EP1854697A1 - Elektrische Schaltung zum Überwachen der Schnittstelle zwischen einem elektronischem Stellwerk und einem Relaisstellwerk - Google Patents

Elektrische Schaltung zum Überwachen der Schnittstelle zwischen einem elektronischem Stellwerk und einem Relaisstellwerk Download PDF

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Publication number
EP1854697A1
EP1854697A1 EP06290777A EP06290777A EP1854697A1 EP 1854697 A1 EP1854697 A1 EP 1854697A1 EP 06290777 A EP06290777 A EP 06290777A EP 06290777 A EP06290777 A EP 06290777A EP 1854697 A1 EP1854697 A1 EP 1854697A1
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EP
European Patent Office
Prior art keywords
output
input
contact
voltage
working
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
EP06290777A
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English (en)
French (fr)
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EP1854697B1 (de
Inventor
Bernd Klose
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.)
Alcatel Lucent SAS
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Alcatel Lucent SAS
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Priority to DE602006002370T priority Critical patent/DE602006002370D1/de
Priority to AT06290777T priority patent/ATE405470T1/de
Priority to EP06290777A priority patent/EP1854697B1/de
Publication of EP1854697A1 publication Critical patent/EP1854697A1/de
Application granted granted Critical
Publication of EP1854697B1 publication Critical patent/EP1854697B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L21/00—Station blocking between signal boxes in one yard
    • B61L21/04—Electrical locking and release of the route; Electrical repeat locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • B61L27/20—Trackside control of safe travel of vehicle or train, e.g. braking curve calculation

