Haptic gloves controlled robotic arm using MEMS accelerometer

NOVATEUR PUBLICATIONS
INTERNATIONAL JOURNAL OF INNOVATIONS IN ENGINEERING RESEARCH AND TECHNOLOGY [IJIERT]
ISSN: 2394-3696
VOLUME 2, ISSUE 1 JAN-2015
1 | P a g e
Haptic gloves controlled robotic arm using MEMS accelerometer
Bhushan Rohankar,
Lecturer, Electronics and Telecommunication Dept/ GNIET/ Nagpur/Maharashtra, India
Juhily Chokhandre,
Undergraduate Electronics and Telecommunication Dept/ GNIET/ Nagpur/Maharashtra, India
Shruti Joshi
Shilpa Kharkate
Laxmi Dubay
Radhika Nimje
ABSTRACT
Robots of the current generation have been used in fields isolated from the human society. The definitions
of robotics are numerous and varied , ultimately they all deal with a labour-saving machine that with
increasing technological capabilities gets closer and closer to human mechanical and mental capabilities. In
order to represent the robotic technology in the field of human-machine interaction and wireless
communication for allows interactivity in real-time with virtual objects it is very necessary to develop
some or the other technology that makes the maximum use of robot to help people do their work in an
efficient way in their day to day life. The main objective of the project is to design and develop the Robot
that is used to move using wireless system by recognizing hand motion that is controlled by haptics
technology for virtual environment & human-machine systems capable of haptic interaction.
Keyword - Haptic, MEMS, accelerometer, robot, arm.
INTRODUCTION
The introduction section of this report illustrates the original industrial robot arm unimate from 1961-
which doesn’t look much like a human arm- compared with the 2012 Baxter which is basically a
combination of two robot arms on a central body processing centre with a humanoid faced on video display
for a head and the wheeled mobile base. The paper focuses on design and implements a robotic arm and
controlled it using a human arm by means of HAPTICS technology. A robot consists of sensors,
processors, actuators and power sources. Sensors are the marvel of the 21th century robotics ranging from
laser range finding to MEMS on a chip like gyroscopes, accelerometer. Haptics is the science of applying
touch sensation and controlled for interaction with virtual or physical applications.
HAPTICS is mainly classified in three areas
1. Human Haptics
2. Machine Haptics
3. Computer Haptics
On the other hand, Sensors on the haptic device work transducers which convert hand motions into
electrical signals. This hand movement can be replicated using robotic arm.
Our project is basically divided into two modules namely,
 Transmitter side (Haptics Glove)
 Receiver side (Robot Side)

ISSN: 2394-3696
2 | P a g e
TRANSMITTER
Fig 1: Circuit diagram of transmitter.
CIRCUIT WORKING
Haptic Sensors
A device that measures physical quantity and converts it into equivalent electrical signal. The user should
make hand movement, in order to move robot. The various movements is sensed by potentiometer and
accelerometer attached to haptic gloves. For position feedback there is a potentiometer which is used in
haptic suit along with ADC. Then it gives feedback in the form of voltage. The accelerometer is connected
to the other gloves for position feedback of hand movement either left or right. The output of the sensors
should be in analog form. Thus they are connected to analogue port of micro controller.
ATMEGA16 Microcontroller:

The ATmega16 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC
architecture. AVR is a modified Harvard architecture 8 bit RISC single chip microcontroller which was
developed by Atmel in 1996. AT mega 16 is high performance low power Atmel AVR 8bit microcontroller
with 8kb of in system self programmable memory. There are 131 powerful instructions present in
ATmega16.Most of single clock cycle execution and 32*8 general purpose working register, fully static
operation.
 High-performance, Low-power AVR 8-bit Microcontroller
 Advanced RISC Architecture
 131 Powerful Instructions – Most Single-clock Cycle Execution
 32 x 8 General Purpose Working Registers
 On-chip 2-cycle Multiplier
 Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes
 One 16-bit Timer/Counter with Separate Prescaler, Compare,
 Four PWM Channels
 8-channel, 10-bit ADC
 Byte-oriented Two-wire Serial Interface
 Power-on Reset and Programmable Brown-out Detection
 External and Internal Interrupt Sources

ISSN: 2394-3696
3 | P a g e
 I/O and Packages
 32 Programmable I/O Lines
 40-pin PDIP, 44-lead TQFP, and 44-pad MLF
 Operating Voltage is 4.5V-5.5V for ATmega16.

