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公开(公告)号：US11199462B1
公开(公告)日：2021-12-14
申请号：US16709936
申请日：2019-12-11
发明人： Vahid Sotoudeh , Behzad Moslehi , Joshua Kuehn , Richard J. Black
摘要： A temperature correcting pressure gauge which has a diaphragm having at least one surface coupled to a source of pressure to be measured, the diaphragm first surface having a first FBG from a first optical fiber attached in an appropriately sensitive region of the diaphragm, a FBG from a second optical fiber attached to the opposite surface from the first FBG, the first and second FBGs reflecting or transmitting optical energy of decreasing or increasing wavelength, respectively, in response to an applied pressure. The first and second FBGs have nominal operating wavelength ranges that are adjacent to each other but are exclusive ranges and the FBGs also have closely matched pressure coefficients and temperature coefficients.
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公开(公告)号：US10801267B1
公开(公告)日：2020-10-13
申请号：US16004108
申请日：2018-06-08
发明人： Richard J. Black , Behzad Moslehi
摘要： A drill has a stationary drive mechanism coupled to a rotating drill, the rotating drill having a serpentine optical fiber positioned on an inner shell having a serpentine groove with fiber Bragg gratings (FBGs) coupled to the inner shell and arranged parallel to the central axis of rotation for measurement of axial forces and also positioned circumferentially for measurement of drill torque. The FBGs are arranged on a single optical fiber and coupled to a broadband optical source such that reflected optical energy is directed to an interrogator for estimate of strain at each FBG. The FBG responses may also be examined dynamically to estimate material hardness during a drilling operation.
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公开(公告)号：US11471135B2
公开(公告)日：2022-10-18
申请号：US16271883
申请日：2019-02-11
发明人： Yong-Lae Park , Richard James Black , Behzad Moslehi , Mark R. Cutkosky , Santhi Elayaperumal , Bruce Daniel , Alan Yeung , Vahid Sotoudeh
IPC分类号： A61B10/02 , A61B90/00 , A61M25/00 , G01L1/24 , A61M25/01 , A61B17/00 , A61B18/14 , A61B34/20
摘要： A biopsy needle has a central axis and includes one or more sensing regions, each sensing region formed by a plurality of sensing optical fibers located over a particular extent of said central axis and inside the outer shell of the needle. The sensing optical fibers are coupled to a wavelength interrogator. A steerable catheter has a central axis and outer shell, the outer shell coupled to a plurality of optical fibers in sensing regions and actuation regions, the sensing regions formed over particular extents of the central axis by bonding gratings to the inner surface of the outer shell, and the actuation regions formed by coupling optical energy into shape memory alloys bonded to the outer shell.
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公开(公告)号：US11000265B1
公开(公告)日：2021-05-11
申请号：US15626540
申请日：2017-06-19
发明人： Seok Chang Ryu , Richard J. Black , Behzad Moslehi
摘要： A biopsy needle has a cylindrical shell outer cannula and a stylet consisting of an inner stylet and outer stylet, both of which are inserted into the cylindrical cannula. The outer stylet has a series of strain relieved slits which provide bending over a deflection region in one direction, and the outer stylet is formed from a material such as a shape memory alloy (SMA) having a superelastic phase. The deflection is generated by an SMA wire spanning a deflection extent and attached to the outer stylet on either side of the deflection extent. The inner stylet, when positioned inside the outer stylet, has one or more actuation fibers which couple optical energy into the SMA wire or hollow SMA tube, causing a deflection of the outer stylet over the deflection extent, with the optical energy provided to the actuation fibers for control of the deflection. Additional fibers may be placed in the inner stylet to measure temperature and to measure deflection.
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公开(公告)号：US10238370B2
公开(公告)日：2019-03-26
申请号：US14147486
申请日：2014-01-03
发明人： Yong-Lae Park , Richard James Black , Behzad Moslehi , Mark R. Cutkosky , Santhi Elayaperumal , Bruce Daniel , Alan Yeung , Vahid Sotoudeh
摘要： A biopsy needle has a central axis and includes one or more sensing regions, each sensing region formed by a plurality of sensing optical fibers located over a particular extent of said central axis and inside the outer shell of the needle. The sensing optical fibers are coupled to a wavelength interrogator. A steerable catheter has a central axis and outer shell, the outer shell coupled to a plurality of optical fibers in sensing regions and actuation regions, the sensing regions formed over particular extents of the central axis by bonding gratings to the inner surface of the outer shell, and the actuation regions formed by coupling optical energy into shape memory alloys bonded to the outer shell.
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公开(公告)号：US11598678B1
公开(公告)日：2023-03-07
申请号：US16718113
申请日：2019-12-17
发明人： Behzad Moslehi , Mehrdad Moslehi
IPC分类号： G01K11/32 , H01S3/30 , G01K11/324
摘要： A distributed temperature sensor system has a pulsed laser coupled to a circulator, the circulator having a laser input and coupling energy to an optical reference coil in series with a measurement fiber having loops or helical turns, the circulator having a backscatter signal port coupling backscattered reflections from the measurement fiber. The backscatter signal port is coupled to a switch and mux, the switch and mux selecting either an anti-Stokes filter or a Stokes filter, the output of the mux coupled to a photodetector, the photodetector coupled to a histogram processor synchronized to the pulsed laser enable. The histogram processor uses the anti-Stokes and Stokes histogram counts associated with a sensor region to estimate a temperature of that sensor region.
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