[1]董红平,李明*. 基于瞬时频率的木材声发射事件辨识与损伤监测[J].西北林学院学报,2020,35(2):229-234.[doi:10.3969/j.issn.1001-7461.2020.02.35]
　DONG Hong-ping,LI Ming*. Wood Acoustic Emission Event Identification Based on Instantaneous Frequency and Damage Monitor[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2020,35(2):229-234.[doi:10.3969/j.issn.1001-7461.2020.02.35]
点击复制

 基于瞬时频率的木材声发射事件辨识与损伤监测()
分享到：

《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第35卷
期数:
2020年第2期
页码:
229-234
栏目:
出版日期:
2020-03-31

文章信息/Info

Title:
 Wood Acoustic Emission Event Identification Based on Instantaneous Frequency and Damage Monitor
文章编号:
1001-7461(2020)02-0229-06
作者:
 董红平1; 李明2*
 （1.绍兴职业技术学院 机电工程学院，浙江 绍兴 312000；2.西南林业大学，云南 昆明 650224）
Author(s):
 DONG Hong-ping1; LI Ming2*
 (1.School of Mechanical and Electrica Engineering,Shaoxing Vocational & Technical College,Shaoxing 312000,Zhejiang,China; 2.Southwest Forestry University,Kunming 650224,Yunnan,China)
关键词:
 ; 声发射; 损伤; 瞬时频率; 木材
Keywords:
 ; acoustic emission;  damage;  instantaneous frequency;  wood
分类号:
S781.6
DOI:
10.3969/j.issn.1001-7461.2020.02.35
文献标志码:
A
摘要:
 为了从能量的角度客观评价木材损伤程度，依据应变能释放产生的声发射（AE）信号特征，提出一种基于信号瞬时频率的AE事件辨识方法，并依据AE事件的发生密度从能量的角度进行损伤动态监测。采用小波分析的方法对原始信号进行降噪预处理，用经验模态分解（EMD）进行波形重构。依据AE信号的频率分布特征将AE信号分为2类，并对应地定义DAE和FAE 2类AE事件。通过Hilbert变换获得AE信号的瞬时频率，依据瞬时频率计算2种AE事件发生的密度，依此判断和预测木材的应力变化及损伤趋势。结果表明，FAE信号频率明显高于DAE信号频率，并且当DAE事件密度维持较高水平时，意味着材料以弹性形变为主；相反当FAE事件密度维持较高水平时，说明材料正在发生频繁的断裂，从而为木材损伤程度的研判提供评价依据。
Abstract:
 In order to evaluate damage state of wood from the aspect of strain energy,acoustic emission (AE) signal released by strain energy was used to monitor stress level of wood.Specifically,AE events were redefined according to instantaneous frequency of AE signals.And then,the density of AE events was calculated to estimate the damage degree.Firstly,a four-channel signal acquisition system was built for AE signal collection and its software was programmed in LabVIEW.After the raw AE signal was collected by the system,wavelet analysis method was used to filter noise and reconstruct AE waveform.Then,the reconstructed AE signal was dealt with empirical mode decomposition (EMD) to reduce the noise level.Secondly,two types of AE signals were defined by their frequency characters.Two kinds of AE events were defined by two types of AE signals.One was denoted FAE that was caused by fracture,and the other was DAE caused by fibers deformation in this paper.At last,instantaneous frequency of AE signal was obtained through Hilbert transform.Meanwhile,the density of each AE event was used to evaluate the damage degree and its growing trend.From the test results,the frequency of FAE was obviously higher than that of DAE.Higher density of DAE event meant that the damage was mainly caused by elastic deformation.Correspondingly,higher density of FAE event meant that the damage was mainly caused by fracture.With instantaneous frequency,a new definition of AE event was proposed in this paper.Especially,quantity and density of AE event could reflect the stress level and damage degree of wood.

