Nikolovski Jean-Pierre
IEEE Trans Ultrason Ferroelectr Freq Control. 2013 Jun;60(6):1178-91. doi: 10.1109/TUFFC.2013.2680.
This paper presents a passive (X, Y) giant tap screen panel (GTP). Based on the time difference of arrival principle (TDOA), the device localizes low-energy impacts of around 1 mJ generated by fingernail taps. Selective detection of A0 Lamb waves generated in the upper frequency spectrum, around 100 kHz, makes it possible to detect light to strong impacts with equal resolution or precision, close to 1 cm and 2 mm, respectively, for a 10-mm-thick and 1-m(2) glass plate. Additionally, with glass, symmetrical beveling of the edges is used to create a tsunami effect that reduces the minimum impacting speed for light taps by a factor of three. Response time is less than 1 ms. Maximum panel size is of the order of 10 m(2). A rugged integrated flat design with embedded transducers in an electrically shielding frame features waterproof and sticker/ tag proof operation. Sophisticated electronics with floating amplification maintains the panel at its maximum possible sensitivity according to the surrounding noise. Amplification and filtering turns the panel into a microphone and loudspeaker featuring 50 mV/Pa as a microphone and up to 80 dBlin between 500 Hz and 8 kHz as a loudspeaker.
本文介绍了一种无源（X，Y）巨型触摸屏幕面板（GTP）。该设备基于到达时间差原理（TDOA），可对指甲轻敲产生的约1 mJ的低能量撞击进行定位。通过选择性检测在约100 kHz的高频谱中产生的A0兰姆波，对于一块10毫米厚、1平方米的玻璃板，能够分别以接近1厘米和2毫米的分辨率或精度检测从轻到强的撞击。此外，对于玻璃，边缘的对称斜切用于产生海啸效应，将轻敲的最小撞击速度降低了三分之一。响应时间小于1毫秒。最大面板尺寸约为10平方米。一种坚固的集成平面设计，在电屏蔽框架中嵌入了换能器，具备防水和防贴纸/标签的功能。带有浮动放大功能的精密电子设备可根据周围噪声将面板保持在尽可能高的灵敏度。放大和滤波功能使面板成为一个麦克风和扬声器，作为麦克风时为50 mV/Pa，作为扬声器时在500 Hz至8 kHz之间可达80 dBlin。
