EP4105099A1 - Surveillance du signal électrique entre une unité électrique etcs côté ligne et sa balise côté voie dans un environnement de chemin de fer - Google Patents

Surveillance du signal électrique entre une unité électrique etcs côté ligne et sa balise côté voie dans un environnement de chemin de fer Download PDF

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Publication number
EP4105099A1
EP4105099A1 EP21179687.5A EP21179687A EP4105099A1 EP 4105099 A1 EP4105099 A1 EP 4105099A1 EP 21179687 A EP21179687 A EP 21179687A EP 4105099 A1 EP4105099 A1 EP 4105099A1
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EP
European Patent Office
Prior art keywords
signal
reverse
telegram
sinusoidal
copy
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.)
Withdrawn
Application number
EP21179687.5A
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German (de)
English (en)
Inventor
Emmanuel FERNANDES
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ertms Solutions
Original Assignee
Ertms Solutions
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ertms Solutions filed Critical Ertms Solutions
Priority to EP21179687.5A priority Critical patent/EP4105099A1/fr
Priority to EP22735344.8A priority patent/EP4334185A1/fr
Priority to KR1020237042579A priority patent/KR20240021792A/ko
Priority to AU2022295024A priority patent/AU2022295024A1/en
Priority to CN202280041425.XA priority patent/CN117460658A/zh
Priority to PCT/EP2022/065672 priority patent/WO2022263281A1/fr
Publication of EP4105099A1 publication Critical patent/EP4105099A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
    • B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • B61L27/50—Trackside diagnosis or maintenance, e.g. software upgrades
    • B61L27/53—Trackside diagnosis or maintenance, e.g. software upgrades for trackside elements or systems, e.g. trackside supervision of trackside control system conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • B61L27/20—Trackside control of safe travel of vehicle or train, e.g. braking curve calculation
    • B61L2027/202—Trackside control of safe travel of vehicle or train, e.g. braking curve calculation using European Train Control System [ETCS]

