Recording the Magnetic Field Produced by an Undersea Energy Generating Device: A Low-Cost Alternative

Abstract

This work describes the characteristics of a device capable of detecting the magnetic field generated by a submerged electrical conductor. This low-cost apparatus is based on the open-source Arduino platform and offers the possibility of monitoring magnetic fields generated by undersea cables. Measuring magnetic fields generated by undersea cables facilitates the development of technologies that will harness marine energy potential. The research is based on published parameters of magnetic field values generated by existing submarine cables. A coil was built to simulate an approximate magnetic field at 10 mT. The magnetic field generated by the coil was used as a reference standard. The device developed has a measurement probe built with an array of SS49E Hall effect sensors placed in a straight line and separated 5 cm from each other. A DS18B20 temperature sensor was added to make the necessary corrections and cancel the influence of temperature during the measurements. A microSD card module was attached to store continuous magnetic field measurements. The device was adjusted under strict laboratory conditions. The functionality of the device developed was confirmed by two samplings in the sea. In these samples, the magnetic field generated by the coil was measured in the entire water column from a depth of 3 m to 150 m. Results indicate that the prototype can successfully perform the necessary functions to quantify the underwater magnetic field accurately with about 10 µT accuracy.

Magnetic Gradient Tensor Positioning Method Implemented on an Autonomous Underwater Vehicle Platform

“…Due to the presence of some measurement errors in the actual background magnetic field, a 1% measurement error in the geomagnetic field was introduced during the simulation. The magnetic dipole was placed at (4,5,5), and the measurement system moved along the positive X-direction starting from (4,5,5). The following Figure 5 illustrates a comparison of localization simulation results for the two structures.…”

“…Hence, there is an urgent need in related fields for an effective means of detecting underwater resources. In the vicinity of ferromagnetic materials and energized underwater cables [4], specific magnetic fields are generated. The characteristics of these magnetic fields are influenced by the objects' geometric properties, material composition, frequency attributes of the current, magnitude, and orientation.…”