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WO2006129999A1 - Systeme de surveillance de bus reseau - Google Patents

Systeme de surveillance de bus reseau Download PDF

Info

Publication number
WO2006129999A1
WO2006129999A1 PCT/NL2005/000394 NL2005000394W WO2006129999A1 WO 2006129999 A1 WO2006129999 A1 WO 2006129999A1 NL 2005000394 W NL2005000394 W NL 2005000394W WO 2006129999 A1 WO2006129999 A1 WO 2006129999A1
Authority
WO
WIPO (PCT)
Prior art keywords
data network
communication line
voltage
measurement
resistance
Prior art date
Application number
PCT/NL2005/000394
Other languages
English (en)
Inventor
Ronald M.J. Lammers
Robert Johannes Hoevenaar
Original Assignee
Snap-On Incorporated
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 Snap-On Incorporated filed Critical Snap-On Incorporated
Priority to PCT/NL2005/000394 priority Critical patent/WO2006129999A1/fr
Publication of WO2006129999A1 publication Critical patent/WO2006129999A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing
    • H04B3/493—Testing echo effects or singing
    • 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
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
    • 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
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods

Definitions

  • the present invention relates to a network diagnosis method and device for diagnosing a data network comprised in an automotive vehicle .
  • the data network may connect one or more sensors, one or more control systems (electronic control unit, ECU) and one or more actuators with each other.
  • the data network may comprise a number of communication lines providing the connections between the operative elements.
  • the network further comprises a connector for enabling a connection with an external device, such as a diagnosis device.
  • a diagnosis device may communicate via the data network with one or more of the operative elements.
  • an operator may analyse the state of an operative element and/or reprogram an ECU.
  • the present invention provides an analysis method for diagnosing an automotive vehicle data network, the data network operatively coupling at least two operative elements and comprising a number of communication lines, the method comprising: measuring a voltage of a communication line and comparing the measured voltage with a predetermined voltage level in order to determine whether the communication line is shorted; determining a termination resistance of a communication line, and comparing the determined termination resistance with a predetermined termination resistance; and performing a time domain reflectometry, TDR, measurement for localizing an anomaly in the data network.
  • TDR time domain reflectometry
  • a communication failure of the data network may be the cause.
  • the communication failure may be due to a defect operative element, e.g. ECU, or due to a wiring failure, such as a wire break or a short circuit.
  • measuring the voltage of the communication line may be an indicator for a short circuit. The measurement does not provide information on where the short circuit is localized. If no short circuit is present, the measured voltage is substantially equal to the predetermined voltage level. If the predetermined voltage level is present on the communication lines, the termination resistor of the communication line may be defect resulting in the malfunctioning of the communication line. Likewise, if there is a break in the wiring of the network, a measurement of the termination resistance will result in an incorrect resistance value.
  • the termination resistance of the communication line may be measured, for example by providing a known current and measuring a resulting voltage of the communication line, in order to determine a wire break or a defect termination resistor.
  • a Time Domain Reflectometry (TDR) measurement may be performed. The TDR measurement provides information on a distance from a predetermined location to the anomaly location.
  • the operator is enabled to determine in which operative element the short circuit is present by comparing the measured distance with build information of the vehicle.
  • the operator only needs to check, and possibly replace, one ECU instead of possibly checking each ECU connected to the data network and the wiring of the network.
  • the method according to the present invention may be employed for a data network using any kind of network protocol.
  • the method may as well be used mutatis mutandis for diagnosing an optical network.
  • the TDR measurement may be performed using light reflectometry; a light output level measurement may be performed instead of a voltage measurement and a light attenuation measurement may indicate the termination resistance.
  • the present invention provides a device for performing the above method.
  • the device comprises an input-output (I/O) connector for enabling a connection to a network connector of the data network.
  • the device further comprises: a voltage measurement system configured to measure a voltage of a communication line; a resistance measurement system configured to determine a termination resistance of a communication line; and a signal generator and a signal receiver configured to perform a TDR measurement on a communication line.
  • the device comprises a memory storing build information of the automotive vehicle being diagnosed; a processing device for comparing the TDR measurement result with the build information and determining a failure location; and an output device for indicating said failure location.
  • the memory stores information on the vehicle, in particular information on the wiring and operative elements of the data network of the vehicle. Comparing the result of the TDR measurement, i.e. a distance from a connection location to an anomaly in the network, may provide information on the location of the anomaly and in particular on which ECU is defect.
