EP0686109B1 - Circuit for checking the operation of free track signalling relays - Google Patents
Circuit for checking the operation of free track signalling relays Download PDFInfo
- Publication number
- EP0686109B1 EP0686109B1 EP94906865A EP94906865A EP0686109B1 EP 0686109 B1 EP0686109 B1 EP 0686109B1 EP 94906865 A EP94906865 A EP 94906865A EP 94906865 A EP94906865 A EP 94906865A EP 0686109 B1 EP0686109 B1 EP 0686109B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- relays
- track
- test
- relay
- track occupancy
- 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
Links
- 230000011664 signaling Effects 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims description 35
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 5
- 238000011990 functional testing Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 3
- 101100390989 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FMS1 gene Proteins 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- 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
- B61L1/18—Railway track circuits
- B61L1/181—Details
-
- 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
- B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
Definitions
- the invention relates to a circuit according to the preamble of claim 1.
- a circuit has become known from DE 35 22 418 C2 in connection with a device for reporting the occupancy status of track sections in the area of an interlocking.
- a track vacancy detection device in which the track vacancy reports of up to eight track circuit arrangements are processed by a two-computer system, which forwards corresponding vacancy and occupancy reports to a remote signal box.
- Track circuits are provided there as free reporting devices for the individual track sections.
- the associated track sections are usually only occupied for a short time during a train journey, but mostly released; Especially on routes with little traffic, it may happen that there is no train journey over these routes for hours or days. While the switching status of the track vacancy detection equipment used changes more frequently on frequently traveled routes, and thus any incorrect reactions of the vacancy detection equipment can be recognized by known signal processing methods which are safe in terms of signal technology, this is not readily the case with the vacancy detection devices on routes with little traffic.
- the aforementioned DE-PS provides for the track circuit transmitters of the individual track circuits when the associated ones are registered Switch off track sections temporarily or connect a defined resistor to the input of the track circuit receiver. The computer system checks whether the associated track circuit receivers issue a busy message during this switch-off phase.
- This test method can be used to determine whether the track circuit receivers of the track circuits involved in the test process can be dropped;
- the output of busy messages, which result from the throwing of the track circuit receivers during the test operation, to the associated signal box must be prevented in a suitable manner so that occupancy messages that do not correspond to the actual occupancy of the track sections do not come into effect.
- the object of the invention is to provide a circuit according to the preamble of claim 1, which allows the free signal relays of free signaling devices to be subjected to a waste test with as little effort and in a signal-technically safe manner, without the signal box thereby being subjected to this functional test and thus from being thrown off the free signal relay gets knowledge as long as this waste test leads to a positive result.
- the invention solves this problem by applying the characterizing features of claim 1.
- Malfunctions of the free signal relays involved in the test operation are detected by monitoring the operating state of the free signal relays during the test operation; for the signal box, the operating status messages of the free signal relays involved in the test operation are rendered ineffective by contacts of test relays; the functional behavior of the test and free signal relays is monitored via two channels.
- the drawing shows a partial representation of the two free signaling circuit parts FMS1 and FMS2 of a two-channel track vacancy detection device which can be monitored by a secure computer system.
- the track section not shown, can be monitored in any manner, preferably by axle counters or by a track circuit, for its occupancy status.
- Free signal relays FM1 and FM2 are controlled by the axle counters or the track circuit, via whose series-connected contacts FM1 / 1 and FM2 / 1 any free signaling of the associated track section is reported to a signal box (not shown).
- the two free signal relays are designed as signal relays; their contacts are forced.
- the respective operating status of the two free signal relays is read into the two computer channels via contacts FM1 / 2 or FM2 / 2 and checked for agreement there.
- any faulty reactions of one of the two free signal relays can be signaled in this way Detect safely, as long as it can be assumed that the free relay does not react in the same way in the other free channel in the same way.
- the two free signaling relays must be subjected to a functional test (waste test) at predetermined maximum intervals.
- the maximum permissible period of time between such functional tests corresponds to the failure failure disclosure time (MTBF) of the switching means for track monitoring of the switching means provided for their functional test and can be determined by calculation.
- MTBF failure failure disclosure time
- the two computer channels trigger time-shifted and alternately assigned test relays P1 and P2.
