Method of sensing position of movable body and apparatus...

Details Method of sensing position of movable body and apparatus... Method of sensing position of movable body and apparatus...

G - Physics

08

C

341/102, 340/137

G08C 21/00 (2006.01)

Patent

CA 1189930

ABSTRACT OF THE DISCLOSURE: A method of sensing a position of a movable body by directly or indirectly converting a unit movement of the movable body into digital pulse signals and an apparatus therefore A reference position is selected at a point, at which said movable body abuts against and presses a stopper provided at a specific position within the moving range thereof. The purse signals are counted as the movable body moves from the stopper using the reference position as a reference number. The coincidence of the number of the pulse signals counted with a first predetermined pulse number corresponding to a predetermined position is sensed so as to sense the fact that the movable body has reached a predetermined position and position sensing signals are emitted. Further, as necessary, the position sensing signals that have been emitted are sustained for the duration of a second predetermined pulse number corresponding to a predetermined stroke preset so that the position sensing signals indicate that the movable body has reached the predetermined position and is within a predetermined stroke from the predetermined position.

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