相似文献/References:

[1]李亚藏,梁彦兰,王庆成. 铅对山梨和山荆子光合作用和叶绿素荧光特性的影响[J].西北林学院学报,2012,27(05):21.
　LI Ya-cang,LIANG Yan-lan,WANG Qing-cheng. Influence of Pb on Photosynthesis and Chlorophyll Fluorescence Characteristics in Pyrus ussuriensis and Malus baccata [J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2012,27(2):21.
[2]张小咏,李佳,杨艳昭,等. 基于SWAT模型的长江源区径流模拟[J].西北林学院学报,2012,27(05):38.
　ZHANG Xiao-yong,LI Jia,YANG Yan-zhao,et al. Runoff Simulation of the Catchment of the Headwaters of the Yangtze River Based on SWAT Model[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2012,27(2):38.
[3]杨红旗,陈广辉,王金林. PVAc改性酚醛树脂制备铝木复合材料研究[J].西北林学院学报,2013,28(01):170.[doi:10.3969/j.issn.1001-7461.2013.01.34]
　YANG Hong-qi,CHEN Guang-hui,WANG Jin-lin. PF Adhesive Modified by PVAc for Manufacturing Technology of Decorative Fiberboard with Aluminum Foils[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(2):170.[doi:10.3969/j.issn.1001-7461.2013.01.34]
[4]江涛,李秀荣,谢延军,等. 微波预处理对巨尾桉木材渗透性的影响[J].西北林学院学报,2013,28(01):174.[doi:10.3969/j.issn.1001-7461.2013.01.35]
　JIANG Tao,LI Xiu-rong,XIE Yan-jun,et al. Effects of Microwave Pretreatment on the Permeability of Eucalyptus grandis×Eucalyptus urophylla[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(2):174.[doi:10.3969/j.issn.1001-7461.2013.01.35]
[5]牛晓霆,王逢瑚,曹新民. 明清家具匠师原木下料的工艺原则及措施[J].西北林学院学报,2013,28(01):178.[doi:10.3969/j.issn.1001-7461.2013.01.36]
　NIU Xiao-ting,WANG Feng-hu,CAO Xin-min. Techniques and Principles of Log Cuttings of Furniture Makers in Ming and Qing Dynasties[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(2):178.[doi:10.3969/j.issn.1001-7461.2013.01.36]
[6]吕金阳,覃卓凯,舒辉,等. 银杉木材构造美学价值[J].西北林学院学报,2013,28(01):183.[doi:10.3969/j.issn.1001-7461.2013.01.37]
　LV Jin-yang,QIN Zhuo-kai,SHU Hui,et al. Esthetical Values in Wood Structure of Cathaya argyrophylla[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(2):183.[doi:10.3969/j.issn.1001-7461.2013.01.37]
[7]杨艳红,张海敏,孙景荣. 基于传统文化视角的现代家具设计探析[J].西北林学院学报,2013,28(01):188.[doi:10.3969/j.issn.1001-7461.2013.01.38]
　YANG Yan-hong,ZHANG Hai-min,SUN Jing-rong. Study of Modern Furniture Design Based on Traditional Culture[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(2):188.[doi:10.3969/j.issn.1001-7461.2013.01.38]
[8]黄圣游,叶喜. 新中式家具“中式”传统的界定[J].西北林学院学报,2013,28(01):192.[doi:10.3969/j.issn.1001-7461.2013.01.39]
　HUANG Sheng-You,YE Xi. Definition of Traditional Element in New Chinese Style Furniture[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(2):192.[doi:10.3969/j.issn.1001-7461.2013.01.39]
[9]韩维生,赵明磊,王宏斌. 基于阈限理论的设计尺度体系[J].西北林学院学报,2013,28(01):197.[doi:10.3969/j.issn.1001-7461.2013.01.40]
　HAN Wei-sheng,ZHAO Ming-lei,WANG Hong-bin. Design Scale System Based on Threshold Theory[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(2):197.[doi:10.3969/j.issn.1001-7461.2013.01.40]
[10]宋杰,侯建军,申黎明. 按摩椅按摩头包覆层对按摩舒适性的影响[J].西北林学院学报,2013,28(01):202.[doi:10.3969/j.issn.1001-7461.2013.01.41]
　SONG Jie,HOU Jian-jun,SHEN Li-ming. Influence of Massager Coat Layer of Massage Chairs on the Degree of Comfort[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(2):202.[doi:10.3969/j.issn.1001-7461.2013.01.41]
[11]丁馨曾,赵海龙,申珂楠,等. 声发射技术在木材干燥中的应用与发展[J].西北林学院学报,2015,30(03):242.[doi:doi:10.3969/j.issn.1001-7461.2015.03.43]
