EP1541440A1 - Method of phase modulation of an electrical and electromagnetic resonance circuit, in particular for axle counters - Google Patents
Method of phase modulation of an electrical and electromagnetic resonance circuit, in particular for axle counters Download PDFInfo
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- EP1541440A1 EP1541440A1 EP03360140A EP03360140A EP1541440A1 EP 1541440 A1 EP1541440 A1 EP 1541440A1 EP 03360140 A EP03360140 A EP 03360140A EP 03360140 A EP03360140 A EP 03360140A EP 1541440 A1 EP1541440 A1 EP 1541440A1
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- Prior art keywords
- coil
- coupling
- resonant circuit
- coils
- coupling coil
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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 vehicle train, e.g. pedals
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/167—Circuit details
Definitions
- the invention relates to a method for phase modulation of a electromagnetic resonant circuit and an electromagnetic Oscillating circuit for carrying out the method.
- the method is suitable in particular for use in axle counting points (axle counters) of Treadles.
- Each axle counter contains metering points with two rail contacts and one or more evaluation units.
- Each axle counter monitors a track section assigned to it. detected the axle counter is a passing rail vehicle, the track section switched busy. Detects in the direction of travel of the rail vehicle nearest axle counter the passing rail vehicle, the Track section released again.
- Electronic rail contacts often consist of two at one Mounted on the rail, spatially consecutive transmission coils, which are fed with audio frequency alternating currents and two on the each opposite rail side arranged with the Transmit coils inductively coupled receiver coils.
- One send and one each Receiver coil together form a pulse generator.
- the in the Receive coil induced voltages will be near the Rail contact arranged evaluation unit supplied and evaluated there.
- the falling off and the phase rotation of the receiving voltages is due to the Coupling between the transmitting and receiving coils when passing a Vehicle wheel.
- the induced voltages in the receiver coils are in implemented digital signals from which finally direction-dependent Counts are derived.
- Prerequisite for proper operation of the electronic Rail contacts controlled axle counting systems is that of the Receiving coils passed to the evaluation Reception voltages in their amplitude not dependent on parameters are those who have nothing to do with the influence of the vehicle wheels.
- interference fields can adversely affect the operation of the Impact rail contacts. This can be the case in particular if the sensors by interference fields, for example, by eddy current brakes be generated.
- European patent application 03360046.1 discloses a method for increasing the signal-to-noise ratio at points of delivery of an axle counting system in which an artificially noisy signal is generated on the transmitter side from at least one transmission signal and the noisy signal is converted into the original signal for further processing on the receiver side.
- the transmission signal has been noisy. Accordingly, the original transmission signal can be reconstructed on the receiver side from the noisy signal.
- An interference signal is converted on the receiving side into a noise. Hence, no meaningful signal can be obtained from this. This noise can be removed by filtering.
- the transmission coil of the axle counter has a resonant oscillating circuit in order to achieve a maximum electromagnetic field strength of the transmission signal.
- the original transmit signal is phase modulated with digital noise, ie, 180 degrees each.
- digital noise ie, 180 degrees each.
- phase modulation in the prior art complex electronic circuits comprising amplifiers and bandpass filters used.
- Such electronic circuits modulate the phase of a Resonant circuit not directly. They are therefore in production, operation and maintenance consuming.
- the object of the invention is a method for phase modulation of a electric resonant circuit and an electromagnetic resonant circuit for Implementation of the method to provide the disadvantages of the prior art avoid the technique, in particular the 180 degree phase modulation with low cost, preferably for use in axle counters allow.
- the described by the Coil arrangement formed transformer acts as a modulation transformer.
- the opposite fields are preferably either the first and the second coupling coil wound in the opposite direction and are traversed in the same direction by electric current, or they are wrapped in the same direction and are in the opposite direction of a current flows through it.
- phase modulation phase shift keying
- the switching is made such that the Switching time is at a current zero crossing of the resonant circuit.
- the switching is then made when the resonant Element, i. the coils of the resonant circuit, are energyless.
- the voltage application of the Einkopplungsspulen is made such that after switching a 180 ° phase modulation of the resonant circuit results. This is done a modulation of the phase such that the electromagnetic field of the Resonator coil a digital noise can be impressed. This is suitable especially for the application of the method according to the invention for Purpose of an axle counter.
- an artificial noise of a transmission signal of the resonant circuit preferably in a transmitting coil of a rail contact in a counting point of a Achsterrorismsystems generated.
