Method and apparatus for detecting amplitude and frequency of we

Details Method and apparatus for detecting amplitude and frequency of we Method and apparatus for detecting amplitude and frequency of we

1990-05-22

1991-12-17

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503381, 250340, G01S 1708

Patent

active

050737147

ABSTRACT:
Web flutter in a papermaking machine is monitored by a device which illuminates a portion of the web with infrared light and uses an infrared sensor to monitor the resulting infrared light scattered back from the web. Preferably two infrared light transmitters are used which are angled from each other to insure that light is scattered to the sensor independently of the orientation of the web.

REFERENCES:
patent: 3703097 (1972-11-01), Kilpatrich et al.
patent: 3892492 (1975-07-01), Eichenberger
patent: 3906232 (1975-09-01), Meihofer
patent: 4276910 (1981-07-01), Eichenberger
patent: 4501642 (1985-02-01), Wells
patent: 4637727 (1987-01-01), Ahola et al.

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