一、引言 水稻子粒的几何特征以它的几何尺寸表示,即长度1,宽度b,厚度a。如图1所示。该几何特征为水稻子粒物理机械特性之一,是谷物播种机械及谷物清选机械等作物机械的基本设计参数之一。水稻为我国主要粮食作物之一,为此搞清我 I. INTRODUCTION The geometrical characteristics of rice grains are expressed in terms of their geometric dimensions, namely length 1, width b, and thickness a. As shown in Figure 1. This geometric feature is one of the physical and mechanical properties of rice grains and one of the basic design parameters of crop machinery such as grain sowing machinery and grain clearing machinery. Rice is one of the main food crops in our country, so I can understand it