Watch the innovative use of combined optical displacement sensors and tilt sensors to safeguard Spanish tunnels during a major engineering programme.

This monitoring solution comprised of a combination of tilt sensors and optical displacement sensors (ODS) to detect rotational movement and convergence.The ODS method was novel in this application and provides a number of advantages over laser or optical techniques.

Data from the various sensors were transferred from the site via a GeoWAN gateway located outside the tunnel. With no mains electricity available, an advantage over alternative technologies was the ability to power the system using solar panels.

Easily installed by non-specialists, robust enough to last many years without maintenance and with no cables to interfere with other infrastructure, Senceive wireless remote monitoring has proved to be an effective solution.

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