食品与机械2025，Vol.41Issue(4)：97-104,8.DOI:10.13652/j.spjx.1003.5788.2024.80983
一种适用于粮食烘干机的多导体阵列式电容装置及其测量分析
A multi-conductor array capacitor device for grain dryers and its measurement analysis
摘要
Abstract
[Objective]To address the limitations of traditional single-point moisture measurement in complex drying environments,a multi-conductor array capacitor device was designed for moisture content measurement inside a grain dryer.[Methods]An array of 8 conductor rods was arranged to measure the capacitance between each pair of adjacent rods,from which the average dielectric constant in the inter-rod regions was calculated to enable real-time moisture monitoring during the grain drying process.[Results]High-precision capacitance measurements were achieved using an FDC2214 capacitive sensor controlled by a Raspberry Pi Pico W.The relationship between the dielectric constant in regions with varying moisture content and the corresponding water weight was validated,generating a two-dimensional dielectric constant distribution map.In environments with uneven humidity distribution,the device rapidly and stably detected moisture diffusion and accurately fitted the improved Dobson model.During the fitting process,the maximum standard deviation of the dielectric constant was 3.98,with an average value of 1.27.[Conclusion]By adjusting the physical structure of the test setup,the device can measure the average moisture distribution in any spatial unit of grain.关键词
粮食烘干机/电容传感器/水分测量/多导体阵列/介电常数Key words
grain dryer/capacitive sensor/moisture measurement/multi-conductor array/dielectric constant引用本文复制引用
刘聪,刘珏,陈达畅,方焯..一种适用于粮食烘干机的多导体阵列式电容装置及其测量分析[J].食品与机械,2025,41(4):97-104,8.基金项目
湖北省农机装备补短板核心技术应用攻关项目(编号:HBSNYT202222) （编号:HBSNYT202222）
