EP2403745B1 - Devices for detecting the occupied state or free state of a track section and method for operating such devices - Google Patents

Devices for detecting the occupied state or free state of a track section and method for operating such devices Download PDF

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Publication number
EP2403745B1
EP2403745B1 EP10708959.1A EP10708959A EP2403745B1 EP 2403745 B1 EP2403745 B1 EP 2403745B1 EP 10708959 A EP10708959 A EP 10708959A EP 2403745 B1 EP2403745 B1 EP 2403745B1
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EP
European Patent Office
Prior art keywords
sig
track section
phase shift
signal
rails
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.)
Not-in-force
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EP10708959.1A
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German (de)
French (fr)
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EP2403745A1 (en
Inventor
Peer Bohlmann
Gerald Lude
Bernd Raschke
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Siemens AG
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Siemens AG
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Priority to PL10708959T priority Critical patent/PL2403745T3/en
Publication of EP2403745A1 publication Critical patent/EP2403745A1/en
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Publication of EP2403745B1 publication Critical patent/EP2403745B1/en
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    • 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
    • B61L1/187—Use of alternating current
    • 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
    • B61L1/188—Use of coded current

Definitions

  • the present invention relates to a device for detecting the occupancy or free state of a track section with a transmitter for feeding a transmission signal in the form of an AC voltage in the rails of the track section and at least one receiver for receiving a by a transmission of the transmission signal on the rails of the track section caused reception signal,
  • Such a device is in the form of a trained as track circuit track free reporting device, for example, from the company publication of Siemens AG "FTG S - track vacancy with the audio frequency track circuit FTG S", order no. A19100-V100-B607-V2 known.
  • a transmitter feeds an AC voltage into the rails of a track section to be monitored.
  • a receiver receives a receive signal in the form of the incoming voltage and evaluates the receive signal. Due to the fact that a rail vehicle traveling through the track section causes a short circuit between the rails of the track section through its axes, the transmission of the transmission signal to the receiver is prevented. This thus makes it possible to detect the busy condition of the track section in question.
  • the track circuit receiver has a variable band-pass filter whose center frequency of the frequency of a track circuit encoders of the track circuit is tracked exactly.
  • the output signal of the track circuit generator is fed to the track circuit receiver via a special connection.
  • German patent application DE 21 47 773 A1 describes a device for busy signaling a track section, in which an AC voltage fed in at the beginning of the track section is fed to a receiving device, where its phase is compared with the phase of a received AC voltage and a busy shift is derived from a phase shift.
  • the present invention has for its object to provide a device of the type mentioned in the error, in particular device-side cable fault, can be detected very reliable and at the same time cost.
  • a device for detecting the busy or idle state of a track section with a transmitter for feeding a transmission signal in the form of an AC voltage in the rails of the track section, a first receiver for receiving a through the transmission of the transmission signal via the rails of a first part of the track section caused the first reception signal and a second receiver to receive a second reception signal caused by the transmission of the transmission signal via the rails of a second part of the track section, the device for determining the Phase shift between the first receive signal and the second receive signal is formed.
  • the device due to the fact that the device has a transmitter as well as at least two receivers, it is possible to determine the phase shift between the first receive signal and the second receive signal. As a result, an error monitoring of the device, in particular with regard to cable faults, is made possible in a particularly efficient and simple manner.
  • the solution according to the invention is based on the idea that the determination of the phase shift between the signals used makes it possible to detect deviations or disturbances or errors, in particular with regard to the path of the signals.
  • the device according to the invention is furthermore advantageous in that the evaluation of the phase shift between the received signals can be carried out independently of the processing and evaluation of the actual message information. Therefore, it is possible in particular to distinguish between a defect, such as in the form of a cable fault, and a busy message due to an axle action. It should be noted that with the phase shift between the reception signals, a parameter for error detection is used, which does not apply in the context of the detection of the busy or free state of the track section.
  • Another advantage is the fact that, in contrast to other conceivable circuits for monitoring the cables or lines in the cable or in the cables advantageously little or no additional circuit parts are needed, so that the inventive Device is particularly cost feasible. Due to the fact that errors can be detected reliably, it is also conceivable that the requirement for a separate routing of transmitting and receiving lines, ie lines leading from the track to the transmitter or receiver, could be omitted. Such a modification made possible in principle by the device according to the invention would lead to a considerable simplification of the cabling of the railway monitoring installation in the form of the device for detecting the occupied or free state of the track section.
  • the transmitter and the at least two receivers of the device are arranged directly on the track.
  • said components and means for determining the phase shift between the respective signals i.
  • a correspondingly designed evaluation device preferably assigned to the indoor unit, i. For example, installed or housed in a signal box.
  • the device by means of the device according to the invention, a continuous determination of the phase shift between the received signals.
  • a permanent functional monitoring of the device is advantageously ensured.
  • the phase shift between the respective signals it is also possible, for example, for the phase shift between the respective signals to be determined only within the framework of the course of a functional test of the device.
  • a corresponding function test could be performed, for example, every minute, hourly or daily depending on the respective requirements.
  • the device according to the invention can be used particularly advantageously in conjunction with audio frequency track circuits, since the signal used to detect the busy or free state of the track section is already an AC signal.
  • the device according to the invention it is also possible for the device according to the invention to be used in conjunction with such track circuits which operate with a signal frequency below or above the audible tone range or else according to a direct current principle.
  • the transmission signal in the form of the alternating voltage is a signal which is superimposed on the direct current used for the detection and serves exclusively to monitor the function of the device by determining the phase shift between two reception signals.
  • a corresponding transmission signal in the form of an alternating voltage can either be permanently superimposed on the direct current or, for example, additionally fed in at predetermined time intervals merely for functional testing.
  • the inventive device for comparing the phase shift is formed with at least one reference phase shift.
  • This is advantageous because it allows a particularly simple evaluation of the phase shift.
  • a determination of the phase shift between the received signals in the functional, error-free state of the device for detecting the busy or free state of a track section can be made.
  • This phase shift can then be stored in the form of the reference phase shift, optionally taking into account tolerance values, for example in a memory device of the device.
  • tolerance values for example in a memory device of the device.
  • the affected, associated track section is preferably as a precaution immediately reported as busy in the event of an error to avoid hazards.
  • monitoring of the phase shift between the first and the second receive signal would also be possible, for example, by permanently comparing the current one Phase shift takes place with a reference phase shift in the form of the last determined value of the phase shift. This also makes it possible to detect a change in the phase shift immediately and without delay.
  • the device according to the invention can also be developed in such a way that, based on the comparison between the phase shift and the reference phase shift, they are designed to generate an error signal indicating an interference condition.
  • the error signal is thus advantageously the possibility, for example, to alert operating personnel of a signal box directly to the presence of an error.
  • An error signal indicating a fault condition generated by the apparatus based on the Comparison between the phase shift and the reference phase shift has been generated can be output in different ways. So it would be conceivable in principle that only a corresponding entry is made in a log file.
  • the respective device according to the invention for outputting the error signal is designed in the form of an optical and / or acoustic warning message.
  • the transmitter is designed to feed a modulation signal encoded transmit signal into the rails of the track section and the device for comparing the modulation of at least one of the receive signals formed with the modulation of the transmit signal.
  • a modulation signal encoded transmit signal is advantageous because it increases the insensitivity to interference.
  • the assembly is simplified, resulting in addition a time and cost savings.
  • the project planning of a railway monitoring system is simplified, as there are no assignments of codes or modulations are to be provided to devices and therefore also not to deposit corresponding maps on site plans and data sheets and are observed below.
  • any restrictions with regard to the number and type of modulation used for coding are advantageously eliminated, so that the prerequisite is created that a multiple use of the same modulations within a plant can be ruled out.
  • the device according to the invention can preferably be designed to generate a transmission signal coded by means of any modulation, in particular random-based, modulation. If, when comparing the modulation of the receive signal with the modulation of the transmit signal, a deviation of the modulations is detected, the track section assigned to the device is preferably immediately reported as busy for the purpose of avoiding danger.
  • the device according to the invention can also be developed in such a way that the respective device for transmitting data signals via the rails of the track section is formed on a railway vehicle occupying the track section.
  • the device can be used in addition to the information transmission to a rail vehicle.
  • This supports, for example, applications in the area of linear train control.
  • a correspondingly further developed device can advantageously be designed such that the transmitter and receiver are connected to the respective track-side feed points, for example in the form of so-called track terminal housing, such that either a transmit signal of a transmitter or a receive signal for either fed into the feed points a receiver can be read or received.
  • Such a known switching is advantageous because the transmission of Data signals to a rail vehicle is only possible as long as the transmitter is in the direction of travel in front of the rail vehicle. The reason for this is that otherwise by a short-circuiting of the rails through the axes of the rail vehicle and the transmission of data signals to a usually arranged in the front region of a rail vehicle receiving device is prevented.
  • the device according to the invention is also advantageous in that the determination of the phase shift between the two reception signals is possible in the same way regardless of the direction of travel and the position of the rail vehicle in the track section.
  • the present invention further relates to a method of operating a device for detecting the occupancy or free state of a track section.
  • the present invention has the object to provide a method for operating a device for detecting the busy or free state of a track section, which makes it possible to detect errors, especially device-side cable fault, particularly reliable and cost-effective.
  • This object is achieved by a method for operating a device for detecting the busy or free state of a track section, wherein a transmission signal is fed in the form of an AC voltage in the rails of the track section, a through the transmission of the transmission signal on the rails of a first Part of the track section effected received first received signal, one caused by the transmission of the transmission signal on the rails of a second part of the track section second receive signal is received and the phase shift between the first receive signal and the second receive signal is determined.
  • the inventive method is designed such that the phase shift is compared with at least one reference phase shift.
  • the method according to the invention is configured in such a way that an error signal indicating a fault condition is generated based on the comparison between the phase shift and the reference phase shift.
  • the inventive method can also run such that the error signal is output in the form of an optical and / or acoustic warning message.
  • the inventive method is configured such that a coded by a modulation transmission signal is fed into the rails of the track section and the modulation of the receive signal or the modulation of at least one of the receive signals is compared with the modulation of the transmit signal.
  • data signals are transmitted to a rail vehicle occupying the track section via the rails of the track section.
  • FIG. 1 shows a schematic sketch of an arrangement with a track section and a device with a transmitter and a receiver. Shown is a device V for detecting the busy or free state of a track section G.
  • the device V has a transmitter S for feeding a transmission signal SIG S in the form of an AC voltage in the rails F of the track section G.
  • the device V a receiver E for receiving a caused by the transmission of the transmission signal SIG S on the rails F of the track section G reception signal SIG E.
  • an AC voltage of the frequency f1 is fed into the track section G.
  • the adjacent track sections are operated with an alternating voltage of different frequency f5 or f3.
  • the arrangement shown in the figure is an audio frequency track circuit with a plurality of frequencies, in which an AC voltage in the form of a transmission signal SIG S in the audio frequency range is fed into the tracks F of the track section G.
  • the device V can be arranged for example in a signal box of a railway installation or a railway monitoring system.
  • This offers the advantage that a particularly high level of reliability is achieved, since mechanical load and climatic influences with respect to the electronic components of the device V have a lower effect than would be the case if these components were accommodated close to the track.
  • this results in further advantages in terms of availability and maintenance of the device V, ie in particular the transmitter S and the receiver E.
  • the horizontal dot-dash line is in FIG. 1 a corresponding separation between the indoor unit, which is associated with the device V, and the outdoor area, to which the track section G belongs, indicated.
  • trackside siding housing Gag1, GAG2 disposed, which serve for introducing the injected by the transmitter S respectively provided transmission signal SIG S respectively for reading out the transmit to the receiver E reception signal SIG E into or out of the rails F.
  • the track connection housing GAG1, GAG2 hereby contain no active electronic components, but essentially only a resonant circuit for frequency-selective amplification of the input or output signals of predetermined useful frequency, ie in the case of in FIG. 1 shown track section G of the frequency f1.
  • the device V further comprises an evaluation device AE, which is used to determine the phase shift between that of the Transmitter S transmitted transmit signal SIG S and received by the receiver E receive signal SIG E is used.
  • the evaluation device AE receives the transmission signal SIG S from the transmitter S and the reception signal SIG E from the receiver E and carries out a preferably signal-technically reliable determination of the phase shift between the two signals SIG S , SIG E.
  • the device V or the evaluation device AE for comparing the determined phase shift formed with at least one reference phase shift.
  • the reference phase shift is preferably the value of the phase shift between the transmit signal SIG S and the receive signal measured in the error-free state of the system.
  • Disturbances for example due to the crosstalk of the signals of adjacent track circuits, for example due to damage to an electrical line, can now advantageously be reliably detected on the basis of the comparison of the phase shift with the reference phase shift.
  • the track section G precaution as occupied and generates an error signal indicating the relevant fault condition.
  • the error signal can be output, for example, in the form of an optical and / or acoustic warning message.
  • a reliable distinction between a disturbance i. a cable error
  • a regular free-busy message allows.
  • the determination of the phase shift and the comparison with the reference phase shift can advantageously be realized in a comparatively low-cost manner, so that little or no additional circuit components are needed, which results in cost savings compared to other conceivable solutions.
  • FIG. 1 is only a schematic representation. Thus, in practice, other components may be present or required, which in FIG. 1 are not shown for reasons of clarity. So it is conceivable, for example, that the device V in addition to the transmission of data signals on the rails F of the track section G is formed on a the track section G occupying rail vehicle.
  • the transmitter S of the device V advantageously has an external drive, by means of which the data signals can be supplied to the transmitter S.
  • FIG. 2 shows a schematic diagram of an arrangement with a center-fed track section and a first embodiment of the device according to the invention with a transmitter and two receivers.
  • the receivers E1, E2 are each supplied with a receive signal SIG E or SIG E2 via the track connection housings GAG1, GAG3.
  • the first receiver E1 serves to receive the first reception signal SIG E1 caused by the transmission of the transmission signal SIG S via the travel rails F of a first part of the track section G, the first part of the track section passing through the route between the track connection housings GAG1 and GAG2 is formed.
  • the second receiver E2 serves to receive the second reception signal SIG E2 caused by the transmission of the transmission signal SIG S via the travel rails F of a second part of the track section G formed by the route between the track connection housings GAG2 and GAG3.
  • a monitoring of the functioning of the device V in the form of the track-free reporting device take place in that the phase shift between the first receive signal SIG E1 of the receiver E1 and the second receive signal SIG E2 of the second receiver E2 is determined.
  • the thus determined phase shift allows reliable detection of interference, especially in the form of cable faults.
  • This is included an arrangement with a transmitter S and a plurality of receivers E1, E2 of particular importance, since in particular in the event that the lines of multiple receivers E1, E2 are guided within a cable, interference by crosstalk or coupling a receive signal in the line of other recipient can be caused.
  • Such disturbances or errors are reliably detected by means of the evaluation device AE of the device V by comparing the phase between the received signals SIG E1 , SIG E2 , so that even in the case of lines of several receivers E1, E2, in the same cable be guided, errors or disturbances can be excluded.
  • the device has more than two, i. For example, if there were three receivers, the phase shift of a combination or several combinations of the receive signals of the receivers could be determined analogously to the procedure described above.
  • FIG. 3 shows a schematic diagram of an arrangement with a track section in the form of a switch and a second embodiment of the device according to the invention with a transmitter and two receivers. Similar to the illustration in FIG. 2 this is an arrangement with a device V with a transmitter S and two receivers E1, E2. In the case shown, this is a switch circle, which is used to completely monitor a switch W.
  • FIG. 4 shows a schematic representation to illustrate an embodiment of the method according to the invention a graph with a transmit signal and two receive signals. Shown here is the amplitude A as a function of time t for a transmit signal SIG S , a first receive signal SIG E1 and a second receive signal SIG E2 . According to the presentation of the FIG. 4 The illustrated signals SIG S , SIG E1 , SIG E2 differ not only in terms of their amplitude A, but in particular also in terms of their phase.
  • phase shift PH S, E1 between the transmit signal SIG S and the first receive signal SIG E1 , the phase shift PH S, E2 between the transmit signal SIG S and the second receive signal SIG E2 and / or the phase shift PH E1, E2 between the first receive signal SIG E1 and the second receive signal SIG E2 are determined.
  • phase shifts PH S, E1 , PH S, E2 , PH E1, E2 for example by comparison with a respective corresponding reference phase shift, allows a review of the signal path of the respective receive signals SIG E1 or SIG E2 or both receive signals SIG E1 , SIG E2 .

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zur Detektion des Belegt- oder Freizustandes eines Gleisabschnitts mit einem Sender zum Einspeisen eines Sende-Signals in Form einer Wechselspannung in die Fahrschienen des Gleisabschnitts und zumindest einem Empfänger zum Empfangen eines durch eine Übertragung des Sende-Signals über die Fahrschienen des Gleisabschnitts bewirkten Empfangs-Signals,The present invention relates to a device for detecting the occupancy or free state of a track section with a transmitter for feeding a transmission signal in the form of an AC voltage in the rails of the track section and at least one receiver for receiving a by a transmission of the transmission signal on the rails of the track section caused reception signal,

Eine solche Vorrichtung ist in Form einer als Gleisstromkreis ausgebildeten Gleisfreimeldeeinrichtung beispielsweise aus der Firmenveröffentlichung der Siemens AG "FTG S - Gleisfreimeldung mit dem Tonfrequenz-Gleisstromkreis FTG S", Bestell-Nr. A19100-V100-B607-V2 bekannt. Dabei speist ein Sender eine Wechselspannung in die Fahrschienen eines zu überwachenden Gleisabschnitts ein. Ein Empfänger empfängt ein Empfangs-Signal in Form der ankommenden Spannung und wertet das Empfangs-Signal aus. Dadurch, dass ein den Gleisabschnitt befahrendes Schienenfahrzeug durch seine Achsen einen Kurzschluss zwischen den Fahrschienen des Gleisabschnitts bewirkt, wird die Übertragung des Sende-Signals an den Empfänger verhindert. Dies ermöglicht es somit, den Belegtzustand des betreffenden Gleisabschnitts zu erkennen.Such a device is in the form of a trained as track circuit track free reporting device, for example, from the company publication of Siemens AG "FTG S - track vacancy with the audio frequency track circuit FTG S", order no. A19100-V100-B607-V2 known. In this case, a transmitter feeds an AC voltage into the rails of a track section to be monitored. A receiver receives a receive signal in the form of the incoming voltage and evaluates the receive signal. Due to the fact that a rail vehicle traveling through the track section causes a short circuit between the rails of the track section through its axes, the transmission of the transmission signal to the receiver is prevented. This thus makes it possible to detect the busy condition of the track section in question.

Generell besteht bei Vorrichtungen zur Detektion des Belegt- oder Freizustandes eines Gleisabschnitts der eingangs genannten Art aus Sicherheitsgründen die Anforderung, dass aufgrund der hiermit verbundenen Gefährdungen ein fälschliches Anzeigen eines Freizustandes unter keinen Umständen erfolgen darf.In general, in devices for detecting the occupancy or free state of a track section of the type mentioned for safety reasons, the requirement that due to the associated hazards false display of a free state under any circumstances may take place.

Daher ist es zum Vermeiden von Beeinflussungen beispielsweise üblicherweise untersagt, Sende- und Empfangsleitungen eines Gleisstromkreises innerhalb eines gemeinsamen Kabels zu führen. Dennoch sind grundsätzlich Fälle denkbar, in denen unerwünschte Beeinflussungen zwischen Sender und Empfänger beziehungsweise zwischen den jeweiligen Leitungen zu den Fahrschienen auftreten können.Therefore, to avoid interference, for example, it is usually prohibited to route transmit and receive lines of a track circuit within a common cable. Nevertheless, cases are fundamentally conceivable in which undesired influences between transmitter and receiver or between the respective lines to the rails can occur.

Dies betrifft sowohl Vorrichtungen mit einem Sender und einem Empfänger als auch insbesondere solche Vorrichtungen, die mehrere, in der Regel zwei oder drei, Empfänger aufweisen. So besteht beispielsweise im Rahmen einer Überwachung von Weichen oder Kreuzungen mittels eines einzigen Gleisstromkreises die Anforderung beziehungsweise Notwendigkeit, mehrere Empfänger zu verwenden. Gleiches gilt beispielsweise auch für den Fall, dass das Sende-Signal dem Gleisabschnitt mittels einer so genannten Mitteneinspeisung zugeführt wird, wobei an beiden Enden des Gleisabschnitts jeweils ein Empfänger vorgesehen ist. Bei solchen Vorrichtungen mit mehreren Empfängern können nun störende Beeinflussungen insbesondere auch in dem Fall auftreten, dass die elektrischen Leitungen von mehreren Empfängern innerhalb eines gemeinsamen Kabels geführt werden. In einem solchen Fall ist sicherzustellen, dass auch bei Auftreten eines Fehlers, d.h. beispielsweise bei einer einen Kurzschluss bewirkenden Beschädigung eines Kabels beziehungsweise einer der in dem Kabel geführten Leitungen, eine fälschliche Freimeldung eines Gleisabschnitts zuverlässig vermieden wird. Eine solche fälschliche Freimeldung könnte beispielsweise dadurch entstehen, dass aufgrund eines Kurzschlusses der hohe Pegel eines ersten Empfangs-Signals eines ersten Empfängers in die Leitung eines zweiten Empfängers, dessen zweites Empfangs-Signal aufgrund einer Belegung einen niedrigen Pegel aufweist, einkoppelt.This applies both to devices with a transmitter and a receiver and, in particular, to such devices which have a plurality of, as a rule two or three, receivers. For example, in the context of monitoring turnouts or crossings by means of a single track circuit, there is the requirement or necessity to use multiple receivers. The same applies, for example, for the case that the transmission signal is supplied to the track section by means of a so-called center feed, wherein at both ends of the track section in each case a receiver is provided. In such devices having a plurality of receivers, disturbing influences can now also occur, in particular in the event that the electrical lines are guided by a plurality of receivers within a common cable. In such a case, it must be ensured that even if an error occurs, ie, for example, in the case of damage to a cable causing a short circuit or one of the lines routed in the cable, a false clear signal of a track section is reliably avoided. Such an erroneous free message could, for example, arise because due to a short circuit, the high level of a first receive signal of a first receiver in the line of a second receiver whose second receive signal due to an occupancy has a low level coupled.

Aus der veröffentlichten europäischen Patentanmeldung EP 0 282 932 A2 ist ein frequenzmodulierter Gleisstromkreis bekannt, dessen Gleisstromkreisempfänger einen regelbaren Bandpassfilter aufweist, dessen Mittenfrequenz der Frequenz eines Gleisstromkreissenders des Gleisstromkreises exakt nachgeführt wird. Hierzu wird das Ausgangssignal des Gleisstromkreissenders dem Gleisstromkreisempfänger über eine besondere Verbindung zugeführt.From the published European patent application EP 0 282 932 A2 is a frequency-modulated track circuit is known, the track circuit receiver has a variable band-pass filter whose center frequency of the frequency of a track circuit encoders of the track circuit is tracked exactly. For this purpose, the output signal of the track circuit generator is fed to the track circuit receiver via a special connection.

Die deutsche Offenlegungsschrift DE 21 47 773 A1 beschreibt eine Einrichtung zur Besetztmeldung eines Gleisabschnitts, bei der eine am Anfang des Gleisabschnitts eingespeiste Wechselspannung einer Empfangseinrichtung zugeleitet wird, dort ihre Phase mit der Phase einer empfangenen Wechselspannung verglichen wird und aus einer Phasenverschiebung eine Besetztmeldung hergeleitet wird.The German patent application DE 21 47 773 A1 describes a device for busy signaling a track section, in which an AC voltage fed in at the beginning of the track section is fed to a receiving device, where its phase is compared with the phase of a received AC voltage and a busy shift is derived from a phase shift.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, bei der Fehler, insbesondere vorrichtungsseitige Kabelfehler, besonders zuverlässig und zugleich kostengünstig erkannt werden können.The present invention has for its object to provide a device of the type mentioned in the error, in particular device-side cable fault, can be detected very reliable and at the same time cost.

Diese Aufgabe wird erfindungsgemäß gelöst durch eine Vorrichtung zur Detektion des Belegt- oder Freizustandes eines Gleisabschnitts mit einem Sender zum Einspeisen eines Sende-Signals in Form einer Wechselspannung in die Fahrschienen des Gleisabschnitts, einem ersten Empfänger zum Empfangen eines durch die Übertragung des Sende-Signals über die Fahrschienen eines ersten Teils des Gleisabschnitts bewirkten ersten Empfangs-Signals und einem zweiten Empfänger zum Empfangen eines durch die Übertragung des Sende-Signals über die Fahrschienen eines zweiten Teils des Gleisabschnitts bewirkten zweiten Empfangs-Signals, wobei die Vorrichtung zum Bestimmen der Phasenverschiebung zwischen dem ersten Empfangs-Signal und dem zweiten Empfangs-Signal ausgebildet ist.This object is achieved by a device for detecting the busy or idle state of a track section with a transmitter for feeding a transmission signal in the form of an AC voltage in the rails of the track section, a first receiver for receiving a through the transmission of the transmission signal via the rails of a first part of the track section caused the first reception signal and a second receiver to receive a second reception signal caused by the transmission of the transmission signal via the rails of a second part of the track section, the device for determining the Phase shift between the first receive signal and the second receive signal is formed.

Bei der erfindungsgemäßen Lösung besteht aufgrund dessen, dass die Vorrichtung einen Sender sowie zumindest zwei Empfänger aufweist, die Möglichkeit, die Phasenverschiebung zwischen dem ersten Empfangs-Signal und dem zweiten Empfangs-Signal zu bestimmen. Hierdurch wird auf besonders effiziente und einfache Art und Weise eine Fehlerüberwachung der Vorrichtung, insbesondere hinsichtlich von Kabelfehlern, ermöglicht. Dabei liegt der erfindungsgemäßen Lösung die Idee zugrunde, dass die Bestimmung der Phasenverschiebung zwischen den verwendeten Signalen es erlaubt, Abweichungen beziehungsweise Störungen oder Fehler, insbesondere bezüglich des Laufwegs der Signale, zu erkennen.In the solution according to the invention, due to the fact that the device has a transmitter as well as at least two receivers, it is possible to determine the phase shift between the first receive signal and the second receive signal. As a result, an error monitoring of the device, in particular with regard to cable faults, is made possible in a particularly efficient and simple manner. The solution according to the invention is based on the idea that the determination of the phase shift between the signals used makes it possible to detect deviations or disturbances or errors, in particular with regard to the path of the signals.

Die erfindungsgemäße Vorrichtung ist weiterhin dahingehend vorteilhaft, dass die Auswertung der Phasenverschiebung zwischen den Empfangs-Signalen unabhängig von der Verarbeitung und Auswertung der eigentlichen Freimeldungsinformation erfolgen kann. Daher wird es insbesondere ermöglicht, zwischen einem Defekt, etwa in Form eines Kabelfehlers, und einer Belegtmeldung aufgrund einer Achseinwirkung zu unterscheiden. Hierbei ist zu berücksichtigen, dass mit der Phasenverschiebung zwischen den Empfangs-Signalen ein Parameter zur Fehlererkennung verwendet wird, der im Rahmen der Detektion des Belegt- oder Freizustands des Gleisabschnitts keine Anwendung findet.The device according to the invention is furthermore advantageous in that the evaluation of the phase shift between the received signals can be carried out independently of the processing and evaluation of the actual message information. Therefore, it is possible in particular to distinguish between a defect, such as in the form of a cable fault, and a busy message due to an axle action. It should be noted that with the phase shift between the reception signals, a parameter for error detection is used, which does not apply in the context of the detection of the busy or free state of the track section.

Ein weiterer Vorteil ist darin zu sehen, dass im Unterschied zu sonstigen denkbaren Schaltungen zur Überwachung der Kabel beziehungsweise der Leitungen in dem Kabel beziehungsweise in den Kabeln vorteilhafterweise kaum beziehungsweise keine zusätzlichen Schaltungsteile benötigt werden, so dass die erfindungsgemäße Vorrichtung besonders kostengünstig realisierbar ist. Aufgrund dessen, dass Fehler zuverlässig erkannt werden können, ist es darüber hinaus denkbar, dass die Forderung nach einer getrennten Leitungsführung von Sende- und Empfangsleitungen, d.h. von Leitungen, die vom Gleis zum Sender oder Empfänger führen, entfallen könnte. Eine solche, durch die erfindungsgemäße Vorrichtung grundsätzlich ermöglichte Änderung würde zu einer erheblichen Vereinfachung der Verkabelung der Eisenbahnüberwachungsanlage in Form der Vorrichtung zur Detektion des Belegt- oder Freizustandes des Gleisabschnitts führen.Another advantage is the fact that, in contrast to other conceivable circuits for monitoring the cables or lines in the cable or in the cables advantageously little or no additional circuit parts are needed, so that the inventive Device is particularly cost feasible. Due to the fact that errors can be detected reliably, it is also conceivable that the requirement for a separate routing of transmitting and receiving lines, ie lines leading from the track to the transmitter or receiver, could be omitted. Such a modification made possible in principle by the device according to the invention would lead to a considerable simplification of the cabling of the railway monitoring installation in the form of the device for detecting the occupied or free state of the track section.

