WO2000017620A1 - Appareil d'interfaçage pour diagnostics de vehicules - Google Patents

Appareil d'interfaçage pour diagnostics de vehicules Download PDF

Info

Publication number
WO2000017620A1
WO2000017620A1 PCT/NZ1999/000154 NZ9900154W WO0017620A1 WO 2000017620 A1 WO2000017620 A1 WO 2000017620A1 NZ 9900154 W NZ9900154 W NZ 9900154W WO 0017620 A1 WO0017620 A1 WO 0017620A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
interface apparatus
electrical signals
light
fault indicator
Prior art date
Application number
PCT/NZ1999/000154
Other languages
English (en)
Inventor
Glenn Morris Thorley
Original Assignee
Automotive Electronics Limited
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 Automotive Electronics Limited filed Critical Automotive Electronics Limited
Priority to EP99946464A priority Critical patent/EP1125103A4/fr
Priority to AU58866/99A priority patent/AU742790B2/en
Priority to CA002344333A priority patent/CA2344333A1/fr
Publication of WO2000017620A1 publication Critical patent/WO2000017620A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • 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

Definitions

  • the present invention relates to automotive testing equipment, and in particular to a vehicle diagnostics interface apparatus for interfacing with a vehicle diagnostics unit having one of more vehicle fault indicator lights.
  • vehicle diagnostics interface apparatus for interfacing with a vehicle diagnostics unit having one of more vehicle fault indicator lights, the apparatus comprising; a light sensing device for receiving light from at least one of the vehicle fault indicator lights of the diagnostics unit and converting the received light into electrical signals, a signal processing device for converting the electrical signals into output electrical signals suitable for processing by a vehicle diagnostic information decoding device, and a connection device for connection to the decoding device.
  • a vehicle diagnostics interface apparatus substantially as described above further comprising; a vehicle diagnostic information decoding device connected to the signal processing device by the connection device, for decoding the output electrical signals into vehicle diagnostic information, and an output device for outputting the vehicle diagnostic information.
  • a vehicle diagnostics interface apparatus substantially as described above, wherein the light sensing device is provided separate from the signal processing device and is connected thereto by a cable, and the signal processing device is housed within the connection device.
  • connection device comprises a remote transmission device for transmitting the output electrical signals from the signal processing device to the vehicle diagnostic information decoding device.
  • Such a transmission device may involve a transmitter for producing radio frequency signals, which are received at a radio frequency receiver/s connected to a decoding device/s.
  • this may involve a modem and telephone connection to a remote decoding device.
  • a method of reading information from one or more vehicle fault indicator lights involving detecting changes in properties such as light including the infra red and ultra violet spectrums from one or more fault indicator lights and converting these changes into electrical signals, converting the electrical signals into output electrical signals suitable for processing by a vehicle diagnostic information decoding device, decoding the output electrical signals into vehicle diagnostic information, and outputting the vehicle diagnostic information.
  • the light sensing device may involve any suitable sensor for detecting changes in properties of light including heat from one or more fault indicator lights of the vehicle, so as to be able to detect part or all of the information output from the vehicle fault indicator light/s.
  • This may comprise a photo-sensitive medium which is sensitive to radiation over a sufficiently wide spectrum, for example covering from the infrared to the ultraviolet, to enable reading of the appropriate information.
  • the information may be in the form of on and off pulses, or in the case of ultraviolet radiation for example, in the form of frequency changes.
  • the light may be sensed directly, or by reflection or refraction via an intermediate medium.
  • FIG. 1 shows a first embodiment of a vehicle diagnostics interface apparatus according to the invention
  • FIG. 2 shows a second embodiment of a vehicle diagnostics interface apparatus according to the invention
  • FIG. 3 shows a third embodiment of a vehicle diagnostics interface apparatus according to the invention.
  • FIG. 4 is a flow chart for explaining the operation of the vehicle diagnostics interface apparatus of the invention.
  • the vehicle diagnostics interface apparatus for interfacing with a vehicle diagnostics unit having one of more vehicle fault indicator lights 2, comprises; a sensing device 3 for receiving light from the fault indicator light 2 and producing electrical signals, a signal processing section 4 (shown in the dotted box) for converting the electrical signals into an output voltage 6 (output electrical signals) suitable for processing by a decoding device, and a connection device 8, for connection to a decoding device 9 connected to an output device such as a display screen 10 or printer for outputting the vehicle diagnostic information.
  • a sensing device 3 for receiving light from the fault indicator light 2 and producing electrical signals
  • a signal processing section 4 shown in the dotted box
  • connection device 8 for connection to a decoding device 9 connected to an output device such as a display screen 10 or printer for outputting the vehicle diagnostic information.
  • connection device 8 is shown separate to the signal processing section 4 and is connected thereto by a lead 7.
