EP0509920B1 - Positionsmeldevorrichtung eines beweglichen Gliedes - Google Patents

Positionsmeldevorrichtung eines beweglichen Gliedes Download PDF

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Publication number
EP0509920B1
EP0509920B1 EP92401059A EP92401059A EP0509920B1 EP 0509920 B1 EP0509920 B1 EP 0509920B1 EP 92401059 A EP92401059 A EP 92401059A EP 92401059 A EP92401059 A EP 92401059A EP 0509920 B1 EP0509920 B1 EP 0509920B1
Authority
EP
European Patent Office
Prior art keywords
circuit
pulses
input
inverter
output
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
Application number
EP92401059A
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English (en)
French (fr)
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EP0509920A1 (de
Inventor
Gérard Ebersohl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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Filing date
Publication date
Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0509920A1 publication Critical patent/EP0509920A1/de
Application granted granted Critical
Publication of EP0509920B1 publication Critical patent/EP0509920B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres

Definitions

  • the present invention as defined in the claims relates to a device to signal the position of a movable member.
  • the example relates to the signaling of the position of the contacts of a power cut-off device electrical, such as a circuit breaker. It is essential to the operator of a substation with devices such as circuit breakers, to know with certainty the state, open or closed, of the position of contacts of each of the circuit breakers; this information, generally available at each of the circuit breakers, is centralized in a control station and control; it is imperative that any failure of the information transmission circuit which connects each of the audit devices are immediately reported, without what the signal received at the station can make believe that a device is in a given state while it is in the reverse state; this error can cause unfortunate consequences for the network operator electric.
  • the problem is not limited to the detection of the position of the contacts of a circuit breaker; in electrical substations, this signaling, called also signal contact, relates to pressure switches, oil pressure of the hydraulic control circuits, oil levels, etc.
  • An object of the invention is therefore to produce a device for signaling the status of a device by detecting this state and transmitting the corresponding information, which is of a functioning without possible error on the detected state, and which signals immediately his own failure as well as that of the information transmission line.
  • Another object of the invention is to provide a device insensitive to external influences such as electric fields or magnetic fields as well than common mode disturbances encountered when uses galvanic connections.
  • Another object of the invention is therefore to make a device that does not require operating no more energy than that available by means of a photovoltaic cell.
  • U.S. Patent No. 4,626,621 it is describes a circuit for determining the position of an object, comprising two LR circuits attacked by a square signal from a pulse generator.
  • One of the LR circuits has a fixed inductor, the other a inductor variable depending on the position of the object.
  • the establishment of voltages in the circuits is done, from a moment t1, according to different exponential laws in two circuits, and we measure the respective times t2 and t3 corresponding to the establishment on the two circuits of a voltage of given value Vo.
  • the report (t3 - t1) / (t2 - t1) provides a value corresponding to the position sought.
  • Such a circuit is complex since it includes two LR circuits, two operational amplifiers, two counters, etc., and it cannot detect its own failures.
  • An object of the invention is to provide a circuit with the minimum of components, and, as it already has been indicated, able to report its own failures.
  • Document EP-A-0 272 750 teaches means for converting electrical pulses into optical pulses and means such as an optical fiber for transmitting these pulses to a processing center.
  • said first means comprises a circuit for developing rectangular pulses of constant and separate duration by equal time intervals, an integrating circuit receiving said pulses, a first inverter circuit with threshold receiving the output signals from the integrator and providing as output calibrated pulses, a circuit with time constant comprising a resistance and said inductance, the output signal of said first circuit threshold inverter being sent both to the input of said time constant circuit and on a second inverter circuit, the circuit output signals to time constant and the second inverter circuit being addressed to the input of a third inverter circuit to threshold whose output is connected to an amplifier feeding said second means.