- a noisy magnetic field is generated on the transmitter side with the method according to the invention, from the receiving end, the original transmission signal is obtained.
- Such a magnetic field with a noise character can be generated particularly easily by the fed coil with the noisy signal of a rail contact.
- the noisy (electrical) transmission signal thus stimulates the transmitting coil.
- the transmitter coil generates a noisy transmission (magnet) field, which in turn is received by a receiver coil.
- the transmitting coil generates a magnetic field of constant frequency, which runs around the rail and which is evaluated by the receiver in magnitude and phase
- the invention generates a magnetic field with noise character, from which by the cancellation of the noise in the evaluation of the received signal, the original signal can be obtained.
- the electromagnetic resonant circuit for performing the The method according to the invention is achieved by a electromagnetic resonant circuit having a resonator coil and a first and a second coupling coil solved.
- the Incoil coils the primary side and the resonator coil the secondary side a transformer.
- Switching means are provided which are set up for switching a generator voltage from the first coupling coil to the second coupling coil, such that from the second Coupling coil at least partially to the magnetic field of the first Coupling coil opposite magnetic field can be generated.
- the coupling coils are connected in series and the switching means are each Einkopplungsspule a switch, wherein the switches are adapted to Connecting the generator voltage to the coupling coils, such that the coils in the opposite direction of an electric current be flowed through.
- This circuit allows a special compact circuit structure of the electromagnetic according to the invention Resonant circuit.
- the switching means to a modulator, wherein the switches can be switched by the modulator.
- a modulator e.g. a modulator
- Such a combination of one Modulator and switches as switching means allows control of the Switching time of the switches e.g. depending on one AC voltage with which the coupling coils are acted upon. This will e.g. enabling a generation of digital noise.
- the modulator is set up, the switch on a Switchover time as a function of the amplitude of the generator voltage switch. This allows the switching times to be selected that these are at a current zero crossing of the resonant circuit.
- the coupling coils of the resonance coil are galvanic separated.
- the modulation transmitter i. an arrangement of Einkopplungsspulen and the resonator coil can thereby to galvanic Separation of e.g. a transmitting coil of a rail contact and a Modulation circuit can be used.
- interference currents e.g. be produced by eddy current brakes of a rail vehicle, from the Modulation circuit shielded.
- An axle counting point with an electronic rail contact with a Transmitter with an electromagnetic resonant circuit according to the invention significantly increases the safety of rail transport.
- the invention is not limited to the above Embodiment. Rather, a number of variants is conceivable, which even with fundamentally different type of execution of the characteristics of Invention.
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Eletrric Generators (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Phasenmodulation eines elektromagnetischen Schwingkreises und einen elektromagnetischen Schwingkreis zur Durchführung des Verfahrens. Das Verfahren eignet sich insbesondere zum Einsatz in Achszählpunkten (Achszählern) von Schienenkontakten. The invention relates to a method for phase modulation of a electromagnetic resonant circuit and an electromagnetic Oscillating circuit for carrying out the method. The method is suitable in particular for use in axle counting points (axle counters) of Treadles.
In der Eisenbahnsignaltechnik werden zur Überwachung von Gleisabschnitten unter anderem Achszähler eingesetzt. Jeder Achszähler beinhaltet Zählpunkte mit zwei Schienenkontakten und eine oder mehrere Auswerteeinheiten.In railway signaling are used to monitor track sections used among other axle counter. Each axle counter contains metering points with two rail contacts and one or more evaluation units.
Jeder Achszähler überwacht einen ihm zugewiesenen Gleisabschnitt. Detektiert der Achszähler ein vorbeifahrendes Schienenfahrzeug, wird der Gleisabschnitt belegt geschaltet. Detektiert der in Fahrtrichtung des Schienenfahrzeugs nächstgelegene Achszähler das vorbeifahrende Schienenfahrzeug, wird der Gleisabschnitt wieder frei geschaltet.Each axle counter monitors a track section assigned to it. detected the axle counter is a passing rail vehicle, the track section switched busy. Detects in the direction of travel of the rail vehicle nearest axle counter the passing rail vehicle, the Track section released again.
