Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 102, Issue 1-2, Pages 61-66Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0924-4247(02)00342-4
Keywords
inductive coupling; remote query; strain sensor; non-destructive evaluation
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This paper presents a non-contact, wireless, passive, inductively coupled strain sensor. The sensor itself is a parallel-connected LC tank circuit. Small geometric changes in a stressed solenoidal inductor were predicted to affect its inductance and as a consequence the resonant frequency of the LC circuit. Using a gate dip meter as a sensitive detector, this was experimentally confirmed. There was found to be a consistent relationship between relative strain with shifted resonant frequency independent of whether the sensor was embedded or not. Crown Copyright (C) 2002 Published by Elsevier Science B.V. All rights reserved.
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