EP2810848A2 - Procédé et dispositif de contrôle d'aimants de voie de sécurité inductive pour le trafic guidé sur voies - Google Patents

Procédé et dispositif de contrôle d'aimants de voie de sécurité inductive pour le trafic guidé sur voies Download PDF

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Publication number
EP2810848A2
EP2810848A2 EP14157745.2A EP14157745A EP2810848A2 EP 2810848 A2 EP2810848 A2 EP 2810848A2 EP 14157745 A EP14157745 A EP 14157745A EP 2810848 A2 EP2810848 A2 EP 2810848A2
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EP
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Prior art keywords
track
frequency
signal
frequencies
magnets
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EP14157745.2A
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German (de)
English (en)
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EP2810848B1 (fr
EP2810848A3 (fr
Inventor
Johannes Sütterlin
Jens Hopbach
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Deutsche Bahn AG
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DB Netz AG
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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
    • B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
    • 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
    • B61L3/121—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 using magnetic induction
    • 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
    • B61L3/121—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 using magnetic induction
    • B61L2003/122—German standard for inductive train protection, called "Induktive Zugsicherung"[INDUSI]

Definitions

  • the invention relates to a device and method for checking track magnets of the inductive fuse in track-bound traffic.
  • PZB point-shaped train control
  • track magnets are attached to the track at safety-relevant points, which indicate the condition of main and / or pre-signals or other devices to be secured, such as, for example, Transmitting railway crossings inductively to the rail vehicle.
  • DB AG essentially three different track magnet types are used, which are classified based on the rated frequency of the transmitted electromagnetic signals to 500 Hz, 1000 Hz and 2000 Hz track magnets.
  • the 1000 Hz track magnets are located at the site of pre-signals, the 2000 Hz track magnets at the location of main signals, the 500 Hz track magnets 150 to 250 meters ahead of the main signals. Depending on the operating conditions, the track magnets are switched on or off. Rail vehicles equipped with a PZB receiver will receive their signals as they travel over switched-on track magnets and evaluate their signals. As a result, the rail vehicle can be influenced by the PZB for safety reasons, right up to automatic emergency braking when the signal is overrun.
  • the DE 703 573 and DE 703 621 each describe test equipment for measuring resonance frequency and damping of the track magnets.
  • the DE 545 101 describes a test device that simulates the vehicle-side component of the inductive train protection.
  • Track magnetometers available in the state of the art have a frequency generator for generating a test frequency which is connected to a controllable constant current source which is galvanically connected to the track magnet.
  • the generator frequency By varying the generator frequency, the resonant frequency of the track magnet is determined by determining the phase difference between current and voltage at the track magnet. The phase difference is determined using a phase meter. At a phase difference of zero, the resonance frequency is reached. To determine the quality, the frequencies are determined successively in which the phase difference between current and voltage at the track magnet is +/- 45 °.
  • the frequency generator varies the applied to the controllable constant current source test frequency. The frequencies thus determined represent the upper and lower limit frequency of the track magnet.
  • the quality of the track magnet then results as a quotient of resonance frequency and the difference of the cutoff frequencies.
  • a disadvantage of this method is, inter alia, that in addition to current and voltage measuring devices, an additional phase meter is required, which has to measure three different phase angles. In addition, with this device, it is not possible to check the solenoids of recent speed testers, as they can not be switched by a single frequency.
  • the object of the present invention is to provide a method and a device with which it is possible to test track magnets as efficiently and accurately as possible, wherein the new solenoids should also be able to be switched by speed check devices.
  • the central idea of the invention for the device described in claim 1 is the use of multiple frequency generators in a track magnet tester.
  • the frequency generators must be able to be controlled both separately and synchronously.
  • the device is also able to continuously tune the test frequency, the phase position between the signals of two different frequency generators remains stable when they are driven synchronously.
  • the tuning range from 400 Hz to 2400 Hz contains the relevant track magnetic frequencies of 500 Hz, 1000 Hz and 2000 Hz.
  • the test frequency of a frequency generator is switched to a constant current source.
  • the constant current source is thus a modulated with the test frequency output current, which can be applied via a connecting device, for example via cable to the resonant circuit of the track-side track magnet to be tested.
  • Measuring instruments can be used to measure the voltage and current and their relative phase position on the track magnet. Due to the tunability of the test frequency can be determined with the device, the phase shift as a function of frequency. The measurement results can not only be displayed on a display, but also partially stored and analyzed based on the track magnet.
  • phase position can advantageously be selected differently between the signals of a plurality of frequency generators, elegant possibilities for determining the resonant frequency and the quality of the resonant circuit in the track magnet arise with the same measuring method.
  • the frequency generators are adjustable so that the phase difference between the reference signal of one frequency generator and that of the one further frequency generator + 45 ° and between the reference signal and that of the second further frequency generator is -45 °.
  • the frequency generators are adjustable so that the phase difference between the reference signal of one frequency generator and that of the one further frequency generator + 45 ° and between the reference signal and that of the second further frequency generator is -45 °.
  • the reference signal with the phase position defined as 0 ° on the track magnet is fed, can be tapped at the track magnet signal of the excited parallel resonant circuit in each case with the reference signal and the signals with the phase position + 45 ° and -45 °.
  • phase difference between current and voltage at the excited parallel resonant circuit in the track magnet is zero, or minimal, when the resonant frequency is reached.
  • the phase difference is + 45 ° or -45 °.
  • An advantageous possibility of determining a frequency with a minimal phase difference between two sinusoidal signals is realized by the use of two comparators whose outputs are combined in an exclusive OR gate. Each signal is converted in a separate comparator into a square wave signal. By combining in an exclusive-OR gate supplies the circuit at the output of a square wave signal whose width or pulse length is dependent on the phase difference of the signals.
  • DDS chips Direct Digital Synthesis
  • Such proven standard components are inexpensive, accurate and readily available. They can be controlled with the aid of microcontrollers and thus synchronized with each other with little circuit complexity and make it possible to realize constant phase differences between DDS chips of the same frequency.
  • the frequency generators are followed by steep edge filters.
  • the filters filter out higher frequencies. This is necessary in order to obtain no appreciable deviations from the set phase positions.
  • the system clock of the DDS chips is also filtered out.
  • the filter removes the DC component of the signal since the test signal after the DDS chip is further amplified for further processing.
  • the track magnet tester advantageously has at least one own excitation coil for emitting an electromagnetic signal which can be driven by the constant current source.
  • the track magnet tester advantageously has at least one own excitation coil for emitting an electromagnetic signal which can be driven by the constant current source.
  • the signals from at least two frequency generators can be interconnected in front of the constant current source so that the sum signal can be switched to the exciter coil.
  • a current signal after the constant current source which represents a mixture of two signals with two identical or different frequencies.
  • the switching magnets of the new speed checking devices can also be switched on or off. While it is possible in conventional GPE older design to switch the solenoids with a single frequency of 1000 Hz, recent GPE solenoids have filter assemblies that filter out disturbing influences of vehicle components for safety reasons. Such GPE solenoids require that at least two of the three track magnet frequencies be present simultaneously to switch a GPE solenoid.
  • a DDS chip generates a 1000 Hz signal and another a 2000 Hz signal and both signals are applied as a sum signal to the constant current source, the signal emitted by the excitation coil, the prerequisite for a switching signal for the new GPE switching magnet fulfill.
  • a programmable, integrated electronic circuit controls and monitors the device and analyzes and at least partially stores the measured values.
  • microprocessors are also suitable for this purpose.
  • a microprocessor controls the frequency generators and thus adjusts the frequencies to be generated and their phase angles. Furthermore, it receives the measuring signals of the measuring instruments and evaluates them automated to regulate the frequency generators, to switch the required depending on the measurement task components and to obtain the test results accordingly.
  • other programmable circuits can be used without departing from the invention, eg, FPGA, external CPU, etc.
  • a method for checking the resonant frequency and the quality of track magnets of the inductive fuse is described in claim 10.
  • the method uses a test apparatus having three frequency generators as set forth in the device claims. Due to a fixed phase difference between test and reference signal can be using the method both the resonant frequency and the quality of the parallel resonant circuit to be examined track magnet for track-bound traffic with the same measurement method efficiently determine.
