Process to determine the absolute angular position of a...

Details Process to determine the absolute angular position of a... Process to determine the absolute angular position of a...

2006-07-06

2008-08-26

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital pattern reading type converter

Optical

C341S001000

Reexamination Certificate

active

07417563

ABSTRACT:
A method for determining the absolute value of a rotational angle includes imaging a continuous segment of a code track of a code carrier on a sensor array such that the sensor array generates a corresponding output signal. The code track includes a code provided over an angular range of 360°. The code contains a plurality of code words with each code word respectively corresponding to an angular value in the angular range. The output signal is correlated with a reference signal in a correlation filter to produce a correlation function signal. The reference signal is indicative of the code and the angular values corresponding to the code words. The correlation function signal is processed to determine the code word of the imaged segment of the code track as a function of the angular value where the output signal best coincides with the reference signal.

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