EP0657337B1 - Fixation method of the scan area of vehicle actuated measuring devices and device for setting up and adjusting measuring devices at railways relative to wheel sensors - Google Patents
Fixation method of the scan area of vehicle actuated measuring devices and device for setting up and adjusting measuring devices at railways relative to wheel sensors Download PDFInfo
- Publication number
- EP0657337B1 EP0657337B1 EP94890203A EP94890203A EP0657337B1 EP 0657337 B1 EP0657337 B1 EP 0657337B1 EP 94890203 A EP94890203 A EP 94890203A EP 94890203 A EP94890203 A EP 94890203A EP 0657337 B1 EP0657337 B1 EP 0657337B1
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- Prior art keywords
- signal
- wheel
- signals
- measuring devices
- voltage
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- 238000000034 method Methods 0.000 title claims description 6
- 238000005259 measurement Methods 0.000 claims description 10
- 238000011156 evaluation Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
-
- 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
- B61L1/02—Electric devices associated with track, e.g. rail contacts
- B61L1/08—Electric devices associated with track, e.g. rail contacts magnetically actuated; electrostatically actuated
-
- 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
- B61L1/02—Electric devices associated with track, e.g. rail contacts
- B61L1/10—Electric devices associated with track, e.g. rail contacts actuated by electromagnetic radiation; actuated by particle radiation
-
- 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
- B61L1/14—Devices for indicating the passing of the end of the vehicle or train
-
- 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
- B61L1/16—Devices for counting axles; Devices for counting vehicles
Definitions
- the invention relates to a method for setting the Scanning range of vehicle-operated measuring devices, such as e.g. of hot runner location devices, in which a wheel sensor via a transmitter and two arranged on both sides of the transmitter Receiver has the signals of both receivers compared with each other and depending on the result of the Signal comparison a measurement is made as well as on a Device for setting and adjusting measuring devices Track paths relative to wheel sensors, with a base plate on which the wheel sensors are fixed and the measuring devices can be fixed in geometrically defined Distance to each other, the wheel sensors each have a transmitter coil and two assigned receiver coils.
- vehicle-operated measuring devices such as e.g. of hot runner location devices
- Wheel sensor elements By being arranged on both sides of a rail head Wheel sensor elements is an arrangement of the hot runner location system in a position in which the wheel sensors also exactly Determine the overflow of a wheel, not for spatial reasons possible.
- Wheel sensors have already become known from EP-A 340 660, which are characterized by the fact that they are only to one side of the rail head of a rail can be arranged.
- the wheel sensors that can be removed from this EP-A 340 660 consist for example on an inside of a rail of the Track-mounted coil system with an AC-powered Transmitter coil and two assigned receiver coils.
- the transmitter coils induce an induction voltage in the receiver coils. If there is a receiver coil in front of and behind the transmitter coil is arranged in the longitudinal direction of the rail, can for example, if the receiver coils are identical are and arranged at the same distance from the transmitter coil are identical in both receiver coils is induced to conclude that at this time a wheel runs in the middle above the sensor.
- EP-A 340 660 An electric one Evaluation of signals from such sensors is in EP-A 340 660 has already been proposed and it will be used with such a signal intersection evaluating circuit the exact location of the wheel center or the wheel axis.
- the hot runner location system can also be the location of the wheel be adjusted precisely, in particular by the fact that for one such sensor only for one side of the rail track the arrangement of the required sensor elements is required, an exact geometric correlation can also be maintained can.
- the invention now aims at a method of the beginning to create the type mentioned, with which given a given geometric Arrangement of the individual components for vehicle-operated Measuring devices, such as hot runner location devices in particular, also after the completion of all mechanical adjustment work a fine adjustment is made possible without that this is an increase in the construction of the facilities for determining the parts of such a vehicle-operated Measurement device results.
- a simple mechanical fixation of the parts found enough be and still an adjustability later still be possible.
- the method according to the invention exists to achieve this object essentially in that to or from at least one of the signals the receiver of a wheel sensor an adjustable, constant Signal is added or subtracted electrically, and that the Measurement depending on the evaluation of the comparison of the received signals of the receiver of the wheel sensor becomes. Because now at least one of the signals of the receiver an adjustable constant signal electrically from a wheel sensor is added or subtracted, the EP-A 340 660 outlined procedure for determining a Change signal intersection so that this intersection can be moved. For example, through addition of an electrical signal changed signal one of the two Receiver coils lead to a shift of the intersection the voltage curves of the two receiver coils, resulting in a electrical fine adjustment of the intersection is made possible.
- the shift of the intersection by the electrical Addition or subtraction of a DC component has to Consequence that, for example, a gate opening or gate closing time can be moved accordingly.
- a gate opening or gate closing time can be moved accordingly.
- the gate can be moved altogether or the Regulate the door width, which makes a high degree of adjustability possible given is.
- the inventive device for setting and adjusting of measuring devices on track paths relative to wheel sensors with a base plate on which the wheel sensors are fixed and the Measuring devices can be determined at a geometrically defined distance from each other, wherein the wheel sensors each have a transmitter coil and two assigned Have receiver coils is characterized in that that at least one voltage signal from a receiver coil is supplied to a computing circuit, which has a modified signal of the Voltage signal of the receiver coil forms, and that the output signal the arithmetic circuit and the voltage signal of the second receiver coil is fed to a comparator, the Output signal can be connected to the measuring device.
- the arithmetic circuit becomes a modified signal Receiver coil formed and when compared to the induced Voltage in the second receiver coil will shift the parameters relevant for the evaluation, e.g. of the intersection of the two signal curves for a given correlation or identity of the two signals.
- a simple arithmetic circuit is sufficient, whereby the training is made in a particularly simple manner, that the arithmetic circuit is designed as an addition circuit and adds an adjustable voltage value to the input signal or subtracted and / or as a multiplication or quotient circuit is formed, and with an adjustable factor multiplied or divided by this.
- An adjustable Voltage signal can be obtained simply by conventional means Circuits can be achieved.
- the device can be designed so that the arithmetic circuit an operational amplifier contains the inputs Signal of a receiver coil and a voltage source with adjustable Voltage is connected.
- FIG. 1 shows a schematic representation of an arrangement a vehicle-operated measuring device in the longitudinal direction of the rail seen, the rail is shown in section
- Fig. 2 shows a plan view of a measuring device
- FIG. 3 a detailed view of a wheel sensor from the inside of the track Seen here
- Fig. 4 shows the waveform as it with the wheel sensor 3 can be obtained without modification of the signals
- 5 shows the signal curve after electrical fine adjustment or Modification of the signals as originally received and are shown in Fig. 4.
- Fig. 1 denotes a rail, the rail foot is connected to a mounting plate 2.
- a wheel sensor 3 is arranged on the track.
- the construction of the The wheel sensor is selected so that it is on one side of the web the rail 1 is arranged so that to the other side of the web a hot runner location device 4 can be arranged.
- a wheel sensor 3 is shown schematically on the rail Wheel 5 can be seen, the axle journal 6 in the scanning area 7 the hot runner location system 4 arrives. Analog can over a further scanning range, the bearing temperature of the bearing 8 is also sampled will.
- a wheel sensor 3 comprises a central one Transmitter coil 11, being on both sides in the longitudinal direction of the rail offset, receiver coils 12 and 13 are arranged.
- the coil axes are here, as detailed in EP-A 340 660 set out, directed at the rail foot, which therefore as damping metal surface in the effective area under the receiver coils 12 and 13 lies.
- the axes are in the correct arrangement past the rail head and are against the possible Passage area of the wheel rim of this wheel 5 directed. As long as there is no wheel 5 in the effective range, enter two receiver coils 12 and 13 the largest possible output signals on.
- a new switching threshold can be set exactly and ⁇ t depending on ⁇ u, i.e. dependent on adjust the added voltage within wide limits and adjust.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Traffic Control Systems (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zum Festlegen des Abtastbereiches von fahrzeugbetätigten Meßeinrichtungen, wie z.B. von Heißläuferortungseinrichtungen, bei welchem ein Radsensor über einen Sender und zwei zu beiden Seiten des Senders angeordnete Empfänger verfügt, wobei die Signale beider Empfänger miteinander verglichen und in Abhängigkeit von dem Ergebnis des Signalvergleiches eine Messung vorgenommen wird sowie auf eine Einrichtung zum Einstellen und Justieren von Meßeinrichtungen an Gleiswegen relativ zu Radsensoren, mit einer Grundplatte, an welcher die Radsensoren festgelegt und die Meßeinrichtungen festlegbar sind in geometrisch definiertem Abstand zueinander, wobei die Radsensoren jeweils eine Sendespule und zwei zugeordnete Empfängerspulen aufweisen.The invention relates to a method for setting the Scanning range of vehicle-operated measuring devices, such as e.g. of hot runner location devices, in which a wheel sensor via a transmitter and two arranged on both sides of the transmitter Receiver has the signals of both receivers compared with each other and depending on the result of the Signal comparison a measurement is made as well as on a Device for setting and adjusting measuring devices Track paths relative to wheel sensors, with a base plate on which the wheel sensors are fixed and the measuring devices can be fixed in geometrically defined Distance to each other, the wheel sensors each have a transmitter coil and two assigned receiver coils.