  • the signal processing section 4 may be housed inside a casing of the connection device 8.
  • a positioning device 12 holds the sensing device 3 in the vicinity of the vehicle fault indicator light/s 2.
  • the sensing device 3 may be any suitable sensor that can detect any change in the fault indicator light 2 output, such as an optical electronic device to detect changes in any part of the light spectrum, or a mechanical or chemical sensor to detect changes in heat or light in any part of their respective spectrums.
  • the positioning device 12 may comprise a suction cup with a purposely bent piece of wire, or a hole through a "non-sealing" part of the suction cup to enable the sensing device 3 to be positioned close to the fault indicator light/s 2.
  • the positioning device 12 may also comprise a base which can be fixed into position and a swivel arrangement and a pivot arm/s attached to it (similar to a desk lamp), to allow the sensing device 3, to be positioned close to the fault indicator light/s 2. Changes in properties such as heat and light 14 emitted from the vehicle fault indicator light/s 2 are converted to electrical signals through the medium of the sensing device 3, and then travel along electrical wires 16 to the signal processing section 4.
  • a shielding material 18 can be fixed in position by attaching for example to the electrical wires 16, the positioning device 12, or the sensing device 3.
  • the shielding material 18 may be any suitable material such as cloth, paper, cardboard, wood, plastic or metal.
  • the sheilding material 18 may comprise a plastic block which has been drilled out in one axis to accomdate the sensing device 3.
  • the sheilding material 18 may also comprise a cloth designed to be placed for example, over the vehicle dashboard or vehicle computer LED. There may be several separate sheilding materials 18 used as necessary for the particular vehicle under test.
  • the shielding material 18 may also be a separate non attached device which can be used to prevent the influence of external light or heat.
  • the signal processing section 4 being one example of a suitable circuit, will now be described.
  • Numeral 20 denotes a power supply to the circuit, which may comprise a computer parallel or serial port or an external battery and switch or an AC mains derived power source.
  • the external battery may be the vehicles own battery or a separate battery.
  • connections such as a "cigarette lighter" adapter or alligator clips can be used to connect to the vehicle battery, and the vehicle ignition switch may be used as a switch.
  • the sensing device 3 may be any suitable optical electronic sensor, for any part of the light spectrum that can detect any change in the fault indicator light 2 output.
  • a capacitor 24, prevents a voltage present at a positive input of an operational amplifier 26 from falling as quickly as a voltage at a negative input of the operational amplifier 26.
  • a capacitor 27 serves as a filtering capacitor to minimize interference from noise.
  • the operational amplifier 26 is configured as a comparator by using resistors 28 and 29 to set the reference voltage for the negative input, and resistors 30, 31 and 32 to set the reference voltage for the positive input of the operational amplifier 26.
  • the output voltage 6 is connected via the connection device 8 to the decoding device 9 to determine the codes from the voltage fluctuations. It should be noted however that the novelty of this embodiment of the invention is found in the configuration of the sensing device 3, the signal processing section 4 and the connection device 8, and is not limited to the whole configuration including the decoding device 9 and the output device 10 as shown in FIG. 1.
  • the decoding device 9 may be any suitable device. This may involve a program based on the program used in U.S. Patent No. 4,694,408.
  • a suitable decoding device may be a Personal Computer (PC) having a display screen 10, with wires between the connection device 8 and the parallel or serial port of the PC, and software written to decode the output voltage swings of the output voltage 6.
  • the decoding device 9 may also be a customised microprocessor with pre-programmed memory, and a display screen 10. all encased in a suitable hand held casing.
  • a resistor 33 limits the current to an LED 34, which can be used to display the output voltage swings of the operational amplifier 26 visually to the user.
  • the sensing device 3 for receiving light from the fault indicator light 2 and producing an electrical output is provided outside of the signal processing section 4 and connected by electrical wires 16 thereto.
  • FIG. 2 shows a second embodiment of the present invention generally indicated by arrow 35.
  • the sensing device 3 is housed inside (or close to) the signal processing section 4, and a light transmitting cable 36 such as a fibre optic cable employing glass, plastic or a nylon material, is used to transfer the light 14 from the fault indicator light/s 2 to the sensing device 3.
  • a light transmitting cable 36 such as a fibre optic cable employing glass, plastic or a nylon material, is used to transfer the light 14 from the fault indicator light/s 2 to the sensing device 3.
  • An adapter 37 suitable for optical connection to the sensing device 3 is provided on a casing of the signal processing section 4.
  • the positioning device 12 is adapted for positioning the light transmitting cable 36 near a fault indicator light/s 2 in the vehicle, and may be of a similar construction that used for positioning the sensing device 3 in the arrangement of FIG. 1. Similarly a shielding material 18 similar to that used in the arrangement of FIG. 1 may be employed.
  • the operation of the electronic circuit 4 in FIG. 2 is similar to that of the electronic circuit 4 in FIG. 1 and description thereof is omitted.
