Optical-electronic monitoring apparatus

Details Optical-electronic monitoring apparatus Optical-electronic monitoring apparatus

1982-08-20

1985-10-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

57 81, G01N 2186

Patent

active

045490864

ABSTRACT:
An optical electronic monitoring apparatus is used to detect undesired coil or lap formation at transport and drive rollers 13. For this purpose the beam 14 of a light barrier is arranged along the surface of the roller 13 parallel to its axis 23 in such a way that it is partially obscured by the cross-section of the roller. The subsequent evaluation circuit has a low pass filter 16, a differentiation stage 17 and a further low pass filter 18.

REFERENCES:
patent: 3604940 (1971-09-01), Matthews
patent: 3900738 (1975-08-01), McKay
patent: 4267554 (1981-05-01), Loepfe et al.
patent: 4417147 (1983-11-01), Faville

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