16-11-2012, 01:53 PM
PROJECT ON PIEZOELECTRIC CAR
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PIEZO ELECTRIC EFFECT
•Piezoelectricity was discovered in 1880 by Pierreand Paul-Jacques Curie, who found that when they compressed certain types of crystals including quartz, tourmaline, and Rochelle salt, along certain axes, a voltage was produced on the surface of the crystal. This effect is known as piezoelectric effect.
PIEZOELECTRIC GENERATORS
•Piezoelectric generator is nothing but a piezoelectric crystal sandwiched between two metallic electrodes . So when the mechanical pressure/stress is applied on the crystal ,emfis generated.
IMPORTANCE
•This effect is exploited in a variety of practical devices such as microphones, phonograph pickups, and wave filters in telephone-communications systems and for electric power generation etc .ex
•The converse effect is also possible i.ewhen the emfis applied along certain electrical axes in the crystal ,this crystal produces mechanical vibrations .This effect is used in some variety of practical devices such as buzzers, ultra sonic filters and sonar for the production of U.S waves. ex
ADVANTAGES OF THE CAR
1.The batteries in this car are self charged as the car is in motion.Itis due to the power generated by the tires. So only onetime external charging is enough.
2.By using Lead zirconatepiezocrystal we can generate until 100000 volts by small deformations of the tire.
3.Eco friendly i.e, it does not pollute the environment.