A wedge transducer is developed using poly-phenylene-sulfide (PPS) as an exciter of high-intensity surface acoustic wave (SAW) to remove droplets adhering to automobiles' front shield glass. Since the front shield glass has a glass/rubber/glass triple-layered configuration, SAW is needed to be employed to confine the vibration energy within the first glass layer and avoid the energy absorption in the rubber layer. PPS is chosen among popular engineering polymers for the vibrating body because its attenuation at ultrasonic frequency is lower than other polymer materials. To assess the feasibility of our proposal, we designed and fabricated a PPS wedge transducer, and investigated the vibration characteristics and the capability to remove droplets. The transducer, which incorporated a lead-zirconate-titanate (PZT) plate and a PPS wedge, had the total volume of 24×20×8.5 mm3. At the voltage of 24.8 V, a SAW having the wavelength of 2 mm and the vibration velocity of 14.5 mm/s was excited on the glass plate, and the droplets were removed with the SAW.

中文翻译：

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用于激发表面声波以去除玻璃板上液滴的聚苯硫醚楔形传感器。

使用聚苯硫醚 (PPS) 作为高强度表面声波 (SAW) 的激励器开发了一种楔形换能器，以去除粘附在汽车前屏蔽玻璃上的液滴。由于前屏蔽玻璃具有玻璃/橡胶/玻璃三层结构，因此需要采用SAW将振动能量限制在第一层玻璃内，避免橡胶层吸收能量。PPS 之所以被选为用于振动体的流行工程聚合物，是因为它在超声波频率下的衰减低于其他聚合物材料。为了评估我们建议的可行性，我们设计并制造了 PPS 楔形换能器，并研究了振动特性和去除液滴的能力。该换能器包含一个锆钛酸铅 (PZT) 板和一个 PPS 楔块，总体积为 24×20×8.5 mm3。在24.8V的电压下，在玻璃板上激发波长为2mm、振动速度为14.5mm/s的SAW，用SAW去除液滴。