2016 Fiscal Year Final Research Report
Guided-wave optical acoustic emission sensor and its obsevation system
| Project/Area Number |
26420302
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Niigata University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
NIKKUNI Hiroyuki 東京工業高等専門学校, 講師 (90547829)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | アコースティック・エミッションセンサ / 光導波型センサ / 光集積回路 / ダイヤフラム / 光導波路 |
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| Outline of Final Research Achievements |
Our resonance-type guided-wave optical acoustic emission (AE) sensor consists of a diaphragm and a single-mode optical waveguide on the diaphragm. In order to obtain higher resonance frequency, dependences of resonance frequency on diaphragm dimensions were considered. According to experimental results, resonance frequency was found to be proportional to diaphragm thickness, and inversely proportional to square of side length, as theoretically predicted. Regarding to pulse-width characteristics, time constant was several ms. Also, maximum output voltage was found to be proportional to applied sound pressure. Moreover, use of higher-order mode is useful to expand detectable frequency range.
An AE signal estimation system consisting of noise reduction and AE parameter estimation was built as a Windows application. The system performance was successfully examined using test signals with different amplitude, time duration and noise level.
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| Free Research Field |
センサ・デバイス
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