葵花籽含水率无损检测仪的设计与试验

为了实现对葵花籽含水率的快速、准确检测,采用非接触式平行板电容法对不同含水率水平的葵花籽在不同的温度和频率范围内的介电特性进行研究,建立了描述含水率、温度和介电常数的数学模型,验证了基于介电常数检测葵花籽含水率的可行性和模型的可靠性,并设计了一种能够按预定频率快速可靠地检测葵花籽含水率的装置.试验结果表明:葵花籽含水率...

Design and Test of a Non-destructive Measuring Instrument for Sunflower Seed Moisture Content

In order to achieve a rapid and accurate measuring instrument for sunflower seeds moisture content.In this paper,a non-contact parallel plate capacitance method is used to study the dielectric properties of sunflower seeds with different moisture content levels in different temperature and frequency ranges.The dielectric properties are studied a mathematical model describing moisture content,temperature and dielectric constant was established,and the feasibility of detecting the moisture content of sunflower seeds based on the dielectric constant and the reliability of the model were verified,and a measuring instrument for sunflower seed moisture content that could be fast and reliable at a predetermined frequency was designed.The results show that the design of sunflower seed moisture content detection device has an average absolute error of less than 0.95%in the temperature range of 10°-40℃and the moisture content 6%-20%w.b.range,which verifies the accuracy and reliability of the moisture content detection device.It provides technical support for the drying,safe storage and quality control for sunflower seeds.