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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. 6 figures.

Inventors:
; ; ;
Issue Date:
OSTI Identifier:
6647693
Patent Number(s):
5384543 A
Application Number:
PPN: US 7-972776
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Patent File Date: 9 Nov 1992
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; MECHANICAL STRUCTURES; NONDESTRUCTIVE TESTING; PORTABLE EQUIPMENT; RADIOMETERS; MICROWAVE RADIATION; RADIATION SOURCES; ELECTROMAGNETIC RADIATION; EQUIPMENT; MATERIALS TESTING; MEASURING INSTRUMENTS; RADIATION DETECTORS; RADIATIONS; TESTING; 420500* - Engineering- Materials Testing

Citation Formats

Bible, D W, Crutcher, R I, Sohns, C W, and Maddox, S R. Portable microwave instrument for non-destructive evaluation of structural characteristics. United States: N. p., 1995. Web.
Bible, D W, Crutcher, R I, Sohns, C W, & Maddox, S R. Portable microwave instrument for non-destructive evaluation of structural characteristics. United States.
Bible, D W, Crutcher, R I, Sohns, C W, and Maddox, S R. Tue . "Portable microwave instrument for non-destructive evaluation of structural characteristics". United States.
@article{osti_6647693,
title = {Portable microwave instrument for non-destructive evaluation of structural characteristics},
author = {Bible, D W and Crutcher, R I and Sohns, C W and Maddox, S 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. 6 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}