Method and apparatus for automotive and other testing

• US 6,477,478 B1
• Filed: 07/10/2000
• Issued: 11/05/2002
• Est. Priority Date: 08/28/1998
• Status: Expired due to Fees

• Current Assignee: Snap-on Equipment Ltd. (Snap-On Incorporated)
• Original Assignee: Snap-on Equipment Ltd. (Snap-On Incorporated)
• Inventors: Smith, Paul, Jones, Barbara L.
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): Raymond, Edward
• Application Number:
  US09/529,249
• Time in Patent Office: 848 Days
• Field of Search: 714/1, 714/47, 714/100, 714/25, 714/26, 714/46, 714/799, 340/500, 701/12, 701/29, 701/34, 702/33, 702/34, 702/35, 702/36, 702/57, 702/58, 702/59, 702/81, 702/105, 702/121, 324/500, 324/503, 324/512, 324/528, 324/772
• US Class Current: 702/102
• CPC Class Codes: G01M 15/05 by combined monitoring of two or more different engine parameters

Abstract

A method and apparatus for automotive testing comprises a base station and at least two handsets adapted to provide a testing function in at least two corresponding technically distinct areas. Embodiments employ Kelvin connectors and/or Hall effect probes and/or induction probes. System operation is effected by the simplest and minimum number of control commands.

Claims

1. A method of testing applicable to the identification of faults and to making of other routine tests in automotive vehicles and like electrical and/or electro-mechanical and/or hydro-mechanical systems or assemblies or components, the method comprising :

a) providing a base station and a handset connectable to said base station for signal transmission purposes;

b) providing at least one power source for said base station and said handset, and signal transmission means for said handset adapted to effect test signal transmission between said handset and said system or assembly or component under test;

c) said handset and/or said base station being adapted to effect processing of test signals sensed and/or generated by and/or induced in or by said signal transmission means for fault identification and/or performance evaluation purposes;

d) said handset being adapted to carry out test procedures on and in the vicinity of said system or assembly or component under test by interaction with said system or assembly or component under test through said signal transmission means;

characterised by

e) said method being adapted to provide identification of a range of two or more faults in technically distinct areas by means of a single set of apparatus, at least two of said handsets being provided, each handset being adapted to provide a technically distinct analysis function applicable to at least two technically distinct areas of evaluation of the same or a different system or assembly or component under test, and each being adapted to provide its own technically distinct data stream to said base station through its signal transmission connection to said base station;

f) said base station being adapted to process said at least two technically distinct data streams provided from said at least two handsets to identify characteristics providing identification means for fault-tracing and/or performance evaluation purposes in said at least two technically distinct areas; and

g) said method comprising employing said at least two handsets and said associated base station in sequence to provide said fault-tracing and/or performance evaluation on the same or different systems or assemblies or components in said at least two technically distinct areas by means of a single set of apparatus.

3. A method according to claim 1 or claim 2 characterised by at least one of said handsets being adapted to effect battery evaluation and said method comprising the step of causing said at least one of said handsets to effect said battery evaluation by said signal transmission between the battery under test and said handset.

4. A method according to claim 1 or claim 2 characterised by at least one of said handsets being adapted to effect brake evaluation and said method comprising the step of causing said at least one of said handsets to effect said brake evaluation by said signal transmission between the brake or associated structure under test and said handset.

5. A method according to claim 1 or claim 2 characterised by said at least one of said handsets being adapted to effect battery and/or starter system evaluation, and said method comprising the step of employing a Kelvin connection to said battery and/or starter system.

6. A method according to claim 1 or claim 2 characterised by at least one of said handsets being adapted to effect electrical system evaluation and said method comprising the step of employing a temperature sensor to connect to said electrical system.

7. A method according to claim 1 or claim 2 characterised by the step of carrying out a test sequence comprising one or more tests selected from the group comprising self-testing and external battery testing and starter testing and vehicle running test.

8. A method according to claim 1 or claim 2 characterised by at least one of said handsets being adapted to effect tracing of intermittent wiring faults and said handset comprising a Kelvin connector to effect said test signal transmission between said handset and said system comprising a wiring fault, and the method comprising applying a high pulse current to said system to determine the presence of a resistance fault of the order of less than one ohm.

9. A method according to claim 1 or claim 2 characterised by at least one of said handsets being adapted to effect tracing of a fault in a circuit which is powered at all times, the method comprising employing a Hall effect probe or an induction probe to analyse current in one or more conductors of said circuit.

2. A method of testing characterised by providing at least two handsets each adapted to provide a technically distinct analysis function and a corresponding data stream to a base station which is adapted to process said data streams to identify characteristics providing identification means for fault-tracing and/or performance evaluation purposes, the method comprising employing the handsets to provide said functions in said technically distinct areas by means of a single set of apparatus.

10. A method of testing applicable to the identification of faults and/or to the making of other routine tests in automotive vehicles and like electrical and/or electro-mechanical and/or hydro-mechanical systems or assemblies or components, the method comprising :

a) providing a handset and signal transmission means for said handset adapted to effect test signal transmission between said handset and a system or assembly or component under test;

b) said handset being adapted to effect processing of test signals sensed and/or generated and/or induced in or by said signal transmission means for fault identification and/or performance evaluation purposes;

c) said handset being adapted to carry out test procedures on and in the vicinity of said system or assembly or component under test by interaction with said system or assembly or component under test through said signal transmission means;

characterised by

d) said handset being adapted to effect battery and/or starter system evaluation and the method comprising employing a Kelvin connection to said battery and/or starter system.

11. A method of testing applicable to the identification of faults and/or to the making of other routine tests in automotive vehicles and like electrical and/or electro-mechanical and/or hydro-mechanical systems or assemblies or components, the method comprising:

a) providing a handset and signal transmission means for said handset adapted to effect test signal transmission between said handset and a system or assembly or component under test;

b) said hand set being adapted to effect processing of test signals sensed and/or generated and/or induced in or by said signal transmission means for fault identification and/or performance evaluation purposes;

c) said handset being adapted to carry out test procedures on and in the vicinity of said system or assembly or component under test by interaction with said system or assembly or component under test through said signal transmission means;

characterised by

d) said handset being adapted to effect tracing of intermittent wiring faults and said handset comprising a Kelvin connector to effect said test signal transmission between said handset and said system comprising a fault and the method comprising applying a high pulse current to said system to determine the presence of an impedance fault of relatively low value.

12. Apparatus for testing applicable to the identification of faults and to making of other routine tests in automotive vehicles and like electrical and/or electro-mechanical and/or hydro-mechanical systems or assemblies or components, the apparatus comprising:

a) a base station and a handset connectable to said base station for signal transmission purposes;

b) at least one power source for said base station and said handset, and signal transmission means for said handset adapted to effect test signal transmission between said handset and said system or assembly or component under test;

c) said handset and/or said base station being adapted to effect processing of test signals sensed and/or generated by and/or induced in or by said signal transmission means for fault identification and/or performance evaluation purposes;

d) said handset being adapted to carry out test procedures on and in the vicinity of said system or assembly or component under test by interaction with said system or assembly or component under test through said signal transmission means;

characterised by

e) said apparatus being adapted to provide identification of a range of two or more faults in technically distinct areas by means of a single set of apparatus, at least two of said handsets being provided, each handset being adapted to provide a technically distinct analysis function applicable to at least two technically distinct areas of evaluation of the same or a different system or assembly or component under test, and each being adapted to provide its own technically distinct data stream to said base station through its signal transmission connection to said base station;

f) said base station being adapted to process said at least two technically distinct data streams provided from said at least two handsets to identify characteristics providing identification means for fault-tracing and/or performance evaluation purposes in said at least two technically distinct areas; and

g) said apparatus being adapted to employ said at least two handsets and said associated base station in sequence to provide said fault-tracing and/or performance evaluation on the same or different systems or assemblies or components in said at least two technically distinct areas by means of a single set of apparatus.

