EP0958985A2 - Schaltungsanordnung zur Überwachung von Betriebskenndaten von eisenbahntechnischen Sicherheitsmeldeanlagen - Google Patents
Schaltungsanordnung zur Überwachung von Betriebskenndaten von eisenbahntechnischen Sicherheitsmeldeanlagen Download PDFInfo
- Publication number
- EP0958985A2 EP0958985A2 EP99890161A EP99890161A EP0958985A2 EP 0958985 A2 EP0958985 A2 EP 0958985A2 EP 99890161 A EP99890161 A EP 99890161A EP 99890161 A EP99890161 A EP 99890161A EP 0958985 A2 EP0958985 A2 EP 0958985A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- circuit arrangement
- voltage
- arrangement according
- integrated
- 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
- 238000012544 monitoring process Methods 0.000 title claims abstract description 10
- 230000011664 signaling Effects 0.000 title description 11
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 238000012549 training Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000010079 rubber tapping Methods 0.000 abstract 2
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- 238000012806 monitoring device Methods 0.000 description 11
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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
- B61L1/169—Diagnosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
Definitions
- the invention relates to a circuit arrangement for Monitoring of operational characteristics of railway engineering Security alarm systems, such as Track vacancy detection systems, track circuit relays or axle counters with which measuring voltages tapped and evaluated via an electrical resistor become.
- Track vacancy detection systems are used to monitor railway lines, to ensure safety when driving on.
- a Measurement of the track circuit with such a system suitable for areas of application of around 1500 m monitoring distance.
- training courses which the entering and leaving axes within a test section record by axle counter.
- the measuring section be chosen accordingly larger.
- the vehicle axles form the insulated section a low-resistance electrical shunt to Track relay, over which a secondary current flows.
- the remaining one Electricity is reduced to a small remaining amount, whereby the track relay drops out and the track section as is reported busy.
- the auxiliary voltage, the track voltage and due the formation of the track relay as a motor relay the phase shift essential.
- One for every design Motor relays are very specific limit values of these Observe operating data so that the function is retained safely remains.
- axle counting devices When using axle counting devices are usually defines a plurality of metering points, which are at least on Start and end of a defined section and in a meter located in a signal box. Points of delivery can be found from wheel sensors, rail contacts and an associated electronic junction box may be formed. Rail contacts can consist of transmitters and receivers, which are mounted opposite on the rail track. Training Such axle counters can also detect directions enable, the signals of different metering points or the Receiving coils of such counting devices as far as possible same branches are processed. Usually the measured voltages amplified, rectified and then to Control of a voltage / limit converter used. These converters deliver two basic frequencies when not in use.
- Devices for monitoring track sections are, for example DE 36 34 696 A1, DE 44 05 039 A1, the CH 684 257 A5, DE 196 31 564 or DE 42 21 779 A1 remove.
- AT 316 644 B shows a circuit arrangement in Axle counting systems described, which the functionality of Monitoring of counting points and responding when a certain one Malfunction, such as the failure of a voltage signal occured.
- Monitoring devices of the known type mostly set additional sensors and additional facilities ahead so that in addition to the fact that errors are only recognized when they occur are not only increasing the design effort, but also the meaningfulness of such interference signals depends on the level of redundancy chosen.
- the invention now aims at a circuit arrangement of the to create the type mentioned above, with which the surveillance of operational characteristics of railroad security alarm systems more conventional without impairing the safe functioning Security systems is guaranteed.
- the circuit arrangement according to the invention aims at, too impermissible in the event of faults and defects in the circuit arrangement Signals safely from the railroad security alarm system to decouple, so that the tried and tested components of railway engineering Security systems through the additional Monitoring device will not be affected in any way.
- a monitoring device separate from the security alarm system must be trained to ensure that also Defects in the monitoring device have no negative effects may have on the security alarm system.
- the circuit arrangement according to the invention exists to achieve this object essentially in that the circuitry one input resistor symmetrically in each measuring line and a suppressor diode parallel to the tap resistor or contains a bidirectional Zener diode. Because the Circuitry symmetrically one in each measuring line Has input resistance, it is first ensured that Defects or short circuits in the subsequent monitoring device only via the input resistors to the security alarm system can react, whereby the voltage drop or the maximum current flowing through these input resistors in Short circuit at an uncritical level for the security alarm system can be held.
- the training is advantageously taken so that the Tap resistance is designed as a voltage divider and in the sub-circuits capacitors for the formation of amplitude-limiting Has low passes.
