Water is a very good medium
for propagation of sound waves. Sound generated from a leak, a valve
being operated, a bearing damage or the acoustic fingerprint from a
subsea pump can be picked up by subsea microphones, called hydrophones.
Processing and analysis of the sound is done using Naxys developed
In addition to subsea acoustic monitoring, Naxys has
developed an electric and magnetic monitoring system for subsea
installations. This electric/magnetic system can be combined into the
acoustic system for leak detection and condition monitoring, and results
in a unique possibility for multi-domain subsea montoring.
has focused on a non-intrusive technology utilizing remote sensing
techniques. A non-intrusive system minimizes interference with the
subsea installation being monitored. Hence, the non-intrusive system
does not impose any increase in failure modes on other systems. In
addition, the stand-alone system is flexible with respect to placement
on a subsea template and easy to install using ROV.