An dieser Stelle sei generell angemerkt, dass es bei der erfindungsgemäßen Lösung nicht erforderlich ist, dass der Sender sowie die zumindest zwei Empfänger der Vorrichtung unmittelbar am Gleis angeordnet sind. So werden die genannten Komponenten sowie Mittel zum Bestimmen der Phasenverschiebung zwischen den jeweiligen Signalen, d.h. beispielsweise eine entsprechend ausgeführte Auswerte-Einrichtung, vorzugsweise der Innenanlage zugeordnet, d.h. beispielsweise in einem Stellwerk installiert beziehungsweise untergebracht.It should generally be noted at this point that in the solution according to the invention it is not necessary that the transmitter and the at least two receivers of the device are arranged directly on the track. Thus, said components and means for determining the phase shift between the respective signals, i. For example, a correspondingly designed evaluation device, preferably assigned to the indoor unit, i. For example, installed or housed in a signal box.

Vorzugsweise erfolgt mittels der erfindungsgemäßen Vorrichtung eine kontinuierliche Bestimmung der Phasenverschiebung zwischen den Empfangs-Signalen. Hierdurch wird vorteilhafterweise eine permanente Funktionsüberwachung der Vorrichtung sichergestellt. Alternativ hierzu ist es grundsätzlich jedoch beispielsweise auch möglich, dass die Phasenverschiebung zwischen den jeweiligen Signalen lediglich im Rahmen des Ablaufs eines Funktionstests der Vorrichtung bestimmt wird. So könnte ein entsprechender Funktionstest in Abhängigkeit von den jeweiligen Anforderungen beispielsweise minütlich, stündlich oder täglich durchgeführt werden.Preferably, by means of the device according to the invention, a continuous determination of the phase shift between the received signals. As a result, a permanent functional monitoring of the device is advantageously ensured. Alternatively, however, in principle it is also possible, for example, for the phase shift between the respective signals to be determined only within the framework of the course of a functional test of the device. Thus, a corresponding function test could be performed, for example, every minute, hourly or daily depending on the respective requirements.

Weiterhin sei angemerkt, dass die erfindungsgemäße Vorrichtung besonders vorteilhaft im Zusammenhang mit Tonfrequenz-Gleisstromkreisen einsetzbar ist, da hier bereits das zur Detektion des Belegt- oder Freizustands des Gleisabschnitts verwendete Signal ein Wechselspannungs-Signal ist. Grundsätzlich ist es jedoch auch möglich, dass die erfindungsgemäße Vorrichtung im Zusammenhang mit solchen Gleisstromkreisen eingesetzt wird, die mit einer Signalfrequenz unterhalb oder oberhalb des Hörtonbereichs oder auch nach einem Gleichstromprinzip arbeitet. In letzterem Fall handelt es sich bei dem Sende-Signal in Form der Wechselspannung um ein dem zur Detektion verwendeten Gleichstrom überlagertes Signal, das ausschließlich der Funktionsüberwachung der Vorrichtung durch Bestimmen der Phasenverschiebung zwischen zwei Empfangs-Signalen dient. In einem solchen Fall kann ein entsprechendes Sende-Signal in Form einer Wechselspannung entweder permanent dem Gleichstrom überlagert werden oder aber beispielsweise in vorgegebenen zeitlichen Abständen lediglich zur Funktionsüberprüfung zusätzlich eingespeist werden.It should also be noted that the device according to the invention can be used particularly advantageously in conjunction with audio frequency track circuits, since the signal used to detect the busy or free state of the track section is already an AC signal. In principle, however, it is also possible for the device according to the invention to be used in conjunction with such track circuits which operate with a signal frequency below or above the audible tone range or else according to a direct current principle. In the latter case, the transmission signal in the form of the alternating voltage is a signal which is superimposed on the direct current used for the detection and serves exclusively to monitor the function of the device by determining the phase shift between two reception signals. In such a case, a corresponding transmission signal in the form of an alternating voltage can either be permanently superimposed on the direct current or, for example, additionally fed in at predetermined time intervals merely for functional testing.

Gemäß einer besonders bevorzugten Ausführungsform ist die erfindungsgemäße Vorrichtung zum Vergleichen der Phasenverschiebung mit zumindest einer Referenz-Phasenverschiebung ausgebildet. Dies ist vorteilhaft, da hierdurch eine besonders einfache Auswertung der Phasenverschiebung ermöglicht wird. So kann beispielsweise vor Inbetriebnahme der Vorrichtung eine Bestimmung der Phasenverschiebung zwischen den Empfangs-Signalen im funktionstüchtigen, fehlerfreien Zustand der Vorrichtung zur Detektion des Belegt- oder Freizustands eines Gleisabschnitts vorgenommen werden. Diese Phasenverschiebung kann sodann in Form der Referenz-Phasenverschiebung, gegebenenfalls unter Berücksichtigung von Toleranzwerten, beispielsweise in einer Speicher-Einrichtung der Vorrichtung abgelegt werden. Im späteren Betrieb der Vorrichtung kann somit anhand eines einfachen Vergleichs der Phasenverschiebung mit der so zuvor bestimmten Referenz-Phasenverschiebung ein Fehler unmittelbar und eindeutig erkannt werden.According to a particularly preferred embodiment, the inventive device for comparing the phase shift is formed with at least one reference phase shift. This is advantageous because it allows a particularly simple evaluation of the phase shift. Thus, for example, before the device is put into operation, a determination of the phase shift between the received signals in the functional, error-free state of the device for detecting the busy or free state of a track section can be made. This phase shift can then be stored in the form of the reference phase shift, optionally taking into account tolerance values, for example in a memory device of the device. In the later operation of the device Thus, based on a simple comparison of the phase shift with the previously determined reference phase shift, an error can be detected directly and unambiguously.

Unabhängig davon, wie im konkreten Fall anhand der bestimmten Phasenverschiebung ein Fehler beziehungsweise eine Störung erkannt wird, wird der betroffene, zugehörige Gleisabschnitt bei Auftreten eines Fehlers zur Gefährdungsvermeidung vorzugsweise vorsorglich umgehend als belegt gemeldet.Regardless of how an error or a fault is detected in the specific case on the basis of the specific phase shift, the affected, associated track section is preferably as a precaution immediately reported as busy in the event of an error to avoid hazards.

Alternativ zu der Bestimmung der Referenz-Phasenverschiebung vor Inbetriebnahme der Gleisfreimeldeeinrichtung in Form der Vorrichtung zur Detektion des Belegt- oder Freizustands eines Gleisabschnitts wäre eine Überwachung der Phasenverschiebung zwischen dem ersten und dem zweiten Empfangs-Signal beispielsweise auch dadurch möglich, dass permanent ein Vergleich der aktuellen Phasenverschiebung mit einer Referenz-Phasenverschiebung in Form des zuletzt bestimmten Wertes der Phasenverschiebung erfolgt. Auch hierdurch wird es ermöglicht, eine Änderung der Phasenverschiebung unmittelbar und ohne zeitliche Verzögerung zu erkennen.As an alternative to the determination of the reference phase shift before commissioning of the track-free reporting device in the form of the device for detecting the busy or free state of a track section, monitoring of the phase shift between the first and the second receive signal would also be possible, for example, by permanently comparing the current one Phase shift takes place with a reference phase shift in the form of the last determined value of the phase shift. This also makes it possible to detect a change in the phase shift immediately and without delay.

Vorzugsweise kann die erfindungsgemäße Vorrichtung auch derart weitergebildet sein, dass sie basierend auf dem Vergleich zwischen der Phasenverschiebung und der Referenz-Phasenverschiebung zum Erzeugen eines einen Störzustand anzeigenden Fehler-Signals ausgebildet sind. Mittels des Fehler-Signals besteht somit vorteilhafterweise die Möglichkeit, beispielsweise Betriebspersonal eines Stellwerkes unmittelbar auf das Vorliegen eines Fehlerfalls hinzuweisen.Preferably, the device according to the invention can also be developed in such a way that, based on the comparison between the phase shift and the reference phase shift, they are designed to generate an error signal indicating an interference condition. By means of the error signal is thus advantageously the possibility, for example, to alert operating personnel of a signal box directly to the presence of an error.

Ein einen Störzustand beziehungsweise Fehler anzeigendes Fehler-Signal, das seitens der Vorrichtung basierend auf dem Vergleich zwischen der Phasenverschiebung und der Referenz-Phasenverschiebung erzeugt worden ist, kann auf unterschiedliche Art ausgegeben werden. So wäre es grundsätzlich denkbar, dass lediglich ein entsprechender Eintrag in einem Logfile erfolgt. In einer weiteren besonders bevorzugten Ausführungsform ist die jeweilige erfindungsgemäße Vorrichtung zum Ausgeben des Fehlersignals in Form einer optischen und/oder akustischen Warnmeldung ausgebildet. Hierdurch wird vorteilhafterweise auf besonders zuverlässige Weise die Aufmerksamkeit des Bedienpersonals, d.h. beispielsweise des Bedienpersonals eines Stellwerks, erzielt.An error signal indicating a fault condition generated by the apparatus based on the Comparison between the phase shift and the reference phase shift has been generated, can be output in different ways. So it would be conceivable in principle that only a corresponding entry is made in a log file. In a further particularly preferred embodiment, the respective device according to the invention for outputting the error signal is designed in the form of an optical and / or acoustic warning message. As a result, the attention of the operating personnel, ie, for example, the operator of a signal box, is advantageously achieved in a particularly reliable manner.

