Piezoelectric device (Piezo Device) refers to a device that uses piezoelectric elements. Piezoelectric devices expand and contract when voltage is applied, and this property is used for precise positioning. These are called piezo actuators or piezo stages. High voltage is used because the higher the voltage applied to the piezo element, the larger the deformation. However, it does not require a large amount of power because current hardly flows through it. Piezoelectric motors driven by high-frequency voltage have also been commercialized.

Conversely, when a piezoelectric element is subjected to a force (deformation), a voltage is generated. This property is called piezoelectric sensor.

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