DE581669C - Display device for track occupation - Google Patents
Display device for track occupationInfo
- Publication number
- DE581669C DE581669C DEO19860D DEO0019860D DE581669C DE 581669 C DE581669 C DE 581669C DE O19860 D DEO19860 D DE O19860D DE O0019860 D DEO0019860 D DE O0019860D DE 581669 C DE581669 C DE 581669C
- Authority
- DE
- Germany
- Prior art keywords
- transformer
- track
- voltage
- primary
- resistance
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L13/00—Operation of signals from the vehicle or by the passage of the vehicle
- B61L13/04—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors
- B61L13/047—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors controlling inductively or magnetically
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Description
In Eisenbahnsicherungsanlagen wird häufig von sogenannten Gleisbesetzungsanzeigevorrichtungen Gebrauch gemacht. Diese haben den Zweck, durch irgendwelche Meldevorrichtungen dem Stellwerkswärter die Besetzung eines oder mehrerer Bahnhofsgleise durch einen oder mehrere Züge zuverlässig anzuzeigen. Darüber hinaus sind diese Einrichtungen in die bereits vorhandenen anderen Abhängigkeiten eingeschaltet. Die Stellung des Einfahrtsignals wird dann so lange unmöglich gemacht, als das zugehörige Gleis durch einen Zug im Bahnhof besetzt ist.In railway safety systems, so-called track occupancy display devices are often used Made use of. The purpose of these is to inform the signalman by means of any reporting devices reliably display one or more station tracks by one or more trains. In addition, these facilities are included in the other existing dependencies. The position the entry signal is then made impossible as long as the associated track is occupied by a train in the station.
Meistens werden für derartige Gleisbe- 1S Setzungsanzeigevorrichtungen isolierte Schienen verwendet. Ein an einem Ende des zu überwachenden Gleisabschnitts angeordneter Transformator speist die isolierten Schienen mit Strom niederer Spannung. Sind die 2(> Gleise unbesetzt, also von Fahrzeugachsen nicht kurzgeschlossen, so wird dabei ein am anderen Ende angeschlossenes Relais zum Anziehen gebracht und dadurch die Gleisfreimeldung herbeigeführt.Mostly 1 S reduction display devices insulated bars are used for such track occupancy. A transformer arranged at one end of the track section to be monitored supplies the insulated rails with low-voltage electricity. If the 2 ( > tracks are unoccupied, i.e. not short-circuited by the vehicle axles, a relay connected to the other end is activated and the track vacancy signal is triggered.
Mitunter werden auch Einrichtungen angewandt, um durch Zählen der einzelnen Achsen der Fahrzeuge bzw. eines Zuges das Besetzt- bzw. Freisein eines Gleisabschnittes zu überprüfen. Hierbei wird in einem Elektromagneten durch Vorbeifahren von Zugachsen eine damit verbundene Leitwertänderung zur Signalgebung ausgenutzt. Diese Einrichtungen haben aber den Nachteil, daß nur kurzzeitige Impulse auftreten, und zwar nur dann, wenn die Achsen ihren Standort 3^ gegenüber dem Impulsmagneten ändern. Bei Stillstand oder langsamer Fahrt eines Fahrzeuges tritt dann keine weitere Anzeige ein. Häufig stehen aber isolierte Gleise nicht zur Verfügung. Der Ausbau der vorhandenen eisernen Schwellen und Einbau von Holzschwellen wird in den meisten Fällen wegen der hohen Kosten nicht möglich sein. Man hat nun versucht, durch Anordnung sogenannter Achszähler bei nichtisolierten Gleisen *5 eine Gleisüberprüfung bzw. Freimeldung zu erreichen. Derartige Einrichtungen haben sich aber bis heute nicht als genügend betriebsicher erwiesen. Außerdem sind die Anschaffungs- und Unterhaltungskosten recht erheblich.Sometimes devices are also used to check whether a track section is occupied or vacant by counting the individual axles of the vehicles or a train. In this case, an associated change in the conductance value is used for signaling in an electromagnet when pull axles pass by. However, these devices have the disadvantage that only brief pulses occur, and only when the axes change their position 3 ^ with respect to the pulse magnet. When the vehicle is stationary or driving slowly, no further display appears. However, isolated tracks are often not available. The expansion of the existing iron sleepers and the installation of wooden sleepers will in most cases not be possible because of the high costs. An attempt has now been made to obtain a track check or clearance report by arranging so-called axle counters on non-insulated tracks * 5. Such facilities have not yet proven to be sufficiently operationally reliable. In addition, the acquisition and maintenance costs are quite substantial.
Bei der Gleisüberprüfung mit isolierten Fahrschienen werden diese durch die Zugachsen elektrisch kurzgeschlossen, wobei durch die einzelnen Achsen der Kurzschlußstrom fließt. Erfindungsgemäß .werden die mit ihren eisernen Schwellen einen Teil eines magnetischen Wegs bildenden Fahrschieneri durch die Zugachsen magnetisch verbunden, so daß ein magnetischer Kurzschluß entsteht. Zu diesem Zweck umschlingt eine aus einer oder mehreren Windungen bestehende Schleife j einen der Länge des zu überprüfenden Gleisstücks entsprechenden Teil der Schwellen-α (Abb. i). Durch den Transformator T wird die Schleife s mit Wechsel-When checking tracks with insulated rails, these are electrically short-circuited by the pull axles, with the short-circuit current flowing through the individual axles. According to the invention, the rails forming part of a magnetic path with their iron sleepers are magnetically connected by the tension axles, so that a magnetic short circuit occurs. For this purpose, a loop j consisting of one or more turns wraps around a part of the sleeper α corresponding to the length of the track section to be checked (Fig. I). The transformer T causes the loop s with alternating
Claims (3)
Legt man parallel zum Transformator T einen Kondensator C, dessen kapazitiver Widerstand dem induktiven des Transformators bei Gleisbesetzung angepaßt ist, so wird die oben geschilderte Wirkung nicht unwesentlich verstärkt.current of the appropriate frequency and voltage. If the track is free of tension axles, most of the magnetic lines of force from one rail to the other are closed by air. Because of the relatively low conductance, the total reactance of loop j and thus the primary impedance of transformer T is very low. If this is primarily via a constant resistance W on the network N of constant voltage, the voltage across the resistance W is relatively high when the track is free due to the high primary current, and the primary voltage of the transformer T is consequently correspondingly small. This increases sharply at the moment as soon as the rails are magnetically bridged by the tension axles d and wheels c (Fig. 2). The higher magnetic conductance ao of the loop s causes an increase in the self-induction and thus an increase in the primary impedance of the transformer T. At the same time, its primary current and thus the voltage consumption at the resistor W are reduced. If there is a relay M parallel to the resistor, its armature drops out and shows that the track is occupied. When the track becomes free, the reverse process occurs.
If a capacitor C is placed parallel to the transformer T , the capacitive resistance of which is matched to the inductive resistance of the transformer when the track is occupied, the effect described above is not insignificantly increased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEO19860D DE581669C (en) | 1932-05-15 | 1932-05-15 | Display device for track occupation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEO19860D DE581669C (en) | 1932-05-15 | 1932-05-15 | Display device for track occupation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE581669C true DE581669C (en) | 1933-08-01 |
Family
ID=7355088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEO19860D Expired DE581669C (en) | 1932-05-15 | 1932-05-15 | Display device for track occupation |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE581669C (en) |
-
1932
- 1932-05-15 DE DEO19860D patent/DE581669C/en not_active Expired
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