Cross Coupling Effect in Multi-Element Composites for Transducer Array Application

Abstract:

A novel three-phase (ceramic, epoxy resin and decoupling material) piezoelectric composite with multi-element in parallel connection has been developed by using dice-fill technology. This kind of composite consists of a large number of elements which can be seen as a single-sound radiation source. The space between elements is determined via a precise method of calculation. The ceramic elements are then cut using precision machinery to achieve exact results. A kind of decoupling material has been developed to decrease the cross coupling effect between elements. The vibration velocity curves of active elements and close elements were measured using a Scanning Laser Vibrometer (Polytec PSV-400). The results indicated that the decoupling materials induced in multi-element composites have a good decoupling effect. Vibration attenuations between adjacent elements are larger than 31 dB at resonance frequency.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 1650-1653
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.1650
• Online since: January 2013
• Authors: Lei Qin, Li Kun Wang, Yu Lu, Jing Jing Zhou
• Keywords: Actuator, Composite, Cross Coupling, Piezoelectric Properties, Vibration Attenuation

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