EP0835202B1 - Detektiergerät für eine kurzschlussverbindung für einen gleisabschnitt - Google Patents

Detektiergerät für eine kurzschlussverbindung für einen gleisabschnitt Download PDF

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Publication number
EP0835202B1
EP0835202B1 EP96937115A EP96937115A EP0835202B1 EP 0835202 B1 EP0835202 B1 EP 0835202B1 EP 96937115 A EP96937115 A EP 96937115A EP 96937115 A EP96937115 A EP 96937115A EP 0835202 B1 EP0835202 B1 EP 0835202B1
Authority
EP
European Patent Office
Prior art keywords
short circuit
inductance
detection device
rails
circuit
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.)
Expired - Lifetime
Application number
EP96937115A
Other languages
English (en)
French (fr)
Other versions
EP0835202A1 (de
Inventor
Franciscus Antonius Bernardus Maria Van Dommelen
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.)
Railpro BV
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Railpro BV
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Filing date
Publication date
Application filed by Railpro BV filed Critical Railpro BV
Publication of EP0835202A1 publication Critical patent/EP0835202A1/de
Application granted granted Critical
Publication of EP0835202B1 publication Critical patent/EP0835202B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B61L23/06—Control, warning or like safety means along the route or between vehicles or trains for warning men working on the route

