| Presentation | 1997/6/20 Quantitative Evaluation of Non-Destructive Estimation of the Position of a Crack in a Concrete Block by Eliminating the Effect of Surface Wave Kenji Sasaki, Toyota Fujioka, Masato Abe, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper describes a method to estimate the position of a crack in a concrete block using several vibration pick-ups by eliminating the effect of surface wave. An array of sensors is attached on the surface of the concrete block, and a vibration pulse is forced using a small hammer. Since the forced vibration reflects at the position of a crack, the position will be estimated by picking up the reflection wave with an array of sensor using a beamforming technique. But this method requires the restriction that a crack should be parallel to the surface. To avoid this restriction, we newly assume that the forced vibration reflects at the position of a crack and spherical wave is radiated to the sensors. Some experiments were carried out, and good results were obtained in the case that crack was slanting to the surface of the block. This paper also describes the quantitative evaluation of the proposed method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | image source / surfacewave / beamforming |
| Paper # | EA97-15 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 1997/6/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Quantitative Evaluation of Non-Destructive Estimation of the Position of a Crack in a Concrete Block by Eliminating the Effect of Surface Wave |
| Sub Title (in English) | |
| Keyword(1) | image source |
| Keyword(2) | surfacewave |
| Keyword(3) | beamforming |
| 1st Author's Name | Kenji Sasaki |
| 1st Author's Affiliation | Faculty of Engineering, Information and Computer Science, Iwate University() |
| 2nd Author's Name | Toyota Fujioka |
| 2nd Author's Affiliation | Faculty of Engineering, Information and Computer Science, Iwate University |
| 3rd Author's Name | Masato Abe |
| 3rd Author's Affiliation | Faculty of Engineering, Information and Computer Science, Iwate University |
| Date | 1997/6/20 |
| Paper # | EA97-15 |
| Volume (vol) | vol.97 |
| Number (no) | 119 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |