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:
Feb. 09, 2021
Filed:
Aug. 30, 2019
Mitutoyo Corporation, Kanagawa-ken, JP;
Christopher Richard Hamner, Kirkland, WA (US);
Ted Staton Cook, Kirkland, WA (US);
Scott Allen Harsila, Shoreline, WA (US);
Kazuhiko Hidaka, Tokyo, JP;
MITUTOYO CORPORATION, Kanagawa-Ken, JP;
Abstract
An inductive position detector (IPD) for stylus position measurement in a scanning probe comprises a coil board configuration located along a central axis in the probe with a motion volume extending on opposite sides of the coil board configuration. The coil board configuration includes N top rotary sensing coils (RSCs) and a top axial sensing coil configuration (ASCC), and N bottom RSCs and a bottom ASCC. A pair of stylus-coupled conductive disruptors move along Z (axial) and X-Y (rotary) directions in the motion volume. A generating coil (GC) of the coil board configuration generates a changing magnetic flux (e.g., encompassing all or at least part of the disruptors), and coil signals indicate the disruptors and/or stylus positions. Areas of the conductive disruptors may be larger than an area of the generating coil in some implementations, and the conductive disruptors may each comprise a plurality of concentric conductive loops, spirals, etc.