Author(s)

M. Krairiksh, J. Varith, A. Kanjanavapastit

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In this letter, we present a wireless sensor network for monitoring the maturity stage of fruit. A dual-polari- zation coupled patch sensor, which is robust to environmental changes, was designed to operate at 2.45 GHz. It was attached to a Durian fruit for a period of days to measure the magnitude of mutual coupling corresponding mainly to the starch concentration of its pulp. Signal was transmitted from a sensor node, via tree nodes, to a master node that displays the variations occurring in the period. The maximum mutual coupling occurred at the maturity stage of 60% whereas the minimum occurred at 70%. These results demonstrate that this wireless sensor network can enable fruit growers to harvest their Durians at an appropriate time, providing a reliable quality control for export.

Fruit Sensor, Maturity Stage Monitoring, Wireless Sensor Network, Pre-Harvest Control

M. Krairiksh, J. Varith and A. Kanjanavapastit, "Wireless Sensor Network for Monitoring Maturity Stage of Fruit," Wireless Sensor Network, Vol. 3 No. 9, 2011, pp. 318-321. doi: 10.4236/wsn.2011.39034.