The Actuated Workbench: ComputerControlled Actuation Tabletop Tangible Interfaces

1
The Actuated WorkbenchComputer-Controlled
ActuationTabletop Tangible Interfaces

• Gian Pangaro, Dan Maynes-Aminzade, Hiroshi Ishii
• MIT Media Lab

Presenter Shih-yen
2005/05/10
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Introduction

• Current interactive benchs output is displayed
  only through sound or graphical projection on and
  around the objects.
• The user must sometimes compensate for
  inconsistencies when links between the digital
  data and the physical objects are broken.

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Design Considerations

• quite small
• move multiple object at the same time.
• accommodate a variety of sensing areas.
• silent

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System Description

• Mechanical Details
• 16.5cm (88 grid)
• Custom-wound electromagnets (1.9cm3.8cm)

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System Description (cont.)

• Electronics Details
• In order to move (multiple) objects
• custom electronics to drive electromagnets
  bi-directional
• set the polarity/on off

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System Description (cont.)

• Movable objects
• 2.54cm2.54cm, IR LED, battery, pad, neodymium
  magnets (1.26cm1.26cm0.63cm)
• friction (acrylic)
• rotation
• multiple magnet)
• Larger puck

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System Description (cont.)

• Vision Tracking
• distortions by strong magnetic fields
• Intel PC Camera Pro USB CCD camera
• multiple object

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Motion Control and Interpolation

• Manhattan Motion
• Sweeping algorithm

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Motion Control and Interpolation

• Smooth Motion

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Anti-Aliasing Techniques

• we wish to render an analog signal (a force of a
  particular direction and magnitude) using a
  discrete array of cells (variable-duty
  electromagnets).
• Dot-based Anti-aliasing
• speed limit (15cm/s)
• Jet-based Anti-aliasing

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Applications

• Basic GUI
• search, retrieve, sort, history, undo, teaching,
  guiding
• Remote collaboration
• Simulation and Display for Interacting Objects.
• Entertainment

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Conclusions and Future Work

• Tiling of Actuation Surfaces and Scale
• Multiple tile
• Puck Modifications
• Fit better in the hand( multiple magnets/orient)
• Use with Electromagnetic Tracking Technologies
• New Types of Motion
• Flip, launch into air, levitate
• Coordinating Multiple Objects
• Prevent collision,
• Its not entirely passive.