Method and device for detecting average liquid level in a bottle

Details Method and device for detecting average liquid level in a bottle Method and device for detecting average liquid level in a bottle

1986-11-24

1988-03-22

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340619, 73293, G01N 1506

Patent

active

047330953

ABSTRACT:
A method for detecting a liquid level is monitored at mutually opposing sides of a liquid containing bottle. For monitoring the liquid level at each side of the bottle, a diffused light beam is irradiated toward the liquid surface from a level below the liquid surface. The light reflected at the liquid surface and the light refracted at the liquid surface are detected by a photo-receiving camera which is focused at a standard liquid level. An average value of the monitored liquid levels at both sides is taken as a liquid level indicative value. By employing the aforemention method, accurate detection of the liquid level becomes possible even when the liquid level is unstable.

REFERENCES:
patent: 3094213 (1983-06-01), Wyman
patent: 3452208 (1969-06-01), Giltinan
patent: 4246489 (1981-01-01), Yoshida et al.
patent: 4672216 (1987-06-01), Pitt et al.

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