14. Apparatus according to claim 12 or claim 13 characterised by at least one of said handsets being adapted to effect battery evaluation and said apparatus being adapted to carry out the step of causing said at least one of said handsets to effect said battery evaluation by said signal transmission between the battery under test and said handset.

15. Apparatus according to claim 12 or claim 13 characterised by at least one of said handsets being adapted to effect brake evaluation and said apparatus being adapted to effect the step of causing said at least one of said handsets to effect said brake evaluation by said signal transmission between the brake or associated structure under test and said handset.

16. Apparatus according to claim 12 or claim 13 characterised by said at least one of said handsets being adapted to effect battery and/or starter system evaluation, and said apparatus comprising a Kelvin connection to connect to said battery and/or starter system.

17. Apparatus according to claim 12 or claim 13 characterised by at least one of said handsets being adapted to effect electrical system evaluation and said apparatus further comprising a temperature sensor to connect to said electrical system.

18. Apparatus according to claim 12 or claim 13 characterised by being adapted to carry out a test sequence comprising one or more tests selected from the group comprising self-testing and external battery testing and starter testing and vehicle running testing.

19. Apparatus according to claim 12 or claim 13 characterised by at least one of said handsets being adapted to effect tracing of intermittent wiring faults and said handset comprising a Kelvin connector to effect said test signal transmission between said handset and said system comprising a wiring fault, and the apparatus being adapted to applying a high pulse current to said system to determine the presence of a resistance fault of the order of less than one ohm.

20. Apparatus according to claim 12 or claim 13 characterised by at least one of said handsets being adapted to effect tracing of a fault in a circuit which is powered at all times, the apparatus comprising a Hall effect probe or an induction probe or an induction probe and being adapted to analyse current in one or more conductors of said circuit.

13. Apparatus for testing characterised by at least two handsets each adapted to provide a technically distinct analysis function and a corresponding data stream to a base station which is adapted to process said data streams to identify characteristics providing identification means for fault-tracing and/or performance evaluation purposes, the apparatus being adapted to employ said handsets to provide said functions in said technically distinct areas by means of a single set of apparatus.

21. Apparatus for testing applicable to the identification of faults and/or to the making of other routine tests in automotive vehicles and like electrical and/or electro-mechanical and/or hydro-mechanical systems or assemblies or components, the apparatus comprising:

a) a handset and signal transmission means for said handset adapted to effect test signal transmission between said handset and a system or assembly or component under test;

b) said handset being adapted to effect processing of test signals sensed and/or generated and/or induced in or by said signal transmission means for fault identification and/or performance evaluation purposes;

c) said handset being adapted to carry out test procedures on and in the vicinity of said system or assembly or component under test by interaction with said system or assembly or component under test through said signal transmission means;

characterised by

d) said handset being adapted to effect battery and/or starter system evaluation and the method comprising employing a Kelvin connection to said battery and/or starter system.

22. Apparatus for testing applicable to the identification of faults and/or to the making of other routine tests in automotive vehicles and like electrical and/or electromechanical and/or hydro-mechanical systems or assemblies or components, the apparatus comprising:

a) a handset and signal transmission means for said handset adapted to effect test signal transmission between said handset and a system or assembly or component under test;

b) said handset being adapted to effect processing of test signals sensed and/or generated and/or induced in or by said signal transmission means for fault identification and/or performance evaluation purposes;

c) said handset being adapted to carry out test procedures on and in the vicinity of said system or assembly or component under test by interaction with said system or assembly or component under test trough said signal transmission means;

characterised by

d) said handset being adapted to effect tracing of intermittent wiring faults and said handset comprising a Kelvin connector to effect said test signal transmission between said handset and said system comprising a fault and the apparatus being adapted to apply a high pulse current to said system to determine the presence of an impedance fault of relatively low value.