- test relays are also designed as signal relays; their respective switching status is also read back via contacts P1 / 2 and P2 / 2 for monitoring purposes. After the test relay has been switched on, the associated free signal relays are temporarily dropped. The switching times of the test relays are dimensioned so that they clearly cover the switch-off times of the associated free signal relays on both sides. The switching of the test relays and the free signal relays is computer controlled. When the test relays are switched on, their series-connected contacts P1 / 1 and P2 / 1 in the signaling circuit to the signal box prevent the contacts FM1 / 1 or FM2 / 1 that open when the function of the signaling relay functions correctly .
- the contacts P1 / 1 and P2 / 1 of the two test relays are to be designed as make contacts if the test relays are only switched on during test operation; If the test relays are constantly switched on outside the test mode, the two contacts must be designed as normally closed contacts.
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Emergency Protection Circuit Devices (AREA)
- Relay Circuits (AREA)
- Cookers (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Schaltung nach dem Oberbegriff des Anspruches 1. Eine solche Schaltung ist im Zusammenhang mit einer Einrichtung zur Meldung des Belegungszustandes von Gleisabschnitten im Bereich eines Stellwerkes aus der DE 35 22 418 C2 bekannt worden.The invention relates to a circuit according to the preamble of
In dieser DE-PS wird eine Gleisfreimeldeeinrichtung beschrieben, bei der die Gleisfreimeldungen von bis zu acht Gleisstromkreisanordnungen von einem Zwei-Rechnersystem verarbeitet werden, das entsprechende Frei- und Besetztmeldungen an ein entferntes Stellwerk weitergibt. Als Freimeldeeinrichtungen für die einzelnen Gleisabschnitte sind dort Gleisstromkreise vorgesehen. Die zugehörigen Gleisabschnitte sind meist nur kurzzeitig während einer Zugfahrt belegt, überwiegend jedoch freigemeldet; insbesondere bei schwach befahrenen Strecken kann es vorkommen, daß über Stunden oder Tage hinaus keine Zugfahrt über diese Strecken stattfindet. Während bei häufiger befahrenen Strecken der Schaltzustand der verwendeten Gleisfreimeldeeinrichtungen häufiger wechselt und damit etwaige Fehlreaktionen der Freimeldeeinrichtungen durch bekannte signaltechnisch sichere Verarbeitungsmethoden erkannt werden können, ist dies bei den Freimeldeeinrichtungen an schwach befahrenen Strecken nicht ohne weiteres gegeben. Dennoch muß aber auch dort sichergestellt sein, daß ein Freimelderelais beim Besetzen eines zugehörigen Gleisabschnittes auch tatsächlich abgeworfen werden kann und nicht etwa durch irgendwelche Störpegel in der Wirkstellung gehalten wird. Um nun die Funktionsfähigkeit solcher Gleisstromkreise insgesamt zu überwachen, sieht die vorgenannte DE-PS vor, die Gleisstromkreissender der einzelnen Gleisstromkreise bei freigemeldeten zugehörigen Gleisabschnitten vorübergehend abzuschalten oder aber einen definierten Widerstand an den Eingang der Gleisstromkreisempfänger anzuschalten. Das Rechnersystem prüft dabei, ob während dieser Abschaltphase die zugehörigen Gleisstromkreisempfänger eine Besetztmeldung abgeben.In this DE-PS a track vacancy detection device is described, in which the track vacancy reports of up to eight track circuit arrangements are processed by a two-computer system, which forwards corresponding vacancy and occupancy reports to a remote signal box. Track circuits are provided there as free reporting devices for the individual track sections. The associated track sections are usually only occupied for a short time during a train journey, but mostly released; Especially on routes with little traffic, it may happen that there is no train journey over these routes for hours or days. While the switching status of the track vacancy detection equipment used changes more frequently on frequently traveled routes, and thus any incorrect reactions of the vacancy detection equipment can be recognized by known signal processing methods which are safe in terms of signal technology, this is not readily the case with the vacancy detection devices on routes with little traffic. Nevertheless, it must also be ensured there that a free signaling relay can actually be shed when occupying an associated track section and is not held in the active position by any interference levels. In order to monitor the overall functionality of such track circuits, the aforementioned DE-PS provides for the track circuit transmitters of the individual track circuits when the associated ones are registered Switch off track sections temporarily or connect a defined resistor to the input of the track circuit receiver. The computer system checks whether the associated track circuit receivers issue a busy message during this switch-off phase.