  • the comparison may be performed by a processing device that accesses the memory and receives the TDR measurement result.
  • the result of the comparison may be shown to the operator on an output device, such as a display.
  • the memory may store information of a number of vehicles.
  • the memory may be a reprogrammable or a replaceable memory in order to provide the device with build information specific to the vehicle being diagnosed.
  • Fig. 1 illustrates a data network of an automotive vehicle
  • Fig. 2 illustrates an embodiment of an analysis device according to the present invention.
  • Fig. 1 shows a schematic diagram of a data network 2 of an automotive vehicle.
  • the network 2 comprises wiring 3 connecting a number of operative elements, such as an electronic control unit (ECU) 4, a sensor 6 and an actuator 8.
  • ECU electronice control unit
  • the sensor 6 provides data via the data network to the ECU 4 and in response to the data received from the sensor 6 the ECU 4 sends a control signal via the data network 3 to the actuator 8.
  • the data network 3 may be a bus network, such as a CAN network, using a number of communication lines.
  • the communication lines may be terminated by termination resistors 10.
  • a connector 12 may be provided to enable a connection to an external device such as an analysis device.
  • the communication over the network 3 needs to function correctly.
  • the data network 3 malfunctions due to one or more of a number of possible failures.
  • the failure may be a short circuit or may be an open circuit.
  • These failures may be due to a failure in the wiring or due to a failure in one or more of the operative elements.
  • an operator or repairperson needs to verify each element connected to the network and/or the wiring. Thereto, the operator needs to dismount a lot of parts of the vehicle to gain access to the elements and to verify them. Thereafter, each dismounted part needs to be mounted again. Thus, conventionally, a lot of work is incurred, when the network 3 does not function properly.
  • Fig. 2 schematically shows an analysis device 20 for analyzing a data network, such as shown in Fig. 1, in a case that the data network malfunctions and it is not possible to communicate with one or more of the operative elements connected to the data network.
  • the analysis device 20 is provided with a connector 22 for making a suitable connection to the data network and a number of systems 24 - 34 for performing the analysis and presenting the results thereof.
  • a voltage measurement system 24 is provided in order to determine a voltage present on a communication line of the network.
  • a communication line should have a predetermined voltage level in order to function properly. If a short circuit is present, it is most likely that the voltage on the communication line, e.g. the voltage compared to ground, is different from the predetermined voltage level. Thus, a short circuit is expected, when a voltage other than a voltage substantially equal to the predetermined voltage level is measured.
  • a termination resistor may be verified by providing a current to two communication lines terminated by said termination resistor and measuring the resulting voltage at the ends of said communication lines.
  • a current source 26 may be provided and the voltage measurement system 24 may be employed.
  • the termination resistance measurement is likely to show an incorrect resistance, while the termination resistor is not defective.
  • the operator or repairperson will dismount a number of parts, replace the termination resistor and mount the parts again to find that the problem may still exist .
  • a time domain reflectometry (TDR) measurement may be performed using a suitable TDR system 28 comprising a signal generator and a signal receiver.
  • a signal is generated and provided to a signal carrier, such as a communication line.
  • An anomaly in the carrier results in a reflection of the signal.
  • the reflected signal is received by the signal receiver.
  • a comparison of the generated and the received signal, and a time period lapsed between the signal generation and the receipt of the reflected signal provide information on the distance from the signal generator and receiver to the anomaly. The comparison may as well provide further information on the anomaly found.
  • the anomaly is a failure in an operative element such as an ECU, it may be derived which operative element is causing the failure.
  • a processing unit 30 and a memory 32 are provided.
  • the processing unit is configured to access the memory 32, to receive and process the TDR measurement result and to provide information to an output device 34 such as a display.
  • the memory 32 may comprise build information on the vehicle diagnosed.
  • the memory may be a read-only memory, but may as well be a reprogrammable and/or a replaceable memory in order to provide build information of different vehicles or types of vehicles, if needed.
  • the processing unit 30 is thus enabled to convert the TDR measurement result into a location in the vehicle.
  • the operator receives clear information on the location of the failure and on the kind of failure.
  • all measurement systems 24, 26 and 28 are connected to the processing unit 30.
  • the processing unit 30 may control one or more measurement systems and receive all measurement results.
  • the processing unit 30 may control the current source when measuring the termination resistance.
  • the processing unit 30 may then convert the data received from the measurement systems into clear and simple information for an operator.
  • the information is provided to the output system 34 from which the operator readily understands what kind of failure is present, and where the failure is located.
  • the operator or repairperson only needs to dismount the parts that limit access to the malfunctioning operative element or wire, thereby reducing the time needed for repair and the costs incurred.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

La présente invention concerne un procédé de surveillance du réseau de données d'un véhicule automobile, qui comprend une mesure de tension pour déterminer un court-circuit dans le réseau, une mesure de résistance de terminaison pour détecter une défaillance de terminaison et une mesure par réflectométrie de domaine temporel pour déterminer l'emplacement d'une anomalie éventuelle dans le réseau. Un dispositif exécutant le procédé ci-dessus comprend des systèmes de mesure permettant d'effectuer les mesures sus-mentionnées. Le dispositif peut également comporter une unité de traitement et une mémoire pour stocker des informations de construction concernant le véhicule automobile sous surveillance. De cette façon, le dispositif peut présenter des informations précises sur le type et l'emplacement d'une défaillance dans le véhicule automobile concerné.
PCT/NL2005/000394 2005-05-31 2005-05-31 Systeme de surveillance de bus reseau WO2006129999A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/NL2005/000394 WO2006129999A1 (fr) 2005-05-31 2005-05-31 Systeme de surveillance de bus reseau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL2005/000394 WO2006129999A1 (fr) 2005-05-31 2005-05-31 Systeme de surveillance de bus reseau

Publications (1)

Publication Number Publication Date
WO2006129999A1 true WO2006129999A1 (fr) 2006-12-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2005/000394 WO2006129999A1 (fr) 2005-05-31 2005-05-31 Systeme de surveillance de bus reseau

Country Status (1)

Country Link
WO (1) WO2006129999A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9429463B2 (en) 2013-03-04 2016-08-30 International Road Dynamics, Inc. System and method for measuring moving vehicle information using electrical time domain reflectometry
EP3104557A1 (fr) * 2015-06-08 2016-12-14 Continental Automotive GmbH Dispositif et procédé pour transmettre des données de position d'un véhicule
WO2020182593A1 (fr) * 2019-03-12 2020-09-17 Robert Bosch Gmbh Appareil de commande et procédé pour faire fonctionner un appareil de commande
GB2595253A (en) * 2020-05-19 2021-11-24 Vitesco Tech Gmbh Device and method for detecting termination in communication unit in vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5128619A (en) * 1989-04-03 1992-07-07 Bjork Roger A System and method of determining cable characteristics
US5461318A (en) * 1994-06-08 1995-10-24 Borchert; Marshall B. Apparatus and method for improving a time domain reflectometer
WO2001001158A1 (fr) * 1999-06-25 2001-01-04 Telcordia Technologies, Inc. Systeme et procede de mesures asymetriques servant a determiner la constitution d'une boucle d'abonne
WO2003026160A2 (fr) * 2001-07-05 2003-03-27 Centillium Communications, Inc. Evaluation de ligne asymetrique dans un systeme dsl

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5128619A (en) * 1989-04-03 1992-07-07 Bjork Roger A System and method of determining cable characteristics
US5461318A (en) * 1994-06-08 1995-10-24 Borchert; Marshall B. Apparatus and method for improving a time domain reflectometer
WO2001001158A1 (fr) * 1999-06-25 2001-01-04 Telcordia Technologies, Inc. Systeme et procede de mesures asymetriques servant a determiner la constitution d'une boucle d'abonne
WO2003026160A2 (fr) * 2001-07-05 2003-03-27 Centillium Communications, Inc. Evaluation de ligne asymetrique dans un systeme dsl

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BACKER ET AL: "Telephone Access Network Measurements", TELEPHONE ACCESS NETWORK MEASUREMENTS, 1998, XP002148949 *
ZIEMANN P: "ADSL line qualification tests", HTTP://WWW.WG.COM/APPNOTES/ADSLTEST.HTML, 28 September 2000 (2000-09-28), internet, XP002148948 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9429463B2 (en) 2013-03-04 2016-08-30 International Road Dynamics, Inc. System and method for measuring moving vehicle information using electrical time domain reflectometry
US9880045B2 (en) 2013-03-04 2018-01-30 International Road Dynamics Sensor including electrical transmission-line parameter that changes responsive to vehicular load
US10006799B2 (en) 2013-03-04 2018-06-26 International Road Dynamics Inc. System and method for measuring moving vehicle information using electrical time domain reflectometry
US10859430B2 (en) 2013-03-04 2020-12-08 International Road Dynamics Sensor including electrical transmission-line parameter that changes responsive to vehicular load
US10876884B2 (en) 2013-03-04 2020-12-29 International Road Dynamics Inc. System and method for measuring moving vehicle information using electrical time domain reflectometry
EP3104557A1 (fr) * 2015-06-08 2016-12-14 Continental Automotive GmbH Dispositif et procédé pour transmettre des données de position d'un véhicule
WO2020182593A1 (fr) * 2019-03-12 2020-09-17 Robert Bosch Gmbh Appareil de commande et procédé pour faire fonctionner un appareil de commande
GB2595253A (en) * 2020-05-19 2021-11-24 Vitesco Tech Gmbh Device and method for detecting termination in communication unit in vehicle

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