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云南松表面声发射信号采集与特征分析 被引量:12

Acquisition and Characteristic Analysis of the Surface of Pinus yunnanensis Acoustic Emission Signal
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摘要 为了采集云南松(Pinus yunnanensis)表面声发射信号,使用NI高速数据采集设备搭建了多通道声发射信号采集平台,同时设计了相应的声发射信号采集与分析平台,实现了多通道信号采集以及从噪声中重构信号。通过云南松声发射试验验证了该平台的有效性,从噪声中重构声发射信号,进一步验证了小波变换在信号提取方面的优越性。作为一种木材声发射信号处理与分析平台,为以后的木材声发射信号研究奠定了基础。 In order to obtain the acoustic emission signal from the surface of Pinus yunnanensis timber, a multi-channel acoustic emission signal acquisition system based on NI high-speed datum acquisition equip- ment was constructed. The corresponding acoustic emission signal acquisition and analysis platform were designed, which realized the multi-channel signal acquisition and the reconstruction of the signal from the noise. The system was proved to be effective. By reconstructing the acoustic emission signal from the noise, advantages of wavelet analysis in signal extraction were verified. As an acoustic emission signal processing and analysis platform,it would lay a foundation for the study of acoustic emission signal of wood in the fu- ture.
作者 于帅帅 申丽娟 李杨 李明 YU Shuai-shuai SHEN Li-juan LI Yang LI Ming(College of Machinery and Transportation, Southwest Forestry University, Kunming ,Yunnan 650224, Chin)
出处 《西北林学院学报》 CSCD 北大核心 2017年第2期247-251,300,共6页 Journal of Northwest Forestry University
基金 国家自然科学基金项目(31100424) 西南林业大学科技创新基金(C15029)
关键词 声发射 小波变换 木材 信号 acoustic emission wavelet transform timber signal
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