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The piezoelectric effect is an effect in which energy is converted from a mechanical to electrical. It was discovered in 1880 by the brothers Curie. Specifically when a pressure (piezo means pressure in Greek) is applied to a polarized crystal, mechanical deformation results in an electrical charge.

piezoelectric microphones are a good example of this phenomenon. Alternatively, an electrical charge is applied to a polarized crystal, the crystal undergoes a mechanical deformation which can create an acoustic pressure. An example of this is the piezoelectric speakers, which are the cause of the annoying hum of computers.

piezoelectric energy is a renewable energy increasingly used in modern times.

Another example is the piezo lighters. Inside are a piezoelectric crystal is abruptly beaten by the ignition mechanism. This rap causes a high concentration of charge able to create an electric spark that will ignite the lighter.


In this case, we went to the world of nanotechnology, as a team of Princeton University has developed a mini-power generators that work from piezoelectric power and can generate energy through movement.

They consist of a small ceramic material that stores and converts mechanical energy into electrical energy. Covered by a rubber silicone, this generator can be added to many gadgets or devices that require small-scale power generation, but enough to get started.

But one of the most interesting applications are the floors power generators. Applied to areas of high pedestrian traffic or vehicles could easily lead to self-generate energy for lighting the place.

The use of piezoelectric elements on the roads as a way of generating clean energy is certainly a promising idea, but somewhere in the United Kingdom have decided to move from theory to practice. A supermarket chain Sainsbury's in Gloucester has installed power generation plates in the parking lot of the establishment, so that the weight of the vehicles themselves is transformed into electricity, using a hydraulic pump connected to a generator.
The system is capable of providing 30 kW of electricity for "free" with nothing but the passage of its customers, which is the amount needed to power the cash registers. As if this were not enough, the store also collects rainwater and heated by solar panels in the summer for use in bathrooms, making this one of the cleanest shops in the country.

Read more: http://www.techmez.com/2009/06/16/un-supermercado-genera-energia-utilizando-el-paso-de-los-autos/ # ixzz1KHYLjr8a

http://www.dforcesolar.com/energia-solar/efecto-piezoelectrico/
http://www.ojocientifico.com/2010/01/30/nanotecnologia-y-energia-piezoelectrica en-de-silicone bandages
http://es.wikipedia.org/wiki/Piezoelectricidad

http://ltpc.dpa-etsam.com/2009/03/18/luciernaga-piezoelectrica/

http://www.vagoneta.net/2010/04/08/microbelt-eficiente-aerogenerador-piezoelectrico/ http://scitec.nosdom.com/?p=2136