Thursday, 11 December 2014

3D virtual models with haptic feedback could be good for teaching skills

"Computer scientists from the University of Bristol have devised a machine that generates floating 3D shapes that you can feel, but can’t see."

This type of technology could be a great addition to teaching simulations making the experience more realistic for physical examination or surgical skills.

"We present a method for creating three-dimensional haptic shapes in mid-air using focused ultrasound. This approach applies the principles of acoustic radiation force, whereby the non-linear effects of sound produce forces on the skin which are strong enough to generate tactile sensations. This mid-air haptic feedback eliminates the need for any attachment of actuators or contact with physical devices. The user perceives a discernible haptic shape when the corresponding acoustic interference pattern is generated above a precisely controlled two-dimensional phased array of ultrasound transducers. In this paper, we outline our algorithm for controlling the volumetric distribution of the acoustic radiation force field in the form of a three-dimensional shape. We demonstrate how we create this acoustic radiation force field and how we interact with it. We then describe our implementation of the system and provide evidence from both visual and technical evaluations of its ability to render different shapes. We conclude with a subjective user evaluation to examine users' performance for different shapes."

Long B, Seah SA, Carter T, Subramanian S. Rendering Volumetric Haptic Shapes in Mid-air Using Ultrasound. ACM Trans Graph. 2014 Nov;33(6):181:1–181:10. (Author copy also available)

1 comment:

  1. This is a nifty augmented reality app to help elementary level students learn through visual imaging. With this app, students get to interact and become a part of a story.

    Augmented Reality