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SEMINAR PRESENTATION ON

A FLEXIBLE AND STRETCHABLE TACTILE

SENSOR UTILIZING STATIC ELECTRICITY

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CONTENTS

Sensors

Tactile sensors

What are

FSTSSE?

Structure

Principle

Working of

FSTSSE

Characteristics

Experiments

Advantages

Disadvantages

Applications

Conclusion

References

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SENSORS responds to an input quantity by generating a

functionally related output usually in the form of

an electrical or optical signal. Diff types of sensors

>temperature

>pressure

>touch

>speed

>vehicle speed

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TACTILE SENSORS

sensitive to touch

many types

>resistive

>capacitive

>using SE

>using carbon nanotubes

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WHAT ARE FSTSSE?? Detects touch and

release

flexible and stretchable

utilizes the phenomenon of static electricity and ESI

used mainly in humanoid robots

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STRUCTURE OF FSTSSE

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Multi-element sensor with 6 square elements and 2 line elements

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PRINCIPLE

static electricity

>imbalance of electric charges within or on the surface of a material

>Thales of Miletos in 600 BC

electrostatic induction

>redistribution of electrical charge in an object, caused by the influence of nearby

charges.

>John Canton in 1753

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WORKING OF FSTSSE

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CHARACTERISTICS Sensor output for a touch

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EXPERIMENTS ON FSTSSE

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EXPERIMENTAL SETUP

sensor made of conductive silicon rubber non inverting amplifier Rs = Rf =10k ohm Ri = 10M ohm

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1)RESPONSE TO WEIGHT

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2) RESPONSE TO DIFF TOUCH VELOCITIES

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3)RESPONSE TO DIFF AREAS OF SENSOR ELEMENT

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4) RESPONSE TO DIFF MATERIALS OF TOUCHING OBJECT

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5) WHEN SENSOR IS STRETCHED

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Sensor output when sensor is stretched to triple its original length

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ADVANTAGES

Flexible Stretchable Soft Simple structure Can discriminate the touching objects Can detect the touching points

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DISADVANTAGES Cannot differentiate between a touch

and collision.

Depends on the condition of sensor

surface

Does not respond to weight

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APPLICATIONS Robotics Security systems Electronic gadgets Home appliances

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CONCLUSION

Flexibility ,stretchability and softness of

the tactile sensor are important features for

the humanoid robots.

Robotics is a field that needs to be

updated with inventions

Humans and robots working hand in hand

can make our world a better place to live

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A reliable human-robot alliance can make our works easier and much more

efficient.

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REFERENCES

A Flexible and Stretchable Tactile Sensor utilizing Static Electricity- Yasunori Tada, Masahiro Inoue, Toshimi Kawasaki,Yasushi Kawahito,

Hiroshi Ishiguro, and Katsuaki Suganuma. Wikipedia

Sensors, Focus on Tactile, Force and Stress Sensors-

ISBN 978-953-7619-31-2, pp. 444, December 2008

Tactile Sensing—From Humans to Humanoids-

Ravinder S. Dahiya

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