摘要
This paper reports the development of an advanced acoustic emission system for transient elastic wave measurements. The goal is to develop an inexpensive but effective acoustic emission system which can simultaneously obtain high-frequency acoustic emission signals at multiple locations. The transient elastic signals can then be used for inversely deducing important characteristics of the acoustic emission event. To achieve this goal, a number of miniature PZT elements are first fabricated using an excimer laser micro-machining technique. The PZT element is in conical shape and with an aperture size around 200 μm. Very similar to the conventional NBS conical transducer but much smaller in size, the miniature PZT element is an excellent acoustic emission transducer with much high bandwidth. A new packaging method of the mini-conical element allows the transducer not only can measure conductive samples but also non-conductive ones. This improvement greatly enhances the applicability of the acoustic emission system. A number of PZT mini-conical transducers have been used to construct the acoustic emission measurement system. The transducer has been tested with standard glass capillary breaking methods. Finally, a mechanical fixture is designed to mount these acoustic emission transducers and to make the acoustic emission measurements much more convenient. To demonstrate the capability of this advanced acoustic emission system, a number of plate samples are used. Acoustic emission signal at multiple locations are obtained and compared with their theoretical counterparts. Good results are obtained. Further improvement and application of this system will be addressed.
| 原文 | English |
|---|---|
| 頁（從 - 到） | 471-478 |
| 頁數 | 8 |
| 期刊 | Key Engineering Materials |
| 卷 | 270-273 |
| 發行號 | I |
| 出版狀態 | Published - 2004 十一月 25 |
| 事件 | Proceedings of the 11th Asian Pacific Conference on Nondestructive Testing - Jeju Island, Korea, Republic of 持續時間: 2003 十一月 3 → 2003 十一月 7 |
指紋
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
引用此文
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An advanced acoustic emission sensor for transient elastic wave measurements. / Lee, Yung-Chun; Lin, Zi Bin; Kuo, Shi Hoa.
於: Key Engineering Materials, 卷 270-273, 編號 I, 25.11.2004, p. 471-478.研究成果: Conference article
TY - JOUR
T1 - An advanced acoustic emission sensor for transient elastic wave measurements
AU - Lee, Yung-Chun
AU - Lin, Zi Bin
AU - Kuo, Shi Hoa
PY - 2004/11/25
Y1 - 2004/11/25
N2 - This paper reports the development of an advanced acoustic emission system for transient elastic wave measurements. The goal is to develop an inexpensive but effective acoustic emission system which can simultaneously obtain high-frequency acoustic emission signals at multiple locations. The transient elastic signals can then be used for inversely deducing important characteristics of the acoustic emission event. To achieve this goal, a number of miniature PZT elements are first fabricated using an excimer laser micro-machining technique. The PZT element is in conical shape and with an aperture size around 200 μm. Very similar to the conventional NBS conical transducer but much smaller in size, the miniature PZT element is an excellent acoustic emission transducer with much high bandwidth. A new packaging method of the mini-conical element allows the transducer not only can measure conductive samples but also non-conductive ones. This improvement greatly enhances the applicability of the acoustic emission system. A number of PZT mini-conical transducers have been used to construct the acoustic emission measurement system. The transducer has been tested with standard glass capillary breaking methods. Finally, a mechanical fixture is designed to mount these acoustic emission transducers and to make the acoustic emission measurements much more convenient. To demonstrate the capability of this advanced acoustic emission system, a number of plate samples are used. Acoustic emission signal at multiple locations are obtained and compared with their theoretical counterparts. Good results are obtained. Further improvement and application of this system will be addressed.
AB - This paper reports the development of an advanced acoustic emission system for transient elastic wave measurements. The goal is to develop an inexpensive but effective acoustic emission system which can simultaneously obtain high-frequency acoustic emission signals at multiple locations. The transient elastic signals can then be used for inversely deducing important characteristics of the acoustic emission event. To achieve this goal, a number of miniature PZT elements are first fabricated using an excimer laser micro-machining technique. The PZT element is in conical shape and with an aperture size around 200 μm. Very similar to the conventional NBS conical transducer but much smaller in size, the miniature PZT element is an excellent acoustic emission transducer with much high bandwidth. A new packaging method of the mini-conical element allows the transducer not only can measure conductive samples but also non-conductive ones. This improvement greatly enhances the applicability of the acoustic emission system. A number of PZT mini-conical transducers have been used to construct the acoustic emission measurement system. The transducer has been tested with standard glass capillary breaking methods. Finally, a mechanical fixture is designed to mount these acoustic emission transducers and to make the acoustic emission measurements much more convenient. To demonstrate the capability of this advanced acoustic emission system, a number of plate samples are used. Acoustic emission signal at multiple locations are obtained and compared with their theoretical counterparts. Good results are obtained. Further improvement and application of this system will be addressed.
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M3 - Conference article
AN - SCOPUS:8644222069
VL - 270-273
SP - 471
EP - 478
JO - Key Engineering Materials
JF - Key Engineering Materials
SN - 1013-9826
IS - I
ER -