嵌入式实时基于超声波的多触摸系统
Maxime Bilodeau1, Jérémy Moriot1, Joëlle Fréchette-Viens1
1Department of Mechanical Engineering, Centre de Recherche Acoustique-Signal-Humain de l'Université de Sherbrooke, Université de Sherbrooke, Sherbrooke, J1K 2R1, Québec, Canadamaxime.bilodeau2@usherbrooke.ca, jeremy.moriot@usherbrooke.ca, joelle.frechette-viens@usherbrooke.ca, raphael.bouchard2@usherbrooke.ca, philippe.boulais@usherbrooke.ca, nicolas.quaegebeur@usherbrooke.ca, patrice.masson@usherbrooke.ca.
JASA express letters
|August 28, 2024
概括
这项研究介绍了一种基于超声波的触摸屏,使用Lamb波来实时多触摸检测和玻璃面板上的定位. 该技术还可实现相对压力测量,增强交互式表面功能.
科学领域:
- 材料科学 材料科学 材料科学
- 声学 声学 在声学上
- 人与计算机的交互
背景情况:
- 传统的触摸屏在多触摸精度和压力传感方面存在局限性.
- 超声波技术为先进的触摸交互提供了一个潜在的途径.
研究的目的:
- 开发和评估一个基于超声波的触摸屏系统.
- 为了实现在玻璃面板上实时监控多个触点.
- 评估使用该技术进行相对压力测量的可行性.
主要方法:
- 使用了通过压电陶酸 (PZT) 转换器通过线性声 (50-100 kHz) 生成的基本Lamb波模式.
- 使用四个PZT元件进行信号测量.
- 在模块上的i.MX 8M Nano系统上实现实时定位和检测.
主要成果:
- 在20x19厘米玻璃面板的两侧展示了成功的实时多触摸检测和定位.
- 证实了Lamb波对于精确触摸事件跟踪的能力.
- 验证了原型执行相对压力测量的能力.
结论:
- 基于超声波的触摸屏技术有效地实现了实时多触摸检测和定位.
- 羔羊波传播是先进的交互式表面应用的可行方法.
- 开发的原型显示了对压力敏感触摸接口的前景.
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