US20120029740A1 - Method and device for monitoring speed - Google Patents

Method and device for monitoring speed Download PDF

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Publication number
US20120029740A1
US20120029740A1 US13262697 US201013262697A US2012029740A1 US 20120029740 A1 US20120029740 A1 US 20120029740A1 US 13262697 US13262697 US 13262697 US 201013262697 A US201013262697 A US 201013262697A US 2012029740 A1 US2012029740 A1 US 2012029740A1
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Patent type
Prior art keywords
speed
signal
rail vehicle
device
track
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.)
Abandoned
Application number
US13262697
Inventor
Ulrich Bock
Bernhard Evers
Lars Schnieder
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Siemens AG
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Siemens 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.)
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00Recording or indicating positions or identities of vehicles or vehicle trains or setting of track apparatus
    • B61L25/02Indicating or recording positions or identities of vehicles or vehicle trains
    • B61L25/021Measuring and recording of train speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
    • B61L1/02Electric devices associated with track, e.g. rail contacts
    • B61L1/10Electric devices associated with track, e.g. rail contacts actuated by electromagnetic radiation; actuated by particle radiation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal
    • B61L3/02Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
    • B61L3/12Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
    • B61L3/125Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using short-range radio transmission

Abstract

A method and a corresponding device enable monitoring the speed of rail vehicles. In order to enable a reduction and simplification of the required system components and a speed monitoring that is not only intermittent, it is provided that the rail vehicle emits a signal, the propagation time of which is evaluated on the track side with regard to the speed. The evaluated signal is transmitted back to the rail vehicle.

Description

  • The invention relates to a method for monitoring the speed of rail vehicles and to a device relating thereto.
  • Speed monitoring devices serve usually to regulate the speed of the rail vehicle to a setpoint value and/or to trigger forced braking when a maximum permissible speed is exceeded. The maximum permissible speeds are frequently track-specific maximum speeds, for example on sections of track with a negative gradient, bends in the track with small radii, dead-end tracks or train reversing installations as well as tracks with shortened overlaps. For this purpose, two partial functions are to be implemented, specifically measurement and evaluation of the approach speed of the rail vehicle to a track-side device, and transmission of a braking instruction to the rail vehicle when the speed is over excessive.
  • FIG. 1 illustrates a typical configuration of a known design for solving this problem. The track-side device is composed here of a train stop 1, for example on the basis of inductively acting coupling coils or magnetically, electro-mechanically or mechanically acting contacts, and a preceding measurement track 2 with two measurement points 3 and 4, for example on the basis of inductively acting wheel sensors. The rail vehicle 5 is equipped with a device 6 which detects the activation state or deactivation state of the track-side train stop 1 when it travels over it. In the basic position, the train stop 1 is always activated and therefore brings about forced braking of the rail vehicle travelling over it. The measurement and evaluation of the speed is based on the defined distance between the two measurement points 3 and 4 and the determined time interval between the pulses which are recorded by the measurement points 3 and 4. The speed which is determined is compared with the maximum permissible track speed, wherein the train stop 1 is deactivated only if the speed which is determined is less than or equal to the maximum speed. When the maximum speed is exceeded, the train stop 1 remains active and therefore brings about forced braking by interacting with the rail-vehicle-side device 6. A disadvantage with this known speed measuring device, in addition to the considerable expenditure on the sensor system, is in particular the principle of measuring at specific times.
  • The invention is based on the object of disclosing a method and a device which permits simpler and at the same time more continuous measurement of speed.
  • According to the method, the object is achieved in that the rail vehicle emits a signal whose propagation time is evaluated on the track side with respect to the speed, and in that the evaluated signal is transmitted back to the rail vehicle.
  • A device according to claim 4 for carrying out the method has for this purpose a vehicle device with a transmitter/receiver module and a track-side device with a receiver/transmitter module, wherein the track-side device has an evaluation unit for evaluating the speed of a signal which is received by the transmitter/receiver module of the vehicle device.
  • In this way, it is possible to monitor speed even without using the conventional, cost-intensive track-side sensor system. Positionally fixed measuring points and the associated cabling are dispensed with. A train stop with the associated cabling is also dispensed with by virtue of the possibility of bidirectional signal transmission. Significantly fewer track-side components are required, said components being particularly susceptible to wear owing to mechanical, climatic and biological/chemical environmental conditions.
  • According to claim 2, an RFID—radio frequency identification—signal is emitted, evaluated and transmitted back. The propagation time of the RFID signal, which constitutes a measure of the distance and therefore a measure of the speed in its variation over time, can be conveniently determined with extremely high accuracy. As a result, continuous measurement of speed and continuous transmission of a response signal back to the rail vehicle to be monitored are possible. Furthermore, it is advantageous that an RFID vehicle device can be used both for scheduled train operations and for special journeys, for example construction vehicles which do not usually travel on the tracks. A portable design of the vehicle device also allows it to be carried by small units. By virtue of the portability of the vehicle device, there is also the possibility of issuing it before the train travels into the track section which is to be monitored for excess speed and of taking it back or deactivating it at the end of this track section. Furthermore, it is also conceivable to use the device as a fall back level, for main lines or else for temporary track closures, making travel on only one track possible, due, for example, to engineering work. It is also advantageous here that the track-side device can also be embodied in a positionally variable fashion. The positioning of the vehicle-side and track-side RFID components does not require precise orientation between an RFID transmitter/receiver module on the rail vehicle and an RFID receiver/transmitter module on the track. Moreover, the robustness and small size of RFID components are also advantageous when carrying out speed measurements using said components, significantly facilitating temporary use according to the requirements.
  • According to claim 3, when a maximum permissible speed is exceeded, a signal which triggers forced braking is preferably transmitted back to the rail vehicle. For safety reasons, forced braking is necessary only at an excessive speed, with the result that it is possible to dispense with the transmission back of signal when the speed is adapted.
  • The invention will be explained in more detail below with reference to figurative illustrations, in which:
  • FIG. 1 shows a device for monitoring speed of a known design, and
  • FIG. 2 shows a device for monitoring speed according to the invention.
  • In FIG. 2, the assemblies, which are identical for the known device for monitoring speed which is illustrated in FIG. 1 and explained above, are characterized by the same reference symbols. It is apparent that a measurement track 2 (FIG. 1) which is installed on the track side by means of fixed measuring points 3 and 4 (FIG. 1) and is connected by cable to a train stop 1 is absent. Instead, a vehicle device 7 is provided with a transmitter/receiver module using transponder/reader technology which emits RFID signals 8, which are received by a track-side device 9 with a receiver/transmitter module using transponder/reader technology, and are evaluated with respect to the vehicle speed. The evaluation is carried out in such a way that a speed which is derived from the propagation time of the signals 8 is compared with a maximum permissible speed. An evaluation unit 10 of the track-side device 9 is used for this. If the maximum permissible speed is exceeded, an RFID response signal 11 is generated, which contains a command to trigger forced braking and is transmitted to the vehicle device 7.
  • In this way, the current speed is not only measured at a specific point—as in the case of the device for monitoring speed according to FIG. 1—but rather continuously. The transmission of a command for forced braking to the rail vehicle 5 also takes place continuously and not only when the vehicle travels over a train stop 1 (FIG. 1). This not only simplifies the system components and reduces their number but also increases the reliability to the overall system for monitoring speed.

