Verification of Haptic Illusions Using a Haptic Interface and Consideration on its Mechanism

2006 ◽  
Vol 18 (4) ◽  
pp. 476-488 ◽  
Author(s):  
Masayuki Hara ◽  
◽  
Takahiro Higuchi ◽  
Ayaka Ohtake ◽  
Jian Huang ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Human Perception ◽  
Tactile Display ◽  
Haptic Interface ◽  
Display Device ◽  
Haptic Interfaces ◽  
Realistic Force ◽  
Weight Illusion ◽  
New Hypothesis ◽  
Unique Mechanism

In these days, a haptic interface, which is a force/tactile display device, is attracting great interest in virtual reality. With regard to this technology, researchers have reported ways to construct virtual environment and development of new devices with a unique mechanism but rarely explored the relationships between human perception and virtual dynamics. This paper suggests that it is necessary to clarify the relationships to provide more realistic force/tactile sensation for users. The main purpose of this study is to evaluate the force sensations displayed by haptic interfaces. This study focused on two haptic illusion phenomena, which are a haptic horizontal-vertical illusion and a size-weight illusion. Results of experiments using the haptic interface verified that such haptic illusions are reproducible in virtual reality. This implies that perceptual experiments can be realized using haptic interfaces, which may have potential to discover new haptic illusions. Further, this paper attempts to study the size-weight illusion by using functions of the haptic interface such as position and force sensing functions and propose a new hypothesis on the size-weight illusion. These results demonstrate that the effectiveness of haptic interfaces for perceptual experiments.

scholarly journals Human Perception Test of Discontinuous Force and a Trial of Skill Transfer Using a Five-Fingered Haptic Interface

2010 ◽  
Vol 2010 ◽  
pp. 1-14 ◽  
Author(s):  
Takahiro Endo ◽  
Tomohiro Kanno ◽  
Mana Kobayashi ◽  
Haruhisa Kawasaki
Keyword(s):  
Virtual Reality ◽  
Human Perception ◽  
Haptic Interface ◽  
Skill Transfer ◽  
Transfer System ◽  
Spatial Change ◽  
Fingertip Force

In the transferring of expert skills, it takes a great deal of time and effort for beginners to obtain new skills, and it is difficult to teach the skills by using only words. For those reasons, a skill transfer system that uses virtual reality (VR) and a haptic interface technique is very attractive. In this study, we investigated the human perception of fingertip force with respect to the following changes: (1) the spatial change of the presented force, and (2) the change of the time to present the force. Based on the results of the perception experiments, we considered the skill transfer to a person's five fingers by using a five-fingered haptic interface robot.

scholarly journals Cable-Suspended Haptic Interface

1998 ◽  
Vol 3 (3) ◽  
pp. 13-20 ◽  
Author(s):  
Robert L. Williams II
Keyword(s):  
Virtual Reality ◽  
Degree Of Freedom ◽  
Haptic Interface ◽  
Human Operator ◽  
Haptic Interfaces ◽  
Input Output ◽  
Output Device ◽  
Present Concept ◽  
Six Degree Of Freedom

A cable-suspended haptic interface (CSHI) concept is presented. The goal is to create an input/output device to provide six-degree-of-freedom (dof) wrench (force and moment) feedback to a human operator in virtual reality or remote applications. Compared to commercially-available haptic interfaces for virtual reality applications, the present concept is driving for lighter, safer, crisper, more dexterous, and more economical operation. The CSHI concept is presented, along with the required mathematical transformations for use of the device.

A Touch/Force Display System for Haptic Interface

2001 ◽  
Vol 10 (2) ◽  
pp. 225-235 ◽  
Author(s):  
Tsuneo Yoshikawa ◽  
Akihiro Nagura
Keyword(s):  
Control Algorithm ◽  
Tactile Display ◽  
Haptic Interface ◽  
Virtual Object ◽  
Display Device ◽  
Display System ◽  
Virtual Reality Technology ◽  
Display Devices ◽  
Sensory Channel ◽  
The Difference

The importance of force and tactile display in virtual reality technology has been recognized recently, and much research has been undertaken, including development of various force and/or tactile display devices. However, many of these devices are always in contact with the fingers or hands of the operators, and it is impossible for an operator to feel the difference between a contact and a noncontact state with a virtual object directly from tactile sensory channel in his/her finger or hand. This paper presents a new haptic display device that we have developed that provides both touch and force feeling to the operator's fingers. The device tracks the operator's finger without contact when the finger is not in contact with any virtual object. When some virtual object is in contact with the finger, the device touches and displays force to the finger. A control algorithm for the system is given to display the dynamics of the virtual objects. Preliminary experimental results are also presented to show the feasibility of the device and the validity of the control algorithm.

