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The paper presents a new version of the ROVIBAT (ROmanian VIrtual BAT) sonar head, based on airborne transducer module (ATM) with five discrete frequencies (40, 125, 200, 228 and 300 kHz). The sonar head is used for navigation of the robots and for ultrasonic image generation of the explored environment. The previous versions of the ROVIBAT heads, i.e. 00 to 04, have used a single working frequency...
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