EP1258411A1 - Induktiver Schienenkontakt - Google Patents
Induktiver Schienenkontakt Download PDFInfo
- Publication number
- EP1258411A1 EP1258411A1 EP02360132A EP02360132A EP1258411A1 EP 1258411 A1 EP1258411 A1 EP 1258411A1 EP 02360132 A EP02360132 A EP 02360132A EP 02360132 A EP02360132 A EP 02360132A EP 1258411 A1 EP1258411 A1 EP 1258411A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- input
- comparator
- limiter
- rail contact
- filter circuit
- 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.)
- Granted
Links
- 230000001939 inductive effect Effects 0.000 title claims description 8
- 238000011045 prefiltration Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 description 3
- 230000036039 immunity Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000001629 suppression 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
Definitions
- the invention relates to an inductive rail contact.
- Inductive rail contacts are used in particular in the railway signaling technology used in axle counters. They are used for detection of axles of a passing train. Axle counters become Track vacancy detection used.
- the narrow, pulse-shaped disturbances stimulate the reception resonant circuit of the rail contact and it vibrates at the resonance frequency sinusoidal voltage. Since the resonance frequency is equal to that Usable frequency and the amplitude is significantly higher than that of the useful signal lies, the useful signal can no longer be evaluated.
- the object of the invention is to provide a rail contact, the Immunity to interference, especially from a linear one Eddy current brake, is increased.
- the figure shows an inductive pre-filter circuit according to the invention Rail contact.
- the pre-filter circuit has an input E and an output A. Output A is connected to the receiving head of the rail contact.
- Input E is connected to output A via a switch S.
- the pre-filter circuit includes a rectifier G, a low-pass filter TP, a comparator K, a limiter B, and two ohmic resistors R1, R2.
- the input of the rectifier G is connected to the input E.
- the output of the rectifier G is connected to the input of the low-pass filter TP connected.
- the output of the low pass filter TP is positive Input of the comparator K connected.
- the output of the comparator K is connected to the input of limiter B.
- the exit of the Limiter B is connected to the control input of switch S.
- Limiter B has a clock input T via which the limiter B is connected Clock signal is supplied.
- Resistor R1 and resistor R2 are connected in series and form one Voltage divider.
- the one connection of the resistor R1 is with a positive reference voltage connected, the other connection to the negative input of comparator K and the one connection of Resistor R2.
- the other connector of R2 is connected to input E.
- the AC input signal at input E is in the rectifier G rectified, integrated in the low pass filter TP and then the Comparator K fed.
- the AC input signal at input E is also about Resistor R2 supplied with a reduced amplitude comparator K.
- switch S Exceeds the input signal at the negative input of the comparator K the input signal at the positive input of the comparator K, e.g. on Due to a superimposed fault, switch S opens for the duration the malfunction, but at most for the duration determined by limiter B.
- m and n cycles in limiter B By choosing m and n cycles in limiter B, the permissible Ratio of maximum fault duration to undisturbed duration and thus the maximum duration of an open switch position; m and n are natural numbers greater than or equal to one.
- the pre-filter circuit described so far serves to suppress Interferences during the positive half-waves of the AC input signal at input E. Suppresses Disturbances during the negative half-waves of the AC input signal at input E can Prefilter circuit can be expanded as follows:
- An additional rectifier, a is added to the pre-filter circuit additional low pass filter, an additional comparator, two additional ohmic resistors.
- the output of the additional rectifier is connected to input E, the input of the additional rectifier with the input of the additional low pass filter.
- the output of the additional low pass filter is connected to the negative input of the additional comparator.
- the output of the additional comparator is connected to an additional one Input connected to limiter B.
- the additional resistors are connected in series and form one Voltage divider.
- One connection of the one resistor is with one negative reference voltage connected, the other connection to the positive input of comparator K and the one connection of other resistance.
- the other connector is the other resistor connected to input E.
- Limiter B linked the outputs of both comparators with an OR operation and controls switch S for both positive and negative Half-wave interference.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Electrophonic Musical Instruments (AREA)
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims (4)
- Induktiver Schienenkontakt, dadurch gekennzeichnet, dass eine Vorfilterschaltung vorgesehen ist, die geeignet ist bei Auftreten einer Störung im Wechselspannungseingangssignal ein Weiterleiten des Wechselspannungseingangssignals zu unterdrücken.
