Calibration of Megahertz Electromagnetic Systems to Measure the Electromagnetic Response of Objects.

Nowadays, it is not difficult to detect and identify metallic unexploded ordnance, although the detection of plastic and less metallic ones remains problematic. In the case of non-metallic mines, it is better to address the problem as follows: Instead of detecting non-metallic mines, find gaps in the soil where the mine could potentially be located. Such an approach makes it possible to identify areas of soil where there is no mine. Such information is important to a bomb disposal specialist. If, in the soil, the void repeats the shape of a mine, it will be possible to determine the expected electromagnetic echo by considering the electromagnetic parameters of the soil and object discrimination. In real life, relying on such an assumption can be fatal. The mine in the soil may be surrounded by empty space and it will be impossible to discriminate, but the size of the gap and the potential presence of a mine in the area can be estimated. To this end, it is important to develop a new type of electromagnetic sensor that, along with detecting metal objects, can detect hollow areas in the soil. The aim of the master thesis is to create, examine, test and calibrate such a sensor.