Beim Vorüberlaufen eines Fahrzeugrades werden nacheinander zwei benachbarte Schienenkontakte betätigt und dabei werden zwei sich zeitlich überlappende Impulse ausgelöst. Diese Impulse werden in der Auswerteeinheit hinsichtlich ihrer Amplitude bewertet und in Zählimpulse umgesetzt, wobei die durch die Fahrrichtung der vorüberlaufenden Fahrzeugachsen gegebene Folge der Impulse die jeweilige Zählrichtung der Impulse bestimmt.When passing over a vehicle wheel are successively two adjacent rail contacts are actuated and thereby two are in time overlapping pulses triggered. These pulses are in the evaluation unit evaluated in terms of their amplitude and converted into counts, the given by the direction of travel of the passing vehicle axles episode the pulses determines the respective counting direction of the pulses.
Elektronische Schienenkontakte bestehen häufig aus zwei an einer Fahrschiene angebrachten, räumlich hintereinander liegenden Sendespulen, die mit tonfrequenten Wechselströmen gespeist werden und zwei auf der jeweils gegenüberliegenden Schienenseite angeordneten, mit den Sendespulen induktiv gekoppelten Empfangsspulen. Je eine Sende- und eine Empfangsspule bilden gemeinsam einen Impulsgeber. Die in den Empfangsspulen induzierten Spannungen werden einer in der Nähe des Schienenkontaktes angeordneten Auswerteeinheit zugeführt und dort bewertet. Als Indiz für das Vorüberlaufen eines Fahrzeugrades an einem Schienenkontakt wird das vorübergehende Abfallen und die Phasendrehung der in den Empfangsspulen induzierten Spannungen gewertet. Das Abfallen und die Phasendrehung der Empfangsspannungen ist bedingt durch die Kopplung zwischen den Sende- und Empfangsspulen beim Passieren eines Fahrzeugrades. Die in den Empfangsspulen induzierten Spannungen werden in digitale Signale umgesetzt, aus denen schließlich fahrrichtungsabhängige Zählimpulse abgeleitet werden.Electronic rail contacts often consist of two at one Mounted on the rail, spatially consecutive transmission coils, which are fed with audio frequency alternating currents and two on the each opposite rail side arranged with the Transmit coils inductively coupled receiver coils. One send and one each Receiver coil together form a pulse generator. The in the Receive coil induced voltages will be near the Rail contact arranged evaluation unit supplied and evaluated there. As an indication of the passing over of a vehicle wheel on a Rail contact becomes transient drop and phase rotation evaluated in the receiving coil induced voltages. The falling off and the phase rotation of the receiving voltages is due to the Coupling between the transmitting and receiving coils when passing a Vehicle wheel. The induced voltages in the receiver coils are in implemented digital signals from which finally direction-dependent Counts are derived.
Voraussetzung für einen ordnungsgemäßen Betrieb der von den elektronischen Schienenkontakten gesteuerten Achszählanlagen ist es, dass die von den Empfangsspulen an die Auswerteeinheit weitergegebenen Empfangsspannungen in ihrer Amplitude nicht auch von Parametern abhängig sind, die mit der Beeinflussung durch die Fahrzeugräder nichts zu tun haben. Insbesondere können sich Störfelder negativ auf die Funktionsweise der Schienenkontakte auswirken. Dies kann insbesondere dann der Fall sein, wenn die Sensoren durch Störfelder, die beispielsweise durch Wirbelstrombremsen erzeugt werden, beeinflusst werden.Prerequisite for proper operation of the electronic Rail contacts controlled axle counting systems is that of the Receiving coils passed to the evaluation Reception voltages in their amplitude not dependent on parameters are those who have nothing to do with the influence of the vehicle wheels. In particular, interference fields can adversely affect the operation of the Impact rail contacts. This can be the case in particular if the sensors by interference fields, for example, by eddy current brakes be generated.
Aus der europäischen Patentanmeldung 03360046.1 ist ein Verfahren zur
Erhöhung des Störabstands bei Zählpunkten eines Achszählsystems, bei dem
senderseitig mindestens aus einem Sendesignal ein künstlich verrauschtes
Signal erzeugt wird und empfängerseitig das verrauschte Signal in das
ursprüngliche Signal für die weitere Verarbeitung umgesetzt wird, bekannt. Im
Empfänger ist es bekannt, auf welche Art und Weise das Sendesignal
verrauscht wurde. Entsprechend kann empfängerseitig aus dem verrauschten
Signal das ursprüngliche Sendesignal rekonstruiert werden. Ein Störsignal wird
empfangsseitig in ein Rauschen umgewandelt. Daraus kann also kein
sinnvolles Signal gewonnen werden. Dieses Rauschen kann durch Filtern
beseitigt werden.
