James Fisher Testing Services (JFTS) has successfully designed and installed a wireless anemometer system across the N25 bypass on the River Barrow Bridge, New Ross , Ireland.  

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The wireless system has been designed specifically for use on projects where access is limited and the use of a hardwired system with a physical connection to a central Data Acquisition Unit (DAU) would be expensive, impractical or unachievable.

 

The solution for Barrow Bridge

For the application at Barrow Bridge, a system of six wireless anemometer nodes has been applied, with each node connected to one of the travellers used to construct the bridge and to the central crane.

All the nodes are wirelessly connected to the DAU. The system allows for the reliable transmission of data across significant distances, and in this instance the furthest anemometer on the west bank communicates with the gateway 1km away with only a 3db drop in signal.

Each wireless node has its own Uninterrupted Power Supply (UPS) to ensure continuity of measurement during generator downtime or maintenance, ensuring the reliability of the system.

Data from the nodes is fed into a Graphical User Interface (GUI) that provides real-time reporting and management information.  The GUI is based on JFTS’ Smart Asset Management System (SAMS), which forms the basis of all of our integrated structural health monitoring applications, including the comprehensive BridgeWatch solution. The entire system is built to the highest standards and designed in-house by JFTS to meet the specific needs of the project. Each component is CAD designed and approved with the client prior to assembly and calibration, with all mountings conforming to Eurocode 1 and 4 for wind loading and steel structures.

 

Key outcomes

The system was successfully installed across the bridge structure in one day by an experienced JFTS instrumentation and monitoring engineer, with the system going live at the start of April, 2018

Now fully operational, the system allows the project team to accurately measure wind conditions across the site, improving safety and ensuring that the team can take appropriate action when conditions exceed acceptable parameters.  Historical data can be retrieved locally for any forecasted events, making it possible to build an auditable record of weather events throughout a given period.

Because the system uses the SAMS platform,  it is possible to add additional sensors and monitoring capabilities at any point in the structure’s lifespan. Due to this capability, as construction progresses the anemometer system will be integrated into the long term structural health monitoring system for use on the completed bypass over the course of its operational life.

 

Key benefits

  • Wireless transmission allows for installation on a wide range of limited access sites 
  • Real-time reporting of site wind conditions, with automated reporting and historical data retrieval 
  • Conforms to Eurocodes 1 and 4 
  • Independent, uninterrupted power supply 
  • Accurate data allows informed management decisions 
  • Expandable SAMS platform allows for additional capability if required
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