An optical fiber flow speed sensor of increased sensitivity
| Autor: | Hiroshi Iitaka, Sojun Sato, Toshio Nemoto, Yoshihiro Hashimoto |
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| Rok vydání: | 1998 |
| Předmět: |
Optical fiber
Materials science business.industry Energy Engineering and Power Technology Polarization-maintaining optical fiber Vortex generator Kármán vortex street law.invention Vortex Optics Flow velocity law Fiber optic sensor Sensitivity (control systems) Electrical and Electronic Engineering business |
| Zdroj: | Electrical Engineering in Japan. 125:1-8 |
| ISSN: | 1520-6416 0424-7760 |
| DOI: | 10.1002/(sici)1520-6416(199810)125:1<1::aid-eej1>3.0.co;2-u |
| Popis: | A simple-structured speed sensor in which a polarization-maintaining optical fiber is used as a Karman vortex generator and also as a vortex frequency sensor had earlier been proposed. For measuring ocean current velocity, a double-fin-type sensor mount was designed and investigated in detail experimentally. Although the experimental results showed its essential effectiveness, several problems were found. A conduit-type sensor mount has newly been proposed for solving these problems. A sensor for this mount has been constructed by using a circular pipe 16 mm in diameter. Experimental studies of the sensor show a wide range of agreement between detected frequencies versus measured flow speeds and the frequencies expected from the Roshko equation. The minimum detectable flow speed is 0.27 m/s. © 1998 Scripta Technica, Electr Eng Jpn, 125(1): 1–8, 1998 |
| Databáze: | OpenAIRE |
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