![]() ![]() Due to the extremely small distances involved, the piezo motor is viewed as a high-precision replacement for the stepper motor. ![]() Piezoelectric motors:Piezoelectric elements apply a directional force to an axle, causing it to rotate.Piezoelectric sensors especially are used with high frequency sound in ultrasonic transducers for medical imaging and also industrial nondestructive testing (NDT).The portable sparkers used to ignite gas stoves work the same way, and many types of gas burners now have built-in piezo-based ignition systems. The best-known application is the electric cigarette lighter: pressing the button causes a spring-loaded hammer to hit a piezoelectric crystal, producing a sufficiently high-voltage electric current that flows across a small spark gap, thus heating and igniting the gas.Unlike a conventional transformer, which uses magnetic coupling between input and output, the piezoelectric transformer uses acoustic coupling. A piezoelectric transformer is a type of AC voltage multiplier.It also finds everyday uses such as acting as the ignition source for cigarette lighters, and push-start propane barbecues, as well as being used as the time reference source in quartz watches. It forms the basis for a number of scientific instrumental techniques with atomic resolution, the scanning probe microscopies, such as STM, AFM, MTA, and SNOM. ![]()
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