Definitions

  • the invention relates to the monitoring of an electrical signal in a cable between an electric unit and a balise in a railway installation, within the framework of the ETCS.
  • the European Train Control System (ETCS) in level 1 involves a cable connection between an electrical unit, called a LEU for Lineside Electrical Unit, and a balise. This connection is used to transmit from track to train the status of the lateral signals like the traffic lights. This is part of an automatic track-to-train information transmission which is received by the on-board vital computer (EVC).
  • EEC on-board vital computer
  • the electrical unit is connected to the traffic light. Each active light is detected by the electrical unit which sends to the balise thru a cable a telegram signal. This telegram is retransmitted by the balise to the train using an inductive coupling RF channel, called the interface 'A1'.
  • the cable interface between the LEU and the balise is generally called the interface 'C' and denoted by I/F C.
  • the electrical signal transmitted by the C interface comprises two additively mixed signals called signal C6 and signal C1.
  • Signal C1 is a telegram signal. More specifically, signal C1 is a Manchester-like encoded differential data signal.
  • Signal C1 comprises digital information.
  • Signal C1 typically conveys 341 or 1023 bits that repeat cyclically without interruption at a data rate of 564.48 kbits/s.
  • Document EP3067246 relates to a device and a method for monitoring the operability of a signal connection between the LEU and the balise.
  • a problem of this known method is that it requires to inject a monitoring signal in the cable.
  • An object of the present invention is to monitor and help for the maintenance of a railway installation.
  • the invention relates to a process for monitoring an electrical signal in a cable between an electric unit and a balise in a railway installation; the electrical signal comprising a forward signal and a reverse signal, the forward signal comprising a telegram signal and a sinusoidal signal, the reverse signal comprising a telegram signal and a sinusoidal signal; the process comprising the following steps:
  • the invention copies of the telegram signal (C1) and the sinusoidal signal (C6) in forward and in reverse and uses any of them, or a combination of several of them, to generate a process output, which relates to the railway installation and thus indicates a possible problem in the railway installation.
  • An alarm can be triggered if the process output is above a threshold or is different from reference data. There is thus no need of injecting any signal in the cable.
  • Using information from both the telegram signal (in forward and/or in reverse) and the sinusoidal signal (in forward and/or in reverse) is not necessary within the frame of the invention, but it is preferred since it improves the monitoring.
  • Using information from both the forward signal (telegram and/or in sinusoidal) and the reverse signal (telegram and/or in sinusoidal) is not necessary within the frame of the invention, but it is preferred since it improves the monitoring.
  • the process according to the invention is made to be run continuously. It can for example run continuously during one week.
  • the bidirectional coupler is preferably not powered.
  • the electric unit may be called a "Lineside Electronic Unit” or LEU. It is generally part of the European Train Control System (ETCS).
  • ECS European Train Control System
  • the cable may be called an "Interface C". It preferably comprises a pair of conductors (for example copper) for the transmission of a differential electrical signal.
  • the cable may have a constant characteristic impedance and behaves like a transmission line.
  • the computer unit may include logic carry out by a processor, a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or the like, or any combinations thereof, and can include discrete digital or analog circuit elements or electronics, or combinations thereof.
  • a processor a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or the like, or any combinations thereof, and can include discrete digital or analog circuit elements or electronics, or combinations thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • the process output is based on a detection of an absence of at least one of:
  • the process output preferably indicates said absence(s).
  • the process output is based on a phase difference between the telegram signal of the reverse signal and the telegram signal of the forward signal, and/or a phase difference between the sinusoidal signal of the reverse signal and the sinusoidal signal of the forward signal.
  • the phase difference of telegram signal or the sinusoidal signal provides information about the state of the cable, the electric unit and/or the balise.
  • the process output is based on at least one of:
  • the amplitude provides information about the state of the cable, the electric unit and/or the balise. For example, an amplitude in forward at least ten times higher the amplitude in reverse for the telegram and/or the sinusoidal signal typically indicates a normal state of the railway installation. An amplitude in reverse higher than a tenth of the amplitude in forward for the telegram and/or the sinusoidal signal is an indication of a possible problem in the railway installation (an open or short for example). An increase in the reverse amplitude for the telegram and/or the sinusoidal signal is an indication of a possible problem in the railway installation.
  • the process output is based on at least one of:
