Resonant Frequency shift of bimorph piezo structure

[bright1117]

Hi, folk~

I fabricated bimorph piezoelectric shear stress sensors.

When air flow applied, there were resonant frequency shifts to left side (decreasing) and impedance decrement in resonant frequency as well .

So even though I am suspecting that kinds of results as because of damping effect (from shear force) on the Piezo sensor, I am not sure my hypothesis would be correct and how do prove my idea with electromechanical (or mathematical) modeling.

If you guys have another ideas or something helpful comments, please let me know..HELP ME PLZ...

Thank you in advance.

 

[Achy47]

Hello,

Thank you for sharing your interesting results with us. It sounds like you have fabricated some bimorph piezoelectric shear stress sensors and have observed some interesting responses when air flow is applied. Your hypothesis that the results could be due to a damping effect from shear force on the sensor is a valid one.

To further investigate and prove your hypothesis, I would suggest using electromechanical modeling. This would involve creating a mathematical model of your sensor and simulating the effects of shear force on it. This will allow you to compare the simulated results with your experimental results and see if they match up.

Another approach you could take is to conduct further experiments with your sensor, varying the air flow and measuring the resulting resonant frequency shifts and impedance changes. This will help you gather more data and strengthen your hypothesis.

Additionally, you could consult with other experts in the field and get their insights and suggestions. They may have encountered similar issues and could offer helpful advice.

Overall, it is important to continue exploring and testing your hypothesis in order to gain a better understanding of the underlying mechanisms causing the observed results. I wish you all the best in your research and hope you are able to find a satisfactory explanation for your findings.