调频压电触觉显示器

中文摘要 AI 辅助

我们提出了一种基于压电振动执行器的调频（FM）触觉显示器。现有的触觉显示器通常通过单个触觉像素的形变幅度来编码触觉强度。尽管调幅（AM）方法已实现紧凑的触觉像素，但独立控制大量像素的形变幅度可能需要日益复杂和庞大的驱动系统，这对向高密度、大面积可穿戴显示器的扩展构成了挑战。为了解决这一扩展挑战，我们研究了一种调频设计原理，其中触觉强度通过振动频率进行编码。我们进一步开发了一种“共享源调频”（SSFM）结构，其中多个触觉像素由公共功率放大器供电，同时它们的振动频谱被独立控制，从而减少了对每个像素独立高功率放大的需求。我们构建了一个概念验证的压电触觉显示器，并通过志愿者测试评估了其渲染空间和时间触觉模式的能力。结果表明，参与者在所研究的操作范围内能够可靠地区分使用调频原理编码的空间和时间模式。这些发现证明了基于调频的分布式触觉渲染的可行性，并为未来高密度、大面积可穿戴触觉显示器提供了一条通往更紧凑驱动架构的潜在途径。

英文摘要

We present a frequency-modulated (FM) haptic display based on piezoelectric vibrating actuators. Existing haptic displays commonly encode haptic intensity through the deformation amplitude of individual haptic pixels. Although amplitude-modulated (AM) approaches have enabled compact haptic pixels, independently controlling the deformation amplitude of a large number of pixels can require increasingly complex and bulky driving systems, posing challenges for scaling toward high-density, large-area wearable displays. To address this scaling challenge, we investigate an FM design principle in which haptic intensity is encoded through vibration frequency. We further develop a \textit{Shared-Source Frequency Modulation} (SSFM) structure in which multiple haptic pixels are powered by a common power amplifier while their vibration spectrum are controlled individually, reducing the need for independent high-power amplification at each pixel. A proof-of-concept piezoelectric haptic display was built and evaluated on rendering spatial and temporal haptic patterns through volunteer tests. The results show that participants reliably distinguished spatial and temporal patterns encoded using FM principles within the investigated operating range. These findings demonstrate the feasibility of FM-based distributed haptic rendering and suggest a potential pathway toward more compact driving architectures for future high-density, large-area wearable haptic displays.

发表机构

• University of California, Berkeley（加州大学伯克利分校）

机构由 AI 辅助整理，请以论文原文为准。