20-09-2016, 11:13 AM
1455282834-EnergyPowergenerationusingfootstepmethodP.BalajiIIEEE.pdf (Size: 261.05 KB / Downloads: 99)
Synopsis:
In this project We are
generating electrical power as
non_conventional method by simply
walking or running on the foot step.
Non-conventional energy system is
very essential at this time to our
nation. Non-Conventional energy
using foot step needs no input power
to generate the output of the electrical
power. This project using simple
drive mechanism such as rock and
pinion assemble and chain drive
mechanism.
For this project the conversion
of the force energy is converted into
electrical energy. The control
mechanismcarries the rack and pinion,
D.C geberator, battery and invertor
control. We have discussed the
various applications and further
extensions also.
Piezoelectric Material: Core
Material of
Piezoelectric crystal such as quartz
exhibits electromechanical resonance
characteristics that are very stable
with time and temperature and highly
selective (having high Q factors).
Piezo electric effect
Rochelle salt exhibits much piezoelectric
activity but mechanically very weak and
hence used in microphones. Tourmaline has
less piezoelectric activity but mechanically
very strong and much expensive and hence
used at high frequency.
Quartz crystal is the best crystal as it has
piezoelectric activity as of Rochelle salt
and is mechanically strong as tourmaline. It
is less expensive and can be found in nature
easily and hence it is used for many purposes
like oscillators, radio transmitters and to
produce electricity
The technology just keeps getting better, too.
The combination of silicone and nano
ribbons of lead zirconate titanate to create
PZT, an ultra-efficient piezoelectric material
that can convert up to 80 percent of
mechanical energy into electricity. PZT is
100 times more efficient than quartz. It's so
efficient, in fact, that the material could be
used to harness energy from the minute
vibrations found in items like shoes and clothing. That means a piezoelectricequipped
shirt could potentially charge up
your cell phone after a day of activity
V.WORKING
The working is based on the concept
of capturing the unused energy
surrounding any system and
converting it into electrical energy
that can be used to extend the
lifetime of that system by providing
energy through backup. The
piezoelectric plates will be placed
under the non-conducting material
(hard rubber) and the pressure
created by the pressure such as
footsteps (in PZR) and waterfall
pressure (in PZW) will produce
energy which can be stored and
utilized as mentioned.
The figure (Fig 1) illustrates the
piezoelectric arrangement. The
piezoelectric elements are in their
various forms and configurations are
designed to operate near resonance.
Resonance may vary as a function of
number of properties of Piezo
materials being employed. These
may include the size, shape, density
and other physical parameters of a
particular configuration for elements
being used. Electrical contacts or
coupling elements used in the figure
are coupled to suitable electrical
leads, which are electrically coupled
to the piezoelectric element.
The polarity of charge depends
upon whether element is under
compression or tension as a result
of applied force. If the element is
subjected to an applied compressive
force its polarity will be positive and
due to applied tensile force it will be
negative. This element generates the
electrical charge to the voltage
limiter. Voltage limiter is the
back to back zener diodes. It
provides the return channel through which electric charge may flow to
the piezo unit to prevent the
depolarization of the piezo element.
The return channel is provided to
work in either polarity mode.
Voltage limited electrical charge is
coupled electrically to bridge
rectifier. This pulsating DC from
rectifier is coupled to the
capacitor filter which efficiently
serves as ripple filter. This rippled
free DC obtained from filter is
provided to shunt type voltage
regulator, to regulate voltagewhich
advantageously coupled to storage
element which can be a battery or a
capacitor.
This is embodiment of single piezo
electric unit. For large scale production,
multiunit piezo electric Array is utilized by
plurality of elements. More preferable
stack Array arrangement passes the
applied force through all layers forming
piezoelectric elements in the Array thus
causing the voltage to rise.
The Array consists of the given type
of subsystem embodiments which are
eclectically coupled at nodes so as to form a
voltage additive series circuit
arrangement. The summed electrical charge
is input to the regulator by the way of
nodes. This output is stored in one or more
electrical charge element. Finally the
generated, regulated, conditioned and stored
electrical charge of the system is available
for use by external circuitry. The
conditioning circuitry is preferably of
relatively low impedance to more efficiently
capture the generated charge.
CONSTRUCTION
A very small percentage (about 5%) of that
energy makes the tiles glow, while the
remaining 95% powers the tiles’ environs,
ranging from street lights to digital
information displays to other surrounding
electronics.
Constructed from marine grade stainless steel and
recycled materials, the surface (which comes in a
variety of choice colors) of each slab features the
rubber from old tires, and the internal components
are made from recycled aluminium. Whenever a
slab is stepped on it emits a glow – this not only
informs the passerby of their contribution, but also
reinforces a sustainable attitude and an increased
awareness of the energy that is continually created
and expended by each individual
ADVANTAGES
1.Power generation is simply walking on the
step
2.Power also generated by running or
exercising on the step.
3.No need fuel input
4.This is a Non-conventional system
Battery is used to store the generated power
APPLICATIONS
Power generation using foot step can
used in most of the places such as
1. Colleges,
2. Schools,
3. Cinema theatres,
4. Shopping complex
5. Railway stations
6. Airports, BUSTANDS