Dr.V.Pushparajesh[1],Prof.S.Chandrasekar[2] ,S.Brindha[3], D.Ilavarasan[4], C.Kavin[5]. [1] ,[2]Associate Professor, Assistant

Dr.V.Pushparajesh1,Prof.S.Chandrasekar2 ,S.Brindha3,
D.Ilavarasan4, C.Kavin5.

               1 ,2Associate Professor, Assistant Professor ,Department
of Electrical and Electronics Engineering, Kongu Engineering College.

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              3,4,5 final
year Students of Department of Electrical and Electronics Engineering, Kongu
Engineering College.

 

ABSTRACT

The objective of
the project is to reduce human effort in 8construction sites. It is an arm
which provides support to the skeleton externally. It is designed like a suit
which is wearable over shoulders. Thus it is independent of the physique of the
person operating it. It is made portable and is wearable on shoulders. The
existing systems involve hydraulic and pneumatic systems and can lift only up
to 35 kg. It proves to be an effective alternative to the traditional weight
lifting approaches.  The stroke length of
the actuator determines the weight up to which the weight can be lifted up. The
push and pull force is given by the upward and downward movement of the stroke
of the actuator. It has high precision in handling weights. Thus it is also
physique independent which could be used in two ways for lifting: comparatively
lighter loads on the robotic arm and heavier ones with the access of trolley so
that the weight will never rest on the shoulders and will be delivered only to
the body of the system and use man only for the mobility of the weight from the
one place to the another. Here we use electrical equipments and so its
efficiency is increased. It is also economical. It does not require any
technical skills for operation. It has a vast scope in construction sites. It
also reduces the manpower. Its limitation is that it may affect the daily wages
of construction workers.

            I.INTRODUCTION

The project is to provide
physical support to the construction workers for heavy weight lifting. Its
objective is to prevent various occupational hazards .It is an artificial arm
less weight suit wearable over shoulders. The components involved in this
innovative model are actuators, steel support materials, battery, switches. The
push and pull force exerted by the actuator is utilized effectively. Thus the
optimization of its force is used in weight lifting .Also the aggregate of load
it could lift depends on the push and pull load efficiency of the actuator .The
device has two control sticks, which facilitates the change of required
function manually from one to another in few seconds of duration. Manual
control is provided by switches and it can also be automated by use of ardunio.
The total weight of the device is only 4kgs which is comparatively very less in
weight compared to the existing systems.

1 The less weight metal
aluminum which is reliable is used. It also lifts heavy weight up to 100kgs and
more depending upon the push and pull force of the actuator. The stroke length
of the actuator determines the weight up to which the weight can be lifted up.
Thus it is also physique independent which could be used in two ways for
lifting: comparatively lighter loads on the robotic arm and heavier ones with
the access of trolley so that the weight will never rest on the shoulders and
will be delivered only to the body of the system and use man only for the
mobility of the weight from the one place to the another. The whole weight of
the system actually rests on the shoulder. Support can be provided by fitting a
trolley to enable easy moving and weight lifting.

                                                                          

II.LITERATURE REVIEW

A. ARM
FOR WEIGHT LIFTING

            The idea of external supporting
systems for differently abled people gave the idea of providing support to the
arms of construction workers to enable them to lift weight without much
difficulty and also to improve the efficiency by implementing a jacket like
system for their convenience.

 

III.EXISTING
SYSTEM

A.
WOODEN WEIGHT LIFTING SYSTEM

 

            The objective of the project is to
overcome the drawbacks of the existing systems .The prevailing systems is not
applicable for the commercial applications. The 9pneumatic and hydraulic
systems are used in these systems and are applicable only for military
purposes. And till now no such contrivances have been brought to apply this
idea with effective efficiency. And the one which has been invented for
commercial usage is not reliable because it is made of wooden sticks and so the
amount of weight it could lift also gets restricted.

 

 

                                 Fig.1Existing
System

The
figure.1 depicts the existing weight lifting system. The existing systems involving
the pneumatic and hydraulic systems which are described above have no
commercial applications and cannot be used by constructional workers as they
require some technical operating skills.

