DETECTING CAVITATION SIGNALS BASED ON ULTRASONIC ACOUSIC EMISSIONS TECHNOLOGYE

作     者：Jian-xin WANG~1,Mei-li SUI~2,Shi-feng YANG~3,Xian-wei GAO~1 1 Department of Electronic and Information Engineering,Beijing Electronic Science and Technology Institute Beijing City Fengtai District Fufeng Road No.7,Bingjing,100070,China 2 Beijing Senior Expert Technology Center Chinese Academy of Sciences Beijing City Yuquan Road No.19,Bingjing,100046,China 3 College of Electronic Information and Automation,Tianjin University of Science And Technology Tianjin City Hexi District Dagunan Road No.1038.Tianjin,300222,China 

会议名称：《2010全国压电和声波理论及器件技术研讨会》

会议日期：2010年

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

关 键 词：water deficit ultrasonic acoustic emissions UAEs 

摘      要：This paper presents the experimental analysis on the relationship between Ultrasoinc acoustic emissions (UAEs) and water consumption associated with *** order to avoid background noise interference, the UAEs detecting frequency is between 100 KHz and 1 *** the experiments,the hypothesis can be drawn that irrigation conducts when the UAEs reach a certain threshold,which may be beneficial to plant *** a serious water deficit,the excessive transpiration cannot well recover,so there are some UAEs occuring in the night and next morning to lead to the physiological activities ahead of *** ultrasonic acoustic emission event indicates the fracture of water columns in conduits,the several UAEs hits indicate the several elastic deformations of conduits in the process of energy *** signal strength can not only reflect the acoustic emission event,but also reflect the signal energy,which indicates the transpiration pull force and tomato plant water *** is better to use UAEs technique to diagnose the plant water status and carry out automatic and precise irrigation for the plant and to improve the effect of water-saving irrigation.