WSN  Vol.3 No.9 , September 2011
Wireless Sensor Network for Monitoring Maturity Stage of Fruit
Abstract: 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.
Cite this paper: nullM. 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.

[1]   P. Lertrut, B. Rattanachinakorn, S. Vijitranont, S. Suthiarom, S. Pavenakarn, H. Hirunpradit, S. Juntarapun- nik, and S. Sluck-petch, Durian (in Thai), Ministry of Ag- riculture and Coopera-tive, No.13/2547, 2003.

[2]   K. Kalayanamitra, “Evaluation and Classification of Durian Fruit Maturity and its Relationship with Chemical Constituents,” Thai Journal of Agricultural Science, Vol. 38, No. 1-2, 2005, pp.45-54.

[3]   S. Ketsa and T. Dangkanit, “Firmness and Activities of Poly-galacturonase, Pertinesterase, ?-Galactosidase and Cellulose in Ripening Durian Harvested at Different Stages of Maturity,” Scientia Horticulture, 1999, pp. 184-188.

[4]   T. Rutpralom, K. Chamnongthai, and P. Kumhom, “Non- de-structive Durian Maturity Determination by Using Mi- crowave Free Space Measurement,” IEEE International Symposium on Circuits and Systems, Thailand, 2006, pp. 441-444.

[5]   S. Suttapa, J. Varith, M. Krairiksh, C. Noochuay, and J. Phim-pimol, “Microwave Sensor Response in Relation to Durian Maturity,” Proceedings of the 5th CIGR Section VI International Symposium on Food Processing and Moni- toring Technology in Bioprocesses and Food Quality Management, Potsdam, Germany, September 2009.

[6]   T. Motwani, K. Seetharaman, and R. C. Anantheswaran, “Di-electric Properties of Starch Slurries as Influenced by Starch Concentration and Gelatinization,” Carbohydrate Polymers, Vol. 67, 2007, pp. 73-79.

[7]   X. Liao, G. S. V.Raghavan, J. Dai, and V. A. Yaylayan, “Di-electric Properties of -D-Glucose Aqueous Solu- tions at 2450 MHz,” Food Research International, Vol. 36, 2003, pp. 485-490.

[8]   CST Microwave Studio User’s Manual 2006.

[9]   M. Krairiksh, J. Varith, A. Kanjanavapastit, C. Phong- cha-roenpanich, A. Thanachayanont, P. Sirisuk and M. Chong-cheawchamnan, “Microwave Sensor for Durian Inspection,” Proceedings of 2009 IEEE International Con- ference on An-tennas, Propagation and Systems (INAS 2009), Johor, Dec. 2009, pp.221-1-221-4.

[10]   C. Intanagonwiwat, R. Govindan, and D. Estrin, “Di- rected Diffusion: A Scalable and Robust Communication Paradigm for Sensor Networks,” Proceedings of the 6th Annual International Conference on Mobile Computing and Networking, Boston, Massachusetts, 2000, pp. 56-67.