WO1994001845A1 - Agencement pour la suppression de signaux parasites sur des lignes de signalisation - Google Patents

Agencement pour la suppression de signaux parasites sur des lignes de signalisation Download PDF

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Publication number
WO1994001845A1
WO1994001845A1 PCT/DE1993/000547 DE9300547W WO9401845A1 WO 1994001845 A1 WO1994001845 A1 WO 1994001845A1 DE 9300547 W DE9300547 W DE 9300547W WO 9401845 A1 WO9401845 A1 WO 9401845A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
gate
arrangement
lines
signals
Prior art date
Application number
PCT/DE1993/000547
Other languages
German (de)
English (en)
Inventor
Stefan Simon
Holger Krebs
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1994001845A1 publication Critical patent/WO1994001845A1/fr

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements

Definitions

  • the invention is based on an arrangement for masking out interference signals on signal lines. It is already known to shield signal lines, for example the signal line from a sensor to the evaluation unit, in order to protect them from interference and thus falsification of the signal. Shielding a sensor cable is relatively expensive, but it does not guarantee that the signal is not falsified.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage over the fact that a useful signal which is completely free from interference is present in the evaluation unit. There is no need for expensive shielding of the sensor cable. Another advantage is that only one additional wire in the sensor cable is required for signal transmission.
  • FIG. 1 shows a basic circuit diagram for digital signal transmission
  • FIG. 2 shows the signal profiles as they occur at different points in the basic circuit diagram
  • FIG. 3 shows a basic circuit diagram for analog signal transmission.
  • FIG. 1 shows the basic structure of the invention.
  • the circuit diagram shows a sensor unit 1, the sensor itself not being shown.
  • the signal supplied by the sensor is given in the sensor unit 1 to a first signal line 2, which thus transmits the original signal A.
  • this original signal is passed to an inverter 3, so that the inverted signal A is present on a second signal line 4 at the output of the inverter.
  • These two signal lines 2 and 4 can lie, for example, with a ground line 5 in the sensor cable 6, which is only shown schematically. A simple three-core cable without shielding would be necessary.
  • the sensor cable 6 is connected to the signal lines 2 and 4 and the ground line 5 to an evaluation unit 7.
  • the signal lines are each connected to ground on the anode side via a Zener diode 8 and 9, in order to derive overvoltages and to protect the evaluation unit from destruction.
  • the signal line 2 and the signal line 4 are first routed to a first digitizing stage 10 and a second digitizing stage 11 in order to obtain clear levels for further evaluation.
  • the original signal AI is present at the output of the first digitizing stage 10.
  • the digitized inverted signal AI is present after the transmission.
  • This inverted signal AI is now passed to a further inverter 12, where it is inverted one more time, so that the double-inverted signal AI is now present.
  • the transmitted original signal AI and the double-inverted transmitted signal AI are each routed to an input of an AND gate 13, so that the interference-free useful signal A2 is available at the output 14 for evaluation.
  • FIG. 2 shows the individual signal profiles at different points in the basic structure from FIG. 1.
  • the mode of action will now be explained in more detail with reference to FIG. 2.
  • the original signal A and the inverted signal A as is available at the output of the sensor unit 1, are represented by the signal course I.
  • the signal lines 2 and 4 for the transmission of these two signals are influenced approximately equally in the environment to which they are exposed, that is to say, occurring faults S as symbolically shown in FIG. 1 have an effect on the signal profiles on both signal lines 2, 4 approximately the same effect.
  • the disturbances are shown in FIG. 2 in the signal profiles II.
  • These signal profiles are available at both inputs of the evaluation unit 7.
  • these signals are first digitized in the digitizing stages 10 and 11, so that the signal curves III are available at the output of the digitizing stages.
  • the inverted signal is now inverted again in the inverter 12, so that the signal profiles as shown in the signal profile IV are available in front of the AND gate 13. Now the two signal profiles are linked by the AND gate 13 and faults are thus recognized and extinguished.
  • the original signal on the other hand, is confirmed and is thus available for evaluation as interference-free signal A2, as shown in signal curve V.
  • FIG. 3 shows such an arrangement for canceling out interference signals for the transmission and evaluation of analog signals, the same reference numerals being used for the same parts from FIG.
  • the original signal A supplied by a sensor unit is first given for transmission to a signal line 2.
  • the original signal A is passed parallel to the signal line 2 to a differentiator 15, so that a differentiated signal dA is given to the signal line 4 at the output of the differentiator 15.
  • the signal transmission also takes place here in a three-wire sensor cable, so that interference S influences the original signal A and the differentiated signal dA equally.
  • the original signal A is given in the evaluation unit 7 to the first input of an analog AND link 17 and the differentiated signal dA via an integrator 16 to the second input of the analog AND link 17, so that interference signals at the AND Link 17 can be hidden. After the AND link 17, the original signal A is available without interference.

Abstract

La présente invention propose une disposition pour la suppression de signaux parasites sur lignes de signalisation qui assure l'existence d'un signal original exempt de parasites pour l'exploitation. Cet agencement assure la transmission d'un signal original (A) dans une première ligne de signalisation (2) et d'un signal original inversé ou différentié (A ou dA) dans une seconde ligne de signalisation (4). Le signal auparavant inversé ou différencié doit ensuite être à nouveau inversé ou intégré à la fin des lignes de signalisation, et les deux signaux doivent être combinés dans une grille ET (13), le signal original sans parasites (A) étant alors disponible à la sortie de la grille ET.
PCT/DE1993/000547 1992-07-09 1993-06-24 Agencement pour la suppression de signaux parasites sur des lignes de signalisation WO1994001845A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4222475.6 1992-07-09
DE19924222475 DE4222475A1 (de) 1992-07-09 1992-07-09 Anordnung zum Ausblenden von Störsignalen auf Signalleitungen

Publications (1)

Publication Number Publication Date
WO1994001845A1 true WO1994001845A1 (fr) 1994-01-20

Family

ID=6462784

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1993/000547 WO1994001845A1 (fr) 1992-07-09 1993-06-24 Agencement pour la suppression de signaux parasites sur des lignes de signalisation

Country Status (2)

Country Link
DE (1) DE4222475A1 (fr)
WO (1) WO1994001845A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014166690A1 (fr) * 2013-04-11 2014-10-16 Robert Bosch Gmbh Procédé permettant de faire fonctionner un système à rampe commune d'un véhicule automobile présentant un système redondant de détection de la pression de rampe

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4435783A1 (de) * 1994-10-06 1996-04-11 Siemens Ag Schnittstellenschaltung zur potentialentkoppelten Signalübertragung innerhalb eines elektrischen Geräts
DE19508303A1 (de) * 1995-03-09 1996-09-12 Bayerische Motoren Werke Ag Signalübertragungsvorrichtung für Kraftfahrzeuge
DE19611503C1 (de) * 1996-03-23 1997-05-07 Bosch Gmbh Robert Einrichtung in einem Kraftfahrzeug zur Übertragung von mit Hilfe eines Sensors erzeugten Signalen
DE19654329A1 (de) * 1996-12-24 1998-06-25 Bosch Gmbh Robert Schaltungsanordnung zur störungsfreien Auswertung von Signalen
DE19962233B4 (de) * 1999-12-22 2006-02-02 Siemens Ag Telekommunikationseinrichtung mit nicht-invertierter und invertierter Signalverteilung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2010482A1 (fr) * 1968-05-25 1970-02-20 Philips Nv
US3748497A (en) * 1971-09-03 1973-07-24 Westinghouse Electric Corp Transfer gate
US3906384A (en) * 1973-02-12 1975-09-16 Cambridge Res & Dev Group System for nullifying signal processor distortions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2010482A1 (fr) * 1968-05-25 1970-02-20 Philips Nv
US3748497A (en) * 1971-09-03 1973-07-24 Westinghouse Electric Corp Transfer gate
US3906384A (en) * 1973-02-12 1975-09-16 Cambridge Res & Dev Group System for nullifying signal processor distortions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014166690A1 (fr) * 2013-04-11 2014-10-16 Robert Bosch Gmbh Procédé permettant de faire fonctionner un système à rampe commune d'un véhicule automobile présentant un système redondant de détection de la pression de rampe
US9863358B2 (en) 2013-04-11 2018-01-09 Robert Bosch Gmbh Method for operating a common-rail system of a motor vehicle having a redundant common-rail-pressure sensor

Also Published As

Publication number Publication date
DE4222475A1 (de) 1994-01-13

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