Distributed active mechanical waveguide sensor driven at multiple frequencies and including frequency-dependent reflectors
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United States of America Patent
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Jun 27, 2023
Grant Date -
May 6, 2021
app pub date -
Apr 10, 2018
filing date -
Apr 10, 2017
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Abstract
An active mechanical waveguide including an ultrasonically-transmissive material and a plurality of reflection points defined along a length of the waveguide may be driven at multiple resonant frequencies to sense environmental conditions, e.g., using tracking of a phase derivative. In addition, frequency-dependent reflectors may be incorporated into an active mechanical waveguide, and a drive frequency may be selected to render the frequency-dependent reflectors substantially transparent.
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