  • the order of the determination of resonant frequency and the cutoff frequencies is irrelevant in principle. In the description of the method, the determination of the resonant frequency will be discussed here for the sake of clarity only.
  • the resonant frequency of a parallel resonant circuit can be determined by measuring the phase shift between current and voltage at the resonant circuit.
  • the resonant frequency can therefore be determined by examining the phase difference between an alternating current introduced into the resonant circuit and an ac voltage generated with the same frequency and phase as a function of the frequency.
  • the frequency at which this phase difference becomes zero or minimum is the sought resonance frequency.
  • a continuous signal with a defined frequency is generated by a frequency generator.
  • a part of the signal is used as a reference signal in the form of an AC voltage.
  • Another part of the signal is fed as a test signal in a constant current source whose output signal is fed as an alternating current in the resonant circuit to be examined.
  • the sinusoidal current signal picked up at the resonant circuit is now generally phase-shifted from the reference signal. This phase shift changes with the frequency.
  • the frequency is determined at which a minimum phase difference between test and reference signal occurs.
  • the device automatically analyzes the measured values and stores the resonance frequency of the associated track magnet.
  • the resonance frequency f R has been determined, the upper and lower limit frequency f O , f U must still be determined.
  • phase-shifted reference signals of the same frequency are generated and the frequency again tuned continuously. Since the phase position to be taken between the signals has already been suitably chosen, as in the determination of the resonant frequency, it is only necessary to investigate at which frequency the phase difference becomes zero or minimal. As soon as the phase difference between reference and test signal becomes minimal, the associated cutoff frequency is found and stored accordingly. After the frequencies to be determined have been measured and stored, the quality of the resonant circuit is calculated and stored. Furthermore, the data is analyzed as to whether they are compatible with the tolerance values stored in the device in a data memory. If so, the track magnet is considered functional. Since the track magnets to be examined on the section are listed in a kind of work list, the results of the test can be directly assigned to the track magnets on the list, which facilitates the evaluation of the data and the planning and execution of maintenance or repair work.
  • a very efficient method according to claim 11 can be used to determine the frequencies with minimum phase difference.
  • test and reference signal are each applied to an input of its own comparator.
  • the sinusoidal signals are converted into rectangular signals.
  • Both square-wave signals are combined in an exclusive OR gate and thereby logically analyzed.
  • the width of the square-wave signal thus also changes in a frequency-dependent manner according to the exclusive-OR element.
  • the resonant frequency of the associated track magnet is the frequency that has a rectangular signal with minimum width when fed by in-phase test and reference signals after the exclusive OR gate.
  • the cut-off frequencies are determined by comparison of the fed into the track magnet test signal with corresponding + 45 ° or -45 ° phase-shifted reference signals by test and reference signals are fed as before each on their own comparators. Both square wave signals are combined in an exclusive OR gate and thereby logically analyzed as described above. Finally, at the output of the exclusive-OR gate there is a square-wave signal whose width depends on the phase difference of the square-wave signals.
  • the upper and lower limit frequencies of the associated track magnet are the frequencies that have a rectangular signal with minimum width when fed by appropriately phase-shifted test and reference signals after the exclusive OR gate.
  • the presence of at least two frequency generators can be used to check according to claim 12, whether a speed checking device (GPE) can be switched on or off correctly or not.
  • GPE speed checking device
  • newer GPE solenoids have filter assemblies which, for safety reasons, filter out interfering influences of vehicle components.
  • Such GPE solenoids require that at least two of the three track magnet frequencies are present simultaneously to switch a GPE shift solenoid. It is thus particularly advantageous if different frequencies (500 Hz, 1000 Hz or 2000 Hz) are generated by at least two frequency generators and these two signals are applied to the constant current source as a sum signal.
  • a signal is emitted by the excitation coil, which contains the corresponding signal components, so that the requirements for a switching signal for the new GPE switching magnets are met.
  • the maintenance engineer then monitors whether the GPE status displays indicate the desired switching status and thus whether the GPE was switched on or off as desired.
  • a simple inductive quick test of the track magnets is additionally possible according to claim 13, if the device still has its own test resonant circuits with resonance frequencies 500 Hz, 1000 Hz and 2000 Hz, which can interact inductively with the track resonant circuit.
  • the device When the device is brought close to the track resonant circuit, it can be determined from the voltage measured at the exciter coil whether or not the signal radiated by the test circuit meets the resonant frequency of the track magnet. Since the voltage values at the exciter coil differ even with non-active track magnets from those with active track magnets, a complete quick check of the track magnet can be done. For each of the three different track magnet types, voltage threshold values Us are respectively defined for this, which are compared with the voltages measured at the exciter coil.
  • the frequency of the track magnet corresponds to the frequency of the test resonant circuit, which has caused a threshold value overshoot. If the voltage at the excitation coil remains below the threshold value Us at all three frequencies, the track magnet is considered inactive.
  • Fig. 1 shows a block diagram of an exemplary tester with three frequency generators, which are realized by means of three DDS chips.
  • the frequency generators are each followed by steep-slope low-pass filters and amplifiers.
  • the middle frequency generator generates a signal whose phase angle is defined as 0 ° and which is fed into a constant current source (KSQ). All three signals can be used as reference signals via a changeover switch. To do this, measure the falling voltage and compare the phase angles between the test current fed to the track magnet (GM) and the voltage of the reference signal using comparators and an exclusive-OR gate.
  • a microcontroller controls the process and evaluates the measurement results.
  • the microcontroller can be operated via a keyboard.
  • a controller-controlled display shows the user the required information.
  • the voltage at the track magnet is tapped via the RMS / DC converter and read into the microcontroller. This can also measure the parallel resistance of the track magnet and regulate the constant current source in a given range.
  • the device also includes an excitation coil, which is also controlled by the KSQ.
  • the device also has three series resonant circuits which can be connected by means of relays for inductive excitation of the track magnets at frequencies 500 Hz, 1000 Hz and 2000 Hz.
  • the digital potentiometer in front of the KSQ is used to adjust the signal level.
  • the microcontroller also has two EEPROM memory modules for storing the measured data as well as for storing the reference or limit values for analyzing the measurement results.
  • the measured data are saved with the current time.
  • FIG. 2 shows an exemplary block diagram of the control loop for determining the target pulse length, ie the width of the square wave signal after the exclusive OR gate.
  • the microcontroller uses the DDS chips to generate the measurement and test signals at a specific frequency.
  • the appropriate voltage values for controlling the KSQ are set via the digital potentiometer and returned to the ⁇ C as controller by means of two RMS / DC converters at the measuring points RP 'and RP, thus monitoring compliance with the permissible tolerance ranges.
  • the pulse length is measured and transmitted to the ⁇ C, which then continues to drive the DDS chips.
  • control clock is given not only to the clock inputs of the DDS chips, but also to a D flip-flop, along with the control line from the ⁇ C. This ensures that the corresponding inputs of the DDS chips are always in sync with the clock.
  • the DDS chips produce as output a sinusoidal signal with a resolution of 10 bits and an amplitude of 1.2 V S. Since the signal is amplified for further processing and still contains a DC component, it must be filtered. This is done by the filters at the outputs of the DDS chips.
  • the cutoff frequency of the filters is around 1.2 MHz to keep the phase shift of the signal as low as possible ( ⁇ 1 °). This ensures that there are no significant deviations from the required phase shifts.
  • Another aspect for the use of a steep-edged filter is the fact that the DDS chips are clocked at 10 MHz and the system clock has to be removed from the useful signal.
  • the DC component is also eliminated in the filters.
  • a voltage of 0.6 V S is established at the output of the filter.
  • all three signals are amplified by a factor of 20 by a non-inverting operational amplifier.
  • the output of the amplifier is fed to a digital potentiometer, which is controlled via an SPI bus.
  • the signal is applied to the controllable constant current source. From there, the signal can be switched to the track magnet.
  • the measuring voltage is approx. 70 V S. Since the measuring voltage can not be applied directly to an AD converter of the microcontroller, it must be rectified and adjusted in terms of level.
