Piezoelectric resonators are widely used in frequency reference devices, mass sensors, resonant sensors
(such as gyros and accelerometers), etc. Piezoelectric resonators usually work in a special resonant mode. Obtaining
working resonant mode with high quality is key to improve the performance of piezoelectric resonators. In
this paper, the resonance characteristics of a rectangular lead zirconium titanate (PZT) piezoelectric resonator are
studied. On the basis of the field-programmable gate array (FPGA) embedded system, direct digital synthesizer
(DDS) and automatic gain controller (AGC) are used to generate the driving signals with precisely adjustable
frequency and amplitude. The driving signals are used to excite the piezoelectric resonator to the working vibration
mode. The influence of the connection of driving electrodes and voltage amplitude on the vibration of the
resonator is studied. The quality factor and vibration linearity of the resonator are studied with various driving
methods mentioned in this paper. The resonator reaches resonant mode at 330 kHz by different driving methods.
The relationship between resonant amplitude and driving signal amplitude is linear. The quality factor reaches
over 150 by different driving methods. The results provide a theoretical reference for the efficient excitation of the
piezoelectric resonator.
WANG Zhenyu (王振瑜), WU Xiaosheng * (吴校生), SHU Shengzhu (叔晟竹)
. Resonance Characteristics of Piezoelectric Resonator Based on Digital Driving Circuit of Field-Programmable Gate Array[J]. Journal of Shanghai Jiaotong University(Science), 2019
, 24(1)
: 1
-6
.
DOI: 10.1007/s12204-019-2034-1
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