Optical velocity measuring with efficient use of radiation passi

Details Optical velocity measuring with efficient use of radiation passi Optical velocity measuring with efficient use of radiation passi

1994-09-29

1996-10-29

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023118, 360 7314, G01D 534

Patent

active

055699120

ABSTRACT:
A device for measuring the angular velocity of a rotating object (35) is described, which device comprises a first disc (23) moving with the object and having a rotationally symmetrical pattern of interruptions (24), and a second disc (29) having a similar pattern and a detector (34) which receives radiation passed by the patterns and converts it into an electric measuring signal. The device is very accurate, reliable and compact. The linear velocity of an elongated object, for example a recording tape, can also be measured with the device.

REFERENCES:
patent: 3040222 (1962-06-01), Kunz et al.
patent: 3809335 (1974-05-01), Mantey
patent: 3912926 (1975-10-01), Coulbourn
patent: 4637264 (1987-01-01), Takahashi et al.
patent: 4658132 (1987-04-01), Nishiura et al.
patent: 4788422 (1988-11-01), Fujiwara
patent: 5259563 (1993-11-01), Kakiwaki et al.

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