Bei den bisherigen Heißläuferortungsanlage werden Radsensoren verwendet, deren Sender- bzw. Empfängereinheit zu beiden Seiten des Schienenkopfes montiert werden. Das durch das Rad beeinflußte Signal des Senders, welches vom Empfänger wiederum aufgenommen wird, wird bei diesen bekannten Einrichtungen bei Erreichen eines bestimmten Schwellenwertes mittels einer Auswerteschaltung als Toröffnungssignal für die Heißläuferortungsanlage umgesetzt. Dieses Toröffnungssignal wird in hohem Maße durch die Geschwindigkeit des Fahrzeuges bzw. die Umgebungstemperatur beeinflußt und es kommt zu Verschiebungen des Toröffnungs- und -schließsignales, wodurch die Genauigkeit der Messung der zu kontrollierenden Bauteile, wie im Besonderen der Radlager, leidet.In the previous hot runner location system, wheel sensors are used used, the transmitter or receiver unit on both sides of the rail head. That was influenced by the wheel Signal from the transmitter, which in turn is picked up by the receiver is reached at these known facilities a certain threshold value by means of an evaluation circuit implemented as a gate opening signal for the hot runner location system. This gate opening signal is largely determined by the speed of the vehicle or the ambient temperature and there are shifts in the door opening and closing signal, whereby the accuracy of the measurement of the controlled Components, such as wheel bearings in particular, suffer.
Durch die zu beiden Seiten eines Schienenkopfes angeordneten Radsensorelemente ist eine Anordnung der Heißläuferortungsanlage in einer Position, in welcher auch die Radsensoren exakt den Überlauf eines Rades feststellen, aus räumlichen Gründen nicht möglich.By being arranged on both sides of a rail head Wheel sensor elements is an arrangement of the hot runner location system in a position in which the wheel sensors also exactly Determine the overflow of a wheel, not for spatial reasons possible.
Aus der EP-A 340 660 sind Radsensoren bereits bekanntgeworden, welche sich dadurch auszeichnen, daß sie lediglich zu einer Seite des Schienenkopfes einer Schiene angeordnet werden können. Die aus dieser EP-A 340 660 entnehmbaren Radsensoren bestehen aus einem beispielsweise an einer Innenseite einer Schiene des Gleises montierbaren Spulensystem mit einer wechselstromgespeisten Sendespule und zwei zugeordneten Empfängerspulen. Die Senderspulen induzieren in den Empfängerspulen eine Induktionsspannung. Wenn jeweils eine Empfängerspule vor und hinter der Senderspule in Schienenlängsrichtung gesehen angeordnet ist, kann beispielsweise dann, wenn die Empfängerspulen identisch ausgebildet sind und in gleichem Abstand von der Sendespule angeordnet sind und in beiden Empfängerspulen eine identische Spannung induziert wird, darauf geschlossen werden, daß zu diesem Zeitpunkt ein Rad mittig über dem Sensor läuft. Eine elektrische Auswertung von Signalen derartiger Sensoren ist in der EP-A 340 660 bereits vorgeschlagen und es wird mit einer derartigen einen Signalschnittpunkt auswertenden Schaltung die genaue Ortung des Radmittelpunktes bzw. der Radachse ermöglicht. Durch die auf diese Weise ermöglichte exakte Festlegung eines geometrischen Ortes des Rades kann auch die Heißläuferortungsanlage exakt justiert werden, wobei insbesondere dadurch, daß für einen derartigen Sensor lediglich eine Seite des Schienenstranges für die Anordnung der erforderlichen Sensorelemente benötigt wird, auch eine exakte geometrische Korrelation eingehalten werden kann.Wheel sensors have already become known from EP-A 340 660, which are characterized by the fact that they are only to one side of the rail head of a rail can be arranged. The wheel sensors that can be removed from this EP-A 340 660 consist for example on an inside of a rail of the Track-mounted coil system with an AC-powered Transmitter coil and two assigned receiver coils. The transmitter coils induce an induction voltage in the receiver coils. If there is a receiver coil in front of and behind the transmitter coil is arranged in the longitudinal direction of the rail, can for example, if the receiver coils are identical are and arranged at the same distance from the transmitter coil are identical in both receiver coils is induced to conclude that at this time a wheel runs in the middle above the sensor. An electric one Evaluation of signals from such sensors is in EP-A 340 660 has already been proposed and it will be used with such a signal intersection evaluating circuit the exact location of the wheel center or the wheel axis. By the exact definition of a geometric that was made possible in this way The hot runner location system can also be the location of the wheel be adjusted precisely, in particular by the fact that for one such sensor only for one side of the rail track the arrangement of the required sensor elements is required, an exact geometric correlation can also be maintained can.
Für eine exakte Messung ist aber nicht nur eine geometrisch eindeutige Zuordnung der Lage der zu messenden Bereiche, welche von der Heißläuferortungsanlage erfaßt werden sollen, notwendig. Ebenso notwendig ist die Festlegung eines Toröffnungs- bzw. -schließsignales, mit welchem der Meßzeitpunkt exakt in Bezug auf die räumliche Geometrie der Messung getaktet werden soll. Bei den bisher bekannten Einrichtungen werden daher zwei Radsensoreinheiten festgelegt, die das Toröffnungs- und -schließsignal erzeugen. Derartige Radsensoren müssen nun in Schienenlängsrichtung justiert werden, wobei die entsprechenden Einstellungen durch mechanische Verstellung der Festlegung nur beschränkt variiert werden können. For an exact measurement, however, it is not just a geometrically clear one Assignment of the location of the areas to be measured, which of the hot runner location system are to be recorded, necessary. It is also necessary to define a gate opening or -closing signal with which the measurement time exactly in relation to be clocked on the spatial geometry of the measurement. In the previously known devices, two wheel sensor units are therefore used which defines the gate opening and closing signal produce. Such wheel sensors now have to be in the longitudinal direction of the rail be adjusted using the appropriate settings only limited by mechanical adjustment of the definition can be varied.
Die Erfindung zielt nun darauf ab, ein Verfahren der eingangs genannten Art zu schaffen, mit welchem bei vorgegebener geometrischer Anordnung der einzelnen Bauteile für fahrzeugbetätigte Meßeinrichtungen, wie insbesondere Heißläuferortungseinrichtungen, auch nachträglich nach Abschluß aller mechanischen Justierungsarbeiten noch eine Feineinstellung ermöglicht wird, ohne daß dies eine Vergrößerung des baulichen Aufwandes der Einrichtungen zum Festlegen der Teile einer derartigen fahrzeugbetätigten Meßeinrichtung zur Folge hat. Insbesondere soll mit einer einfachen mechanischen Festlegung der Teile das Auslangen gefunden werden und trotzdem eine Justierbarkeit auch nachträglich noch möglich sein.The invention now aims at a method of the beginning to create the type mentioned, with which given a given geometric Arrangement of the individual components for vehicle-operated Measuring devices, such as hot runner location devices in particular, also after the completion of all mechanical adjustment work a fine adjustment is made possible without that this is an increase in the construction of the facilities for determining the parts of such a vehicle-operated Measurement device results. In particular, with a simple mechanical fixation of the parts found enough be and still an adjustability later still be possible.
Zur Lösung dieser Aufgabe besteht das erfindungsgemäße Verfahren im wesentlichen darin, daß zu oder von wenigstens einem der Signale der Empfänger eines Radsensors ein einstellbares, konstantes Signal elektrisch addiert oder subtrahiert wird, und daß die Messung in Abhängigkeit von der Auswertung des Vergleiches der so erhaltenen Signale der Empfänger des Radsensors vorgenommen wird. Dadurch, daß nun wenigstens einem der Signale der Empfänger eines Radsensors ein einstellbares konstantes Signal elektrisch addiert oder subtrahiert wird, läßt sich die in der EP-A 340 660 skizzierte Vorgangsweise für die Bestimmung eines Signalschnittpunktes dahingehend verändern, daß dieser Schnittpunkt verschoben werden kann. Das beispielsweise durch Addition eines elektrischen Signales veränderte Signal einer der beiden Empfängerspulen führt zu einer Verschiebung des Schnittpunktes der Spannungskurven der beiden Empfängerspulen, wodurch eine elektrische Feinjustierung des Schnittpunktes ermöglicht wird. Die Verschiebung des Schnittpunktes durch die elektrische Addition oder Subtraktion eines Gleichanteiles hat hiebei zur Folge, daß beispielsweise ein Toröffnungs- oder Torschließungszeitpunkt entsprechend verschoben werden kann. Durch gleichläufiges oder gegenläufiges Verschieben von Toröffnung und Torschließung läßt sich das Tor insgesamt verschieben oder aber die Torbreite regulieren, wodurch nachträglich ein hohes Maß an Justierbarkeit gegeben ist. The method according to the invention exists to achieve this object essentially in that to or from at least one of the signals the receiver of a wheel sensor an adjustable, constant Signal is added or subtracted electrically, and that the Measurement depending on the evaluation of the comparison of the received signals of the receiver of the wheel sensor becomes. Because now at least one of the signals of the receiver an adjustable constant signal electrically from a wheel sensor is added or subtracted, the EP-A 340 660 outlined procedure for determining a Change signal intersection so that this intersection can be moved. For example, through addition of an electrical signal changed signal one of the two Receiver coils lead to a shift of the intersection the voltage curves of the two receiver coils, resulting in a electrical fine adjustment of the intersection is made possible. The shift of the intersection by the electrical Addition or subtraction of a DC component has to Consequence that, for example, a gate opening or gate closing time can be moved accordingly. Through co-movement or moving the door opening and closing in opposite directions the gate can be moved altogether or the Regulate the door width, which makes a high degree of adjustability possible given is.
