Definition of piezo (pz) electric effect and its application in real time.

1. Pz eff:Some materials have the ability to produce electricity when subjected to mechanical stress.
This is called the piezoelectric effect. This stress can be caused by hitting or twisting the material just
enough to deform its crystal lattice without fracturing it. The effect also works in the opposite way,
with the material deforming slightly when a small electric current is applied. Piezoelectricity was
discovered more than one hundred years ago and has many applications today. It is used in electronic
clocks, gas ovens, inkjet printers, and many other appliances. It also used in scientific instruments
which require
App:Canon was one of the pioneers of the ultrasonic motor, and made the "USM" famous in the late
1980s by incorporating it into its autofocus lenses for the Canon EF lens mount. Numerous patents on
ultrasonic motors have been filed by Canon, its chief lensmaking rival Nikon, and other industrial
concerns since the early 1980s. Canon has not only included an ultrasonic motor (USM) in their DSLRs
but also in the Bridge camera Canon PowerShot SX1 IS.[6] The ultrasonic motor is now used in many
consumer and office electronics requiring precision rotations over long periods of time.
 Canon – USM, UltraSonic Motor
 Minolta, Sony – SSM, SuperSonic Motor
 Nikon – SWM, Silent Wave Motor
 Olympus – SWD, Supersonic Wave Drive
 Panasonic – XSM, Extra Silent Motor
 Pentax – SDM, Silent Drive Motor
 Sigma – HSM, Hyper Sonic Motor
 Tamron - USD, Ultrasonic Silent Drive