Apparatus and method for measuring head speed and opening angle

Details Apparatus and method for measuring head speed and opening angle Apparatus and method for measuring head speed and opening angle

1995-04-13

1997-03-25

O'Shea, Sandra L.

Electricity: measuring and testing

Electrical speed measuring

Including 'event' sensing means

423221, 423409, G01P 368, A63B 6936

Patent

active

056148232

ABSTRACT:
An apparatus and a method for measuring head speed and an opening angle. At least four sensors are disposed at each vertex of a defined rectangle. An instrumentation device measures differences in time between instants in which a moving head intercepts rays of light toward the sensors, respectively. An arithmetic unit calculates head speed and an opening angle on the basis of the measured time differences.

REFERENCES:
patent: 3601408 (1971-08-01), Wright
patent: 4254956 (1981-03-01), Rusnak
patent: 4304406 (1981-12-01), Cromarty
patent: 4342455 (1982-08-01), Miyamae
patent: 4615526 (1986-10-01), Yasuda et al.
patent: 4958836 (1990-09-01), Onozuka et al.
patent: 5419562 (1995-05-01), Cromarty
patent: 5435547 (1995-07-01), Lee

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