抄録
This study is concerned with the development of a piezoelectric embedded transducer, which can detect two or more species at one time. The transducer consists of a cantilever aluminum beam and a piezoceramic patch. The piezoelectric impedance based measurement technique is introduced for detecting a very small bio-species mass. Furthermore, two different types of biomembranes are supposed coated on the beam so that they can detect two kinds of species without causing interference with one another. The problem how to determine the optimal positions for coating the membranes are investigated in detail by FEM analysis. An optimal design consideration is proposed on their mode shapes and is validated experimentally.
