Promising Directions for Sorting Seeds of Various Crops: Improving Electric Field Methods and Integrating Them with Modern Sensor Technologies
Keywords:
seed sorting, electric field, electrostatic separation, triangular electrodes, hybrid optical sorting, adaptive voltage control, cotton seedAbstract
Improving the germination capacity, purity, and uniformity of seed lots is a key task in seed production, yet pneumatic and mechanical sorting rely on only one or two physical traits, mass or size. This article reviews electric field sorting of agricultural seeds as an alternative that acts on several properties at once: mass, shape, density, electrical resistance, and dielectric permittivity. Published studies show that corona-discharge separation can improve seed purity and raise barley germination by 17.34%, and that an electrostatic separator can remove plastic film residue from seed cotton at up to 96.8% efficiency. Analysis of existing devices identifies a main limitation: electrode geometry is not matched to seed shape. To address this, a universal sorting device is proposed, with a polyethylene working body carrying screw-shaped channels and oppositely charged electrodes of triangular cross-section. Further directions are outlined: a hybrid electro-optical system combining electric field sorting with NIR/AI sensing, adaptive voltage control based on seed moisture, application to cotton seed cleaning, and sensor-based energy management. The proposed device and these directions are conceptual and still need experimental and numerical validation, for example by finite element modeling of the electric field.
References
Basiry M., Esehaghbeygi A. Cleaning and Charging of Seeds with an Electrostatic Separator // Applied Engineering in Agriculture. – 2012. – Vol. 28, No. 1. – P. 143-147. DOI: 10.13031/2013.41274.
2. Fattahi S.H., Abdollahpour S., Ghassemzadeh H., Behfar H., Mohammadi S.A. Sunflower's seed separation in high-intensity electric field // Agricultural Engineering International: CIGR Journal. – 2017. – Vol. 19, No. 2. – P. 193-199.
3. Seeds sorting by electrostatic separation: An experimental study // ResearchGate, 2004. – URL: https://www.researchgate.net/publication/4107765
4. Abdel-Salam M., El-Kishky H. va boshq. Wheat seeds separation in high-intensity electric field (ELSEP qurilmasi tavsifi) // ResearchGate.
5. Bühler Group. SORTEX Optical Sorting Machines. – URL: https://www.buhlergroup.com/global/en/process-technologies/Optical-Sorting.html
6. Li C., Li H., Liu Z., Li B., Huang Y. SeedSortNet: a rapid and highly efficient lightweight CNN based on visual attention for seed sorting // PeerJ Computer Science. – 2021. DOI: 10.7717/peerj-cs.639.
7. Design of mesh roller-type separator for machine-harvested seed cotton and film remnant // ResearchGate, 2021.
8. Rosaboyev A.T. Paxta xomashyosi uchqunlarini triboelektr qurilmada saralashning ilmiy va texnologik asoslari: Monografiya / A.T.Rosaboyev. – Toshkent: "Adabiyot uchqunlari", 2015. – 109 b.
9. Okulova V.A. Yozgi bug'doy urug'ini elektr maydonida ekishdan oldingi ishlov berish // Urug'chilik va parrandachilikda EIT apparatlari va vositalarini qo'llash. – Chelyabinsk, 1988. – 92-97 b.
