OPTICAL IMAGE FOCUSING TYPE LIQUID LEVEL SENSOR, AND METHOD OF MEASURING LIQUID LEVEL DISPLACED IN INSIDE OF TRANSPARENT TUBE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an optical image-focusing type liquid level sensor, capable of measuring accurately and steplessly a liquid level displaced in the inside of a transparent tube installed vertically, and to provide a method of measuring the liquid level displaced in the inside of transparent tube that uses the same.;SOLUTION: The present invention provides the optical image focusing type liquid level sensor, comprising a light source 1 capable of illuminating the transparent tube A of a measuring object as a whole, an optical image-focusing system 2, and a linear light-receiving part 3 capable of image-focusing the transparent tube A of the measuring object as a whole, and the method of measuring the liquid level displaced in the inside of transparent tube by using the optical image-focusing type liquid level sensor, capable of image-focusing the light transmitted through the transparent tube A as a whole by the optical image-focusing system 2, on the linear sensor 3 capable of image-focusing the whole transparent tube A of the measuring object, by illuminating the transparent tube A of the measuring object as a whole, by using the linear light source 1.;COPYRIGHT: (C)2008,JPO&INPIT