公开(公告)号：US20190033147A1

公开(公告)日：2019-01-31

申请号：US16047385

申请日：2018-07-27

Applicant: Prime Photonics, LC

Inventor： Paul Samuel Zerwekh ,  David T. Gray ,  Malcolm S. Laing

IPC: G01L3/12 ,  G01L3/10 ,  G01H1/10 ,  G01B11/10 ,  G01B11/25 ,  G01P3/36

Abstract: The present disclosure relates to a method and system for characterization of torque and torsional vibration in rotating bodies. More specifically, the present disclosure describes high-fidelity, high-speed characterization of the rotary motion of a body without the requirement for surface modification. The method and system rely on the inherent properties of the surface of the rotating body to determine the degree to which the rotating body vibrates, twists, or is otherwise translated.

公开(公告)号：US11060932B2

公开(公告)日：2021-07-13

申请号：US16262566

申请日：2019-01-30

Applicant: Prime Photonics, LC

Inventor： Paul Samuel Zerwekh

IPC: G01L3/12 ,  G01B11/10 ,  G01P3/36 ,  G01B11/25 ,  G01H1/10 ,  G01L3/10 ,  G01D5/347 ,  G01H9/00 ,  G01S17/50

Abstract: Methods and systems for the absolute high-resolution measurement of angle of rotation of a shaft, which allow for concurrent measuring of axial displacement and/or encoded identification information, are disclosed. Included is a method for measuring characteristics of a rotating shaft comprising obtaining optical signals by optically probing one or more patterns having a leading edge and a series of symbols disposed at one or more circumferences of the shaft; oversampling the optical signals; measuring time of arrival for the leading edges and determining therefrom an amount of time between arrival of two or more of the leading edges; interpolating and extrapolating the amount of time between arrival of the leading edges; and determining therefrom one or more of shaft twist, angle of rotation and/or axial loading, translation, or displacement. The methods include optically probing a pattern disposed around the circumference of a shaft that comprises a series of wedge-shaped symbols.

公开(公告)号：US20200249077A1

公开(公告)日：2020-08-06

申请号：US16855145

申请日：2020-04-22

Applicant: Prime Photonics, LC

Inventor： Paul Samuel Zerwekh

IPC: G01H9/00 ,  G01L3/08 ,  G01P3/36 ,  G01P13/00

Abstract: The present disclosure relates to characterization of torque and torsional vibration in rotating bodies. More specifically, this invention enables high-fidelity, high-speed characterization of the rotary motion of a body without the requirement for surface modification. This invention relies on the inherent optical properties of the surface of the rotating body to determine the degree to which a rotating body vibrates, twists, or is otherwise translated. The system makes use of interference between propagation modes in a multi-mode optical fiber. A portion of the light reflected from the rotating body is captured by one or more multi-mode optical fiber(s) and guided to an optical detector. Rays entering the receiver fiber at different angles form different propagation modes in the fiber, and as such travel different distances. As the body rotates, the fraction of the reflected light that enters any given mode changes.

公开(公告)号：US20190162611A1

公开(公告)日：2019-05-30

申请号：US16262566

申请日：2019-01-30

Applicant: Prime Photonics, LC

Inventor： Paul Samuel Zerwekh

IPC: G01L3/12 ,  G01B11/10 ,  G01P3/36 ,  G01L3/10 ,  G01B11/25 ,  G01H1/10

Abstract: Methods and systems for the absolute high-resolution measurement of angle of rotation of a shaft, which allow for concurrent measuring of axial displacement and/or encoded identification information, are disclosed. Included is a method for measuring characteristics of a rotating shaft comprising obtaining optical signals by optically probing one or more patterns having a leading edge and a series of symbols disposed at one or more circumferences of the shaft; oversampling the optical signals; measuring time of arrival for the leading edges and determining therefrom an amount of time between arrival of two or more of the leading edges; interpolating and extrapolating the amount of time between arrival of the leading edges; and determining therefrom one or more of shaft twist, angle of rotation and/or axial loading, translation, or displacement. The methods include optically probing a pattern disposed around the circumference of a shaft that comprises a series of wedge-shaped symbols.