The composition and working principles of an acoustic fiber optic monitoring system adopted to forewarn the failure of PCCP (Prestressed Concrete Cylinder Pipe) are described.

介绍了用于PCCP爆管预警的光纤声监测系统组成及原理。

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As if the nation's overexcited and misguided border vigilantes didn't have enough ways to trigger alarms and bedevil the U.S. Border Patrol (whose job is hard enough as it is), University of Arizona researchers have developed Helios, a monitoring system that uses an acoustic sensor to detect movement via fiber optic cables buried beneath the US-Mexico border.

ENGADGET: UA engineers develop 'invisible,' fiber optic border monitoring system