Die Sendespule des Achszählers weist einen resonanten Schwingkreis auf, um
eine maximale elektromagnetische Feldstärke des Sendesignals zu erreichen.
Ohne einen derartigen resonanten Schwingkreis könnten bei Achszählern
lediglich 10 Prozent der Sendeleistung erreicht werden. Das ursprüngliche
Sendesignal wird mit einem digitalen Rauschen, d.h. jeweils um 180 Grad,
phasenmoduliert. So kann insbesondere bei Modulation mit einem so
genannten Pseudo-Noise auf besonders einfache Art und Weise ein
breitbandiges, verrauschtes bzw. rauschartiges Signal erzeugt werden.European patent application 03360046.1 discloses a method for increasing the signal-to-noise ratio at points of delivery of an axle counting system in which an artificially noisy signal is generated on the transmitter side from at least one transmission signal and the noisy signal is converted into the original signal for further processing on the receiver side. In the receiver, it is known in what way the transmission signal has been noisy. Accordingly, the original transmission signal can be reconstructed on the receiver side from the noisy signal. An interference signal is converted on the receiving side into a noise. Hence, no meaningful signal can be obtained from this. This noise can be removed by filtering.
The transmission coil of the axle counter has a resonant oscillating circuit in order to achieve a maximum electromagnetic field strength of the transmission signal. Without such a resonant oscillating circuit only 10 percent of the transmission power could be achieved with axle counters. The original transmit signal is phase modulated with digital noise, ie, 180 degrees each. Thus, in particular in the case of modulation with a so-called pseudo noise, a broadband, noisy or noise-like signal can be generated in a particularly simple manner.
Für eine derartige Phasenmodulation werden im Stand der Technik komplexe elektronische Schaltungen, die Verstärker und Bandpass- Filter umfassen eingesetzt. Derartige elektronische Schaltkreise modulieren die Phase eines Schwingkreis nicht direkt. Sie sind daher in Herstellung, Betrieb und Wartung aufwendig.For such a phase modulation in the prior art complex electronic circuits comprising amplifiers and bandpass filters used. Such electronic circuits modulate the phase of a Resonant circuit not directly. They are therefore in production, operation and maintenance consuming.
Aufgabe der Erfindung ist es, ein Verfahren zur Phasenmodulation eines elektrischen Schwingkreises und einen elektromagnetischen Schwingkreis zur Durchführung des Verfahrens bereitzustellen, die die Nachteile des Standes der Technik vermeiden, insbesondere die eine 180 Grad Phasenmodulation mit geringem Aufwand, bevorzugt für den Einsatz in Achszählern, ermöglichen.The object of the invention is a method for phase modulation of a electric resonant circuit and an electromagnetic resonant circuit for Implementation of the method to provide the disadvantages of the prior art avoid the technique, in particular the 180 degree phase modulation with low cost, preferably for use in axle counters allow.
Gelöst wird diese Aufgabe erfindungsgemäß durch ein Verfahren zur Phasenmodulation eines elektromagnetischen Schwingkreises mit den Verfahrensschritten:
- Spannungsbeaufschlagung einer ersten Einkopplungsspule des Schwingkreises mit einer Generatorspannung,
- Spannungsbeaufschlagung einer zweiten Einkopplungsspule des Schwingkreises mit einer Generatorspannung derart, dass von der zweiten Einkopplungsspule ein mindestens teilweise zum magnetischen Feld der ersten Einkopplungsspule entgegengesetztes magnetisches Feld erzeugt wird, wobei die Einkopplungsspulen mit einer Resonatorspule des Schwingkreises derart zusammenwirken, dass die Einkopplungsspulen als Primärseite und die Resonatorspule als Sekundärseite eines Transformators wirken.
- Voltage application of a first coupling coil of the resonant circuit with a generator voltage,
- Voltage application of a second coupling coil of the oscillating circuit with a generator voltage such that the magnetic field of the first coupling coil opposite magnetic field is generated by the second coupling coil, wherein the coupling coils with a resonator coil of the resonant circuit cooperate such that the coupling coils as the primary side and the resonator coil act as a secondary side of a transformer.