Definitions

  • the invention relates to an electrical assembly, in particular for an interface between an electronic interlocking system and an relay interlocking system, wherein, in a first operating condition, the electrical assembly switches an input voltage at a working input onto a working output if an alternating voltage is applied at a monitoring input, and wherein, in a second operating condition, the electrical assembly switches off the working output if no voltage or a direct voltage is applied to the monitoring input.
  • railway control centers i.e, interlocking systems in the railway technology, are used to control railway field devices, in particular railway signals and railway switches of railway tracks and railway stations. Since most of the controlled field devices are of safety relevance, the components of a railway control center must be verified regularly.
  • the checking frequency may be chosen freely, typically taking into account the technology of the components.
  • the checking frequency is independent of the frequency of regular use of the components.
  • a relay railway control center its relays are only checked during regular use upon engergizing and de-energizing, i.e. the checking frequency depends on the data flow.
  • the control computer (belonging to the electronic interlocking system) provides electronic pulses periodically (a so called dynamic signal) when the control computer is executing its programming regularly,
  • the dynamic relays are energized by the dynamic signal, and the dynamic relays can forward a switching current to the output relays. If the programming of the control computer is not executed properly and the dynamic signal ceases, the dynamic relay is supposed to de-energize, thus ending the switching current to the output relays, and putting the field devices (such as railway signals) into a safe condition.
  • the electronic pulse analysis and the dynamic relays are checked periodically by a de-energizing test.
  • this de-energizing for testing could be interpreted as a regular operation (such as switching a signal to red despite of a free track).
  • This misinterpretation is prevented, in the state of the art, by doubling the pulse analysis circuit and the dynamic relays, and connecting the two sets in parallel. When one of the sets is tested, the other set can output the switching current.
  • Such a doubling of sets is necessary for each channel of the control computer, increasing the construction costs in particular for multichannel control computers.
  • an electrical assembly as introduced in the beginning, characterized in that the electronic assembly comprises a dynamic circuit, a measurement circuit with a readout output, and a buffer circuit, that the dynamic circuit comprises a switching capacity, which is connected to the monitoring input or an amplifier circuit of the monitoring input via a serial connection of a loading diode and a loading capacity, wherein a resistive component is connected in parallel to the switching capacity, that the dynamic circuit further comprises a switching transistor with a first contact, a second contact and a control contact, wherein the first contact is connected to the working input, and wherein the control contact is connected to the switching capacity or an amplifier circuit of the switching capacity, that the measurement circuit is connected to the second contact of the switching transistor, and that the buffer circuit comprises a separating diode and a buffer capacity, wherein the separating diode connects the second contact of the switching transistor with the working output, and wherein the buffer capacity is connected to the working output.
  • the switching capacitor (C2) collects charges upon any recharging of the loading capacitor (C1) when the dynamic signal is present.
  • the switching transistor (V7) becomes conductive, and forwards the input voltage to the working output.
  • the switching capacity is no further charged, but is discharged via the resistive components (R5, V4).
  • the switching transistor blocks.
  • the voltage at the second contact of the switching transistor measurement circuit drops, what can be read at the readout output, indicating proper de-energizing.
  • the voltage at the working output is maintained by the buffer capacity for some time, long enough to make the switching transistor conductive again (by resuming the dynamic signal) before the voltage at the working output has dropped significantly.
  • the inventive electrical assembly is a completely electronic surveillance tool for the dynamic of the control computer, in particular doing without any space-consuming relays such as dynamic relays. This minimizes the risk of mechanical malfunctions.
  • dynamic relays may have malfunctions that are difficult to detect with regular testing.
  • the switching transistor and the electronic assembly as a whole are much more reliable than a dynamic relay, and very easy to test.
  • the switching transistor is voltage controlled (and not current-controlled as a relay), and thus can be operated with less power consumption.
  • the inventive electronic assembly itself can maintain a switching current at the interface relays during testing by means of the buffer circuit. This makes the inventive electronic assembly very cost-effective and keeps its design simple and small.
  • the measurement circuit comprises a series connection of two resistors, and the readout output is attached between the two resistors.
  • the two resistors act as potential dividers, so a typical voltage at the readout output can be set. Further, via the resistors a relic voltage at the second contact of the switching transistor is quickly eliminated during testing.
  • the switching transistor is a field effect transistor, in particular a VMOS transistor, and the control contact of the switching transistor is the gate of the field effect transistor.
  • the field effect transistor is voltage controlled, and only little electric power at the control contact is sufficient for controlling the forwarding of voltage.
  • control contact of the switching transistor is connected to the working input via a resistor, or a limiting diode, or a resistor and a limiting diode connected in parallel.
  • the switching capacity is connected to the basis of a DC amplification transistor via a resistor, and the collector of the DC amplification transistor is connected to the control contact of the switching transistor via a resistor.
  • the basis of the DC amplification transistor is connected to a grounded resistor.
  • a grounded resistor With the grounded resistor, a relic voltage at the switching capacity can be eliminated more quickly. It further helps setting the amplification factor at the DC amplification transistor.
  • the electrical assembly is characterized in that the monitoring input is connected to the basis of an AC amplification transistor via a resistor, that the collector of the AC amplification transistor is connected to a supply voltage input via a resistor, and that the collector of the AC amplification transistor is connected to the loading capacitor, in particular via a resistor.
  • the signal at the monitoring input is amplified in order to allow or accelerate the loading of the switching capacity.
  • a typical voltage at the supply voltage input is 5 V DC.
  • the resistor (R3) upstream of the loading capacitor helps to avoid current peaks.
  • Another advantageous embodiment provides that a grounded discharging diode is attached between the loading diode and the loading capacity.
  • the discharging diode helps to discharge the loading capacity during testing.
  • a railway control center device comprising at least one output relay for a railway field device such as a railway signal or a track switch, and a control computer for controlling the at least one relay, wherein the control computer has a monitoring output for providing an alternating voltage signal in order to indicate its proper working condition
