How to collect electrical signals and compare piezoelectricity of piezoelectric ceramic crystal?

1. How do the electrical signals generated by the piezoelectric ceramic crystal be collected and displayed?

The electrical signal generated on the piezoelectric ceramic crystal is not very large, so it should be amplified first, then collected, usually using a data acquisition card, and the digital quantity is collected. After that, you can use some software to process, edit and display. Or, just watch it directly through the oscilloscope, just connect it directly to the oscilloscope.

2. After the piezoelectric discs crystal is effectively impacted, is the piezoelectric piece generating electric energy, or is the power generating piece generating electric energy?

This problem, in the view of piezoceramic ring piezo sensor PIEZOHANNAS manufacturers, is a piezoelectric piece, not a power generation piece, because the piezoelectric piece can generate electric energy, and the power generation piece is used to transfer electric charge, which does not generate electrical energy.

3. Piezoelectric ceramic sheets and PVDF materials, which one is more piezoelectric?