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Auflistung nach Schlagwort "Haptics"

1 - 5 von 5
  • Konferenzbeitrag
    Cobity: A Plug-And-Play Toolbox to Deliver Haptics in Virtual Reality
    (Mensch und Computer 2022 - Tagungsband, 2022) Villa, Steeven; Mayer, Sven
    Haptics increase the presence in virtual reality applications. However, providing room-scale haptics is an open challenge. Cobots (robotic systems that are safe for human use) are a promising approach, requiring in-depth engineering skills. Control is done on a low abstraction level and requires complex procedures and implementations. In contrast, 3D tools such as Unity allow to quickly prototype a wide range of environments for which cobots could deliver haptic feedback. To overcome this disconnect, we present Cobity, an open-source plug-and-play solution to control the cobot using the virtual environment, enabling fast prototyping of a wide range of haptic experiences. We present a Unity plugin that allows controlling the cobot using the end-effector’s target pose (cartesian position and angles); the values are then converted into velocities and streamed to the cobot inverse kinematic solver using a specially designed C++ library. Our results show that Cobity enables rapid prototyping with high precision for haptics. We argue that Cobity simplifies the creation of a wide range of haptic feedback applications enabling designers and researchers in human-computer interaction without robotics experience to quickly prototype virtual reality experiences with haptic sensations. We highlight this potential by presenting four different showcases.
  • Konferenzbeitrag
    Enabling Reusable Haptic Props for Virtual Reality by Hand Displacement
    (Mensch und Computer 2021 - Tagungsband, 2021) Auda, Jonas; Gruenefeld, Uwe; Schneegass, Stefan
    Virtual Reality (VR) enables compelling visual experiences. However, providing haptic feedback is still challenging. Previous work suggests utilizing haptic props to overcome such limitations and presents evidence that props could function as a single haptic proxy for several virtual objects. In this work, we displace users’ hands to account for virtual objects that are smaller or larger. Hence, the used haptic prop can represent several differently-sized virtual objects. We conducted a user study (N = 12) and presented our participants with two tasks during which we continuously handed them the same haptic prop but they saw in VR differently-sized virtual objects. In the first task, we used a linear hand displacement and increased the size of the virtual object to understand when participants perceive a mismatch. In the second task, we compare the linear displacement to logarithmic and exponential displacements. We found that participants, on average, do not perceive the size mismatch for virtual objects up to 50% larger than the physical prop. However, we did not find any differences between the explored different displacement. We conclude our work with future research directions.
  • Konferenzbeitrag
    Fühlbares Blättern in E-Books - Konzeption und Evaluation eines haptischen Ansatzes für digitales Lesen
    (Mensch und Computer 2019 - Tagungsband, 2019) Ali, Hajar; Hansen, Torsten; Sietas, Jacob; Reinhold, Sascha; Teistler, Michael
    Die sinnliche Wahrnehmung ist ein wichtiger Teil des Lesens. Physische Bücher werden haptisch wahrgenommen, etwa beim Umblättern einer Seite mit den Fingern. Beim Blättern auf aktuellen E-Book-Readern fehlt diese Fühlbarkeit. In dieser Forschungsarbeit wurde untersucht, ob sich die User Experience eines E-Book-Readers durch fühlbares Blättern verbessert. Dazu wurde ein Prototyp eines E-Book-Readers entwickelt, bei dem aufgeklebte Nylondrähte den Vorgang des Blätterns fühlbar machen. Der Prototyp wurde in einem quantitativen und qualitativen Nutzertest mit einem E-Book-Reader mit Touchscreen-Steuerung per Laufleiste verglichen. Im Ergebnis erlaubte die Variante mit Laufleiste ein schnelleres Blättern. Der Prototyp mit Nylondrähten wurde jedoch in den Kategorien pragmatische Qualität, hedonische Qualität und Attraktivität im Mittel besser bewertet. Das fühlbare Blättern ermöglicht eine präzisere Handhabung. Dies könnte erklären, warum die Probanden die pragmatische Qualität des Prototyps trotz langsameren Blätterns höher bewerteten. Fühlbares Blättern kann somit zur Verbesserung der Akzeptanz von E-Books beitragen.
  • Konferenzbeitrag
    Give Weight to VR: Manipulating Users’ Perception of Weight in Virtual Reality with Electric Muscle Stimulation
    (Mensch und Computer 2022 - Tagungsband, 2022) Faltaous, Sarah; Prochazka, Marvin; Auda, Jonas; Keppel, Jonas; Wittig, Nick; Gruenefeld, Uwe; Schneegass, Stefan
    Virtual Reality (VR) devices empower users to experience virtual worlds through rich visual and auditory sensations. However, believable haptic feedback that communicates the physical properties of virtual objects, such as their weight, is still unsolved in VR. The current trend towards hand tracking-based interactions, neglecting the typical controllers, further amplifies this problem. Hence, in this work, we investigate the combination of passive haptics and electric muscle stimulation to manipulate users’ perception of weight, and thus, simulate objects with different weights. In a laboratory user study, we investigate four differing electrode placements, stimulating different muscles, to determine which muscle results in the most potent perception of weight with the highest comfort. We found that actuating the biceps brachii or the triceps brachii muscles increased the weight perception of the users. Our findings lay the foundation for future investigations on weight perception in VR.
  • Workshopbeitrag
    HapRing: A Wearable Haptic Device for 3D Interaction
    (Mensch und Computer 2015 – Proceedings, 2015) Ariza Nunez, Oscar Javier; Lubos, Paul; Steinicke, Frank
    Haptic devices have the capability to offer good solutions in terms of usability and accuracy related to touch feedback on immersive virtual environments (IVEs). However, there are very few affordable devices to perform natural interaction in a 3D space and some do not represent a suited solution for the common ergonomic and stimuli-meaningfulness issues. In this article, we present a wireless haptic ring (HapRing) for spatial interaction, providing vibro-tactile signals as well as vibration cues on a finger-basis using a haptic actuator. Other features include inertial measurement, digital input and support for IR camera-based tracking.