Understanding the vibration of cables is one of the most common research applications of the Imetrum system. In both the UK and China, the system is used to characterise vibrations in cables known to have excessive movement, including its use for designing the ties used on the Second Severn Crossing.
The system has also been coupled with long range lenses capable of looking at the specific vibration of individual conductors and the dampers clamped to them, to help with investigation of wear leading to conductor breaks.
Quick and safe to set up
Being able to take precise measurements from a safe distance (ground level), offers a strong safety case for adoption. Additionally, there is a considerable time saving by no longer needing to climb pylons to install sensors.
Of course the safety case equally well applies to understanding the movement of the pylon itself, including movement of insulators, and assessing concerns with particular structural members. A number of research establishments worldwide have used the system to assess existing pylons, and new pylon designs. The ability to easily track many points, using the natural pattern of the structure is well suited to the numerous joints on a pylon, enabling relative and absolute displacement measurements to be captured.