 

IV.PROPOSED
SYSTEM

A.
Objective of proposed system

The main objective of this project is to develop a system
which would reduce the physical support given by the construction workers while
lifting weights. It can also be implemented for 10assembly lines that involve
heavy machineries.

 

B. Block
diagram

 

 

 

 

      

 

                

 

                             

 

                                    Fig.2 Block
diagram

The
figure.2 shows the weight lifting robotic arm for construction workers operated
using the power supply.The power supply is provided using the battery  to make the system portable.

V.
MECHANICAL CONSTRUCTION

 

            The mechanical design is made
using the metal frames which are made up of steel. The whole system is provided
only with the steel to provide the mechanical strength. The capability of the
steel to withstand the weight is also a deciding factor in tha amount of weight
to be lifted.2 The effort force to be experienced by the lever is calculated
using the  formula,effort force is given
by,F=(F1*D1)/D. Here,

F=lever
effort force,F1=load force,D1=distance from load force to fulcrum,D=distance
from effort force to fulcrum. Thus for a load force of 980N,distance from load
force to fulcrum of 400mm,distance from effort force to fulcrum  of 70mm,the calculated effort force will be
5600N. It indicates that the metal frames supports upto the effort force of
5600N.The mechanical construction is shown below:

 

Fig.3 Mechanical
parts

 

VI.ELECTRICAL
CONSTRUCTION

 

            The
electrical design consists of 5actuator and battery. In this proposed idea
linear actuator is used which provides linear movement in upward and downward
direction. The power supply to the whole system is provided by3 battery which
is rechargeable. The power supply unit must be designed in such a way that it
provides supply to the load without any interruption.4Battery working hour
calculation is done to find its operating hours. The specification of the
battery is 12v,7.5Ah,4.1A.The estimated hours6 is the ratio of the battery
capcity in mAh to the  product of device
consumption in mA.Thus for the given specifications the working hours will be
1.2 hrs.

 

Fig.4 Electrical part

 

VII.HARDWARE
IMPLEMENTATION

 

            The
hardware implementation of the proposed system is as shown as CADD model:

                

                 Fig.5
Hardware implementation

The
weight is lifted when the battery powers the actuator is stroke moves down thus
lifting the weight placed over it.

 

VIII.RESULT AND CONCLUSION

         

The
system is used to provide support to the arms of the workers and also to
increase the efficiency by improving the amount of weight lifted. It not only
helps in construction sites it may also used in automobile assembly lines.  Based on the survey taken by us, men with
physical strength were comfortable in working with our system and women found
it difficult to adapt with it. However, they found it convenient in working

             

           IX.FUTURE SCOPE

            This
prototype model can be expanded in future in many ways to serve many purposes
like, expanding it in industrial plants, the cost of the power supply system
can be reduced by using7 solar energy as a source and thus we can make it eco
friendly system.

REFERENCES

Degarmo, E. Paul; Black, J T.; Kohser, Ronald A.
(2003). Materials and Processes in Manufacturing (9th ed.).
Wiley. ISBN 0-471-65653-4.

2.     
https://www.easycalculation.com/physics/classical-physics/effort-force-calculator.php.

3.     
 Electric
Battery History – Invention of the Electric Battery. The Great Idea Finder. Retrieved 11
August 2008.

4.      https://www.digikey.in/en/resources/…calculators/conversion-calculator-battery-life

 “Electric & Pneumatic
Actuators”. www.baelzna.com.
https://www.digikey.in/en/resources/conversion…/conversion-calculator-battery-life.
 “Energy Sources: Solar”. Department
of Energy. Retrived 19 April 2011.
www.mlit.go.jp Overview of Construction Work Permits.

9.      www.hydraulicspneumatics.com/other…/chapter-5-pneumatic-and-hydraulic-systems.

10.  Musson & Robinson (1969). Science and Technology in the Industrial Revolution. Toronto:
University of Toronto Press

 

 

 

 

 

 

 

 

 

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