Gemäß einer besonders bevorzugten Weiterbildung der erfindungsgemäßen Vorrichtung ist der Sender zum Einspeisen eines mittels einer Modulation codierten Sende-Signals in die Fahrschienen des Gleisabschnitts ausgebildet und die Vorrichtung zum Vergleichen der Modulation zumindest eines der Empfangs-Signale mit der Modulation des Sende-Signals ausgebildet. Generell ist die Verwendung eines mittels einer Modulation codierten Sende-Signals vorteilhaft, da hierdurch die Unempfindlichkeit gegenüber Störbeeinflussungen erhöht wird. Durch den Vergleich der Modulationen des Empfangs-Signals und des Sende-Signals wird dabei die Zusammengehörigkeit der beiden Signale auf besonders einfache Weise verifiziert. Dies geschieht, ohne dass hierfür starre, fest vorgegebene, der jeweiligen Vorrichtung fest zugeordnete Codierungen, etwa in Form von Bit-Mustern, erforderlich sind. Hierdurch entfallen vorteilhafterweise auch entsprechende Aufwände zur Projektierung der einzelnen Vorrichtungen, wodurch sich die Herstellungskosten der Vorrichtung reduzieren. Weiterhin vereinfacht sich auch die Montage, wodurch sich zusätzlich eine Zeit- und damit Kostenersparnis ergibt. Darüber hinaus vereinfacht sich auch die Projektierung einer Eisenbahnüberwachungsanlage, da keine Zuordnungen von Codierungen beziehungsweise Modulationen zu Vorrichtungen vorzusehen sind und daher auch entsprechende Zuordnungen nicht auf Lageplänen und Datenblättern zu hinterlegen und im Folgenden zu beachten sind. Weiterhin entfallen vorteilhafterweise auch jegliche Einschränkungen hinsichtlich der Anzahl und der Art der zur Codierung verwendeten Modulationen, so dass die Voraussetzung dafür geschaffen wird, dass eine Mehrfachverwendung gleicher Modulationen innerhalb einer Anlage ausgeschlossen werden kann. Hierzu kann die erfindungsgemäße Vorrichtung vorzugsweise zum Erzeugen eines mittels einer beliebigen, insbesondere zufallsbasiert generierten, Modulation codierten Sende-Signals ausgebildet sein. Sofern beim Vergleichen der Modulation des Empfangs-Signals mit der Modulation des Sende-Signals eine Abweichung der Modulationen festgestellt wird, wird der der Vorrichtung zugeordnete Gleisabschnitt zwecks Gefährdungsvermeidung vorzugsweise umgehend als belegt gemeldet.According to a particularly preferred development of the device according to the invention, the transmitter is designed to feed a modulation signal encoded transmit signal into the rails of the track section and the device for comparing the modulation of at least one of the receive signals formed with the modulation of the transmit signal. In general, the use of a modulation signal encoded transmit signal is advantageous because it increases the insensitivity to interference. By comparing the modulations of the reception signal and the transmission signal while the togetherness of the two signals is verified in a particularly simple manner. This is done without the need for rigid, fixed predetermined, the respective device permanently assigned codings, such as in the form of bit patterns, are required. This advantageously also eliminates corresponding expenses for the configuration of the individual devices, which reduces the manufacturing cost of the device. Furthermore, the assembly is simplified, resulting in addition a time and cost savings. In addition, the project planning of a railway monitoring system is simplified, as there are no assignments of codes or modulations are to be provided to devices and therefore also not to deposit corresponding maps on site plans and data sheets and are observed below. Furthermore, any restrictions with regard to the number and type of modulation used for coding are advantageously eliminated, so that the prerequisite is created that a multiple use of the same modulations within a plant can be ruled out. For this purpose, the device according to the invention can preferably be designed to generate a transmission signal coded by means of any modulation, in particular random-based, modulation. If, when comparing the modulation of the receive signal with the modulation of the transmit signal, a deviation of the modulations is detected, the track section assigned to the device is preferably immediately reported as busy for the purpose of avoiding danger.

Vorzugsweise kann die erfindungsgemäße Vorrichtung auch derart weitergebildet sein, dass die jeweilige Vorrichtung zur Übertragung von Datensignalen über die Fahrschienen des Gleisabschnitts an ein den Gleisabschnitt belegendes Schienenfahrzeug ausgebildet ist. Dies ist vorteilhaft, da somit die Vorrichtung zusätzlich zur Informationsübertragung an ein Schienenfahrzeug verwendet werden kann. Hierdurch werden beispielsweise Anwendungen im Bereich der linienförmigen Zugbeeinflussung unterstützt. Eine entsprechend weitergebildete Vorrichtung kann vorteilhafterweise derart ausgebildet sein, dass Sender und Empfänger derart an die jeweiligen gleisseitigen Einspeisestellen, etwa in Form so genannter Gleisanschlussgehäuse, angebunden sind, dass in die Einspeisestellen wahlweise entweder ein Sende-Signal eines Senders eingespeist oder ein Empfangs-Signal für einen Empfänger ausgelesen beziehungsweise empfangen werden kann. Eine solche für sich bekannte Umschaltung ist vorteilhaft, da die Übertragung von Datensignalen an ein Schienenfahrzeug nur möglich ist, solange sich der Sender in Fahrtrichtung vor dem Schienenfahrzeug befindet. Ursache hierfür ist, dass anderenfalls durch ein Kurzschließen der Fahrschienen durch die Achsen des Schienenfahrzeugs auch die Übertragung von Datensignalen an eine üblicherweise im vorderen Bereich eines Schienenfahrzeugs angeordnete Empfangs-Einrichtung verhindert wird. In diesem Zusammengang sei darauf hingewiesen, dass die erfindungsgemäße Vorrichtung auch dahingehend vorteilhaft ist, dass die Bestimmung der Phasenverschiebung zwischen den beiden Empfangs-Signalen unabhängig von der Fahrtrichtung und der Position des Schienenfahrzeugs in dem Gleisabschnitt auf dieselbe Art und Weise möglich ist.Preferably, the device according to the invention can also be developed in such a way that the respective device for transmitting data signals via the rails of the track section is formed on a railway vehicle occupying the track section. This is advantageous, since thus the device can be used in addition to the information transmission to a rail vehicle. This supports, for example, applications in the area of linear train control. A correspondingly further developed device can advantageously be designed such that the transmitter and receiver are connected to the respective track-side feed points, for example in the form of so-called track terminal housing, such that either a transmit signal of a transmitter or a receive signal for either fed into the feed points a receiver can be read or received. Such a known switching is advantageous because the transmission of Data signals to a rail vehicle is only possible as long as the transmitter is in the direction of travel in front of the rail vehicle. The reason for this is that otherwise by a short-circuiting of the rails through the axes of the rail vehicle and the transmission of data signals to a usually arranged in the front region of a rail vehicle receiving device is prevented. In this connection, it should be pointed out that the device according to the invention is also advantageous in that the determination of the phase shift between the two reception signals is possible in the same way regardless of the direction of travel and the position of the rail vehicle in the track section.

Die vorliegende Erfindung betrifft darüber hinaus ein Verfahren zum Betreiben einer Vorrichtung zur Detektion des Belegtoder Freizustands eines Gleisabschnitts.The present invention further relates to a method of operating a device for detecting the occupancy or free state of a track section.

Hinsichtlich des Verfahrens liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein Verfahren zum Betreiben einer Vorrichtung zur Detektion des Belegt- oder Freizustands eines Gleisabschnitts anzugeben, das es erlaubt, Fehler, insbesondere vorrichtungsseitige Kabelfehler, besonders zuverlässig und zugleich kostengünstig zu erkennen.With regard to the method, the present invention has the object to provide a method for operating a device for detecting the busy or free state of a track section, which makes it possible to detect errors, especially device-side cable fault, particularly reliable and cost-effective.

Diese Aufgabe wird erfindungsgemäß gelöst durch ein Verfahren zum Betreiben einer Vorrichtung zur Detektion des Belegtoder Freizustandes eines Gleisabschnitts, wobei ein Sende-Signal in Form einer Wechselspannung in die Fahrschienen des Gleisabschnitts eingespeist wird, ein durch die Übertragung des Sende-Signals über die Fahrschienen eines ersten Teils des Gleisabschnitts bewirktes erstes Empfangs-Signal empfangen wird, ein durch die Übertragung des Sende-Signals über die Fahrschienen eines zweiten Teils des Gleisabschnitts bewirktes zweites Empfangs-Signal empfangen wird und die Phasenverschiebung zwischen dem ersten Empfangs-Signal und dem zweiten Empfangs-Signal bestimmt wird.This object is achieved by a method for operating a device for detecting the busy or free state of a track section, wherein a transmission signal is fed in the form of an AC voltage in the rails of the track section, a through the transmission of the transmission signal on the rails of a first Part of the track section effected received first received signal, one caused by the transmission of the transmission signal on the rails of a second part of the track section second receive signal is received and the phase shift between the first receive signal and the second receive signal is determined.

Die Vorteile des erfindungsgemäßen Verfahrens entsprechen im Wesentlichen denjenigen der erfindungsgemäßen Vorrichtung, so dass diesbezüglich auf die entsprechenden vorstehenden Ausführungen verwiesen wird. Gleiches gilt hinsichtlich der im Folgenden genannten bevorzugten Weiterbildungen des erfindungsgemäßen Verfahrens, bezüglich derer dementsprechend ebenfalls auf die entsprechenden Ausführungen im Zusammenhang mit der jeweiligen bevorzugten Weiterbildung der erfindungsgemäßen Vorrichtung verwiesen wird.The advantages of the method according to the invention essentially correspond to those of the device according to the invention, so that in this regard reference is made to the corresponding explanations above. The same applies to the below-mentioned preferred developments of the method according to the invention, with respect to which reference is likewise made to the corresponding statements in connection with the respective preferred development of the device according to the invention.

