Underground water level sensing unit and ground monitoring system using the same
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United States of America Patent
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Sep 19, 2000
Grant Date -
N/A
app pub date -
Feb 16, 1999
filing date -
Feb 17, 1998
priority date (Note) -
Expired
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Abstract
A plurality of sensing units are buried at suitable intervals in an area of ground or a snow accumulation section to be observed. Each of the sensing units includes a gyro-sensor for, when external force acts on it as a result of the displacement of the ground or the snow accumulation section, sensing impulsive acceleration from the magnitude and direction of the displacement and the inclination of the sensing unit itself, and a transmission section for transmitting the sense data by radio. A base station acquires the sense data transferred from the sensing units, processes the sense data for each measuring point in real time, determines the movement of the ground and/or the snow accumulation section, and judges a state of the ground and/or the snow accumulation section on the basis of the movement.
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