Claims (5)

  1. 1-4. (canceled)
  2. 5. A method for monitoring the speed of a rail vehicle, the method which comprises:
    emitting a signal from the rail vehicle;
    receiving the signal trackside and evaluating a propagation time of the signal on the trackside with respect to a speed of the rail vehicle; and
    transmitting the evaluated signal back to the rail vehicle.
  3. 6. The method according to claim 5, wherein the signal is a radio frequency identification RFID signal, and the RFID signal is emitted, evaluated, and transmitted back to the rail vehicle.
  4. 7. The method according to claim 5, which comprises, if the signal indicates that a maximum permissible speed is exceeded, transmitting a signal back to the rail vehicle that triggers forced braking of the rail vehicle.
  5. 8. A system for carrying out the method according to claim 5, comprising:
    a vehicle device with a transmitter/receiver module;
    a trackside device with a receiver/transmitter module, said trackside device having an evaluation unit connected to said receiver/transmitter module for evaluating a signal received from said transmitter/receiver module with regard to a speed of the rail vehicle.
US13262697 2009-04-01 2010-03-30 Method and device for monitoring speed Abandoned US20120029740A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE200910015540 DE102009015540A1 (en) 2009-04-01 2009-04-01 Method and device for speed monitoring
DE102009015540.6 2009-04-01
PCT/EP2010/054146 WO2010112477A1 (en) 2009-04-01 2010-03-30 Method and device for monitoring speed

Publications (1)

Publication Number Publication Date
US20120029740A1 true true US20120029740A1 (en) 2012-02-02

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US13262697 Abandoned US20120029740A1 (en) 2009-04-01 2010-03-30 Method and device for monitoring speed

Country Status (7)

Country Link
US (1) US20120029740A1 (en)
EP (1) EP2414209A1 (en)
KR (1) KR101367079B1 (en)
CN (1) CN102365197A (en)
DE (1) DE102009015540A1 (en)
RU (1) RU2483325C1 (en)
WO (1) WO2010112477A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150329130A1 (en) * 2013-09-03 2015-11-19 Metrom Rail, Llc Rail Vehicle Signal Enforcement and Separation Control

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2971473B1 (en) * 2011-02-15 2013-03-08 Systerel Device for detection, METHOD and safe system for detecting the presence of RFID detection on a track, in particular a rail.

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EP0233017A2 (en) * 1986-02-01 1987-08-19 Westinghouse Brake And Signal Holdings Limited Automatic railway vehicle operation
US5437422A (en) * 1992-02-11 1995-08-01 Westinghouse Brake And Signal Holdings Limited Railway signalling system
US5420883A (en) * 1993-05-17 1995-05-30 Hughes Aircraft Company Train location and control using spread spectrum radio communications
US20050234757A1 (en) * 1994-09-01 2005-10-20 Matheson William L System and method for scheduling and train control
US20030105560A1 (en) * 2001-12-04 2003-06-05 Yoichi Sugita Train control method and apparatus
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US20040267415A1 (en) * 2003-06-27 2004-12-30 Alstom Method and apparatus for controlling trains, in particular a method and apparatus of the ERTMS type
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Publication number Priority date Publication date Assignee Title
US20150329130A1 (en) * 2013-09-03 2015-11-19 Metrom Rail, Llc Rail Vehicle Signal Enforcement and Separation Control
US9731738B2 (en) * 2013-09-03 2017-08-15 Metrom Rail, Llc Rail vehicle signal enforcement and separation control

Also Published As

Publication number Publication date Type
DE102009015540A1 (en) 2010-10-14 application
CN102365197A (en) 2012-02-29 application
RU2011144148A (en) 2013-05-10 application
KR20110139763A (en) 2011-12-29 application
RU2483325C1 (en) 2013-05-27 grant
EP2414209A1 (en) 2012-02-08 application
KR101367079B1 (en) 2014-02-24 grant
WO2010112477A1 (en) 2010-10-07 application

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Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BOCK, ULRICH;EVERS, BERNHARD;SCHNIEDER, LARS;SIGNING DATES FROM 20110906 TO 20110927;REEL/FRAME:027055/0602