  • the railway control center device further comprises an inventive electric assembly (or one of its embodiments mentioned above), wherein the at least one output relay has a control input which is connected to the working output of the electric assembly, and wherein the monitoring output of the control computer is connected to the monitoring input of the electric assembly.
  • the inventive railway control center device can secure the at least one output relay, and it can be tested whenever desired, in particular periodically and independent from regular use, without interfering into the regular use when testing.
  • Fig. 1 shows a circuit diagram of an inventive electric assembly.
  • the electric assembly is connected between a control computer (which is part of an electric interlocking system) and a set of output relays Rel1, Rel2.
  • the output relays Rel1, Rel2 control railway field devices such as railway signals according to the orders of the control computer (the details of this controlling are not shown here).
  • the electric assembly is adapted to forward a constant input voltage Vin at a working input 1 to a working output 2, which is connected to the control inputs of the output relays Rel1, Rel2, as long as the control computer works properly.
  • control computer As long as the control computer works properly, it provides an AC dynamic signal (such as a sinusoidal or saw tooth voltage) to a monitoring input 3 of the electric assembly.
  • an AC dynamic signal such as a sinusoidal or saw tooth voltage
  • the electric assembly stops the forwarding of the input voltage Vin to the working output 2 by means of a dynamic circuit 4. Nonetheless, the voltage Vrel at the working output 2 stays for some time at its level by means of a buffer circuit 5.
  • the ending of the forwarding of the input voltage Vin can be noticed with the aid of a measuring circuit 6 providing a readout signal Vread to a readout output 7 before Vrel drops significantly. If the dynamic signal is reestablished quickly enough (i.e, within a "buffer time" of the buffer circuit), the input voltage Vin is forwarded again before Vrel has dropped significantly. This characteristic is used to test the electric assembly. In this case, there is no interruption of the voltage supply of the output relays Rel1, Rel2. If the dynamic signal is not reestablished quickly enough, what is in particular the case at a malfunction of the control computer, the voltage at the working output 2 finally drops. Then the output relays Rel1, Rel2 get no more (or not enough) relay voltage Vrel and switch into a safe state.
  • a dynamic signal (such as a rectangular alternating voltage of e.g. 5 volts peak to peak and 10 Hz) is present at the monitoring input 3.
  • the dynamic signal is provided via resistor R1 to the basis of the AC amplification transistor V1.
  • V1 blocks, and the loading capacitor C1 and the switching capacitor C2 are loaded by the supply voltage Vsup of supply voltage input 8 via resistors R2, R3, and loading diode V2.
  • the switching capacitor C2 provides (via resistor R4) the basis of a DC amplification transistor V4 with a voltage, so V4 becomes conductive.
  • the switching transistor V7 (here a field effect transistor) gets a voltage onto its control contact 10 (here its gate).
  • the voltage at the control contact 10 is limited by the limiting diode V6.
  • V4, R4, R6, R7 and V6 form an amplification circuit 13 of the switching capacity C2.
  • C2 is called switching capacitor.
  • the regular operation is maintained for a predefined time, such as one hour or one day, and then a test procedure is launched, independent of the use of the output relays Rel1, Rel2.
  • a constant high level signal is set instead of the dynamic signal.
  • the AC amplification transistor V1 is conductive, and loading capacitor C1 is discharged via the discharging diode V3 and resistor R3 and V1.
  • the switching capacitor C2 is not reloaded periodically any more, but discharged via the resistive components V4 and R5, and R4.
  • the DC amplification transistor V4 blocks, and the control contact 10 of switching transistor V7 looses its voltage.
  • the buffer capacity C3 provides the energy for the output relays Rel1, Rel2.
  • separating diode V8 blocks and prevents the buffer capacity C3 from discharging via the resistors R8, R9.
  • the testing can also be done with a constant low level signal at the monitoring input 3.
  • C1 there is a constant voltage. Since C2 requires changing charges at C1 for further loading, C2 is discharges via R4, R5, V4 again, with the further function of the electric assembly as described above.
  • Figure 2 describes an inventive method for operating a railway control center device, comprising an inventive electric assembly as described above, connected to a control computer and at least one output relay.
  • the railway control center device is, at the beginning, in regular operation 21.
  • the dynamic signal is provided to the monitoring input of the electric assembly by the monitoring output of the control computer.
  • the control computer After a time interval Tver, the control computer starts automatically a test procedure 22.
  • the signal at the monitoring input is put to a constant high level. Then it is waited for a time interval Tdis, long enough for the switching capacitor C2 to discharge, and the switching transistor V7 to block, but short enough so buffer capacity C3 is not yet discharged.
  • Tdis the time interval for the switching capacitor C2 to discharge, and the switching transistor V7 to block, but short enough so buffer capacity C3 is not yet discharged.
  • the readout signal Vout at the readout output is read out in step 23.
  • Vout is at high level, indicating that the dynamic circuit does not de-energize as required for safety reasons, an emergency shutdown 24 of the input voltage Vin is undertaken.
  • the voltage Vrel at the working output drops to zero, putting the output relays into a safe condition.
  • the defective dynamic circuit can be repaired or exchanged afterwards,
  • the invention describes a safety tool guaranteeing a turning off of a switching voltage of at least one output relay in case a control computer (or micro controller), which operates or controls the output relays, has a defect.
  • a defect is indicated by the cessation of a dynamic signal which is provided to the electronic assembly.
  • the electronic assembly can be tested for de-energizing independent of the use of the output relays by the control computer, and in particular as often as desired, without interfering into the regular operation of the output relays.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Logic Circuits (AREA)
  • Fire Alarms (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
EP06290777A 2006-05-10 2006-05-10 Elektrische Schaltung zum Überwachen der Schnittstelle zwischen einem elektronischem Stellwerk und einem Relaisstellwerk Expired - Lifetime EP1854697B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE602006002370T DE602006002370D1 (de) 2006-05-10 2006-05-10 Elektrische Schaltung zum Überwachen der Schnittstelle zwischen einem elektronischem Stellwerk und einem Relaisstellwerk
AT06290777T ATE405470T1 (de) 2006-05-10 2006-05-10 Elektrische schaltung zum überwachen der schnittstelle zwischen einem elektronischem stellwerk und einem relaisstellwerk
EP06290777A EP1854697B1 (de) 2006-05-10 2006-05-10 Elektrische Schaltung zum Überwachen der Schnittstelle zwischen einem elektronischem Stellwerk und einem Relaisstellwerk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06290777A EP1854697B1 (de) 2006-05-10 2006-05-10 Elektrische Schaltung zum Überwachen der Schnittstelle zwischen einem elektronischem Stellwerk und einem Relaisstellwerk

