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Title: Portable microwave instrument for non-destructive evaluation of structural characteristics

Abstract

A portable microwave instrument for evaluating characteristics of a structural member includes a source of microwave energy, a transmitter coupled to the source of microwave energy for transmitting a microwave signal at the structural member, and a receiver positioned on the same side of the structural member as the transmitter and being disposed to receive a microwave signal reflected by the structural member. A phase angle difference is determined between the transmitted microwave signal and the received microwave signal using a signal splitter and a balanced mixer. The difference in phase angle varies in accordance with differences in size, shape and locations of constituent materials within the structural member.

Inventors:
 [1];  [2];  [3];  [4]
  1. Clinton, TN
  2. Knoxville, TN
  3. Oak Ridge, TN
  4. Loudon, TN
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
869721
Patent Number(s):
5384543
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
portable; microwave; instrument; non-destructive; evaluation; structural; characteristics; evaluating; source; energy; transmitter; coupled; transmitting; signal; receiver; positioned; disposed; receive; reflected; phase; angle; difference; determined; transmitted; received; splitter; balanced; mixer; varies; accordance; differences; size; shape; locations; constituent; materials; structural characteristics; microwave signal; phase angle; microwave energy; wave energy; non-destructive evaluation; wave signal; receiver positioned; microwave instrument; transmitter coupled; portable microwave; constituent material; /324/

Citation Formats

Bible, Don W, Crutcher, Richard I, Sohns, Carl W, and Maddox, Stephen R. Portable microwave instrument for non-destructive evaluation of structural characteristics. United States: N. p., 1995. Web.
Bible, Don W, Crutcher, Richard I, Sohns, Carl W, & Maddox, Stephen R. Portable microwave instrument for non-destructive evaluation of structural characteristics. United States.
Bible, Don W, Crutcher, Richard I, Sohns, Carl W, and Maddox, Stephen R. Sun . "Portable microwave instrument for non-destructive evaluation of structural characteristics". United States. https://www.osti.gov/servlets/purl/869721.
@article{osti_869721,
title = {Portable microwave instrument for non-destructive evaluation of structural characteristics},
author = {Bible, Don W and Crutcher, Richard I and Sohns, Carl W and Maddox, Stephen R},
abstractNote = {A portable microwave instrument for evaluating characteristics of a structural member includes a source of microwave energy, a transmitter coupled to the source of microwave energy for transmitting a microwave signal at the structural member, and a receiver positioned on the same side of the structural member as the transmitter and being disposed to receive a microwave signal reflected by the structural member. A phase angle difference is determined between the transmitted microwave signal and the received microwave signal using a signal splitter and a balanced mixer. The difference in phase angle varies in accordance with differences in size, shape and locations of constituent materials within the structural member.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

Patent:

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