A Tactile Simulation Approach to Enhance Virtual Prototypes Interaction

2011 ◽  
Author(s):  
Maura Mengoni ◽  
Paolo Morichetti ◽  
Margherita Peruzzini ◽  
Michele Germani
Keyword(s):  
Emotional Response ◽  
Software Tool ◽  
Tactile Display ◽  
Material Surface ◽  
Simulation Approach ◽  
Multisensory Interaction ◽  
Product Experience ◽  
Materials Simulation ◽  
Virtual Prototypes ◽  
Skin Mechanoreceptors

Materials simulation in virtual prototyping is one of the most challenging issues as not completely fulfilled by current devices. It allows Virtual Reality-based interfaces to provide multisensory interaction and to enhance product experience by mainly stimulating user emotional response. In this context the paper presents a new tactile simulation approach based on material surface properties elaboration and processing to stimulate roughness and texture coarseness perception. The developed approach leads to the development of a tactile display and a software tool to manage the configuration of selective stimulating signals. The main problem the research aims at overcoming, regards with the nature of signals adopted by most electrotactile displays and the way to stimulate skin mechanoreceptors. The paper focuses on the description of the adopted approach and of the implemented software tool in order to control the tactile display.

A Method for Roughness and Texture Simulation via Tactile Displays

2011 ◽  
Author(s):  
Maura Mengoni ◽  
Paolo Morichetti ◽  
Margherita Peruzzini ◽  
Michele Germani
Keyword(s):  
Mechanical Vibration ◽  
Synthesis Method ◽  
Software Tool ◽  
Tactile Display ◽  
System Response ◽  
Good Reliability ◽  
Tactile Displays ◽  
Real Material ◽  
Selection Of ◽  
Skin Mechanoreceptors

This paper presents a tactile synthesis method to provide roughness and texture coarseness sensations using a selective stimulation approach implemented by a tactile display. Digitizing, elaborating and processing real material surfaces obtain signals. The selection of their frequency range is based on the reactive frequencies of SAI and FAI types receptors. An electro-tactile display provided with a mechanical vibration to stimulate FAII units located at the deeper skin layers has been developed. A SW tool allows to manage selective signals modulation and configuration according to the displayed material. The research aims at overcoming a crucial problem concerning the signals adopted by most electro-tactile displays to stimulate skin mechanoreceptors. The paper focuses on the description of the adopted method and of the implemented software tool to control the tactile display. Preliminary experimentations were carried out to measure the system’s latency, accuracy and reliability. Experimental sessions show a promising system response: minimal latency (30ms), good reliability (>98%) and acceptable accuracy (>70%).

Virtualization of Industrial Consumer Products for Haptic Interaction Design

2011 ◽  
Author(s):  
Francesco Ferrise ◽  
Marco Ambrogio ◽  
Elia Gatti ◽  
Joseba Lizaranzu ◽  
Monica Bordegoni
Keyword(s):  
Interaction Design ◽  
Emotional Response ◽  
Haptic Feedback ◽  
End Users ◽  
Consumer Products ◽  
Consumer Product ◽  
Haptic Interaction ◽  
Successful Strategy ◽  
Virtual Prototypes ◽  
The Aesthetic

The haptic feedback perceived during the interaction with consumer products is an important aspect since it concurs in creating, together with the aesthetic features and sonic feedback, the emotional response during the first contacts with a product. And this may be decisive for the user’s decision of purchasing a product instead of another one. So the design of the haptic behavior of interaction elements of products can be both a successful strategy for capturing consumers’ attention but even a need for avoiding problems during the use. The paper describes the process of virtualization of the interaction with an industrial consumer product by means of haptic, sound and visualization technologies in order to obtain a prototype (interactive Virtual Prototypes) useful to design and test the haptic feedback of interaction elements directly with end users.

Design of a Novel Human-Computer Interface to Support HCD Application

2010 ◽  
Author(s):  
Maura Mengoni ◽  
Barbara Colaiocco ◽  
Michele Germani ◽  
Margherita Peruzzini
Keyword(s):  
User Interfaces ◽  
Affective Response ◽  
Sensory Stimulation ◽  
Human Interaction ◽  
Product Experience ◽  
Technical Developments ◽  
Usability Tests ◽  
Early Design Stages ◽  
Virtual Prototypes ◽  
The One

The importance of Human-Centered Design (HCD) drives research toward the development of new UIs (User Interfaces) in order to predict human interaction with products at the early design stages. Virtual Reality (VR) allows carrying out usability tests on virtual prototypes to investigate users’ cognitive and affective response. Application problems regard with the reproduction of synaesthesia qualities in order to make the information processing similar to the one obtained by real sensory stimulation. While visualization technologies seem to be mature enough to overcome the above mentioned limitation, tactile devices are still far from properly simulating materials properties. In this context, the present work aims at structuring and applying a systematic approach to conceive, define and develop a novel VR-based technology, called I-perTouch. The goal is to stimulate the skin mechanoreceptors to generate a meaningful tactile sensation about materials softness, friction and roughness. The system can be also integrated with imaging and sound technologies to create a multi-sensorial product experience. The preliminary architecture results from the analysis of human tactile perception and the benchmark of available simulation devices and techniques. This paper contributes to discuss current issues of existing VR-based technologies in supporting HCD applications and to address technical developments toward the creation of a reliable system for texture perception.

Prototyping for the Product Experience: An Example in the Household Appliances Industry

2014 ◽  
Author(s):  
Monica Bordegoni ◽  
Umberto Cugini ◽  
Francesco Ferrise ◽  
Serena Graziosi
Keyword(s):  
New Product ◽  
Emotional Reactions ◽  
Household Appliances ◽  
Product Experience ◽  
Physical Interfaces ◽  
Virtual Prototypes ◽  
Domestic Appliances ◽  
The Way

The objective of the paper is to present a case study to exploit interactive Virtual Prototypes (iVPs) for investigating the way humans experience products. This method can be used for “prototyping” new product experiences, for monitoring users’ emotional reactions during the interaction and finally, for practically redesigning these experiences on the basis of the users’ feedback. Products considered here are domestic appliances, where the experience consists of the interaction with their physical interfaces.

Suppression of γ’ Precipitation in a Laser-Melted Nickel-Base Alloy

1977 ◽  
Vol 35 ◽  
pp. 270-271
Author(s):  
J. M. Walsh ◽  
J. C. Whittles ◽  
B. H. Kear ◽  
E. M. Breinan
Keyword(s):  
Cooling Rate ◽  
Base Alloy ◽  
Material Surface ◽  
Intimate Contact ◽  
Absorbed Power ◽  
Perfect Contact ◽  
Nickel Base ◽  
Rapidly Solidified ◽  
Limiting Case ◽  
The Heat Transfer Coefficient

Conventionally cast γ’ precipitation hardened nickel-base superalloys possess well-defined dendritic structures and normally exhibit pronounced segregation. Splat quenched, or rapidly solidified alloys, on the other hand, show little or no evidence for phase decomposition and markedly reduced segregation. In what follows, it is shown that comparable results have been obtained in superalloys processed by the LASERGLAZE™ method.In laser glazing, a sharply focused laser beam is traversed across the material surface at a rate that induces surface localized melting, while avoiding significant surface vaporization. Under these conditions, computations of the average cooling rate can be made with confidence, since intimate contact between the melt and the self-substrate ensures that the heat transfer coefficient is reproducibly constant (h=∞ for perfect contact) in contrast to the variable h characteristic of splat quenching. Results of such computations for pure nickel are presented in Fig. 1, which shows that there is a maximum cooling rate for a given absorbed power density, corresponding to the limiting case in which melt depth approaches zero.

Microstructures of Laser Processed Fe-Cr Surface Alloys

1981 ◽  
Vol 39 ◽  
pp. 328-329
Author(s):  
P. A. Molian ◽  
K. H. Khan ◽  
W. E. Wood
Keyword(s):  
Cooling Rate ◽  
Pure Iron ◽  
Continuous Wave ◽  
Laser Surface ◽  
Material Surface ◽  
Constitution Diagram ◽  
Incident Power ◽  
Surface Alloying ◽  
Laser Surface Alloying ◽  
Spot Diameter

In recent years, the effects of chromium on the transformation characteristics of pure iron and the structures produced thereby have been extensively studied as a function of cooling rate. In this paper, we present TEM observations made on specimens of Fe-10% Cr and Fe-20% Cr alloys produced through laser surface alloying process with an estimated cooling rate of 8.8 x 104°C/sec. These two chromium levels were selected in order to study their phase transformation characteristics which are dissimilar in the two cases as predicted by the constitution diagram. Pure iron (C<0.01%, Si<0.01%, Mn<0.01%, S=0.003%, P=0.008%) was electrodeposited with chromium to the thicknesses of 40 and 70μm and then vacuum degassed at 400°F to remove the hydrogen formed during electroplating. Laser surface alloying of chromium into the iron substrate was then performed employing a continuous wave CO2 laser operated at an incident power of 1200 watts. The laser beam, defocussed to a spot diameter of 0.25mm, scanned the material surface at a rate of 30mm/sec, (70 ipm).

Emotional Experiences of Students in the Classroom

2010 ◽  
Vol 15 (2) ◽  
pp. 142-151 ◽  
Author(s):  
Wondimu Ahmed ◽  
Greetje van der Werf ◽  
Alexander Minnaert
Keyword(s):  
Heart Rate ◽  
Emotional Response ◽  
Task Difficulty ◽  
Physiological Reactivity ◽  
Emotional Experiences ◽  
Heart Rate Monitoring ◽  
Coding Scheme ◽  
Stimulated Recall ◽  
Response Systems ◽  
The Relationship

In this article, we report on a multimethod qualitative study designed to explore the emotional experiences of students in the classroom setting. The purpose of the study was threefold: (1) to explore the correspondence among nonverbal expressions, subjective feelings, and physiological reactivity (heart rate changes) of students’ emotions in the classroom; (2) to examine the relationship between students’ emotions and their competence and value appraisals; and (3) to determine whether task difficulty matters in emotional experiences. We used multiple methods (nonverbal coding scheme, video stimulated recall interview, and heart rate monitoring) to acquire data on emotional experiences of six grade 7 students. Concurrent correspondence analyses of the emotional indices revealed that coherence between emotional response systems, although apparent, is not conclusive. The relationship between appraisals and emotions was evident, but the effect of task difficulty appears to be minimal.

Emotional Response Paradigm

1972 ◽  
Vol 17 (4) ◽  
pp. 210-211
Author(s):  
PHILIP G. ZIMBARDO
Keyword(s):  
Emotional Response
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