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Title: Fiber optic vibration sensor

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. 2 figures.
Authors:
; ;
Publication Date:
OSTI Identifier:
6876644
Report Number(s):
US 5381492; A
PPN: US 8-196963
DOE Contract Number:
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Patent File Date: 15 Feb 1994
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; MEASURING INSTRUMENTS; DESIGN; MECHANICAL VIBRATIONS; MEASURING METHODS; OPTICAL FIBERS; FIBERS 440800* -- Miscellaneous Instrumentation-- (1990-)