WO1992000504A1 - Dispositif pour la detection fiable de pannes et l'elimination des cretes de bruits parasites pendant une analyse potentiometrique - Google Patents

Dispositif pour la detection fiable de pannes et l'elimination des cretes de bruits parasites pendant une analyse potentiometrique Download PDF

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Publication number
WO1992000504A1
WO1992000504A1 PCT/DE1991/000473 DE9100473W WO9200504A1 WO 1992000504 A1 WO1992000504 A1 WO 1992000504A1 DE 9100473 W DE9100473 W DE 9100473W WO 9200504 A1 WO9200504 A1 WO 9200504A1
Authority
WO
WIPO (PCT)
Prior art keywords
potentiometer
resistor
filter
analog
digital converter
Prior art date
Application number
PCT/DE1991/000473
Other languages
German (de)
English (en)
Inventor
Helmut Denz
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 WO1992000504A1 publication Critical patent/WO1992000504A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/107—Safety-related aspects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
    • G01D5/165—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance by relative movement of a point of contact or actuation and a resistive track
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity

Definitions

  • the invention relates to a device for safe execution and noise peak suppression in a potentiometer evaluation, in particular in a throttle valve potentiometer in an internal combustion engine.
  • the throttle valve potentiometer represents a mechanically changeable resistor, from whose slider the signal voltage is tapped.
  • the tapped signal voltage should lie within narrow tolerances and the wiper currents should be as small as possible ( ⁇ 20 .uA) for the best noise suppression. Fault detection for short circuits and cable drop at the potentiometer connections is also required.
  • a monitoring device for the throttle valve potentiometer is known from DE-OS 37 14 697. The throttle valve potentiometer, the wiper position of which is in a predetermined relationship to the position of the accelerator pedal, is connected on the one hand to the operating voltage via a measuring resistor and on the other hand to ground.
  • the invention has for its object to provide a device with which, when evaluating output signals of a potentiometer arrangement, on the one hand a failure of the potentiometer or a cable break at the wiper connection of the potentiometer is recognized and on the other hand the effect of noise peaks on the output signal of the potentiometer arrangement errors can be suppressed as best as possible.
  • the device according to the invention has the advantage that a missing output signal of the potentiometer, or. A cable break at the grinder connection of the potentiometer is reliably detected in normal operation despite the low potentiometer current.
  • Noise peaks which can occur when the potentiometer path is abraded, can be better suppressed or prevented by an appropriate choice of a filter from having an effect on the analog-digital converter.
  • FIG. 1 shows a basic illustration of a conventional evaluation circuit for a ratiometrically evaluated throttle valve potentiometer
  • FIG. 2 shows a device according to the invention for reliable failure detection and noise peak suppression for a throttle valve potentiometer
  • a throttle valve potentiometer 10 is located in the throttle valve generator DKG between the buffered positive supply voltage U, which is 5 volts, and ground switched.
  • the grinder S of the throttle valve potentiometer 10 there is possibly a short-term noise resistance, which is shown as resistor 11.
  • a protective resistor 18, the value of which is approximately 800 ohms, is connected downstream of the wiper S, the other connection of the protective resistor 18 leading to the output A of the throttle valve generator DKG and connected to a corresponding connection of the control unit SG is.
  • control unit SG The relevant connection of the control unit SG is connected via a filter resistor 12 to an analog-digital converter 13 which is also between the supply voltage and ground. Between the input of the analog-digital converter 13 and ground is a filter capacitor 14, at the input of the control unit SG there is a pull-down resistor 15 which is connected to ground and is used for potential definition in the event of a cable drop.
  • a protective circuit which consists of the Zener diodes 23 and 24, is arranged at the input of the analog-digital converter 13 in such a way that it protects it from excessive positive or negative voltage peaks.
  • the analog-to-digital converter 13 is represented in FIG. 1 by an equivalent circuit which is formed from a resistor 16 and a voltage of 2.5 volts connected to terminal 17.
  • the throttle valve potentiometer voltage U lies between the wiper S of the throttle valve potentiometer 10 and ground, the current I flows as the output signal of the throttle valve potentiometer via the wiper contact S.
  • the voltage U is at the pull-down resistor 15 and the voltage U at the filter capacitor 14. Depending on the voltage U flows into the analog-digital converter 13
  • the throttle valve potentiometer 10 lies between the buffered supply voltage U and ground.
  • the potentiometer voltage U changes depending on the position of the throttle valve.
  • the characteristic curve is usually designed in such a way that U reaches a maximum of 4.8 volts and a minimum of 0.2 volts, so that there is an implausible range for various types of faults in line shorts or interruptions.
  • a filter time constant TT 5 ms is implemented with a resistor 12 _ 12 KOh and a capacitor 14 with 440 Nannofarad.
  • the current I must be chosen to be as small as possible so that the voltage drop is kept as small as possible becomes relatively large.
  • the total resistance of the two resistors 12 and 15 must be less than 33 KOhm, with a value of 12 KOhm for the resistor 12, resistor 15 must be less than 21 KOhm. In normal operation, however, this results in a high wiper current I of 220 ⁇ A when the wiper track is tapped at the top, which leads to sharp voltage drops when the noise resistance 11 is increased.
  • FIG. 2 shows a circuit arrangement with which an improved noise peak suppression is possible while maintaining the failure detection during the potentiometer evaluation.
  • the throttle valve potentiometer 10 is connected to a buffered reference voltage U and to ground, as shown in FIG.
  • the higher voltage is generated via a series resistor 20, which is connected to a battery voltage terminal 21, and a Zener diode 22, which lies between the series resistor 20 and ground.
  • the pull-up resistor 19 can also be connected directly to the battery voltage, that is to say can be connected directly to the battery voltage terminal 21.
  • the input circuitry of the circuit arrangement according to FIG. 2, or the configuration of the throttle valve potentiometer transmitter DKG corresponds to the arrangement already known from FIG.
  • a calculation of the circuit arrangement according to FIG. 2 shows the advantages over the circuits according to FIG. 1.
  • the potential at the analog-digital converter input must be raised above a threshold of approximately 4.9 volts.
  • the total current from analog-digital converter 13 and protective circuit is: I - 3 uA.
  • FIGS. 1 and 2 can of course also be used for other potentiometer evaluations than for throttle valve potentiometer evaluations.
  • An airflow meter, which also contains a potentiometer, is given here as an example.

Abstract

Dispositif pour la détection fiable de pannes et l'élimination des crêtes de bruit parasites lors d'une analyse potentiométrique, dans lequel la sortie de signal du potentiomètre est connectée par l'intermédiaire d'une résistance pull-up (19) à une tension plus élevée par rapport à la tension de référence, de sorte que, lors d'une interruption de la ligne de signal, il est appliqué au convertisseur analogique-numérique suivant (13) un potentiel plus élevé par rapport à celui correspondant à un fonctionnement non perturbé et qui est utilisé pour la détection d'erreurs. Grâce à un dimensionnement approprié du circuit, le courant du frotteur du potentiomètre est maintenu à un seuil minimum et les effets de crêtes de bruits ou de micro-interruptions sont réduits.
PCT/DE1991/000473 1990-06-23 1991-06-05 Dispositif pour la detection fiable de pannes et l'elimination des cretes de bruits parasites pendant une analyse potentiometrique WO1992000504A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4020106.6 1990-06-23
DE4020106A DE4020106C2 (de) 1990-06-23 1990-06-23 Einrichtung zur sicheren Ausfallerkennung und Rauschspitzenunterdrückung bei einer Potentiometerauswertung

Publications (1)

Publication Number Publication Date
WO1992000504A1 true WO1992000504A1 (fr) 1992-01-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1991/000473 WO1992000504A1 (fr) 1990-06-23 1991-06-05 Dispositif pour la detection fiable de pannes et l'elimination des cretes de bruits parasites pendant une analyse potentiometrique

Country Status (2)

Country Link
DE (1) DE4020106C2 (fr)
WO (1) WO1992000504A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2735871A1 (fr) * 1995-06-23 1996-12-27 Renault Procede et dispositif de diagnostic du fonctionnement d'un capteur de type potentiometrique
EP0759558A2 (fr) * 1995-08-18 1997-02-26 Siemens Aktiengesellschaft Procédé de test pour un canal d'entrée analogique d'un circuit de détection de signal analogique et le circuit de détection de signal analogique correspondant
DE19818315C1 (de) * 1998-04-23 1999-09-16 Siemens Ag Einrichtung zum ratiometrischen Messen von Sensorsignalen
DE19833413A1 (de) * 1998-07-24 2000-02-10 Siemens Ag Schaltungsanordnung zum Auslesen mindestens eines potentiometrischen Gebers
DE19905071A1 (de) * 1999-02-08 2000-08-10 Siemens Ag Meßumformer sowie Verfahren zur Diagnose der Versorgung eines Meßumformers
US6580277B1 (en) 1998-04-23 2003-06-17 Siemens Aktiengesellschaft Device for the ratiometric measurement of sensor signals
US6990967B2 (en) 2003-08-28 2006-01-31 Pierburg Gmbh Potentiometer device for determination of valve positions
EP2602695A1 (fr) * 2011-12-09 2013-06-12 Thales Dispositif d'entrée de données à potentiomètre et manche destiné au pilotage d'un aéronef, le manche comprenant le dispositif d'entrée de données

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204623C2 (de) * 1992-02-15 1993-11-25 Bosch Gmbh Robert Einrichtung zur Erfassung einer veränderlichen Größe in Fahrzeugen
DE19728596C2 (de) * 1997-07-04 2000-02-17 Bosch Gmbh Robert Verfahren zur Überwachung eines Potentiometers
DE19949623C1 (de) * 1999-10-14 2001-05-10 Asm Automation Sensorik Messte Störfester Meßumformer für Potentiometer und Verfahren zur Erhöhung der Störfestigkeit
JP3918614B2 (ja) * 2002-04-09 2007-05-23 富士電機デバイステクノロジー株式会社 断線故障検知回路
DE102004021620A1 (de) * 2004-05-03 2005-12-08 Jungheinrich Aktiengesellschaft Vorrichtung zur Erfassung eines Lenkwinkels in einer Lenksteuerung eines Flurförderzeugs
DE102004035945B3 (de) 2004-07-23 2006-04-06 Samson Ag Verfahren zur Überwachung eines Schleifübergangswiderstandes
US8154305B2 (en) * 2010-07-16 2012-04-10 General Electric Company Systems, methods, and apparatus for connection fault self-monitoring with DC bias current
FR2973883B1 (fr) 2011-04-05 2013-05-10 Sagem Defense Securite Procede et systeme de detection d'un court-circuit affectant un capteur

Citations (4)

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Publication number Priority date Publication date Assignee Title
FR2197179A1 (fr) * 1972-08-21 1974-03-22 Motoda Electronics
FR2441852A1 (fr) * 1978-11-16 1980-06-13 Beckman Instruments Inc Ohmmetre numerique avec dispositif de verification de continuite electrique
JPS6357851A (ja) * 1986-08-29 1988-03-12 Japan Electronic Control Syst Co Ltd 絞り弁開度検出装置
EP0274767A1 (fr) * 1986-10-07 1988-07-20 Philips Patentverwaltung GmbH Méthode et circuit pour determiner la position d'une prise d'un transmetteur de résistance à distance

