DE2924190A1 - Monitoring presence, wt. etc. of railway vehicles - by using piezoelectric transducer mounted between rail foot and support block - Google Patents

Monitoring presence, wt. etc. of railway vehicles - by using piezoelectric transducer mounted between rail foot and support block

Info

Publication number
DE2924190A1
DE2924190A1 DE19792924190 DE2924190A DE2924190A1 DE 2924190 A1 DE2924190 A1 DE 2924190A1 DE 19792924190 DE19792924190 DE 19792924190 DE 2924190 A DE2924190 A DE 2924190A DE 2924190 A1 DE2924190 A1 DE 2924190A1
Authority
DE
Germany
Prior art keywords
rail
piezoelectric transducer
railway vehicles
piezoelectric
support block
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
DE19792924190
Other languages
German (de)
Other versions
DE2924190C2 (en
Inventor
Horst Ing Grad Hohmann
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.)
Siemens AG
Original Assignee
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.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE19792924190 priority Critical patent/DE2924190C2/en
Publication of DE2924190A1 publication Critical patent/DE2924190A1/en
Application granted granted Critical
Publication of DE2924190C2 publication Critical patent/DE2924190C2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/04—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles
    • G01G19/042—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles having electrical weight-sensitive devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/02—Electric devices associated with track, e.g. rail contacts
    • B61L1/025—Electric devices associated with track, e.g. rail contacts actuated by variation of resistance or by piezoelectricity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
    • G01G3/13—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing having piezoelectric or piezoresistive properties

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Abstract

The arrangement for determining the presence and/or the wt. of railway vehicles employs a piezoelectric transducer mounted on the track and activated by a vehicle passing along the track. The transducer signals useful component is sufficiently larger than the noise level to permit viable results to be obtained. The piezoelectric transducer (7) is mounted beneath the rail (1) between the foot of the rail and a block supporting the rail. The support block may consist of a sleeper (4). The piezoelectric transducer may be placed in an upward opening cut-out (6) in a rail carrier plate (3) via which the rail is mounted on the sleeper (4). The use of several such transducers would permit vehicle direction, speed, and acceleration to be also measured.

Description

Einrichtung zum Feststellen der Anwesenheit und/oderDevice for determining the presence and / or

des Gewichtes von Eisenbahnfahrzeugen Die Erfindung bezieht sich auf eine Einrichtung zum Feststellen der Anwesenheit rn/oder des Gewichtes von Eisenbahnfahrzeugen unter Verwendung eines an den Schienen angeordieten, durch die auf den Schienen geführten Eisenbahnfahrzeuge betätigbaren piezoelektrischen Gebers.the weight of railway vehicles The invention relates to a device for determining the presence of / or the weight of railway vehicles using one on the rails, through which on the rails guided railway vehicles actuatable piezoelectric encoder.

Derartige Einrichtungen sind bekannt. So zeigt z.B. die DE-PS 822 019 eine Meßeinrichtung zur Feststellung des Gewichtes von Eisenbahnfahrzeugen, bei der unterhalb einer Fahrschiene zwischen den Schwellen ein piezoelektrischer Körper angeordnet ist, der bei zunehmendem Druck seinen elektrischen Widerstand ändern soll. Der piezoelektrische Geber spricht auf die Durchbiegung der Fahrschiene beim Darüberlaufen eines Fahrzeugrades an und iiefert an seinem Ausgang ein elektrisches Signal, dessen Amplitude dem Achsgewicht des den Geber passierenden Fahrzeugs entspricht. Auf den piezoelektrischen Geber wirkt dabei nur ein Bruchteil des tatsächlichen Achsgewichtes, weil der überwiegende Teil der auf die Fahrschienen wirkenden Kräfte durch die starre und unnachgiebige Auflagerung des Fahrgleises zu beiden Seiten des Gebers aufgenommen wird.Such devices are known. For example, DE-PS 822 019 a measuring device for determining the weight of railway vehicles, in the case of the below a running rail between the sleepers a piezoelectric Body is arranged, which with increasing pressure its electrical resistance should change. The piezoelectric transmitter responds to the deflection of the rail when a vehicle wheel runs over it and delivers an electrical one at its output Signal, the amplitude of which corresponds to the axle weight of the vehicle passing the encoder. Acts on the piezoelectric encoder only a fraction of the actual axle weight, because the majority of it is on the running rails acting forces due to the rigid and unyielding support of the track is recorded on both sides of the encoder.

