Accession Number : ADA302588

Title :   HAPTAC: A Haptic Tactile Display for the Presentation of Two-Dimensional Virtual or Remote Environments.

Descriptive Note : Interim rept. Jun 93-Mar 95,

Corporate Author : ARMSTRONG LAB WRIGHT-PATTERSON AFB OH CREW SYSTEMS DIRECTORATE

Personal Author(s) : Hasser, Christopher J.

PDF Url : ADA302588

Report Date : MAR 1995

Pagination or Media Count : 37

Abstract : This report describes the development of a tactile display device that allows the user to "see" (feel) a two-dimensional computer-generated surface with his or her fingertip. The user places a fingertip on a tactile feedback array composed of pins that rise through a touch plate. The feedback array, affixed to a position-sensing "mouse" on a digitizer pad, slides across the digitizer pad surface when pushed by the user. As the mouse indicates the changing position of the fingertip, pins in the array rise and fall to simulate a virtual surface underneath the user's fingertip. The pins of the tactile feedback arrays used for this device are driven by shape-memory alloy (SMA) wires that contract when heated by electric current. The low bandwidth of these actuators prevents the user from moving across the virtual surface more than a few centimeters per second, but next-generation actuators with higher bandwidths should improve upon this performance. Applications include tactile perception research, teleoperation, virtual reality, aids for the blind, etc.

Descriptors :   *DISPLAY SYSTEMS, *MAN MACHINE SYSTEMS, *TOUCH, *TELEOPERATORS, *FINGERS, TWO DIMENSIONAL, ARRAYS, SURFACES, FEEDBACK, USER NEEDS, COMPUTER APPLICATIONS, ACTUATORS, ELECTRIC CURRENT, MICE, BANDWIDTH, HEAT, PERCEPTION.

Subject Categories : Telemetry
      Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE