The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 2020
Filed:
Jun. 08, 2018
Intelligent Fiber Optic Systems, Inc., Santa Clara, CA (US);
Richard J. Black, Menlo Park, CA (US);
Behzad Moslehi, Los Altos, CA (US);
Intelligent Fiber Optic Systems, Inc., San Jose, CA (US);
Abstract
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.