21-02-2010, 12:43 PM
SENSITIVE SKIN.ppt (Size: 782 KB / Downloads: 735)
SENSITIVE SKIN
INTRODUCTION
What is sensitive skin
It is a large area flexible array of sensors, with data processing capabilities, with the ability to sense the surroundings.
It make possible the use of unsupervised machine in our midst.
Machines in unstructured environments
Societal needs and concerns
a) Health industry
b) Eco friendly
c) Difficulties of acceptance
RESEARCH ISSUES
Skin Materials
Sensing Devices
Signal and Data Processing
Applications
SKIN MATERIALS
Hold embedded sensors
Flexible
Stretch, shrink and wrinkle
Novel wire materials
MODELS
Three different models of substrate / interconnect system evolved:
1. Saran wrap model
2. Soccer ball model
3. Panty hose model
Devices For Sensitive Skin
1.Flexible or deformable
2.Power storage
3.Deployed 2-D array
4.Smaller array
5. Self sensing ability
6.Measure distance to objects
7.Studies in h/w architecture
8.Unique properties
Large - Area Electronics
1.Organic electronics and optoelectronics on flexible substrates.
2. Thin Film MEMS
Thin film micro electromechanical (MEMS) devices on plastic substrate demonstrate that mechanical sensors can be built on flexible substrate .
3. Nanostructures
Ultra large area ICs embedded into electrotextiles
Manufacturing Of Large Area Sensitive Skin
Printing techniques
1.Direct Printing
2.Laser Writing
3.Nanoimprinting
LASER WRITING
Laser writing is combined with MAPLE process:
1.Electronic circuit patterns are formed
2.Move the receiving substrate 1 beam dia.
3.Assemble to get desired pattern
Nanoimprinting
Principle
A thickness is created which is transferred through resist layer via on O2 plasma based etching process.
Fig shows a nanoimprint lithography (NIL)
SIGNAL PROCESSING
Fault Tolerance
Data Reduction
Data Processing
ADVANTAGES
Reversal of negative impacts of machines
Reduction in weight and thickness
Can be rolled
FIR AND IIR filters conserves the battery power.
Friendly to environment
DISADVANTAGES
Skin be able to conform to arbitrary shapes.
Able to flex, bend and stretch
Properties of fusion vary when components fail or repaired.
APPLICATIONS
1.Human skin or Wearable skin
2.Sensitive skin for machines
3.Environmental sensitive skin
4.Actuated sensitive skin
FUTURE SCOPE
Develop new inexpensive consumer electronics
Displays, printers
Store and information
Ranging from medicine and biology to machine industry and defense
space exploration, mine detection
CONCLUSION
Sensitive skin will make it possible to have unsupervised machinery in unstructured, unpredictable surroundings. It will make the machine cautious and eco friendly. It is an enabling technology with far reaching application The state of art in the areas that are basic to the development of skin technology shows that highly efficient devices are feasible. All this non withstanding the fact that the existing prototypes are clumsy, have low resolution, accuracy and reliability, and are not yet ready for commercialization.