  • the reference value the data rate of the telegram signal of both the forward and the reverse signal is 564.48 kbits/s.
  • the reference value the frequency of the sinusoidal signal of both the forward and the reverse signal is 8.82 kHz.
  • a deviation of more than a threshold (for example 5%) with respect to the reference value an indication of a possible problem in the railway installation.
  • the process output is based on a digital content of the telegram signal of the forward signal, and/or a digital content of the telegram signal of the reverse signal.
  • the digital content means the sequence of bits (0 or 1) in the telegram signal in the forward and/or the reverse signal.
  • the process output is based on a comparison with reference data to identify a problem in the railway installation.
  • the process comprises a timestamping of the process output and a storage of the process output in a memory.
  • the process comprises a transmission of the process output from an equipment located along the railway installation, and comprising the bidirectional coupler, and the signal processing unit to a remote receiver.
  • the transmission can be done through Internet and/or can be wireless.
  • the receiver can for example be in a portable device of a security operator, in a server, and/or in a facility of a railway company.
  • the invention also relates to a system for monitoring for monitoring an electrical signal in a cable between an electric unit and a balise in a railway installation; the electrical signal comprising a forward signal and a reverse signal, the forward signal comprising a telegram signal and a sinusoidal signal, the reverse signal comprising a telegram signal and a sinusoidal signal; the system comprising:
  • the system is preferably installed at a fixed location.
  • the bidirectional coupler provides a galvanic isolation between the cable and the analyzer.
  • the bidirectional coupler is unable to inject any signal in the cable.
  • all the components of the bidirectional coupler are passive.
  • the bidirectional coupler may comprise capacitors, resistors, inductors, transformers.
  • the bidirectional coupler does not comprise any transistor or active device for example.
  • the signal processing unit comprises at least one of the following:
  • Each filter selects the desired part of the electrical signal and the subsequent slicer cleans it.
  • the invention also relates to an equipment located along a railway, comprising a system according to any embodiment, and the electric unit, the equipment being configured to be located along the railway installation
  • Figure 1 illustrates a railway installation 9 comprising a railway 93, a lineside signaling device 98, a cable 90, an electric unit 91, and a balise 92.
  • the cable 90 is located along the railway 93 and connects the electric unit 91 and the balise 92.
  • the cable 90 is intended to be used, for example, in a European Train Control System (ETCS) level 1.
  • ECS European Train Control System
  • the electric unit 91 is connected to the lineside signaling device 98, for example a traffic light.
  • the balise 92 is able to transmit information to a train computer 95 (usually called EVC for European Vital Computer) in a train 94 on the railway 93.
  • EVC European Train Control System
  • a system 1 according to the invention is preferably located in an equipment 99 located along the railway installation 9, in a same housing as the electric unit 91.
  • FIG. 2 illustrates a system 1 according to an embodiment of the invention.
  • the system 1 comprises at least one bidirectional coupler 20, each bidirectional coupler 20 being electrically and mechanically coupled one cable 90.
  • each bidirectional coupler 20 is part of a probe 200 electrically and mechanically coupled to two cables 90.
  • the bidirectional coupler 20 may be called "Passive and Isolated Probe".
  • the bidirectional coupler 20 is a pass thru device, and is intended not to disturb the transmission of the signal in the cable 90.
  • the system 1 also comprises a signal processing unit 80 comprising at least one analyzer 30, preferably connected to at least one bidirectional coupler 20 through a connection 29.
  • each analyzer 30 is connected to two probes 200. If the analyzer 30 is connected to several bidirectional couplers 20, the analysis performed by the analyzer 30 may be done using a cyclic multiplexing method.
  • the data transfer between the bidirectional coupler 20 and the analyzer 30 is preferably unidirectional: there is no data transferred from the analyzer 30 to the bidirectional coupler 20.
  • the analyzer 30 is preferably an analog and digital electronic device.
  • the signal processing unit 80 also comprises at least one processing unit 40, preferably connected to at least one analyzer 30 through a connection (USB, serial connection or LAN/Ethernet).
  • the processing unit 40 preferably comprises a computing unit 41 and a memory 42.
  • the system 1 may also comprise a transmission device 50, like a modem, connecting wirelessly the processing unit 40 to the Internet 60.
  • a transmission device 50 like a modem, connecting wirelessly the processing unit 40 to the Internet 60.
  • FIG. 3 is a flowchart of a process 100 according to an embodiment of the invention.
  • An electrical signal 10 is present in the cable 90 between the electric unit 91 and the balise 92.
  • the electrical signal 10 comprises a forward signal 11 and a reverse signal 12, the forward signal 11 comprising a telegram signal 111 and a sinusoidal signal 116, the reverse signal 12 comprising a telegram signal 121 and a sinusoidal signal 126.
