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Title: Detector for flow abnormalities in gaseous diffusion plant compressors

Abstract

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.

Inventors:
 [1];  [2]
  1. Loudon, TN
  2. Harriman, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
871634
Patent Number(s):
5767780
Assignee:
Lockheed Martin Energy Research Corporation (Oakridge, TN)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02H - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
F - MECHANICAL ENGINEERING F04 - POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS F04D - NON-POSITIVE-DISPLACEMENT PUMPS
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /340/324/

Citation Formats

Smith, Stephen F, and Castleberry, Kim N. Detector for flow abnormalities in gaseous diffusion plant compressors. United States: N. p., 1998. Web.
Smith, Stephen F, & Castleberry, Kim N. Detector for flow abnormalities in gaseous diffusion plant compressors. United States.
Smith, Stephen F, and Castleberry, Kim N. Thu . "Detector for flow abnormalities in gaseous diffusion plant compressors". United States. https://www.osti.gov/servlets/purl/871634.
@article{osti_871634,
title = {Detector for flow abnormalities in gaseous diffusion plant compressors},
author = {Smith, Stephen F and Castleberry, Kim N},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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