Razvoj zračno sklopljenega georadarja za detekcijo eksplozivnih teles na brezpilotnem zrakoplovu : doktorska disertacija

slovenian

doktorska dela

2022

Ground Penetrating Radar (GPR)   Stepped Frequency Continuous Wave (SFCW) principle.   Unexploded Explosive Ordnance (UXO) detection   Unmanned Aerial Vehicle

Univerza v Mariboru, Fakulteta za elektrotehniko računalništvo in informatiko

The doctoral dissertation presents the development of an air-coupled georadar for the detection of explosive devices below the ground surface with combination of an unmanned aerial vehicle. As the weight and autonomy of such an unmanned aerial vehicle is extremely critical this requires special care in the development of such a georadar system. For this purpose, a georadar is developed that emits a continuous wave and works on the Stepped Frequency Continuous Wave (SFCW) method. The use of this method, as well as a carefully designed receiver based on a hybrid analog-digital super-heterodyne architecture, eliminated the need of a transmitter power amplifier. Such an approach has enabled us to create a complete system using integrated electronic components which ensure low power consumption and compact design. Nevertheless, the system offers a resolution in a few centimeters, which allows the detection of even the smallest explosive devices. The system was tested in a laboratory environment as well as on a test polygon in combination with a commercial unmanned aerial vehicle. In order to ensure even greater detection success, we introduced the use of polarization, which extends the existing georadar image to multichannel. Furthermore, we also developed a system for eliminating unwanted reflections, which removes the echo signals already on of the receiver input, and enables to higher the receiver gain to make the weak scatter of targets of interest more visible.

07.08.2023