Method and arrangement for determining the linear (heat) expansi

Details Method and arrangement for determining the linear (heat) expansi Method and arrangement for determining the linear (heat) expansi

1992-02-03

1993-03-02

Haroian, Harry N.

Geometrical instruments

Distance measuring

Error compensation

G01B 1104

Patent

active

051898071

ABSTRACT:
A method for determining and, when appropriate, compensating for the linear (heat) expansion of elongated bodies (1), such as physical length scales (1) or of elongated bodies which are intended to support physical length scales on, e.g., instruments or measuring machines equipped with physical length scales, in which measurement errors occur because of length deviations of the scale (1) as a result of deviations from a reference temperature at which the scale was calibrated.
The method is mainly characterized by measuring the linear expansion of the body (1) in relation to at least one reference (6) made of a material whose coefficient of linear (heat) expansion (.alpha.) deviates from the coefficient of linear (heat) expansion of the body material, and thereafter determining, when appropriate, a compensation factor for correcting the body length.
The invention also relates to an arrangement for carrying out the method.

REFERENCES:
patent: 4831737 (1989-05-01), Grund

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