Die erfindungsgemäße Einrichtung zum Einstellen und Justieren von Meßeinrichtungen an Gleiswegen relativ zu Radsensoren, mit einer Grundplatte, an welcher die Radsensoren festgelegt und die Meßeinrichtungen festlegbar sind in geometrisch definiertem Abstand zueinander, wobei die Radsensoren jeweils eine Sendespule und zwei zugeordnete Empfängerspulen aufweisen ist dadurch gekennzeichnet, daß wenigstens ein Spannungssignal einer Empfängerspule einer Rechenschaltung zugeführt ist, die an ihrem Ausgang ein modifiziertes Signal des Spannungssignals der Empfängerspule bildet, und daß das Ausgangssignal der Rechenschaltung sowie das Spannungssignal der zweiten Empfängerspule einem Komparator zugeführt ist, dessen Ausgangssignal mit der Meßeinrichtung verbindbar ist. Durch die Rechenschaltung wird hiebei ein modifiziertes Signal einer Empfängerspule gebildet und beim Vergleich mit der induzierten Spannung in der zweiten Empfängerspule wird die Verschiebung des für die Auswertung relevanten Parameters, wie z.B. des Schnittpunktes der beiden Signalverläufe bei vorgegebener Korrelation bzw. Identität der beiden Signale, erzielt. Für die erfindungsgemäße Einrichtung genügt eine einfache Rechenschaltung, wobei in besonders einfacher Weise die Ausbildung so getroffen ist, daß die Rechenschaltung als Additionsschaltung ausgebildet ist und zum Eingangssignal einen einstellbaren Spannungswert addiert oder subtrahiert und/oder als Multiplikations- oder Quotientenschaltung ausgebildet ist, und mit einem einstellbaren Faktor multipliziert bzw. durch diesen dividiert. Ein einstellbares Spannungssignal kann in einfacher Weise durch konventionelle Schaltungen erzielt werden. Üblicherweise kann ein derartiges Spannungssignal durch Spannungsabfall an einem definierten Widerstand generiert werden, wobei die Einstellbarkeit beispielsweise mit einfachen Potentiometern möglich wird. Der Umstand, daß in einfacher und konventioneller Weise die jeweils gewünschte Spannung variiert werden kann und die jeweils gewählte Spannung in der Folge konstant gehalten werden kann, ermöglicht eine besonders einfache nachträgliche Justierung, welche keinen Einwand auf den Bauaufwand der Festlegung der Einrichtungen der Meßeinrichtung ausübt. The inventive device for setting and adjusting of measuring devices on track paths relative to wheel sensors, with a base plate on which the wheel sensors are fixed and the Measuring devices can be determined at a geometrically defined distance from each other, wherein the wheel sensors each have a transmitter coil and two assigned Have receiver coils is characterized in that that at least one voltage signal from a receiver coil is supplied to a computing circuit, which has a modified signal of the Voltage signal of the receiver coil forms, and that the output signal the arithmetic circuit and the voltage signal of the second receiver coil is fed to a comparator, the Output signal can be connected to the measuring device. By the arithmetic circuit becomes a modified signal Receiver coil formed and when compared to the induced Voltage in the second receiver coil will shift the parameters relevant for the evaluation, e.g. of the intersection of the two signal curves for a given correlation or identity of the two signals. For the invention A simple arithmetic circuit is sufficient, whereby the training is made in a particularly simple manner, that the arithmetic circuit is designed as an addition circuit and adds an adjustable voltage value to the input signal or subtracted and / or as a multiplication or quotient circuit is formed, and with an adjustable factor multiplied or divided by this. An adjustable Voltage signal can be obtained simply by conventional means Circuits can be achieved. Usually such a Voltage signal due to voltage drop at a defined Resistance are generated, the adjustability for example with simple potentiometers. The fact, that in a simple and conventional manner each desired voltage can be varied and the selected one Voltage can be kept constant in the sequence a particularly simple subsequent adjustment, which no objection to the construction work involved in determining the facilities the measuring device exercises.
Gemäß einer besonders einfachen und betriebssicheren Ausbildung kann die Einrichtung so ausgebildet sein, daß die Rechenschaltung einen Operationsverstärker enthält an dessen Eingänge das Signal einer Empfängerspule und eine Spannungsquelle mit einstellbarer Spannung angeschlossen ist.According to a particularly simple and reliable training the device can be designed so that the arithmetic circuit an operational amplifier contains the inputs Signal of a receiver coil and a voltage source with adjustable Voltage is connected.
Die Erfindung wird nachfolgend an Hand eines in der Zeichnung
schematisch dargestellten Ausführungsbeispieles näher erläutert.
In dieser zeigen Fig. 1 eine schematische Darstellung einer Anordnung
einer fahrzeugbetätigten Meßeinrichtung in Schienenlängsrichtung
gesehen, wobei die Schiene im Schnitt dargestellt ist, Fig.
2 eine Draufsicht auf eine Meßeinrichtung, Fig. 3
eine Detailansicht auf einen Radsensor von der Gleisinnenseite
her gesehen, Fig. 4 den Signalverlauf, wie er mit dem Radsensor
nach Fig. 3 erhalten werden kann ohne Modifikation der Signale
und Fig. 5 den Signalverlauf nach elektrischer Feinjustierung
bwz. Modifikation der Signale, wie sie ursprünglich erhalten
wurden und in Fig. 4 dargestellt sind.The invention is described below using one in the drawing
schematically illustrated embodiment.
1 shows a schematic representation of an arrangement
a vehicle-operated measuring device in the longitudinal direction of the rail
seen, the rail is shown in section, Fig.
2 shows a plan view of a measuring device, FIG. 3
a detailed view of a wheel sensor from the inside of the track
Seen here, Fig. 4 shows the waveform as it with the
In Fig. 1 ist mit 1 eine Schiene bezeichnet, deren Schienenfuß
mit einer Montageplatte 2 verbunden ist. An der Innenseite des
Gleises ist ein Radsensor 3 angeordnet. Die Konstruktion des
Radsensors ist so gewählt, daß sie zur einen Seite des Steges
der Schiene 1 angeordnet ist, so daß zur anderen Seite des Steges
eine Heißläuferortungseinrichtung 4 angeordnet werden kann.
Auf der Schiene ist schematisch ein den Radsensor 3 überrollendes
Rad 5 ersichtlich, deren Achszapfen 6 in den Abtastbereich 7
der Heißläuferortungsanlage 4 gelangt. Analog kann über einen
weiteren Abtastbereich auch die Lagertemperatur des Lagers 8 abgetastet
werden.In Fig. 1, 1 denotes a rail, the rail foot
is connected to a
Wie sich aus der Darstellung nach Fig. 2 ergibt, ist zur einen
Seite des Schienenkopfes 9 eine Kombination aus zwei Radsensoren
3a, 3b angeordnet, wohingegen auf der Außenseite in der Draufsicht
die Heißläuferortungsanlage 4 in räumlich exakt justierter Weise
an der gleichen Montageplatte wie die Radsensoren 3a, 3b festgelegt
sind. Der zur Verfügung stehende Raum wird durch benachbarte
Schwellen 10 begrenzt.As can be seen from the illustration in FIG. 2, on the one hand
Side of the
Wie aus Fig. 3 ersichtlich ist, umfaßt ein Radsensor 3 eine zentrale
Sendespule 11, wobei zu beiden Seiten in Schienenlängsrichtung
versetzt, Empfängerspulen 12 und 13 angeordnet sind.
Die Spulenachsen sind hiebei, wie in der EP-A 340 660 ausführlich
dargelegt, auf den Schienenfuß gerichtet, welche daher als
bedämpfende Metallfläche im Wirkbereich unter den Empfängerspulen
12 und 13 liegt. Die Achsen verlaufen bei der korrekten Anordnung
am Schienenkopf vorbei und sind gegen den möglichen
Durchgangsbereich des Radkranzes dieses Rades 5 gerichtet.
Solange sich kein Rad 5 im Wirkbereich befindet, treten in
beiden Empfängerspulen 12 und 13 die größtmöglichen Ausgangssignale
auf. Wenn ein Rad 5 mit seinem Spurkranz in den Wirkbereich
oberhalb der Empfängerspulen 12 und 13 eintritt, wird eine Bedämpfung
wirksam, welche eine Verringerung des Ausgangssignales
der jeweiligen Empfängerspule 12 bzw. 13 zur Folge hat. Der Signalverlauf
der induzierten Spannungen in den Empfängerspulen 12
und 13 ist in Fig. 4 wiedergegeben und mit 12' und 13' bezeichnet.
Beim Vergleich der Signale der Spulen 12 und 13 läßt sich
ein exakter Schnittpunkt 14 in einer Auswerteschaltung ermitteln,
welcher räumlich und zeitlich mit demjenigen Punkt übereinstimmt,
bei welchem sich die Radachse mittig über den beiden
Empfängerspulen 12 und 13 und der Senderspule 11 befindet.3, a
Eine Feinjustierung dieses exakt definierten räumlichen Bezugspunktes,
wie er durch den Schnittpunkt 14 der Signalverlaufskurven
der Induktionsspannungen in den Spulen 12 und 13 gegeben
ist, läßt sich nun dadurch erzielen, daß das Signal einer der
beiden Empfängerspulen modifiziert wird. In besonders einfacher
Weise kann einfach dem Signal einer der beiden Empfängerspulen
ein vorbestimmter einstellbarer Spannungswert addiert werden.
Ein derartiger Gleichanteil ist bei der Darstellung nach Fig. 5
dem Signal der Empfängerspule 13 hinzugefügt, wodurch insgesamt
sich das Signal nach Addition des konstanten Gleichanteiles um
das Ausmaß Δu erhöht. Diese Spannungsdifferenz kann von einem
einfachen Potentiometer abgenommen werden und kann beispielsweise
einem Eingang eines Operationsverstärkers aufgegeben
werden, dessen zweitem Eingang das ursprüngliche Signal der
Spule 13 zur Verfügung gestellt wird. Durch die Anhebung des
Signalverlaufes der in der Empfängerspule 13 gemessenen Signale
um den Gleichanteil ergibt sich gleichzeitig eine Verschiebung
des ursprünglichen Schnittpunktes, bei welchem Gleichheit der
Signale festgestellt wurde, um eine Zeit Δt, wobei der neue
Schnittpunkt nunmehr mit 15 bezeichnet ist.A fine adjustment of this precisely defined spatial reference point,
as it passes through the
Durch diese zeitliche Verschiebung Δt, welche durch die Addition
eines konstanten Signales zum Signal einer der Empfängerspulen
erzielt wird, läßt sich eine neue Schaltschwelle exakt einstellen
und es läßt sich Δt in Abhängigkeit von Δu, d.h. in Abhängigkeit
von der addierten Spannung in weiten Grenzen verstellen
und einstellen. Durch die Addition eines derartigen Gleichanteiles
Δu zu Signalen von Empfängerspulen eines Radsensors
läßt sich somit entweder der Toröffnungszeitpunkt im Falle der
Verschiebung der Signale der Empfängerspule 12 oder der Torschließzeitpunkt
im Falle der Addition eines Signales zur
Signalverlaufskurve der Empfängerspule 13 entsprechend verschieben.
Bei gleichzeitiger Verschiebung beider Zeitpunkte in einem
ersten Radsensor (3a) und einem zweiten Radsensor (3b) kann die
gesamte Torbreite reguliert werden und es kann insgesamt lediglich
durch Änderung elektrischer Größen eine exakte zeitliche
und räumliche Justierung für die Optimierung des Meßzeitpunktes
erzielt werden.Through this time shift Δt, which is due to the addition
a constant signal to the signal of one of the receiver coils
is achieved, a new switching threshold can be set exactly
and Δt depending on Δu, i.e. dependent on
adjust the added voltage within wide limits
and adjust. By adding such a DC component
Δu to signals from receiver coils of a wheel sensor
can thus either the gate opening time in the case of
Shift of the signals of the
Claims (4)
- A method for determining the scanning region of vehicle-actuated measuring means such as, e.g., hot box detection means (4), wherein a wheel sensor (3) is equipped with a transmitter (11) and two receivers arranged on both sides of the transmitter, by comparing the signals of the two receivers and effecting a measurement as a function of the result of the comparison of said signals, characterized in that an adjustable constant signal is electrically added to, or subtracted from, at least one of the signals of the receivers (12, 13) of a wheel sensor (3) and said measurement is effected as a function of the evaluation of the comparison of the thus obtained signals of the receivers (12, 13) of the wheel sensor (3).
- A device for adjusting and setting measuring means (4) on tracks relative to wheel sensors (3a, 3b), comprising a base plate (2) to which the wheel sensors are fixed, and the measuring means are fixable, at a geometrically defined mutual distance, the wheel sensors each including a transmitter coil (11) and two associated receiver coils (12, 13), characterized in that at least one voltage signal of a receiver coil (12) is fed to a computing circuit forming a modified signal of the voltage signal of the receiver coil on its output, and that the output signal of the computing circuit as well as the voltage signal of the second receiver coil (13) are fed to a comparator whose output signal is connectable to the measuring means.