Definitions

  • the invention relates to a detection device for a short circuit link to be applied between or across the rails of a section of railway track, comprising a source of electrical energy and a monitoring device connected to the rails for measuring and monitoring the short circuit resistance caused by the short circuit link.
  • the protection of a network of railways by automatic signalling of the presence of trains is generally known.
  • the tracks of the network are divided into electrically insulated sections, which are connected to the so-called track circuiting loop, by which it can be established if there is a train on this section.
  • This track circuiting loop consists of a source of alternating current connected to the rails at one end of the section and a relay (the so-called track circuit relay) connected to the rails at the other end of the section.
  • the alternating current source is short circuited through the train axles, so that less current flows to the relay and thus it drops out.
  • the signal allowing access to this section will go to red and prevent train movements.
  • the object of the invention is to avoid the disadvantages described above and improve safety during work on the track.
  • the electrical energy source is an alternating current source and the monitoring device comprises a resonant circuit and an evaluation device for the evaluation of the resonance produced in the resonant circuit.
  • This system itself can indicate that the short circuit resistance meets the requirements imposed and can provide a local signal of this to the person applying the short circuit. There is a local continuous signal, so that it is not necessary to walk regularly to the signal to check that the signal is at danger, which could easily be forgotten when busy with the work. Safety is thus improved considerably and there is not complete dependence on test protocols.
  • the source of electrical energy provides alternating current, which works together with a resonant circuit in the monitoring device; this allows very low short circuit resistances to be measured reliably.
  • These measurement results are fed to an evaluation device for the evaluation of the resonance produced by the resonant circuit.
  • a resonant circuit it is always observed when this circuit, across which it is measured, is defective. For, both a short circuit and an interruption will be detected.
  • a reliable choice for the frequency of the alternating current source can be made between 15 and 25 kHz. This frequency is preferably 17 kHz.
  • the resonant circuit comprises an inductance and a capacitor in series and is connected at one end to an output terminal of the alternating current source, the other output of which is connected to one rail.
  • the other end of the resonant circuit is connected to the other rail.
  • the inductance is connected to a comparator for the comparison of the inductance output signal with a reference signal.
  • the level of the resonant voltage across the inductance is measured, for which the inductance is preferably connected to the comparator through an RMS converter.
  • an additional reliability is achieved by using an extra selection criterion, i.e. the energy contents.
  • the reliability of the measurement is improved even more by means of a band-pass filter, connected between the inductance and the RMS converter, which filters out interfering frequencies.
  • a pulse generator is provided to control the intermittent switching of the series connection of the alternating current source and the resonant circuit formed by the inductance and capacitor onto the rails, when the comparator is connected to a pulse decoder.
  • the intermittent operation not only saves energy, but by using the pulse generator produces measurements at regular intervals. This frequency can also be used as an additional safety criterion. Moreover, by using the intermittent operation the measurement is insensitive for EM interferences.
  • the detection equipment is also connected to a signalling device that can, if required, provide an external signal.
  • Fig. 1 illustrates the track circuit for section b only, this track circuit consists of an alternating current source W1 whose output terminals are connected at one end of section b to rails S1 and S2 respectively.
  • a track circuit relay R1 is connected to these rails S1 and S2 at the other end of this section.
  • this section has to be made safe or protected reliably. This protection is achieved, by simulating the presence of a train on the section, for which a short circuit link KL is placed across the rails S1 and S2.
  • a track can be short-circuited in the following ways.
  • the invention provides a self-signalling short circuit link, which enables continuous, reliable, local signalling that the conditions for short circuit resistance are being met.
  • Fig. 2 The preferred version of a circuit of a short circuit lance is shown in Fig. 2.
  • Fig. 2 shows a part of a section b with the rails S1 and S2. Between the rails S1 and S2 a short circuit lance KL is fitted.
  • the detection device DT associated with the short circuit lance KL is connected to the rails S1 and S2. While a short circuit lance is shown in the version illustrated, the detection device is also suitable for a short-circuiting cable with rail clamps. This method is used when a short circuit lance cannot be used, as for example, at points systems. It is also possible to check if a stationary (works) train, for example a fitting vehicle, produces an adequate short circuit. In addition, adequate short-circuiting by a short-circuiting cable with magnets can also be checked.
  • the detection device DT has an electrical energy source providing alternating current connected by one terminal to the rail S1.
  • This alternating current source W2 places a nearly constant alternating voltage on the rails S1 and S2.
  • Measurements have shown voltages of various amplitudes and with frequencies up to 5 kHz on the track. OTC sections are also used for protection, using a voltage with a frequency of 10 kHz. Tramways also use frequencies of from 9.5 to 14.5 kHz for train detection. Thus, the measurement frequency must be outside these ranges.
  • the frequency of the alternating current source W2 has therefore been selected as higher than 15 kHz. It is advantageous to select a frequency below 25 kHz for the alternating current source W2, to avoid high frequency problems caused by self inductances and capacities in the system. Seventeen kHz is an exceptionally suitable frequency, it is relatively low and does not occur in the track. Moreover, there are no frequencies in the track that have 17 kHz as a higher harmonic. At the same time there is some tolerance around 17 kHz, this allows standard components to be used.
  • the other output terminal of the alternating current source W2 is connected to the other rail S2 through a resonant circuit, this consists of the inductance L and the capacitor C.
  • a resonant circuit this consists of the inductance L and the capacitor C.
  • the level of the output voltage from the band-pass filter B can be measured and compared with a reference value that has been previously set to correspond to a short circuit that meets the requirements imposed.
  • the output of the band-pass filter B is connected to an RMS converter RMSC, this generates the effective value of the output voltage from the band-pass filter B.
  • the RMS converter output voltage is fed to the comparator CO for comparison with a reference signal REF.
  • the comparator input signal CO will be greater than the reference signal applied to the comparator. A signal will then appear at the comparator output that indicates a safeguarded situation.
  • a switch SW is inserted in the connection between the LC circuit and the rail S2, this is controlled by a pulse generator that is not shown. By means of this switch SW the measurement is performed intermittently. Two measurements per second is a suitable choice. Since the measurement is carried out twice a second the adequacy of the short circuit will also be determined twice a second. If this is the case the pulse detector PD connected to the comparator CO gives a safe signal to the signalling device SJ. The pulse detector will be operated synchronously with the switch SW.
  • the pulsed detection measurement is described below.
  • the measurement circuit consisting of the capacitor C and the inductance L is brought into resonance, this causes an increase in the voltage across the inductance.
  • the level of the voltage increase is a measure of the short circuit value.
  • the voltage across the inductance is measured. It is applied to the input of a 17 kHz band-pass filter, this filters out the 17 kHz signal. Thus, only signals at a frequency of 17 kHz can appear at the output of the band-pass filter.
  • the alternating voltage occurring at the band-pass filter outlet is converted to its RMS value by the RMS converter RMSC.
  • This converter determines the energy content of the 17 kHz voltage appearing across the inductance.
  • the signal from the RMS converter is a direct current voltage whose level corresponds to the actual effective value of the alternating voltage of 17 kHz voltage. Interfering voltages with a frequency of 17 kHz will be reduced to a very low level and later rejected.
  • the RMS converter output signal will also be alternated with the 2 Hz of the pulsed measurement.
  • the RMS value from the converter is applied to the comparator CO and compared within it to the value set in advance for the comparator.
  • the output of the comparator will be high when the measurement voltage is switched on and the short circuit is satisfactory.
  • the comparator output will be low. With a proper short circuit the comparator output will also be alternately high and low.
  • the pulse detector PD is connected to the output of the comparator CO. Only if the output is a square wave can the safe signal be given. All other situations produce an alarm.
  • Pulsed measurement is used for the following reasons:
  • An additional test button will be included in the detection device circuit to test that an alarm signal will be given.
  • connection and attachment of the self-signalling short circuit system and the short circuit lance should only be removed using one unique key.
  • a reliable short circuit measurement is guaranteed by the increase in the voltage across the inductance. This increase only takes place if there is a circuit of sufficiently low ohmic value between the measuring unit, the short circuit lance and the rails.
  • the detection device can possibly be constructed with the additional feature of indicating that the short circuit is unsatisfactory or that the measuring unit is defective.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Protection Of Static Devices (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Claims (4)

