Three-Dimensional Mid-Air Acoustic Manipulation by Ultrasonic Phased Arrays

Ochiai, Yoichi; Hoshi, Takayuki; Rekimoto, Jun

doi:10.1371/journal.pone.0097590

Cited by 124 publications

(101 citation statements)

References 7 publications

(9 reference statements)

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“…This method has been used before in HCI for creating mid-air crosses [35], floating particle displays [54], paths [36], charts [37] or to manipulate tiny particles with wearables [30]. Those systems typically require more powerful and cumbersome sound emitters [3,15], like Langevin horns [2].…”

Section: Acoustic Levitationmentioning

confidence: 99%

TastyFloats

Thanh

Marzo

Ablart

et al. 2017

Proceedings of the 2017 ACM International Conference on Interactive Surfaces and Spaces

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We present two realizations of TastyFloats, a novel system that uses acoustic levitation to deliver food morsels to the users' tongue. To explore TastyFloats' associated design framework, we first address the technical challenges to successfully levitate and deliver different types of foods on the tongue. We then conduct a user study, assessing the effect of acoustic levitation on users' taste perception, comparing three basic taste stimuli (i.e., sweet, bitter and umami) and three volume sizes of droplets (5µL, 10µL and 20µL). Our results show that users perceive sweet and umami easily, even in minimal quantities, whereas bitter is the least detectable taste, despite its typical association with an unpleasant taste experience. Our results are a first step towards the creation of new culinary experiences and innovative gustatory interfaces.

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Section: Acoustic Levitationmentioning

confidence: 99%

TastyFloats

Thanh

Marzo

Ablart

et al. 2017

Proceedings of the 2017 ACM International Conference on Interactive Surfaces and Spaces

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“…Compared to other three groups of variable stiffness methods, structurebased method usually has sophisticated mechanism designs which may complicate the fabrication and control of these [56]. b 3D manipulation of particles with four transducer arrays [58]. c Proposal for acoustic-based variable stiffness method by altering the state of a particle system wrapped in membrane with acoustic manipulation.…”

Section: Discussionmentioning

confidence: 99%

“…5a) [56]. Based upon the basic principle, researchers have realized 2D and 3D manipulation of levitated objects with transducer arrays [54,57,58]. Snapshots of particles' levitation and manipulation with four transducer arrays are shown in Fig.…”

Section: Acoustic Levitation-/manipulation-based Stiffness Tuningmentioning

confidence: 99%

Principles and methods for stiffness modulation in soft robot design and development

2018

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Compared to traditional rigid robots, soft robots, primarily made of deformable, or less rigid materials, have good adaptability, conformability and safety in interacting with the environment. Although soft robots have shown great potentials for extended applications and possibilities that are impossible or difficult for rigid body robots, it is of great importance for them to have the capability of controllable stiffness modulation. Stiffness modulation allows soft robots to have reversible change between the compliant, or flexible state and the rigid state. In this paper, we summarize existing principles and methods for stiffness modulation in soft robotic development and divide them into four groups based on their working principles. Acoustic-based methods have been proposed as the potential fifth group in stiffness modulation of soft robots. Initial design proposals based on the proposed acoustic method are presented, and challenges in further development are highlighted.

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“…Acoustophoretic transport [Foresti et al 2013] and lapillus bug [Kono et al 2013] move the object along a 2D plane with a transducer array and a reflector plate. Extended acoustic manipulation [Ochiai et al 2014] moves objects in a 3D space with opposite transducer arrays, but no application of this method has been suggested.…”

Section: Acoustic Manipulationmentioning

confidence: 99%

“…Acoustic manipulation has been extended to 3D manipulation [Ochiai et al 2014]. In this study, we create an acoustic-potential field (APF) by using and extending this technology.…”

Section: Introductionmentioning

confidence: 99%

Pixie dust

2014

Self Cite

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Figure 1: Application images of Pixie Dust, levitated and manipulated objects in graphic metaphors. (a) Floating screen with projection. (b-c) Whale (hung by string) with particles and projected spout. (d) Physical vector graphics (showing "heart"). (e) Physical raster graphics. AbstractWe propose a novel graphics system based on the expansion of 3D acoustic-manipulation technology. In conventional research on acoustic levitation, small objects are trapped in the acoustic beams of standing waves. We expand this method by changing the distribution of the acoustic-potential field (APF). Using this technique, we can generate the graphics using levitated small objects. Our approach makes available many expressions, such as the expression by materials and non-digital appearance. These kinds of expressions are used in many applications, and we aim to combine them with digital controllability. In the current system, multiple particles are levitated together at 4.25-mm intervals. The spatial resolution of the position is 0.5 mm. Particles move at up to 72 cm/s. The allowable density of the material can be up to 7 g/cm 3 . For this study, we use three options of APF: 2D grid, high-speed movement, and combination with motion capture. These are used to realize floating screen or mid-air raster graphics, mid-air vector graphics, and interaction with levitated objects. This paper reports the details of the acoustic-potential field generator on the design, control, performance evaluation, and exploration of the application space. To discuss the various noncontact manipulation technologies in a unified manner, we introduce a concept called "computational potential field" (CPF).

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Three-Dimensional Mid-Air Acoustic Manipulation by Ultrasonic Phased Arrays

Cited by 124 publications

References 7 publications

TastyFloats

TastyFloats

Principles and methods for stiffness modulation in soft robot design and development

Pixie dust

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