- Induktiver Schienenkontakt gemäß Anspruch 1, dadurch gekennzeichnet, dass die Vorfilterschaltung eine Reihenschaltung aus einem Gleichrichter (G), einem Tiefpassfilter (TP), einem Komparator (K) und einem Begrenzer (B) beinhaltet sowie einen Spannungsteiler (R1, R2) über den das Wechselspannungseingangssignal dem negativen Eingang des Komparators (K) mit reduzierter Amplitude zuführbar ist, und dass ein Schalter (S) vorgesehen ist, der zwischen Eingang (E) und Ausgang (A) der Vorfilterschaltung geschaltet ist und über den Begrenzer (B) angesteuert wird.
- Induktiver Schienenkontakt gemäß Anspruch 2, dadurch gekennzeichnet, dass der Begrenzer (B) geeignet ist, die Dauer der Öffnung des Schalters (S) für jedes Auftreten einer Störung auf eine maximale, durch den Begrenzer (B) festgelegten Dauer zu begrenzen.
- Induktiver Schienenkontakt gemäß Anspruch 2, dadurch gekennzeichnet, dass die Vorfilterschaltung eine Reihenschaltung aus einem weiteren Gleichrichter, einem weiteren Tiefpassfilter, einem weiteren Komparator beinhaltet sowie einen weiteren Spannungsteiler über den das Wechselspannungseingangssignal dem positiven Eingang des weiteren Komparators mit im Betrag reduzierter Amplitude zuführbar ist, und dass der weitere Gleichrichter mit dem Eingang der Vorfilterschaltung verbunden ist und der Ausgang des weiteren Komparators mit dem Begrenzer (B).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10123673A DE10123673A1 (de) | 2001-05-16 | 2001-05-16 | Induktiver Schienenkontakt |
| DE10123673 | 2001-05-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1258411A1 true EP1258411A1 (de) | 2002-11-20 |
| EP1258411B1 EP1258411B1 (de) | 2009-09-02 |
Family
ID=7684903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02360132A Expired - Lifetime EP1258411B1 (de) | 2001-05-16 | 2002-04-29 | Induktiver Schienenkontakt |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1258411B1 (de) |
| AT (1) | ATE441564T1 (de) |
| DE (2) | DE10123673A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138858A1 (de) * | 2007-05-15 | 2008-11-20 | Siemens Aktiengesellschaft | Radsensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD135023A1 (de) * | 1978-03-17 | 1979-04-04 | Seifert Hans Peter | Schaltungsanordnung zur automatischen austastung von stoerungen beim am-empfang |
| DE3235674A1 (de) * | 1982-09-27 | 1984-03-29 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zum erzeugen von achszaehlimpulsen fuer achszaehlanlagen |
| DE19641392A1 (de) | 1996-09-27 | 1998-04-02 | Siemens Ag | Sensor |
-
2001
- 2001-05-16 DE DE10123673A patent/DE10123673A1/de not_active Withdrawn
-
2002
- 2002-04-29 DE DE50213807T patent/DE50213807D1/de not_active Expired - Lifetime
- 2002-04-29 AT AT02360132T patent/ATE441564T1/de not_active IP Right Cessation
- 2002-04-29 EP EP02360132A patent/EP1258411B1/de not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD135023A1 (de) * | 1978-03-17 | 1979-04-04 | Seifert Hans Peter | Schaltungsanordnung zur automatischen austastung von stoerungen beim am-empfang |
| DE3235674A1 (de) * | 1982-09-27 | 1984-03-29 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zum erzeugen von achszaehlimpulsen fuer achszaehlanlagen |
| DE19641392A1 (de) | 1996-09-27 | 1998-04-02 | Siemens Ag | Sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138858A1 (de) * | 2007-05-15 | 2008-11-20 | Siemens Aktiengesellschaft | Radsensor |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE441564T1 (de) | 2009-09-15 |
| EP1258411B1 (de) | 2009-09-02 |
| DE50213807D1 (de) | 2009-10-15 |
| DE10123673A1 (de) | 2002-11-21 |
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