2 at which the "blanking message" 9 is generated and the range x 1 of the "blanking message" 9.

    in der in Figur 1b dargestellten Position erfolgt gerade die Umschaltung der Wartezeit-Anzeige 5 für das nächste Fahrzeug 6 der Linie 1 auf "Blanking" 5a.in the position shown in FIG. 1b, the switchover of the Waiting time display 5 for the next vehicle 6 of line 1 for "blanking" 5a.

    Die Erfindung beschränkt sich nicht auf das vorstehend angegebene Ausführungsbeispiel. Vielmehr ist eine Anzahl von Varianten denkbar, welche auch bei grundsätzlich anders gearteter Ausführung von den Merkmalen der Erfindung Gebrauch machen.The invention is not limited to the exemplary embodiment specified above. Rather, a number of variants are conceivable, which even if the features are fundamentally different make use of the invention.

    Claims (4)

    1. Method for controlling at least one stop-place display (1), in which a vehicle (6) transmits its identification and its current position data to a control centre (3), which calculates the expected waiting time (5) until the vehicle (6) arrives at at least one stopping-place (2), and controls the stopping-place display (1) assigned to the respective stopping-place (2) for the purpose of visually indicating this waiting time (5), the vehicle (6) emitting a "blanking message" (9), having a short range x1, which, upon approach of the vehicle (6) to the stopping place (2) to a distance x2 ≤ x1, triggers a switch-over of the stopping-place display (1) to "blanking" (5a), characterized in that the control centre (3) generates radio messages (4), the structure and length of which are defined for the purpose of controlling display fields of the stopping-place display (1) that are assigned to lines, there being provided between the radio messages (4) in each case a "window" (13) in which the vehicle (6) emits the "blanking message" (9).
    2. Method according to claim 1, characterized in that, following each radio message (4), a "window message" (12) is transmitted to the vehicle (6).
    3. Method according to either of the preceding claims, characterized in that the "blanking message" (9) is emitted only when there is a falling below a distance x3 > x1 from the stopping place (2).
    4. Control system according to any one of the preceding claims, characterized in that a transmission device, disposed in the vehicle (6), is provided for the purpose of transmitting the identification and the current position data of the vehicle (6) to the control centre (3) and also for emitting the "blanking message (9).
    EP98440241A 1997-11-27 1998-10-30 Method of controlling at least one stop-display for public transport Expired - Lifetime EP0919978B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19752460A DE19752460A1 (en) 1997-11-27 1997-11-27 Method for controlling at least one stop display
    DE19752460 1997-11-27

    Publications (2)

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    EP0919978A1 EP0919978A1 (en) 1999-06-02
    EP0919978B1 true EP0919978B1 (en) 2004-01-14

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    EP98440241A Expired - Lifetime EP0919978B1 (en) 1997-11-27 1998-10-30 Method of controlling at least one stop-display for public transport

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    US (1) US6177889B1 (en)
    EP (1) EP0919978B1 (en)
    AT (1) ATE257968T1 (en)
    AU (1) AU9241298A (en)
    CA (1) CA2252133A1 (en)
    DE (2) DE19752460A1 (en)
    SG (1) SG74677A1 (en)

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    US9232406B2 (en) * 2002-03-14 2016-01-05 Odyssey Wireless, Inc. Systems and/or methods of data acquisition from a transceiver
    US7057531B1 (en) 2004-01-12 2006-06-06 Anthony Okunuga System for indicating approaching vehicle speed
    WO2007147673A1 (en) * 2006-06-22 2007-12-27 International Business Machines Corporation Method and system for providing information to a transportation vehicle on the presence of passengers
    NL1036495C2 (en) * 2009-02-02 2010-08-03 Vroom Beheer B V DEVICE FOR DISPLAY OF TRAVEL INFORMATION.
    WO2011023460A1 (en) * 2009-08-24 2011-03-03 Siemens Aktiengesellschaft Information system, assembly, data processing device, data display device and method for capturing, processing and/or displaying data on public transportation means
    US8878702B2 (en) 2010-10-18 2014-11-04 Crucs Holdings, Llc Transportation alert application for a mobile communication device
    US9087193B2 (en) * 2012-11-13 2015-07-21 Gogo Llc Communication system and method for nodes associated with a vehicle

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    US4533871A (en) * 1981-08-10 1985-08-06 Dsl Dynamic Sciences Limited Range-enable information system for plural mobile objects
    GB8513377D0 (en) * 1985-05-28 1985-07-03 London Buses Ltd Transportation system
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    DE4003753A1 (en) * 1990-02-08 1991-08-14 Eickhoff Geb Bus stop information system - has on board transmitter to influence display to indicate delay
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    JPH1011699A (en) * 1996-06-24 1998-01-16 Nippon Denki Ido Tsushin Kk Simple bus locating system

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    Publication number Publication date
    US6177889B1 (en) 2001-01-23
    AU9241298A (en) 1999-06-24
    EP0919978A1 (en) 1999-06-02
    CA2252133A1 (en) 1999-05-27
    DE59810587D1 (en) 2004-02-19
    SG74677A1 (en) 2000-08-22
    DE19752460A1 (en) 1999-06-02
    ATE257968T1 (en) 2004-01-15

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