Patent ID: 6418629
Filing Date: 2002-07-16
Classification: G01B

Abstract:
A rotating angle measuring device for measuring a rotating angle of a rotary object comprising:a holder mounted detachably to the rotary object so that the holder is rotated together with the rotary object; a rotating angle sensor coupled to the holder and having a shaft which is rotated relative to the holder; a level coupled to the shaft of the rotating angle sensor which provides an initial value as a datum for operation of the rotating angle sensor at an initial position of the rotary object; and an operation part which rotates the shaft of the rotating angle sensor, such that after rotation of the rotary object from the initial position to a second position, a rotating angle of the shaft is measured with the rotating angle sensor by rotating the shaft using the operation part until a changed value of the level caused by the rotation of the rotary object is returned to the initial value, thereby determining a rotating angle of the rotary object.