Method of interval interpolation

Details Method of interval interpolation Method of interval interpolation

1981-06-24

1984-07-24

Chin, Gary

Boots, shoes, and leggings

364571, 364723, G06F 15353

Patent

active

044620837

ABSTRACT:
An improved method of interval interpolation, i.e., subdivision of a signal period, is disclosed. Generally, at least one scanning signal (S.sub.1, S.sub.2) generated by a scanning unit (G) scanning a scale (M) is converted into digital form and input to a computer (R) for the computation of interpolation values. In the case of a high subdivision factor, before the execution of the interpolation algorithm, the scanning signals input to the computer (R) are corrected for amplitude inequality, incorrect phase differential and the direct voltage component of the scanning signals (S.sub.1, S.sub.2). The correction values are automatically determined by direct voltage detectors (GT.sub.1, GT.sub.2), amplitude detectors (AT.sub.1, AT.sub.2) and a phase comparator (PV) during at least one pass of the measuring system (G, M) over its measuring interval. The correction values are stored in the computer (R) and are automatically utilized thereby in interpolation during measurement.

REFERENCES:
patent: 3720813 (1973-03-01), Badessa
patent: 4080657 (1978-03-01), Caldicott et al.
patent: 4205575 (1980-06-01), Hoskinson et al.
patent: 4225931 (1980-09-01), Schwefel
patent: 4231097 (1980-10-01), Shibayama et al.
patent: 4330837 (1982-05-01), Itani

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