BY S.PRISCILLA STEFFI

Till now online communication involved only two of our senses.

SENSE OF SIGHT SENSE OF HEARING

A new technology targets on sense of smell

WHAT IS DIGITAL SCENT TECHNOLOGY ? Digital Scent Technology intends to change the interactive entertainment experience.

Using Electronic-nose we can sense a smell and Digital scent technology it is possible to sense, transmit and receive smell through internet.

PHYSIOLOGICAL ASPECTS OF SMELL

Smell is most evocative of senses.

How does the nose work?

Odour.

Olfactory mucosa and Olfactory bulb.

Primary odours

WHAT IS AN ELECTRONIC NOSE ?

Electronic nose is a device which detects odour and analyze it.

MAIN COMPONENTSSensing system Pattern recognition system SUB COMPONENTS

Sample delivery system Detection system Computing system

ANALOGY BETWEEN THE ELECTRONIC NOSE AND BIOLOGICAL NOSE

BIOLOGICAL NOSE ELECTRONIC NOSE

Inhaling Pump

Mucus Filter

Olfactory Epithelium Sensors

Binding With Proteins Interaction

Cell Membrane Depolarized Signal

Nerve Impulses Circuitry & Neural Network

SENSORS USED IN ELECTRONIC NOSE

What is a sensor ?

Sensor quality

Binding with Proteins

TYPES OF SENSORS Polymer sensors MOS sensors MOSFET sensors Quartz sensors Acoustic sensors Optical fibre sensors

POLYMER SENSORS 16 different polymer films Fixed voltage Change in conductivity of the polymer Base line resistance Bacterial Vaginosis (Bv)

MOS SENSORS Semiconducting film Taughi and Figaro n-type and p-type semiconductors Thick and thin film material 200oC to 400oC Detect gas leakage, combustible and toxic gases

DATA ANALYSIS : PATTERN CLASSIFICATION

3-dimensional output matrix (Xij(t) ) Response matrix  R = X11 X12 .... X1m

X21 X22 .... X2m

. . . . . Xij . . . . Xn1 Xn2 .... Xnm

PRE-PROCESSING DATA ANALYSIS Baseline manipulation (Xij

odor - Xi0) / Xi

0

Compression of data Normalization

MULTIVARIATE DATA ANALYSIS

PARC engine can be classified into Parametric Non- parametric Supervised Non- supervised

VARIOUS ANALYSIS Linear discriminant analysis Principal component analysis Clustering analysis

LDA PCA

Z p =a1pX1j + a2pX2 j +...............+ aipXij +..............+ anpXnj

SupervisedLinear data reduction technique

CLUSTER ANALYSIS

unsupervised, non-parametric

data into multiple groups

K-clustering , Tree clustering

ARTIFICIAL NEURAL NETWORS Analyze complex and non-linear data Artificial neurons

Multi layer perceptron

E-nose detects the smell molecules Scent is indexed according to its chemical make up Scent spectrum Scent synthesizer Air cannon

WHAT IS DIGITAL SCENT COMMUNICATION?

CARTRIDGES USED IN SCENT SYNTHESIZERS

19 types of smell creating chemicals.

19 partitions in the container

Anode, cathode and electrolyte

Chemical are derived from bacteria or plants

SWEET SMELL OF SUCCESS Scent stream

Scent Registry

Broad array of tools

Trisenx allows users to not only download scents, but to print out flavors that can be tasted

It is a printer like desktop device

Savannah, GA, based company

Aromas are stored in a disposable cartridge.

This cartridge has 20 chambers, each holding a distinct scent. Thousands of smells can be created with a 20-chamber cartridge

SENX SCENT DEVICE (sensory enhanced net experience)

WHAT IS SENX SAMPLER?Effective diffusion of all available fragrances

Chemical compounds used in producing aroma aldehyde, esther,alcohol and ketones.

WHAT IS AN AIR CANNON?

Directs smell to user’s nose

Nose Tracker

Air clump launcher

Scent Generator

3 Prototypes

THIRD PROTYPE

A scent switching mechanism is provided

Sub chamber

Scent cartridge

SUMMARY

ELECTRONIC NOSE

SENSORS

DATA ANALYSIS

ISMELL PERSONAL SCENT SYNTHESIZERS AIR CANNON

BIBLIOGRAPHY

http://nanotech.sc.mahidol.ac.th/nano/E-Nose.pdf

http://www.toodoc.com/Digital-Scent-Technology-ppt.html

http://www.trisenx.com/now.html  http://en.wikipedia.org/wiki/Metal_oxide_semiconductor

http://www.vecc.gov.in/~sacet09/downloads/INVITED%20SPEAKER%20LECTURE/Nabarun.pdf http://www.mdpi.com/1424-8220/9/8/6058/pdf  

THANKYOU