Patent ID: 6348943
Filing Date: 2002-02-19
Classification: B23D,G01D

Abstract:
A digital non-contact blade position detection apparatus for detecting the position of a blade, which comprises:a light source for generating a light beam; a light converging optical unit for converting the light beam from the light source; light diverting means for diverting the beam light from the light converging optical unit to a preset optical path in which the blade is interdisposed, with the blade being interdisposed at a first predetermined distance from the converging point of the light beam passing through the light converging optical unit; a light diverging optical unit, disposed at a second predetermined distance from the position where the blade is disposed, for diverging the diverted light beam from the light diverting means; a CCD position detector, disposed at a third predetermined distance from the light diverging optical unit, for detecting a displacement of a diffractive part of the light beam passing through the optical path between first and second prisms that is partly blocked out by the blade; an analog-to-digital converter for converting the analog displacement signal from the CCD position detector into digital data; and computer means, taking the digital data from the analog-to-digital converter as inputs, for determining accordingly the required correction in the position of the blade due to wear to the blade.