Design of a Fast Lateral Piezoelectric Coefficient Measurement System
Among various parameters of piezoelectric ceramics,the piezoelectric coefficient directly reflects the energy conversion capability of piezoelectric materials,thus becoming a crucial indicator for evaluating the piezoelectric performance of piezoelectric materials.This design is based on the inverse piezoelectric effect of piezoelectric crystals.A low-frequency triangular wave is generated through a Field-Programmable Gate Array(FPGA),which is then amplified by an operational amplifier OP07,transmitted to a high-voltage amplifier,and ultimately loaded onto the tested piezoelectric ceramic object.Under external force,the tested object undergoes small deformations,which are measured by a laser triangulation sensor.Finally,the piezoelectric coefficient is calculated in a lightweight integrated development environment.Communication between the host computer and FPGA is conducted through a serial port.This measurement system boasts advantages such as simple operation,repeatable measurements,relatively high precision,and low computational complexity.
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