초록 ▼

A liquid level measuring system using a strain-gauge load cell is disclosed. The system includs a buoyancy weight standing upright in a liquid held in an object to be measured in a long bar shape, and having an average density substantially the same as that of the liquid; the strain-gauge load cell

A liquid level measuring system using a strain-gauge load cell is disclosed. The system includs a buoyancy weight standing upright in a liquid held in an object to be measured in a long bar shape, and having an average density substantially the same as that of the liquid; the strain-gauge load cell producing a change in the buoyancy weight varied with the liquid level as a change of an electrical signal; an amplifier amplifying a voltage signal detected from the strain-gauge load cell; an analog/digital converter converting an amplified voltage signal into a digital signal; a central processing unit applying a driving pulse to the strain-gauge load cell and average-operating a plurality of digital signals to find an average value of the liquid level; and a display displaying the average value of the liquid level as a number.

대표청구항 ▼

[ What is claimed is:] [1.] A liquid level measuring system for measuring a level of a liquid in a structure, comprising:a buoyancy weight immovably supported in the structure and standing upright in the liquid, said buoyancy weight having an elongate bar shape, and an average density substantially

[ What is claimed is:] [1.] A liquid level measuring system for measuring a level of a liquid in a structure, comprising:a buoyancy weight immovably supported in the structure and standing upright in the liquid, said buoyancy weight having an elongate bar shape, and an average density substantially the same as that of the liquid;a strain-gauge load cell for indicating, in the form of a voltage signal, a change in a weight of the buoyancy weight caused by a change in liquid level in the structure;amplifying means for amplifying the voltage signal from the strain-gauge load cell;analog/digital converting means for converting the amplified voltage signal into a digital signal;control means for repeatedly applying a driving pulse to the strain-gauge load cell and for average-operating a plurality of digital signals produced by the analog/digital converting means to determine an average value of the liquid level; anddisplay means for displaying the average value of the liquid level as a number.