EP0341224A1 - Apparat zur Überwachung des Zustands eines fernkontrollierten Gerätes - Google Patents

Apparat zur Überwachung des Zustands eines fernkontrollierten Gerätes Download PDF

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Publication number
EP0341224A1
EP0341224A1 EP19890850088 EP89850088A EP0341224A1 EP 0341224 A1 EP0341224 A1 EP 0341224A1 EP 19890850088 EP19890850088 EP 19890850088 EP 89850088 A EP89850088 A EP 89850088A EP 0341224 A1 EP0341224 A1 EP 0341224A1
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EP
European Patent Office
Prior art keywords
voltage
current
encoding means
remotely controlled
controlled 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.)
Granted
Application number
EP19890850088
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English (en)
French (fr)
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EP0341224B1 (de
Inventor
Bengt Johan Sterner
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
    • B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously

Definitions

  • the invention relates to an apparatus for monitoring the state of a remotely controlled device, e.g. the points drive of railway points or a signal lamp along a railway.
  • the object of the present invention is to provide an apparatus of the kind mentioned above, with which the state of the remotely controlled device can be monitored without an erroneous monitoring result occuring, should the lines from a controll means be confused or connected to the wrong means.
  • This is achieved by the remotely controlled device being provided with one or more special encoding means, depending on the application. Each such means gives rise to a pulse pattern which is characteristic for precisely this means in a current passing through it. It can thus be decided at the control means whether a current through it also flows through a given conductor part at the remotely controlled device.
  • the remotely controlled device is a signal lamp, it is suitable to use a single encoding means, which is connected in series with the lamp and adjacent to it. The pulse pattern then occurs when the lamp is supplied with current.
  • FIG. 1 there is illustrated a first embodiment example of an apparatus in accordance with the invention.
  • the numeral 1 denotes a voltage source and the numeral 2 a special monitoring receiver, which are assumed to be situated in a railway signal box.
  • 3a and 3b respectively denote two switching elements and 4a and 4b two special encoding means, which are assumed to be situated in a switch drive (not illustrated in the Figure) to a railway switch or points.
  • the switching elements are conventionally disposed for being switched by the points drive.
  • the switch positions illustrated in the Figure are those taken up in one switch position of the points, one encoding means 4a being connected in series with the voltage source 1 and the monitoring receiver 2. In the other switch position of the points, the switching elements are reversed, and the second encoding means 4b is connected in series with the voltage source and the monitoring receiver.
  • Each of the encoding means 4a and 4b is disposed to give rise to a characteri­stic pulse pattern for the respective means in the current which flows through it when it is connected into a loop with a voltage source. This takes place by the impedance of the encoding means being changed with time in a characteri­stic way between two different values.
  • a single pulse pattern is formed irrespective of the polarity of the voltage source, and the pulse pattern is suitably repeated without interruption.
  • the monitoring receiver 2 in the signal box is disposed for detecting and separating different pulse patterns in a current flowing through it irrespective of the current direction.
  • the receiver can thus comprise a current sensing receiver of a known kind.
  • the encoding means By monitoring the received pulse pattern it can thus be decided which of the encoding means is connected into the loop. It can thus be also decided whether the points are in the right or left hand position. It does not matter whether both lines between the signal box and the points drive are mixed up and have changed places. Neither does the polarity of the voltage source make any difference. If the pulse pattern also contains information as to which of several different points it comes from, the risk of an erroneous monitoring result is also avoided should the lines have been erroneously connected to the wrong points.
  • the monitoring receiver 2 in this example suitably has four outputs, whereby left hand position, right hand position, incorrectly received pulse pattern and no received pulse pattern can be indicated.
  • An erroneous pulse pattern can mean that the lines are connected to another set of points than the one intended.
  • Receiving no pulse pattern can mean that the points drive is in an intermediate position, neither of the encoding means 4a and 4b having been connected.
  • FIG 2 there is illustrated a second embodiment example of an apparatus in accordance with the invention.
  • a voltage source is denoted by 1 and a monitoring receiver by 2, these being situated in a signal box.
  • the units to the right of the dashed parts of the lines are assumed in this case to be situated at a signal lamp 6 along a railway.
  • the lamp is illuminated by closing a switch 5 in the signal box.
  • Current through the lamp 6 also goes through an encoding means 4 connected in series with the lamp and of the same kind as the encoding means 4a and 4b as above.
  • each individual signal lamp is thus connected in series with an encoding means which gives rise to a pulse pattern which is characteristic for precisely this encoding means. It can thus be decided in each monitoring receiver whether the current supply connected by a given switch really passes through the signal lamp for which the switch is intended.
  • Erroneous signal formations caused by erroneously connected supply lines to the signal lamps are thus discovered by this apparatus without any special signal lines being utilised. Erroneous connections can depend on mixing up different line pairs, which can result in a "clear” signal instead of a "stop” signal. Of course, line ruptures or broken signal lamps are also discovered, since no pulse patter is received in such cases. Short-circuiting can also be discovered in certain circumstances.
  • the monitoring receiver 2 suitably has three outputs in this case, whereby correctly received pulse pattern, incorrectly received pulse pattern and no received pulse pattern can be indicated.
  • FIG. 3 there is illustrated a first embodiment example of the encoding means included in the apparatus described above.
  • the encoding means according to this example is intended for being fed with a DC voltage from the signal box, which means that the voltage source 1 mentioned above is a DC source.
  • the encoding means includes a Zener diode bridge 10 and an energy storage capacitor 11, the task of these being to provide an internal feed voltage.
