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We propose a robot, named Iceberg worm, clinging to lower surface of ice shelf (or iceberg) for ice thickness measurement. The key technologies of the proposed robot are 1) Inverse buoyancy setting and adjustable buoyancy control system; 2) Biomimetic legs and crampons like insects feet; 3) Non-contact laser-ultrasonic ranging system; 4) Acoustic-taxis navigation like positive photo-taxis of bugs...
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