Piezoelectric transducer pressure

[pilafa]

Hi,
Does anyone know if there is an equation to calculate the pressure produced by a piezoelectric transducer (maybe in function of electrical power, density of media, etc).
Thanks,
pilafa

 

[MikeHalloran]

The transducer supplier should have some help available. ... probably in a fairly dense technical document that an ordinary salesperson could not even read.

Off the top of my head, I think that a piezo transducer produces mechanical strain in proportion to electrical charge, and conversely.



Mike Halloran
Pembroke Pines, FL, USA

 

[IRstuff]

Pressure as in sound pressure, or physical pressure?

The latter is usually a design criteria, based solely on the electromechanical properties of the device:

http://www.pi-usa.us/piezo_motion_tutorial/

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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[Strong]

Google: piezoelectric pressure transducer details
What else do you need besides sensitivity mv/Pa or mv/PSI?

Walt

 

[MikeHalloran]

To get units of voltage per unit pressure, you need a charge amplifier, which is strictly speaking a charge to voltage transducer.

Between the charge amp and the piezo, you need gold plated terminals and teflon coax, which you have to bake regularly to keep out atmospheric moisture.

I don't think charge amps are bidirectional, so you need a different box to take a voltage input and pump charge into/out of the piezo to make it move.


Mike Halloran
Pembroke Pines, FL, USA

 

[Strong]

Ah, looking for a force actuator!
Google: piezoelectric actuator force

A lot of information there.

Walt