Detector for flow abnormalities in gaseous diffusion plant compressors

Patent · Thu Jan 01 00:00:00 EST 1998

OSTI ID:871634

Smith, Stephen F ^[1]; Castleberry, Kim N ^[2]

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1. Loudon, TN
2. Harriman, TN

A detector detects a flow abnormality in a plant compressor which outputs a motor current signal. The detector includes a demodulator/lowpass filter demodulating and filtering the motor current signal producing a demodulated signal, and first, second, third and fourth bandpass filters connected to the demodulator/lowpass filter, and filtering the demodulated signal in accordance with first, second, third and fourth bandpass frequencies generating first, second, third and fourth filtered signals having first, second, third and fourth amplitudes. The detector also includes first, second, third and fourth amplitude detectors connected to the first, second, third and fourth bandpass filters respectively, and detecting the first, second, third and fourth amplitudes, and first and second adders connected to the first and fourth amplitude detectors and the second and third amplitude detectors respectively, and adding the first and fourth amplitudes and the second and third amplitudes respectively generating first and second added signals. Finally, the detector includes a comparator, connected to the first and second adders, and comparing the first and second added signals and detecting the abnormal condition in the plant compressor when the second added signal exceeds the first added signal by a predetermined value.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Lockheed Martin Energy Research Corporation (Oakridge, TN)
• Patent Number(s): US 5767780
• OSTI ID: 871634
• Country of Publication: United States
• Language: English

Related Subjects

detector
flow
abnormalities
gaseous
diffusion
plant
compressors
detects
abnormality
compressor
outputs
motor
current
signal
demodulator
lowpass
filter
demodulating
filtering
producing
demodulated
third
fourth
bandpass
filters
connected
accordance
frequencies
generating
filtered
signals
amplitudes
amplitude
detectors
respectively
detecting
adders
adding
added
finally
comparator
comparing
abnormal
condition
exceeds
predetermined
value
pass filters
bandpass filter
modulated signal
motor current
predetermined value
current signal
detector detects
bandpass filters
pass filter
gaseous diffusion
signal producing
abnormal condition
filtered signal
normal condition
plant compressor
diffusion plant
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