piezoelectricity
TRANSCRIPT
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