　DING Xin-zeng,ZHAO Hai-long,SHEN Ke-nan,et al. Application of Acoustic Emission Technique in Wood Drying[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2015,30(2):242.[doi:doi:10.3969/j.issn.1001-7461.2015.03.43]
[12]于帅帅,申丽娟,李杨,等. 云南松表面声发射信号采集与特征分析[J].西北林学院学报,2017,32(2):247.[doi:10.3969/j.issn.1001-7461.2017.02.42]
　YU Shuai-shuai,SHEN Li-juan,LI Yang,et al. Acquisition and Characteristic Analysis of the Surface of Pinus yunnanensis Acoustic Emission Signal[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(2):247.[doi:10.3969/j.issn.1001-7461.2017.02.42]
[13]李杨,罗廷芳,于帅帅,等. 花旗松胶合木梁声发射信号及其传播特征研究[J].西北林学院学报,2017,32(5):197.[doi:10.3969/j.issn.1001-7461.2017.05.33]
　LI Yang,LUO Ting-fang,YU Shuai-shuai,et al. Signal Propagation Characteristics of Acoustic Emission and Douglas Fir Glulam Beams[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(2):197.[doi:10.3969/j.issn.1001-7461.2017.05.33]
[14]李新慈,鞠双,罗廷芳,等. 马尾松胶合木胶层对声发射信号传播特性的影响[J].西北林学院学报,2019,34(3):185.[doi:10.3969/j.issn.1001-7461.2019.03.29]
　LI Xin-ci,JU Shuang,LUO Ting-fang,et al. Influence of Adhesive Layer at Masson Pine Glulam on Acoustic Emission Signal Propagation Characteristics[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2019,34(2):185.[doi:10.3969/j.issn.1001-7461.2019.03.29]
[15]豆春峰,熊鑫,李明,等. 基于声发射技术的木材害虫信号特征检测[J].西北林学院学报,2020,35(4):120.[doi:10.3969/j.issn.1001-7461.2020.04.20]
　DOU Chun-feng,XIONG Xin,LI Ming,et al. Signal Characteristics Detection of Wood Pests Based on Acoustic Emission Technology[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2020,35(2):120.[doi:10.3969/j.issn.1001-7461.2020.04.20]
[16]李晓崧,邓婷婷,王明华,等. 基于信号相似度小波重构与时差的胶合木表面声发射源定位[J].西北林学院学报,2021,36(2):202.[doi:10.3969/j.issn.1001-7461.2021.02.30]
　LI Xiao-song,DENG Ting-ting,WANG Ming-hua,et al. Localization of Acoustic Emission Sources on Glulam Surface Based on Signal Similarity Wavelet Reconstruction[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2021,36(2):202.[doi:10.3969/j.issn.1001-7461.2021.02.30]
[17]王明华,邓婷婷,李晓崧,等. L型结构木材中声发射信号传播特征[J].西北林学院学报,2021,36(2):213.[doi:10.3969/j.issn.1001-7461.2021.02.32]
　WANG Ming-hua,DENG Ting-ting,LI Xiao-song,et al. Propagation Characteristics of Acoustic Emission Signals in L-Shaped Wood[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2021,36(2):213.[doi:10.3969/j.issn.1001-7461.2021.02.32]
[18]李晓崧,邓婷婷,王明华,等. 基于小波谱白化与自适应小波重构的木材损伤声发射源直线定位法研究[J].西北林学院学报,2021,36(3):218.[doi:10.3969/j.issn.1001-7461.2021.03.32]
　LI Xiao-song,DENG Ting-ting,WANG Ming-hua,et al. Linear Positioning Method of Acoustic Emission Source of Wood Fracture Based on Wavelet Spectral Whitening and Adaptive Wavelet Reconstruction[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2021,36(2):218.[doi:10.3969/j.issn.1001-7461.2021.03.32]
[19]罗蕊寒,方赛银,丁锐,等. 基于小波变换的木材声发射驻波信号特征研究[J].西北林学院学报,2023,38(3):194.[doi:10.3969/j.issn.1001-7461.2023.03.26]
　LUO Rui-han,FANG Sai-ying,DING Rui,et al. Research on Standing Wave Signal Characteristics of Wood Acoustic Emission Based on Wavelet Transform[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2023,38(2):194.[doi:10.3969/j.issn.1001-7461.2023.03.26]

备注/Memo

备注/Memo:
 收稿日期：2019-06-13修回日期：2019-07-03
基金项目：国家自然科学基金项目（31760182）。
作者简介：董红平，男，硕士，讲师，研究方向：智能制造、声发射技术、电液控制。E-mail:31856321@qq.com
*通信作者：李明，男，教授，博士，博士生导师，研究方向：智能控制与智能优化算法、声发射无损检测、电液控制。E-mail:572721868@qq.com
更新日期/Last Update: