MEASUREMENT DEVICE AND MEASUREMENT METHOD FOR LIQUID SURFACE EIGHT

摘要

An apparatus (1000) for measuring height of a liquid surface according to the present invention includes: a feeding duct (100) which is connected to an upper part of a tank (10) where a liquid is stored, with a lower part open, and moves up and down by a transportation unit (200); a gas injection tube (300) which injects a gas into the feeding duct (100); a pressure sensor (400) which generates atmospheric pressure data by measuring an internal pressure of the feeding duct (100) periodically; and a control part (500) which measures the height of the liquid surface of the liquid by calculating the height by measuring a distance for the feeding duct (100) to move from the upper part of the tank (10) to a lower side at the time when the atmospheric pressure data transmitted from the pressure sensor (400) are changed. A method for measuring the height of the liquid surface according to the present invention includes: a first step of installing the feeding duct with the lower part open on the upper part of the tank where the liquid is stored; a second step in which the transportation unit moves the feeding duct up and down; a third step in which the gas injection tube injects the gas into the feeding duct; a fourth step in which the pressure sensor generates the atmospheric pressure data by measuring the internal pressure of the feeding duct periodically; and a fifth step in which the control part measures the height of the liquid surface of the liquid by calculating the height by measuring the distance for the feeding duct (100) to move from the upper part of the tank (10) to the lower side when the atmospheric pressure data transmitted from the pressure sensor (400) are changed.