EP0091546A2 - Procédé et dispositif pour la transmission optique de signaux électriques à valeurs de tension positives et négatives - Google Patents

Procédé et dispositif pour la transmission optique de signaux électriques à valeurs de tension positives et négatives Download PDF

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Publication number
EP0091546A2
EP0091546A2 EP83101590A EP83101590A EP0091546A2 EP 0091546 A2 EP0091546 A2 EP 0091546A2 EP 83101590 A EP83101590 A EP 83101590A EP 83101590 A EP83101590 A EP 83101590A EP 0091546 A2 EP0091546 A2 EP 0091546A2
Authority
EP
European Patent Office
Prior art keywords
converter
input
output
signal
polarity
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
EP83101590A
Other languages
German (de)
English (en)
Other versions
EP0091546A3 (en
EP0091546B1 (fr
Inventor
Wilhelm Dr.-Ing. Ludolf
Rainer Dipl.-Ing. Schenkyr
Rolf-Dieter Dipl.-Ing. Sommer
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.)
Richard Hirschmann & Co Te Esslingen Bondsr GmbH
Original Assignee
Richard Hirschmann Radiotechnisches Werk
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Richard Hirschmann Radiotechnisches Werk filed Critical Richard Hirschmann Radiotechnisches Werk
Publication of EP0091546A2 publication Critical patent/EP0091546A2/fr
Publication of EP0091546A3 publication Critical patent/EP0091546A3/de
Application granted granted Critical
Publication of EP0091546B1 publication Critical patent/EP0091546B1/fr
Expired legal-status Critical Current

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Classifications

    • 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 invention relates to a method for the optical transmission of electrical signals with positive and negative voltage values, in which the input voltage changes are converted into frequency changes on the transmitter side by means of a V / f converter and these are changed after the signal transmission via an E / D converter, an optical waveguide and an O / E-converters on the receiver side can be converted back into voltage changes using an f / U converter.
  • Such methods are mainly used in control and regulation technology, as well as in measurement technology, preferably at signal frequencies below 1 kHz, in which high-precision transmission of voltages, in particular in an electromagnetically contaminated environment, is required.
  • the principle of the U / f or f / U conversion is preferably used because an exact match of the output and input voltage values in direct analog transmission with light power proportional to the voltage is not at all and in other also known devices (A / D- Converter) can only be achieved with higher component expenditure.
  • Such a zero point shift can, for example in the case of a machine control, cause the machine to run whether there is no input voltage.
  • a further disadvantage of this known transmission device is that the modulation frequency range available for transmission is divided into positive and negative voltages, ie can only be used to the corresponding part and thus a low resolution ⁇ f / ⁇ u causes. A higher resolution would only be possible by increasing the frequency range, which usually requires additional circuitry.
  • the invention has for its object to provide a transmission method of the type mentioned, in which the zero point stability is ensured with little effort and the highest possible resolution is achieved.
  • both the transmitter and the receiver provide a separation of the respective electrical input voltage according to magnitude and polarity and the polarity information is added to the output signal of the U / f or f / U converter controlled by the respective magnitude signal is.
  • the 0 volt input voltage is the 0 hertz modulation frequency and this is in turn assigned the 0 volt output voltage.
  • the available erfindungsgemäBen M is odulationsfrequenz Scheme no longer distributed between positive and negative voltages, either the sodaB Aufanssgenauig - substantially increased or speed for the same cost, this expense is reduced at the same resolution.
  • Subclaims 2 and 4 each describe a low-cost circuit for the transmitter and receiver side to carry out the method according to the invention.
  • An embodiment of the transmitter-side circuit according to claim 3 offers the advantage that the change in the polarization signal is delayed until the onset of the next pulse of the magnitude signal, and thus a pulse which otherwise distorts the message at the point of the polarization change is avoided in the receiver.
  • the circuit is therefore also suitable for use in highly sensitive transmission systems.
  • FIG. 2 a shows the transmitter side and FIG. 3 a being the receiver side.
  • FIG. 2 b shows the structure of the delay element designated V in FIG. 2 a and
  • FIG. 3 b shows the structure of the isolating circuit labeled T in FIG. 3 a in detail.
  • FIG. 4 shows the course of the essential voltages designated in FIGS. 2 and 3 in a pulse diagram.
  • the analog signal of the voltage U E present at the input E is fed on the one hand to a comparator 1 which supplies a positive or negative control voltage U PS as polarity information in accordance with the positive and negative U E values and on the other hand to a full-wave rectifier 2, which forms the amount of the input voltage U E.
  • a comparator 1 which supplies a positive or negative control voltage U PS as polarity information in accordance with the positive and negative U E values and on the other hand to a full-wave rectifier 2, which forms the amount of the input voltage U E.
  • This is used to control a U / f converter 3 converting voltages into frequencies, the output signal of which is converted into a corresponding sequence of square-wave pulses by means of a pulse shaper 4.
  • This signal U BS is linked to the polarity signal U PS delayed by a delay element 5 up to the negative edge of the next following U BS voltage pulse in an exclusive-OR element 6.
  • the delay element 5 consists of an edge-triggered JK master-slave flip-flop 7 clocked by the pulse shaper 4, in which one input (for example J) is directly connected and the other (for example K) is connected to the output of the comparator 1 via an inverter 8 . It advantageously prevents the occurrence of an additional pulse falsifying the message when the polarization changes in the receiver.
  • the output signal U s of the exclusive-OR gate 6 is transmitted to the receiver by means of an E / 0 converter 9 converting the electrical into optical signals, an optical waveguide 10 and an O / E converter 11 converting the optical into electrical signals, there, in a separating circuit 12, again separated into a polarity signal U PE and a magnitude signal U BE and, after conversion of the digital magnitude signal into an analog signal, combined and opened in an operational amplifier 14 with a controllable gain factor ⁇ 1 in an operational amplifier 14 led the exit A.
  • the signal U s is sampled after the pulses of constant width t p arriving at the distance T (sampling pulses U CP ). The logic level at these times is stored in a D flip-flop 15 until the next sampling pulse arrives.
  • the signal at the output Q of the D flip-flop 15 represents the polarity signal U PE Input signal U s and the polarity signal U PE available at the output Q of the D flip-flop 15, when linked in an exclusive-OR gate 16, form the trigger signal U EE of a monostable multivibrator 17. This generates pulses of the duration t M > t p at a distance T.
  • the output signal U BE of the monostable multivibrator 17 is supplied on the one hand to the subsequent f / U converter 13; on the other hand, together with the inverted output signal U BE delayed by the time ⁇ in a delay circuit 18, the above-mentioned sampling pulses U CP are obtained via a NOR gate 19 and serve as clock pulses of the duration ⁇ of the D flip-flop 15.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Communication System (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
EP19830101590 1982-04-10 1983-02-19 Procédé et dispositif pour la transmission optique de signaux électriques à valeurs de tension positives et négatives Expired EP0091546B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3213365 1982-04-10
DE19823213365 DE3213365A1 (de) 1982-04-10 1982-04-10 Verfahren und einrichtung zur optischen uebertragung elektrischer signale mit positiven und negativen spannungswerten

