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Title: Acoustic emission monitoring system

Abstract

Methods and apparatus for identifying the source location of acoustic emissions generated within an acoustically conductive medium. A plurality of acoustic receivers are communicably coupled to the surface of the medium at a corresponding number of spaced locations. The differences in the reception time of the respective sensors in response to a given acoustic event are measured among various sensor combinations prescribed by the monitoring mode employed. Acoustic reception response encountered subsequent to the reception by a predetermined number of the prescribed sensor combinations are inhibited from being communicated to the processing circuitry, while the time measurements obtained from the prescribed sensor combinations are translated into a position measurement representative of the location on the surface most proximate the source of the emission. The apparatus is programmable to function in six separate and five distinct operating modes employing either two, three or four sensory locations. In its preferred arrangement the apparatus of this invention will re-initiate a monitoring interval if the predetermined number of sensors do not respond to a particular emission within a given time period.

Inventors:
 [1]
  1. Richland, WA
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
862878
Patent Number(s):
4033179
Assignee:
Westinghouse Electric Corporation (Pittsburgh, PA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
acoustic; emission; monitoring; methods; apparatus; identifying; source; location; emissions; generated; acoustically; conductive; medium; plurality; receivers; communicably; coupled; surface; corresponding; spaced; locations; differences; reception; time; respective; sensors; response; event; measured; various; sensor; combinations; prescribed; mode; employed; encountered; subsequent; predetermined; inhibited; communicated; processing; circuitry; measurements; obtained; translated; position; measurement; representative; proximate; programmable; function; six; separate; five; distinct; operating; modes; employing; sensory; preferred; arrangement; re-initiate; interval; respond; particular; period; acoustic receiver; processing circuitry; time period; acoustic emission; acoustic emissions; conductive medium; measurements obtained; spaced locations; operating modes; source location; emissions generated; time measurement; time measurements; operating mode; various sensor; acoustically conductive; /73/367/702/

Citation Formats

Romrell, Delwin M. Acoustic emission monitoring system. United States: N. p., 1977. Web.
Romrell, Delwin M. Acoustic emission monitoring system. United States.
Romrell, Delwin M. Tue . "Acoustic emission monitoring system". United States. https://www.osti.gov/servlets/purl/862878.
@article{osti_862878,
title = {Acoustic emission monitoring system},
author = {Romrell, Delwin M},
abstractNote = {Methods and apparatus for identifying the source location of acoustic emissions generated within an acoustically conductive medium. A plurality of acoustic receivers are communicably coupled to the surface of the medium at a corresponding number of spaced locations. The differences in the reception time of the respective sensors in response to a given acoustic event are measured among various sensor combinations prescribed by the monitoring mode employed. Acoustic reception response encountered subsequent to the reception by a predetermined number of the prescribed sensor combinations are inhibited from being communicated to the processing circuitry, while the time measurements obtained from the prescribed sensor combinations are translated into a position measurement representative of the location on the surface most proximate the source of the emission. The apparatus is programmable to function in six separate and five distinct operating modes employing either two, three or four sensory locations. In its preferred arrangement the apparatus of this invention will re-initiate a monitoring interval if the predetermined number of sensors do not respond to a particular emission within a given time period.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {7}
}

Patent:

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