| Presentation | 2007/1/18 Absolute Measurement of Vibrational Displacement Using Laser Speckle Interferometer and Burst Device Driving Yasuaki Watanabe, Sunao Ishii, Shigeyoshi Goka, Takayuki Sato, Hitoshi Sekimoto, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A non-mechanical scanning method has been developed for mapping absolute vibrational patterns of piezoelectric devices based on a burst drive laser speckle method. By taking into account the statistical treatment for the distributions of the speckle intensity, the absolute vibrational shapes can be visualized. This method is based on a simple relation of coherent light interference on device surfaces and the linear relation of piezoelectricity. To derive the visibility γ, which is mandatory for determining absolute displacement, a polynomial approximation is applied to an expression of the surface interference. This is because γ is not directly obtained from general interference equations when the device being tested is excited by the burst signal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Piezoelectric Devices / Laser Speckle / Vibrational Displacement / Absolute Measurement / Image Processing |
| Paper # | US2006-97 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 2007/1/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
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| Assistant | |
| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Absolute Measurement of Vibrational Displacement Using Laser Speckle Interferometer and Burst Device Driving |
| Sub Title (in English) | |
| Keyword(1) | Piezoelectric Devices |
| Keyword(2) | Laser Speckle |
| Keyword(3) | Vibrational Displacement |
| Keyword(4) | Absolute Measurement |
| Keyword(5) | Image Processing |
| 1st Author's Name | Yasuaki Watanabe |
| 1st Author's Affiliation | Graduate School of Science and Engineering, Tokyo Metropolitan University() |
| 2nd Author's Name | Sunao Ishii |
| 2nd Author's Affiliation | Graduate School of Science and Engineering, Tokyo Metropolitan University |
| 3rd Author's Name | Shigeyoshi Goka |
| 3rd Author's Affiliation | Graduate School of Science and Engineering, Tokyo Metropolitan University |
| 4th Author's Name | Takayuki Sato |
| 4th Author's Affiliation | Graduate School of Science and Engineering, Tokyo Metropolitan University |
| 5th Author's Name | Hitoshi Sekimoto |
| 5th Author's Affiliation | Graduate School of Science and Engineering, Tokyo Metropolitan University |
| Date | 2007/1/18 |
| Paper # | US2006-97 |
| Volume (vol) | vol.106 |
| Number (no) | 481 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |