Research on the Method of Seed Water Content Measurement Based on Electromagnetic Induction

Abstract

There exist some problems that the water content of the test object cannot be reflected in real time. The detection time is too long, and the heating measurement method destroys the seed tissue for the traditional measurement of the water content of the seed. In this paper, a structure of single excitation coil to double receiving coils is proposed to measure the water content of the seed via electromagnetic induction. The relative permittivity of the seed can be obtained by the relationship between the amplitude ratio and the water content of the seed. First of all, according to the electromagnetic field theory, the functional relationship between the amplitude ratio of the electromotive force amplitude signals of the two receiving coils and the water content of the seed is established. Secondly, fifty sets of theoretical values of the mentioned model can be obtained through simulation analysis. Finally, comparative tests are carried out by using soybean seeds. The experimental results preliminarily verify the feasibility of the electromagnetic measurement method of the water content of the seed. The advantage of the proposed method is that the measurement of the water content of the seed is non-contacting.

Assessment of Ball Milling as a Compounding Technique to Develop Nanocomposites of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) and Bacterial Cellulose Nanowhiskers

“…The use of nanoparticles is attractive because they can act as nucleating agents, not only improving the polymer crystallization rates, but also increasing the mechanical, thermal and/or barrier performance of the composites. For instance, inorganic nano-fillers such as carbon nanotubes [2] and nanoclays [3,4] have demonstrated to increase the crystallization rate of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), and enhance the stiffness and thermal stability of the nanocomposites. Moreover, improvements on the barrier properties of PHBV upon addition of nanoclays have also been reported with reductions of 76% and 32% in water and oxygen permeability respectively using 5 wt.% of filler [5].…”

Research on Efficiency Optimization of Rail Transit Wireless Power Transmission System Based on Electromagnetic Detection

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