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Marine Magnetics - Model Explorer v.AUV -Magnetometer for AUV Integration
The Explorer v.AUV is a specialized magnetometer designed for integration with autonomous underwater vehicles (AUVs), offering neutral buoyancy to maintain a precise position close to the sea floor. This capability allows the Explorer v.AUV to effectively follow underwater topography and detect unexploded ordnance (UXO). It was tested alongside the Iver2 AUV in San Diego Bay, demonstrating proficiency in identifying small and near-surface targets, with gradient maps clearly showing UXO presence. It employs advanced algorithms to convert total field measurements to gradient data, important for detailed underwater surveys. This magnetometer enhances the ability to carry out underwater surveys despite complex geological backgrounds and environmental challenges. With low power consumption and minimal drag, it is exceptionally suited for deployment with various AUV systems, enabling effective detection of targets weighing as little as 1kg, crucial in subsea exploration and engineering applications.Most popular related searches
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UXO Trial San Diego Bay
We tested integration of Explorer v.AUV with the Iver2 AUV at a blind UXO trial for the Geneva International Centre for Humanitarian Demining, Switzerland, in San Diego Bay.
Survey Parameters
- Two 250m x 120m surveys were conducted over the same area.
- One before seeding with simulated UXO targets, and the second after seeding, on the following day.
- The targets ranged in size from 60 mm to 160 mm. The smallest target was 1 kg.
Results
The total-field map (figure 1) shows significant geological background obscuring small near-surface targets and a small pipeline in the lower half of the block. The unseeded and seeded area’s gradient map clearly show 10 UXO targets. It was confirmed that all ten UXO were reliably detected after seeding.
Gradient Data From A Single Explorer Sensor
Our specialized algorithms convert total field to total gradient data that:
- improves target definition
- suppresses background noise
and with Iver’s precise control of position:
- yields unparalleled analysis
Explorer v.AUV Includes
- Overhauser sensor
- Electronics module with Larmour Counter
- Leak detector
- Depth rating 1000m (1420 psi)
- Trim kit
- BOB data acquisition and visualization software
- Tow cable, length to be determined by integration
- A custom shipping case
Performance
- Operating Zones : Worldwide. Explorer collects accurate results regardless of how it’s pointed in relation to Earth’s magnetic field.
- Absolute Accuracy : 0.1 nT
- Sensor Sensitivity : 0.02 nT
- Counter Sensitivity : 0.001 nT
- Resolution : 0.001 nT
- Dead Zone : NONE
- Temperature Drift : NONE
- Power Consumption : 2 W
- Range : 18,000 nT to 120,000 nT
- Gradient Tolerance : Over 10,000 nT/m
- Sampling Range : 4 Hz – 0.1 Hz
- Communications : RS-232, 9600 bps
- Power Supply : 9-30 VDC or 100-240 VAC
Neutrally Buoyant Explorer Magnetometer
- Length : 86.5 cm (34 in)
- Diameter : 7.6 cm (3 in)
- Weight in Air : 3.7 kg (8.2 lbs)
- Weight in Water : <10 g (0.4 oz)
Neutrally Buoyant Tow Cable
- Conductors : Four + Shield + Floatation outer jacket
- Breaking Strength : 112 kg (250 lbs)
- Outer Diameter : 1.3 cm (0.51 in)
- Weight in Air : 139 g/m (9.3 lb/100 ft)
- Min Bend Radius : 140mm (5.5in)
- Max Depth Rating : 1000 m
- Average Lengths : 5 m - 10 m (depending on AUV size or application)