  • the bidirectional coupler 20 connected to the cable 90 extracts a copy 21 of the forward signal 11 and a copy 22 of the reverse signal 12 and transfers them, as a bidirectional coupler output 25, to the analyzer 30.
  • FIG. 4 illustrates an exemplary embodiment of the bidirectional coupler 20 coupled to a cable 90 comprising two conductors 90a, 90b.
  • the signal 10 flows in the two conductors 90a, 90b between the electrical unit 91 and the balise 92.
  • the exemplary embodiment of the bidirectional coupler 20 comprises four transformers and two resistors:
  • N may be equal to 10 for example.
  • Tr3 and Tr4 provide galvanic isolation between the cable 90 and the analyzer 30.
  • the bidirectional coupler 20 only comprises passive electric components.
  • the bidirectional coupler 20 is not powered, except through the cable 90.
  • connection 29 between the bidirectional coupler 20 and the analyzer 30 preferably comprises four conductors: two conductors 29a, 29b for the forward signal 21, and two conductors 29c, 29d for the reverse signal 22.
  • the bidirectional coupler 20 sends to the analyzer 30 the forward signal 21 C FWD (t) and the reverse signal 22 C REV (t), which are voltages as a function of the time.
  • bidirectional coupler 20 Many other embodiments of the bidirectional coupler 20 are possible within the frame of the invention.
  • the signal processing unit 80 receives the copy 21 of the forward signal 11 and the copy 22 of the reverse signal 12 and the analyzer 30 analyzes them to determine a measurement output 35.
  • the analysis by the analyzer 30 preferably comprises the determination of at least one of:
  • the measurement output 35 is based on one or several of these signals 111, 116, 121, 126. Preferably, one or several of these signals 111, 116, 121, 126 may be included or may form the measurement output 35.
  • Figure 5 shows a possible architecture of the analyzer 30. If the analyzer 30 is connected to several bidirectional couplers 20, the blocks (except blocks 230, 240) can be replicated.
  • the analysis may comprise data analog filtering, signal reconditioning, analog envelope detection, digital decoding and data recording.
  • the low-pass filter 211 extracts the sinusoidal signal 116 of the forward signal 11 which is expected to be a pure sine wave at 8.82 kHz. The same holds for the reverse signal 126.
  • the low-pass filters 211, 221 can be of any type. Their purpose is to reject the C1 signal which starts at 564.48 kHz.
  • the high-pass filter 212 removes the C6 and just extracts the telegram signal 111 of the forward signal 11. The same holds for the reverse signal 121.
  • the C6 rejection is more than 60 dB.
  • the analyzer 30 may comprise four envelop detectors 213, 216, 223, 226.
  • the envelop detectors 213, 223 are AC signal envelop detector configured to determine the amplitude of the C6 extracted component, i.e., the amplitude
  • the envelop detectors 216, 226 are AC signal envelop detector configured to determine the amplitude of the C1 extracted component, i.e., the amplitude
  • the envelop detectors 213, 216, 223, 226 are preferably linear with respect to the input signal amplitude.
  • the analyzer 30 may comprise four signal slicers 214, 215, 224, 225. They are analog comparator-based signal reshaper. They are configured to convert an analog AC signal to a square signal at TTL/CMOS levels with rising/falling edges corresponding to the negative-to-positive and positive-to-negative transitions of the signal respectively.
  • the signal slicers 214, 215, 224, 225 make possible to remove a possible DC offset and/or possible deformation of the signal.
  • the output of the signal slicers 215, 225 (i.e. for C1) is Differential Bi-Phase Level (DBPL) coding.
  • DBPL Differential Bi-Phase Level
  • the analyzer 30 may comprise four analog-to-digital converters 217, 218, 227, 228, which convert the analog signal between 0 and Vmax provided by the envelop detectors into a digital quantized representation to be processed by the FPGA 230 and the CPU 240.
  • the four analog-to-digital converters 217, 218, 227, 228 have preferably a vertical resolution of at least 12 bits.
  • the analyzer 30 may comprise an FPGA 230.
  • the FPGA 230 may determine the frequency of the sinusoidal signal 116 of the forward signal 11 by measuring the frequency of the signal provided by the signal slicer 214.
  • the FPGA 230 may determine the frequency of the sinusoidal signal 126 of the reverse signal 12 by measuring the frequency of the signal provided by the signal slicer 224.
  • the FPGA 230 may determine, from the output of the signal slicers 214, 224 a phase difference ⁇ 6 between the sinusoidal signal 126 of the reverse signal 12 and the sinusoidal signal 116 of the forward signal 11.
  • the FPGA 230 may determine, from the output of the signal slicers 215, 225 a phase difference ⁇ 1 between the telegram signal 121 of the reverse signal 12 and the telegram signal 111 of the forward signal 11.
  • the FPGA 230 may decode the output of the signal slicer 215 to extract the digital content of the telegram signal 111 of the forward signal 11.
  • the FPGA 230 may decode the output of the signal slicer 225 to extract the digital content of the telegram signal 121 of the reverse signal 11.
  • the FPGA 230 may determine, from the output of the signal slicers 215, the data rate of bits of the telegram signal 111 of the forward signal 11.
  • the FPGA 230 may determine, from the output of the signal slicers 225, the data rate of bits of the telegram signal 121 of the reverse signal 12.
