Exact Computer Modelling: A Tool for the Design of Imaging Transducers
The piezoelectric transducer is an essential component of acoustical imaging systems. These transducers have a major influence on the quality of ultrasonic images in diagnostic ultrasound, nondestructive testing, or acoustic microscopy. In recent years, various transducer types have entered the market due to a steadily growing field of applications. For example, medical imaging demands for phased array antennas used in colour flow doppler machines as well as for miniaturized transducers for intracorporal applications. Another trend in medical imaging leads to high resolution systems operating at frequencies above 10 MHz to cover applications, such as imaging of skin deseases. This large diversity of novel transducers demands for a sophisticated transducer development with high standards in respect to quality and rapidness. In order to avoid lengthy and cost-intensive experimental trial and error, a modern transducer development should be based on computer aided design (CAD). The central part of this CAD is transducer modelling, which will be discussed here.
KeywordsBoundary Element Boundary Element Method Acoustic Field Piezoelectric Transducer Finite Element Method Result
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