中文摘要：

为了实时获取土壤表面粗糙度数据,设计了一种基于激光三角测距原理的土壤表面粗糙度专用测量装置。采用激光扫描测距仪测量微位移,其精度高、响应速度快,测距分辨力高达0.1 mm,显著提高了土壤表面粗糙度的测量精度;借助于光电编码盘和螺杆组合实现高精度扫描定位;PDA作为上位机,农田环境下具有方便携带,大容量存储数据和智能化实时处理功能等优点。

英文摘要：

Soil surface roughness has been widely used for characterizing soil surface profile.To rapidly measure soil surface roughness in situ,a laser scanner is developed based on triangulation principle.Compared with traditional instruments,this device has higher measurement resolution（0.1mm）,precision positioning ability（1mm）,and efficiency.A PDA（personal digital assistant） is used as data-logger,which can meet the requirements of portability,large data memory,and real-time data processing in field.