| 摘要 |
PROBLEM TO BE SOLVED: To obtain a ground displacement measuring system suitable for removing the noise and capable of reducing the power consumption. SOLUTION: In a signal transmitting section 10, power is fed to each part thereof at a time preset by a timer circuit 14 and a detection signal of a clinometer 11 is transmitted as a magnetic signal from the bottom of the water to the water surface. A receiving section 20 detects the magnetic signal from the signal transmitting section 10 through a plurality of receiving coils 21-1,..., 21-3. Modulated wave is recorded on a recorder 24 and the content of record is collected and reproduced thus demodulating the detection signal of clinometer 11. |
