Instrumented strakes and fairings for subsea riser and pipeline monitoring
View Patent ↗A vortex induced vibration suppression system for use on a subsea riser system having either a stake or fairing component includes at least one fiber optic sensor mounted on the component. The fiber optic sensor associated with the riser includes at least one sensor for producing a sensor signal. The system may include a plurality of sensors and the plurality of signals produced thereby are combined at a multiplexer for generating a single, composite sensor signal. The signal may be monitored in real time or near real time for observing and monitoring the reaction of the subsea riser to conditions inducing vibration.
1. A vortex induced vibration suppression device for use in combination with a subsea riser system, the suppression device for the riser system comprising:
a. A riser;
b. An element mounted external of and secured to the riser;
c. At least one sensor mounted in the vicinity of the element, the sensor including an output cable for transmission of a sensor signal produced by the sensor, the sensor being adapted for compensating for ambient temperature conditions at the point of the location of the sensor;
d. A processor for receiving the sensor signal, for producing a processed signal; and
e. Said at least one fiber optic sensor having a Bragg grating with a reflectivity of greater than 4%.
2. The suppression device of claim 1 , wherein the fiber optic sensor is an electrical based sensor.
3. The suppression device of claim 1 , wherein the fiber optic sensor has an accelerometer.