Based on this research i can more information about piezoelectric sensor. for this link http://www.explainthatstuff.com/piezoelectricity.html i get a new information about piezoelectric sensor. How the Piezoelectric sensor works which mean how the piezoelectric sensor can produce from mechanical energy convert to electrical energy.
For this time i will simplify the process of piezo sensor works:
1. Normally, the charges in a piezoelectric are exactly balanced, even if they are not symmentrically arranged.
2. The effect of the charges exactly cancel out, leaving no net charge on the crystal faces. ( more specifically, the electricity dipole moment- vector line separating opposite charges- exactly cancel one another out.)
4. The effect of the charge ( their dipole moment) no longer cancel one another out and net positive and negative charge appear on opposite.
5. So by the squeezing the sensor , it will be produce a voltage across its opposite faces. And that is called PIEZOELECTRICITY.
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