  • two DDS chips can be interconnected via a digital potentiometer, so that their signals can also be mixed with different frequencies to form a sum signal. Subsequently, the sum signal can be switched via the voltage-controlled constant current source to the exciter coil.
  • the device To inductively measure track magnets, the device includes a coil with ferrite core and three taps. In conjunction with corresponding switching relays and capacitors, series resonant circuits with different resonance frequencies (500 Hz, 1000 Hz, 2000 Hz) are formed.
  • the resonant frequency measurement method relies on a DDS chip to pass the signal with a 0 ° phase shift to the controllable constant current source via an electronic potentiometer. At this the track magnet is connected.
  • the track magnet consists of a parallel resonant circuit, which has its highest resistance at resonance. If the frequency is now varied, the phase shift between voltage and current at the track magnet also changes. When the phase shift becomes zero, the resonance frequency is found. The frequencies at which there is a phase shift of -45 ° or + 45 ° between current and voltage, represent the 3 dB cutoff frequencies. To determine the quality of the resonant circuit in the track magnet, all three DDS chips are now programmed with the same frequency but different phase angles. If the phase angle of the middle DDS chip in Fig. 1 defined as 0 °, the phase angles + 45 ° and -45 °, respectively, result for the other DDS chips.
  • the track magnet is subjected to a frequency sweep between 400 Hz and 2400 Hz, which is controlled by the microcontroller. It makes sense in the first measuring step to determine a suitable starting frequency, which is dependent on the rated frequency (500 Hz, 1000 Hz or 2000 Hz) of the track magnet to be examined.
  • the microcontroller generates a frequency of 2300 Hz to determine the nominal frequency with the aid of the DDS chips.
  • the digital potentiometer is set to a constant value and held there.
  • the microcontroller then reads in and evaluates the voltage values from the RMS / DC converter. Depending on the values, it is detected whether a track magnet is connected at all or whether the line is short-circuited.
  • the measurement is aborted and all outputs are set to zero. If a track magnet is connected, the frequency is reduced in 8 Hz increments until the connected parallel resonant circuit of the track magnet has a certain resistance value. This is achieved as soon as the RMS / DC converter detects a voltage of at least 30 V at the measuring point RP. The frequency found is used as starting frequency for the further process. Depending on the found starting frequency, a corresponding parameter set for the measuring algorithm is loaded.
  • the step size of the frequency jumps depends on the nominal frequency and the content of the parameter set.
  • the upper limit frequency is determined, then the resonance frequency and then the lower limit frequency. From this, the quality of the track magnet is calculated.
  • the + 45 ° signal is switched to one comparator and the signal to the other, which is galvanically brought to the track magnet by the 0 ° -DDS chip signal via the constant current source and tapped there.
  • the outputs of the two comparators are then combined in an exclusive OR gate and fed to the microcontroller. This varies the frequency, the square wave signal, ie its pulse length, becomes increasingly narrow at the output of the exclusive OR gate, the closer one gets to the upper limit frequency until a minimum occurs. When the minimum is reached, the first cutoff frequency is found.
  • the minimum is usually not nearly zero, but is a few microseconds. This is due to the signal propagation delays through the digital potentiometer and the KSQ which always readjust the measuring signal at about 45-50 V rms at the track magnets. This results in unavoidable signal delays, which must be taken into account in the pulse length determination. For this reason, a self-calibration is performed every time the device is switched on. In this case, not the track magnet is measured, but an internal ohmic resistance. The pulse length, which is determined in this measurement, is stored as calibration pulse length in the device. This also compensates for temperature influences and component aging. Due to the principle, there is the disadvantage that two identical target values can be measured when determining the pulse length.
  • the frequency is changed in a predetermined manner, starting from the starting frequency only in one direction.
  • the override of the current source is constantly monitored by the microcontroller via the RMS / DC converter at the measuring point RP 'and brought to a level of max. Limited to 51.4 V eff .
  • the power source is controlled so that the track magnet is at a voltage between 45.5 V eff and 48.5 V eff .
  • the 0 ° signal is then switched to both comparators. Then the frequency is varied again until the square wave reaches its minimum.
  • Another object of the exciter coil is to inject a sufficiently strong signal into a solenoid to turn on or off the attached SPE (GPE).
