Bridge weigh-in-motion using fibre optic sensors

Bridge Damage Detection Using Weigh - In - Motion Technology

Multiplexed fibre-optic sensors using ring interferometers

We describe a number of multiplexing techniques which may be used for fibre-optic sensors in which the sensing element is a ring resonator . The basic optical unit comprises a sensing ring resonator connected to a second interrogating ring resonator of nearly equal length, and illuminated by a source of short coherence length. A number of such units may be combined to form an array, using coher...

Fibre Optic Strain Sensors

Although the optical sensing technology has been available for a number of years the recent rapid adoption is due to a breakthrough in the way that optical fibre sensors are deployed. Optical fibres are now being embedded within a glass fibre/epoxy composite carrier to form a robust component suitable for handling offshore. The carrier provides resistance to damage during deployment and from ex...

A Wavelet-based Bridge Weigh-in-motion System

Bridge Weigh-in-Motion systems can be used to estimate vehicle parameters such as velocity, axle loads, or the distance between axles without affecting the traffic. These parameters and the classification of vehicles are necessary to determine vehicle overload and hence may help to reduce risks for road users and road infrastructure and allow optimized planning of maintenance work. The Bridge W...

Fibre Optic Sensors for Selected Wastewater Characteristics

Demand for online and real-time measurements techniques to meet environmental regulation and treatment compliance are increasing. However the conventional techniques, which involve scheduled sampling and chemical analysis can be expensive and time consuming. Therefore cheaper and faster alternatives to monitor wastewater characteristics are required as alternatives to conventional methods. This...