Bilodeau Maxime, Moriot Jérémy, Fréchette-Viens Joëlle, Bouchard Raphaël, Boulais Philippe, Quaegebeur Nicolas, Masson Patrice
Department of Mechanical Engineering, Centre de Recherche Acoustique-Signal-Humain de l'Université de Sherbrooke, Université de Sherbrooke, Sherbrooke, J1K 2R1, Québec,
JASA Express Lett. 2024 Aug 1;4(8). doi: 10.1121/10.0028323.
In this paper, an active ultrasound-based touchscreen technology is presented for real-time monitoring of multiple contacts on a glass panel of 20 × 19 cm. Both fundamental Lamb wave modes are generated by sending a linear chirp between 50 and 100 kHz to a single piezoelectric ceramic lead zirconate titanate. Measurement is performed using four piezoelectric ceramic lead zirconate titanate elements, and real-time localization and detection are performed on a system on module i.MX 8 M Nano. Results show that Lamb waves can be used for real-time multi-touch detection and localization on both sides of the panel. Moreover, the prototype developed allows for relative pressure measurement.
本文提出了一种基于有源超声的触摸屏技术，用于实时监测尺寸为20×19厘米的玻璃面板上的多个触点。通过向单个锆钛酸铅压电陶瓷发送50至100kHz之间的线性调频脉冲来产生两种基本的兰姆波模式。使用四个锆钛酸铅压电陶瓷元件进行测量，并在i.MX 8 M Nano模块系统上进行实时定位和检测。结果表明，兰姆波可用于面板两侧的实时多点触摸检测和定位。此外，所开发的原型还可进行相对压力测量。
