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Author:

吴斌 (吴斌.) (Scholars:吴斌) | 颜丙生 (颜丙生.) | 李佳锐 (李佳锐.) | 何存富 (何存富.) (Scholars:何存富)

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incoPat zhihuiya

Abstract:

金属材料疲劳早期损伤非线性超声在线检测方法属于无损检测领域。本发明步骤:根据被测试件的厚度确定激励信号参数并输入任意函数发生器生成单一音频信号;根据空载时的噪声信号幅值确定声发射仪门槛值;给被测试件进行疲劳加载,由声发射传感器连续实时检测声发射信号,放大后输入声发射仪,当声发射信号幅值超过声发射仪预设的门槛值,声发射仪判定振铃;如果声发射仪没有显示振铃或连续振铃次数没有超过经验值,则等时间间隔检测非线性超声信号;如果显示连续振铃次数超过了经验值,表明有疲劳裂纹萌生和发展,结束检测。本发明在非线性超声无损检测的基础上引入声发射技术在检测金属材料的早期疲劳损伤时不会出现误判;实现了连续在线检测。

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Patent Info :

Type: 发明授权

Patent No.: CN201010119536.7

Filing Date: 2010-03-05

Publication Date: 2011-07-27

Pub. No.: CN101806778B

Applicants: 北京工业大学

Legal Status: 未缴年费

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 8

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