  • FIG. 3 shows a third embodiment of a vehicle diagnostics interface apparatus according to the present invention generally indicated by arrow 40.
  • components having a similar function to those of the embodiment of FIG. 1 are denoted by the same symbols, and description thereof is omitted.
  • connection device 8 comprises a remote transmission device in the form of a radio transmitter 42 for transmitting the electrical output signals 6 to a radio receiver 44.
  • the frequency of the radio transmitter 42 can be any frequency allowed in the particular location of use.
  • radio transmitter 42 for the connection device 8
  • other suitable transmission means may be employed to transfer the output signals 6 of the electronic circuit 4, such as using an optical coupling covering any suitable frequency spectrum including the infra-red spectrum.
  • the operation of the electronic circuit 4 in FIG. 3 is similar to that of the electronic circuit 4 in FIG. 1 and description thereof is omitted.
  • the output of the electronic circuit 4 is connected by electrical wires 7 to the radio transmitter 42 of the connection device 8.
  • the radio receiver 44 detects radio waves 43 from the radio transmitter 42.
  • the output of the radio receiver 44 is connected by electrical wires 46 to a decoding device 9 similar to that of the first embodiment of FIG. 1.
  • Decoding of the output voltage swings of output voltage 6 from the respective diagnostics interface apparatuses 1, 35 and 40 of the above described embodiments involves comparing the output pulses with prestored codes for various vehicles. Typical methods for achieving this are disclosed in US. Patent No. 4,694,408.
  • FIG. 4 shows the main steps of a typical computer program used for decoding vehicle diagnostic information.
  • the sensing device 3 In preparation for reading information from one or more vehicle fault indicator lights 2.
  • the sensing device 3 is positioned in the vicinity of the vehicle fault indicator light/s 2 using the positioning device 12, the area shielded by the shielding material 18 to prevent external light or heat other than from the vehicle fault indicator light/s 2 from affecting the readings, and the electrical wires 16 (or cable 36) connected to the signal processing section 4 (or adapter 37).
  • the connector 8 of the signal processing section 4 is connected to an input port of the decoding device 9, such as a computer, using for example the printer port connector.
  • a computer program for executing the decoding is loaded beforehand into computer memory from a floppy disk or CD ROM or the like.
  • step 1 the computer is switched on to start the program.
  • Switching on the computer also provides power to the signal processing section 4, thereby starting the signal processing to read information from the vehicle fault indicator light 2. That is, changes in properties such as heat or light from the fault indicator light 2 are converted into electrical signals through the medium of the sensing device 3 and these electrical signals then converted into output electrical signals by the signal processing section 4 suitable for processing by the decoding device 9.
  • step 2 information such as the vehicle make, type of connector, or model is selected from a display screen 10 of the decoding device 9 (computer).
  • step 3 information on the selected vehicle is displayed on the screen.
  • Such information may include details of any connections to be made to the vehicle diagnostics unit, such as shorting between pins on the diagnostics unit connector to make the indicator lights function in diagnostic mode.
  • this may include instructions for preparing the vehicle, such as turning on the key.
  • a computer display screen can be used for the output device 10, a vast amount of information can be clearly displayed.
  • books containing fault chart codes and operating instructions and the like can be obviated, this information being stored in the computer 9.
  • step 4 the program reads the output electrical signals 6 from the signal processing section 4 which are input to the input port of the computer 9. Decoding of the electrical signals into vehicle information is then commenced.
  • step 5 if after a specified time there is no data at the port, then in step 6 a time out message is output and the program is terminated.
  • step 5 if there is data at the port, control proceeds to step 7 where the timing of the data at the port, that is for example the duration and sequence of pulse information, is decoded according to a prestored algorithm for the particular vehicle.
  • step 8 a code number is generated for the data, and in step 9 the code number is compared with prestored code numbers. For example this involves using a prestored table such as shown in Table 2.
  • step 10 the corresponding code such as shown in Table 2, is output for example to a computer screen, or printed out. If no faults are present a no fault code message is printed.
  • the sensing device 3 may be of any suitable type of sensor such as a mechanical, electrical, chemical, optical, or any combination of these sensor types.
  • light used herein refers to any part of the light spectrum including the infra red and ultra violet spectrums.
  • vehicle used herein refers to any type of vehicle that runs on any type of fuel, such as cars, vans, utilities, trucks, boats, planes, trains, motorcycles, tractors, heavy industrial earth moving machinery, fork lifts and recreational vehicles.
  • fault indicator light used herein is often called a “Check Engine Light (CEL)", or a “Malfunction Indicator Light” (MIL) by automotive trades people.
  • CEL Check Engine Light
  • MIL Metal Indicator Light
  • fault indicator light used herein may also refer to LEDS which are used by many manufacturers to visually convey fault codes.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