RF transceiver modules
The CC2500 is a very low cost true single chip 2.4GHz transceiver which is used to designed for very low
power wireless applications. So it acts as transmitter module. Its carrier freq. is 2.4GHz.Therefore data
received at Din pins of cc2500 from TXD (PD1) pins of microcontroller is modulated by ASK technique
for long distance wireless transmission. Without antenna transmitting range of the transmitter is 25 to 30m
(radius). For the transmission antenna should be connected over this distance. Hence this modulated data is
send via antenna to robotic arm (receiver). CC2500 RF Module is a transreceiver module which provides
easy to use RF communication at 2.4 Ghz. It can be used to transmit and receive data at 9600 baud rates
from any standard CMOS/TTL Source. This module is a direct line in replacement for your serial
communication it requires no Extra hardware and no extra coding toIt works in Half Duplex mode i.e. it
provides communication in both directions, but only one direction at same time.
Fig 2: Circuit diagram of receiver
RECEIVER
RF transceiver module-CC2500:
CC2500 acts as a receiver module. It demodulates the received data. This data is then send serially to
microcontroller pin on PD0 (RXD).
Voltage regulator (7805)
7805 is a voltage regulator integrated circuit. It is a member of 78xx series of fixed linear voltage regulator
ICs. The voltage source in a circuit may have fluctuations and would not give the fixed voltage output. The
voltage regulator IC maintains the output voltage at a constant value. The xx in 78xx indicates the fixed
output voltage it is designed to provide. 7805 provides +5V regulated power supply. Capacitors of suitable
values can be connected at input and output pins depending upon the respective voltage levels.
Motor Driver (L293D)

ISSN: 2394-3696
4 | P a g e
L293D is a dual H-bridge motor driver integrated circuit (IC). Motor drivers act as current amplifiers since
they take a low-current control signal and provide a higher-current signal. This higher current signal is used
to drive the motors.L293D contains two inbuilt H-bridge driver circuits. In its common mode of operation,
two DC motors can be driven simultaneously, both in forward and reverse direction. The motor operations
of two motors can be controlled by input logic at pins 2 & 7 and 10 & 15. Input logic 00 or 11 will stop the
corresponding motor. Logic 01 and 10 will rotate it in clockwise and anticlockwise directions, respectively.
Atmega 8 Microcontroller:
The Atmel AVR ATmega8 is a low-power CMOS 8-bit microcontroller based on the AVR RISC
architecture. By executing powerful instructions in a single clock cycle, the ATmega8 achieves
Throughputs approaching 1MIPS per MHz, allowing the system designer to optimize power consumption
versus processing speed.
Enable pins 1 and 9 (corresponding to the two motors) must be high for motors to start operating. When an
enable input is high, the associated driver gets enabled.
As a result, the outputs become active and work in phase with their inputs. Similarly, when the enable input
is low, that driver is disabled, and their outputs are off and in the high-impedance state.
Accelerometer Sensor
Accelerometers are sensors or transducers that measure acceleration. Accelerometers generally measure
acceleration forces applied to a body by being mounted directly onto a surface of the accelerated body.
Accelerometers are useful in detecting motion in objects. An accelerometer measures force exerted by a
body as a result of a change in the velocity of the body. A moving body possesses an inertia which tends to
resist change in velocity. It is this resistance to change in velocity that is the source of the force exerted by
the moving body. This force is directly proportional to the acceleration component in the direction of
movement when the moving body is accelerated. The motion is detected in a sensitive portion of the
accelerometer. This motion is indicative of motion in the larger object or application in which the
accelerometer is mounted. Thus, a sensitive accelerometer can quickly detect motion in the application.
ADVANTAGES
Advantages: -
 It allows interactivity in real-time with virtual objects
 Machines don't get tired. They don't close their eyes.
 Can be applied in remote rural areas so as to carry out operations.
 Can be used in military areas where highly skilled doctors may not be present.
 In application like bomb .disposal the human life is not at risk.
 It allows interactivity in real-time with virtual objects.
 Less cutting of skin due to use of advance technology camera and tools.
 Precise control of tools during operation.
 Reduction of no. of peoples needed in operation room.
 Be unaffected by anger, revenge, hunger, fear, fatigue, or stress.
References
[1] Xinxiang Tang, Hironao Yamada, Dongxiang Zhao, Tao Ni. .Haptic Interaction in Tele-operation
Control System of Construction Robot Based on Virtual Reality., IEEE, 2009.
[2] Nisha Sharma, Swati Uppal, Sorabh Gupta. .Technology Based On Touch: Haptics Technology.,IEEE,
2011.
[3] Patrick R¨oßler, Timothy,. A NOVEL HAPTIC INTERFACE FOR FREE LOCOMOTION IN
EXTENDED RANGE TELEPRESENCE SCENARIOS,Germany,IJERA-2008

ISSN: 2394-3696
5 | P a g e
[4] Rama Krishna, G. Sowmya Bala, A.S.C.S. Sastry, B. Bhanu Prakash Sarma, Gokul Sai Alla.Robotics
Arm control using sensors. International Journal of Engineering Research and Applications (IJERA) ISSN:
2248-9622 www.ijera.com, May-Jun 2012.
[5] Ken.ichiro NAGASAKA, Atsushi MIYAMOTO, .Motion Control of a Virtual Humanoid that can
Perform Real Physical Interactions with a Human., IEEE, 2008.
[6] Dzmitry Tsetserukou ,.Naoki Kawakami and Susumu- iSoRA: Humanoid Robot Arm for Intelligent
Haptic Interaction with theEnvironment. ASME Paper,2009

Haptic gloves controlled robotic arm using MEMS accelerometer

More Related Content

What's hot (20)

Similar to Haptic gloves controlled robotic arm using MEMS accelerometer (20)

More from ijiert bestjournal (20)

Recently uploaded (20)

Haptic gloves controlled robotic arm using MEMS accelerometer