PURPOSE: To enable the accurate measurement of a liquid level even when numerous bubbles exist at the position of the liquid level, by applying rays of light from a position on one side of a bottle and below the liquid level to the portion of this level on the side of a light-receiving camera disposed on the other side of the bottle.
CONSTITUTION: A light source assembly 15 comprising a light source 17and a diffusion plate 1 is set so that rays 19 of light emitted therefrom are applied from a position below the level 12 of a liquid 11 in a bottle 10 to the portion 20 of the liquid lvel on the side of a light-receiving camera 16. The rays of light applied to the portion 20 of the liquid level are reflected diffusely on a boundary surface between bubbles 13 existing numerously at the position of the liquid level and the liquid 11, and these rays reflected diffusely are transmitted through the wall of the bottle 10 and received by the light-receiving camera 16. The rays received by the light-receiving camera 16 are converted into voltages by a photoelectric converter 30 and displayed as a bright stripe-shaped portion 31 indicating the position of the liquid level 12 by a display means.
HATSUTORI HIDEJIROU
YOSHIOKA FUMIO
| JPS548076A | 1979-01-22 | |||
| JPS56146225U | 1981-11-04 | |||
| JPS4866462A | 1973-09-12 |
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