Publications (20) View all
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Conference Proceeding: Proactive Desk II: Development of a New Multi-object Haptic Display Using a Linear Induction Motor
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ABSTRACT: The Proactive Desk is a force feedback system using a two-degree of freedom linear induction motor (LIM) designed for ordinary desktop operations. The system provides two-dimensional force feedback on a desktop surface, but only for a single object. This means that when several users operate this system together, only one user at a time can acquire force feedback from the system. In this paper, we propose a new-generation haptic display, Proactive Desk II, which uses an advanced LIM for multi-object driving, and develop a prototype system based on our approach. The system employs a cluster of coils for producing magnetic fluxes individually underneath the desktop, and those synthesize several traveling magnetic fields as a result. These magnetic fields simulate a local region of the field generated by our first-generation system, being able to drive multiple objects separately.Virtual Reality Conference, 2006; 04/2006 -
Conference Proceeding: Controlling the Perceived Vibrational Frequency and Amplitude of a Voice-Coil-Type Tactor
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ABSTRACT: When designing a vibrotactile information display, it is important to present correct, stable stimulation. However, the mechanical stability of the vibration is affected by many conditions such as how the vibrators are attached to the person, where they are attached, and other factors. In order to maintain the target frequency and amplitude of the vibration independent of the affective factors, we propose a feedback method for vibrotactile displays.Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2006 14th Symposium on; 04/2006 -
Conference Proceeding: The TactaPack: A Wireless Sensor/Actuator Package for Physical Therapy Applications
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ABSTRACT: In this paper, we present preliminary work we have done on designing the TactaPack, a wearable sensor/actuator device that uses a Bluetooth wireless connection to return sensor data to a host, and to receive commands to initiate expressive vibrotactile stimuli. We present our work in the context of a physical therapy application designed to provide more autonomy for patients when performing rehabilitative exercises. This assistive technology has the potential to reduce injuries during therapy due to improper patient joint movement, and decrease the workload of physical therapists, thereby reducing healthcare costs. Though still in the early stages of design, we believe the TactaPack can be used to produce systems that are less cumbersome than current, wired solutions, and simplify the creation of high-level applications by offloading from the CPU to the device the process of sensing, testing against threshold values, and actuation.Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2006 14th Symposium on; 04/2006 -
Conference Proceeding: A Study of Mounting Methods for Tactors Using an Elastic Polymer
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ABSTRACT: Vibrotactile displays are expected to be useful and effective tools for presenting personal information. However, various external factors, such as the orientation of the tactor or pressure applied to it, affect the consistency of the vibration. Here, we propose a new robust mounting method for a traditional tactor using an elastic polymer. Results from simulated experiments using FEM and a user study indicate that our proposed method provides more consistent vibrotactile sensation than conventional methods, independent of outside forces.Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2006 14th Symposium on; 04/2006 -
Conference Proceeding: Towards Effective Information Display Using Vibrotactile Apparent Motion
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ABSTRACT: In this paper, we explore the use of tactile apparent motion at different speeds for information display. A prototype vibrotactile tactor array was constructed, consisting of three rings of five voice-coil tactors each, and mounted on the upper arm of test subjects. The results of two experiments are presented: a study on the sensitivity to differences in apparent motion speed, and a study on users’ ability to differentiate four motion patterns at three different speeds. Users had little trouble with pattern identification, but found absolute speed recognition difficult. Several ideas for future exploration of tactile apparent motion for general-purpose information displays are presented.Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2006 14th Symposium on; 04/2006
