Fiber optic vibration sensor

Details Fiber optic vibration sensor Fiber optic vibration sensor

1994-02-15

1995-01-10

Healy, Brian

Optical waveguides

Optical waveguide sensor

385 27, 385 15, 385 31, 385 36, 385 42, 385 88, 385 92, 356345, 73800, 25022711, 25022714, 25022718, 25022719, G02B 602, H01J 516, G01B 902, G01L 124

Patent

active

053814924

ABSTRACT:
A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity.

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