WO1999001774A1 - Dispositif de diagnostic de detection d'erreurs pour un capteur inductif - Google Patents

Dispositif de diagnostic de detection d'erreurs pour un capteur inductif Download PDF

Info

Publication number
WO1999001774A1
WO1999001774A1 PCT/DE1998/001836 DE9801836W WO9901774A1 WO 1999001774 A1 WO1999001774 A1 WO 1999001774A1 DE 9801836 W DE9801836 W DE 9801836W WO 9901774 A1 WO9901774 A1 WO 9901774A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
diagnostic
vdiag
diagnostic device
vref
Prior art date
Application number
PCT/DE1998/001836
Other languages
German (de)
English (en)
Inventor
Alfons Fisch
Horst Punzmann
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1999001774A1 publication Critical patent/WO1999001774A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
    • G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
    • 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
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2829—Testing of circuits in sensor or actuator systems

Definitions

  • the invention relates to a diagnostic device for detecting incorrect conclusions in an inductive sensor according to the preamble of claim 1.
  • Inductive sensors are used, for example, in motor vehicle electronics to measure the position and speed of the crankshaft of an internal combustion engine in order to control or regulate ignition or fuel injection. They are also used in the measurement of wheel speed for processing n anti-lock braking systems (ABS) and traction control systems (ASR).
  • ABS anti-lock braking systems
  • ASR traction control systems
  • the inductive sensor consists of a coil winding with a magnetized core, on which a sensor element m in the form of a gearwheel synchronized with the crankshaft or the wheel, the flanks of which induce a characteristic voltage when the inductive sensor m moves past the coil winding.
  • the course of this induction voltage is generally meandering and can be regarded as sinusoidal in a first approximation.
  • the evaluation electronics which contain a comparator circuit, which are connected downstream of the inductive sensor, mainly detect the zero crossings of the induction voltage (the sensor signal) and form them into a digital output signal which is fed to further control or regulating devices.
  • the subsequent processing of the digital output signal of the comparator connected downstream of the inductive sensor usually takes place in a microcontroller of an engine control unit, by means of which the ignition and fuel injection are controlled.
  • the cables are fed to the inductive sensors in the motor vehicle via cable harnesses with shielded cables, where necessary.
  • a method and a device for testing the sensitivity of inductive sensors is known.
  • a first signal proportional to the amplitude of the voltage generated by the sensor and, at the same time, a second signal proportional to the frequency of the pulses are formed.
  • a third signal is formed from the ratio of the first to the second signal, which is compared with a predetermined variable, which is typical for the sensor type, the difference between the third signal and the typical variable being used as a good criterion.
  • the three signals are formed simultaneously by means of a coil as a low-pass filter, which is connected with a shunt between the connections of the inductive sensor, an evaluation unit being connected to the connection point between the coil and the resistor.
  • This method and the associated device serve the purpose of being able to check the sensitivity of the inductive sensor in the frequency or speed range of interest, in particular at low speeds. It should also be checked whether, for example, the wheel sensors in anti-lock braking systems (ABS) emit sufficiently high signals so that the position of the wheel sensor can also be checked with respect to the sensor element connected to the wheel.
  • ABS anti-lock braking systems
  • the present invention is therefore based on the object of a diagnostic device for detecting incorrect conclusions and
  • the diagnostic device consists of a series circuit connected between the connections of the inductive sensor and composed of two identical components or component combinations (resistors, capacitors, coils), the connection point of which is connected to a reference voltage source via a further resistor At this connection point, a diagnostic voltage can be tapped, which can be evaluated in a discrimination device for the diagnosis of characteristic incorrect conclusions.
  • the series circuit consists of a “symmetrical” voltage divider consisting of two resistors of the same size, the tapping of which is connected to the connection of the reference voltage source via a further resistor.
  • the tapped diagnostic voltage can be evaluated in a discrimination circuit, for example by comparison with threshold values or after digitization, for example in a microcontroller, by means of a program and the errors can be displayed.
  • the diagnostic device has the essential advantage that a large number of characteristic incorrect conclusions (interruption or termination of the coil winding or a supply line to the supply voltage or to ground reference potential) can be detected, evaluated and displayed with relatively few components.
  • An embodiment of the invention is shown in the single figure and shows a basic circuit diagram of the diagnostic device according to the invention.
  • the reference number 1 shows an inductive sensor with its coil winding and the magnetized core, on which the transmitter element 2 can be moved past.
  • the transmitter element 2 is, for example, a gear wheel connected to a crankshaft or a flywheel of an internal combustion engine with a characteristic gap, which is used to determine the position of the crankshaft, in particular to determine the top dead center.
  • the reference numerals 10 and 11 identify connecting lines between the sensor 1 and an evaluation electronics 3.
  • Reference numerals 5 and 6 identify the connections of the inductive sensor 1.
  • the connecting lines 10 and 11 lead via two resistors R4 and R5 to a downstream evaluation electronics 3, which is operated with a supply voltage Vsupply.
  • the evaluation electronics 3 essentially consist of a comparator 9, at the output of which a digital output signal Vout for processing the sensor output signal in a subsequent, not shown provided control or regulating device is provided.
  • Antiparallel diodes D1 and D2 are connected between the non-inverting (+) and inverting (-) input of the comparator 9, essentially for better detection of the zero crossings of the sensor output signal for its digitization.
  • a capacitor C2 is connected between the two inputs of the comparator 9 and between each input (+, -) of the comparator 9 and ground reference potential there is a capacitor C1 or C3.
  • the capacitors C1, C2, C3 in cooperation with the resistors R4 and R5 have a low-pass characteristic in order to suppress high-frequency components of the inductive sensor signal or interference.
  • the diagnostic device consists of the series connection between the connecting lines 10 and 11 of the inductive sensor 1 and consists of two resistors R2 and R3, the connection point 8 of which is connected to a reference voltage source Vref via a further resistor R1.
  • the diagnostic voltage Vdiag can be tapped off at this connection 8 and is used to diagnose characteristic incorrect conclusions of the above. Type can be evaluated in a discrimination facility D, as will be described below.
  • a capacitor C4 is connected between terminal 8 and ground reference potential to suppress high-frequency interference.
  • the supply voltage source Vsupply and the reference voltage source Vref have common ground reference potential.
  • a compensating current flows between the supply voltage source Vsupply and the reference voltage source Vref via the resistors R1 and the parallel connection of R2 and R3, which produces a voltage drop across all resistors.
  • the existing shield cable as capacitive coupling also to ground reference potential.
  • the AC voltage generated by the inductive sensor 1 becomes highly asymmetrical and can be evaluated in the discrimination device D with a further logic gate circuit or, after analog-digital conversion, can be processed into an error signal by means of a program, for example in a microcontroller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention concerne un dispositif de diagnostic pour un capteur inductif (1) au niveau duquel on peut déplacer un élément de capteur (2), un signal de sortie numérique (Vout) étant généré par un circuit électronique d'évaluation (3). On monte entre les lignes de liaison (10, 11) un diviseur de tension symétrique (R2, R3) dont la prise (8) est reliée, par l'intermédiaire d'une résistance (R1), à une source de tension de référence (Vref). On évalue, dans un dispositif de discrimination (D) situé en aval, la tension de diagnostic (Vdiag) prélevée au niveau de la prise (8) afin de détecter d'éventuelles erreurs caractéristiques.
PCT/DE1998/001836 1997-07-02 1998-07-02 Dispositif de diagnostic de detection d'erreurs pour un capteur inductif WO1999001774A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19728256 1997-07-02
DE19728256.3 1997-07-02

