王秀清,王尹超,杨世凤,赵继民,张静雅.基于柱面近场声全息的植物病害胁迫分析[J].农业机械学报,2012,43(10):179-183.
Wang Xiuqing,Wang Yinchao,Yang Shifeng,Zhao Jimin,Zhang Jingya.Plant Disease Stress Analysis Based on Cylindrical Near-field Acoustic Holography[J].Transactions of the Chinese Society for Agricultural Machinery,2012,43(10):179-183.
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基于柱面近场声全息的植物病害胁迫分析   [下载全文]
Plant Disease Stress Analysis Based on Cylindrical Near-field Acoustic Holography   [Download Pdf][in English]
  
DOI:10.6041/j.issn.1000-1298.2012.10.032
中文关键词:  植物  病害胁迫  近场声全息  声发射信号
基金项目:国家自然科学基金资助项目(61071207)
作者单位
王秀清 天津科技大学 
王尹超 天津科技大学 
杨世凤 天津科技大学 
赵继民 天津科技大学 
张静雅 天津科技大学 
中文摘要:为了解植物受病害胁迫时产生声发射信号的分布规律,探寻植物病害程度与声发射位置的关系,利用近场声全息技术,建立了基于空间声场变换的重建模型,给出了重建算法,并利用Matlab软件进行模拟仿真。通过不断调整全息柱面尺寸、测量点间距、重建半径等参数,获取最佳参数配置,并利用窗函数去除混入的高斯噪声。仿真结果显示,可用于指导实际全息检测和定位,实现对植物病害的声发射信号的准确识别与定位。
Wang Xiuqing  Wang Yinchao  Yang Shifeng  Zhao Jimin  Zhang Jingya
Tianjin University of Science and Technology;Tianjin University of Science and Technology;Tianjin University of Science and Technology;Tianjin University of Science and Technology;Tianjin University of Science and Technology
Key Words:Plant, Disease stress, Near-field acoustic holography, Acoustic emission signal
Abstract:When plant suffered from disease, the acoustic emission signal released. In order to understand the acoustic emission signal distribution regularities, the relationship between the degree of plant disease and acoustic emission signal’s position was analyzed. The near-field acoustic holography based on spatial transformation of sound fields was used for the purpose of reconstruction model. The reconstruction algorithm was given out in order to realize the simulation through Matlab software. The parameters, such as the size of holographic cylindrical, the spacing of measurement points, the holographic radius, the reconstruction radius and so on should be adjusted constantly to obtain the optimal parameters. In view of the impact of environmental noise and acoustic emission signal characteristics, the window function was introduced into ultrasonic frequency signal to obtain the optimum simulation results. It was showed that cylindrical near-field acoustic holography based on spatial transformation of sound fields can be applied for recognition and positioning of acoustic emission signal accurately.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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