Wang Jingxiao, Wei Xueyong, Shi Junli, Bai Ningning, Wan Xiao, Li Bing, Chen Yingchun, Jiang Zhuangde, Guo Chuan Fei
State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.
Nat Commun. 2024 Aug 17;15(1):7094. doi: 10.1038/s41467-024-51415-5.
Flexible skins that can be laminated on curved surfaces are a desired form for wind pressure measurement. Sensors for such applications need to detect both negative and positive wind pressure with ultrahigh pressure resolution over a wide range up to 600 kPa, whereas existing flexible sensors are unsatisfactory to such demands. Here, we report a flexible skin containing two iontronic pressure sensors for negative pressure and positive pressure sensing, respectively, and show the potential of the skin for pressure measurement in room temperature wind tunnels. We control the contact state of iontronic interface of a sensor to introduce a pre-pressure that enables negative pressure sensing, exhibiting a pressure resolution of -20 Pa (0.025%) within a broad pressure regime (from -100 kPa to -10 Pa). The other sensor for positive pressure sensing exhibits a pressure-resolution of 100 Pa (0.025%) over 600 kPa, in addition to a wide frequency bandwidth up to 400 Hz. The skin with the two types of sensors can be attached on curved surfaces of wing surface for pressure measurement at various free stream velocities and angles of attack. This study provides a promising technology of using flexible skins for pressure measurement in aviation applications.
可层压在曲面上的柔性蒙皮是风压测量的理想形式。此类应用的传感器需要在高达600 kPa的宽范围内以超高压力分辨率检测正负风压，而现有的柔性传感器无法满足此类需求。在此，我们报告了一种柔性蒙皮，它包含两个分别用于负压和正压传感的离子电子压力传感器，并展示了该蒙皮在室温风洞压力测量中的潜力。我们通过控制传感器离子电子界面的接触状态来引入预压力，从而实现负压传感，在宽压力范围（从-100 kPa到-10 Pa）内展现出-20 Pa（0.025%）的压力分辨率。另一个用于正压传感的传感器在600 kPa范围内的压力分辨率为100 Pa（0.025%），此外还具有高达400 Hz的宽频率带宽。带有这两种传感器的蒙皮可附着在机翼表面的曲面上，用于在各种自由流速度和攻角下进行压力测量。本研究提供了一种在航空应用中使用柔性蒙皮进行压力测量的有前景的技术。
