Sensor for measuring velocity of vibration using light waveguide
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United States of America Patent
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Aug 28, 2007
Grant Date -
Jul 13, 2006
app pub date -
Dec 23, 2003
filing date -
Jun 27, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention provides a device or method for measuring vibration with high sensitivity and over a wide bandwidth.A curved section is formed in an optical fiber. The curved section is disposed on a place to be measured. Light is input in the optical fiber, and then variation of frequency between the input light and the output light is detected.Infinitesimal vibration applied to the curved section can be measured as variation of frequency between the input light and the output light. Further, it is possible to measure vibration over a wide bandwidth.
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