Vorzugsweise ist das erfindungsgemäße Verfahren derart ausgestaltet, dass die Phasenverschiebung mit zumindest einer Referenz-Phasenverschiebung verglichen wird.Preferably, the inventive method is designed such that the phase shift is compared with at least one reference phase shift.

Gemäß einer weiteren besonders bevorzugten Ausführungsform ist das erfindungsgemäße Verfahren derart ausgestaltet, dass basierend auf dem Vergleich zwischen der Phasenverschiebung und der Referenz-Phasenverschiebung ein einen Störzustand anzeigendes Fehler-Signal erzeugt wird.According to a further particularly preferred embodiment, the method according to the invention is configured in such a way that an error signal indicating a fault condition is generated based on the comparison between the phase shift and the reference phase shift.

Vorzugsweise kann das erfindungsgemäße Verfahren auch derart ablaufen, dass das Fehler-Signal in Form einer optischen und/oder akustischen Warnmeldung ausgegeben wird.Preferably, the inventive method can also run such that the error signal is output in the form of an optical and / or acoustic warning message.

Vorteilhafterweise ist das erfindungsgemäße Verfahren derart ausgestaltet, dass ein mittels einer Modulation codiertes Sende-Signal in die Fahrschienen des Gleisabschnitts eingespeist wird und die Modulation des Empfangs-Signals beziehungsweise die Modulation zumindest eines der Empfangs-Signale mit der Modulation des Sende-Signals verglichen wird.Advantageously, the inventive method is configured such that a coded by a modulation transmission signal is fed into the rails of the track section and the modulation of the receive signal or the modulation of at least one of the receive signals is compared with the modulation of the transmit signal.

Gemäß einer weiteren besonders bevorzugten Weiterbildung des erfindungsgemäßen Verfahrens werden über die Fahrschienen des Gleisabschnitts Daten-Signale an ein den Gleisabschnitt belegendes Schienenfahrzeug übertragen.According to a further particularly preferred development of the method according to the invention, data signals are transmitted to a rail vehicle occupying the track section via the rails of the track section.

Im Folgenden wird die Erfindung anhand von Ausführungsbeispielen näher erläutert. Hierzu zeigt

Figur 1
eine schematische Skizze einer Anordnung mit einem Gleisabschnitt sowie einer Vorrichtung mit einem Sender und einem Empfänger,
Figur 2
eine schematische Skizze einer Anordnung mit einem mittengespeisten Gleisabschnitt und einem ersten Ausführungsbeispiel der erfindungsgemäßen Vorrichtung mit einem Sender und zwei Empfängern,
Figur 3
eine schematische Skizze einer Anordnung mit einem Gleisabschnitt in Form einer Weiche und einem zweiten Ausführungsbeispiel der erfindungsgemäßen Vorrichtung mit einem Sender und zwei Empfängern und
Figur 4
in einer schematischen Darstellung zur Verdeutlichung eines Ausführungsbeispiels des erfindungsgemäßen Verfahrens einen Graphen mit einem Sende-Signal sowie zwei Empfangs-Signalen.
In the following the invention will be explained in more detail by means of exemplary embodiments. This shows
FIG. 1
a schematic sketch of an arrangement with a track section and a device with a transmitter and a receiver,
FIG. 2
1 is a schematic sketch of an arrangement with a center-fed track section and a first exemplary embodiment of the device according to the invention with a transmitter and two receivers,
FIG. 3
a schematic sketch of an arrangement with a track section in the form of a switch and a second embodiment of the device according to the invention with a transmitter and two receivers and
FIG. 4
in a schematic representation to illustrate an embodiment of the method according to the invention a graph with a transmit signal and two receive signals.

In den Figuren werden aus Gründen der Übersichtlichkeit für gleiche oder gleich wirkende Komponenten dieselben Bezugszeichen verwendet.For the sake of clarity, the same reference numerals are used in the figures for identical or identically acting components.

Figur 1 zeigt eine schematische Skizze einer Anordnung mit einem Gleisabschnitt sowie einer Vorrichtung mit einem Sender und einem Empfänger. Dargestellt ist eine Vorrichtung V zur Detektion des Belegt- oder Freizustands eines Gleisabschnitts G. Die Vorrichtung V weist einen Sender S zum Einspeisen eines Sende-Signals SIGS in Form einer Wechselspannung in die Fahrschienen F des Gleisabschnitts G auf. Darüber hinaus weist die Vorrichtung V einen Empfänger E zum Empfangen eines durch die Übertragung des Sende-Signals SIGS über die Fahrschienen F des Gleisabschnitts G bewirkten Empfangs-Signals SIGE auf. FIG. 1 shows a schematic sketch of an arrangement with a track section and a device with a transmitter and a receiver. Shown is a device V for detecting the busy or free state of a track section G. The device V has a transmitter S for feeding a transmission signal SIG S in the form of an AC voltage in the rails F of the track section G. In addition, the device V a receiver E for receiving a caused by the transmission of the transmission signal SIG S on the rails F of the track section G reception signal SIG E.

Entsprechend der Darstellung in Figur 1 wird in den Gleisabschnitt G eine Wechselspannung der Frequenz f1 eingespeist. Um eine zuverlässige Unterscheidung der jeweiligen Signale zu ermöglichen, werden die benachbarten Gleisabschnitte mit einer Wechselspannung unterschiedlicher Frequenz f5 beziehungsweise f3 betrieben. Im Folgenden sei angenommen, dass es sich bei der in der Figur gezeigten Anordnung um einen Tonfrequenz-Gleisstromkreis mit mehreren Frequenzen handelt, bei dem eine Wechselspannung in Form eines Sende-Signals SIGS im Tonfrequenzbereich in die Fahrschienen F des Gleisabschnitts G eingespeist wird.As shown in FIG. 1 an AC voltage of the frequency f1 is fed into the track section G. In order to enable a reliable differentiation of the respective signals, the adjacent track sections are operated with an alternating voltage of different frequency f5 or f3. In the following, it is assumed that the arrangement shown in the figure is an audio frequency track circuit with a plurality of frequencies, in which an AC voltage in the form of a transmission signal SIG S in the audio frequency range is fed into the tracks F of the track section G.

Die Vorrichtung V kann beispielsweise in einem Stellwerk einer Eisenbahnanlage beziehungsweise einer Eisenbahnüberwachungsanlage angeordnet sein. Dies bietet den Vorteil, dass eine besonders hohe Zuverlässigkeit erreicht wird, da sich mechanische Beanspruchung und klimatische Einflüsse bezogen auf die elektronischen Komponenten der Vorrichtung V geringer auswirken, als dies im Falle einer Unterbringung dieser Komponenten in Gleisnähe der Fall wäre. Darüber hinaus ergeben sich hierdurch weitere Vorteile hinsichtlich der Verfügbarkeit und Wartung der Vorrichtung V, d.h. insbesondere des Senders S sowie des Empfängers E. Mittels der waagerechten strichpunktierten Linie ist in Figur 1 eine entsprechende Trennung zwischen der Innenanlage, der die Vorrichtung V zugeordnet ist, und der Außenanlage, zu der der Gleisabschnitt G gehört, angedeutet.The device V can be arranged for example in a signal box of a railway installation or a railway monitoring system. This offers the advantage that a particularly high level of reliability is achieved, since mechanical load and climatic influences with respect to the electronic components of the device V have a lower effect than would be the case if these components were accommodated close to the track. In addition, this results in further advantages in terms of availability and maintenance of the device V, ie in particular the transmitter S and the receiver E. By means of the horizontal dot-dash line is in FIG. 1 a corresponding separation between the indoor unit, which is associated with the device V, and the outdoor area, to which the track section G belongs, indicated.

Entsprechend der Darstellung in Figur 1 sind gleisseitig Gleisanschlussgehäuse GAG1, GAG2 angeordnet, die zum Einbringen des durch den Sender S eingespeisten beziehungsweise bereitgestellten Sende-Signals SIGS beziehungsweise zum Auslesen des an den Empfänger E übermitteln Empfangs-Signals SIGE in beziehungsweise aus den Fahrschienen F dienen. Üblicherweise enthalten die Gleisanschlussgehäuse GAG1, GAG2 hierbei keine aktiven elektronischen Komponenten, sondern im Wesentlichen lediglich einen Schwingkreis zum frequenzselektiven Verstärken der ein- beziehungsweise ausgespeisten Signale vorgegebener Nutzfrequenz, d.h. im Falle des in Figur 1 dargestellten Gleisabschnitts G der Frequenz f1.As shown in FIG. 1 are trackside siding housing Gag1, GAG2 disposed, which serve for introducing the injected by the transmitter S respectively provided transmission signal SIG S respectively for reading out the transmit to the receiver E reception signal SIG E into or out of the rails F. Usually, the track connection housing GAG1, GAG2 hereby contain no active electronic components, but essentially only a resonant circuit for frequency-selective amplification of the input or output signals of predetermined useful frequency, ie in the case of in FIG. 1 shown track section G of the frequency f1.

Um eine Überwachung von Störungen beziehungsweise Fehlern, insbesondere hinsichtlich der Kabel beziehungsweise Leitungen von dem Sender S zum Gleisanschlussgehäuse GAG1 beziehungsweise vom Gleisanschlussgehäuse GAG2 zum Empfänger E zu ermöglichen, weist die Vorrichtung V weiterhin eine AuswerteEinrichtung AE auf, die zum Bestimmen der Phasenverschiebung zwischen dem von dem Sender S gesendeten Sende-Signal SIGS und dem von dem Empfänger E empfangenen Empfangs-Signal SIGE dient. Hierzu empfängt die Auswerte-Einrichtung AE das Sende-Signal SIGS von dem Sender S und das Empfangs-Signal SIGE von dem Empfänger E und führt eine vorzugsweise signaltechnisch sichere Bestimmung der Phasenverschiebung zwischen den beiden Signalen SIGS, SIGE durch. Dabei ist die Vorrichtung V beziehungsweise die Auswerte-Einrichtung AE zum Vergleichen der ermittelten Phasenverschiebung mit zumindest einer ReferenzPhasenverschiebung ausgebildet. Bei der Referenz-Phasenverschiebung handelt es sich vorzugsweise um den im fehlerlosen Zustand der Anlage gemessen Wert der Phasenverschiebung zwischen dem Sende-Signal SIGS und dem Empfangs-Signal.In order to allow monitoring of faults or faults, in particular with regard to the cables or lines from the transmitter S to the track connection housing GAG1 or from the track connection housing GAG2 to the receiver E, the device V further comprises an evaluation device AE, which is used to determine the phase shift between that of the Transmitter S transmitted transmit signal SIG S and received by the receiver E receive signal SIG E is used. For this purpose, the evaluation device AE receives the transmission signal SIG S from the transmitter S and the reception signal SIG E from the receiver E and carries out a preferably signal-technically reliable determination of the phase shift between the two signals SIG S , SIG E. In this case, the device V or the evaluation device AE for comparing the determined phase shift formed with at least one reference phase shift. The reference phase shift is preferably the value of the phase shift between the transmit signal SIG S and the receive signal measured in the error-free state of the system.

Störungen, beispielsweise aufgrund des Übersprechens der Signale benachbarter Gleisstromkreise, etwa aufgrund von Beschädigungen einer elektrischen Leitung, können nun vorteilhafterweise anhand des Vergleichs der Phasenverschiebung mit der Referenz-Phasenverschiebung zuverlässig erkannt werden. Bei Erkennen eines entsprechenden Fehlers meldet die Auswerte-Einrichtung AE der Vorrichtung V den Gleisabschnitt G vorsorglich als belegt und erzeugt ein Fehler-Signal, das den betreffenden Störzustand anzeigt. Hierzu kann das Fehler-Signal beispielsweise in Form einer optischen und/oder akustischen Warnmeldung ausgegeben werden. Hierbei wird vorteilhafterweise eine zuverlässige Unterscheidung zwischen einer Störung, d.h. einem Kabelfehler, und einer regulären Freioder Belegtmeldung ermöglicht. Darüber hinaus kann die Bestimmung der Phasenverschiebung sowie der Vergleich mit der Referenz-Phasenverschiebung vorteilhafterweise auf vergleichsweise aufwandsarme Art und Weise realisiert werden, so dass keine oder kaum zusätzliche Schaltungskomponenten benötigt werden, wodurch im Vergleich zu anderen denkbaren Lösungen eine Kosteneinsparung erzielt wird.Disturbances, for example due to the crosstalk of the signals of adjacent track circuits, for example due to damage to an electrical line, can now advantageously be reliably detected on the basis of the comparison of the phase shift with the reference phase shift. Upon detection of a corresponding error reports the evaluation device AE of the device V, the track section G precaution as occupied and generates an error signal indicating the relevant fault condition. For this purpose, the error signal can be output, for example, in the form of an optical and / or acoustic warning message. Here, advantageously, a reliable distinction between a disturbance, i. a cable error, and a regular free-busy message allows. In addition, the determination of the phase shift and the comparison with the reference phase shift can advantageously be realized in a comparatively low-cost manner, so that little or no additional circuit components are needed, which results in cost savings compared to other conceivable solutions.

Es sei nachdrücklich darauf hingewiesen, dass es sich bei der Darstellung in Figur 1 lediglich um eine schematische Darstellung handelt. So können in der Praxis weitere Komponenten vorhanden beziehungsweise erforderlich sein, die in Figur 1 aus Gründen der Übersichtlichkeit nicht dargestellt sind. So ist es beispielsweise denkbar, dass die Vorrichtung V zusätzlich zur Übertragung von Datensignalen über die Fahrschienen F des Gleisabschnitts G an ein den Gleisabschnitt G belegendes Schienenfahrzeug ausgebildet ist. In diesem Fall weist der Sender S der Vorrichtung V vorteilhafterweise eine externe Ansteuerung auf, mittels derer die Datensignale dem Sender S zugeführt werden können.It should be emphasized that the illustration in FIG. 1 is only a schematic representation. Thus, in practice, other components may be present or required, which in FIG. 1 are not shown for reasons of clarity. So it is conceivable, for example, that the device V in addition to the transmission of data signals on the rails F of the track section G is formed on a the track section G occupying rail vehicle. In this case, the transmitter S of the device V advantageously has an external drive, by means of which the data signals can be supplied to the transmitter S.

Figur 2 zeigt eine schematische Skizze einer Anordnung mit einem mittengespeisten Gleisabschnitt und einem ersten Ausführungsbeispiel der erfindungsgemäßen Vorrichtung mit einem Sender und zwei Empfängern. Im Unterschied zur Darstellung der Figur 1 handelt es sich bei Figur 2 somit um eine Anordnung mit zwei Empfängern E1, E2. Dabei wird den Empfängern E1, E2 über die Gleisanschlussgehäuse GAG1, GAG3 jeweils ein Empfangs-Signal SIGE, beziehungsweise SIGE2 zugeführt. Der erste Empfänger E1 dient zum Empfang des durch die Übertragung des Sende-Signals SIGS über die Fahrschienen F eines ersten Teils des Gleisabschnitts G bewirkten ersten Empfangs-Signals SIGE1, wobei der erste Teil des Gleisabschnitts durch die Strecke zwischen den Gleisanschlussgehäusen GAG1 und GAG2 gebildet wird. Dementsprechend dient der zweite Empfänger E2 zum Empfang des durch die Übertragung des Sende-Signals SIGS über die Fahrschienen F eines zweiten, durch die Strecke zwischen den Gleisanschlussgehäusen GAG2 und GAG3 gebildeten Teils des Gleisabschnitts G bewirkten zweiten Empfangs-Signals SIGE2. FIG. 2 shows a schematic diagram of an arrangement with a center-fed track section and a first embodiment of the device according to the invention with a transmitter and two receivers. In contrast to the representation of the FIG. 1 is it FIG. 2 thus an arrangement with two receivers E1, E2. In this case, the receivers E1, E2 are each supplied with a receive signal SIG E or SIG E2 via the track connection housings GAG1, GAG3. The first receiver E1 serves to receive the first reception signal SIG E1 caused by the transmission of the transmission signal SIG S via the travel rails F of a first part of the track section G, the first part of the track section passing through the route between the track connection housings GAG1 and GAG2 is formed. Accordingly, the second receiver E2 serves to receive the second reception signal SIG E2 caused by the transmission of the transmission signal SIG S via the travel rails F of a second part of the track section G formed by the route between the track connection housings GAG2 and GAG3.

Basierend auf der in Figur 2 gezeigten Anordnung kann eine Überwachung der Funktionsfähigkeit der Vorrichtung V in Form der Gleisfreimeldeeinrichtung dadurch erfolgen, dass die Phasenverschiebung zwischen dem ersten Empfangs-Signal SIGE1 des Empfängers E1 und dem zweiten Empfangs-Signal SIGE2 des zweiten Empfängers E2 ermittelt wird. Die derart bestimmte Phasenverschiebung erlaubt eine zuverlässige Erkennung von Störungen, insbesondere in Form von Kabelfehlern. Dies ist bei einer Anordnung mit einem Sender S und mehreren Empfängern E1, E2 von besonderer Bedeutung, da insbesondere für den Fall, dass die Leitungen mehrerer Empfänger E1, E2 innerhalb eines Kabels geführt werden, Störungen durch ein Übersprechen beziehungsweise Einkoppeln eines Empfangs-Signals in die Leitung eines anderen Empfängers verursacht werden können. Solche Störungen beziehungsweise Fehler werden mittels der Auswerte-Einrichtung AE der Vorrichtung V durch den Vergleich der Phase zwischen den Empfangs-Signalen SIGE1, SIGE2 untereinander zuverlässig erkannt, so dass auch im Falle von Leitungen mehrerer Empfänger E1, E2, die in demselben Kabel geführt werden, Fehler beziehungsweise Störungen ausgeschlossen werden können.Based on the in FIG. 2 shown arrangement, a monitoring of the functioning of the device V in the form of the track-free reporting device take place in that the phase shift between the first receive signal SIG E1 of the receiver E1 and the second receive signal SIG E2 of the second receiver E2 is determined. The thus determined phase shift allows reliable detection of interference, especially in the form of cable faults. This is included an arrangement with a transmitter S and a plurality of receivers E1, E2 of particular importance, since in particular in the event that the lines of multiple receivers E1, E2 are guided within a cable, interference by crosstalk or coupling a receive signal in the line of other recipient can be caused. Such disturbances or errors are reliably detected by means of the evaluation device AE of the device V by comparing the phase between the received signals SIG E1 , SIG E2 , so that even in the case of lines of several receivers E1, E2, in the same cable be guided, errors or disturbances can be excluded.

Sofern die Vorrichtung mehr als zwei, d.h. beispielsweise drei Empfänger aufweisen würde, so könnte analog zur zuvor beschriebenen Vorgehensweise die Phasenverschiebung einer Kombination oder mehrerer Kombinationen der Empfangs-Signale der Empfänger bestimmt werden.If the device has more than two, i. For example, if there were three receivers, the phase shift of a combination or several combinations of the receive signals of the receivers could be determined analogously to the procedure described above.

