Piezo Vibration help

[piezothing]

Hi! I’m working on a project to make a piezoelectric film vibrate to give somewhat of a cleaning effect (complicated way to clean). I’m looking for any kind of tips when dealing with something like this. My group has looked into buzzers and all kinds of avenues but we’re kind of stuck to this idea of making the film vibrate. The film also has to be a decent size so a lot of voltage+high frequency? Currently, our circuit consists of a 120 plug into a psu that converts to DC which then would feed a small amplifier (needs about 8V but not much more apparently) and then into a step up/step down transformer than then is clamped onto the film along the electrodes. We had it (sort of) working at some point and it has seemed to fall apart like this and we’re not really sure where. We need a new amplifier for sure with this set up but kinda wanna see if there would be a better (simpler) way to do this. Thank you for any help.

 

[MarkT]

Can you provide a diagram of the geometry - buzzers simply have electrodes on either side so the electric field strength is high with low voltage due to the thinness of the plate. So I don't understand the comment "The film also has to be a decent size so a lot of voltage+high frequency?".

The frequency depends on the vibration frequency, i.e. the vibration mode you are wanting.

What sort of piezoelectric material are you using - normally they are high-K ceramics and very fragile in thin films (like glass).

How are you plating the electrode metalization onto the piezo film? And attaching wires?

And finally xyquestion: Are you trying to re-invent an ultrasound bath?