基于角度传感器的树木胸径测量装置研制

Development and Testing of a Tree Breast Diameter Measuring Device Based on Angle Sensors

为了实现树木胸径高精度数字化测量,在分析角度传感器原理的基础上,研制了一款基于角度传感器的树木胸径测量装置,结合安卓端上位机实现了数据存储、编辑和上传等功能。野外试验表明:与围尺、卡尺测量结果比较,偏差(BIAS)分别为-0.17 cm(-0.89%)、0.09 cm(0.52%),均方根误差(RMSE)分别为0.39 cm(2.07%)、0.42 cm(2.25%);8个树种间胸径测量精度达98%。与传统测量方法相比较,无需人工读取、录入数据,在森林资源调查上有广阔的应用前景。

In order to achieve high-precision digital measurement of tree diameter at breast height(DBH),we developed a DBH measurement device based on angle sensors,which paired with the android software application via bluetooth for storage,editing and uploading DBH data automatically.This new device is portable and which was used to measure eight species of trees to assess its accuracy here,and the field tests show that:compared with diameter tapes,the DBH measurements have a-0.17 cm(-0.89%)bias and 0.39 cm(2.07%)root mean square error(RMSE);compared with calipers,the DBH measurements have a 0.09 cm(0.52%)bias and 0.42 cm(2.25%)root mean square error(RMSE).The mean accuracy of DBH reaches 98%between eight tree species.Moreover,there is no need to manually read and input data,and it has broad application prospects in forestry resource inventory.