Patent ID: 9600851
Date: 2017-03-21
CPC Classifications: B65G,G06Q,G11B

Claim:
1. A system for tracking position of a moving element on a linear motor conveyor system having a track, the system comprising: a machine readable medium provided to one of the moving element or the track of the linear motor conveyor system, wherein the machine readable medium is configured with at least two channels with a first predetermined phase difference therebetween; an identification (ID) medium provided to the one of the moving element or the track having the machine readable medium, wherein the identification medium is configured with at least two channels with a second predetermined phase difference therebetween; a sensor provided to the other of the moving element or the track of the linear motor conveyor system, wherein the sensor is configured to read the at least two channels of the machine readable medium and the at least two channels of the ID medium; and a controller configured to receive data from the sensor and determine a position of the moving element on the track as the moving element moves along the track of the linear motor conveyor system based on the first predetermined phase difference, and wherein the controller determines an identifier of the moving element based on the second phase difference based on data received from the sensor.