Eine andere Anordnung eines piezoelektrischen Gebers zum Ermitteln der Vorbeibewegung eines Fahrzeugs an einer an einer Schiene befindlichen Meßstelle ist in der DE-OS 1 808 242 angegeben. Dort ist der Geber in einer Halterung zwischen der Unterseite des Schienenoberteiles und der Oberseite des Schienenfußes angebracht. Wenn eine Radachse eines Fahrzeugs über diejenige Stelle der Schiene hinwegläuft, an der die das piezoelektrische Element tragende Halterung angebracht ist, wird das Gewicht des betreffenden Fahrzeugs über das Rad auf das Oberteil der Schiene übertragen. Den größten Teil der auf den Schienenoberteil ausgeübten Belastung trägt der Schienensteg; ein Teil der Belastung wird jedoch auf die das piezoelektrische Element tragende Halterung übertragen, die ihrerseits durch Formänderung auf den piezoelektrischen Geber wirkt undXdamit am Ausgang des Gebers ein das Vorüberlaufen eines Fahrzeugrades charaktersisierendes Signal auslöst.Another arrangement of a piezoelectric transmitter for determining the movement of a vehicle past a measuring point on a rail is given in DE-OS 1 808 242. There the encoder is in a holder between attached to the underside of the rail top and the top of the rail foot. If a wheel axle of a vehicle runs over that point on the rail, to which the bracket carrying the piezoelectric element is attached the weight of the vehicle in question via the wheel on the upper part of the rail transfer. Most of the load exerted on the upper part of the rail bears the rail web; however, some of the stress is placed on the piezoelectric Transfer element-bearing bracket, in turn by changing the shape of the Piezoelectric encoder acts andXthereby at the output of the encoder a passing by of a vehicle wheel triggers a characterizing signal.

Auch bei dieser bekannten Anordnung wird nur ein Bruchteil der insgesamt durch das Achsgewicht eines vorüberlaufenden Fahrzeugs verfügbaren Kraft für das Herleiten eines Meß- bzw. Meldesignals ausgenutzt, weil der überwiegende Teil dieser Kraft inden Widerlagern der Schiene absorbiert wird. Durch Schwingungen in den Fahrschienen beim Herannahen oder beim sich Entfernen von Fahr zeugen kann es vorkommen, daß die piezoelektrischen Ge- ber bereits bzw. noch so stark beeinflußt werden, daß sie an ihrem Ausgang Signale abgeben, die durchaus in der gleichen Größenordnung wie beim Vorüberlaufen eines Fahrzeugrades liegen können. Damit ist ein genügend großer Abstand zwischen einem durch Schwingungen erzeugten Störsignal und einem beim Befahren des Gebers ausgelösten Nutzsignal nicht gegeben.Even with this known arrangement, only a fraction of the total power available for the Deriving a measurement or reporting signal exploited because the majority of these Force is absorbed in the abutments of the rail. Due to vibrations in the running rails when approaching or moving away from driving testify it can happen that the piezoelectric About already or no matter how strongly influenced that they emit signals at their output that are of the same order of magnitude like when a vehicle wheel passes by. That is enough large distance between an interference signal generated by vibrations and a The useful signal triggered when driving over the encoder is not given.

Aufgabe der vorliegden Erfindung ist es, eine Einrichtung zum Feststellen der Anwesenheit und/oder des Gewichtes von Eisenbahnfahrzeugen anzugeben, deren aktives Element aus einem an der Fahrschiene angeordneten piezoelektrischen Geber besteht und die die durch die Verwendung derartiger Geber erzielbaren Ergebnisse dadurch betrieblich verwertbar macht, daß sie einen genügend hohen Abstand zwischen Stör- und Nutzsignal aufweist.The object of the present invention is to provide a device for determining indicate the presence and / or weight of railway vehicles, their Active element from a piezoelectric transmitter arranged on the running rail exists and the results that can be achieved by using such donors thereby makes operationally usable that they have a sufficiently large distance between Has interference and useful signal.

Diese Aufgabe wird durch die Erfindung dadurch gelöst, daß der piezoelektrische Geber unterhalb der Fahrschiene zwischen dem Schienenfuß und einem die Schiene abstützenden Widerlager angeordnet ist. Eine besonders vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der piezoelektrische Geber in einer nach oben offenen Ausnehmung einer die Schiene aufnehmenden Tragplatte angeordnet ist, über die die Schiene auf dem Widerlager, z.B. einer Schwelle, aufliegt.This object is achieved by the invention in that the piezoelectric Encoder below the running rail between the rail foot and one supporting the rail Abutment is arranged. A particularly advantageous embodiment of the invention provides that the piezoelectric transmitter is in a recess that is open at the top a support plate receiving the rail is arranged, over which the rail is mounted the abutment, e.g. a threshold.

Die Erfindung ist nachstehend an Hand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert.The invention is illustrated below with reference to one in the drawing Embodiment explained in more detail.

Die Zeichnung zeigt in einer Schnittdarstellung eine Fahrschiene 1 normaler Bauart im Bereich einer Beein- flussungsstelle mit einem darauf geführten Fahrzeugrad 2 eines Eisenbahnfahrzeugs. Die Fahrschiene 1 ruht auf der Tragplatte 3, die ihrerseits auf einer Schwelle 4 befestigt ist. Die Tragplatte 3 ist mit nach oben vorstehenden Führungselementen 5 versehen, die ein Auswandern der Fahrschiene 1 quer zur Fahrrichtung verhindern sollen; an den Führungselementen können Klammern oder Druckfedern befestigt sein, die dafür sorgen, daß die Fahrschiene 1 sich nicht nach oben hin von der Tragplatte 3 lösen kann. Unterhalb der Fahrschiene ist die Tragplatte mit einer nach oben offenen Ausnehmung 6 versehen, in die ein piezoelektrischer Geber 7 eingesetzt ist. Dieser piezoelektrische Geber ist so ausgebildet, daß er die bei allen vorkommenden Wagengewichten auftretenden Radkräfte von bis zu 100 kN aufnehmen kann, ohne mechanisch Schaden zu nehmen. Diese Kräfte liegen deutlich über den Werten, die von auftretenden Schwingungen in der Schiene auf die Unterlage erzeugt werden, so daß nunmehr ein genügend großer Abstand zwischen Stör- und Nutzsignal gegeben ist. Die nach der Erfindung ausgestaltete Einrichtung läßt sich ohne Schwierigkeiten auch nachträglich an bereits verlegten Gleisen anbringen.The drawing shows a running rail 1 in a sectional view normal design in the area of an impairment flow point with a on it guided vehicle wheel 2 of a railway vehicle. The running rail 1 is at rest on the support plate 3, which in turn is attached to a sleeper 4. The support plate 3 is provided with upwardly protruding guide elements 5 that prevent migration to prevent the running rail 1 transversely to the direction of travel; on the guide elements brackets or compression springs can be attached to ensure that the rail 1 cannot detach itself from the support plate 3 towards the top. Below the runway the support plate is provided with an upwardly open recess 6 into which a piezoelectric encoder 7 is used. This piezoelectric transmitter is designed in such a way that that he the wheel forces occurring in all occurring car weights of up to can withstand up to 100 kN without being mechanically damaged. These forces lie well above the values that are caused by vibrations occurring in the rail Be created so that there is now a sufficiently large distance between disturbance and useful signal is given. The device designed according to the invention can can also be retrofitted to tracks that have already been laid without difficulty.

Die Anordnung mehrerer Einrichtungen entlang eines Gleises gestattet in an sich bekannter Weise neben dem Feststellen der Anwesenheit und/oder des Gewichtes eines Fahrzeugs auch das Erkennen der Bewegungsrichtung, der Geschwindigkeit sowie der Beschleunigung eines Fahrzeugs im Bereich der Einrichtungen.The arrangement of several devices along one track is permitted in a manner known per se in addition to determining presence and / or weight of a vehicle also the recognition of the direction of movement, the speed as well the acceleration of a vehicle in the area of the facilities.

LeerseiteBlank page

Claims (3)

Patentansprüche 1) Einrichtung zum Feststellen der Anwesenheit und/oder es Gewichtes von Eisenbahnfahrzeugen unter Verwendung eines an den Schienen angeordneten, durch die auf den Schienen geführten Eisenbahnfahrzeuge betätigbaren piezoelektrischen Gebers, d a d u r c h g e k e n n -z e i c h n e t, daß der piezoelektrische Geber (7) unterhalb der Fahrschiene (1) zwischen dem Schienenfuß und einem die Schiene abstützenden Widerlager angeordnet ist.Claims 1) Device for determining the presence and / or it weight of railway vehicles using a mounted on the rails, actuated by the railway vehicles guided on the rails, piezoelectric Encoder, d a d u r g e k e n n -z e i c h n e t that the piezoelectric encoder (7) below the running rail (1) between the rail foot and one of the rails supporting abutment is arranged. 2. Einrichtung nach Anspruch 1, d a d u r c h g e -k e n n z e i c h n e t, daß das Widerlager durch eine Schwelle (4) gebildet ist.2. Device according to claim 1, d a d u r c h g e -k e n n z e i c h n e t that the abutment is formed by a threshold (4). 3. Einrichtung nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t, daß der piezoelektrische Geber in einer nach oben offenen Ausnehmung (6) einer die Schiene aufnehmenden Tragplatte (3) angeordnet s, über die die Schiene auf dem Widerlager aufliegt.3. Device according to claim 1 or 2, d a d u r c h g e k e n n z e i c h n e t that the piezoelectric transmitter is in a recess that is open at the top (6) a support plate (3) which receives the rail and over which the rail rests on the abutment.
DE19792924190 1979-06-15 1979-06-15 Device for determining the presence and / or weight of railway vehicles Expired DE2924190C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792924190 DE2924190C2 (en) 1979-06-15 1979-06-15 Device for determining the presence and / or weight of railway vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792924190 DE2924190C2 (en) 1979-06-15 1979-06-15 Device for determining the presence and / or weight of railway vehicles

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DE2924190A1 true DE2924190A1 (en) 1980-12-18
DE2924190C2 DE2924190C2 (en) 1983-12-08

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752053A (en) * 1984-06-25 1988-06-21 Dsl Dynamic Sciences Limited Railway vehicle motion detector
EP0338553A2 (en) * 1988-04-22 1989-10-25 Carl Schenck Ag Balance for railway vehicles
DE4023745A1 (en) * 1990-07-26 1992-01-30 Pfister Gmbh THRESHOLD TO SUPPORT RAILWAY RAILS
WO1996007577A1 (en) * 1994-09-10 1996-03-14 Daimler-Benz Aktiengesellschaft Method of monitoring railway traffic and railway tracks
DE102005020770B3 (en) * 2005-05-02 2006-12-14 Siegfried Pieper Force plate
DE102008005538A1 (en) * 2008-01-22 2009-07-23 Siemens Aktiengesellschaft Method for monitoring unloading process of vehicle that is to be unloaded, involves monitoring momentary deformation of vehicle after positioning vehicle in unloading position
CN102101484A (en) * 2010-12-27 2011-06-22 深圳思量微系统有限公司 Novel unit structure for monitoring track axle
RU2455183C1 (en) * 2011-03-14 2012-07-10 Открытое акционерное общество "Научно-исследовательский и проектно-конструкторский институт информатизации, автоматизации и связи на железнодорожном транспорте" (ОАО "НИИАС") Track device to convert mechanical power into electric power
RU2459735C2 (en) * 2008-02-06 2012-08-27 Инноватек Лтд. Device, system and method for power collection from tracks
GB2499602A (en) * 2012-02-21 2013-08-28 Abmech Design And Analysis Ltd Load measuring elastomeric rail pad
DE102014213761A1 (en) * 2014-07-15 2016-01-21 Siemens Aktiengesellschaft Device for detecting a road user on a traffic route, path with such a device, rail track with such a device and method for measuring force effects on a traffic route
RU209952U1 (en) * 2021-11-24 2022-03-24 общество с ограниченной ответственностью "Инженерный центр "АСИ" (ООО "ИЦ "АСИ") Weight rail lining

