Method and apparatus for measuring a parameter of a vehicle electrical system

  • US 8,674,711 B2
  • Filed: 12/19/2006
  • Issued: 03/18/2014
  • Est. Priority Date: 09/05/2003
  • Status: Active Grant
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First Claim
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1. An apparatus for measuring an electrical parameter of an electrical path in a vehicle, comprising:

  • a first Kelvin connector having a first load connection and a first sense connection configured to electrically couple to a first location of an electrical system of the vehicle;

    a second Kelvin connector having a second load connection and a second sense connection configured to electrically couple to a second location of the electrical system of the vehicle;

    a third connector configured to electrically couple to a third location of the electrical system of the vehicle;

    a fourth connector configured to electrically couple to a fourth location of the electrical system of the vehicle;

    a forcing function source configured to apply a forcing function signal between the first load connecting of the first Kelvin connector and the second load connecting of the second Kelvin connector, the forcing function signal comprising a time varying signal; and

    a microprocessor which measures a first electrical dynamic parameter between the first Kelvin connector and the third connector, a second electrical dynamic parameter between the third connector and the fourth connector, and responsively provides an output representing electrical resistance between the third connector and the first Kelvin connector based upon the first and second dynamic parameters, wherein the first and second electrical dynamic parameters comprise voltages which are generated in response to the applied forcing function.

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