Augmented Reality--Implications toward Virtual Reality, Human Perception and Performance

2012 ◽  
Author(s):  
R. A. Grier ◽  
H. Thiruvengada ◽  
S. R. Ellis ◽  
P. Havig ◽  
K. S. Hale ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Augmented Reality ◽  
Human Perception ◽  
And Performance

scholarly journals Multiclass emotion prediction using heart rate and virtual reality stimuli

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Aaron Frederick Bulagang ◽  
James Mountstephens ◽  
Jason Teo
Keyword(s):  
Heart Rate ◽  
Virtual Reality ◽  
Nearest Neighbor ◽  
Subject Classification ◽  
Support Vector ◽  
Display Device ◽  
K Nearest Neighbor ◽  
Potential Applications ◽  
Health Rehabilitation ◽  
Emotion Model

Abstract Background Emotion prediction is a method that recognizes the human emotion derived from the subject’s psychological data. The problem in question is the limited use of heart rate (HR) as the prediction feature through the use of common classifiers such as Support Vector Machine (SVM), K-Nearest Neighbor (KNN) and Random Forest (RF) in emotion prediction. This paper aims to investigate whether HR signals can be utilized to classify four-class emotions using the emotion model from Russell’s in a virtual reality (VR) environment using machine learning. Method An experiment was conducted using the Empatica E4 wristband to acquire the participant’s HR, a VR headset as the display device for participants to view the 360° emotional videos, and the Empatica E4 real-time application was used during the experiment to extract and process the participant's recorded heart rate. Findings For intra-subject classification, all three classifiers SVM, KNN, and RF achieved 100% as the highest accuracy while inter-subject classification achieved 46.7% for SVM, 42.9% for KNN and 43.3% for RF. Conclusion The results demonstrate the potential of SVM, KNN and RF classifiers to classify HR as a feature to be used in emotion prediction in four distinct emotion classes in a virtual reality environment. The potential applications include interactive gaming, affective entertainment, and VR health rehabilitation.

Design and evaluation of a high-performance haptic interface

Robotica ◽  
1996 ◽  
Vol 14 (3) ◽  
pp. 321-327 ◽  
Author(s):  
R.E. Ellis ◽  
O.M. Ismaeil ◽  
M.G. Lipsett
Keyword(s):  
High Performance ◽  
Dynamic Range ◽  
Evaluation Criteria ◽  
Haptic Interface ◽  
Human Operator ◽  
Haptic Interfaces ◽  
Environment Design ◽  
Mechanical Constraints ◽  
Computer Controlled ◽  
The Many

SUMMARYA haptic interface is a computer-controlled mechanism designed to detect motion of a human operator without impeding that motion, and to feed back forces from a teleoperated robot or virtual environment. Design of such a device is not trivial, because of the many conflicting constraints the designer must face.As part of our research into haptics, we have developed a prototype planar mechanism. It has low apparent mass and damping, high structural stiffness, high force bandwidth, high force dynamic range, and an absence of mechanical singularities within its workspace. We present an analysis of the human-operator and mechanical constraints that apply to any such device, and propose methods for the evaluation of haptic interfaces. Our evaluation criteria are derived from the original task analysis, and are a first step towards a replicable methodology for comparing the performance of different devices.

DECAFF: Experimental Study on Human Haptic Perception

2000 ◽  
Author(s):  
Scott L. Springer ◽  
Nicola J. Ferrier
Keyword(s):  
Interface Design ◽  
Haptic Perception ◽  
Human Perception ◽  
Initial Contact ◽  
Haptic Interfaces ◽  
Feed Forward ◽  
Feed Forward Control ◽  
Contact Distance ◽  
Traditional Approaches ◽  
And Control

Abstract DECAFF is a method for design and control of haptic interfaces that utilizes a DE-Coupled Actuator and Feed-Forward control. In this paper results of an experimental investigation are presented that quantify improved human haptic perception while using the DECAFF system, compared to the traditional haptic interface design and control systems. Perception improvements include the increased stability for rigid surfaces and increased ability of subjects to accurately identify initial contact with virtual surface boundaries. Traditional haptic interfaces employ an actuator directly coupled to the human operator that provides a force proportional to wall penetration distance and velocity. The DECAFF paradigm for design and control of haptic displays utilizes a de-coupled actuator and pre-contact distance sensing as a feed forward control term to improve stability and response performance. A human perception experiment has been performed that compares the touch sensation of the subjects for both the DECAFF system and traditional approaches to haptic display. In the human factors study the quality of rigid body display is evaluated in addition to the sensitivity of touch experienced by the subjects while making initial contact with virtual surfaces.

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