  • the polarity of this voltage is independent of the polarity of the voltage source 1, according to the above, and of how the lines from the voltage source are connected.
  • the numeral 12 denotes a self-oscillating clock pulse generator, which generates pulses having a predetermined frequency.
  • the clock pulses are supplied to a clock pulse input CL on a parallel-to-serial converter 13.
  • a symbolically depicted, adjustable circuit 14 is connected to the parallel inputs of the converter, and desired pulse patterns can be set with the aid of this circuit, e.g. by strapping.
  • the pulses forming the pulse pattern are read out from the converter 13 in serial form and are supplied to an optocoupler comprising a light emitting diode 15 and a phototransistor 16.
  • the pulses from the optocoupler are inverted in a circuit comprising a resistor 17, a Zener diode 18 and a transistor 19.
  • This circuit is connected via a diode rectifier bridge 20 to the series circuit, which includes the encoding means.
  • the Zener voltage across the diode 18 is selected such that it is somewhat greater than the voltage across the phototransistor 16 when the transistor is fully on. The transistor 19 is therefore off when the phototransistor is on.
  • the current through the series circuit is thus determined by the resistance in it outside the encoding means, inter alia in the receiver, by the resistance of the resistor 17 and by the feed voltage reduced by the voltage drop across the phototransistor 16 and diode bridges 10 and 20.
  • the phototran­sistor is non-conducting when the transistor 19 is on.
  • the current through the series circuit is then determined by the resistance in it outside the encoding means, and by the feed voltage reduced by the voltage drop across the diode 18, transistor 19 and diode bridges 10 and 20.
  • the current can pass through the encoding means in both directions in response to the polarity of the voltage source and connection of the lines.
  • FIG 4 there is illustrated an example of a pulse pattern obtained with an encoding means according to Figure 3.
  • the encoding means is fed with a DC voltage and gives rise to a square wave-shaped current due to the impedance in the means changing with time.
  • An example of a binary pulse pattern has been indicated in the Figure.
  • FIG 5 there is illustrated a second embodiment example of an encoding means in accordance with the above.
  • the means in this case is intended to be fed by a pulsed voltage e.g. a square wave voltage.
  • the voltage source 1, mentioned above, is thus not a DC voltage source in this case.
  • the means differs from the one according to Figure 3 in that a differentiating circuit 25, 26, a diode 27 and a resistor 28 have been added.
  • the clock pulse generator is not self-oscillating but is controlled. This generator is now denoted 12′ instead of 12 and has an input S for synchronising pulses.
  • short pulses are formed by the differentiating circuit 25, 26, these pulses being supplied to the synchronising input S of the generator 12′.
  • Clock pulses are thus generated which are synchronous with the pulsed feed voltage, and which are supplied to the clock input CL on the parallel-to-serial converter 13.
  • the resistor 28 accelerates discharge of the blocking capacitance in the diode 27 and diode bridge 10, so that the synchronising pulses will be more distinct even if the synchronising input S is high-impedance.
  • the synchronisation is intended to facilitate detection of the pulse pattern in the receiver by enabling synchronous detection.
  • the feed voltage does not need to have pulse form, and it can have some other form varying uniformly with time, e.g. sinus form, from which synchronising pulses can be derived.
  • FIG 6 there is illustrated an example of a pulse pattern which is obtained with an encoding means according to Figure 5.
  • the feed voltage is assumed to be square wave-shaped, is denoted v and gives rise to a square wave-shaped current i .
  • the current assumes a higher value during certain voltage pulses and a lower value during the remaining voltage pulses, due to the encoding means impedance changing with time.
  • the same binary pulse pattern as in Figure 4 has also been indicated in this Figure.
  • Certain encoding means can give rise to pulse patterns corresponding to a considerably higher current average value than what is obtained with other encoding means.
  • signal lamps in order that these shall illuminate equally as strongly, it can therefore be suitable to adjust the feed voltage to each individual lamp, or components in each encoding means, according to the pulse pattern to which the respective encoding means gives rise.
  • FIG 7 there is illustrated a third embodiment of an encoding means in accordance with the above.
  • the Zener diode bridge 10 in the above-described encoding means has been dispensed with, and has been replaced by a single Zener diode 29 between the optocoupler 15, 16 and the diode bridge 20.
  • the differentiating circuit 25, 26 and the diode 27 have been drawn with dashed connection lines, which is intended to convey that they are a part of the encoding means in the case where the latter is intended for a feed voltage varying with time.
  • An advantage with this embodiment compared with the ones described above is that there is a saving in three Zener diodes.
  • the optocoupler 15, 16 described above and illustrated in Figures 3, 5 and 7 has the task of electrically insulating the parallel-to-serial converter 13 from the means 16-19.
  • the optocoupler can be eliminated if the converter 13 is given the same zero potential as the transistor 16. This can be achieved, at least in the case with DC current, by connecting an insulating DC voltage converter (DC/DC converter) into the current supply to the pulse generator 12 and converter 13. The series output of the converter 13 is then connected directly to the transistor 16, which becomes an ordinary transistor and not a phototransistor.
  • DC/DC converter insulating DC voltage converter
  • the adjustable ciruit 14 which is connected to the converter 13 can also be replaced by a ROM memory. In such a case a longer bit pattern can be obtained than with what is practically possible with strapping according to the above.
  • Conceivable fields of use for the apparatus in accordance with the invention other than for railway signaling are such as control of valve states, doors, freight room hatches and position limiting in different machines.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Selective Calling Equipment (AREA)
EP89850088A 1988-05-06 1989-03-16 Apparat zur Überwachung des Zustands eines fernkontrollierten Gerätes Expired - Lifetime EP0341224B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8801725A SE461084B (sv) 1988-05-06 1988-05-06 Anordning foer att kontrollera tillstaandet hos ett fjaerrstyrt organ e x v ett vaexeldriv till en jaernvaegsvaexel eller en signallampa vid ett jaernvaegsspaar
SE8801725 1988-05-06

