Journal ArticleDOI
Fiber optic sensors for Navy applications
A. Dandridge,G.B. Cogdell +1 more
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In this article, the development of a family of sensors to detect a wide range of energy fields by exploiting their effects on the optical signal in a fiber-optic waveguide is examined.Citations
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Fluid parameter measurement in pipes using acoustic pressures
TL;DR: In this article, a spatial array of acoustic pressure sensors (14, 16, 18) placed at predetermined axial locations x1,x2,x3 along the pipe is used to measure the speed of sound amix.
Patent
Distributed sound speed measurements for multiphase flow measurement
Daniel L. Gysling,Mark R. Myers +1 more
TL;DR: In this article, a multiphase flow meter distributed system is described that is capable of measuring phase flow rates of a multi-phase fluid, which includes at least one flow meter disposed along the pipe, an additional sensor disposed along a pipe spatially removed from the flow meter, and a mult-phase flow model that receives flow related parameters from a flow meter and the additional sensor to calculate the phase flow rate.
Patent
Apparatus for sensing fluid in a pipe
TL;DR: In this paper, an apparatus for non-intrusively sensing fluid flow within a pipe is provided, which includes a first sensing array for sensing acoustic signals traveling at the speed of sound through fluid flow in a pipe, a second sensing array to measure local pressure variations traveling with the fluid flow, and a housing attached to the pipe for enclosing the sensing arrays.
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Flow rate measurement using unsteady pressures
TL;DR: In this article, a first filter for measuring a pressure field at a first axial location along the pipe and providing a first pressure signal indicative of the vortical pressure field.
Patent
Method and apparatus for interrogating fiber optic sensors
TL;DR: In this paper, a two-beam interferometer is used to generate a series of discrete light pulses that are directed at sensors positioned between pairs of low reflectivity fiber Bragg gratings.
References
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Journal ArticleDOI
Optical fiber sensor technology
Thomas G. Giallorenzi,Joseph A. Bucaro,Anthony Dandridge,G. H. Sigel,J. H. Cole,Scott C. Rashleigh,R. Priest +6 more
TL;DR: The current state of the art of optical fiber sensors is reviewed, the principles of operation are detailed and the various types of fiber sensors are outlined.
Journal ArticleDOI
Homodyne demodulation scheme for fiber optic sensors using phase generated carrier
TL;DR: In this paper, a phase generated carrier is used to detect phase shifts in the microradian range, which obviates the phase tracker resetting problem encountered in active homodyne detection schemes.
Journal ArticleDOI
Optimization and stabilization of visibility in interferometric fiber-optic sensors using input-polarization control
TL;DR: In this paper, the effects of input polarization on the output fringe visibility of two-beam interferometric fiber-optic sensors are investigated, and an analysis which predicts the existence of input states of polarization of eigenmodes of the interferometer for which optimum output visibility is obtained is presented.
Journal ArticleDOI
Fibre optic accelerometer
TL;DR: In this paper, an all-fibre Mach-Zehnder interferometer was used to detect the change in optical path length produced by the strain in the fibre.