Publications (1)

Publication Number Publication Date
WO1999001774A1 true WO1999001774A1 (fr) 1999-01-14

Family

ID=7834420

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/001836 WO1999001774A1 (fr) 1997-07-02 1998-07-02 Dispositif de diagnostic de detection d'erreurs pour un capteur inductif

Country Status (1)

Country Link
WO (1) WO1999001774A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10377360B1 (en) 2018-07-04 2019-08-13 Nxp Usa, Inc. Resistive short circuit immunity for wheel speed sensor interface on braking system
DE102018132775A1 (de) * 2018-12-19 2020-06-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Schaltungsvorrichtung für ein Fahrzeug und Verfahren zum Betreiben einer Schaltungsvorrichtung
US10890598B2 (en) 2019-01-09 2021-01-12 Nxp Usa, Inc. Companion chip short circuit immunity
CN114152777A (zh) * 2021-11-19 2022-03-08 中国北方发动机研究所(天津) 一种磁电转速传感器试验自动检测用电路

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902970A (en) * 1987-03-20 1990-02-20 Bendix Electronics S.A. Apparatus for measuring the speed of an object with circuit for converting analog signals into logic signals and circuit for varying sensitivity
JPH05133962A (ja) * 1991-11-13 1993-05-28 Sumitomo Electric Ind Ltd 車輪速センサ信号系の故障診断装置
US5406485A (en) * 1993-11-09 1995-04-11 Delco Electronics Corp. Method and apparatus for detecting faulty operation of a wheel speed sensor
US5579235A (en) * 1992-04-07 1996-11-26 Robert Bosch Gmbh Method of monitoring rpm sensors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902970A (en) * 1987-03-20 1990-02-20 Bendix Electronics S.A. Apparatus for measuring the speed of an object with circuit for converting analog signals into logic signals and circuit for varying sensitivity
JPH05133962A (ja) * 1991-11-13 1993-05-28 Sumitomo Electric Ind Ltd 車輪速センサ信号系の故障診断装置
US5579235A (en) * 1992-04-07 1996-11-26 Robert Bosch Gmbh Method of monitoring rpm sensors
US5406485A (en) * 1993-11-09 1995-04-11 Delco Electronics Corp. Method and apparatus for detecting faulty operation of a wheel speed sensor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 509 (P - 1612) 13 September 1993 (1993-09-13) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10377360B1 (en) 2018-07-04 2019-08-13 Nxp Usa, Inc. Resistive short circuit immunity for wheel speed sensor interface on braking system
EP3590776A1 (fr) * 2018-07-04 2020-01-08 NXP USA, Inc. Immunité de court circuit résistif pour interface de capteur de vitesse de roue sur un système de freinage
CN110687312A (zh) * 2018-07-04 2020-01-14 恩智浦美国有限公司 制动系统上的车轮速度传感器接口的电阻性短路抗扰性
DE102018132775A1 (de) * 2018-12-19 2020-06-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Schaltungsvorrichtung für ein Fahrzeug und Verfahren zum Betreiben einer Schaltungsvorrichtung
US10890598B2 (en) 2019-01-09 2021-01-12 Nxp Usa, Inc. Companion chip short circuit immunity
CN114152777A (zh) * 2021-11-19 2022-03-08 中国北方发动机研究所(天津) 一种磁电转速传感器试验自动检测用电路

Similar Documents

Publication Publication Date Title
AT511807B1 (de) Verfahren und vorrichtung zur online-erkennung einer zustandsverschlechterung einer isolierung in einer elektrischen maschine
EP1032846B1 (fr) Dispositif de diagnostic destine a detecter des courts-circuits errones ou des interruptions de lignes de capteurs inductifs
EP1121601B1 (fr) Procede et circuit de traitement de signaux pour un detecteur de mouvement
EP3637114A1 (fr) Système de haut voltage et procédé de surveillance des erreurs d'isolation dans un système de haut voltage
EP2623940B1 (fr) Vérification d'un agencement d'appareil de mesure, agencement d'appareil de mesure correspondant et agencement de vérification
EP0417423A2 (fr) Circuit pour la détection de la vitesse de rotation d'une roue
WO2014037465A1 (fr) Procédé et circuit permettant de contrôler la plausibilité d'un résultat de mesure de capteur de courant
EP1441937A1 (fr) Circuit d'evaluation con u pour un capteur inductif
WO2016202632A1 (fr) Procédé et circuit pour détecter une ligne ouverte de la bobine réceptrice sinus/cosinus d'un résolveur
DE19615203A1 (de) Einrichtung zur Erkennung von elektromagnetischen Einstreuungen
EP0497994A1 (fr) Méthode et circuit pour la surveillance d'une chaîne de mesure d'ions ou d'un potentiel redox
EP1135695B1 (fr) Procede et circuit pour determiner la direction d'un champ magnetique exterieur
WO1999001774A1 (fr) Dispositif de diagnostic de detection d'erreurs pour un capteur inductif
DE19632457C1 (de) Schaltungsanordnung zur Überwachung eines Sensors
DE3541852C2 (de) Überwachungsanordnung für Drehzahlgeber
DE2841289A1 (de) Verfahren und vorrichtung zum pruefen von induktiven impulsgebern
DE3516036A1 (de) Verfahren und vorrichtung zur sicheren bestimmung des abstandes eines magnetischen sensors von einer leitfaehigen reaktionsschiene
DE10145485B4 (de) Verfahren und Vorrichtung zur Diagnose eines Sensors
WO2016202631A1 (fr) Procédé et circuit pour détecter une ligne d'excitation ouverte d'un résolveur
DE10142169A1 (de) Verfahren und Vorrichtung zum Überwachen einer Sensoreinheit
DE19741780B4 (de) Verfahren zur Erkennung von Leitungsbrüchen bei einem induktiven Sensor
EP3837497B1 (fr) Transformateur comprenant un circuit de test
EP0927356B2 (fr) Procede de verification de composants electriques et dispositif permettant de mettre ledit procede en oeuvre
EP0540878B1 (fr) Dispositif pour l'évaluation d'impulsions d'allumage
EP0529281B1 (fr) Procédé de détection d'une mise en contact des lignes de mesure

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CA CN CZ KR MX US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

WA Withdrawal of international application
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA