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首页> 外文期刊>Smart Materials & Structures >Remote light energy harvesting and actuation using shape memory alloy - Piezoelectric hybrid transducer
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Remote light energy harvesting and actuation using shape memory alloy - Piezoelectric hybrid transducer

机译：使用形状记忆合金进行远程光能收集和驱动-压电混合传感器

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摘要

Shape memory alloys (SMAs) exhibit a memory effect which causes the alloy to return to its original shape when heated beyond the transformation temperature. In this study, we show that SMA can be heated remotely by laser and the resulting deformation can be converted into electricity through a piezoelectric bimorph. In addition, the laser actuated SMA deformation can also be used to provide controlled actuation. We provide experimental results demonstrating both the power harvesting and actuation behavior as a function of laser pulse rate. SMA used in this study exhibited higher absorption in the ultraviolet region which progressively decreased as the absorption wavelength increased. Raman analysis revealed TiO2 formation on the surface of SMA, whose concentration increased irreversibly with temperature. Negligible changes in the surface oxidation were detected in the working temperature range (<150 °C).
机译：形状记忆合金（SMA）表现出记忆效应，当加热到相变温度以上时，会导致合金恢复其原始形状。在这项研究中，我们表明SMA可以被激光远距离加热，并且所产生的变形可以通过压电双压电晶片转换为电。此外，激光驱动的SMA变形也可用于提供受控的驱动。我们提供的实验结果证明了功率收集和驱动行为均与激光脉冲频率有关。这项研究中使用的SMA在紫外区域表现出更高的吸收率，随着吸收波长的增加，吸收率逐渐降低。拉曼分析显示SMA表面形成TiO2，其浓度随温度不可逆地增加。在工作温度范围（<150°C）下检测到的表面氧化变化可忽略不计。

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