Velocity detection method and apparatus therefor

Details Velocity detection method and apparatus therefor Velocity detection method and apparatus therefor

1990-03-01

1993-03-02

Chin, Tommy P.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, 369 54, 369 41, 369 4411, 360 7806, G11B 555, G11B 700

Patent

active

051915669

ABSTRACT:
A velocity detection method and an apparatus therefor, in which the relative velocity between a light beam and tracks is detected on the basis of a period for which the light beam crosses the tracks, and under the condition that the light beam has passed by a predetermined position on the way to the target track, the detected relative velocity is compared with a predetermined velocity value so that when the detected relative velocity is larger than the predetermined velocity value the detected relative velocity is invalidated on the assumption that erroneous detection is generated by noise.

REFERENCES:
patent: 4106058 (1978-08-01), Romeas et al.
patent: 4332022 (1982-05-01), Ceshovsky et al.
patent: 4375091 (1983-02-01), Dakin et al.
patent: 4719610 (1988-01-01), Bates et al.
patent: 4740939 (1988-04-01), Kimura et al.
patent: 4955009 (1990-09-01), Nakatsu et al.
patent: 4955011 (1990-09-01), Baba
patent: 4989190 (1991-01-01), Kuroe et al.

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