Research on the Influence Factors of Ultrasonic Measurement System of Tree Canopy Volume
Measurement of tree canopy volume can provide important reference for variable rate spraying, so a new measurement method of canopy volume was designed and an automatic measurement system of canopy volume based on the ultrasonic sensors was developed. The principle of canopy volume measurement was that the tree canopy volume was defined as the sum of six column volumes. The measurement system was composed of ultrasonic sensors, single chip unit, step motor, guide rail, mast, and portable computer. Experimental result showed that the measurement results of canopy volumes werent influenced by the relative velocity between the ultrasonic sensors and the experimental objects significantly, and the measurement results were influenced by the wind direction significantly while werent influenced by the wind velocity significantly.
Tree Canopy Volume Ultrasonic Sensor Relative Velocity Wind Direction and Velocity
Kaiqun Hu Zetian Fu Ronghua Ji Jun Wang Lijun Qi
College of Engineering, China Agriculture University, Beijing, 100083, P. R. China College of Electric and Information Engineering, China Agriculture University, Beijing, 100083, P. R Chinese Academy of Agricultural Mechanization Sciences, Beijing, 100083, P. R. China
国际会议
南昌
英文
1220-1224
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）