 |
| Titel |
A custom acoustic emission monitoring system for harsh environments: application to freezing-induced damage in alpine rock walls |
| VerfasserIn |
L. Girard, J. Beutel, S. Gruber, J. Hunziker, R. Lim, S. Weber |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
2193-0856
|
| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Instrumentation, Methods and Data Systems ; 1, no. 2 ; Nr. 1, no. 2 (2012-11-05), S.155-167 |
| Datensatznummer |
250000168
|
| Publikation (Nr.) |
 copernicus.org/gi-1-155-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| We present a custom acoustic emission (AE) monitoring system designed to
perform long-term measurements on high-alpine rock walls. AE monitoring is a
common technique for characterizing damage evolution in solid materials. The
system is based on a two-channel AE sensor node (AE-node) integrated into a
wireless sensor network (WSN) customized for operation in harsh
environments. This wireless architecture offers flexibility in the deployment
of AE-nodes at any position of the rock wall that needs to be
monitored, within a range of a few hundred meters from a core station
connected to the internet. The system achieves near real-time data delivery
and allows the user to remotely control the AE detection threshold. In order
to protect AE sensors and capture acoustic signals from specific depths of
the rock wall, a special casing was developed. The monitoring system is
completed by two probes that measure rock temperature and liquid water
content, both probes being also integrated into the WSN. We report a first
deployment of the monitoring system on a rock wall at Jungfraujoch,
3500 m a.s.l., Switzerland. While this first deployment of the monitoring
system aims to support fundamental research on processes that damage rock
under cold climate, the system could serve a number of other applications,
including rock fall hazard surveillance or structural monitoring of concrete
structures. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|