EP1125103A1 - Vehicle diagnostics interface apparatus - Google Patents
Vehicle diagnostics interface apparatusInfo
- Publication number
- EP1125103A1 EP1125103A1 EP99946464A EP99946464A EP1125103A1 EP 1125103 A1 EP1125103 A1 EP 1125103A1 EP 99946464 A EP99946464 A EP 99946464A EP 99946464 A EP99946464 A EP 99946464A EP 1125103 A1 EP1125103 A1 EP 1125103A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- interface apparatus
- electrical signals
- light
- fault indicator
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
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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.
Abstract
Description
Claims
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ33140498 | 1998-09-18 | ||
NZ33140498 | 1998-09-18 | ||
NZ33268098 | 1998-11-06 | ||
NZ33268098 | 1998-11-06 | ||
NZ33140499 | 1999-05-14 | ||
PCT/NZ1999/000154 WO2000017620A1 (en) | 1998-09-18 | 1999-09-13 | Vehicle diagnostics interface apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1125103A1 true EP1125103A1 (en) | 2001-08-22 |
EP1125103A4 EP1125103A4 (en) | 2003-03-19 |
Family
ID=26651947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99946464A Withdrawn EP1125103A4 (en) | 1998-09-18 | 1999-09-13 | Vehicle diagnostics interface apparatus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1125103A4 (en) |
AU (1) | AU742790B2 (en) |
WO (1) | WO2000017620A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004044881A1 (en) * | 2004-09-14 | 2005-11-17 | Siemens Ag | Vehicle diagnosis interface has housing with computer communications unit and exchangeable multiplexer provided with multipin connector |
AU2014201238A1 (en) * | 2013-03-07 | 2014-09-25 | Telematics Data Systems Limited | Interface |
DE102015010735A1 (en) * | 2015-08-17 | 2017-02-23 | Wabco Gmbh | System and method for diagnosing brake systems |
WO2020104015A1 (en) * | 2018-11-20 | 2020-05-28 | Lisa Dräxlmaier GmbH | Testing device, testing system and testing method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5208543A (en) * | 1991-05-21 | 1993-05-04 | Albiniak Donald W | Power antenna quick tester with optical remote indicator |
US5396422A (en) * | 1991-03-02 | 1995-03-07 | Mercedes-Benz Ag | Method for detecting malfunctions in a motor vehicle |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0685514B2 (en) * | 1985-11-09 | 1994-10-26 | トヨタ自動車株式会社 | Multiplex transmission controller |
US4694408A (en) | 1986-01-15 | 1987-09-15 | Zaleski James V | Apparatus for testing auto electronics systems |
DE3726344A1 (en) * | 1987-08-07 | 1989-02-16 | Porsche Ag | DIAGNOSTIC SYSTEM FOR CONTROL UNITS OF A MOTOR VEHICLE |
JPH076877B2 (en) * | 1987-11-09 | 1995-01-30 | 富士重工業株式会社 | Car failure diagnostic device |
JPH0718779B2 (en) * | 1988-02-16 | 1995-03-06 | 富士重工業株式会社 | Vehicle diagnostic device |
CA2086449C (en) * | 1992-01-06 | 2000-03-07 | Steven W. Rogers | Computer interface board for electronic automotive vehicle service |
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 |
-
1999
- 1999-09-13 WO PCT/NZ1999/000154 patent/WO2000017620A1/en not_active Application Discontinuation
- 1999-09-13 EP EP99946464A patent/EP1125103A4/en not_active Withdrawn
- 1999-09-13 AU AU58866/99A patent/AU742790B2/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5396422A (en) * | 1991-03-02 | 1995-03-07 | Mercedes-Benz Ag | Method for detecting malfunctions in a motor vehicle |
US5208543A (en) * | 1991-05-21 | 1993-05-04 | Albiniak Donald W | Power antenna quick tester with optical remote indicator |
Non-Patent Citations (1)
Title |
---|
See also references of WO0017620A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2000017620A1 (en) | 2000-03-30 |
AU742790B2 (en) | 2002-01-10 |
EP1125103A4 (en) | 2003-03-19 |
AU5886699A (en) | 2000-04-10 |
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