Plugged impulse line detection

Details Plugged impulse line detection Plugged impulse line detection

2006-02-06

2009-08-18

Tsai, Carol S (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Pressure

C702S006000, C702S183000, C073S706000, C073S707000, C073S708000, C073S716000, C340S611000

Reexamination Certificate

active

07577543

ABSTRACT:
A digital signal representative of a difference in pressure is received from a differential pressure transmitter. A noise signal is obtained by processing the signal through a band pass filter or otherwise to provide a filtered noise signal. Absolute values of the filtered noise signal are calculated and compared to one or more predetermined threshold values to determine if one or more impulse lines are plugged. A training mode is used to determine the thresholds, which may be a function of flow rate and other flow conditions.

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