Haptic technology

About: Haptic technology is a research topic. Over the lifetime, 18818 publications have been published within this topic receiving 306713 citations. The topic is also known as: haptics & haptic media.

Fingertip Tactile Devices for Virtual Object Manipulation and Exploration

Abstract: One of the main barriers to immersivity during object manipulation in virtual reality is the lack of realistic haptic feedback. Our goal is to convey compelling interactions with virtual objects, such as grasping, squeezing, pressing, lifting, and stroking, without requiring a bulky, world-grounded kinesthetic feedback device (traditional haptics) or the use of predetermined passive objects (haptic retargeting). To achieve this, we use a pair of finger-mounted haptic feedback devices that deform the skin on the fingertips to convey cutaneous force information from object manipulation. We show that users can perceive differences in virtual object weight and that they apply increasing grasp forces when lifting virtual objects as rendered mass is increased. Moreover, we show how naive users perceive changes of a virtual object's physical properties when we use skin deformation to render objects with varying mass, friction, and stiffness. These studies demonstrate that fingertip skin deformation devices can provide a compelling haptic experience appropriate for virtual reality scenarios involving object manipulation.

Haptic computer modeling system

Abstract: A computer modeling and visualization system employs both 3D visual modeling and force feedback through a haptic device consistent with the visual display of the computer model Force, or haptic, interaction is employed for exploring computer models Point contact force equations were created for quickly computing forces directly from a model data which are provided to the haptic device, causing it to apply that force to an operator The force equations employed are consistent with isosurface and volume rendering, providing a strong correspondence between visual and haptic rendering The method not only offers the ability to see and feel the volumetric model but allows interactive modification and display of the model

Portable dextrous force feedback master for robot telemanipulation

Abstract: An electronic position sensor and a pneumatic microactuator form a portable robot master that may be operated by the fingers of a user's hand in the same, natural manner that the user would normally grasp an object to be finger manipulated. The master requires only two contact points to secure its ends to the user's fingers and to be manipulated by the user. The master includes a compact, hand-held unit that fits within the space defined by the user's palm and fingers, and functions as a position controller for a robot having a dextrous hand. The position sensor includes a linear variable differential transformer having an output signal that is proportional to the distance between the user's fingers, i.e. the two contact points, that are used to manipulate the master. A force feedback system, including the pneumatic micro-actuator, senses forces exerted by end effectors on the robot hand and causes a corresponding force to be exerted by the user.

Haptic texturing-a stochastic approach

Abstract: All objects have a surface roughness which manifests itself as small forces when objects slide under load against each other. Simulating this roughness haptically enriches the interaction between a user and a virtual world, just as creating graphical textures enhances the depiction of a scene. As with graphical textures, a major design constraint for haptic textures is the generation of a sufficiently "realistic" texture given hard constraints on computational costs. The authors present a simple, fast algorithm to synthesize haptic textures from statistical properties of surfaces. The synthesized texture can be overlaid on other contact models, such as hard contact with Coulomb friction. The algorithm requires minimal hardware support, and can be implemented on a variety of force-feedback mechanisms. It has been successfully implemented on a two-degree-of-freedom haptic interface (the Pantograph).

Design and Multi-Objective Optimization of a Linkage for a Haptic Interface

Abstract: A method to carry out the design of linkage for a haptic interface is described. Factors such as size, workspace, intrusion, inertia, response and structural properties are considered in this process. The dependencies of the various criteria are examined and a hierarchical method is applied. The result is a compact device which is easy to manufacture and which fulfills the requirements demanded by its application. Several quantitative measures designed to capture its principal properties are at the heart the process.