针刺式谷物含水率检测仪设计

Design of needle-typed moisture content detecting instrument of grains

为了提高谷物含水率在线检测的精确度和速度,更好地满足烘干机械在线检测的要求,设计了一种直接刺入谷物籽粒的对称针形含水率检测传感器;并配合高精度检测电路与优化算法,设计了相应的系统检测装置。试验结果显示,该装置对稻谷含水率的测量误差不大于1%,单次测量响应时间小于2s。通过简单的参数设定,该装置即可应用于不同种类谷物的水分检测。该检测方法的提出为谷物含水率在线测量提供了新的解决方案。

In order to enhance the speed and precision of grain moisture content measurement, and to satisfy the need of online de teetion of drying machinery, a new symmetric needle typed moisture content sensor which direct thrust into the grain was proposed, which was cooperated with high precision testing circuit and optimi- zation algorithm, and the corresponding new equipment was designed. The trial results indicated that the error of paddy moisture content measurement was no more than 1% and the response time was less than 2 s. Through simple parameters setting, this equipment could he applied to measure moisture content of other grains. Through this new method, a new online measurement scheme was put forward.