Firouzi Kamyar, Nikoozadeh Amin, Carver Thomas E, Khuri-Yakub Butrus Pierre T
IEEE Trans Ultrason Ferroelectr Freq Control. 2016 Dec;63(12):2174-2186. doi: 10.1109/TUFFC.2016.2608781.
Touchscreen sensors are widely used in many devices such as smart phones, tablets, and laptops with diverse applications. We present the design, analysis, and implementation of an ultrasonic touchscreen system that utilizes the interaction of transient Lamb waves with objects in contact with the screen. It attempts to improve on the existing ultrasound technologies, with the potential of addressing some of the weaknesses of the dominant technologies, such as the capacitive or resistive ones. Compared with the existing ultrasonic and acoustic modalities, among other advantages, it provides the capability of detecting several simultaneous touch points and also a more robust performance. The localization algorithm, given the hardware design, can detect several touch points with a very limited number of measurements (one or two). This in turn can significantly reduce the manufacturing cost.
触摸屏传感器广泛应用于许多设备，如智能手机、平板电脑和笔记本电脑，具有多种应用。我们展示了一种超声波触摸屏系统的设计、分析和实现，该系统利用瞬态兰姆波与接触屏幕的物体之间的相互作用。它试图改进现有的超声技术，有可能解决一些主流技术（如电容式或电阻式技术）的弱点。与现有的超声和声学模式相比，它具有诸多优点，包括能够检测多个同时触摸点以及更强大的性能。给定硬件设计，定位算法可以通过非常有限的测量次数（一或两次）检测多个触摸点。这反过来可以显著降低制造成本。
