Piezoelectricity

PIEZOELECTRICITY

EVOLUTION AND FUTURE OF TECHNOLOGY

INTRODUCTION

This topic deals with the future perspective of electricity power generation produced from mechanical pressure (including motions such as walking) with the help of “PIEZOCRYSTALS”.

Once the

pressure is

relieved,

electrical current

flows across the

material.

The crystals

become polarized

and produce an

emf or voltage that

is proportional to

the amount of

force

The piezoelectric effect

occurs in certain crystals.

Those that are affected

include quartz, Rochelle

salts and tourmaline.

Thin metal

Quartz

materialMetal

coating

Quartz crystals are found in

watches, filters, injectors.

Rochelle salts, because of their

sensitivity, are favored for audio

applications such as

loudspeakers, headphones and

microphones.

APPLICATIONS

3. BY PLACING PIEZOELECTRIC PILES

BENEATH THE ROAD WE CAN PRODUCE

200KWH PER HOUR ON AN AVG PER KM

OF A SINGLE LANE.

Recently

piezoelectric

floors have

debuted in a

handful of

innovative dance

clubs around the

world.

PIEZOELECTRIC EFFECT

1. Sound waves

striking a PZ

material

produce an

electrical signal

2. Can be used to

detect sound (and

echoes)!

Fig 1

Fig 2

Fig 3

In early 2008, the

East Japan Railway

Company (JR East)

installed

piezoelectric pads in

the flooring at the

ticket gates at a

station in Tokyo

ADVANTAGES

Infrastructure is

not required for

this alternative

energy

harvesting

system.(such as

NTPC…)

A Vast area is

not

required.(such

as solar energy

production…)

Revolutionary feature is that it harvests wasted mechanical energy.

THANK YOU