  • the FPGA 230 may determine the analog level of any of the four signals 111, 116, 121, 126 after analog-to-digital conversion.
  • the analyzer 30 may comprise a central processing unit (CPU) 240, which collects the data outputted by the FPGA 230 and prepare them for recording and transmission.
  • CPU central processing unit
  • the analyzer 30 sends, preferably continuously, the measurement output 35 (both analog and digital) to the processing unit 40.
  • a process output 55 may be determined by the processing unit 40 or may be formed by at least part of the measurement output 35.
  • the processing unit 40 may store in its memory 42 the measurement output 35 and/or process it further to determine the process output 55.
  • the processing unit 40 may provide the process output 55 to the transmission device 50 ( figure 2 ) for a transmission outside the equipment 99 (figure 22), to a remote receiver, for example to a server including a database.
  • the analyzer 30 and/or the processing unit 40 may also assess the actual presence, and thus the absence of at least one of the four signals 111, 116, 121, 126.
  • REV voltage When circuit is matched, REV voltage is very small and almost zero (since N is considered as large usually greater than 10). In the terminology of bi-directional coupler, this corresponds to a circuit where all energy is transmitted to the load with no reflection (REV voltage is zero). When the circuit is open, the REV voltage is high and almost equal in magnitude, but reversed in phase (since N is usually larger than 10). When the circuit is shorted, the REV voltage is high and equal in magnitude and in phase with the FWD voltage. In other word, high REV voltages correspond to energy reflection and to open/short circuit conditions. Low and almost zero REV voltages correspond to well-matched circuits.
  • the processing unit 40 may compare measured data (preferably the measurement output 35 or data extracted from it) with reference data 45 to detect deviation with expected nominal range or value and thus identify a problem in the railway installation 9.
  • the reference data 45 comprise an expected value or an expected sequence, and for example if the comparison indicates a difference above a threshold, the process output 55 indicates which measured data may be problematic, preferably with the measured data and its expected value.
  • the measured data is a sequence of bits provided by the digital content of the telegram signal 111 of the forward signal 11, it may be compared with an expected sequence (the reference data), and the process output 55 may indicate that the sequence is as expected or may indicate the measured sequence and the expected sequence.
  • the processing unit 40 may also determine a drift in at least one of the measured data of the measurement output 35.
  • the processing unit 40 may analyze the digital content of the telegram signal 111 of the forward signal 11 and/or the digital content of the telegram signal 121 of the reverse signal 11 to detect, for example, the following problems:
  • the process output 55 relates to the railway installation 99.
  • the process output 55 may comprise a timestamp corresponding to the time when it was determined.
  • the process output 55 may be a message, displayed on the equipment 99 and/or send by the transmission device 50 and/or stored in the memory 42. It can be an alarm message and/or a warning message for example. It may be sent only if the comparison with the reference data 45 indicates a deviation with respect to a nominal range.
  • the process output 55 contain information, for example explicit information, about at least one of the following:
  • the invention relates to the monitoring an electrical signal 10 in a cable 90 between an electric unit 91 and a balise 92 in a railway installation 9.
  • the forward signal 11 and the reverse signal 12 of the electrical signal 10 are copied, and their copies 21, 22 are analyzed to determine a process output 55 based on the telegram signal 111 of the forward signal 11, and/or the sinusoidal signal 116 of the forward signal 11, and/or, the telegram signal 121 of the reverse signal 12, and/or the sinusoidal signal 126 of the reverse signal 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
EP21179687.5A 2021-06-16 2021-06-16 Surveillance du signal électrique entre une unité électrique etcs côté ligne et sa balise côté voie dans un environnement de chemin de fer Withdrawn EP4105099A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP21179687.5A EP4105099A1 (fr) 2021-06-16 2021-06-16 Surveillance du signal électrique entre une unité électrique etcs côté ligne et sa balise côté voie dans un environnement de chemin de fer
EP22735344.8A EP4334185A1 (fr) 2021-06-16 2022-06-09 Surveillance du signal électrique entre une unité électrique côté ligne etcs et sa balise côté voie dans un environnement ferroviaire
KR1020237042579A KR20240021792A (ko) 2021-06-16 2022-06-09 철도 환경에서 etcs 선로변 전기 유닛과 궤도변 발리스 사이의 전기 신호의 모니터링
AU2022295024A AU2022295024A1 (en) 2021-06-16 2022-06-09 Monitoring the electrical signal between an etcs lineside electrical unit and its trackside balise in a railway environment
CN202280041425.XA CN117460658A (zh) 2021-06-16 2022-06-09 监测铁路环境中etcs线路侧电气单元与其轨道侧应答器之间的电信号
PCT/EP2022/065672 WO2022263281A1 (fr) 2021-06-16 2022-06-09 Surveillance du signal électrique entre une unité électrique côté ligne etcs et sa balise côté voie dans un environnement ferroviaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21179687.5A EP4105099A1 (fr) 2021-06-16 2021-06-16 Surveillance du signal électrique entre une unité électrique etcs côté ligne et sa balise côté voie dans un environnement de chemin de fer

