对隧道的持续安全监测

Tunnel Monitoring with Optical Sensor Technology

Tunnels are at the core of our infrastructure. They are found in large cities, mountains and even underwater. They provide connections and shorten distances. But how safe are they?

Today, modern monitoring systems allow reliable condition monitoring of tunnels using fiber Bragg technology.

Mechanical deformations in a tunnel can present a significant safety hazard particularly during construction work on the tunnel itself or in its immediate surroundings. It is essential to quickly check the stability and reliability of the structure.

When choosing the sensor technology to be used for tunnel monitoring it is necessary to consider the following challenges:

Will the sensors be able to reliably provide the required signal throughout the intended time – both in the short term and in the long term?
Long cables are usually used in tunnels. Can you, therefore, guarantee the quality of the measurement signal even over long distances?
Can the monitoring system be installed, without affecting traffic in the tunnel?
And, of course, the fundamental question: what measurement quantities and underlying models are suitable, for example, to trigger an alarm in the event of a problem?

For all the above, optical sensor technology, based on fiber Bragg technology, has developed into a powerful alternative to conventional monitoring systems.

光纤布拉格光栅技术：最理想的解决方案

光纤布拉格传感器用光测量物理量，如应变。除了出色的长期稳定性外，该技术还具有另一个主要优势：它可以使测量值进行远距离传输，而且几乎没有测量质量的损失。此外，一个光波导可以容纳几个光纤布拉格传感器，从而将建立监测系统所需的努力降到最低。这是一个至关重要的方面，特别是在监测通常有许多公里长的隧道时。此外，该系统可用于收集隧道正常运行期间的测量数据，而不会干扰交通。

HBK提供隧道监测解决方案，使用户能够充分利用使用光纤布拉格传感器进行隧道监测的优势。