Standing wave acoustic levitation on an annular plate

Kandemir, M.H.; Çalışkan, Mehmet

doi:10.1016/j.jsv.2016.06.043

Cited by 16 publications

(8 citation statements)

References 36 publications

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“…The reflection of incident waves Y i on a reflective surface does not cause a phase shift. If the incident wave arrives perpendicular to the surface, the superposition between the incident wave Y i and the reflected wave Y r causes a minimum to be formed at a distance of λ/4 from the surface as shown by Equations (6-8) [22,23].…”

Section: Resultsmentioning

confidence: 99%

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Automated Insertion of Objects Into an Acoustic Robotic Gripper

Rothlisberger

Schuck

Kulmer

et al. 2020

The 1st International Electronic Conference on Actuator Technology: Materials, Devices and Applications

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Acoustic levitation forces can be used to manipulate small objects and liquid without mechanical contact or contamination. To use acoustic levitation for contactless robotic grippers, automated insertion of objects into the acoustic pressure field is necessary. This work presents analytical models based on which concepts for the controlled insertion of objects are developed. Two prototypes of acoustic grippers are implemented and used to experimentally verify the lifting of objects into the acoustic field. Using standing acoustic waves and by dynamically adjusting the acoustic power, the lifting of high-density objects (>7 g/cm3) from acoustically transparent surfaces is demonstrated. Moreover, a combination of different acoustic traps is used to lift lower-density objects from acoustically reflective surfaces. The provided results open up new possibilities for the implementation of acoustic levitation in robotic grippers, which have the potential to be used in a variety of industrial applications.

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Section: Resultsmentioning

confidence: 99%

“…Using the reflection of sound waves on a surface, a standing wave can be formed between the transducers and the surface by focusing the acoustic pressure on the surface. The distance between the oscillating elements of the transducers and the reflecting surface should be a multiple of λ/2 to achieve a high resulting pressure [22,23].…”

Section: Methodsmentioning

confidence: 99%

Automated Insertion of Objects Into an Acoustic Robotic Gripper

Rothlisberger

Schuck

Kulmer

et al. 2020

The 1st International Electronic Conference on Actuator Technology: Materials, Devices and Applications

View full text Add to dashboard Cite

show abstract

“…Using the reflection of sound waves at a surface, a standing wave can be formed between the transducers and the surface by focusing the acoustic pressure on the surface. The distance between the oscillating elements of the transducers and the reflecting surface should be a multiple of λ/2 to achieve a high pressure magnitude [39,40].…”

Section: Acoustic Trapsmentioning

confidence: 99%

“…The reflection of a wave at a surface does not cause a phase shift. If the incident wave arrives perpendicular to the surface, the superposition between the incident wave p i and the reflected wave p r causes a pressure minimum to be formed at a distance of λ/4 from the surface, as outlined by Equations ( 6)-( 8) [39,40].…”

Section: Acoustically Reflective Surfacementioning

confidence: 99%

Contactless Picking of Objects Using an Acoustic Gripper

et al. 2021

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Acoustic levitation forces can be used to manipulate small objects and liquids without mechanical contact or contamination. This work presents analytical models based on which concepts for the controlled insertion of objects into the acoustic field are developed. This is essential for the use of acoustic levitators as contactless robotic grippers. Three prototypes of such grippers are implemented and used to experimentally verify the lifting of objects into an acoustic pressure field. Lifting of high-density objects (ρ > 7 g/cm3) from acoustically transparent surfaces is demonstrated using a double-sided acoustic gripper that generates standing acoustic waves with dynamically adjustable acoustic power. A combination of multiple acoustic traps is used to lift lower density objects (ρ≤0.25g/cm3) from acoustically reflective surfaces using a single-sided arrangement. Furthermore, a method that uses standing acoustic waves and thin reflectors to lift medium-density objects (ρ≤1g/cm3) from acoustically reflective surfaces is presented. The provided results open up new possibilities for using acoustic levitation in robotic grippers, which has the potential to be applied in a variety of industrial use cases.

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“…[5,6] Acoustic levitation has been achieved using the flexural or bending mode vibrations of an annular plate at 20 kHz. [7] Polystyrene balls of several millimeters in diameter have been levitated successfully. Levitation of the highest density solid material (iridium, 𝜌 = 22.6 g/cm 3 ), as well as the highest density liquid material (mercury, 𝜌 = 13.6 g/cm 3 ), has been achieved using ultrasonic sound waves.…”

Section: (Received 16 November 2018)mentioning

confidence: 99%