  • said second means is a photo-diode.
  • Said processing center includes a circuit for demodulation and a self-monitoring circuit.
  • said demodulation circuit includes a converter photovoltaic receiving signal from said fiber optics, a Schmitt trigger and a type circuit MEMORY D.
  • the self-monitoring circuit includes a diode pump type circuit, supplying a output transistor.
  • the circuit self-monitoring includes an OR-type circuit exclusive inserted by a first entry upstream of said MEMORY D circuit and including a second connected input to a microcontroller that can provide on this second input a test pulse of duration dt greater than the duration of said rectangular pulses, the microcontroller being connected to the MEMORY D circuit and being scheduled to observe a change in information from position during said period when the system is at rest.
  • reference 1 designates a photovoltaic element, powered by a source luminous 2, for example a lamp powered by a battery 3.
  • the photovoltaic element is placed in a shielded enclosure 4, the light passing through a window 4A; the photovoltaic element supplied by a voltage Vcc for example 5 volts and capable of delivering 20 mA in Crete; an electronic circuit 5, placed inside the shielded enclosure and powered by element 4, develops signals representative of the state of the device;
  • the circuit includes an inductor 6 made up a winding 6A and a movable core 6B linked to the element mobile of the device which one wishes to know the position; inductance 6 takes two different values depending on whether the core 6B is inside or outside of the winding 6A, and takes values evolving in proportion to the penetration of the nucleus between the two values mentioned above.
  • the electrical output signal from circuit 5 is converted into a light signal by a component optoelectronics 8 and routed through an optical fiber 9 up to signal processing station 10.
  • a optoelectronic component 11 ensures the conversion of the light signal into electrical signal which is received by a electronic processing circuit 12 supplying by example signaling 13 and alarm 14.
  • the DC voltage is developed using a 1A integrated photovoltaic cell placed at inside the shielded enclosure (this cell is by example an ASGA cell marketed by the company SPECTEC), connected by a 4B optical fiber crossing the shielded cell wall supplied by a diode laser 3A.
  • circuit 5 includes a Schmitt trigger 20 receiving the voltage Vcc, and comprising a component 21, an adjustable resistance 22 and a capacitor 23; this trigger outputs A rectangular pulses with rising edges distant for example 100 microseconds and whose duration is for example 40 microseconds. (see figure 3 A).
  • circuit integrator 30 which includes a capacitor 31, a resistor 32 and a diode 33 to attenuate strongly the peaks due to the falling fronts of pulses ( Figure 3B).
  • the integrator is followed by a reversing element 40 at threshold s1 which supplies, at output C, pulses of calibrated length, for example 10 microseconds (figure 3C).
  • the signal is sent on a time constant circuit comprising the variable inductance 6, of value denoted L, and an adjustable resistance of value R3.
  • the 3D curve shows, on its left side, the shape of the output signal of the LR3 circuit, at point D, when the inductance at a high value (core 6B inside the winding 6A); the 3D curve shows, on its right side, the shape of the signal in D when the inductance at a low value (core outside the winding).
  • the output signal of the reversing element is inverted by an inverter circuit 50 and the output signal in F (diagram 3F) is addressed, at the same time as the signal at D, to a threshold inverting circuit 60, the threshold s2 is shown in Figure 3D.
  • pulses are obtained of short duration (3 microseconds for example) when the inductance L is weak (nucleus released) and longer lasting (greater than 5 and less at 10 microseconds for example) when the L value is high (retracted core); these impulses are shown respectively to the left and to the right of the 3G diagram.
  • the relation A makes it possible to show that if the trigger threshold is constant, the width of impulses is directly proportional to L / R3, therefore to L, since R3 is substantially constant.
  • the pulses at the output of circuit 60 are addressed to a transistor 61 supplying, through a resistor 62, a diodeemissive 63, for example type TI510 from the company Hewlett Packard, connected to a optical fiber 64 which crosses the shield 4 and routes information, in the form of light pulses, to a treatment center.
  • a diodeemissive 63 for example type TI510 from the company Hewlett Packard
  • the capacitor Cc in parallel on the resistance R3, used to compensate for the internal capacity of the winding.
  • the device of the invention for making contacts so that we will only need two inductance values to determine two widths impulse.
  • the inductance a winding with a ferromagnetic core, for example mumetal in the form of a tongue; the two values induction will be determined by the fact that the nucleus ferromagnetic will be in the winding or completely in outside the winding. It is understood that this application is not limiting and that we could consider using more than two inductance values, with intermediate positions of the core ferromagnetic and thus determine more than two durations impulse.
  • Figure 4 is a diagram of the control circuit the position of the signal contact and the circuit self-monitoring operation.
  • optical signals emitted by the converter 63 of Figure 3 are routed through an optical fiber 64 and transformed into electrical signals using a opto-electronic converter 65, for example a circuit R2501 from the company Hewlett Packard.
  • the converter output signals (H point of Figure 4), are represented in the 5H diagram of the FIG. 5, in which two pulses of small width to the left of the diagram and two pulses of large width to the right of the diagram.
  • circuit inverter 66 The pulses are reversed by a circuit inverter 66; the output signal of circuit 66 (point J in Figure 4), is shown in diagram 5J of the figure 5.
  • the signal at J is sent to a trigger Schmitt (for example a circuit 4093 from the company Radio Corporation of America, symbolized in Figure 5 by a resistor r and a capacitor c; the output signal of the Schmitt trigger, at point K in Figure 4, is shown in diagram 5K of figure 5.
  • a trigger Schmitt for example a circuit 4093 from the company Radio Corporation of America, symbolized in Figure 5 by a resistor r and a capacitor c; the output signal of the Schmitt trigger, at point K in Figure 4, is shown in diagram 5K of figure 5.
  • the signal in K is sent to an inverter circuit with thresholds 67, which can take a Vcc value as output or a value 0; the signal switches from Vcc to 0 when the input signal exceeds a first threshold s3 and switches from 0 to Vcc when the signal crosses a second threshold s4 (s3> s4).
  • the output signal (in M) of circuit 67 is shown in diagram 5M of figure 5.
  • the signal at M is sent to the 'DATA "input of a circuit 68 known as "MEMORY D” (for example a circuit 4013 of Control Data), whose entry “CLOCK” is connected to point M.
  • MEMORY D for example a circuit 4013 of Control Data
  • This circuit provides on its output Q, at each 0-1 transition from signal to M, a signal corresponding to the state of the "DATA" input.
  • the signal correspondent in the example chosen, is represented in diagram 5Q of figure 5.
  • the diagram in Figure 5N shows the potential on the gate of the transistor, in N, which always remains greater than or equal to Vcc as long as the chain opto-electronics works; the transistor then remains blocked.
  • Figure 6 illustrates an alternative embodiment of the self-monitoring circuit.
  • a circuit 90 of the exclusive OR type, comprising two inputs E1 and E2 and an output S, is inserted by sound input E1 between the threshold inverter circuit 67 and the MEMORY circuit D 68.
  • An mP microcontroller connected to the Q * output of the circuit 68 to acquire this information, is capable send a duration pulse "1" on input E2 dt> to.
  • This impulse corresponds to the start-up of self-monitoring and is referred to below as test pulse.
  • Self-monitoring can be periodic, with a own periodicity, or be part of the normal cycle of capture of information which is operated by sampling with a given frequency.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Selective Calling Equipment (AREA)
  • Pens And Brushes (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Alarm Systems (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Optical Communication System (AREA)
  • Push-Button Switches (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Electronic Switches (AREA)
  • Locating Faults (AREA)
  • Near-Field Transmission Systems (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Vehicle Body Suspensions (AREA)
  • Seats For Vehicles (AREA)
  • Control And Safety Of Cranes (AREA)

Claims (8)

  1. Vorrichtung zum Melden des Zustandes eines Gerätes, das mehrere verschiedene Zustände annehmen kann, und zum Übertragen der entsprechenden Information, wobei die Vorrichtung umfaßt:
    im Inneren eines abgeschirmten Raumes (4) Mittel zum Ausarbeiten einer störungsfreien Gleichspannung, wobei der abgeschirmte Raum in seinem Inneren aufweist:
    ein erstes Mittel (5) zum Ausarbeiten, von der Gleichspannung aus, von elektrischen Impulsen mit einer Dauer, die zum Wert einer Induktanz (6) proportional ist, wobei diese Induktanz gemäß den verschiedenen Zuständen des Geräts verschiedene Werte annehmen kann,
    ein zweites Mittel (8) zum Umwandeln der elektrischen Impulse in optische Impulse und eine Lichtleitfaser (9) zum Übertragen dieser Impulse außerhalb des Raumes zu einem Verarbeitungszentrum (10) hin,
    dadurch gekennzeichnet, daß die Mittel zum Ausarbeiten einer Gleichspannung ein photovoltaïsches Element (1) umfassen, das im Inneren des abgeschirmten Raumes (4) angeordnet ist und durch ein Fenster dieses von einer Lichtquelle (2) beleuchtet wird.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zum Ausarbeiten einer Gleichspannung eine integrierte Photozelle (1A) umfassen, die im Inneren des abgeschirmten Raumes (4) angeordnet ist mit einer Lichtleitfaser (4B) verbunden ist, die von einer Laserdiode (3A) versorgt wird.
  3. Vorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, daß das erste Mittel (5) eine Schaltung (20) zum Ausarbeiten von Rechteckimpulsen mit konstanter Dauer und durch gleiche Zeitintervalle getrennt, eine Integratorschaltung (30), die die Impulse empfängt, eine erste Umkehrschaltung (40) mit Schwelle, die die Ausgangssignale des Integrators empfängt und am Ausgang kalibrierte Impulse bereitstellt, eine Schaltung mit Zeitkonstante umfaßt, die einen Widerstand (R3) und die Induktanz (L) umfaßt, wobei das Ausgangssignal der ersten Umkehrschaltung (40) mit Schwelle zugleich an den Eingang der Schaltung mit Zeitkonstante und an eine zweite Umkehrschaltung (50) gesandt wird, wobei die Ausgangssignale der Schaltung mit Zeitkonstante und der zweiten Umkehrschaltung (50) an den Eingang einer dritten Umkehrschaltung (60) mit Schwelle adressiert sind, deren Ausgang mit einem Verstärker (61) verbunden ist, der das zweite Mittel (8) versorgt.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das zweite Mittel (8) eine Photodiode (63) ist.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Verarbeitungszentrum (10) eine Demodulationsschaltung und eine Selbstüberwachungsschaltung umfaßt.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Demodulationsschaltung einen photovoltaischen Wandler (65), der das Signal der Lichtleitfaser (64) empfängt, einen Schmitt-Trigger (r, c, 67) und eine Schaltung vom Typ SPEICHER D (68) umfaßt.
  7. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Selbstüberwachungsschaltung eine Schaltung vom Diodenpumpentyp umfaßt, die einen Ausgangstransistor (T) versorgt.
  8. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Selbstüberwachungsschaltung eine Schaltung (90) vom Typ exklusives ODER umfaßt, die mit einem ersten Eingang (E1) stromaufwärts der Schaltung SPEICHER D (68) eingefügt ist und einen zweiten Eingang (E2) umfaßt, der mit einer Mikrosteuerung (mP) verbunden ist, die an diesem zweiten Eingang einen Prüfimpuls mit der Dauer dt bereitstellen kann, die größer als die Dauer der Rechteckimpulse ist, wobei die Mikrosteuerung mit der Schaltung SPEICHER D (68) verbunden und zum Feststellen einer Änderung der Positionsinformation Q* während der Dauer programmiert ist, wenn sich das System in Ruhe befindet.
EP92401059A 1991-04-16 1992-04-15 Positionsmeldevorrichtung eines beweglichen Gliedes Expired - Lifetime EP0509920B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9104631 1991-04-16
FR9104631A FR2675609B1 (fr) 1991-04-16 1991-04-16 Dispositif de signalisation de la position d'un organe mobile.

