Testing apparatus

Details Testing apparatus Testing apparatus

1979-12-14

1982-06-08

Ruggiero, Joseph F.

Boots, shoes, and leggings

33174P, 364507, 364819, G06F 15336, G06G 719

Patent

active

043342825

ABSTRACT:
A method of deriving the value of any one of the commonly used parameters for characterizing surfaces in surface measurement technology includes the steps of computing the autocorrelation function of a signal representing the surface, and selectively utilizing values of this autocorrelation function together with the value of the sampling interval used in generating the autocorrelation function, to derive the desired parameter values. This method considerably simplifies the information on a surface which is required, and enables micro-processor techniques to be used in the computation of the parameters.

REFERENCES:
patent: 3359409 (1967-12-01), Dryden
patent: 3571579 (1971-03-01), Whitehouse et al.
patent: 3609684 (1971-09-01), Lipp
patent: 3626168 (1971-12-01), Norsworthy
patent: 3728533 (1973-04-01), Matthews
patent: 3792245 (1974-02-01), Hocker et al.
patent: 3819920 (1974-06-01), Goldfischer

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