| 초록 |
In this paper, a new acoustic emission system utilizing two AE sensors and its application to the field measurements are described. One of the sensors, called active AE sensor, is directly attached onto rock while the other one, called dummy AE sensor, is detached from the rock surface and set next to the active AE sensor. This AE counting system is named as AD system. The AD system measures acoustic emissions through the active and dummy sensors simultaneously. If AE signals counted by the dummy sensor, it is interpreted as noise signals and such AE counts is omitted from data counted by the active AE sensor. This method has been applied to the landslide of Babadag town in Turkey since 2001. It is shown that this AD system can increase the reliability of the AE field measurement. |
