Title:
構造上の損傷の検出用の方法と装置
Document Type and Number:
Japanese Patent JP3676780
Kind Code:
B2
Abstract:
The entire contents of these applications are incorporated herein by reference. A method and apparatus for detecting and monitoring fractures in a structure by monitoring acoustic energy transmitted within the structure by receiving continuously over a period of time electrical signals from a plurality of acoustic tranducers carried by the structure in a pulse processor to form data bursts from pulses in the signals and deriving, for each of a plurality of the data bursts, delta-t values representing the differences between burst arrival times at each sensor, the delta-t values forming a delta-t pattern, and generating a damage indication signal when the delta-t pattern is repeated to a predetermined degree.
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Inventors:
O'Brien, Edwin William
Ibbotson, Andrew Robert
Ibbotson, Andrew Robert
Application Number:
JP2002502432A
Publication Date:
July 27, 2005
Filing Date:
May 18, 2001
Export Citation:
Assignee:
BAE SYSTEMS plc
International Classes:
G01N29/44; G01M5/00; G01M7/00; G01N29/14; G01N29/36; G01N29/38; (IPC1-7): G01N29/22; G01N29/14
Domestic Patent References:
| JP63200083A | ||||
| JP4232835A |
Foreign References:
| WO1997011364A1 | ||||
| WO1999016538A1 |
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Ryo Hashimoto
Toshio Shirane
Sadao Muramatsu
Ryo Hashimoto
Toshio Shirane
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