  1. Erfassungseinrichtung (DT) für ein Erfassen eines hinreichenden Kurzschließens einer zwischen den oder über die Schienen (S1, S2) eines Schienengleisabschnitts anzulegenden Kurzschlußverbindung (KL), umfassend eine Quelle elektrischer Energie (W2) und eine Überwachungseinrichtung (L, C, CO), die im Gebrauch für ein Messen und Überwachen des durch die Kurzschlußverbindung hervorgerufenen Kurzschlußwiderstands mit den Schienen verbunden sind, wobei die Quelle elektrischer Energie (W2) eine Wechselstromquelle ist und die Überwachungseinrichtung einen Resonanzschaltkreis (L, C) sowie eine Bewertungseinrichtung (CO) für die Bewertung der in dem Resonanzschaltkreis erzeugten Resonanz umfaßt, wobei der Resonanzschaltkreis eine Reihenschaltung einer Induktivität (L) und eines Kondensators (C) umfaßt, die an einer Seite mit einem Ausgangsanschluß der Wechselstromquelle verbunden ist, deren anderer Ausgangsanschluß im Gebrauch mit der einen Schiene (S1) verbunden ist, und die im Gebrauch an der anderen Seite mit der anderen Schiene (S2) verbunden ist, und wobei die Induktivität mit einem Vergleicher (CO) verbunden ist für einen Vergleich des Ausgangssignals der Induktivität mit einem Referenzsignal (REF).
  2. Erfassungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Induktivität über einen RMS-Wandler (RMSC) mit dem Vergleicher verbunden ist.
  3. Erfassungseinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der RMS-Wandler über ein Bandpaßfilter (B) mit der Induktivität verbunden ist.
  4. Erfassungseinrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß ein Pulsgenerator (SW) vorgesehen ist, um die intermittierende Verbindung der Reihenschaltung der Wechselstromquelle und des durch den Kondensator und die Induktivität gebildeten Resonanzschaltkreises mit den Schienen zu steuern, und daß der Ausgang des Vergleichers mit einem Pulsdecoder (PD) verbunden ist.
EP96937115A 1995-06-30 1996-06-28 Detektiergerät für eine kurzschlussverbindung für einen gleisabschnitt Expired - Lifetime EP0835202B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1000713 1995-06-30
NL1000713A NL1000713C2 (nl) 1995-06-30 1995-06-30 Zelfdetecterende kortsluitbrug voor een beveiligde spoorbaansectie.
PCT/NL1996/000268 WO1997002169A1 (en) 1995-06-30 1996-06-28 Self-signaling short circuit link for a protected railway section

Publications (2)

Publication Number Publication Date
EP0835202A1 EP0835202A1 (de) 1998-04-15
EP0835202B1 true EP0835202B1 (de) 2000-01-19

Family

ID=19761263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96937115A Expired - Lifetime EP0835202B1 (de) 1995-06-30 1996-06-28 Detektiergerät für eine kurzschlussverbindung für einen gleisabschnitt

Country Status (10)

Country Link
EP (1) EP0835202B1 (de)
AT (1) ATE188929T1 (de)
DE (1) DE69606297T2 (de)
DK (1) DK0835202T3 (de)
HU (1) HUP9900325A3 (de)
NL (1) NL1000713C2 (de)
NO (1) NO976089L (de)
PL (1) PL324261A1 (de)
TR (1) TR199701747T1 (de)
WO (1) WO1997002169A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2431034A (en) * 2005-10-06 2007-04-11 Multiclip Co Ltd Track circuit apparatus for taking possession of a section of track by altering the circuit as an indication of an intention to take possession
NL1033077C2 (nl) * 2006-12-18 2008-06-19 Dual Inventive V O F Detectie-inrichting van een kortsluitingsbrug.
EP1935747B1 (de) 2006-12-18 2014-11-12 Dual Inventive Holding B.V. Detektionsvorrichtung einer Kurzschlussbrücke
NL2002277C2 (nl) 2007-12-04 2014-03-27 Volkerrail Nederland B V Kortsluitinrichting.
NL1036399C2 (nl) * 2009-01-09 2010-07-13 Dual Inventive B V Detectie-inrichting van een kortsluitingsbrug.
CN105676080B (zh) * 2015-12-30 2019-07-23 中国神华能源股份有限公司 铁路轨道绝缘性能测试方法和测试装置
CN114966216B (zh) * 2022-08-01 2022-11-29 中铁电气化勘测设计研究院有限公司 一种钢轨纵向电阻和过渡电阻测量系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299424A (en) * 1965-05-07 1967-01-17 Jorgen P Vinding Interrogator-responder identification system
FR1574037A (de) * 1968-04-05 1969-07-11
JPH078648B2 (ja) * 1990-03-23 1995-02-01 大同信号株式会社 軌道回路装置用レール短絡判定装置
JPH06239236A (ja) * 1993-02-19 1994-08-30 Sankooshiya:Kk 軌道短絡装置

Also Published As

Publication number Publication date
PL324261A1 (en) 1998-05-11
WO1997002169A1 (en) 1997-01-23
NO976089L (no) 1998-02-18
HUP9900325A2 (hu) 1999-05-28
DE69606297D1 (de) 2000-02-24
ATE188929T1 (de) 2000-02-15
TR199701747T1 (xx) 1998-04-21
EP0835202A1 (de) 1998-04-15
NL1000713C2 (nl) 1996-12-31
HUP9900325A3 (en) 1999-11-29
DE69606297T2 (de) 2000-09-14
DK0835202T3 (da) 2000-05-08
NO976089D0 (no) 1997-12-29

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