Dabei wird die Spannungsbeaufschlagung der zweiten Einkopplungsspule durch Umschalten der Generatorspannung von der ersten Einkopplungsspule auf die zweite Einkopplungsspule zu einem Umschaltzeitpunkt, bevorzugt nach einem Modulationssignal, vorgenommen. Der durch die beschriebene Spulenanordnung gebildete Transformator wirkt als Modulationsüberträger. Um die entgegengesetzten Felder zu erzeugen, sind bevorzugt entweder die erste und die zweite Einkopplungsspule in entgegengesetzter Richtung gewickelt und werden in gleicher Richtung von elektrischem Strom durchflossen, oder sie sind in gleicher Richtung gewickelt und werden in entgegengesetzter Richtung von einem Strom durchflossen.In this case, the voltage application of the second coupling coil by switching the generator voltage from the first coupling coil to the second coupling coil at a switching time, preferably after a modulation signal made. The described by the Coil arrangement formed transformer acts as a modulation transformer. Around The opposite fields are preferably either the first and the second coupling coil wound in the opposite direction and are traversed in the same direction by electric current, or they are wrapped in the same direction and are in the opposite direction of a current flows through it.
Im Gegensatz zu Phasenmodulationsverfahren (Phasenumtastung) gemäß Stand der Technik werden für eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens lediglich wenige Bauteile benötigt. Es erfolgt eine direkte Phasenmodulation des Schwingkreises.In contrast to phase modulation (phase shift keying) according to State of the art are for a device for carrying out the inventive method requires only a few components. It takes place a direct phase modulation of the resonant circuit.
Bevorzugt wird das Umschalten derart vorgenommen, dass der Umschaltzeitpunkt an einem Strom-Nulldurchgang des Schwingkreises liegt. Das Umschalten wird dadurch dann vorgenommen, wenn das resonante Element, d.h. die Spulen des Schwingkreises, energielos sind.Preferably, the switching is made such that the Switching time is at a current zero crossing of the resonant circuit. The switching is then made when the resonant Element, i. the coils of the resonant circuit, are energyless.
Besonders bevorzugt wird die Spannungsbeaufschlagung der Einkopplungsspulen derart vorgenommen wird, dass nach dem Umschalten eine 180° Phasenmodulation des Schwingkreises resultiert. Hierdurch erfolgt eine Modulation der Phase derart, dass dem elektromagnetischen Feld der Resonatorspule ein digitales Rauschen aufgeprägt werden kann. Dies eignet sich besonders für die Anwendung des erfindungsgemäßen Verfahrens für die Zwecke eines Achszählers. Particularly preferred is the voltage application of the Einkopplungsspulen is made such that after switching a 180 ° phase modulation of the resonant circuit results. This is done a modulation of the phase such that the electromagnetic field of the Resonator coil a digital noise can be impressed. This is suitable especially for the application of the method according to the invention for Purpose of an axle counter.
Bevorzugt wird mit dem erfindungsgemäßen Verfahren ein künstliches
Rauschen eines Sendesignals des Schwingkreises, bevorzugt in einer
Sendespule eines Schienenkontaks in einem Zählpunkt eines
Achszählsystems, erzeugt.
Dabei wird senderseitig mit dem erfindungsgemäßen Verfahren ein
verrauschtes Magnetfeld erzeugt, aus dem empfangsseitig das ursprüngliche
Sendesignal gewonnen wird. Ein solches Magnetfeld mit Rauschcharakter kann
besonders einfach durch die mit dem verrauschten Signal gespeiste
Sendespule eines Schienenkontaktes erzeugt werden. Das verrauschte
(elektrische) Sendesignal regt also die Sendespule an. Die Sendespule erzeugt
ein verrauschtes Sende(magnet)feld, das wiederum von einer Empfangsspule
aufgenommen wird. Gegenüber einem Verfahren, bei dem die Sendespule ein
Magnetfeld mit konstanter Frequenz erzeugt, das um die Schiene herum
verläuft und das vom Empfänger nach Betrag und Phase ausgewertet wird,
wird erfindungsgemäß ein Magnetfeld mit Rauschcharakter erzeugt, aus dem
durch das Rückgängigmachen des Rauschens bei der Auswertung des
Empfangssignals das ursprüngliche Signal gewonnen werden kann.Preferably, with the method according to the invention, an artificial noise of a transmission signal of the resonant circuit, preferably in a transmitting coil of a rail contact in a counting point of a Achszählsystems generated.
