For automatic measuring the plant growth increment, a optical architectonics based on laser collimating light source and linear CCD is adopted.

• 为了能够自动测量植物生长增量,采用了一种基于激光准直光源加线阵电荷耦合器件(CCD)的光路结构,提出了一种用数字电位器来控制二值化电路的方法。