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Sensors 2019, 19(6), 1366; https://doi.org/10.3390/s19061366

In-Vivo Vibroacoustic Surveillance of Trees in the Context of the IoT

1
Department of Music Technology & Acoustics, Technological Educational Institute of Crete, 71410 Heraklion, Greece
2
Department of Electrical and Electronics Engineering, University of West Attica, 12241 Athens, Greece
*
Author to whom correspondence should be addressed.
Received: 13 February 2019 / Revised: 1 March 2019 / Accepted: 12 March 2019 / Published: 19 March 2019
(This article belongs to the Section Remote Sensors)
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Abstract

This work introduces a device for long term systematic monitoring of trees against borers. A widely applied way to detect wood-boring insects is to insert a piezoelectric probe with an uncoated waveguide in the tree trunk and listen for locomotion or feeding sounds through headphones. This approach has several shortcomings: (a) frequent manual inspection of trees is costly and impractical to scale to hundreds or thousands of trees, (b) the larvae could be present but inactive during the inspection time and, (c) when the trees are in urban environments the background noise can be significant and can mask the feeble sounds of wood-boring insects even with the use of specialized headphones. We introduce a remotely controlled device that records and wirelessly transmits on a scheduled basis short recordings of the internal vibrations of a tree to a server. The user can listen remotely or process the recording automatically to infer the infestation state of the tree with wood-boring insects that feed or move inside the tree. When integrated within the IoT framework this device can scale up to automatically monitoring the trees of the entire city. The proposed approach led to detection results in field trials of the pests Xylotrechus chinensis (Chevrolat) (Cerambycidae) and Rhynchophorus ferrugineus Olivier (Coleoptera: Curculionidae). View Full-Text
Keywords: Xylotrechus chinensis; Rhynchophorus ferrugineus; precision agriculture; IoT Xylotrechus chinensis; Rhynchophorus ferrugineus; precision agriculture; IoT
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Potamitis, I.; Rigakis, I.; Tatlas, N.-A.; Potirakis, S. In-Vivo Vibroacoustic Surveillance of Trees in the Context of the IoT. Sensors 2019, 19, 1366.

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