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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
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