| 摘要 |
PROBLEM TO BE SOLVED: To monitor the state of a bank for improving accuracy in the foreseeing of the collapse of the bank by detecting moisture quantity and the moved state of soil through a moisture quantity detecting sensor and an elastic wave detecting sensor which are mutually adjacently buried in the soil. SOLUTION: A moisture quantity detecting sensor 2 and an elastic wave detecting sensor 3 are mutually adjacently buried in the soil of a bank 1. In the case where it rains and a river 4 rises, the moisture quantity inside the bank 1 increases, and the output of the sensor 2 therefore increases. In the case where the earth and sand in the bank 1 move, the output of the sensor 3 increases. The outputs of the sensors 2, 3 are amplified by amplifiers 6a, 6b, and a processing section 7 measures the output of the sensor 2, and a processing section 8 measures the output of the sensor 3, and thus moisture variation and elastic wave variation per unit time are respectively computed. A processing section 9 combines the variation of moisture inside the bank, the variation of the generated quantity of an elastic wave signal and both the above information to foresee the state of the bank and its collapse, and the result of the above determination is displayed to a display section 10. |
