Absolute angle calculation apparatus

Details Absolute angle calculation apparatus Absolute angle calculation apparatus

2008-05-27

2009-12-22

Lau, Tung S (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Orientation or position

Reexamination Certificate

active

07636644

ABSTRACT:
The absolute angle calculation apparatus includes a calculation circuit calculating an absolute angular position based on a spatially modulated component in a photoelectrically-converted signal string. The calculation circuit includes a photoelectrically-converted signal string storage storing previous and current photoelectrically-converted signal strings obtained, for interpolating the absolute angular position, within a set time shorter than an absolute angle calculation time required to calculate the absolute angular position; a correlation detection circuit detecting a correlation between the previous and current photoelectrically-converted signal strings in the photoelectrically-converted signal string storage and detecting a shift amount therebetween; and an interpolation calculation circuit interpolating an inter-pattern absolute angular position equivalent value based on the shift amount obtained by the current measurement. The calculation circuit calculates an interpolated angle based on the shift amount and the absolute angular position equivalent value, adds the calculated interpolated angle obtained at the current measurement to the absolute angular position obtained at the previous measurement to calculate a current absolute angular position.

REFERENCES:
patent: 4786891 (1988-11-01), Ueda et al.
patent: 3168451 (2001-03-01), None

Affiliated with

Also associated with

Rating

Absolute angle calculation apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Absolute angle calculation apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute angle calculation apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4143624