Signal Detection Performance with a Haptic Device
نویسندگان
چکیده
Haptic interfaces are becoming more widely used in virtual reality simulations because of their enhancement to performance in training and simulation. Unintended vibration degrades the effectiveness of a haptic device and can reduce the user's ability to detect small details in the surface of simulated hard objects. Two important design factors for controlling haptic device vibrations are servo update rate and resistive force magnitude. This work employs a signal detection and receiver operator characteristic methodology to evaluate the interaction of these two factors on a user's ability to perceive small details in a hard surface. In a two-factor, full factorial experiment, six male research participants rated their confidence in detecting a 5mm upward step along a simulated hard surface. The independent variables were resistive force magnitude (1.63N or 4.88N) and update rate (468Hz or 1630Hz). The results indicate a significant interaction of the two variables. Participants demonstrated a 69% success rate with the strong force, slow update rate compared with a 86% success rate in the other 3 conditions. The participants may have employed a strategy of detecting the lack of oscillations when entering the surface and then noted their kinesthetic motion while moving back to the oscillating state experience when sliding along the surface of the simulated edge. Either increasing the update rate or reducing the resistive force magnitude can mitigate the effects of vibration when using a haptic device.
منابع مشابه
Detection Thresholds and Performance Gains for Small Haptic Effects
Detection Thresholds and Performance Gains for Small Haptic Effects
متن کاملDesign of a Lightweight, Cost Effective Thimble-Like Sensor for Haptic Applications Based on Contact Force Sensors
This paper describes the design and calibration of a thimble that measures the forces applied by a user during manipulation of virtual and real objects. Haptic devices benefit from force measurement capabilities at their end-point. However, the heavy weight and cost of force sensors prevent their widespread incorporation in these applications. The design of a lightweight, user-adaptable, and co...
متن کاملInclusion Probing: Signal Detection and Haptic Playback of 2d Fem and Experimental Data
The task of probing a medium for an inclusion is cast as a signal detection problem. A sufficient statistic is developed for determining the existence and location of an inclusion. The analysis shows the human limitationsof palpationwhen using a probe and the limitations imposed by a haptic display either when emulating such an environment or when relaying related information in a teleoperated ...
متن کاملSimulation study of the performance of a biologically sensitive field effect transistor
The transformation of biochemical information into a physical or chemical signal is the basic idea behind a biosensor. The efficient detection of charged biomolecules by biosensor with appropriate device has caught tremendous research interest in the present decade. The present work is related to the simulation study of the performance of a functionalized surface of a biologically sensitive fie...
متن کامل