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Title: Detached rock evaluation device

Abstract

A rock detachment evaluation device (10) having an energy transducer unit 1) for sensing vibrations imparted to a subject rock (172) for converting the sensed vibrations into electrical signals, a low band pass filter unit (12) for receiving the electrical signal and transmitting only a low frequency segment thereof, a high band pass filter unit (13) for receiving the electrical signals and for transmitting only a high frequency segment thereof, a comparison unit (14) for receiving the low frequency and high frequency signals and for determining the difference in power between the signals, and a display unit (16) for displaying indicia of the difference, which provides a quantitative measure of rock detachment.

Inventors:
 [1]
  1. Golden, CO
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
OSTI Identifier:
865910
Patent Number(s):
4598588
Assignee:
United States of America as represented by Secretary of Interior (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01H - MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
detached; rock; evaluation; device; detachment; 10; energy; transducer; unit; sensing; vibrations; imparted; subject; 172; converting; sensed; electrical; signals; band; pass; filter; 12; receiving; signal; transmitting; frequency; segment; 13; comparison; 14; determining; difference; power; display; 16; displaying; indicia; provides; quantitative; measure; frequency signals; band pass; electrical signals; electrical signal; pass filter; frequency signal; energy transducer; display unit; filter unit; sensing vibrations; quantitative measure; evaluation device; /73/

Citation Formats

Hanson, David R. Detached rock evaluation device. United States: N. p., 1986. Web.
Hanson, David R. Detached rock evaluation device. United States.
Hanson, David R. Wed . "Detached rock evaluation device". United States. https://www.osti.gov/servlets/purl/865910.
@article{osti_865910,
title = {Detached rock evaluation device},
author = {Hanson, David R},
abstractNote = {A rock detachment evaluation device (10) having an energy transducer unit 1) for sensing vibrations imparted to a subject rock (172) for converting the sensed vibrations into electrical signals, a low band pass filter unit (12) for receiving the electrical signal and transmitting only a low frequency segment thereof, a high band pass filter unit (13) for receiving the electrical signals and for transmitting only a high frequency segment thereof, a comparison unit (14) for receiving the low frequency and high frequency signals and for determining the difference in power between the signals, and a display unit (16) for displaying indicia of the difference, which provides a quantitative measure of rock detachment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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