- A device according to claim 2, characterized in that the computing circuit is configured as an adding circuit adding to, or subtracting from, the input signal an adjustable voltage value and/or is configured as a multiplication or quotient circuit multiplying with an ajustable factor or dividing by the same.
- A device according to claim 2 or 3, characterized in that the computing circuit comprises an operational amplifier, to whose inputs is transmitted the signal of a receiver coil (13), on the one hand, and is connected a voltage source having an adjustable voltage, on the other hand.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT2499/93 | 1993-12-10 | ||
AT0249993A AT400429B (en) | 1993-12-10 | 1993-12-10 | METHOD FOR DETERMINING THE SCANING AREA OF VEHICLE-ACTUATED MEASURING DEVICES AND DEVICE FOR ADJUSTING AND ADJUSTING MEASURING DEVICES ON TRACKWAYS RELATIVE TO WHEEL SENSORS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0657337A1 EP0657337A1 (en) | 1995-06-14 |
EP0657337B1 true EP0657337B1 (en) | 1998-03-25 |
Family
ID=3535374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94890203A Expired - Lifetime EP0657337B1 (en) | 1993-12-10 | 1994-12-06 | Fixation method of the scan area of vehicle actuated measuring devices and device for setting up and adjusting measuring devices at railways relative to wheel sensors |
Country Status (8)
Country | Link |
---|---|
US (1) | US5483816A (en) |
EP (1) | EP0657337B1 (en) |
AT (1) | AT400429B (en) |
CA (1) | CA2137583A1 (en) |
DE (1) | DE59405523D1 (en) |
DK (1) | DK0657337T3 (en) |
ES (1) | ES2115197T3 (en) |
FI (1) | FI945794A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19745436A1 (en) * | 1997-10-15 | 1999-04-22 | Cit Alcatel | Rail track contact for axle counting device |
US6663053B1 (en) * | 2002-08-30 | 2003-12-16 | Introl Design, Inc. | Sensor for railcar wheels |
CN100410660C (en) * | 2003-12-20 | 2008-08-13 | 孙劲楼 | Double row comb electrode folding coil wheel pair magnaflux |
DE102008025188A1 (en) * | 2008-05-23 | 2009-12-03 | Siemens Aktiengesellschaft | Device for detecting the occupancy or free status of a track section |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2973430A (en) * | 1957-03-25 | 1961-02-28 | Servo Corp Of America | Railroad-car wheel locator |
US3016457A (en) * | 1957-09-30 | 1962-01-09 | Gen Railway Signal Co | Detection means for improperly lubricated journals |
DE1203816B (en) * | 1960-07-22 | 1965-10-28 | Deutsche Bundesbahn | Magnetically controlled rail contact device |
US3697745A (en) * | 1970-05-18 | 1972-10-10 | Gen Signal Corp | Flux nulled wheel detector |
US3721821A (en) * | 1970-12-14 | 1973-03-20 | Abex Corp | Railway wheel sensor |
BR8203508A (en) * | 1981-10-05 | 1983-06-07 | Servo Corp Of America | RAILROAD HOT CASE DETECTOR THEME |
AT397069B (en) * | 1988-05-03 | 1994-01-25 | Josef Frauscher Ing | DEVICE ON TRACKS TO GENERATE PRESENCE CRITERIA FOR RAILWAY WHEELS |
-
1993
- 1993-12-10 AT AT0249993A patent/AT400429B/en not_active IP Right Cessation
-
1994
- 1994-12-06 ES ES94890203T patent/ES2115197T3/en not_active Expired - Lifetime
- 1994-12-06 DK DK94890203T patent/DK0657337T3/en active
- 1994-12-06 EP EP94890203A patent/EP0657337B1/en not_active Expired - Lifetime
- 1994-12-06 DE DE59405523T patent/DE59405523D1/en not_active Expired - Fee Related
- 1994-12-08 CA CA002137583A patent/CA2137583A1/en not_active Abandoned
- 1994-12-09 US US08/352,582 patent/US5483816A/en not_active Expired - Fee Related
- 1994-12-09 FI FI945794A patent/FI945794A/en unknown
Also Published As
Publication number | Publication date |
---|---|
FI945794A0 (en) | 1994-12-09 |
DK0657337T3 (en) | 1999-01-04 |
US5483816A (en) | 1996-01-16 |
EP0657337A1 (en) | 1995-06-14 |
FI945794A (en) | 1995-06-11 |
AT400429B (en) | 1995-12-27 |
ES2115197T3 (en) | 1998-06-16 |
ATA249993A (en) | 1995-05-15 |
DE59405523D1 (en) | 1998-04-30 |
CA2137583A1 (en) | 1995-06-11 |
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