Johan Mattsson_ 埋藏金属物体电磁系统.pdf

1、An active electromagnetic system for underwater vehiclesJOHAN MATTSSONContributors:Mattias Sdow,Phil Heelan,Vemund Thorkildsen,Paul Kopperud and Thorbjrn Rekdal Detection of buried metal objects and cablesMARCH 12,2024Side 2OutlineArgeo Listen-EM receiver systemArgeo Whisper-CSEM systemDetection of

2、conductive objects Positioning accuracy of inactive buried cablesSummaryOutlineArgeo Listen receiver systemARGEOS ROBOTIC TECHNOLOGYA developed and commercial EM-receiver systemEM data testSpecificationsFully integrated EM-receiver sensor systemStable AUV with accurate navigation Reduced noise and r

3、epeatable measurementsFlush mounted electrodes Reduced noiseFlush mounted electrodes Robust systemGeneral noise level 0.01/ApplicationsCathodic protection measurementsDeep Sea Mineral explorationTracking/burial depth of active power line cablesGeneral site surveysOutlineArgeo Whisper CSEM systemARGE

4、OS ROBOTIC TECHNOLOGYAn active Electromagnetic system for subsea vehiclesApplicationsDetection of buried conductive objects(UXO etc.)Tracking/burial depth of passive power line cablesDeep Sea Mineral explorationSpecificationsMax output current 20 A,Max power 300 W Possibility to transmit frequency c

5、ontents between 0.5-100 HzElectrode plate separation 5.5 mCan be implemented on ROV/AUVFour different patents grantedOutlineDetection of conductive objects METHODOLOGYDetection of conductive objects -Basic principlesDetection of conductive objects -A concept testTest site Metal object towed 4 m abov

6、e seafloorObject=stainless steel cylinder 2 m length and 0.5 m diameterClosest lateral distance from object to sensor platform was 3 mMeasurement platform on the seafloorObject towing line 4 m above seafloorNorthMeasurement platform 1.5 metersWhisper source electrodesA 3-axes Mag