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DE2460079C3 (de) * 1974-12-19 1979-09-27 Schoppe & Faeser Gmbh, 4950 Minden Verfahren zur Bestimmung der Stellung des Schleifers eines Potentiometers und Schaltungsanordnung zur Durchführung des Verfahrens
DE3522775A1 (de) * 1985-06-26 1987-01-08 Daimler Benz Ag Vorrichtung zur bestimmung des rbergangswiderstandes am schleifer eines potentiometers
DE3714697A1 (de) * 1987-05-02 1988-11-10 Vdo Schindling Einrichtung zur ermittlung und/oder beeinflussung von betriebsdaten von kraftfahrzeugen mit verbrennungsmotor
DE3826937A1 (de) * 1988-08-09 1990-02-15 Vdo Schindling Verfahren und schaltungsanordnung zur ueberwachung des uebergangswiderstandes bei einem als stellungsgeber dienenden potentiometer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2197179A1 (fr) * 1972-08-21 1974-03-22 Motoda Electronics
FR2441852A1 (fr) * 1978-11-16 1980-06-13 Beckman Instruments Inc Ohmmetre numerique avec dispositif de verification de continuite electrique
JPS6357851A (ja) * 1986-08-29 1988-03-12 Japan Electronic Control Syst Co Ltd 絞り弁開度検出装置
EP0274767A1 (fr) * 1986-10-07 1988-07-20 Philips Patentverwaltung GmbH Méthode et circuit pour determiner la position d'une prise d'un transmetteur de résistance à distance

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PATENT ABSTRACTS OF JAPAN vol. 12, no. 274 (M-725)(3121) 29. Juli 1988 & JP-A-63 57 851 (JAPAN ELECTRONIC CONTROL SYST CO LTD ) 12. März 1988 siehe das ganze Dokument *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2735871A1 (fr) * 1995-06-23 1996-12-27 Renault Procede et dispositif de diagnostic du fonctionnement d'un capteur de type potentiometrique
EP0759558A2 (fr) * 1995-08-18 1997-02-26 Siemens Aktiengesellschaft Procédé de test pour un canal d'entrée analogique d'un circuit de détection de signal analogique et le circuit de détection de signal analogique correspondant
EP0759558A3 (fr) * 1995-08-18 1997-10-01 Siemens Ag Procédé de test pour un canal d'entrée analogique d'un circuit de détection de signal analogique et le circuit de détection de signal analogique correspondant
WO1999056084A3 (fr) * 1998-04-23 2000-02-24 Siemens Ag Dispositif de mesure radiometrique de signaux emis par des detecteurs
WO1999056084A2 (fr) * 1998-04-23 1999-11-04 Siemens Aktiengesellschaft Dispositif de mesure radiometrique de signaux emis par des detecteurs
DE19818315C1 (de) * 1998-04-23 1999-09-16 Siemens Ag Einrichtung zum ratiometrischen Messen von Sensorsignalen
US6496772B1 (en) 1998-04-23 2002-12-17 Siemens Aktiengesellschaft Device for radiometric sensor signal measurement
US6580277B1 (en) 1998-04-23 2003-06-17 Siemens Aktiengesellschaft Device for the ratiometric measurement of sensor signals
DE19833413A1 (de) * 1998-07-24 2000-02-10 Siemens Ag Schaltungsanordnung zum Auslesen mindestens eines potentiometrischen Gebers
DE19833413C2 (de) * 1998-07-24 2001-07-12 Siemens Ag Verfahren zum Auslesen mindestens eines potentiometrischen Gebers
DE19905071A1 (de) * 1999-02-08 2000-08-10 Siemens Ag Meßumformer sowie Verfahren zur Diagnose der Versorgung eines Meßumformers
US6990967B2 (en) 2003-08-28 2006-01-31 Pierburg Gmbh Potentiometer device for determination of valve positions
EP2602695A1 (fr) * 2011-12-09 2013-06-12 Thales Dispositif d'entrée de données à potentiomètre et manche destiné au pilotage d'un aéronef, le manche comprenant le dispositif d'entrée de données
FR2983987A1 (fr) * 2011-12-09 2013-06-14 Thales Sa Dispositif d'entree de donnees a potentiometre et manche destine au pilotage d'un aeronef, le manche comprenant le dispositif d'entree de donnees
US9188614B2 (en) 2011-12-09 2015-11-17 Thales Data input device with a potentiometer, and joystick intended for piloting an aircraft, said joystick comprising the data input device

Also Published As

Publication number Publication date
DE4020106A1 (de) 1992-01-02
DE4020106C2 (de) 1999-12-09

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