介绍了基于激光扫描原理，对叠放在一起、形状不规则、表面有色彩或黑度深浅不一的板状物品进行计数的方法。介绍了这种计数方法的原理、激光束入射位置和传感器安装位置的确定、测试系统的组成以及测试结果。 Based on the principle of laser scanning, a method of counting plate-shaped objects stacked together, irregularly shaped, with different shades or blackness on the surface is introduced. The principle of this counting method, the location of the laser beam incident and the installation position of the sensor, the composition of the test system and the test results are introduced.