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US 2006/0220655 A1Published application
Method and system for multi-frequency inductive ratio measurement
AssigneeGeneral Electric Company
InventorsScott Hoyte, Richard Slates
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Abstract
A method of testing a cable is provided. The method includes measuring at least one inductive ratio for the cable, determining an inductive gap from the at least one inductive ratio, measuring a parallel impedance of the cable, and determining a resistance of the cable based on the inductive gap and the parallel impedance.
Claims13
1-8. (canceled)
A method of testing a digital proximity system transducer cable for fluid intrusion, said method comprising:
- measuring three inductive ratio values for the cable, each inductive ratio measured at a different excitation frequency;
- averaging the inductive ratio values;
- determining an inductive gap from the at least one inductive ratio;
- measuring a parallel impedance of the cable substantially simultaneously with measuring the cable inductive ratio;
- and
- determining a resistance of the cable based on the inductive gap and the parallel impedance using a look-up table, the resistance being indicative of an amount of fluid intrusion into the cable.
3 more elements
A system for testing a cable, said system comprising:
- an eddy current transducer positioned in RF communication with a target, said transducer configured to generate an output signal relative to a gap distance;
- and
- a digital impedance measurement system configured to receive the output signal through a cable that is coupled in series with said transducer, said system further configured to measure an inductive ratio for the cable and transducer series combination at each of at least one predetermined frequency, said system comprising a memory that includes information that is relative to an inductive gap measurement and a parallel impedance gap measurement.
Dependencies are inferred from the claim text.