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:
-
- Clinton, TN
- Knoxville, TN
- Oak Ridge, TN
- Loudon, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 869721
- Patent Number(s):
- 5384543
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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 = {Sun Jan 01 00:00:00 EST 1995},
month = {Sun Jan 01 00:00:00 EST 1995}
}
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