Optoelectronic system measures relative angular position of shaft or other device to be turned, also measures absolute angular position after device turned through small angle. Relative angular position measured with fine resolution by optoelectronically counting finely- and uniformly-spaced light and dark areas on encoder disk as disk turns past position-sensing device. Also includes track containing coarsely- and nonuniformly-spaced light and dark areas, angular widths varying in proportion to absolute angular position. This second track provides gating and indexing signal.
Rapidly-Indexing Incremental-Angle Encoder
NASA Tech Briefs ; 13 , 8
1989-08-01
Sonstige
Keine Angabe
Englisch
IEEE | 1966
|Electronic shaft-angle encoder
NTRS | 1977
|Capacitive shaft-angle encoder
NTRS | 1977
|Tema Archiv | 1974
|NTIS | 1969