Method and apparatus for measuring impedance across pressure...

Details Method and apparatus for measuring impedance across pressure... Method and apparatus for measuring impedance across pressure...

G - Physics

01

R

G01R 27/08 (2006.01) G01R 27/20 (2006.01) G01R 31/04 (2006.01) G01R 31/08 (2006.01)

Patent

CA 2477606

The difference in voltages measured upstream and downstream of a pressure junction in a power distribution system produced by the energizing power is divided by the measured current to calculate a value that is a function of the impedance of the pressure junction, which is monitored for deterioration. To eliminate noise resulting from dividing a small number by a large number and transients in the power distribution system, the impedance is calculated from the squares of the voltage differences and currents for a large number of samples, and the change between successive calculations is limited to produce a stable median value.

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