Observation and analysis of motion rule of free kernel in threshing and separating space

The motion conditions of free kernel in the threshing and separating space were photographed on line by the high-speed photography. By observing and analyzing the reproduction of the pictures, the motion of free kernel is unstable in the majority condition. They are always collided by the threshing parts, stalks. etc and the motion velocity and trace are often changed. The motion trace will a straight-line if it is not disturbed by external condition.