SENSING SOLUTIONS

CANNARA BRIDGE

Client

We provided a multi-purpose solution in one cable to secure the Cannara Bridge. Our cable included Distributed Acoustic Sensing, Distributed Temperature Sensing, and Structural Health Monitoring to measure strain,

15

NBG Group Experience

40

Countries

65

Structural Health Projects

12k

NBG Group Sensor Build

Introduction

Due to the steep topography of the region, the bridge was built along the coast on artificial land in 1944. In 1979, the collapse of a seawall on the edge of the landing tracks triggered an underwater landslide/tsunami. Fiber optic sensing is the best safety measure to monitor the land for critical coast movement and subsidence.

The Project

The reclaimed land on the Var River Delta was experiencing subsidence and freshwater circulation. We were hired to deliver a method of measuring the strain and movements of the land, and the temperature and acoustics of the freshwater.

Our Trisens cable was the perfect response. It’s an extremely small cable built for multi-purpose sensing applications. The optical fibers are protected by a stainless-steel tube and hermetically sealed. Trisens is built to perform and thrive in environmentally demanding situations.

Key Challenges

Our Solution

Fiber Optic Sensors Used

Sonosens

LightDelta is a single-mode optical fiber with a low water peak and a reduced sensitivity to bends. We make it by the Vapor Axial Deposition method (VAD). 

Trisens

LightDelta is a single-mode optical fiber with a low water peak and a reduced sensitivity to bends. We make it by the Vapor Axial Deposition method (VAD).

Point Sensing Technology

The reclaimed land on the Var River delta was experiencing subsidence and freshwater circulation. We were hired to deliver a method of measuring the strain and movements of the land, and the temperature and acoustics of the freshwater.

What our partners say

Whenever we team up with NBG on a project, we can depend on them being professional, fast, and high-quality. They always take the time to understand the full-scope of every project even when their deliverables only require partial involvement.

Anthony Smith CEO at AP sensing

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