| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a detector for acquiring much satisfactory detailed measured data as compared with prior art by simplifying an operation while largely reducing a cost in an underground elastic wave detector for detecting an elastic wave (AE wave) generated under the ground. SOLUTION: The underground elastic wave detector comprises a long cylinder 10 made of vinyl chloride inserted into an excavated hole, a plurality of elastic wave sensors 12 disposed at a suitable interval in the cylinder 10, a coupler 14 for coupling the sensors 12. In this case, the cylinder 10 is fully filled with liquid 16, and the wave generated under the ground is detected by the sensor 12 via a wall of the cylinder 10 and liquid 16.</p> |
