02-02-2016, 03:22 PM
The basic principle used in this setup is piezoelectricity
It is a phenomenon of internal accumulation of charge in crystals in response to external mechanical force applied on it.
Applications of piezoelectricity
Detecting & producing of sounds
Generating voltage
Microbalance
Ultrafine focusing of optical assemblies
Material used:
The material used in piezoelectric element is lead zirconate crystal.
These crystals generate measurable piezoelectricity when they are deformed
about 0.1% of their original dimensions.
These crystals readily release the current when the orientation of crystal is disturbed by mechanical vibrations.
These signals are in turn given to IC 741 (Op-Amp)