  • GPE SPE
  • different frequencies are generated by two DDS chips, namely 1000 Hz and 2000 Hz.
  • the two frequencies are applied to a digital potentiometer where they are mixed to form a sum signal.
  • the sum signal can be switched via the voltage-controlled constant current source to the exciter coil.
  • a frequency of 1000 Hz is generated at the beginning of the measurement by two DDS chips. These are up-regulated linearly by the digital potentiometer and set to a maximum value which is determined during calibration in the factory. Only after reaching this value is a DDS chip switched to 2000 Hz and both frequencies combined.
  • the sum signal When the sum signal is applied to the excitation coil, it will be applied to the excitation coil for a total of 3 seconds to ensure safe turn-on / turn-off.
  • the maintenance engineer now uses the status displays of the GPE to check whether the gear changes have actually taken place as specified or not.
  • the inductive quick test is explained by way of example. It serves to determine the track magnet type.
  • the track magnet tester is placed on the track magnet and the measurement of the nominal frequency is determined via an inductive coupling. In addition, it is determined whether the track magnet is in an effective or inoperative state.
  • the track magnet tester has its own test resonant circuits with resonant frequencies 500 Hz, 1000 Hz and 2000 Hz, which can interact inductively with the track resonant circuit.
  • Thresholds Us are defined for this purpose. If the voltage measured at the excitation coil exceeds the threshold Us at one frequency while remaining below the respective sword Us at the two other frequencies, the frequency at which the threshold Us was exceeded is rated as the nominal frequency of the track magnet.
  • the following voltages on the exciter coil are measured on a track magnet as a function of the exciter frequency set on the tester: f [Hz] Excitation coil voltage 500 5.1V 1000 6.4V 2000 18.3 v
  • the track magnet is considered to be inactive.
  • a 500 Hz track magnet has an excitation coil voltage of less than 8 V at an excitation coil frequency of 500 Hz and 1000 Hz and an excitation coil voltage of less than 13 V at an excitation coil frequency of 2000 Hz, it is considered inactive.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
EP14157745.2A 2013-06-06 2014-03-05 Procédé et dispositif de contrôle d'aimants de voie de sécurité inductive pour le trafic guidé sur voies Active EP2810848B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013210567.3A DE102013210567B3 (de) 2013-06-06 2013-06-06 Verfahren und Vorrichtung zum Überprüfen von Gleismagneten der induktiven Sicherung bei spurgebundenem Verkehr

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EP3424796A1 (fr) 2017-07-06 2019-01-09 ALSTOM Transport Technologies Dispositif pour déterminer au moins une caractéristique d'un circuit résonant ferroviaire, et système de protection de train comprenant un tel dispositif

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CN109625038B (zh) * 2018-12-27 2020-12-18 合肥工大高科信息科技股份有限公司 一种轨道电路状态鉴别系统和方法
CN112946362B (zh) * 2021-03-31 2022-06-21 歌尔股份有限公司 振动电机的谐振频率检测方法、装置、终端设备及存储介质

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DE545101C (de) 1930-12-07 1932-02-27 Ver Eisenbahn Signalwerke G M Einrichtung zum Pruefen von Streckenmagneten der induktiven Zugbeeinflussung
DE703573C (de) 1939-08-16 1941-03-12 Ver Eisenbahn Signalwerke G M Pruefgeraet fuer Gleismagnete
DE703621C (de) 1939-08-16 1941-03-13 Ver Eisenbahn Signalwerke G M einflussung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105425106A (zh) * 2015-11-11 2016-03-23 国网山西省电力公司晋城供电公司 一种电缆故障检测试验系统及其工作方法
CN105425106B (zh) * 2015-11-11 2018-02-09 国网山西省电力公司晋城供电公司 一种电缆故障检测试验系统及其工作方法
EP3424796A1 (fr) 2017-07-06 2019-01-09 ALSTOM Transport Technologies Dispositif pour déterminer au moins une caractéristique d'un circuit résonant ferroviaire, et système de protection de train comprenant un tel dispositif

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EP2810848B1 (fr) 2018-06-13
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