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Input Output Device for Characterization of the Morphology of Microstructures

IP.com Disclosure Number: IPCOM000091522D
Original Publication Date: 1968-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Chaudhari, P: AUTHOR [+2]

Abstract

Exact characterization of morphology of microstructures involves processing of tediously obtained statistical data. In practice, frequently, unsatisfactory shortcuts and approximations are made.

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Input Output Device for Characterization of the Morphology of Microstructures

Exact characterization of morphology of microstructures involves processing of tediously obtained statistical data. In practice, frequently, unsatisfactory shortcuts and approximations are made.

An input/output device is provided to handle this problem with a computer. This device encodes the coordinates and slopes of any curved line or closed loop, e.g., grain boundaries in micrographs, for numerical calculations. The device consists of a modified pantograph of which the mobile endpoint is made to follow the trace of the curve. Two rollers, similar to planimeter rollers, are attached to the mobile end with axes in X and Y direction to resolve the motion into X and Y components. The rollers drive angular encoders and the signals from these are proportional to the X and Y components of the tangent vector.

Alternatively, a roller can be used mounted such that it remains parallel to the tangent end is rotatable around an axis perpendicular to the plane of the curve. The travel of the roller is encoded to measure the length of the curve. Its position alpha around the axis perpendicular to the plane is encoded to measure the local direction of the tangent vector.

Pin P, drawing 1, is attached either to a sliding frame allowing X-Y movement or a pantograph, drawing 2, or a similar device which permits tracing a curve C with the lower end of such pin. In order to obtain the orientation of the tangent of the curve as a function of the arc length S of the curve, roller R is attached t...