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Updated: Jun 15, 2025
An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging
Published on: September 24, 2017
Embedded real-time ultrasound-based multi-touch system
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.
Abstract:
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.
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