Publications (2)

Publication Number Publication Date
EP1854697A1 true EP1854697A1 (de) 2007-11-14
EP1854697B1 EP1854697B1 (de) 2008-08-20

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EP06290777A Expired - Lifetime EP1854697B1 (de) 2006-05-10 2006-05-10 Elektrische Schaltung zum Überwachen der Schnittstelle zwischen einem elektronischem Stellwerk und einem Relaisstellwerk

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Country Link
EP (1) EP1854697B1 (de)
AT (1) ATE405470T1 (de)
DE (1) DE602006002370D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116039710A (zh) * 2022-11-28 2023-05-02 通号城市轨道交通技术有限公司 全电子计算机联锁与继电集中联锁的接口电路及通信方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743755A1 (de) * 1987-12-23 1989-07-06 Standard Elektrik Lorenz Ag Verfahren zum uebermitteln von blockinformation zwischen spurplanstellwerken
EP0787639A1 (de) * 1996-02-02 1997-08-06 Siemens Schweiz AG Vorrichtung zur Ankopplung eines elektronischen Stellwerks an ein Relaisstellwerk

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743755A1 (de) * 1987-12-23 1989-07-06 Standard Elektrik Lorenz Ag Verfahren zum uebermitteln von blockinformation zwischen spurplanstellwerken
EP0787639A1 (de) * 1996-02-02 1997-08-06 Siemens Schweiz AG Vorrichtung zur Ankopplung eines elektronischen Stellwerks an ein Relaisstellwerk

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BLECHINGER H-J: "EB L2000 - ELEKTRONISCHE BLOCKTECHNIK FUER CIR-ELKE-STRECKEN", SIGNAL + DRAHT, TELZLAFF VERLAG GMBH. DARMSTADT, DE, vol. 87, no. 3, March 1995 (1995-03-01), pages 80 - 83, XP002016086, ISSN: 0037-4997 *
LENNARTZ K ET AL: "BEDIENUNG VON RELAISSTELLWERKEN AUS ESTW", SIGNAL + DRAHT, TELZLAFF VERLAG GMBH. DARMSTADT, DE, vol. 85, no. 4, 1 April 1993 (1993-04-01), pages 126 - 130, XP000380311, ISSN: 0037-4997 *
RAHN ET AL: "Integration von Relaisstellwerken in die Bedienoberfläche des ESTW L90", SIGNAL + DRAHT, TELZLAFF VERLAG GMBH. DARMSTADT, DE, vol. 93, no. 4, April 2001 (2001-04-01), pages 24 - 26, XP002348969, ISSN: 0037-4997 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116039710A (zh) * 2022-11-28 2023-05-02 通号城市轨道交通技术有限公司 全电子计算机联锁与继电集中联锁的接口电路及通信方法

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Publication number Publication date
DE602006002370D1 (de) 2008-10-02
ATE405470T1 (de) 2008-09-15
EP1854697B1 (de) 2008-08-20

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