Piezoelectric sensors generate electricity through the piezoelectric effect, where certain crystals, like quartz, produce an electric charge when subjected to mechanical stress, such as pressure or vibration ¹ ² ³:
- When a force is applied, the crystal's structure is deformed, causing a displacement of electric charges within the material.
- This deformation leads to the appearance of an electric potential (voltage) across the crystal, making it behave like a tiny battery.
- The crystal's positive and negative charges become unbalanced, resulting in an electric current flowing when the two faces are connected.
