Abstract
We report an amplitude division multiplexed interferometric sensor array for locating acoustic emission. The interferometer is composed of 3 arms, the two sensing arms have different interference amplitude with the reference arm, so we can judge whether a sensor receives sound or not from the composite interference amplitude. For single sound source, the sound-receiving delay of two sensors can be obtained from the time when the interference amplitude changes, and the sound source location relative to the sensors can also be achieved in a 1-D system. Preliminary experiments were carried out and demonstrated a one-dimensional (1-D) location accuracy of better than 1cm. The system can be extended for 2-D and 3-D location of acoustic emissions by adding one or two more sensing arms, respectively, in the interferometer.
Original language | English |
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Pages (from-to) | 349-354 |
Number of pages | 6 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 4596 |
DOIs | |
Publication status | Published - 1 Dec 2001 |
Event | Advanced Photonic Sensors and Applications II - Singapore, Singapore Duration: 27 Nov 2001 → 30 Nov 2001 |
Keywords
- Acoustic location
- Amplitude-multiplexing
- Interferometer
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics