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We propose a device that can display translational force and torque by using two vibration speakers. Each vibration speaker generates an asymmetric vibration when a sound with an asymmetric amplitude is inputted. Asymmetric vibrations induce perceived forces that pull or push a user's hand in a particular direction. The user can perceive translational force and/or torque with his/her thumb and index...
This paper presents a system that consists of three robots to imitate the motion of top volleyball blockers. In a volleyball match, in order to score by spiking, it is essential to improve the spike decision rate of each spiker. To increase the spike decision rates, iterative spiking training with actual blockers is required. Therefore, in this study, a block machine system was developed that can...
This paper describes the properties of sensations induced by a vibration speaker-type non-grounded haptic interface. We confirm that the vibration speaker generates a perceived force that pulls or pushes a user's hand in a particular direction when an asymmetric amplitude sound signal that is generated by inverting a part of a sine wave is input. We developed a prototype system and conducted evaluation...
In this study, a haptic rendering method named indirect haptic feedback is proposed. In traditional haptic interfaces for the index finger, the contact point of the finger and the point of application of force are the same when touching a virtual object. As a result, in the augmented reality environment, a user is unable to touch a real object with his/her bare hand through traditional haptic interfaces...
New methodology is required to set appropriate cells at right position to prepare 3 dimensional tissue in regenerative medicine. We have been synthesized single-stranded DNA-conjugated poly(ethylene) glycol-phospholipid (ssDNA-PEG-lipid), which is the amphiphilic conjugate of PEG-lipid and single-stranded DNA and examined as a cell adhesive. New methodology using ssDNA-PEG-lipid as a cell adhesive...
This paper describes development of a haptic interface to provide haptic and visual sensation of remote real objects, which are placed at various distances from a user. The system consists of a laser range finder, a 1 degree-of-freedom haptic apparatus, a see-through visual display and a micro-computer. The haptic apparatus can generate a reaction force based on a distance between the interface and...
This paper describes the development of a gait rehabilitation system with a locomotion interface (LI) for stair climbing or descending. The LI consists of two 2 DOF manipulators equipped with footpads. These can move the user's feet while his or her body remains stationary. The footpads follow the prerecorded motion of the feet of a healthy individual. For gait training, the user progresses iteratively...
This paper describes the development of a gait rehabilitation system with a locomotion interface (LI) for stair climbing or descending. The LI consists of two 2 DOF manipulators equipped with footpads. These can move the user's feet while his or her body remains stationary. The footpads follow the prerecorded motion of the feet of a healthy individual. For gait training, the user progresses iteratively...
This paper describes development of a haptic sensor and display system that is sensing hardness and temperature of a real object simultaneously and displaying them as a virtual object. The sensor system consists of a force sensor, a linear-encoder, and a thermistor. And the display system is composed of a DC motor, a rotary-encoder, and a planer end effecter which mounts a peltier device. Evaluation...
This paper describes the evaluation of cortical activity during gait training with a Locomotion Interface (LI). The LI consists of two 2DOF motion-platforms with footpads. In this research, the footpads follow a prescribed motion. The user experiences the motion iteratively as gait training. Using near infrared spectroscopy (NIRS), the cortical activity was measured to assess the impact of our system...
This paper describes the development of a motion teaching system that uses VR technology. The system consists of a haptic interface and an immersive projection display. The haptic interface is a force display that makes use of a gyroscopic force. The immersive projection display has 3 large screens that cover the front, bottom and -right-hand sides of the user. The display can project a video avatar,...
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