This document discusses generating electricity from walking using piezoelectricity. It begins with an introduction to piezoelectricity and how mechanical stress on certain materials generates a voltage. It then describes proposals to install piezoelectric devices in floors in places with heavy foot traffic, like train stations, to convert the kinetic energy of walking into electricity. The document provides background on the history and discovery of piezoelectricity and outlines some applications that use the effect, such as ignition systems and watches. It concludes that harvesting energy from footfalls using piezoelectric flooring could provide a renewable source of power.

2. POWER GENERATION FROM
WALKING ON FLOORS
Presenting by :
T.ANILKUMAR
13JU1A0203
3RD E.E.E.
MARKAPUR

3. CONTENTS :
 ABSTRACT
 INTRODUCTION
 POWER GENERATION FROM FLOOR
 WHAT IS PIEZO ELECTRICITY
 HISTORY OF PIEZO ELECTRICITY
 WORKING OF PIEZO ELECTRICITY
 APPLICATIONS OF PIEZO
 CONCLUSION

4. ABSTRACT :
 Energy crisis has become a major problem in 21st century
to meet the demand we have to increase the generation
of electrical energy .
 By using piezo materials we can generate electricity.
 The word piezoelectricity is derived form the Greek word
“piezo” or “piezein” which mean “to squeeze” or press.

5. INTRODUCTION :
AIM :
 Introducing a piezoelectric energy sources device
which converts mechanical energy into electrical
energy.
 Day To day increasing population and lessen of
conventional sources.
 We must depend on non conventional sources for
power generation ,so go to generating power by
piezo electric sources.

6. POWER GENERATION FROM WALKING
FLOOR
 Energy from walking motion to be captured piezo
electric devices must be installed the floor in
terminal buildings.
 This energy from foot traffic this energy send back
to power grid through invertors in order to convert
DC to AC power.
 In train station installed gate area it generates
electricity from shoes striking a piezo electric pad
under a floor tile .
 This energy creates voltage that can be used to
power lighting systems.

8. POWER GENERATION FROM
WALKING FLOORS

9. WHAT IS PIEZO ELECTRICITY
. Piezo electricity is the appearance of an
electric potential (voltage) across the sides
of the crystal when you subjected it to the
mechanical stress (by applying pressure)
. Convesely , a mechanical deformation is
produced when an electric field is applied

10. HISTORY OF PIEZOELECTRICITY
 Pierre curie & jacques curie ,two
French physicists who were also
brothers, first discovered the
piezoelectric effect in1880.
 Pierre curie would later shared the
noble prize with his wife Marie curie
for their work on radiation
 After, Lippmann made researchs on it
 And, finally in early of twentieth
century that practical devices began
to appear

11. WORKING OF PIEZO
ELECTRICITY
 Normally, the charges in a piezoelectric crystal are exactly
balanced, even if they're not symmetrically arranged.
 The effects of the charges exactly cancel out, leaving no net
charge on the crystal faces. (More specifically, the electric
dipole moments—vector lines separating opposite charges—
exactly cancel one another out.)
 If you squeeze the crystal (massively exaggerated in this
picture!), you force the charges out of balance.
 Now the effects of the charges (their dipole moments) no
longer cancel one another out and net positive and negative
charges appear on opposite crystal faces. By squeezing the
crystal, you've produced a voltage across its opposite faces—
and that's piezoelectricity!

12. SOME PRACTICAL RESULTS OF
PIEZO ELECTRICITY

13. APPLICATIONS
 Some piezoelectric crystals can produce enough voltage
to create a spark to ignition systems
 Piezoelectric crystals are used in electronic clocks and
watches to maintain the time and provide alarm noise
 Generates an AC voltage when applied to mechanical
stress
 Electric cigarette lighter pressing the button causes a
spring loaded hammer to hit a piezo electric crystal.
 It produces high voltage current that flows across a spark
gap thus heating and igniting the gas.
 Now a days many types of gas burners have built in
piezo based ignition systems

14. CONCLUSION
 In this era of increasing energy costs and
decreasing supplies of fossil fuels become vital high
priority projects for modern society.
 Renewable sources of energy sources of power
such as fossil fuels.
 It is most advanced green generation technology
and is low cost and broad generation.

15. REFERENCES :
 ACADEMIA
(https://www.academia.edu/9904268/POWER_GEN
ERATION_USING_PIEZOELECTRIC_MATERIAL)
 WIKIPEDIA
(https://en.wikipedia.org/wiki/Piezoelectricity)
 INSTRUCTABLES
 (http://www.instructables.com/id/Electricity-from-
walking/)