鲜茧茧层含水率与干壳量无损快速检测装置设计与试验

Design and Experiment of a Nondestructive and Fast Detecting Device for Moisture Content of Fresh Silkworm Cocoon Layer and Dried-Shell Weight

鲜茧茧层含水率与干壳量是桑蚕鲜茧评级的重要指标.基于LC振荡电路的鲜茧茧层含水率测量方法,搭建了鲜茧茧层含水率与干壳量无损检测的硬件平台,利用871×872、洞庭×碧波和两广二号3个品种鲜茧完成了水分传感器的标定,利用M1级的标准砝码和JJ1023BC型电子天平完成了称质量传感器的标定,在此基础上,完成了控制软件设计开发.试验表明,设计开发的无损快速检测装置检测鲜茧茧层含水率的相对误差小于0.96%,检测干壳量的相对误差小于2.04%,整个系统完成两个物理量检测的时间小于2min,实现了含水率和干壳量的无损快速检测.

The quality of fresh silkworm cocoons mainly depends on their moisture content and their driedshell weight.In an experiment reported in this paper,a method for measuring moisture content of fresh cocoon layer based on LC oscillator circuit was developed.A hardware system for nondestructive testing of the moisture content and the dried-shell weight was set up.The moisture sensor was calibrated by the fresh cocoons of three silkworm varieties（871×872,DONGTING×BIBO and LIANGGUANG No.2）.The weighing sensor was calibrated by standard weights of M1 and the JJ1023 BC electronic balance and,based on this,the software system was designed.The results showed the relative error for detecting moisture content of cocoon layer was less than 0.96%,and the relative error for detecting dried-shell weight was less than 2.04%.The detection time for this device was less than 2 min.It is,thus,concluded that we can evaluate the quality of fresh silkworm cocoons fast and nondestructively with this device whose cost is quite low.