ROBOTIC HAND

CONTROLLED BY HAND

GESTURE

ABSTRACT• Robotic hand controlled by hand

gesture Robot is a robot which can be controlled by simple gesture.

• The sensor will record the movement of hand in a specific direction which will result in the movement of the robot in the respective direction.

• The wired connection enables the user the interact with the robot in a more friendly way.

• Part 1: Introduction to our Project • Part 2: Introduction to Implementation Tools

• Part 3 Results and Conclusions

• Part 4: Possible uses

WORK BREAKDOWN STRUCTURE

Our “Microcontroller based robotic hand controlled by hand gesture” robot work on the principle of flex sensor which records hand movement and the information is then transferred to a encoder, which makes it ready for transmit on the receiving end, the information is received via wired connection decoded & then passed on to the Arduino. Microcontroller which takes various decisions based on the received information. These decisions are passed to the motor drive which triggers the motor in different configuration to make the robot move in a specific direction.

INTRODUCTION

The following Block diagram helps to understand the working of the Robot.

INTRODUCTION

• Part 1 : Introduction to our Project

• Part 2: Introduction to Implementation Tools• Part 3 Results and Conclusions

• Part 4: Possible uses

WORK BREAKDOWN STRUCTURE

ARDUINO

The Arduino is a microcontroller board based on the ATmega328.

Arduino is a open source electronics prototyping platform based on flexible, easy to use hardware and software.

The Arduino can sense the environment by receiving input from a verity of sensor and can effect its surroundings by controlling motors and other actuators.

ARDUINO

The Arduino can be powered via the USB connection or

with an external power source is selected automatically. The operating voltage is 5V.

It has 14 Digital I/O pins 6 of them providing PWM outputs.

It has 6 Analogue input pins.

ARDUINO

The Atmega328 has 32 KB (with 0.5 KB used for boot loader).

It also has 2 KB of SRAM and 1 KB of EEPROM.

The Atmega328 provides UART TTL (5V) serial communication, which is available on digital pins 0 (RX) and 1 (TX).

The Arduino can be programmed with the Arduino software ( download).

ARDUINO

FLEX

SENSO

R

SEW THE GLOVE

FLEX SENSOR

Flex sensors are sensors that change in resistance on the amount of bend on the sensor.

They convert the change in bend to the electrical resistance, the more the bend , the more the resistance value.

Inside the flex sensor are carbon resistive material elements within the thin flexible substrate.

More carbon means less resistance.

They are usually in the form of 1 to 5 inches long that vary in resistance from approx.: 10KΩ to 50KΩ.

They are used in gloves to sense the finger movements.

A 22kΩ resistor is also placed in series with each flex sensor in order to protect it.

Flex sensors are used to convert the flexing motion of the fingers into rotational motion of the servo motors.

FLEX SENSOR

SERVO MOTOR

Servo Motors are DC Motors to provide a precise angular motion.

The servo motors has three wires, one is for power, one is for ground, and one is for a control input.

The Servo motors are used in robotic arms and legs, sensor scanners and in RC toys like RC helicopter, airplanes and cars.

SERVO MOTOR

SERVO MOTOR

Power Supply for Servo MotorsThe servo requires a DC supply of 4.8 V to 6 V. The DC supply can be given through a battery or a regulator.

Selection of Servo Motors

The typical specifications of servo motors are torque, speed.

WORKING OF SERVO MOTOR Servos are constructed from three basic pieces; a motor, a

potentiometer (variable resister) and a control board.

The potentiometer is fed into the servo control circuit and when the control circuit detects that the position is correct, it stops the motor.

If the control circuit detects that the angle is not correct, it will turn the motor the correct direction until the angle is correct.

Normally a servo is used to control an angular motion between 0 and 180 degrees.

SERVO MOTOR

• Part 1 : Introduction to our Project

• Part 2: Introduction to Implementation Tools

• Part 3 Results and Conclusions• Part 4: Possible uses

WORK BREAKDOWN STRUCTURE

CONCLUSION

CERTANITY

The over all system perform responsibly well.

The robotic hand is capable to carry normal routine function as human hand does.

The microcontroller accepts inputs from the sensor and generates the proper control signals based on those inputs.

UNCERTANITY The lift capacity of the servo motors on the robotic hand

is limited.

The usable lifetime of the flex sensors seems to be limited.

The sensors themselves are very fragile and easily wear out from overuse.

Careful maintenance and protection of the flex sensors is crucial to successful operation of the system.

CONCLUSION

• Part 1 : Introduction to our Project

• Part 2: Introduction to Implementation Tools

• Part 3 Results and Conclusions

• Part 4: Possible uses

WORK BREAKDOWN STRUCTURE

POSSIBLE USES• Gaming (Virtual Motion)

• Handicapped persons

POSSIBLE USES

• Musical instrument.

POSSIBLE USES

THE END