Optically scanning displacement sensor with linearity correction

Details Optically scanning displacement sensor with linearity correction Optically scanning displacement sensor with linearity correction

1988-06-27

1989-09-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 1, G01N 2186

Patent

active

048641472

ABSTRACT:
An optically scanning displacement sensor is arranged to compute by means of a triangulation an inverse function from a first measured distance signal proportional to output position signals from a position detecting means which receiving reflected light from an object to be detected, and the first measured distance signal is multiplied at a linearity correcting means by a signal of a sum of the inverse function and a constant so as to compute a second measured distance signal, whereby a two-dimensional position detection can be realized with the least required memory capacity and the minimum adjusting process.

REFERENCES:
patent: 3612890 (1971-10-01), Cornyn et al.
patent: 4601574 (1986-07-01), Yamane et al.
patent: 4633077 (1986-12-01), Ikari et al.
patent: 4647209 (1987-03-01), Neukomm et al.

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