Haptic technology

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haptic technology

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Haptic technology

  1. 1. A SEMINAR REPORT ON “ HAPTIC TECHNOLOGY ” SUBMITTED IN PARTIAL FULFILLMENT FOR THE DEGREE OF BACHELOR OF TECHNOLOGY IN “INFORMATION TECHNOLOGY” BY “ANJALI A. SHAH” IT-3 UNDER THE GUIDANCE OF PROF.PRAKASH KHELAGE
  2. 2. OUTLINE <ul><li>What is haptic technology? </li></ul><ul><li>Working. </li></ul><ul><li>Architecture. </li></ul><ul><li>Characteristic. </li></ul><ul><li>Application. </li></ul><ul><li>Advantages. </li></ul>
  3. 3. WHAT IS HAPTIC TECHNOLOGY? <ul><li>Haptic technology , or haptics, is a tactile feedback technology that takes advantage of a user’s sense of touch by applying forces, vibration and motions to the user.  </li></ul><ul><li>It has been described as “(doing) for the sense of touch what computer graphics does for vision”. </li></ul>
  4. 4. What haptic provides us? <ul><li>Improved Usability </li></ul><ul><li>Enhanced Realism </li></ul><ul><li>Restoration of Mechanical Feel </li></ul>
  5. 5. Haptic interaction loop with user and Virtual Environment <ul><li> Human hand haptic virtual </li></ul><ul><li>device environment </li></ul>
  6. 6. WORKING BASIC BLOCK DIAGRAM OF HAPTIC ENVIORMENT
  7. 7. <ul><li>The above diagram consist of :- </li></ul><ul><li>Simulation engine. </li></ul><ul><li>Visual, auditory, and haptic rendering algorithms </li></ul><ul><li>Transducers. </li></ul><ul><li>Rendering. </li></ul>
  8. 8. HAPTIC ARCHITECTURE <ul><li>. </li></ul>
  9. 9. <ul><li>The haptic rendering is divided into three main blocks :- </li></ul><ul><li>Collision-detection algorithm detects collision between objects and avatars in the virtual environment and yield information. </li></ul><ul><li>Force-response algorithms  computes the interaction between the virtual objects and avatars when a collision is detected. </li></ul><ul><li>Control algorithms   command the haptic device in such a way that minimizes the error between ideal and applicable forces. </li></ul>
  10. 10. DESIGNING FACTORS <ul><li>Criteria For Designing Haptic Control System. </li></ul><ul><li>Free space must feel free </li></ul><ul><li>Solid virtual objects must feel stiff </li></ul><ul><li>Virtual constraints must not be easily saturated. </li></ul>
  11. 11. Haptic Device Control System <ul><li>There are three control system to control haptic devices:- </li></ul><ul><li>Impedance control system -&quot;displacement in -force out&quot;. </li></ul><ul><li>Admittance control system-&quot;force in - displacement out&quot;. </li></ul><ul><li>Hybrid control system. </li></ul><ul><li>Adaptive control system. </li></ul><ul><li>Robust control system. </li></ul><ul><li>Optimal control system. </li></ul>
  12. 12. Several Guidelines For Designing Haptic And Tactile Feedback For Directed Movements:- <ul><li>Maintain stimulus-response compatibility. </li></ul><ul><li>In normal viewing conditions, extra-visual feedback may not improve targeting performance. </li></ul><ul><li>The effects of feedback in multiple-target environments are not well understood. </li></ul><ul><li>The effects of feedback in multiple-target environments are not well understood. </li></ul><ul><li>Buttons on tangible objects can interfere with positioning. </li></ul>
  13. 13. CHARACTERISTICS <ul><li>1) Types Of Information Received </li></ul><ul><li>a) Tactile information- information acquired through </li></ul><ul><li>sensors in the skin . </li></ul><ul><li> b) Kinesthetic information-information acquired through </li></ul><ul><li> the sensors in the joints. </li></ul><ul><li>2) Types Of Forces </li></ul><ul><li>a) Forces due to object geometry. </li></ul><ul><li>b) Forces due to object surface properties, such </li></ul><ul><li>as texture and friction. </li></ul>
  14. 14. 3) Types of Haptic devices: a) Devices that allow users to touch and manipulate 3-dimentional virtual object. b) Devices that allow users to &quot;feel&quot; texture of 2-dimension objects.
  15. 15. HAPTIC DEVICE <ul><li>To aid computer users who are blind or visually disabled or are tactile leaners. </li></ul><ul><li>It provides resistance to texture in computer images. </li></ul><ul><li>It provides single point,3D force-feedback to the user via stylus attached to a moveable arm </li></ul>1) 2)
  16. 16. 3) 4) <ul><li>Cyber glove can sense th position and movement of fingers and wrist. </li></ul><ul><li>It can be used to manipulate virtual objects. </li></ul><ul><li>It is worn over Cyber Glove. </li></ul><ul><li>Exerts palpable forces on the real hand, creating illusion of touching. </li></ul>
  17. 17. APPLICATION <ul><li>FOR THE VISUALLY IMPAIRED </li></ul><ul><li>GAMING APPLICATION </li></ul><ul><li>AUTOMOTIVE </li></ul><ul><li>VIRTUAL EDUCATION </li></ul>
  18. 18. ADVANTAGE :- <ul><li>Digital world can behave like the real world. </li></ul><ul><li>Working time is reduced. </li></ul><ul><li>Medical field simulators allow would be surgeons to practice digitally. </li></ul>
  19. 19. DISADVANTAGES <ul><li>The precision of touch requires a lot of advance design.  </li></ul><ul><li>Haptics applications require highly specialized. </li></ul><ul><li>hardware and considerable processing power and hence its complex. </li></ul><ul><li>Haptics projects rely on fixed installations of equipment and are not easily portable. </li></ul><ul><li>Debugging issues. </li></ul>
  20. 20. THANK YOU

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