1. G.H.RAISONI COLLEGE OF ENGINEERING
(AN AUTONOMOUS INSTITUTION UNDER UGC ACT 1956)
A REVIEW ON
“Energy Harvesting From Piezoelectric Material”
[A part of nanotechnology]
TEACHER ASSESSMENT EXAM-4
NAME : YASH SAWARKAR (82)
: KUNAL KAWALE (83)
SECTION:A
BRANCH: INFORMATION TECHNOLOGY

2. INDEX
1. Abstract……………………………………………………………….1
2. Introduction ………………………………………………………..1
3. Methodology under vibration load………………………2
4. Technique ……………………………………………………………3
5. Conclusion…………………………………………………………..4

3. 1.ABSTRACT
In the last few years, there has been an increasing demand for low-power and portable-energy
sources due to the development and mass consumption of portable electronic devices.
Furthermore, the portable-energy sources must be associated with environmental issues and
imposed regulations. These demands support research in the areas of portable-energy
generation methods. In this scope, piezoelectric materials become a strong candidate for
energy generation and storage in future applications. In this report we will discuss the energy
generation using nano technology by means of piezoelectric material An electrostatic
generator was also included in order to increase energy harvesting. In this energy harvesting
system, the mechanical energy is converted to the electric energy through the piezoelectric
effect of the polyurea film on the device
2.INTRODUCTION
The electric power generation using the piezoelectric element is one of the techniques
utilizing the piezoelectric effect. The wasted energy in the natural phenomenon, e.g., wind
and tidal energy, and the generated vibration on the structure such as a bridge, can be
reutilized by this energy harvesting technique. Several groups have been investigating the
energy harvesting techniques using the piezoelectric material PZT ceramics are suitable for
the energy harvesting system since the conversion efficiency from the mechanical to the
electrical energy is governed by the piezoelectric constants d and g and the PZT ceramics
have high piezoelectric constants and quality factor In this report we propose the energy
harvesting device with a polyurea thin film. Polyurea is one of the piezoelectric polymer
materials, which is expected as lead-free piezoelectric material and has rich flexibility and
high impact resistance. The polyurea thin film can be formed through the vapor deposition
polymerization with MDI and ODA. Unlike polyvinylidene fluoride (PVDF) film which
needs the stretching in the wet process, the polyurea film can be formed in the dry process
and the multi-layered and thin film can be currently formed, and the piezoelectric g constant
of the polyurea is larger than that of the PVDF

4. 3.METHODOLOGY UNDER VIBRATION LOAD
shows a schematic of the power-generationexperiment under a vibration load. This
experimental device consists of a connection device that transforms the vibration load of the
vibration table and a device that holds the laminated PZT test pieces in place. The vibration
load of the vibration table is transmitted to the laminate PZT
In the device holding the PZT elements, the compressionload to the initial compression
adjustment device is applied from the left, and is given as an initial compressive load to the
laminated PZT test piece sandwiched between the adapters through the rubber block. The
purpose of the initial compression load is to ensure that the load acting on the laminated PZT
elements maintains a compressive load at all times. The load acting on the PZT elements is
measured by a load cell.

5. 4. TECHNIQUE
Conversion of Vibration in Shoes Wearing into Electricity
Piezoelectric materials are materials (usually in the form of rock crystal, ceramics ,including
bone and polymers) that have the ability to generate an electric potential inresponse to
mechanical stress given into material. The mechanism process of energy generation in the
piezoelectric material is when there is pressure / mechanical energy of the piezoelectric
material, it causes deformation / mechanical shift, then it causes a shift in the charge /
dipoles. When the pressure / mechanical energy is removed, the charge will return to normal.
The process of pressure granting and removing on the piezoelectric material are repeated /
periodic charge will cause a shift causing alternating electric current. Electrical energy
generation scheme on the piezoelectric material can be seen in figure above.
Mechanical electrical energy generation piezoelectric materials (Peter Woas, 2012)
Generating electricity by using piezoelectric materials has three main stages:
1. Piezoelectric sensors as electrical energy generation module, which performs the conversion of vibrational
energy into electrical energy
2. Rectifier Module as part of the conversion to electrical energy into DC power supply
3. Functioning amplifier module comprising a voltage amplifier and voltage regulator. Output voltage generated
can be used as a source of electrical energy or can be stored in the battery

6. 5.CONCLUSION
From the several methods available to integrate energygenerating elements harvesting human
energy, piezoelectric materials associated with electrostatic generators seem to be one of the
most promising elements. In particular, electroactive polymers are particularly interesting due
to their low cost, flexibility, and easy integration into elements such as clothes and shoes. In
this paper, electroactive polymers based on β-PVDF