- the use of such Capacitors for switching off high-frequency interference signals implies the use of capacitors of low capacitance ahead. Voltage peaks become effective from bidirectional Z diodes or suppressor diodes suppressed.
- the training is made in a particularly simple manner that the circuit arrangement is an integrated galvanic isolating circuit contains.
- Such integrated isolating circuits can in a simple way as an instrument amplifier, as an isolation amplifier and be designed as a DC / DC converter, in particular the DC / DC converter part in the event of a defect in the Isolation circuit give rise to undesired interference voltages which could be effective from the suppressor diode or the bidirectional Zener diode can be eliminated.
- spark gap arranged.
- Such a spark gap can be designed so that when they are addressed causes the signal lines to melt, causing a defective one integrated isolating circuit in a galvanically perfect manner is separated from the input terminals of the monitoring device and thus a safety-related undesirable effect can be excluded.
- a further improvement in security can be achieved through be that the integrated isolating circuit via series resistors connected to the voltage divider and the suppressor diode is, in the event of a short-term increase in current in defective Circuit parts of the monitoring device the current over these series resistances can be limited and otherwise with Safety from the suppressor diode or the bidirectional Zener diode can be derived.
- a basic circuit arrangement is shown in the drawing, which is designed for different voltages.
- the input terminals are labeled 1 and 2, respectively the input resistors are labeled R1 and R2. It is further a voltage divider consisting of the resistors R3 and R4 is provided, which acts as a tap resistance. Alternatively, when using other input terminals, the Resistor R5 is available as a tap resistor.
- Capacitors C1 and C2 are located in the input circuit, which form a low pass for high-frequency interference.
- a suppressor diode DS1 is connected in parallel with the tap resistor switched over which impermissible voltages or impermissible Currents are derived.
- the signals pass through further input resistors R6 and R7, the input terminals 3 and 4 of the integrated circuit, which causes the galvanic isolation through a spark gap FST are bridged.
- the integrated Circuit U1 becomes supply voltage via pins 10, 15 supplied, the supply voltage in the of the railway safety system in the galvanically isolated Part of the integrated circuit is supplied.
- the galvanic Separation is indicated schematically with GT.
- the resistors used in the voltage measuring module are are precision metal film resistors, for which defined Failure characteristics are available.
- the safety design allows that such a resistance is extremely high resistance due to interruption or acts as galvanic isolation. A short circuit of such However, safety resistances are excluded. While the resistance value changes due to the safety design can increase is the decrease in the resistance value limited to a 10% reduction.
- R1 or R2 disconnects this Voltage measuring module from the safety device and it can no more measured variables are recorded. Influencing the Security alarm system is not possible.
- a reduction in the resistance values by the maximum permissible 10% with a safety design is also falsified only the measured value evaluation, but has the functionality the security system or the security system Impact.
- the resistors R1 to R7 become cold, i.e. low power, operated so that only a slight heating of the resistors occur can.
- the influence of changes and especially enlargements the heat resistance is at best through caused the ambient temperature and has due to the low implemented performance negligible effects.
- the capacitors C1 and C2 form together with the input voltage part a low pass and serve to suppress unwanted Frequency components.
- An interruption in the capacitor C1 or C2 would mean an increase in the cutoff frequency, what only the filter properties of the input circuit of the measuring module, but does not affect the function the safety system and no danger in the signaling Brings with it senses.
- a short circuit caused by C1 means a bridging of the resistor R3. In this way there is a slight increase in the current taken from the test object Micro amp range. Influencing the function of the security system and the danger in the signaling sense occurs however, due to the input resistances R1 and R2 not one. The same applies to the short circuit caused by C2.
- the electronic device includes the track vacancy detection system generator assemblies, bandpass assemblies with power supply, trigger amplifier modules and Pulse shaping assemblies, especially with digital delay.
- Frequency generators feed the transmitter coils of the rail contact.
- the alternating fields generated are in associated receiving coils depending on the strength of the coupling different voltages induce.
- the induced voltages which are amplified and then rectified, each control astable Multivibrators. If the rail contacts are not used, the given two nominal frequencies, the generated square wave voltages the applied control voltages and so with the Receiving voltages are proportional.
- the receive voltage rises or falls increased or decreased when running through a wheel the frequency accordingly.
- This mode of operation shows that when not in use Counting point at the terminals of the receiving voltage a certain one Quiescent voltage is present, which determines a first nominal frequency.
- This nominal frequency is in the pass band's pass band, so that at its output the AC voltage with the nominal frequency occurs with an amplitude after gain and rectification provides a relaxation value that is above the switching threshold of the Schmitt trigger.
- This voltage rise now controls the astable multivibrators such that there is an increase in frequency is coming. If this frequency is now the pass band of the Leaving bandpass filter, the AC amplitude becomes strong subdued. The resulting drop in voltage at the input of the Schmitt-Triggers finally leads to the positive edge of the Axle counting pulse.
- a fault in the integrated circuit causes the input terminals to fail of the IC to output terminals and the component itself to the generator, the voltages with any amplitudes, frequencies and generated phase and its signals over the passive input voltage divider in the respective signal system be fed.
- Limiting the amount of such Incorrect voltage, which may be caused by a faulty voltage measuring module can be fed in takes place through the spark gap, on the circuit board of the voltage measuring module between arranged the signal input pins of the integrated component is.
- this spark gap is the maximum possible voltage that a faulty voltage measuring module can generate, limits and remains improper adjusted metering point without impairment of function and therefore without any risk in terms of signaling safety.
- An equivalent failure of a second voltage measurement module leads to such a malfunction of a voltage measurement module revealed before further failures of components of the second voltage measuring module to one equivalent malfunction.
- the limit value for the failure disclosure time is always well above the time limits, specified by the manufacturer for metering points. Of the Failure of a voltage measuring module is thus revealed before equivalent failure of the second voltage measurement module occur can. Even in the most physically of a defective assembly limit voltage that can be achieved as an active component can be a Free registration does not take place, so also taking into account the most unlikely sources of error a defective IC in the worst case, no danger to the signaling Can bring security.
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)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control And Safety Of Cranes (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
Description
Claims (6)
- Schaltungsanordnung zur Überwachung von Betriebskenndaten von eisenbahntechnischen Sicherheitsmeldeanlagen, wie z.B. Gleisfreimeldeanlagen, Gleisstromkreisrelais oder Achszählern, mit welcher Meßspannungen über einen elektrischen Widerstand abgegriffen und ausgewertet werden, dadurch gekennzeichnet, daß die Schaltungsanordnungen in jeder Meßleitung symmetrisch je einen Eingangswiderstand (R1,R2) und parallel zum Abgriffswiderstand eine Suppressordiode bzw. eine bidirektionale Z-Diode (DS1) enthält.
- Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Abgriffswiderstand als Spannungsteiler (R3,R4) ausgebildet ist und in den Teilkreisen Kondensatoren (C1,C2) zur Ausbildung von amplitudenbegrenzenden Tiefpässen aufweist.
- Schaltungsanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schaltungsanordnung eine integrierte galvanische Trennschaltung (GT) enthält.
- Schaltungsanordnung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß eine integrierte Trennschaltung (GT) als Instrumentenverstärker, als Isolationsverstärker und als DC/DC-Wandler ausgebildet ist.
- Schaltungsanordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß parallel zum Eingang (3,4) der integrierten Trennschaltung (GT) eine Funkenstrecke (FST) angeordnet ist.
- Schaltungsanordnung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die integrierte Trennschaltung (GT) über Serienwiderstände (R6,R7) mit dem Spannungsteiler (R3,R4) und der Suppressordiode (DS1) verbunden ist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99890161T ATE311320T1 (de) | 1998-05-20 | 1999-05-19 | Schaltungsanordnung zur überwachung von betriebskenndaten von eisenbahntechnischen sicherheitsmeldeanlagen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0087098A AT406856B (de) | 1998-05-20 | 1998-05-20 | Schaltungsanordnung zur überwachung von betriebskenndaten von eisenbahntechnischen sicherheitsmeldeanlagen |
