An Optical Fibre Depth (Pressure) Sensor for Remote Operated Vehicles in Underwater Applications

Sensors

Romano Capocci¹  Thomas Newe¹  Edin Omerdic²  Elfed Lewis²  Daniel Toal³  Gerard Dooly³  Dinesh Babu Duraibabu³  Gabriel Leen³  Sven Poeggel³ 

[1] Marine Robotics Research Centre, University of Limerick, Limerick V94 T9PX, Ireland;;Mobile &Optical Fibre Sensors Research Centre, University of Limerick, Limerick V94 T9PX, Ireland;

关键词: ROV;    OFPTS;    Pressure;    sensors;    ROV control;    Fabry-Perot;    Fibre Bragg Gratings;   

DOI  :  10.3390/s17020406

来源: DOAJ

【 摘 要 】

A miniature sensor for accurate measurement of pressure (depth) with temperature compensation in the ocean environment is described. The sensor is based on an optical fibre Extrinsic Fabry-Perot interferometer (EFPI) combined with a Fibre Bragg Grating (FBG). The EFPI provides pressure measurements while the Fibre Bragg Grating (FBG) provides temperature measurements. The sensor is mechanically robust, corrosion-resistant and suitable for use in underwater applications. The combined pressure and temperature sensor system was mounted on-board a mini remotely operated underwater vehicle (ROV) in order to monitor the pressure changes at various depths. The reflected optical spectrum from the sensor was monitored online and a pressure or temperature change caused a corresponding observable shift in the received optical spectrum. The sensor exhibited excellent stability when measured over a 2 h period underwater and its performance is compared with a commercially available reference sensor also mounted on the ROV. The measurements illustrates that the EFPI/FBG sensor is more accurate for depth measurements (depth of ~0.020 m).

【 授权许可】

Unknown