L'invention porte sur un appareil (1) pour diagnostics de véhicules servant d'interface avec une unité de diagnostics et comportant: un ou plusieurs voyants (2) signalant les pannes du véhicule; un détecteur (3) recevant la lumière du voyant (2) et produisant des signaux électriques; une unité de traitement des signaux (4) (à l'intérieur du cadre en pointillés) convertissant les signaux électriques en une tension de sortie (6) (sortie de signaux électriques) pouvant être traitée par un dispositif de décodage; et un dispositif (8) de raccordement avec un système de décodage relié à un dispositif de sortie tel qu'un écran (10) ou une imprimante présentant les informations relatives au diagnostic du véhicule.
PCT/NZ1999/000154 1998-09-18 1999-09-13 Appareil d'interfaçage pour diagnostics de vehicules WO2000017620A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99946464A EP1125103A4 (fr) 1998-09-18 1999-09-13 Appareil d'interfa age pour diagnostics de vehicules
AU58866/99A AU742790B2 (en) 1998-09-18 1999-09-13 Vehicle diagnostics interface apparatus
CA002344333A CA2344333A1 (fr) 1998-09-18 1999-09-13 Appareil d'interfacage pour diagnostics de vehicules

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
NZ331404 1998-09-18
NZ33140498 1998-09-18
NZ33268098 1998-11-06
NZ332680 1998-11-06
NZ331404/332680 1999-05-14

Publications (1)

Publication Number Publication Date
WO2000017620A1 true WO2000017620A1 (fr) 2000-03-30

Family

ID=26651947

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ1999/000154 WO2000017620A1 (fr) 1998-09-18 1999-09-13 Appareil d'interfaçage pour diagnostics de vehicules

Country Status (3)

Country Link
EP (1) EP1125103A4 (fr)
AU (1) AU742790B2 (fr)
WO (1) WO2000017620A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044881A1 (de) * 2004-09-14 2005-11-17 Siemens Ag Fahrzeugdiagnoseinterface
DE102015010735A1 (de) * 2015-08-17 2017-02-23 Wabco Gmbh System und Verfahren zur Diagnose von Bremsanlagen
WO2020104015A1 (fr) * 2018-11-20 2020-05-28 Lisa Dräxlmaier GmbH Dispositif de vérification, système de vérification et procédé de vérification

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2014201238A1 (en) * 2013-03-07 2014-09-25 Telematics Data Systems Limited Interface

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62111543A (ja) * 1985-11-09 1987-05-22 Toyota Motor Corp 多重伝送制御装置
US4694408A (en) 1986-01-15 1987-09-15 Zaleski James V Apparatus for testing auto electronics systems
JPH01123131A (ja) * 1987-11-09 1989-05-16 Fuji Heavy Ind Ltd 自動車用故障診断装置
US4926352A (en) * 1987-08-07 1990-05-15 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Diagnostic system for control apparatus of a motor vehicle
US5003478A (en) * 1988-02-16 1991-03-26 Fuji Jukogyo Kabushiki Kaisha Diagnosis system for a motor vehicle
US5459660A (en) * 1993-12-22 1995-10-17 Chrysler Corporation Circuit and method for interfacing with vehicle computer
US5481906A (en) * 1993-06-30 1996-01-09 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Fault diagnosis apparatus and method for vehicle control system
US5646865A (en) * 1994-10-27 1997-07-08 General Motors Corporation Automotive diagnostic communications
US5734569A (en) * 1992-01-06 1998-03-31 Snap-On Technologies, Inc. Computer interface board for electronic automotive vehicle service equipment

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106717C1 (fr) * 1991-03-02 1992-01-02 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
US5208543A (en) * 1991-05-21 1993-05-04 Albiniak Donald W Power antenna quick tester with optical remote indicator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62111543A (ja) * 1985-11-09 1987-05-22 Toyota Motor Corp 多重伝送制御装置
US4694408A (en) 1986-01-15 1987-09-15 Zaleski James V Apparatus for testing auto electronics systems
US4926352A (en) * 1987-08-07 1990-05-15 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Diagnostic system for control apparatus of a motor vehicle
JPH01123131A (ja) * 1987-11-09 1989-05-16 Fuji Heavy Ind Ltd 自動車用故障診断装置
US5003478A (en) * 1988-02-16 1991-03-26 Fuji Jukogyo Kabushiki Kaisha Diagnosis system for a motor vehicle
US5734569A (en) * 1992-01-06 1998-03-31 Snap-On Technologies, Inc. Computer interface board for electronic automotive vehicle service equipment
US5481906A (en) * 1993-06-30 1996-01-09 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Fault diagnosis apparatus and method for vehicle control system
US5459660A (en) * 1993-12-22 1995-10-17 Chrysler Corporation Circuit and method for interfacing with vehicle computer
US5646865A (en) * 1994-10-27 1997-07-08 General Motors Corporation Automotive diagnostic communications

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; AN 1987-111543 *
DATABASE WPI Derwent World Patents Index; AN 1989-123131 *
See also references of EP1125103A4

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044881A1 (de) * 2004-09-14 2005-11-17 Siemens Ag Fahrzeugdiagnoseinterface
DE102015010735A1 (de) * 2015-08-17 2017-02-23 Wabco Gmbh System und Verfahren zur Diagnose von Bremsanlagen
WO2020104015A1 (fr) * 2018-11-20 2020-05-28 Lisa Dräxlmaier GmbH Dispositif de vérification, système de vérification et procédé de vérification

Also Published As

Publication number Publication date
EP1125103A1 (fr) 2001-08-22
AU742790B2 (en) 2002-01-10
EP1125103A4 (fr) 2003-03-19
AU5886699A (en) 2000-04-10

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