Publications (1)

Publication Number Publication Date
EP4105099A1 true EP4105099A1 (fr) 2022-12-21

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP21179687.5A Withdrawn EP4105099A1 (fr) 2021-06-16 2021-06-16 Surveillance du signal électrique entre une unité électrique etcs côté ligne et sa balise côté voie dans un environnement de chemin de fer
EP22735344.8A Pending EP4334185A1 (fr) 2021-06-16 2022-06-09 Surveillance du signal électrique entre une unité électrique côté ligne etcs et sa balise côté voie dans un environnement ferroviaire

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP22735344.8A Pending EP4334185A1 (fr) 2021-06-16 2022-06-09 Surveillance du signal électrique entre une unité électrique côté ligne etcs et sa balise côté voie dans un environnement ferroviaire

Country Status (5)

Country Link
EP (2) EP4105099A1 (fr)
KR (1) KR20240021792A (fr)
CN (1) CN117460658A (fr)
AU (1) AU2022295024A1 (fr)
WO (1) WO2022263281A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708518A1 (de) * 1997-03-03 1998-10-01 Signal Concept Gmbh Verfahren und Vorrichtung zum Auffinden einer Defektstelle in einer Leiterschleife
EP2186706B1 (fr) * 2008-11-12 2012-04-18 ALSTOM Transport SA Dispositif de détection d'anomalie pour une installation de supervision d'un véhicule ferroviaire, installation et procédé associés
EP3067246A1 (fr) 2015-03-09 2016-09-14 Bombardier Transportation GmbH Dispositif et procédé pour surveiller la fonctionnalité d'une connexion de signal
CN108132433B (zh) * 2017-11-13 2020-02-14 北京全路通信信号研究设计院集团有限公司 一种leu监测板信号提取电路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708518A1 (de) * 1997-03-03 1998-10-01 Signal Concept Gmbh Verfahren und Vorrichtung zum Auffinden einer Defektstelle in einer Leiterschleife
EP2186706B1 (fr) * 2008-11-12 2012-04-18 ALSTOM Transport SA Dispositif de détection d'anomalie pour une installation de supervision d'un véhicule ferroviaire, installation et procédé associés
EP3067246A1 (fr) 2015-03-09 2016-09-14 Bombardier Transportation GmbH Dispositif et procédé pour surveiller la fonctionnalité d'une connexion de signal
CN108132433B (zh) * 2017-11-13 2020-02-14 北京全路通信信号研究设计院集团有限公司 一种leu监测板信号提取电路

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EP4334185A1 (fr) 2024-03-13
CN117460658A (zh) 2024-01-26
AU2022295024A1 (en) 2024-01-04
WO2022263281A1 (fr) 2022-12-22
KR20240021792A (ko) 2024-02-19

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