Journal
HELIYON
Volume 6, Issue 8, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.heliyon.2020.e04555
Keywords
Electrical engineering; Energy; Industrial engineering; Control systems; Electrical system; Wireless network; Communication system; Capacitive detection; Parallel-plate electrode; Coplanar electrode
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Funding
- New Strategic Research (P2P) project (phase 2), Walailak University, Thailand
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In this study, we analyze a non-invasive and low-cost wood moisture meter by means of a capacitive detection circuit. The process of the design and development of an oil-palm-wood moisture meter is described. As part of the study, two electrode structures, i.e., parallel-plate and coplanar electrodes, are tested. The capacitive detection circuit includes a square-wave-generator circuit, low-pass filter circuit, and signal-conditioning circuit. The fre-quencies of the square-wave excitation signal are in the range of 200 kHz and are analyzed via a microcontroller to interpret the percentage of oil-palm-wood moisture content. The applicability of the capacitive moisture measurement is investigated under various moisture conditions of the oil palm wood i.e., 5%-20%. The exper-imental results show that the measurement accuracy of the detection circuit is high, with an acceptable mea-surement error.
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