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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
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SENSITIVE SKIN
OUTLINE
INTRODUCTIONSKIN MATERIALSDEVICESSIGNAL PROCESSINGADVANTAGESDISADVANTAGESAPPLICATIONCONCLUSION
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.
INTRODUCTION
Machines in unstructured environmentsSocietal needs and concerns
a) Health industry
b) Eco friendly
c) Difficulties of acceptance
SYSTEM COCEPT
FIG: Sketch of interconnects between sensors, intelligence and actuators
RESEARCH ISSUES
Skin MaterialsSensing DevicesSignal and Data ProcessingApplications
SKIN MATERIALS
Hold embedded sensorsFlexibleStretch, shrink and wrinkleNovel wire materials
Substrate / interconnect issues
1. Stretching and bending make the substrate thin or place interconnects at neutral
plane
MODELS
Three different models of substrate / interconnect system evolved:
1. Saran wrap model
2. Soccer ball model
3. Panty hose model
Adding Sensors To Substrate
1.Hybrid Approach
2.Integrated Approach
In here circuits are directly on the substrate .
This method avoids the high cost and reliability issues of hybrid assembly.
3. Distributed Intelligence Approach
A network of optical fiber are used to sense the properties
Devices For Sensitive Skin
1.Flexible or deformable2.Power storage3.Deployed 2-D array4.Smaller array5. Self sensing ability6.Measure distance to objects7.Studies in h/w architecture8.Unique properties
Large - Area Electronics1.Organic electronics and optoelectronics on
flexible substrates.
OTFT
2. Thin Film MEMS Thin film micro electromechanical (MEMS) devices on
plastic substrate demonstrate that mechanical sensors can be built on flexible substrate .
3. NanostructuresUltra large area ICs embedded into electrotextiles
Manufacturing Of Large Area Sensitive Skin
Printing techniques
1.Direct Printing
2.Laser Writing
3.Nanoimprinting
Direct Printing
Laser Writing
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
PrincipleA 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 ToleranceData ReductionData Processing
ADVANTAGES
Reversal of negative impacts of machinesReduction in weight and thicknessCan be rolledFIR AND IIR filters conserves the battery power.Friendly to environment
DISADVANTAGES
Skin be able to conform to arbitrary shapes.Able to flex, bend and stretchProperties 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 electronicsDisplays, printersStore and information Ranging from medicine and biology to machine
industry and defensespace 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.