Abstract
Unmanned aerial vehicles (UAVs) are used nowadays in a wide range of applications, including monitoring, mapping, or surveying tasks, involving magnetic field mapping, mainly for geological and geophysical purposes. However, thanks to the integration of ultrasound-aided navigation used for indoor UAV flight planning and development in sensorics, the acquired magnetic field images can be further used, for example, to enhance indoor UAV navigation based on the physical quantities of the image or for the identification of risk areas in manufacturing or industrial halls, where workers can be exposed to high values of electromagnetic fields. The knowledge of the spatial distribution of magnetic fields can also provide valuable information from the perspective of the technical cleanliness. This paper presents results achieved with the original fluxgate magnetometer developed and specially modified for integration on the UAV. Since the magnetometer had a wider frequency range of measurement, up to 250 Hz, the DC (Direct Current) magnetic field and low frequency industrial components could be evaluated. From the obtained data, 3D magnetic field images using spline interpolation algorithms written in the Python programming language were created. The visualization of the measured magnetic field in the 3D plots offer an innovative view of the spatial distribution of the magnetic field in the area of interest.
Highlights
Nowadays, unmanned aerial vehicles (UAVs) are used in the military, and in a wide range of civil applications
If we focus on the UAV applications dealing with magnetic field measurement or mapping, the research is mainly focused on the cost-effective airborne magnetic surveys for industrial and geoscientific applications [7] in exteriors
In combination with the knowledge obtained during the research in the area of analysis of small UAV electromagnetic images in a very low frequency range [49] together with the performed magnetic field measurements related to safety [50,51], we proposed the original idea that small UAVs could be used for quick magnetic field mapping and evaluation, outdoors, but thanks to the ultrasonicaided navigation, could be used in the indoor environment as well
Summary
Nowadays, unmanned aerial vehicles (UAVs) are used in the military, and in a wide range of civil applications If we consider their use in aerial work, they can be used, for example, in monitoring, mapping, or surveying purposes in many types of industrial, search and rescue, security, or safety purposes, even in challenging or dangerous conditions [1,2,3,4]. If we focus on the UAV applications dealing with magnetic field measurement or mapping, the research is mainly focused on the cost-effective airborne magnetic surveys for industrial and geoscientific applications [7] in exteriors. Nowadays, geospatial analytics of magnetic fields are usually performed in the outdoor environment [21]
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