Error correction system for position measuring device

Details Error correction system for position measuring device Error correction system for position measuring device

1983-04-27

1985-07-02

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33125A, 33125C, 356374, G01B 504, G01B 1104

Patent

active

045270562

ABSTRACT:
A length or angle measuring system is provided in which for the purposes of error correction the graduation of the measuring scale is scanned on both sides of the graduation axis which runs along the measuring direction. The weighting given to the two sides of the measuring graduation is varied according to the desired error correction course. Several different approaches to varying this weighting are disclosed, including the mounting of a scanning unit so as to be shiftable transversely to the graduation axis of the graduation.

REFERENCES:
patent: 3709611 (1973-01-01), Taisne
patent: 4060903 (1977-12-01), Ernst
patent: 4170828 (1979-10-01), Ernst
patent: 4170829 (1979-10-01), Nelle
patent: 4262423 (1981-04-01), Affa
patent: 4430799 (1984-02-01), Affa
patent: 4461083 (1984-07-01), Ernst
patent: 4475289 (1984-10-01), Nelle
patent: 4490914 (1985-01-01), Spies
Handbook of Transducers for Electronic Measuring Systems, by Harry N. Norton, California Institute of Technology, 1969 by Prentice Hall, pp. 192-197.

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