2003年10月15日 · This paper provides an overview of the intensity modulated and spectrometric fiber optic sensors and techniques to assess the condition of existing structures in order to enhance the durability of the new bridges, increasing lifetime and reliability and decreasing maintenance activities.

2003年11月1日 · This paper provides an overview of the intensity modulated and spectrometric fiber optic sensors and techniques to assess the condition of existing structures in order to enhance the durability of the new bridges, increasing lifetime and reliability and decreasing maintenance activities.

the µm/m strain range, the fiber optic method applied here facilitates a long-term monitoring using the sensors implemented into the bridge structure. In contrast to the permanently installed fiber optic sensors, the typical laser scanning approaches are only suitable for short-term measuring

The tests were performed by a portable prototype instrument exploiting stimulated Brillouin scattering in optical fibers for deformation and temperature measurements. The optical fiber sensor was able to provide the strain distribution along a supporting beam of the bridge with a spatial resolution of 3 meters and a strain resolution of ±15 με.

This paper provides an overview of the intensity modulated and spectrometric fiber optic sensors and techniques to assess the condition of existing structures in order to enhance the durability...

2023年8月29日 · Distributed fiber optic sensing (DFOS) is a well-established technique for monitoring slow strain changes of structures. However, until recently such methods were not suitable for the dynamic monitoring of bridges due to their low measurement rate of 0.1 Hz or less.

1997年1月1日 · Fiber-optic Bragg grating strain sensors hold a great deal of potential for structural monitoring because of their exceptional stability and demonstrated potential for long-term monitoring.

Three phases of the bridge life were monitored: concreting and thermal shrinkage, load test with heavy trucks and long term deformations. This contribution presents the fiber optic sensor design, the installation technique and the preliminary results obtained on this bridge. 1. INTRODUCTION.

Fabry-Perot sensors are available to provide local strain measurements, but SOFO sensors can provide a very accurate and reliable measurement of the relative displacement of any two points chosen in a structure at distances from 20 cm to 30 metres.

1997年1月1日 · Fibre Bragg grating (FBG) sensors have emerged as a reliable, in situ, non-destructive tool for monitoring, diagnostics and control in civil structures. The versatility of FBG sensors represents a key advantage over other technologies in the structural sensing field.