Tokyo Gas Company Limited

Tomohide Machida

Takeshi Abe

Yasuhiko Shinozawa

Kouichiro Yamada

Yoshinobu Miyagi

[Theme] To provide a device or a judging method for judging the type of liquid inside a container that can be applied to containers of various shapes and can be applied to cases where the remaining amounts of liquids in containers differ. [Solution Means] This invention's device for judging the type of liquid inside a container is equipped with: a plate capacitor, wherein two plate electrodesandare positioned in opposing manner; a container supporting member, holding, in a region besides the region sandwiched between plate electrodesand, a non-conductive containerthat can contain a liquid in its interior; an oscillation circuit, containing capacitor; and a control part, detecting the oscillation frequency of the oscillation circuit; and container supporting memberis arranged to adjust the distance from plate electrodeto containerin accordance with the size of container. Also, a third electrode, of the same electric potential as plate electrode, is disposed in contact with a bottom part of container

Device for judging types of liquid in container and control method therefor

A technique for quickly determining the type of liquid in a container externally regardless of the material of the container, preferably contactlessly. A halogen heaterand an infrared thermopileare disposed outside an electrically conductive containermade of aluminum, for example. The surface temperature of the containeris measured when the halogen heateris off, followed by the turning-on of the halogen heaterfor two seconds, for example. The surface temperature of the containeris then measured, and a difference from the previous result of measurement is calculated. If the difference is smaller than a threshold value, the liquid in the container is determined to be a safe liquid consisting primarily of water, and a blue lamp is activated. If the difference is greater than the threshold value, the liquid in the container cannot be determined to be a safe liquid consisting primarily of water, and a red lamp is activated, indicating abnormality.

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Tokyo, Japan

Tomohide Machida