Method and apparatus for computing surface coefficients of frict

Details Method and apparatus for computing surface coefficients of frict Method and apparatus for computing surface coefficients of frict

1987-09-21

1989-03-21

Lall, Parshotam S.

Measuring and testing

Frictional resistance, coefficient or characteristics

73489, 364556, G01N 1902

Patent

active

048132667

ABSTRACT:
A microprocessor-based interactive apparatus to compute coefficients of static and dynamic friction for a test surface using deceleration data of a weighted block sliding to a rest on the test surface. The apparatus provides an accessible graphical display of the recorded deceleration data which comprises a series of relative time values and associated block acceleration values. A movable cursor permits the user to interactively select the point on the surface for which the coefficient of friction is to be computed. The computed coefficient is then displayed on the graphics display device with the deceleration plot. The cursor may then be redisplayed and moved horizontally with respect to the graphical plot of the deceleration data so that another coefficient of friction may be computed and displayed for a different selected point.

REFERENCES:
patent: 4212063 (1980-07-01), Hardmark
patent: 4490802 (1984-12-01), Miller
patent: 4594878 (1986-06-01), Abe et al.
patent: 4745564 (1988-05-01), Tennes et al.

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