Edge detecting system and method

Details Edge detecting system and method Edge detecting system and method

1990-09-26

1993-03-16

Raevis, Robert

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 528

Patent

active

051933845

ABSTRACT:
An edge detecting system for detecting an edge on a wavy surface includes a stylus for tracking across the surface; a transducer, responsive to the stylus, for producing a signal representative of surface transitions sensed by the stylus; a support for suspending the stylus over the surface with the stylus contacting the surface in which the support has a natural frequency which isolates the stylus from the low-frequency wavy surface contours and compels the stylus to respond only to the higher frequency surface transitions. Further included is a detector, responsive to the transducer, for detecting a signal representative of an edge amidst other high-frequency surface transitions. Also disclosed is a system in which the signal of the transducer is averaged and then compared to a reference level to determine the orientations of the fibers in the material of the surface.

REFERENCES:
patent: 2405133 (1946-08-01), Brown
patent: 4103542 (1978-08-01), Wheeler et al.
patent: 4669300 (1987-06-01), Hall et al.
patent: 4776212 (1988-10-01), Parsons et al.
patent: 4987303 (1991-01-01), Takase et al.

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