Patent
Method and apparatus for determining the shape of a flexible body
Peter C. Chen,James S. Sirkis +1 more
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TLDR
In this article, a fiber optic shape measurement system using Bragg grating sensor technology and time, spatial, and wavelength division multiplexing was proposed to produce a plurality of strain measurements along one fiber path.Abstract:
A fiber optic measurement system capable of greatly improving the cost, complexity, and efficiency with which flexible body shape estimates are made. The fiber optic shape measurement system uses Bragg grating sensor technology and time, spatial, and wavelength division multiplexing, to produce a plurality of strain measurements along one fiber path. Using a plurality of fibers, shape determination of the body and the tow cable can be made with minimal ambiguity. Also disclosed is a method to resolve the body shape based on strain-to-shape structural analysis. Possible applications include, but are not limited to, sensing the shape and position of flexible bodies, aid in improving the efficiency of existing acoustic surveying processing techniques, and related applications in geophysical prospecting.read more
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Robotic instrument systems and methods utilizing optical fiber sensors
TL;DR: In this article, Bragg sensor optical fibers are coupled to an elongated instrument body and include a fiber core having one or more Bragg gratings, and a controller is configured to initiate various actions in response thereto.
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Fiber optic position and shape sensing device and method relating thereto
Brooks A. Childers,Dawn K. Gifford,Roger G. Duncan,Matthew T. Raum,Michael E. Vercellino,Mark E. Froggatt +5 more
TL;DR: In this paper, the authors proposed a position and shape sensing device using an optical fiber means, which consists of either two single core optical fibers or a multicore optical fiber having at least two fiber cores.
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TL;DR: In this paper, a microprocessor can be configured to resolve a multi-dimensional force vector corresponding to the contact force applied to the distal extremity of a vessel or organ.
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Mark E. Froggatt,Roger G. Duncan +1 more
TL;DR: In this article, the optical fiber is physically associated with an object and the strain on at least a portion of the fiber where it is associated with the object is determined by an OFDR using one or more Rayleigh scatter patterns.
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TL;DR: In this paper, a controller is configured to determine a twist of at least a portion of the instrument body based on detected reflected light signals, which can be robotically or manually controlled.
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Optical waveguide sensor arrangement having guided modes-non guided modes grating coupler
TL;DR: In this paper, an optical waveguide sensor arrangement for sensing at least one physical parameter is provided, which consists of a source and an optoelectronic detector, which is positioned in an operable relationship to the OWS sensor.