Patent
Fiber optic aircraft load relief control system
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TLDR
In this paper, a load measuring system consisting of an optical pulse generator, an optical bus, a plurality of optical pulse routing switches, and optical attenuators disposed along the surface where the load is to be measured, is described.Abstract:
A fiber optic load measuring system is disclosed comprising an optical pulse generator, an optical bus, a plurality of optical pulse routing switches, a plurality of optical attenuators disposed along the surface where the load is to be measured, a plurality of optical pulse routing switches, and a signal processor. The optical attenuators are each connected to a dedicated optical pulse routing switch and are adapted to vary the attenuation of the optical pulse in response to the applied load. The optical pulse routing switches are adapted to selectively direct the optical pulses to individual optical attenuators, such that each of the optical attenuators is separately and sequentially pulsed.read more
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References
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Patent
Optical sensing apparatus and method
TL;DR: A sensor for measuring stress, temperature, pressure, sound, etc. as mentioned in this paper is composed of a light source which injects light into one end of a waveguide, a deformer contacting and deforming the waveguide to cause light to couple from originally excited modes to other modes, and an optical detector to detect the change in light coupling caused by deformation.
PatentDOI
Fiber optic strain sensor.
Gerald Meltz,Elias Snitzer +1 more
TL;DR: In this article, the cross-talk between adjacent cores in the optical waveguide can be optimized to respond to a change in hydrostatic pressure (20) or in unidirectional strain along the length of the fiber.
Patent
Microbending of optical fibers for remote force measurement
TL;DR: In this article, a system for remote measurement of structural forces includes a plurality of microbend transducers mounted along the length of the structure for microbending an optical fiber in response to structural forces, such as stress acting upon an oil or gas pipeline or the like.
Patent
Apparatus for generating light pulse train
TL;DR: In this paper, the ends of a length of optical fiber are coupled to each other to form a closed loop so that light wave may propagate freely through the looped optical fiber.
Patent
Transducer for converting acoustic energy directly into optical energy
TL;DR: In this paper, a transducer is disclosed in which energy received from either mechanical or acoustic sources is converted into modulated optical power, and an intensity modulated output signal is then carried by the output optical fiber away from the transducers.