EP0918009B1 - Schienenkontakt für eine Achszähleinrichtung - Google Patents
Schienenkontakt für eine Achszähleinrichtung Download PDFInfo
- Publication number
- EP0918009B1 EP0918009B1 EP98440184A EP98440184A EP0918009B1 EP 0918009 B1 EP0918009 B1 EP 0918009B1 EP 98440184 A EP98440184 A EP 98440184A EP 98440184 A EP98440184 A EP 98440184A EP 0918009 B1 EP0918009 B1 EP 0918009B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- rail contact
- receiving
- reference signal
- supply device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005672 electromagnetic field Effects 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B61L1/163—Detection devices
- B61L1/165—Electrical
-
- 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
- B61L1/167—Circuit details
-
- 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
- B61L1/169—Diagnosis
Definitions
- the invention relates to a rail contact for an axle counting device the preamble of claim 1.
- Axle counting devices are mainly related to rail transport with track vacancy detection equipment, at level crossing protection and used for checking the integrity of trains.
- An axle counter usually includes several metering points and one usually in a signal box housed axle counter evaluation device, which from the metering points transmitted transmitted pulse evaluates.
- Each point of delivery in turn consists of one or two rail contacts and one in a separate housing housed evaluation circuit.
- Each rail contact has a transmitting and a receiving coil, which is usually are arranged on both sides of a railroad track.
- the transmitter coil generates an alternating electromagnetic field, which is generated by the receiving coil Will be received. If a wheel of a railway vehicle enters the Area of the alternating field occurs, this leads to a weakening of the Alternating field, whereby the signal received by the receiver coil drops. If the signal amplitude is an appropriately set threshold falls below, this is evaluated by the evaluation circuit as a wheel passage.
- Shape and level of the signal received by the receiving coil are subject diverse time-dependent influences. These include approximately the size of the in the rail current, the temperature of the transmission and Reception coil, mechanical misalignments and signs of wear on the railroad track. In the worst case, these influences can do so cause the point of delivery detects a wheel passage, although one has not taken place. The reverse case is also possible, i. H. on Wheel passage is not recognized by the point of delivery.
- the common rail contacts have in common that (partial) destruction of the rail contact from the point of delivery is not or not reliably is recognized. Such destruction can occur, for example come that a train passing over it or a construction vehicle The transmitter coil tears off the rail. It can then happen that the Point of delivery does not record a passing train without the error for the axle counting evaluation device would be recognizable in the signal box. This can be too cause serious danger to rail traffic, for example because a track occupancy message omitted.
- DD246089 discloses an axle counting device with two pairs of each a transmitting and receiving coil, which one behind the other along the rail are arranged.
- the coils are in series with an AC voltage source connected.
- the receiving coils when exposed to the wheel Temporary impulses are generated.
- axle counting device leads due to the redundant Design of the transmitting and receiving coils for better detection of Failures. However, mechanical adjustment of both transmitter coils is still possible necessary.
- the task is solved by a rail contact with the characteristics of the Claim 1.
- the field geometry of the alternating electromagnetic field generated change. This accomplishes two things. Firstly, by changing the field geometry, the external conditions mentioned above can be compensated without the need for mechanical adjustment is. Secondly, changing the field geometry allows a wheel passage simulate and in this way a self-test of the rail contact carry out.
- Fig. 1 shows a schematic representation of a rail contact SK according to the invention.
- the rail contact SK comprises a reception coil ES on one side of a rail SCH and two transmission coils SS1 and SS2 on the side of the rail SCH opposite the reception coil ES.
- the two transmission coils SS1 and SS2 can also be located on the same side of the rail SCH as the reception coil ES and also do not necessarily have to be arranged with respect to one another as shown in FIG. 1. It is only necessary to ensure that the two alternating fields emitted by the transmission coils SS1 and SS2 overlap at least in the area of the reception coil ES.
- 1 also shows schematically the field geometry FG1 of the sum field, which results from the superimposition of the two alternating fields emitted by the transmitter coils SS1 and SS2. The exact shape of the field geometry is not important for the invention.
- FIG. 1 also shows an AC voltage source WSQ and an adjustable one Voltage divider ST.
- the voltage divider ST two transmitter coils SS1 and SS2 with different AC voltages be charged.
- the field geometry can thus be divided by the division of the alternating voltages influence the sum field resulting from the overlay.
- Fig. 1 is a changed field geometry by a broken line FG2 indicated.
- the Circuit must at least ensure that at least one of the two Transmitter applied AC voltage within a certain Range is variable in its amplitude. It is conceivable, for example, that an unchangeable AC voltage is present at a transmitter coil and the other transmitter coil with an electronically controllable AC voltage source connected is. Which of the many options you ultimately choose decides, is mainly from those associated with the respective solution Costs depend.
