Roughness diagnostic tool

Details Roughness diagnostic tool Roughness diagnostic tool

1978-05-15

1979-01-09

Ciarlante, Anthony V.

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 528

Patent

active

041332040

ABSTRACT:
A roughness measuring tool wherein a pair of discs are mounted in spaced allel relation for rotation by a motor about a common axis with a face of only one of the discs being exposed to a layer of fluid contacting a surface to be tested. A torsionally resilient coupling beteen the discs permits rotational displacement due to a difference in hydrodynamic drag thereon. The displacement is sensed as a phase difference between signals generated by rotation of the discs and a phase signal is applied to a function generator the output of which is displayed as a figure of merit of test surface condition.

REFERENCES:
patent: 4019379 (1977-04-01), Wartelle et al.
patent: 4081989 (1978-04-01), Majcherczyk

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