In this paper we propose acoustic power transfer as a method for the remote powering of pipeline sensor nodes. A theoretical framework of acoustic power propagation in the ceramic transducers and the metal structures is drawn, based on the Mason equivalent circuit. The effect of mounting on the electrical response of piezoelectric transducers is studied experimentally. Using two identical transducer structures, power transmission of 0.33 mW through a 1 m long, 118 mm diameter cast iron pipe, with 8 mm wall thickness is demonstrated, at 1 V received voltage amplitude. A nearlinear relationship between input and output voltage is observed. These results show that it is possible to deliver significant power to sensor nodes through acoustic waves in solid structures. The proposed method may enable the implementation of acousticpowered wireless sensor nodes for structural and operation monitoring of pipeline infrastructure.

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http://dx.doi.org/10.1088/1742-6596/660/1/012095 under the license cc-by
https://academic.microsoft.com/#/detail/2288629058 under the license http://iopscience.iop.org/info/page/text-and-data-mining
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Published on 01/01/2015

Volume 2015, 2015
DOI: 10.1088/1742-6596/660/1/012095
Licence: Other

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