AT87098 | 1998-05-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0958985A2 true EP0958985A2 (de) | 1999-11-24 |
EP0958985A3 EP0958985A3 (de) | 2002-05-22 |
EP0958985B1 EP0958985B1 (de) | 2005-11-30 |
Family
ID=3501712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99890161A Expired - Lifetime EP0958985B1 (de) | 1998-05-20 | 1999-05-19 | Schaltungsanordnung zur Überwachung von Betriebskenndaten von eisenbahntechnischen Sicherheitsmeldeanlagen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0958985B1 (de) |
AT (2) | AT406856B (de) |
DE (1) | DE59912851D1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004076256A1 (en) * | 2003-02-28 | 2004-09-10 | Cdsrail Limited | Condition monitoring apparatus for track circuits and method |
EP3133449A1 (de) * | 2014-05-14 | 2017-02-22 | Huawei Technologies Co., Ltd | Überwachungsschaltung und elektronische vorrichtung |
CN109131437A (zh) * | 2018-08-23 | 2019-01-04 | 深圳科安达电子科技股份有限公司 | 计轴轨道电路系统 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3634696A1 (de) * | 1986-10-11 | 1988-04-14 | Standard Elektrik Lorenz Ag | Einrichtung zur ueberwachung eines gleisabschnittes |
DD282299A5 (de) * | 1989-04-12 | 1990-09-05 | Wasserversorgung Abwasse | Schaltung zum ueberwachen des betriebsstromes in stromkreisen von gleichstrom-elektroenergieverbrauchern |
DD282300A5 (de) * | 1989-04-12 | 1990-09-05 | Wasserversorgung Abwasse | Schaltung zum ueberwachen des betriebsstromes in stromkreisen von einphasenwechselstrom-elektroenergieverbrauchern |
DE3908236A1 (de) * | 1989-03-14 | 1990-09-20 | Dehn & Soehne | Ueberspannungsschutz, insbesondere ueberspannungsschutzgeraet |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD212932A1 (de) * | 1982-12-20 | 1984-08-29 | Werk Signal Sicherungstech Veb | Eigensichere elektronische schaltungsanordnung zur ueberwachung einer signallampe |
DE3442838A1 (de) * | 1984-11-23 | 1986-05-28 | Siemens AG, 1000 Berlin und 8000 München | Einrichtung zum steuern eines passiven gleismagneten |
US5001587A (en) * | 1989-05-24 | 1991-03-19 | Square D Company | Protection circuit for railroad signaling high voltage surge protection circuit |
DE4133090A1 (de) * | 1991-09-30 | 1993-04-01 | Siemens Ag | Stromversorgungseinheit |
-
1998
- 1998-05-20 AT AT0087098A patent/AT406856B/de not_active IP Right Cessation
-
1999
- 1999-05-19 DE DE59912851T patent/DE59912851D1/de not_active Expired - Lifetime
- 1999-05-19 EP EP99890161A patent/EP0958985B1/de not_active Expired - Lifetime
- 1999-05-19 AT AT99890161T patent/ATE311320T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3634696A1 (de) * | 1986-10-11 | 1988-04-14 | Standard Elektrik Lorenz Ag | Einrichtung zur ueberwachung eines gleisabschnittes |
DE3908236A1 (de) * | 1989-03-14 | 1990-09-20 | Dehn & Soehne | Ueberspannungsschutz, insbesondere ueberspannungsschutzgeraet |
DD282299A5 (de) * | 1989-04-12 | 1990-09-05 | Wasserversorgung Abwasse | Schaltung zum ueberwachen des betriebsstromes in stromkreisen von gleichstrom-elektroenergieverbrauchern |
DD282300A5 (de) * | 1989-04-12 | 1990-09-05 | Wasserversorgung Abwasse | Schaltung zum ueberwachen des betriebsstromes in stromkreisen von einphasenwechselstrom-elektroenergieverbrauchern |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004076256A1 (en) * | 2003-02-28 | 2004-09-10 | Cdsrail Limited | Condition monitoring apparatus for track circuits and method |
EP3133449A1 (de) * | 2014-05-14 | 2017-02-22 | Huawei Technologies Co., Ltd | Überwachungsschaltung und elektronische vorrichtung |
EP3133449A4 (de) * | 2014-05-14 | 2017-05-17 | Huawei Technologies Co., Ltd. | Überwachungsschaltung und elektronische vorrichtung |
US10135238B2 (en) | 2014-05-14 | 2018-11-20 | Huawei Technologies Co., Ltd. | Monitoring circuit and electronic device |
CN109131437A (zh) * | 2018-08-23 | 2019-01-04 | 深圳科安达电子科技股份有限公司 | 计轴轨道电路系统 |
CN109131437B (zh) * | 2018-08-23 | 2020-12-22 | 深圳科安达电子科技股份有限公司 | 计轴轨道电路系统 |
Also Published As
Publication number | Publication date |
---|---|
ATA87098A (de) | 2000-02-15 |
AT406856B (de) | 2000-10-25 |
EP0958985A3 (de) | 2002-05-22 |
EP0958985B1 (de) | 2005-11-30 |
DE59912851D1 (de) | 2006-01-05 |
ATE311320T1 (de) | 2005-12-15 |
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