An improved fiber optic lever transducer
The concept of a bifurcated fiber optic transducer has been described and applied to the measurement of pressure and temperature. This approach has been used to design low-frequency hydrophones [F. W. Cuomo, J. Acoust. Soc. Am. 73, 1848–1857 (1983)]. The sensitivity of this device is proportional to...
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Veröffentlicht in: | The Journal of the Acoustical Society of America 1983-11, Vol.74 (S1), p.S99-S99 |
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Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | The concept of a bifurcated fiber optic transducer has been described and applied to the measurement of pressure and temperature. This approach has been used to design low-frequency hydrophones [F. W. Cuomo, J. Acoust. Soc. Am. 73, 1848–1857 (1983)]. The sensitivity of this device is proportional to the total number of adjacent transmit/receive fiber pairs used in the bundle. For good sensitivity the transmit/receive fiber distribution must be maximized while the total number of fibers must be large. This paper discusses an improved bifurcated fiber optic transducer comprising one transmit fiber and two receive fibers, each receive fiber having a different core diameter. The three fibers are separated at one end and combined at the distal end in the vicinity of a miniature reflective surface sensitive to axial motion caused by minute pressure changes such that any displacement of the reflector from equilibrium will increase or decrease the illuminated areas of the two receive fibers and will generate a processed output signal proportional to this motion. The major relevant improvements over prior designs include a probe of minimal dimensions, a greatly improved sensitivity, and an output independent of variations at the input. |
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ISSN: | 0001-4966 1520-8524 |
DOI: | 10.1121/1.2021261 |