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。

On the basis of the principle of laser scan, the counting method for different board articles which are piled in layers, irregular, and with coloured or black to white surfaces, is studied. By traditional methods the counting of these articles is difficult to do or have limited precision and counting rate. The counting principle, the determination of the positions of the incident laser beam and of the installation of the sensors, the measuring system, and the experimental results are presented.