- a typical time course of the receive voltage rectified in phase U shows FIG. 2.
- the threshold value is also shown SW, falling below it triggers a counting pulse. Take it with you Wheel passage at the reception coil ES tapped receiving voltage after some time due to changing external conditions, for example the signal curve drawn in dashed lines, so according to the invention the AC voltages applied to the transmitter coils SS1 and SS2 changed long until the received voltage returns to the original signal curve accepts. It is therefore not necessary to change the threshold value.
- the alternating voltages are preferably tracked at regular intervals time intervals.
- Fig. 3 shows a schematic diagram for a circuit with the help of which such Tracking can be carried out.
- the receiving coil ES is with this Circuit not only with an evaluation circuit generating the counting pulses, but also connected to a KOMP comparator.
- the Comparator KOMP also compares the signal curve of the received voltage a reference signal curve stored in the memory MEM.
- MEM can be a non-rewritable memory, so that the reference signal curve already when the rail contact is put into operation is present. It is also possible, as described above, for the reference signal curve only when the rail contact is started up on site, for example using a standard wheel.
- the reference waveform ensures in any case that the evaluation circuit wheel passages reliably registered with a sufficiently large signal-to-noise ratio.
- the comparator determines that the received from the stored waveform If there is a deviation that can be determined in advance, he provides this information to a programmable CPU, which has two controllable, AC voltage sources connected to the transmitter coils SS1 and SS2 Controls WSQ1 and WSQ2.
- the control takes place in such a way that when the next wheel passage, the received signal curve closer to the stored one Reference signal curve lies. In this way, the field geometry can be iteratively so adapt to changed external conditions until the course the received voltage approximately matches the reference signal curve.
- Another advantage of the rail contact according to the invention is that that the additional transmitter coil allows self-tests to be carried out.
- a continuous change in the AC voltages applied to the transmitter coils can also be used in the absence of a railway wheel Reception coil ES produce a reception signal which is a wheel passage has the corresponding course.
- Fig. 4 shows a schematic diagram for a circuit with the help of which Self test can be realized.
- the circuit based on that shown in Fig. 3 Circuit based, has a self-test control unit STSE, which is performing coordinated the self-test.
- a command from the self-test control unit STSE are made from a preferably rewritable memory MEM2 data read out to the CPU.
- the CPU controls the AC voltage sources WSQ1 and WSQ2 so that on the receiving coil ES the reference signal curve corresponding receive voltage can be tapped.
- the evaluation circuit AS outputs a count pulse.
- the evaluation circuit AS transmits the self-test control unit STSE that a wheel passage has been registered. Receives the self-locking control unit STSE no such feedback from the evaluation circuit AS, so notifies the self-test control unit STSE to the axle counting device that there is an error. Appropriate operational can then from the signal box Measures are taken.
- command to perform a self-test too can be transmitted from the interlocking from the point of delivery.
- adaptation of the field geometry to changed ones external conditions In this way, the need is eliminated immediately to make settings on the track contact on the track, which results in results in a significant cost reduction.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Valve Device For Special Equipments (AREA)
- Seats For Vehicles (AREA)
- Escalators And Moving Walkways (AREA)
- Platform Screen Doors And Railroad Systems (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Description
Claims (5)
- Schienenkontakt (SK) für eine Achszähleinrichtung mit einer Empfängerspule (ES) zum Empfangen eines elektromagnetischen Wechselfeldes,
dadurch gekennzeichnet, daß zur Erzeugung des elektromagnetischen Wechselfelds zwei Sendespulen (SS1, SS2) vorgesehen sind, welche so angeordnet sind, dass die beiden von den Sendespulen (SS1, SS2) ausgestrahlten Wechselfelder sich zumindest im Bereich der Empfangsspule (ES) überlappen. - Schienenkontakt nach Anspruch 1 mit einer Spannungsversorgungseinrichtung (WSQ, ST), die es ermöglicht, beide Sendespulen (SS1, SS2) mit unterschiedlichen Wechselspannungen zu versorgen, wobei mindestens eine der beiden Wechselspannungen innerhalb eines vorab festgelegten Bereiches frei wählbar ist.
- Schienenkontakt nach Anspruch 2, wobei die Spannungsversorgungseinrichtung (WSQ) einen Spannungsteiler (ST) aufweist, welcher eine einstellbare Aufteilung der von der Spannungsversorgungseinrichtung (WSQ) erzeugten Spannung auf die beiden Sendespulen (SS1, SS2) ermöglicht.
