A virtual analyzer for piezoceramics´ admittance measurement

Impedance or admittance characteristic must be measured by a spectrum analyzer for piezoceramics in order to gain the electromechanical match at resonance frequency before piezoceramic actuating applications. A virtual analyzer is implemented with an acquisition card inserted into a personal computer and with the LabVIEW tools developed in Windows. While the voltage inputted onto the piezoceramics and the current sampling simultaneously, thus, the instantaneous admittance level relative to frequencies is furnished in the functional screen. The measured results from the virtual analyzer and actual data through a HP-4194A analyzer are compared to validate the performance of the virtual instrument.