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE822019C (en) * 1949-11-10 1951-11-22 Siemens & Halske A G Measuring device for determining the weight of railway vehicles
DE2356120A1 (en) * 1972-11-13 1974-05-22 Acec RAIL CONTACT, IN PARTICULAR RAILWAY RAIL CONTACT
CH566231A5 (en) * 1973-03-14 1975-09-15 Reliance Electric Co

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE822019C (en) * 1949-11-10 1951-11-22 Siemens & Halske A G Measuring device for determining the weight of railway vehicles
DE2356120A1 (en) * 1972-11-13 1974-05-22 Acec RAIL CONTACT, IN PARTICULAR RAILWAY RAIL CONTACT
CH566231A5 (en) * 1973-03-14 1975-09-15 Reliance Electric Co

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752053A (en) * 1984-06-25 1988-06-21 Dsl Dynamic Sciences Limited Railway vehicle motion detector
EP0338553A2 (en) * 1988-04-22 1989-10-25 Carl Schenck Ag Balance for railway vehicles
DE3813630A1 (en) * 1988-04-22 1989-11-02 Schenck Ag Carl SCALE FOR RAIL VEHICLES
EP0338553A3 (en) * 1988-04-22 1990-12-19 Carl Schenck Ag Balance for railway vehicles
DE4023745A1 (en) * 1990-07-26 1992-01-30 Pfister Gmbh THRESHOLD TO SUPPORT RAILWAY RAILS
WO1996007577A1 (en) * 1994-09-10 1996-03-14 Daimler-Benz Aktiengesellschaft Method of monitoring railway traffic and railway tracks
DE102005020770B3 (en) * 2005-05-02 2006-12-14 Siegfried Pieper Force plate
DE102008005538A1 (en) * 2008-01-22 2009-07-23 Siemens Aktiengesellschaft Method for monitoring unloading process of vehicle that is to be unloaded, involves monitoring momentary deformation of vehicle after positioning vehicle in unloading position
DE102008005538B4 (en) * 2008-01-22 2011-01-20 Siemens Aktiengesellschaft Method for monitoring a discharge process of a vehicle
RU2459735C2 (en) * 2008-02-06 2012-08-27 Инноватек Лтд. Device, system and method for power collection from tracks
CN102101484A (en) * 2010-12-27 2011-06-22 深圳思量微系统有限公司 Novel unit structure for monitoring track axle
RU2455183C1 (en) * 2011-03-14 2012-07-10 Открытое акционерное общество "Научно-исследовательский и проектно-конструкторский институт информатизации, автоматизации и связи на железнодорожном транспорте" (ОАО "НИИАС") Track device to convert mechanical power into electric power
GB2499602A (en) * 2012-02-21 2013-08-28 Abmech Design And Analysis Ltd Load measuring elastomeric rail pad
DE102014213761A1 (en) * 2014-07-15 2016-01-21 Siemens Aktiengesellschaft Device for detecting a road user on a traffic route, path with such a device, rail track with such a device and method for measuring force effects on a traffic route
RU209952U1 (en) * 2021-11-24 2022-03-24 общество с ограниченной ответственностью "Инженерный центр "АСИ" (ООО "ИЦ "АСИ") Weight rail lining

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