Self-excited Dynamic Active Antenna

摘要

This paper proposes the Self-excited Dynamic Active Antenna (SDAA) that can detect a contact location between an insensitive flexible beam and an object through observation of the fundamental frequency of the beam in contact with the object. The main part of the SDAA is composed of a flexible beam, one permanent magnet and two electromagnets. The permanent magnet is attached to a part of the beam and two electromagnets are positioned at both sides of the permanent magnet with a small gap.