Magnetostrictive type strain sensing means and methods
First Claim
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1. A method of monitoring strain at a designated location in a composite substructure comprising a solid dielectric material, comprising the steps of:
- fixing a magnetostrictive material layer to the composite substructure;
bringing a transmission coil into proximity with the magnetostrictive material;
bringing a receiver coil into proximity with the magnetostrictive material;
applying an electrical signal across the transmission coil over a range of frequencies; and
monitoring a frequency near a resonant frequency and having a near minimum detected signal strength across the receiver coil to determine changes in strain of the composite substructure.
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Abstract
A strain gauge including: a system including a transmission coil, a magnetostrictive material layer and a receiver coil wherein an alternating transmission signal is applied across the transmission coil and an induced signal is induced in the receiver coil, the intensity of the detected signal across the receiver coil being a measurement of strain, wherein frequency of transmission signal is near to a resonance frequency of the system.
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3 Claims
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1. A method of monitoring strain at a designated location in a composite substructure comprising a solid dielectric material, comprising the steps of:
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fixing a magnetostrictive material layer to the composite substructure; bringing a transmission coil into proximity with the magnetostrictive material; bringing a receiver coil into proximity with the magnetostrictive material; applying an electrical signal across the transmission coil over a range of frequencies; and monitoring a frequency near a resonant frequency and having a near minimum detected signal strength across the receiver coil to determine changes in strain of the composite substructure. - View Dependent Claims (2, 3)
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Specification