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Tactile Displays for Virtual Reality Applications

用于虚拟现实应用的触觉显示器

基本信息

批准号：
224743555
负责人：
Professor Dr.-Ing. Jörg Wallaschek
金额：
--
依托单位：
Institut für Mikroproduktionstechnik (IMPT)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/224743555?language=en
关键词：
Tactile Displays Virtual Reality Applications

项目摘要

Object of this proposal is the development, construction and the trial of a tactile display intended to stimulate the mechanoreceptors within the human skin. The display is able to exert forces and vibrations to the fingertip in normal as well as lateral direction. For this purpose a piezoelectrical bending actuator is combined with an electromagnetically driven normal force actuator into a single pin. Besides dimensioning of the pins, the interaction between individual actuators has to be investigated. If necessary, an electronically controlling scheme has to be developed in order to adjust the performance of the individual actuators of the whole system. The electronics for driving this combined actuators aims for expandability and therefore consists of several modules including a main processing board and a variable amount of signal generators and operational amplifiers. The resulting system is particularly compact and can be operated autonomously without the need for an external computer. The data for controlling the individual pins is generated by a neurophysiological motivated model based on Finite Element simulations. It aims to create adequate stimuli for the mechanoreceptors using the display to approximate the original tactile impression as close as possible. The model is able to transfer real surface topography to complex vibration patterns in order to recreate the originally occurring vibration patterns at the receptors position closely. An intermediate representation called "tactile map" is used to store an abstract representation of the surface and allows to take coarse as well as fine surface features into account. Based on our newly developed 4-pin tactile display, an extension of the driving electronics and our new innovative model for creating the stimuli, the concept needs to be extended to a 4x4 actuator array. Besides creating the conductor paths for addressing each of the 32 degrees of freedom of the final display, the bearing of the coupled actuator may need optimizations. Additionally, the driving electronics need to be extended. The driving electronics should also track the tactile display's orientation besides its position. This way, natural movement of the user's finger can be mapped to the model more accuratly. The performance of the combined system then needs to be evaluated extensively by a series of trials. These studies will be conducted in cooperation with a perceptual psychologist.

该提案的目的是开发、构建和试验旨在刺激人体皮肤内的机械感受器的触觉显示器。显示器能够在法向和横向方向上向指尖施加力和振动。为此，压电弯曲致动器与电磁驱动法向力致动器组合成单个销。除了销钉的尺寸之外，还必须研究各个执行器之间的相互作用。如有必要，必须开发电子控制方案以调整整个系统的各个执行器的性能。用于驱动这种组合执行器的电子设备旨在实现可扩展性，因此由多个模块组成，包括主处理板以及数量可变量的信号发生器和运算放大器。由此产生的系统特别紧凑，可以自主操作，无需外部计算机。用于控制各个销钉的数据是由基于有限元模拟的神经生理学驱动模型生成的。它的目的是使用显示器为机械感受器创造足够的刺激，以尽可能接近原始的触觉印象。该模型能够将真实的表面形貌转换为复杂的振动模式，以便紧密地重现接收器位置处最初发生的振动模式。称为“触觉图”的中间表示用于存储表面的抽象表示，并允许考虑粗略和精细的表面特征。基于我们新开发的 4 针触觉显示器、驱动电子设备的扩展以及我们用于创建刺激的新创新模型，该概念需要扩展到 4x4 执行器阵列。除了创建用于寻址最终显示器的 32 个自由度中的每一个的导体路径之外，耦合致动器的轴承可能需要优化。此外，驱动电子设备需要扩展。除了位置之外，驱动电子设备还应该跟踪触觉显示器的方向。这样，用户手指的自然运动可以更准确地映射到模型。然后需要通过一系列试验对组合系统的性能进行广泛评估。这些研究将与感知心理学家合作进行。