A fiber optic pressure transducer.
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Authors
Margerum, Gordon William
Subjects
fiber optics
pressure transducer
pressure transducer
Advisors
Fuhs, A.E.
Date of Issue
1972-06
Date
June 1972
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A pressure transducer with an outside diameter of 0.190"
has been built and statically tested. The transducer used a
glass fiber bundle 0.109" in diameter to transmit and receive
reflected light from a pressure diaphragm. The amount of
light returned to a photosensor was dependent upon the diaphragm
shape and relative position from the optic fiber
bundle. The response was linear over a pressure range which
was dependent upon the diaphragm thickness. Several fiber
optic probes with different fiber distributions were tested.
The random fiber distribution gave the greatest sensitivity.
However, with suitable choice of gain selection, pressure
range could be sacrificed for increased pressure resolution
for any combination of fiber distribution and diaphragm
thickness.
A theory was developed for a coaxial fiber distribution
with the source light transmitted by the inner circle of
fibers and operating with reflection from a flat surface.
The theory provided a response curve shape which compared
with the measured response.
Type
Thesis
Description
Series/Report No
Department
Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.