EP2949540B1 - Methode zur messung von interner spannung einer durchgehend geschweisten schiene während der wärmeregelung der schiene - Google Patents

Methode zur messung von interner spannung einer durchgehend geschweisten schiene während der wärmeregelung der schiene Download PDF

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Publication number
EP2949540B1
EP2949540B1 EP15169088.0A EP15169088A EP2949540B1 EP 2949540 B1 EP2949540 B1 EP 2949540B1 EP 15169088 A EP15169088 A EP 15169088A EP 2949540 B1 EP2949540 B1 EP 2949540B1
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EP
European Patent Office
Prior art keywords
rail
measurement
rails
sensors
wheatstone bridge
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.)
Not-in-force
Application number
EP15169088.0A
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English (en)
French (fr)
Other versions
EP2949540A1 (de
Inventor
Lorenzo Stoppini
Valentina Maestroni
Mauro Cassano
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.)
Alpha Caesar Srl
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Alpha Caesar Srl
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Publication of EP2949540A1 publication Critical patent/EP2949540A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
    • B61L23/042—Track changes detection
    • B61L23/044—Broken rails
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
    • B61L23/042—Track changes detection
    • B61L23/047—Track or rail movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
    • B61L23/042—Track changes detection
    • B61L23/048—Road bed changes, e.g. road bed erosion

Definitions

  • CWR continuously welded rail
  • said rail regulation procedure does not include the automatic issue of any document certifying the right execution of the measurement: the accuracy of regulation operations is committed to competence and technical skills of the involved operators, without the possibility of verifying during either the working steps and later the real stretch condition of the rail.
  • the technical object of the present invention is the provision of a reliable rails regulation method not subjected to human error.
  • the technical problem is solved by the features of method claim 1.
  • said method also offers the benefit to be able to issue a certificate upon the end of control procedure.
  • the method is based on the direct measurement of internal rail tensional stress conditions using precision instruments. In this way it is possible to minimize measurement imprecisions, erasing evaluation errors due to operators visual perception.
  • the object of the present invention once applied to the at least twelve predetermined rail points, supplies in continuous exact values of internal stress traction induced by rail stressors to rails. Thanks to this peculiarity, it is possible to interrupt the stress on both semi-sections exactly on reaching the suitable internal tensional condition.
  • the method can automatically release, in the end, a document certifying the exact internal tensional condition of the rail and the accuracy of the thermal regulation, reporting exact information on tensional condition of the rails at the end of the stretching operations.
  • the invention object of the present application is a system composed by several electronic and electro-mechanics equipment belonging to three separate functional groups:
  • Measurement equipment consist of at least twelve electro-mechanical sensors (stress/compression or torsion/cut, bend-type load cells) equipped of strain gauges, installed as an electrical scheme of a Wheatstone bridge, or by an equal number of optical extensometers based on Bragg's filament fiber technology.
  • sensors commonly called charge cells, are present in at least 12 unities ( Fig. 2 - A1, A2, B1, B2, C1, C2, D1, D2, E1, E2, F1, F2) being 12 for wheel-track (6 for each rail) the minimum number required to guarantee the right functioning of the invention.
  • the fixing method of the sensor is entirely mechanic and is done, preferably, through a joint friction created between the sleeper of the rail and the sensor or through another appropriate fixing system. The obtained joint friction is made through appropriate mechanical clamping. Said fixing method allows to made in-built the sensors application points to the rail sleeper without damaging or disturbing the structure of the rail or of the track.
  • the sensors installed along the rail are connected via cable in couples (one for right rail and one for left rail), to the first elaboration and data transmission apparatuses (one for each couple) ( Fig. 2 - H1, H2, H3, H4, H5, H6) composed by a container, e.g. a PVC or metal one (minimum degree of protection to water and dusts IP65), inside which the following described electronics apparatuses are installed.
  • a container e.g. a PVC or metal one (minimum degree of protection to water and dusts IP65), inside which the following described electronics apparatuses are installed.
  • the container will have properly shaped holes to allow the fixing of two panel connectors for the wiring of cables coming from the sensors, a panel switch activating a status led allowing the switching-on of the electronic apparatuses and then the feeding of the sensors, a panel connector for bipolar jack plug allowing the recharge from outside of the inside container battery, a USB panel connector allowing the connection between the electronic apparatuses and a PC during the system periodic maintenance operations, one high gain antenna allowing the long length data transmission, preferably via radio.
  • electronic apparatuses inside the container include a rechargeable battery of proper amperage, preferably allowing an autonomy of at least 8 hours, an electronic circuitry with micro-controller able to receive sensors' amplified stress or related Digit through analogic or digital doors. Signals, codified for the identification of every single cell, are converted in a numeric value and sent through a serial communication to a second electronic circuitry which will take care of data transmission, either via cable or via ether, to final data elaboration apparatuses.
  • the final data elaboration and final certification issue apparatuses are composed by a container, preferably a PVC or metal one (minimum degree of protection to water and dusts IP65), inside which the electronic apparatuses described here below are installed.
  • the container will have properly shaped holes to allow the fixing of one USB panel connector allowing the connection between electronic apparatuses and a PC ( Fig. 2 - PC), one high gain antenna to allow long distance data receiving.
  • electronic apparatuses inside the container include an electronic circuitry which takes care of data reception from apparatuses placed on those twelve points above described and placed along the rail. Data are then transferred preferably via USB cable to a laptop to be elaborated through a proper dedicated software.
  • the data elaboration software has been properly studied to elaborate all data received by sensors, parameterize and verify them upon specific technics effective in matter of rail thermal regulation issued by the Authority of the rail infrastructure.
  • the software will collect all basic information needed for filling the final prospect of the regular execution certificate, will check data sent by sensors and will verify the accuracy of rails regulation operations.
  • the interface shows markers (one for each sensor) visualizing in real time rails tensional stress status.
  • results of the completed thermal regulation are showed and the certification form of the completed execution of thermal regulation is saved as a non-modifying electronic output. Once memorized in a specific directory located into pc's hard disk, the file is available for the operator to be printed and signed.
  • One more encrypted file saved on a hidden directory, containing all input data, of both process and output, is available for infrastructure's manager in case of further verifications of the made work.
  • Radio communication can make use of any commonly used protocol.
  • it is preferably used a transfer protocol based on standard IEEE802.15.4, in order to guarantee the possibility of creation of a WPAN (Wireless Personal Area Network).
  • the used transmission protocol works into radio frequencies reserved for industrial, scientific and medical aims (ISM), e.g. 868 Mhz in Europe, 915 Mhz in the USA and 2,4 Ghz for larger part of the rest of the world.
  • measurement apparatuses A1, A2, B1, B2, C1, C2, D1, D2, E1, E2, F1, F2 in position by points PF, PL1 e PL2. Later, measurement apparatuses are connected via cable to transmission apparatuses H1, H2, H3, H4, H5, H6 which are fed.
  • apparatus H7 is connected to a PC and both are fed.
  • Fig. 1 represents a functional scheme of the invention giving a line on different types of apparatuses for use in the invention.
  • section A and section B apparatuses suggest that communication between them is made via cable, but is not excluded the possibility that said transmission could be made via radio.
  • the number of the represented apparatuses is not binding: in configurations for use with the invention a higher or lower number of apparatuses can be used as appropriate.
  • Fig. 2 represents an implementation scheme of the invention in its standard configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Claims (6)

  1. Verfahren zur Messung der Zugspannung von Schienen, die sich während der thermischen Regelung einer Schiene mit durchgehend geschweißten Schienen bewegen können, wobei die Messung der Zugspannung innerhalb der Schienen durch mindestens 12 Sensoren (A1, A2 ... F1 F2) Messen der Spannung in den Schienen an beiden Enden der Schienen, wobei die Sensoren an den Schienen durch eine Gelenkreibung befestigt sind, die zwischen Schwellen der Schiene und dem Sensor durch mechanische Klemmung erzeugt wird, wobei die Messung der Zugspannung durch die Sensoren, die mit den Dehnungsmeßstreifen ausgestattet sind, die in dem Sensor gemäß dem elektrischen Schema einer Wheatstone-Brücke installiert sind, und wobei die Dehnungsmeßstreifen aus den folgenden Typen ausgewählt sind: Zug und Druck, Biegung, Torsion und Schnitt.
  2. Verfahren nach Anspruch 1, wobei die Wheatstone-Brücke aus einer ganzen Wheatstone-Brücke, einer halben Wheatstone-Brücke und einer viertel Wheatstone-Brücke ausgewählt ist.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Messung der Zugspannung durch die Verwendung von optischen Dehnungsmeßstreifen erfolgt, die auf der Bragg-Filament-Fasertechnologie basieren.
  4. Verfahren nach den Ansprüchen 1 bis 3, ferner umfassend die Temperaturmessung durch Sensoren, die mit Dehnungsmessstreifen ausgestattet sind, die gemäß dem elektrischen Schema einer Wheatstone-Brücke installiert sind.
  5. Verfahren nach den Ansprüchen 1 bis 4, das weiterhin eine Datenübertragung von Sensoren (A 1, A2 ... F 1, F2) zu einer ersten Verarbeitungseinrichtung (H1... H6) und die Übertragung von der ersten Verarbeitungseinrichtung zu einem Endverarbeitungsgeräte (H7 + PC).
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Datenübertragung von einer ersten Verarbeitungseinrichtung (H1 ... H6) zu einer Endverarbeitungseinrichtung (H7 + PC) per Funk erfolgt, vorzugsweise bei einer Wellenlänge ausgewählt aus Mikrowelle, Kurzwelle, Mittelwelle und lange Welle .
EP15169088.0A 2014-05-26 2015-05-25 Methode zur messung von interner spannung einer durchgehend geschweisten schiene während der wärmeregelung der schiene Not-in-force EP2949540B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITLO20140003 2014-05-26

Publications (2)

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EP2949540A1 EP2949540A1 (de) 2015-12-02
EP2949540B1 true EP2949540B1 (de) 2018-08-22

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EP15169088.0A Not-in-force EP2949540B1 (de) 2014-05-26 2015-05-25 Methode zur messung von interner spannung einer durchgehend geschweisten schiene während der wärmeregelung der schiene

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4155164A1 (de) * 2021-09-24 2023-03-29 ALSTOM Holdings Verfahren, system und softwarecode zur schätzung temperaturbezogener kräfte in eisenbahnstrecken

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6791082B2 (ja) 2017-09-27 2020-11-25 株式会社ダイフク 監視システム

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7245217B2 (en) * 2004-03-06 2007-07-17 Fibera, Inc. Hazard mitigation for railway track intrusions at train station platforms
US7869909B2 (en) * 2004-07-26 2011-01-11 Harold Harrison Stress monitoring system for railways

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4155164A1 (de) * 2021-09-24 2023-03-29 ALSTOM Holdings Verfahren, system und softwarecode zur schätzung temperaturbezogener kräfte in eisenbahnstrecken

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