- Schienenkontakt nach Anspruch 2 mit:a) einem Speicher (MEM in Fig. 3), in dem ein Referenzsignalverlauf gespeichert ist,b) einem Vergleicher (KOMP), der den Verlauf der an der Empfangsspule (ES) abgegriffenen Empfangsspannung mit dem im Speicher (MEM) gespeicherten Referenzsignalverlauf vergleicht und ein Vergleichsergebnis ermittelt,c) einer Recheneinheit (CPU), die unter Berücksichtigung des vom Vergleicher (KOMP) gelieferten Vergleichsergebnis die Spannungsversorgungseinrichtung (WSQ1, WSQ2) so ansteuert, daß der Verlauf der bei einem Raddurchgang an der Empfangsspule (ES) abgreifbaren Empfangsspannung möglichst nahe beim Referenzsignalverlauf liegt.
- Schienenkontakt noch Anspruch 4, bei dema) eine Selbstteststeuerungseinheit (STSE) vorhanden ist, die die Durchführung eines Selbsttests koordiniert,b) ein zweiter Speicher (MEM2) vorhanden ist,c) und die Recheneinheit (CPU) auf ein Kommando der Selbstteststeuerungseinheit (STSE) hin die Spannungsversorgungseinrichtung (WSQ1, WSQ2) so unter Verwendung der im zweiten Speicher (MEM2) gespeicherten Daten ansteuert, daß der Verlauf der ohne Raddurchgang an der Empfangsspule (ES) abgreifbaren Empfangsspannung in etwa dem Referenzsignalverlauf entspricht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19745436 | 1997-10-15 | ||
DE19745436A DE19745436A1 (de) | 1997-10-15 | 1997-10-15 | Schienenkontakt für eine Achszähleinrichtung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0918009A2 EP0918009A2 (de) | 1999-05-26 |
EP0918009A3 EP0918009A3 (de) | 2001-09-26 |
EP0918009B1 true EP0918009B1 (de) | 2004-07-14 |
Family
ID=7845549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98440184A Expired - Lifetime EP0918009B1 (de) | 1997-10-15 | 1998-08-28 | Schienenkontakt für eine Achszähleinrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0918009B1 (de) |
AT (1) | ATE270988T1 (de) |
DE (2) | DE19745436A1 (de) |
ES (1) | ES2221139T3 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200918381A (en) * | 2007-09-03 | 2009-05-01 | Siemens Ag | Method for counting axles in rail vehicles |
TW200918382A (en) * | 2007-09-03 | 2009-05-01 | Siemens Ag | Method for counting axles in rail vehicles |
DE102012202194A1 (de) | 2012-02-14 | 2013-08-14 | Siemens Aktiengesellschaft | Sensoreinrichtung zum Detektieren eines sich entlang einer Fahrschiene bewegenden Rades |
DE102016201896A1 (de) * | 2016-02-09 | 2017-08-10 | Siemens Aktiengesellschaft | Sensoreinrichtung zum Erfassen einer Magnetfeldänderung sowie Verfahren zum Abgleichen einer solchen Sensoreinrichtung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3225166A1 (de) * | 1982-07-06 | 1984-01-12 | Gebhard Balluff Fabrik feinmechanischer Erzeugnisse GmbH & Co, 7303 Neuhausen | Metalldetektor |
DE3302883A1 (de) * | 1983-01-28 | 1984-08-02 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zum erzeugen von achszaehlimpulsen fuer achszaehlanlagen |
DD246089A1 (de) * | 1986-02-19 | 1987-05-27 | Werk F Signal Und Sicherungste | Schaltungsanordnung zur ueberwachung von achszaehleinrichtungen |
AT400429B (de) * | 1993-12-10 | 1995-12-27 | Vae Ag | Verfahren zum festlegen des abtastbereiches von fahrzeugbetätigten messeinrichtungen sowie einrichtung zum einstellen und justieren von messeinrichtungen an gleiswegen relativ zu radsensoren |
DE4405039A1 (de) * | 1994-02-17 | 1995-08-24 | Sel Alcatel Ag | Achszähler mit änderbarer Schwellwerteinstellung |
-
1997
- 1997-10-15 DE DE19745436A patent/DE19745436A1/de not_active Withdrawn
-
1998
- 1998-08-28 DE DE59811668T patent/DE59811668D1/de not_active Expired - Lifetime
- 1998-08-28 AT AT98440184T patent/ATE270988T1/de active
- 1998-08-28 ES ES98440184T patent/ES2221139T3/es not_active Expired - Lifetime
- 1998-08-28 EP EP98440184A patent/EP0918009B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19745436A1 (de) | 1999-04-22 |
EP0918009A3 (de) | 2001-09-26 |
ES2221139T3 (es) | 2004-12-16 |
DE59811668D1 (de) | 2004-08-19 |
ATE270988T1 (de) | 2004-07-15 |
EP0918009A2 (de) | 1999-05-26 |
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