 The Potential beyond 20KHz

• Generation
• Flaw Detection
• Other Applications
Mechanical

Electrical

Tuning Fork

Piezoelectric

Galton Whistle

Magnetostriction

Gas Current
Generator

Holtzman’s
Ge...
• Few mm
• Up to 90kHz

• Damped Waves 
• Human 20 kHz
• dog 45 kHz
• Train dogs without disturbing
your neighbors 
• Gas Current Generator
• Higher power
• 60kHz

• Holtzman’s Generator
• 33 kHz
Quartz up to 50 MHz
Tourmaline up to 150 MHz

•
• Adv.
• Simple
• Low cost
• Large output
power

• Disadv. 
• Limitation in upper
frequency
• Frequency
dependent on
tem...
• Cheaper, non-destructive, reliable than other methods
• Work on principal of echolocation
• Demonstration
• A-Scan
• B-Scan
• C-Scan
What can’t Ultrasound do ?
• Cleaning
• Mixing & separating
• Cutting, welding, soldering
• Detecting, ranging, imaging
• ...
•
•
•
•
•

Agitate adhering contaminants, in holes and cracks too.
Solvent to dissolve and carry contaminants
less likely ...
• Bat, porpoises
• Submarines: Sonar
• Detecting Icebergs
• Detecting other submarines
• Finding the depth of sea

• Robot...
• Ultrasonic Flow Measurement
• Automatic Door
• Not only for animals !
• Modulated to communicate between submarines and
divers.
• Ultrasonic LAN
• Vibrate blade in ultrasonic range
• Amplitude ~ 10 – 70 microns
http://www.sonotec.com/en/tec.ht
• Smooth cut
ml
• Simple & Faster
• Ultrasound
• create turbulence
• Decrease air pressure

• Increase rate of evaporation
• Medical Ultrasonic imaging
• Pathological lesion detection
• Visualize fetus condition

• Veterinary treatments
• As Ani...
Can I do
liposuction
too

•
•
•
•
•
•

High-intensity focused ultrasound (HIFU)
Lithotripsy
Targeted ultrasound drug deliv...
•
•
•
•

Depolymerisation
Oxidation in aqueous environment
Catalysis
Emulsification- to preserve milk, better chocolates ...
• Ultrasonic mixing for
high performance
concrete
• Biodiesel production
• Under specific cond.
• Separation of mixture
• ...
•
•
•
•
•

The Mosquito or Mosquito alarm or sonic shield
Sonic bullets
Sonic Grenades
Sonic mines
Sonic Cannons
Ultrasonics
Ultrasonics
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Ultrasonics

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  • Low pass filter
  • Another process uses cavitation and abrasive fluid
  • Ultrasonics

    1. 1.  The Potential beyond 20KHz 
    2. 2. • Generation • Flaw Detection • Other Applications
    3. 3. Mechanical Electrical Tuning Fork Piezoelectric Galton Whistle Magnetostriction Gas Current Generator Holtzman’s Generator
    4. 4. • Few mm • Up to 90kHz • Damped Waves 
    5. 5. • Human 20 kHz • dog 45 kHz • Train dogs without disturbing your neighbors 
    6. 6. • Gas Current Generator • Higher power • 60kHz • Holtzman’s Generator • 33 kHz
    7. 7. Quartz up to 50 MHz Tourmaline up to 150 MHz •
    8. 8. • Adv. • Simple • Low cost • Large output power • Disadv.  • Limitation in upper frequency • Frequency dependent on temperature • Nickel
    9. 9. • Cheaper, non-destructive, reliable than other methods
    10. 10. • Work on principal of echolocation • Demonstration
    11. 11. • A-Scan • B-Scan • C-Scan
    12. 12. What can’t Ultrasound do ? • Cleaning • Mixing & separating • Cutting, welding, soldering • Detecting, ranging, imaging • Drying • Heating • Help in giving birth • Get massage & Treatments  I want an Ultrasonic Worker
    13. 13. • • • • • Agitate adhering contaminants, in holes and cracks too. Solvent to dissolve and carry contaminants less likely to cause damage wafer, medical implant, jewelry, lens industrial parts How ? Cavitation
    14. 14. • Bat, porpoises • Submarines: Sonar • Detecting Icebergs • Detecting other submarines • Finding the depth of sea • Robots Object detection
    15. 15. • Ultrasonic Flow Measurement • Automatic Door
    16. 16. • Not only for animals ! • Modulated to communicate between submarines and divers. • Ultrasonic LAN
    17. 17. • Vibrate blade in ultrasonic range • Amplitude ~ 10 – 70 microns http://www.sonotec.com/en/tec.ht • Smooth cut ml
    18. 18. • Simple & Faster • Ultrasound • create turbulence • Decrease air pressure • Increase rate of evaporation
    19. 19. • Medical Ultrasonic imaging • Pathological lesion detection • Visualize fetus condition • Veterinary treatments • As Animals can’t tell where the pain is.
    20. 20. Can I do liposuction too • • • • • • High-intensity focused ultrasound (HIFU) Lithotripsy Targeted ultrasound drug delivery (ATDD) Cancer therapy Ultrasound assisted thrombolysis ……. A very long list of Unfamiliar Jargons http://en.wikipedia.org/wiki/Therapeutic_ultrasound
    21. 21. • • • • Depolymerisation Oxidation in aqueous environment Catalysis Emulsification- to preserve milk, better chocolates  • How? Cavitation
    22. 22. • Ultrasonic mixing for high performance concrete • Biodiesel production • Under specific cond. • Separation of mixture • Due to differential pressure zones • Used to sort paper fibers for good quality papers
    23. 23. • • • • • The Mosquito or Mosquito alarm or sonic shield Sonic bullets Sonic Grenades Sonic mines Sonic Cannons

    ×