公开(公告)号：US10119842B1

公开(公告)日：2018-11-06

申请号：US14451993

申请日：2014-08-05

Applicant: X Development LLC

Inventor： John Henry Grossman

IPC: G01D5/26 ,  G01D5/347

Abstract: A shaft may be rotated, where the shaft includes an encoder with a first, second, and third logical track, where the first and second logical tracks include bit patterns that are readable to be 90 degrees out of phase with one another, and where the third logical track includes a sequence of n numbers, each number being represented by m bits, where n is greater than 1. While moving the shaft, a number of the sequence from the third logical track and an extent of bits from the first or second logical track may be read. An orientation of the shaft may then be determined based on the number and the extent of bits. The orientation may be a linear position of a linear encoder or an angular position of a rotary encoder.