1Research on the Accuracy and Applicability of the Measurement Method of Tree Canopy Volume Based on Ultrasonic Sensors

作者： Fu, Zetian; Qi, Lijun; Hu, Kaiqun; Ji, Ronghua; Wang, Jun; SCI

机构： China Agr Univ, Coll Engn, Beijing 100083, Peoples R China; Chongqing Technol & Business Univ, Coll Mech Engn, Chongqing 400067, Peoples R China; China Agr Univ, Coll Elect & Informat Engn, Beijing 100083, Peoples R China; Chinese Acad Agr Mechanizat Sci, Beijing 100083, Peoples R China;

来源：SENSOR LETTERS

关键词： Canopy Volume Automatic Measurement Method Manual Measurement Method Ultrasonic Sensor

2Research on the Influence Factors of Ultrasonic Measurement System of Tree Canopy Volume

作者： Hu, Kaiqun; Fu, Zetian; Qi, Lijun; Ji, Ronghua; Wang, Jun; SCI

机构： China Agr Univ, Coll Engn, Beijing 100083, Peoples R China; China Agr Univ, Coll Elect & Informat Engn, Beijing 100083, Peoples R China; Chinese Acad Agr Mechanizat Sci, Beijing 100083, Peoples R China;

来源：SENSOR LETTERS

关键词： Tree Canopy Volume Ultrasonic Sensor Relative Velocity Wind Direction and Velocity

3Design and Development of Variable Rate Spraying System Based on Canopy Volume Measurement

作者： Fu, Zetian; Qi, Lijun; Hu, Kaiqun; Ji, Ronghua; Wang, Jun; SCI

机构： China Agr Univ, Coll Engn, Beijing 100083, Peoples R China; Chongqing Technol & Business Univ, Coll Mech Engn, Chongqing 400067, Peoples R China; China Agr Univ, Coll Elect & Informat Engn, Beijing 100083, Peoples R China; Chinese Acad Agr Mech Sci, Beijing 100083, Peoples R China;

来源：COMPUTER AND COMPUTING TECHNOLOGIES IN AGRICULTURE V, PT I

关键词： Variable rate spraying system Canopy Volume measurement Ultrasonic sensor Single chip

年份：2012