ABOUT THE GROUP
The group psycorob's is an initiative by second year students of sikkim manipal institute of techonology.This group actively involved in various technical projects to sort out issues related to every day struggle of a comman man.ou group open to new ideas so do your views regading the projects .
AMPHIBOUS BOT
Introduction
The idea to conceive a robot that would operate in any kind of terrain
came from its versatile nature. The robot in this report is manually controlled
via a dtmf controller. It is used to operate a robotic arm. The wheels enable
locomotion on land, while a ball system was designed for aquatic locomotion.
Mechanical structure of robot
The wheels are powered by servo geared motors.
It is in fact a four wheel drive. Four buoys placed on top of the wheels enable
locomotion in water. A fifth motor present at the back of the entire assembly
is used for changing directions in water. The robot is primarily designed to
pick items via the use of a robotic arm. The robot comes with an assortment of
grippers enabling it to pick up different items. The robot being dtmf
controlled makes its operation easy. The entire platform on which the robot is
assembled is made up of wood. Needless to say , the electronic components such
as the chipset have been waterproofed via a polythene covering.
Gripper action
It is in fact the
robotic arm that grants this electronic device its versatile nature .It is
powered by 2 dc servo geared motors and 2
stepper motors. The precise movement of the robotic arm called for a
motor that would give a precise rotation. This gave rise to the stepper motors.
Perhaps the biggest challenge the design faced was the power that this entire
assembly would consume. This will be further elucidated in the electronic
section of the robot.
Electronic components
As proposed, the
entire assembly would be powered by Atmel’s atmega 16 microcontroller .The
video feed will be transmitted by an onboard vga camera. This would enable the
operator to have a view of operations to be performed via the gripper. The
onboard analog to digital (ADC PIN) would be perfect for this. As the entire
assembly would need, 2 stepper and 6 servo geared motors the atmega 16 was the
perfect microcontroller. The wheels are connected in parallel for movement on
land.
Gripper action
The gripper needs
2 servo geared motors and 2 stepper motors. Thus in terms of power consumed the
gripper rivals the motors used for locomotion. Perhaps it consumes more power
due to the variable load that the gripper would be subjected to. The
microcontroller operates between 4.5 TO 12V.Perhaps the biggest challenge would
be to get proper voltage for the gripper action. The same quandary awaits the
motors used for motion of the entire assembly in question.
Control system of the assembly
The robot would be
dtmf controlled via a cellphone. The video feed so transmitted by the onboard
vga camera would be viewed on a laptop or a desktop .The dtmf would control the
gripper action ,the locomotion on land as well as on water .Although the versatile nature of the electronic design
would call upon the much famous gsm module to control the robot. But the
prototype as such would be operated upon via the dtmf controller.
Versatile nature
Although, the primary
purpose of the bot would be exploratory in nature it could be outfitted with
various sensors to provide it with additional functions. Such as , a thermal
sensor to transmit temperature to the onboard l.c.d . The uses of this are
numerous.
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