Accelero-meter Based Gesture

Controlled robot

ProjectOverview

BYKuldeep Patani

B.Sc. IT(VI)

IntroductionYou have many types of robots selling in

markets, ones that’r controlled by remote, or your cellphone , or by direct wired connection. They limit their tasks to only perform those activities that are programmed to them. They lack the ability to sense some situation and react as per that and, moreover, their costs

Introduction…

are high even for low application activities. It is

thus, I decided to design a.

Introduction…robot that won’t need any type of remote

or any communication module whatsoever. It should be a self-activated robot, that’ll drive itself according to a position of the user (who stands in front of it). It does what the user desires to do with it. Even makes a copy of all movements of the user standing in front of it. The required hardware is easily available

System Overview• An Accelerometer sensor will show variation

in voltage as our hand will move around the 3 axes.

• It is connected to the PIC micro controller . • Accelerometer is ADC based, so it'll be

connected to analog port, that’ll detect the change in the voltage by comparing the reading with the reference value(base value).

System Overview…• After mapping the change in the

voltage, the PIC microcontroller will send the data wirelessly.

• At the receiver end this data will be processed and motor driver will operate the motors as required.

• Whilst at the transmitter end the LCD Display will be processed, thus displaying some important messages to the user.

The accelerometer module used in this project is ADXL335 ,which is an ADC based sensor. It is a small, thin & low power complete accelerometer with signal conditioned voltage outputs. The product measures acceleration with a min. full scale range of 3g. It can measure the static acceleration of

Components

Accelerometer

Accelerometer…

gravity in tilt sensing applications, as well as dynamic acceleration resulting from motion, shock or vibration.

For the wireless transmitter & receiver, we have cheap & best A434 module that works at 434MHz of frequency. It’s an RF module that provides the best data transfer for small projects, which automatically reduces your expense & increases projects methodology. The Transmitter & Receiver modules are

Components...

Wireless Link

Wireless Link…

interfaced to the rest of the components like PIC MCU or Motor Driver according to our ease.

A434 Tx A434 Rx

For safe & secure data transfer between transmitter & receiver, we interface our wireless module A434 with Encoder & decoder IC at transmitter & receiver respectively. We have HT12E/D as encoder & decoder that are capable of sending 4 bits at a time wirelessly. Thus, we can call our wireless communication as a 4 channel wireless communication.

Components...

Encoder/decoder...

Encoder/Decoder…

A 16x2 LCD is there for flashing important messages to the user and it also serves our purpose well in the testing time when we need to find our base values.

Components...

Lcd Display

Components...

Lcd Display...

This is a motor driver IC that is responsible for supplying adequate current to the motors employed in the circuit. 1 IC can feed 2 motors & it can be interfaced directly to the decoder at the receiver end.

Components...

L293D

This is an 8 bit PIC microcontroller having RISC architecture best suited for small applications & projects. It has 32 I/O pins that suit well for our use and various inbuilt properties like Timers, Interrupts, PWM, USART, I2C & SPI communication etc.

Components...

Pic 16f887

Block Diagram

(Wireless Transmission)

PIC 16F887 MCU

Accelerometer LCD Display

ICSP Programming

Encoder

A434 Tx

A434 Rx

Decoder

L293D

Motor 1

Motor 2

Block Diagram

Future Aspects

The advancement in surgical field, and it’s connect with robotics clearly oracles the future of gesture controlled robots. Surgeons of the future might use a system that recognizes hand gestures as commands to control a robotic scrub nurse or tell a computer to display medical images of the patient during an operation.

Future Aspects…

“Both the hand-gesture recognition, and robotic nurse innovations might help to reduce the length of surgeries and the potential for infection” said Juan Pablo Wachs, an assistant professor of industrial engineering at Purdue University.

Future Aspects…

This’s the beginning ; apart from surgical fields it has scope for providing security, for providing high interface in television sets & mobiles. These objects also extend their scope in providing support to disabled & elderly people enabling them to live their life the way they want.

Thank you !