The static experience about the absorption of y - rays by different grains has been made . furthermore we made the dynamic calibrating and testing experience for two kinds of systems , analyzed and compared the precisions of two methods , and found some correlation factor of affecting measurement precision 针对两种方法设计研制了两套实用的面向康拜因的谷物流量在线测量试验系统，并在此基础上对两种测量方法进行了动态试验与精度分析比较，找出了影响测量精度的多种相关因素，给出了确定性结论。