Durch dieses Prüfverfahren läßt sich erkennen, ob die Gleisstromkreisempfänger der in den Prüfvorgang jeweils einbezogenen Gleisstromkreise abgeworfen werden können; die Ausgabe von Besetztmeldungen, die durch das Abwerfen der Gleisstromkreisempfänger während des Prüfbetriebes entstehen, an das zugehörige Stellwerk muß dabei in geeigneter Weise unterbunden werden, damit dort nicht Belegungsmeldungen zur Auswirkung kommen, die den tatsächlichen Belegungszuständen der Gleisabschnitte nicht entsprechen. Hierzu ist es nicht nur erforderlich, die während des Prüfbetriebes entstehenden Besetztmeldungen dem Stellwerk vorzuenthalten, sondern gleichzeitig müssen die entsprechenden Freimeldesignale generiert und an das Stellwerk übermittelt werden, damit das Stellwerk die betroffenen Gleisabschnitte nach wie vor als freigemeldet ansieht. Wie dies bei der bekannten Einrichtung im einzelnen geschieht, ist in der DE-PS nicht offenbart.This test method can be used to determine whether the track circuit receivers of the track circuits involved in the test process can be dropped; The output of busy messages, which result from the throwing of the track circuit receivers during the test operation, to the associated signal box must be prevented in a suitable manner so that occupancy messages that do not correspond to the actual occupancy of the track sections do not come into effect. For this, it is not only necessary to withhold the occupancy messages that arise during the test operation from the signal box, but at the same time the corresponding vacant signals must be generated and transmitted to the signal box so that the signal box continues to view the affected track sections as released. How this happens in detail in the known device is not disclosed in DE-PS.
Aufgabe der Erfindung ist es, eine Schaltung nach dem Oberbegriff des Anspruches 1 anzugeben, die es gestattet, mit möglich wenig Aufwand und in signaltechnisch sicherer Weise die Freimelderelais von Freimeldeeinrichtungen einer Abfallprüfung zu unterziehen, ohne daß das Stellwerk dabei von dieser Funktionsprüfung und damit vom Abwerfen der Freimelderelais Kenntnis erhält, solange diese Abfallprüfung zu einem positiven Ergebnis führt.The object of the invention is to provide a circuit according to the preamble of
Die Erfindung löst diese Aufgabe durch die Anwendung der kennzeichnenden Merkmale des Anspruches 1. Fehlfunktionen der in den Prüfbetrieb einbezogenen Freimelderelais werden durch die Überwachung des Betriebszustandes der Freimelderelais während des Prüfbetriebes detektiert; für das Stellwerk werden die Betriebszustandsmeldungen der in den Prüfbetrieb einbezogenen Freimelderelais durch Kontakte von Prüfrelais unwirksam gemacht; das Funktionsverhalten der Prüf- und Freimelderelais wird zweikanalig überwacht.The invention solves this problem by applying the characterizing features of
Vorteilhafte Ausbildungen der erfindungsgemäßen Schaltung sind in den Unteransprüchen angegeben.Advantageous embodiments of the circuit according to the invention are specified in the subclaims.
Die Erfindung ist nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to an embodiment shown in the drawing.
Die Zeichnung zeigt in ausschnittsweiser Darstellung die beiden Freimeldeschaltungsteile FMS1 und FMS2 einer zweikanaligen Gleisfreimeldeeinrichtung, die durch ein sicheres Rechnersystem überwachbar ist. Der nicht weiter dargestellte Gleisabschnitt ist auf beliebige Art und Weise, vorzugsweise durch Achszähler oder durch einen Gleisstromkreis, auf seinen Belegungszustand überwachbar. Von den Achszählern oder dem Gleisstromkreis werden Freimelderelais FM1 und FM2 gesteuert, über deren in Reihe geschaltete Kontakte FM1/1 und FM2/1 eine etwaige Freimeldung des zugehörigen Gleisabschnittes an ein nicht dargestelltes Stellwerk weitergemeldet wird. Die beiden Freimelderelais sind als Signalrelais ausgeführt; ihre Kontakte sind zwangsgeführt. Der jeweilige Betriebszustand der beiden Freimelderelais wird über Kontakte FM1/2 bzw. FM2/2 in die beiden Rechnerkanäle eingelesen und dort auf Übereinstimmung geprüft. Etwaige Fehlreaktionen eines der beiden Freimelderelais lassen sich so signaltechnisch sicher erfassen, solange davon ausgegangen werden kann, daß nicht das Freimelderelais im jeweils anderen Freimeldekanal in gleicher Weise fehlerhaft reagiert. Um dies ausschließen zu können, sind die beiden Freimelderelais in vorgegebenen maximalen Zeitabständen einer Funktionsprüfung (Abfallprüfung) zu unterziehen. Die maximal zulässige Zeitspanne zwischen solchen Funktionsprüfungen entspricht der Fehlerausfalloffenbarungszeit (MTBF) der Schaltmittel zur Gleisüberwachung der für ihre Funktionsprüfung vorgesehenen Schaltmittel und läßt sich rechnerisch bestimmen. Für die Funktionsprüfung steuern die beiden Rechnerkanäle zeitlich versetzt und im Wechsel zugeordnete Prüfrelais P1 und P2 an. Diese Prüfrelais sind ebenfalls als Signalrelais ausgeführt; auch ihr jeweiliger Schaltzustand wird über Kontakte P1/2 und P2/2 zu Uberwachungszwecken zurückgelesen. Nach dem Anschalten der Prüfrelais werden die zugehörigen Freimelderelais vorübergehend abgeworfen. Die Schaltzeiten der Prüfrelais sind so bemessen, daß sie die Abschaltzeiten der zugehörigen Freimelderelais nach beiden Seiten hin deutlich überdecken. Das Schalten der Prüfrelais und der Freimelderelais geschieht rechnergesteuert. Während der Anschaltung der Prüfrelais verhindern deren in Reihe geschalteten Kontakte P1/1 und P2/1 im Meldekreis an das Stellwerk, daß die sich bei ordnungsgerechtem Funktionsverhalten der Freimelderelais öffnenden Kontakte FM1/1 oder FM2/1 das Abfallen der Freimelderelais an das Stellwerk weitermelden können. Die Kontakte P1/1 und P2/1 der beiden Prüfrelais sind als Arbeitskontakte auszubilden, wenn die Prüfrelais nur während des Prüfbetriebes angeschaltet werden; sind die Prüfrelais außerhalb des Prüfbetriebes ständig angeschaltet, so sind die beiden Kontakte als Ruhekontakte auszuführen.The drawing shows a partial representation of the two free signaling circuit parts FMS1 and FMS2 of a two-channel track vacancy detection device which can be monitored by a secure computer system. The track section, not shown, can be monitored in any manner, preferably by axle counters or by a track circuit, for its occupancy status. Free signal relays FM1 and FM2 are controlled by the axle counters or the track circuit, via whose series-connected contacts FM1 / 1 and FM2 / 1 any free signaling of the associated track section is reported to a signal box (not shown). The two free signal relays are designed as signal relays; their contacts are forced. The respective operating status of the two free signal relays is read into the two computer channels via contacts FM1 / 2 or FM2 / 2 and checked for agreement there. Any faulty reactions of one of the two free signal relays can be signaled in this way Detect safely, as long as it can be assumed that the free relay does not react in the same way in the other free channel in the same way. In order to be able to rule this out, the two free signaling relays must be subjected to a functional test (waste test) at predetermined maximum intervals. The maximum permissible period of time between such functional tests corresponds to the failure failure disclosure time (MTBF) of the switching means for track monitoring of the switching means provided for their functional test and can be determined by calculation. For the functional test, the two computer channels trigger time-shifted and alternately assigned test relays P1 and P2. These test relays are also designed as signal relays; their respective switching status is also read back via contacts P1 / 2 and P2 / 2 for monitoring purposes. After the test relay has been switched on, the associated free signal relays are temporarily dropped. The switching times of the test relays are dimensioned so that they clearly cover the switch-off times of the associated free signal relays on both sides. The switching of the test relays and the free signal relays is computer controlled. When the test relays are switched on, their series-connected contacts P1 / 1 and P2 / 1 in the signaling circuit to the signal box prevent the contacts FM1 / 1 or FM2 / 1 that open when the function of the signaling relay functions correctly . The contacts P1 / 1 and P2 / 1 of the two test relays are to be designed as make contacts if the test relays are only switched on during test operation; If the test relays are constantly switched on outside the test mode, the two contacts must be designed as normally closed contacts.
In einem zweiten Meldekreis mit den Kontakten FM1/3 und FM2/3 wird eine antivalente Freimeldeaussage für den überwachten Gleisabschnitt zur Verfügung gestellt. Durch das zeitlich versetzte Abschalten der beiden Freimelderelais während des Prüfbetriebes bleibt dieser Meldekreis im Prüfbetrieb auch beim Abfallen der Freimelderelais unterbrochen.In a second reporting circuit with the contacts FM1 / 3 and FM2 / 3, an antivalent vacant message is made available for the monitored track section. Because the two free signaling relays are switched off at different times during test operation, this signaling circuit remains interrupted in test mode even when the free signaling relay drops out.
Claims (4)
- Circuit for testing the functioning of track occupancy relays, existing in pairs, of track occupancy indicators in railways by temporary disconnection, when the associated track section has been signalled to be clear, during a test mode and monitoring the switching responses of the individual track occupancy relays, characterized in that each track occupancy relay (FM1, FM2) is associated with a test relay (P1, P2) and in that the test relays can be activated offset in time and alternatingly during the test mode, in that, for signalling that a track section is clear, two separate signalling loops are provided, one of which must be closed for signalling that the section is clear and contains series-connected normally-open contacts (FM1/1, FM2/1) of the track occupancy relays and, connected in parallel with these, contacts (P1/1, P2/1) of the associated test relays, which contacts temporarily close during the test mode, whilst the other one must be interrupted for signalling that the section is clear and contains series-connected normally-closed contacts (FM1/3, FM2/3) of the track occupancy relays, and in that the track occupancy relays are constructed as signal relays, the respective operating conditions of which can be detected via check-back contacts (FM1/2, FM2/2) of the signal relays for comparison with their respective nominal operating conditions and in that the track occupancy relays can be disconnected after the in each case associated test relay has been activated and can be connected again before the activation phase has ended.
- Circuit according to Claim 1, characterized in that the test relay is also constructed as signal relay with check-back contacts (P1/2, P2/2) for monitoring its operating state.
- Circuit according to Claim 1 or 2, characterized in that the test mode can only be carried out cyclically or spontaneously when the track occupancy relays have operationally picked up.
- Circuit according to Claim 1, 2 or 3, characterized in that the time interval between the tests of the functioning of the track occupancy relays is determined by the permissible mean time between individual failures in the circuit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9302965U | 1993-02-23 | ||
| DE9302965U DE9302965U1 (en) | 1993-02-23 | 1993-02-23 | |
| PCT/DE1994/000145 WO1994019223A1 (en) | 1993-02-23 | 1994-02-14 | Circuit for checking the operation of free track signalling relays |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0686109A1 EP0686109A1 (en) | 1995-12-13 |
| EP0686109B1 true EP0686109B1 (en) | 1997-01-15 |
Family
ID=6890029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94906865A Expired - Lifetime EP0686109B1 (en) | 1993-02-23 | 1994-02-14 | Circuit for checking the operation of free track signalling relays |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0686109B1 (en) |
| AT (1) | ATE147689T1 (en) |
| DE (2) | DE9302965U1 (en) |
| DK (1) | DK0686109T3 (en) |
| WO (1) | WO1994019223A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1198407B (en) * | 1962-02-15 | 1965-08-12 | Standard Elektrik Lorenz Ag | Circuit for functional testing of track vacancy relay |
| DE3522418A1 (en) * | 1985-06-22 | 1987-01-02 | Standard Elektrik Lorenz Ag | DEVICE FOR REPORTING THE OCCUPANCY CONDITION OF TRACK SECTIONS IN THE AREA OF AN ACTUATOR |
-
1993
- 1993-02-23 DE DE9302965U patent/DE9302965U1/de not_active Expired - Lifetime
-
1994
- 1994-02-14 DK DK94906865.4T patent/DK0686109T3/en active
- 1994-02-14 EP EP94906865A patent/EP0686109B1/en not_active Expired - Lifetime
- 1994-02-14 DE DE59401606T patent/DE59401606D1/en not_active Expired - Fee Related
- 1994-02-14 WO PCT/DE1994/000145 patent/WO1994019223A1/en active IP Right Grant
- 1994-02-14 AT AT94906865T patent/ATE147689T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DK0686109T3 (en) | 1997-07-21 |
| EP0686109A1 (en) | 1995-12-13 |
| WO1994019223A1 (en) | 1994-09-01 |
| DE9302965U1 (en) | 1993-04-29 |
| DE59401606D1 (en) | 1997-02-27 |
| ATE147689T1 (en) | 1997-02-15 |
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