Publications (3)

Publication Number Publication Date
EP0091546A2 true EP0091546A2 (fr) 1983-10-19
EP0091546A3 EP0091546A3 (en) 1985-05-15
EP0091546B1 EP0091546B1 (fr) 1987-05-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830101590 Expired EP0091546B1 (fr) 1982-04-10 1983-02-19 Procédé et dispositif pour la transmission optique de signaux électriques à valeurs de tension positives et négatives

Country Status (2)

Country Link
EP (1) EP0091546B1 (fr)
DE (1) DE3213365A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161936A (en) * 1984-06-20 1986-01-22 Secr Defence Alternating current potential drop crack detection
KR100763671B1 (ko) * 2000-07-25 2007-10-04 소니 가부시끼 가이샤 기록/재생 장치 및 편집 방법
KR100865859B1 (ko) * 2000-08-28 2008-10-29 코닌클리케 필립스 일렉트로닉스 엔.브이. 오버뷰 재생 모드를 갖는 재생 장치 및 방법

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937572A1 (de) * 1989-11-11 1991-05-16 Hartmann & Laemmle Elektronisc Einrichtung zur uebertragung mindestens zweier als impulsfolgen erzeugter informationssignale

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916618A (en) * 1957-05-16 1959-12-08 Itt Pulse detector responsive to both pulse amplitude and duty cycle
US3278898A (en) * 1962-12-31 1966-10-11 Ibm Data transmission system for distinctively modulating given datum bits for parity checking
DE2351481C3 (de) * 1973-10-13 1980-07-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Femsteuerverfahren
DE2745770A1 (de) * 1977-10-12 1979-04-26 Bbc Brown Boveri & Cie Verfahren zum beruehrungslosen uebertragen von signalen
JPS5460509A (en) * 1977-10-22 1979-05-16 Fuji Electric Co Ltd Digtal transmission device for analog quantity
US4176248A (en) * 1977-12-23 1979-11-27 Bell Telephone Laboratories, Incorporated System for identifying and correcting the polarity of a data signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161936A (en) * 1984-06-20 1986-01-22 Secr Defence Alternating current potential drop crack detection
KR100763671B1 (ko) * 2000-07-25 2007-10-04 소니 가부시끼 가이샤 기록/재생 장치 및 편집 방법
KR100865859B1 (ko) * 2000-08-28 2008-10-29 코닌클리케 필립스 일렉트로닉스 엔.브이. 오버뷰 재생 모드를 갖는 재생 장치 및 방법

Also Published As

Publication number Publication date
DE3213365A1 (de) 1983-10-20
EP0091546A3 (en) 1985-05-15
EP0091546B1 (fr) 1987-05-20

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