In this case, a noisy magnetic field is generated on the transmitter side with the method according to the invention, from the receiving end, the original transmission signal is obtained. Such a magnetic field with a noise character can be generated particularly easily by the fed coil with the noisy signal of a rail contact. The noisy (electrical) transmission signal thus stimulates the transmitting coil. The transmitter coil generates a noisy transmission (magnet) field, which in turn is received by a receiver coil. Compared to a method in which the transmitting coil generates a magnetic field of constant frequency, which runs around the rail and which is evaluated by the receiver in magnitude and phase, according to the invention generates a magnetic field with noise character, from which by the cancellation of the noise in the evaluation of the received signal, the original signal can be obtained.
Hinsichtlich des elektromagnetischen Schwingkreises zum Durchführen des erfindungsgemäßen Verfahrens wird die Aufgabe durch einen elektromagnetischen Schwingkreis mit einer Resonatorspule und einer ersten und einer zweiten Einkopplungsspule gelöst. Dabei bilden die Einkopplungsspulen die Primärseite und die Resonatorspule die Sekundärseite eines Transformators. Es sind Umschaltmittel vorgesehen, die eingerichtet sind zum Umschalten einer Generatorspannung von der ersten Einkopplungsspule auf die zweite Einkopplungsspule, derart, dass von der zweiten Einkopplungsspule ein mindestens teilweise zum magnetischen Feld der ersten Einkopplungsspule entgegengesetztes magnetisches Feld erzeugbar ist. Durch den erfindungsgemäßen elektromagnetischen Schwingkreis werden die Vorteile des erfindungsgemäßen Verfahrens realisiert. With regard to the electromagnetic resonant circuit for performing the The method according to the invention is achieved by a electromagnetic resonant circuit having a resonator coil and a first and a second coupling coil solved. Here are the Incoil coils the primary side and the resonator coil the secondary side a transformer. Switching means are provided which are set up for switching a generator voltage from the first coupling coil to the second coupling coil, such that from the second Coupling coil at least partially to the magnetic field of the first Coupling coil opposite magnetic field can be generated. By the electromagnetic resonant circuit according to the invention are the Advantages realized by the method according to the invention.
Bevorzugt sind bei dem erfindungsgemäßen elektromagnetischen Schwingkreis die Einkopplungsspulen in Reihe geschaltet und die Umschaltmittel weisen je Einkopplungsspule einen Schalter, wobei die Schalter eingerichtet sind zum Aufschalten der Generatorspannung auf die Einkopplungsspulen, derart, dass die Spulen in entgegengesetzter Richtung von einem elektrischen Strom durchflossen werden. Diese Schaltungsanordnung ermöglicht einen besonders kompakten Schaltungsaufbau des erfindungsgemäßen elektromagnetischen Schwingkreises.Preferred in the inventive electromagnetic resonant circuit the coupling coils are connected in series and the switching means are each Einkopplungsspule a switch, wherein the switches are adapted to Connecting the generator voltage to the coupling coils, such that the coils in the opposite direction of an electric current be flowed through. This circuit allows a special compact circuit structure of the electromagnetic according to the invention Resonant circuit.
Bevorzugt weisen die Umschaltmittel einen Modulator auf, wobei die Schalter von dem Modulator umschaltbar sind. Eine derartige Kombination von einem Modulator und Schaltern als Umschaltmittel ermöglicht eine Steuerung des Umschaltzeitpunktes der Schalter z.B. in Abhängigkeit von einer Wechselspannung mit der die Einkopplungsspulen beaufschlagt werden. Dadurch wird z.B. ein Erzeugen eines digitalen Rauschens ermöglicht.Preferably, the switching means to a modulator, wherein the switches can be switched by the modulator. Such a combination of one Modulator and switches as switching means allows control of the Switching time of the switches e.g. depending on one AC voltage with which the coupling coils are acted upon. This will e.g. enabling a generation of digital noise.
Bevorzugt ist der Modulator eingerichtet, die Schalter an einem Umschaltzeitpunkt in Abhängigkeit von der Amplitude der Generatorspannung umzuschalten. Dadurch können die Umschaltzeitpunkte so gewählt werden, dass diese an einem Strom-Nulldurchgang des Schwingkreises liegen. Bevorzugt sind die Einkopplungsspulen von der Resonanzspule galvanisch getrennt. Der Modulationsüberträger, d.h. eine Anordnung der Einkopplungsspulen und der Resonatorspule kann dadurch zur galvanischen Trennung von z.B. einer Sendespule eines Schienenkontakts und einer Modulationsschaltung verwendet werden. Dadurch werden Störströme, die z.B. durch Wirbelstrombremsen eines Schienenfahrzeuges erzeugt werden, von der Modulationsschaltung abgeschirmt. Preferably, the modulator is set up, the switch on a Switchover time as a function of the amplitude of the generator voltage switch. This allows the switching times to be selected that these are at a current zero crossing of the resonant circuit. Preferably, the coupling coils of the resonance coil are galvanic separated. The modulation transmitter, i. an arrangement of Einkopplungsspulen and the resonator coil can thereby to galvanic Separation of e.g. a transmitting coil of a rail contact and a Modulation circuit can be used. As a result, interference currents, e.g. be produced by eddy current brakes of a rail vehicle, from the Modulation circuit shielded.
Ein Achszählpunkt mit einem elektronischen Schienenkontakt mit einem Sender mit einem erfindungsgemäßen elektromagnetischen Schwingkreis erhöht die Sicherheit des Schienenverkehrs erheblich.An axle counting point with an electronic rail contact with a Transmitter with an electromagnetic resonant circuit according to the invention significantly increases the safety of rail transport.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels der Erfindung, anhand der Figuren der Zeichnung, die erfindungswesentliche Einzelheiten zeigen, und aus den Ansprüchen. Die einzelnen Merkmale können je einzeln für sich oder zu mehreren in beliebiger Kombination bei einer Variante der Erfindung verwirklicht sein.Other features and advantages of the invention will become apparent from the following description of an embodiment of the invention, with reference to the figures of the drawing, the essential to the invention details show, and from the claims. The individual features can be individually for yourself or for several in any combination in a variant of Invention be realized.
Ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung ist in der schematischen Zeichnung dargestellt und wird in der nachfolgenden Beschreibung erläutert.
- Fig. 1
- zeigt ein Blockschaltbild eines erfindungsgemäßen Schwingkreises.
- Fig. 1
- shows a block diagram of a resonant circuit according to the invention.
In Fig. 1 ist stark schematisiert in einem Blockschaltbild ein erfindungsgemäßer
Schwingkreis zur 180 Grad Phasenmodulation dargestellt.
Die Phasenmodulation wird durch ein Umschalten von entgegengesetzt
gepolten als Primärwicklungen eines Modulationsüberträgers, d.h. eines
Transformators 10 ausgebildeten Einkopplungsspulen 1, 2 (Primärspulen)
erreicht. Die Primärspulenseite des Transformators umfasst also zwei
Primärspulen. Die Phasenmodulation des Transformators wird durch
Umschalten einer Wechselstromquelle, d.h. eines Generators 7 auf jeweils eine
der Primärspulen realisiert, wobei die Primärspulen entgegengesetzt gepolt
sind. Die Umschaltung wird durch einen Modulator 8 kontrolliert. Es sind also
Umschaltmittel 6 vorhanden, die eine Generatorspannung von einer auf die
andere Primärspule umschalten. Die Umschaltmittel 6 umfassen zwei Schalter
S1 und S2 und einen Modulator 8, der eingerichtet ist, die Schalter
umzuschalten. Die zwei Primärspulen 1, 2 sind in Reihe geschaltet. Der
Modulator 8 aktiviert die zwei Schalter S1 und S2 , wobei ein erster Schalter S1
den Generator 7 mit der ersten Primärspule 1 und ein zweiter Schalter S2 den
Generator 7 mit einer zweiten Primärspule 2 derart verbindet, dass die Spulen,
bei gleicher Orientierung der Spulenwicklungen, in entgegengesetzter Richtung
von Strom durchflossen werden können. Das resonante Element des
Schwingkreises, also die durch die Anordnung gemäß eines Transformators 10
im Modulationsüberträger mit Energie versorgte Resonatorspule 3 wird durch
das Umschalten der Primärspulen umgepolt. Bei der Resonatorspule 3 handelt
es sich um die Sekundärseite des Transformators 10. Dadurch wird eine
Phasendrehung um 180 Grad des Stromes durch die Resonatorspule 3, bzw.
des erzeugten elektromagnetischen Feldes erreicht. Die in der Figur
dargestellte Schaltung hat zwei Zustände:
The phase modulation is achieved by switching from oppositely poled as primary windings of a modulation transformer, ie, a
Die Erfindung beschränkt sich nicht auf das vorstehend angegebene Ausführungsbeispiel. Vielmehr ist eine Anzahl von Varianten denkbar, welche auch bei grundsätzlich anders gearteter Ausführung von den Merkmalen der Erfindung Gebrauch machen.The invention is not limited to the above Embodiment. Rather, a number of variants is conceivable, which even with fundamentally different type of execution of the characteristics of Invention.
