Yarn detector with a self-calibrating circuit

Details Yarn detector with a self-calibrating circuit Yarn detector with a self-calibrating circuit

1975-10-03

1976-10-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250214AG, 356238, G01N 2132

Patent

active

039860370

ABSTRACT:
In a yarn inspection system for detecting variations in yarn diameter wherein a plurality of yarns move past a plurality of transducers for generating electrical signal outputs corresponding to yarn diameter and including discriminator circuitry sequentially connected to each of the transducers for processing the signal outputs, a self calibrating circuit arrangement has been devised to compensate for normal variations in the output of individual transducers due to different characteristics among the separate transducers.

REFERENCES:
patent: 3132254 (1964-05-01), Woodward
patent: 3421007 (1969-01-01), Schwartz
patent: 3887814 (1975-06-01), Faulhaber

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