Figur 3 zeigt eine schematische Skizze einer Anordnung mit einem Gleisabschnitt in Form einer Weiche und einem zweiten Ausführungsbeispiel der erfindungsgemäßen Vorrichtung mit einem Sender und zwei Empfängern. Ähnlich der Darstellung in Figur 2 handelt es sich hierbei um eine Anordnung mit einer Vorrichtung V mit einem Sender S sowie zwei Empfängern E1, E2. Im dargestellten Fall handelt es sich hierbei um einen Weichenkreis, der zur vollständigen Überwachung einer Weiche W dient. FIG. 3 shows a schematic diagram of an arrangement with a track section in the form of a switch and a second embodiment of the device according to the invention with a transmitter and two receivers. Similar to the illustration in FIG. 2 this is an arrangement with a device V with a transmitter S and two receivers E1, E2. In the case shown, this is a switch circle, which is used to completely monitor a switch W.

Analog zur in Zusammenhang mit Figur 2 beschriebenen Vorgehensweise kann auch bei einer solchen Anordnung durch eine Bestimmung der Phasenverschiebung zwischen den Empfangs-Signalen SIGE1, SIGE2 des ersten Empfängers E1 und des zweiten Empfängers E2 auf zuverlässige Art und Weise sichergestellt werden, dass es sich bei den von den jeweiligen Empfängern E1, E2 empfangenen Empfangs-Signalen SIGE1, SIGE2 auch tatsächlich um das an der vorgesehenen Stelle des Gleisabschnitts G empfangene beziehungsweise ausgelesene, unverfälschte Empfangs-Signal SIGE1 beziehungsweise SIGE2 handelt.Analogous to in connection with FIG. 2 also described in such an arrangement by determining the phase shift between the receive signals SIG E1 , SIG E2 of the first receiver E1 and the second Receiver E2 be ensured in a reliable manner that it is in the received by the respective receivers E1, E2 receive signals SIG E1 , SIG E2 actually at the intended location of the track section G received or read, unadulterated receive signal SIG E1 or SIG E2 acts.

Figur 4 zeigt in einer schematischen Darstellung zur Verdeutlichung eines Ausführungsbeispiels des erfindungsgemäßen Verfahrens einen Graphen mit einem Sende-Signal sowie zwei Empfangs-Signalen. Dargestellt ist hierbei die Amplitude A als Funktion der Zeit t für ein Sende-Signal SIGS, ein erstes Empfangs-Signal SIGE1 sowie ein zweites Empfangs-Signal SIGE2. Entsprechend der Darstellung der Figur 4 unterscheiden sich die dargestellten Signale SIGS, SIGE1, SIGE2 nicht nur hinsichtlich ihrer Amplitude A, sondern insbesondere auch hinsichtlich ihrer Phase. FIG. 4 shows a schematic representation to illustrate an embodiment of the method according to the invention a graph with a transmit signal and two receive signals. Shown here is the amplitude A as a function of time t for a transmit signal SIG S , a first receive signal SIG E1 and a second receive signal SIG E2 . According to the presentation of the FIG. 4 The illustrated signals SIG S , SIG E1 , SIG E2 differ not only in terms of their amplitude A, but in particular also in terms of their phase.

Basierend auf den dargestellten Signalen SIGS, SIGE1, SIGE2 kann daher nun die Phasenverschiebung PHS,E1 zwischen dem Sende-Signal SIGS und dem ersten Empfangs-Signal SIGE1, die Phasenverschiebung PHS,E2 zwischen dem Sende-Signal SIGS und dem zweiten Empfangs-Signal SIGE2 und/oder die Phasenverschiebung PHE1,E2 zwischen dem ersten Empfangs-Signal SIGE1 sowie dem zweiten Empfangs-Signal SIGE2 bestimmt werden. Eine Auswertung der Phasenverschiebungen PHS,E1, PHS,E2, PHE1,E2, beispielsweise durch Vergleich mit einer jeweiligen entsprechenden Referenz-Phasenverschiebung, ermöglicht eine Überprüfung des Signalwegs der jeweiligen Empfangs-Signale SIGE1 oder SIGE2 beziehungsweise beider Empfangs-Signale SIGE1, SIGE2. Entsprechend den vorstehenden Ausführungen können hierbei insbesondere Fehler bezüglich der Kabel beziehungsweise Leitungen zwischen dem Gleis und dem jeweiligen Empfänger erkannt werden, wodurch vorteilhafterweise insbesondere eine fälschliche Freimeldung, d.h. die fälschliche Anzeige eines Freizustands des Gleisabschnitts, vermieden wird.Based on the illustrated signals SIG S , SIG E1 , SIG E2 , therefore, the phase shift PH S, E1 between the transmit signal SIG S and the first receive signal SIG E1 , the phase shift PH S, E2 between the transmit signal SIG S and the second receive signal SIG E2 and / or the phase shift PH E1, E2 between the first receive signal SIG E1 and the second receive signal SIG E2 are determined. An evaluation of the phase shifts PH S, E1 , PH S, E2 , PH E1, E2 , for example by comparison with a respective corresponding reference phase shift, allows a review of the signal path of the respective receive signals SIG E1 or SIG E2 or both receive signals SIG E1 , SIG E2 . In accordance with the above explanations, it is possible in this case in particular to detect faults with respect to the cables or lines between the track and the respective receiver, whereby advantageously, in particular, a falsified one Free message, ie the erroneous display of a free state of the track section, is avoided.

Claims (12)

  1. Apparatus (V) for detection of the occupied or free state of a track section (G) having
    - a transmitter (S) for feeding a transmitted signal (SIGS) in the form of an AC voltage into the rails (F) of the track section (G),
    - a first receiver (E1) for receiving a first received signal (SIGE1) which is produced by transmission of the transmitted signal (SIGS) via the rails (F) of a first part of the track section (G), and
    - a second receiver (E2) for receiving a second received signal (SIGE2) which is produced by transmission of the transmitted signal (SIGS) via the rails (F) of a second part of the track section (G),
    - wherein the apparatus (V) is designed to determine the phase shift (PHE1,E2) between the first received signal (SIGE1) and the second received signal (SIGE2).
  2. Apparatus according to Claim 1,
    characterized in that
    the apparatus (V) is designed to compare the phase shift (PHS,E1, PHE1,E2) with at least one reference phase shift.
  3. Apparatus according to Claim 2,
    characterized in that
    the apparatus (V) is designed to produce a fault signal, which indicates a disturbance state, on the basis of the comparison between the phase shift (PHS,E1, PHE1,E2) and the reference phase shift.
  4. Apparatus according to Claim 3,
    characterized in that
    the apparatus (V) is designed to output the fault signal in the form of a visual and/or audible warning message.
  5. Apparatus according to one of the preceding claims,
    characterized in that
    - the transmitter (S) is designed to feed a transmitted signal (SIGS), which has been coded by means of modulation, into the rails (F) of the track section (G), and
    - the apparatus (V) is designed to compare the modulation on at least one of the received signals (SIGE1, SIGE2) with the modulation on the transmitted signal (SIGS).
  6. Apparatus according to one of the preceding claims,
    characterized in that
    the apparatus (V) is designed to transmit data signals via the rails (F) of the track section (G) to a rail vehicle which is occupying the track section (G).
  7. Method for operation of an apparatus (V) for detection of the occupied or free state of a track section (G),
    wherein
    - a transmitted signal (SIGS) in the form of an AC voltage is fed into the rails (F) of the track section (G),
    - a first received signal (SIGE1) which is produced by transmission of the transmitted signal (SIGS) via the rails (F) of a first part of the track section (G) is received, and
    - a second received signal (SIGE2) which is produced by transmission of the transmitted signal (SIGS) via the rails (F) of a second part of the track section (G) is received,
    characterized in that
    the phase shift (PHE1,E2) between the first received signal (SIGE1) and the second received signal (SIGE2) is determined.
  8. Method according to Claim 7,
    characterized in that
    the phase shift (PHS,E1, PHE1,E2) is compared with at least one reference phase shift.
  9. Method according to Claim 8,
    characterized in that
    a fault signal, which indicates a disturbance state, is produced on the basis of the comparison between the phase shift (PHS,E1, PHE1,E2) and the reference phase shift.
  10. Method according to Claim 9,
    characterized in that
    the fault signal is output in the form of a visual and/or audible warning message.
  11. Method according to one of Claims 7 to 10,
    characterized in that
    - a transmitted signal (SIGS), which has been coded by means of modulation, is fed into the rails (F) of the track section (G), and
    - the modulation on at least one of the received signals (SIGE1, SIGE2) is compared with the modulation on the transmitted signal (SIGS).
  12. Method according to one of Claims 7 to 11,
    characterized in that
    data signals are transmitted via the rails (F) of the track section (G) to a rail vehicle which is occupying the track section (G).
EP10708959.1A 2009-03-02 2010-02-23 Devices for detecting the occupied state or free state of a track section and method for operating such devices Not-in-force EP2403745B1 (en)

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DE102009010906A DE102009010906A1 (en) 2009-03-02 2009-03-02 Devices for detecting the occupancy or free state of a track section and method for operating such devices
PCT/EP2010/052249 WO2010100055A1 (en) 2009-03-02 2010-02-23 Devices for detecting the occupied state or free state of a track section and method for operating such devices

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US8613410B2 (en) 2013-12-24
EP2403745A1 (en) 2012-01-11
ES2616271T3 (en) 2017-06-12
PL2403745T3 (en) 2017-04-28
CN102341290B (en) 2015-04-29
US20110315828A1 (en) 2011-12-29
PT2403745T (en) 2017-02-06
DE102009010906A1 (en) 2010-09-16
WO2010100055A1 (en) 2010-09-10
CN102341290A (en) 2012-02-01

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