WATER LEVEL MEASUREMENT DEVICE

• Main Authors: KAWAHARA YOSHIHIRO, SHIGETA RYO, OYAMA KAZUHITO, CHIBA MASAHIDE
• Format: Patent
• Language: English; Japanese
• Published: 27.08.2020
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

To more accurately measure a water level from a muddy bottom.SOLUTION: The water level measurement device is configured by inserting a sensor member of a rod-like shape or a long plate shape into a box-shaped auxiliary member having a window. Attached to the window is a filter having a plug at an upper end thereof. The filter allows water to permeate therethrough while preventing mud from penetrating a side surface. In the sensor member, an underwater calibration electrode, a water level measurement electrode, and an air calibration electrode are attached in this order from a distal end to a front surface. When the water level in the water level measurement device is inserted into the muddy bottom to a position at which the water level is 0, the mud would not enter an inner side of the auxiliary member. Therefore, the influence of mud does not occur in the electrostatic capacitance detected by the underwater calibration electrode attached in the vicinity of the front end. As a result, the water level from the muddy bottom can be measured more accurately.SELECTED DRAWING: Figure 1 【課題】泥状の底からの水位をより正確に計測する。【解決手段】水位計測装置は、上端に差し込み口を有すると共に側面に泥の侵入は抑止するが水は透過するフィルターが取り付けられた窓部を有する箱状の補助部材に、棒状または長板状となるように形成され、先端部から表面に水中校正用電極と水位計測用電極と空中校正用電極とがこの順に取り付けられたセンサ部材を差し込んで構成する。水位計測装置における水位が値０となる位置まで泥状の底に差し込んで用いると、泥は補助部材の内側には侵入しないから先端部近傍に取り付けられた先水中校正用電極により検出される静電容量には泥の影響は生じない。この結果、泥状の底からの水位をより正確に計測することができる。【選択図】図１