发明名称 |
Acoustic inspection of one-piece bladed wheels |
摘要 |
These objects are achieved by a method of acoustically inspecting a one-piece bladed wheel in which the wheel is driven in rotation; each blade of the wheel is subjected to mechanical excitation; its acoustic response is picked up and a corresponding electrical signal is generated; its frequency response is determined by computing a FFT; the electrical signal and the associated frequency response are stored; the characteristic frequencies of each blade of the wheel are identified; and a wheel is rejected or accepted depending on whether or not the frequency distribution obtained in this way matches a predetermined set of forbidden frequency distributions. Advantageously, an additional step is provided in which the defects of a blade are determined by comparing its frequency response with predetermined frequency responses that are characteristic of various types of defect.
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申请公布号 |
US6629463(B2) |
申请公布日期 |
2003.10.07 |
申请号 |
US20010971614 |
申请日期 |
2001.10.09 |
申请人 |
SNECMA MOTEURS |
发明人 |
NAUDET JACKY;MARY JEAN-LUC;COLLOT ANDRE;BERTHILLIER MARC |
分类号 |
G01M99/00;G01M7/00;G01N29/04;G01N29/44;G01N29/46;(IPC1-7):G01N29/04 |
主分类号 |
G01M99/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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