Publications (2)

Publication Number Publication Date
EP0509920A1 EP0509920A1 (de) 1992-10-21
EP0509920B1 true EP0509920B1 (de) 1998-09-02

Family

ID=9411882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92401059A Expired - Lifetime EP0509920B1 (de) 1991-04-16 1992-04-15 Positionsmeldevorrichtung eines beweglichen Gliedes

Country Status (11)

Country Link
US (1) US5331319A (de)
EP (1) EP0509920B1 (de)
JP (1) JPH0716275B2 (de)
CN (1) CN1028807C (de)
AT (1) ATE170652T1 (de)
BR (1) BR9201411A (de)
CA (1) CA2066109C (de)
DE (1) DE69226803T2 (de)
DK (1) DK0509920T3 (de)
ES (1) ES2121832T3 (de)
FR (1) FR2675609B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2273840A (en) * 1992-12-09 1994-06-29 Sony Corp Optically transmitting signals between measurement devices
ES2117939B1 (es) * 1996-01-24 1999-03-16 Univ Madrid Politecnica Sistema sensor autoalimentado fotovoltaicamente e integrado para telemedida de parametros fisicos y quimicos a traves de canales opticos.
US5880681A (en) * 1997-09-16 1999-03-09 Caterpillar Inc. Apparatus for determining the position of a work implement
JPH11122177A (ja) * 1997-10-17 1999-04-30 Fujitsu Ltd 監視制御信号送信装置及び方法
FR2938656B1 (fr) * 2008-11-18 2011-08-26 Thales Sa Systeme a securite intrinseque et module de test, notamment pour une utilisation dans un systeme de signalisation ferroviaire
CN117174511B (zh) * 2023-11-02 2024-03-01 西安西电电力系统有限公司 柔性直流输电功率模块旁路开关的状态光回报装置及方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984824A (en) * 1975-07-25 1976-10-05 The United States Of America As Represented By The Secretary Of The Army Wide-band optical analog signal link using fiber optics
US4359101A (en) * 1979-10-12 1982-11-16 Michel Gagnon Ground preparation tool for reforestation
FR2485774A1 (fr) * 1980-06-26 1981-12-31 Cuggia Christiane Detecteur de position d'un organe mobile notamment a des fins de protection
US4490606A (en) * 1982-04-26 1984-12-25 Geosource Inc. Transducer apparatus utilizing fiber optics for data transmission
DE3219877A1 (de) * 1982-05-27 1983-12-01 kabelmetal electro GmbH, 3000 Hannover Schaltungsanordnung zur ueberwachung und anzeige der position eines geraets
US4626621A (en) * 1983-08-10 1986-12-02 Diesel Kiki Co., Ltd. Circuit for generating a position in digital form
GB2165712B (en) * 1984-10-17 1988-05-11 Stc Plc Power transmission
DE3506602A1 (de) * 1985-02-25 1986-08-28 Kraftwerk Union AG, 4330 Mülheim Einrichtung zur signaluebertragung
JPS62267898A (ja) * 1986-05-15 1987-11-20 オムロン株式会社 遠隔信号伝達装置
DE3643715A1 (de) * 1986-12-20 1988-06-30 Philips Patentverwaltung Anordnung zur uebertragung von messwerten eines sensors
US5229876A (en) * 1990-03-26 1993-07-20 At&T Bell Laboratories Telemetry for optical fiber amplifier repeater

Also Published As

Publication number Publication date
CA2066109C (fr) 1995-11-14
FR2675609B1 (fr) 1995-06-16
BR9201411A (pt) 1992-12-01
CN1028807C (zh) 1995-06-07
FR2675609A1 (fr) 1992-10-23
ES2121832T3 (es) 1998-12-16
DE69226803T2 (de) 1999-04-01
ATE170652T1 (de) 1998-09-15
JPH0716275B2 (ja) 1995-02-22
CN1065945A (zh) 1992-11-04
US5331319A (en) 1994-07-19
DK0509920T3 (da) 1999-02-08
EP0509920A1 (de) 1992-10-21
CA2066109A1 (fr) 1992-10-17
JPH05183965A (ja) 1993-07-23
DE69226803D1 (de) 1998-10-08

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