Showing papers on "Haptic technology published in 1985"

Identifying objects by touch: an "expert system".

Abstract: How good are we at recognizing objects by touch? Intuition may suggest that the haptic system is a poor recognition device, and previous research with nonsense shapes and tangible-graphics displays supports this opinion. We argue that the recognition capabilities of touch are best assessed with three-dimensional, familiar objects. The present study provides a baseline measure of recognition under those circumstances, and it indicates that haptic object recognition can be both rapid and accurate.

Hand controllers for teleoperation. A state-of-the-art technology survey and evaluation

Abstract: Hand controller technology for teleoperation is surveyed in three major catagories: (1) hand grip design, (2) control input devices, and (3) control strategies. In the first category, 14 hand grip designs are reviewed and evaluated in light of human factor considerations. In the second, 12 hand controller input devices are evaluated in terms of task performance, configuration and force feedback, controller/slave correspondence, operating volume, operator workload, human limitations, cross coupling, singularities, anthropomorphic characteristics, physical complexity, control/display interference, accuracy, technological base, cost, and reliability. In the third catagory, control strategies, commonly called control modes, are surveyed and evaluated. The report contains a bibliography with 189 select references on hand controller technology.

Intraocular lens with coiled haptics

Abstract: The intraocular lens may have closed loop haptics (23) or open loop haptics (71). Each closed loop haptic (23) has two coil portions (31, 33) and each open loop haptic (71) has one coil portion (77). The purpose of the coil portions (31, 33, 77) is to provide the desired flexibility and to provide for geometric stable haptic flexion upon the application of compression force to the peripheral portions (35, 83) of the haptics (23, 71) towards the lens body (21).

Use of Haptic Training to Modify Impulse and Attention Control Deficits of Learning Disabled Children

Abstract: The purpose of this research was to determine if an haptic training program to teach impulse and attention control to 12 children diagnosed communications handicapped with a secondary classification of neurological impairment could modify their encoding strategies and performance on an haptic discrimination task in the direction of increased reflectivity. The degree to which the effects of haptic training generalized to the educationally more relevant visual modality, and the durability of results for both modalities, were also examined. Significant improvements in scanning and processing times, attention deployment strategies, and response accuracy on the haptic and visual discrimination tasks observed at posttesting and at follow-up, coupled with posttraining increases in reflectivity as measured by the Matching Familiar Figures test, demonstrate the effectiveness, durability, and generalizability of haptic training. Reasons for the intervention's effectiveness in modifying LD children's impulsive cogni...

Sensory-based Control for Robots and Teleoperators

Abstract: This paper presents an overview of the problem of controlling a robot or a teleoperator using sensory information coming from the neighbourhood of the effector After the principles of the local environment were recalled, and the IRISA ‘sensory system’ presented, the control problem was set in terms of elementary actions Then the synthesis in a frame linked to the end effector was performed, as well in force as velocity; then, the dynamic-control problem was reset in a useful form, and the loop with respect to sensory information closed The second part of the paper gives a way to apply this approach to teleoperation A master-slave system was used, and the sensors provide an artificial force feedback information to the operator, or a velocity-control loop to the slave Various modes of interaction with the operator were used A videotape summarizes the main results obtained