Abstract
This study starts with the principles of the variable dielectric-type cylindrical capacitive sensor, conducts the theoretical analysis after dielectric is divided into three phases (solid, liquid and gas), determines the relation between dielectric constant and other influence factors through the least squares fitting method, makes compensation for such factors as temperature, grain variety and air void ratio, builds the mathematical model of grain moisture content(GMC) through the variable dielectric-type cylindrical capacitive sensor, and suggests the capacitance measurement method based on pulse-width modulation. The experiment result shows that the suggested capacitance measurement method can accurately measure micro-(pF-class) capacitance, and the theoretical value of GMC as produced by this mathematical model falls within an allowable error range when compared to actual value, so this model proves to be rational.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.