About piezoelectric matching circuit

[renoso92]

I am a final year student in doing a fyp about using piezoelectric to charge a battery. I have researched lot of literature which said it does not have enough power to charging battery in a reasonable range.

However, it is not my concern recently. What I may concern is that how can I design a matching circuit to maximize the power in my harvesting circuit. My questions are shown below.
Q1) Because I want to implement a buck-boost converter in my circuit, how can I measure its input impedance(i.e. load impedance from piezoelectric on input side )?
Q2) Given that I know the internal capacitance of my piezoelectric material and the input impedance , how can I design a matching circuit at middle?

 

[Warpspeed]

. I have researched lot of literature which said it does not have enough power to charging battery in a reasonable range.

There is your answer right there.