Claims (10)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50302424T DE50302424D1 (en) | 2003-12-08 | 2003-12-08 | Method for phase modulation of an electrical and electromagnetic resonant circuit, in particular for axle counters |
AT03360140T ATE317788T1 (en) | 2003-12-08 | 2003-12-08 | METHOD FOR PHASE MODULATION OF AN ELECTRICAL AND ELECTROMAGNETIC SWITCHING CIRCUITS, PARTICULARLY FOR AXLE COUNTERS |
EP03360140A EP1541440B1 (en) | 2003-12-08 | 2003-12-08 | Method of phase modulation of an electrical and electromagnetic resonance circuit, in particular for axle counters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03360140A EP1541440B1 (en) | 2003-12-08 | 2003-12-08 | Method of phase modulation of an electrical and electromagnetic resonance circuit, in particular for axle counters |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1541440A1 true EP1541440A1 (en) | 2005-06-15 |
EP1541440B1 EP1541440B1 (en) | 2006-02-15 |
Family
ID=34486516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03360140A Expired - Lifetime EP1541440B1 (en) | 2003-12-08 | 2003-12-08 | Method of phase modulation of an electrical and electromagnetic resonance circuit, in particular for axle counters |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1541440B1 (en) |
AT (1) | ATE317788T1 (en) |
DE (1) | DE50302424D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7530534B2 (en) * | 2005-01-31 | 2009-05-12 | Alcatel | Method for setting an output voltage of a receiving circuit of a receiving head of a rail contact and rail contact system |
CN104290773A (en) * | 2014-10-31 | 2015-01-21 | 上海自仪泰雷兹交通自动化系统有限公司 | ACE machine frame for testing line and training center |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007023475B4 (en) | 2007-05-15 | 2009-07-09 | Siemens Ag | wheel sensor |
DE102007023476B4 (en) | 2007-05-15 | 2009-07-09 | Siemens Ag | wheel sensor |
DE102007031139A1 (en) | 2007-06-29 | 2009-01-02 | Siemens Ag | Method for increasing the interference immunity of a wheel sensor and wheel sensor for carrying out the method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB926976A (en) * | 1960-06-29 | 1963-05-22 | Siemens Ag | A vehicle-actuated track device |
US3395341A (en) * | 1964-01-15 | 1968-07-30 | Silec Liaisons Elec | Method and apparatus for detecting the velocity of moving metallic masses by means of phasedisplacements produced in magnetic windings |
US3721821A (en) * | 1970-12-14 | 1973-03-20 | Abex Corp | Railway wheel sensor |
-
2003
- 2003-12-08 EP EP03360140A patent/EP1541440B1/en not_active Expired - Lifetime
- 2003-12-08 DE DE50302424T patent/DE50302424D1/en not_active Expired - Lifetime
- 2003-12-08 AT AT03360140T patent/ATE317788T1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB926976A (en) * | 1960-06-29 | 1963-05-22 | Siemens Ag | A vehicle-actuated track device |
US3395341A (en) * | 1964-01-15 | 1968-07-30 | Silec Liaisons Elec | Method and apparatus for detecting the velocity of moving metallic masses by means of phasedisplacements produced in magnetic windings |
US3721821A (en) * | 1970-12-14 | 1973-03-20 | Abex Corp | Railway wheel sensor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7530534B2 (en) * | 2005-01-31 | 2009-05-12 | Alcatel | Method for setting an output voltage of a receiving circuit of a receiving head of a rail contact and rail contact system |
CN104290773A (en) * | 2014-10-31 | 2015-01-21 | 上海自仪泰雷兹交通自动化系统有限公司 | ACE machine frame for testing line and training center |
Also Published As
Publication number | Publication date |
---|---|
ATE317788T1 (en) | 2006-03-15 |
EP1541440B1 (en) | 2006-02-15 |
DE50302424D1 (en) | 2006-04-20 |
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