To demonstrate, we are going to set up a simple 2D axisymmetric model of a piezoelectric device. (This will be discussed later in the blog post.) Using the Terminal Feature An alternate method is to use the Surface Charge Density feature and specify the surface charge to excite the transducer. The Terminal feature and Electric Circuit interface are available with the AC/DC Module or MEMS Module. An additional benefit of the Terminal feature is that COMSOL Multiphysics calculates the available lumped parameters, which can be evaluated after the model is solved.Ī model of a sonic well logging setup with a piezoelectric transducer that transmits and receives sound. This is usually the situation in real-life applications in which a piezoelectric layer is sandwiched between two thin electrode layers so that it can be connected to a circuit. The best way to model a piezoelectric device that acts as both a transmitter and receiver is to connect the transducer to an external circuit using the Terminal feature. Let’s discuss how to use the COMSOL Multiphysics® software to model a piezoelectric device as both a transmitter and receiver.Ĭonnecting a Transducer to an External Circuit in a Piezoelectric Device Modeling these devices often requires transient analyses with time of flight as output. In applications such as ultrasound imaging and nondestructive testing, the same transducer can be used as a transmitter to send a source signal and receiver to detect echoes. Piezoelectric devices are widely used as sources to generate sound waves or receivers to detect acoustic signals.
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