Publications (2)

Publication Number Publication Date
EP0341224A1 true EP0341224A1 (de) 1989-11-08
EP0341224B1 EP0341224B1 (de) 1993-12-29

Family

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Application Number Title Priority Date Filing Date
EP89850088A Expired - Lifetime EP0341224B1 (de) 1988-05-06 1989-03-16 Apparat zur Überwachung des Zustands eines fernkontrollierten Gerätes

Country Status (4)

Country Link
EP (1) EP0341224B1 (de)
DE (1) DE68911744T2 (de)
DK (1) DK169209B1 (de)
SE (1) SE461084B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821141A1 (de) * 1998-05-12 1999-11-18 Alcatel Sa Vorrichtung zur Stromversorgung eines im Betrieb einer Weiche angeordneten elektrischen Verbrauchers und Diagnoseeinrichtung für eine Weiche

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356485A (en) * 1979-12-21 1982-10-26 Siemens Aktiengesellschaft Device for the signal-technical secure control and monitoring of electrical loads
US4376910A (en) * 1979-07-16 1983-03-15 Jeumont-Schneider Power supply and control device for the proper operation of a railway traffic light
DE3223779C2 (de) * 1982-06-23 1987-11-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4376910A (en) * 1979-07-16 1983-03-15 Jeumont-Schneider Power supply and control device for the proper operation of a railway traffic light
US4356485A (en) * 1979-12-21 1982-10-26 Siemens Aktiengesellschaft Device for the signal-technical secure control and monitoring of electrical loads
DE3223779C2 (de) * 1982-06-23 1987-11-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT No 84-317630/51, SU-1090 608 *
DERWENT'S ABSTRACT No. 84-087078/14, SU-1024 341 *
DERWENT'S ABSTRACT No. 86-244902/37, SU-1212 859 *
DERWENT'S ABSTRACT No. K1294B/43, SU-643 388 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821141A1 (de) * 1998-05-12 1999-11-18 Alcatel Sa Vorrichtung zur Stromversorgung eines im Betrieb einer Weiche angeordneten elektrischen Verbrauchers und Diagnoseeinrichtung für eine Weiche

Also Published As

Publication number Publication date
DE68911744D1 (de) 1994-02-10
DK221989A (da) 1989-11-07
DK169209B1 (da) 1994-09-12
SE8801725D0 (sv) 1988-05-06
SE8801725L (sv) 1989-11-07
DK221989D0 (da) 1989-05-05
SE461084B (sv) 1990-01-08
DE68911744T2 (de) 1994-07-07
EP0341224B1 (de) 1993-12-29

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