This document discusses a footstep power generator that converts the wasted energy from human footsteps into electrical energy using piezoelectric materials. It begins by introducing piezoelectricity and how pressure can generate electric fields in certain materials. It then provides a block diagram and explanation of how the device works, using piezoelectric materials attached to a spring-loaded platform to generate electricity from footstep vibrations. Applications discussed include using these generators in sidewalks, gyms, workplaces and smart highways to harness wasted kinetic energy.

1. PANT INSTITUTE OF
ENGINERRING
AND TECHNOLOGY
SNEHDEEP KUNWAR
160605
ELECTRICAL ENGINEERING
SECOND YEAR

2. CONTENTS
 Introduction
 Need of the system
 Principle
 Block Diagram
 Working
 Applications
 Advantages & Disadvantages
 Recent Efforts
2

3. INTRODUCTION
 Walking is the most common activity in human life.
 When a person walks, he loses energy to the road.
 This energy can be tapped and converted in the usable form such as in electrical
form.
3

4. NEED OF THE SYSTEM
 The utilization of waste energy of foot power with human motion is very
important for highly populated countries.
 India and China where the roads, railway stations, temples, etc. are all over
crowded and millions of people move around the clock.
4

5. AN ALTERNATIVE ENERGY
SOURCE
 Footsteps are an untapped
natural resource.
 The Challenge – convert
footstep energy to electrical
energy.
 The Solution – using
piezoelectric material.
5

6. MEANING….
 The meaning of the word “piezoelectric” implies
“pressure electricity”- the generation of electric field by
applying pressure.
 Piezoelectricity is observed if a stress is applied to a
solid, like by bending , twisting or squeezing it.
6

7. BASIC PRINCIPLE
 When a pedestrian steps on the top plate of the device, the plate will dip
down slightly.
 The downward movement of the plate results in rotation of the shaft of an
electrical alternator fitted in the device.
7

8. 8

9. WORKING
 The pushing power is converted into electricity
 The piezoelectric material is fixed at the plane.
 The spring is used to return the inclined step in same position by releasing
the load.
 The shaft of generator is connected to the piezoelectric material. DC is
generated.
9

10. MODEL OF FOOTSTEP POWER
GENERATOR
10

11. 11

12. SIDEWALKS 12

13. GYM WORKPLACE 13
Vibration caused from machine in the GYM.
At workplaces piezoelectric crystals are laid
in the chairs for storing energy.

14. SMART HIGHWAYS 14
Present time we are
using asphalt roads(tar
roads) on which
thousand of vehicles
runs.
When a vehicle passes
road deflects vertically
(vibrates)
These vibrations are
released as thermal
energy which is being
wasted.

15. SMART
HIGHWAYS
15
By incorporating
piezoelectric
generators in the
road we can convert
vibrations caused by
vehicles in electric
energy.
This is implemented
in ISRAEL.

16. COMPARISONS 16
We have taken the outer ring road of
Hyderabad to compare.
The over all budget of this road is 6700 Cr.
In this 8 lane road of 158 Km. is laid .
If a piezoelectric road is laid………
The budget becomes 6800 Cr. Which is
only1.5% increase in overall budget.

17. PROFIT 17
The amount invested
in this returns in just
4 years.
Average life of
piezoelectric road is
30 years, so income
generated in next 26
years is a profit.

18. ELECTRIC CAR 18
By using piezoelectric generators in car’s tyres,
below chairs etc. we can generate and store charge
and can use in various car applications.

19. ADVANTAGES 19
This is a green solution for power
generation.
The centralization of power is minimized.
Even the most untouched and remote areas
can be electrified.
Dependence of thermal electricity is
minimized which in turn save the nature.
Reduces environmental pollution.
Saves more money.

20. DISADVANTAGES 20
Maintenance of these is a bit difficult .
Constant inspection are to be made.
Can pick up stray voltages in connecting
wires.
Crystal is prone to crack if overstressed.
May get affected by long use at high
temperature.

21. REAL-WORLD INSTALLATIONS
 Simon Langton Grammar
School for Boys – UK
 Empire State Building -
US
 Panduit Corporation
World Headquarters – US
 Riverdale Country School
– US
21

22. 22
Constant load
(kg)
No of times load
applied and removed
Voltage generated
(volts)
40 1 5
40 2 10
40 3 15
40 4 20
40 5 25
40 6 30
40 7 35
Testing and results

23. CONCLUSION 23
Piezoelectricity is a revolutionary source for
“ GREEN ENERGY”
Convert the ambient vibration energy surrounding
them into the “ELECTRICAL ENERGY”
This is an excellent alternative to reach the
“ INCRISING DEMAND OF ELECTRICITY”
This technology is tested in “CALIFORNIA” and
“ISRAEL” and approved successfully.
We concluded that it should be implemented in
“INDIA” also to accelerate the development.

24. 24