Developments in global pressure and shear sensors are invaluable for flow visualization and force measurement and are indispensable tools for research in fluid mechanics. Here, we introduce a bio-inspired pressure-sensitive film that has high spatial resolution and a wide measurement range. The film is embedded with fluorescent elastic microspheres that emit light under appropriate excitation. These microspheres can be compressed under external pressure, and they fully recover as pressure is released. This pressure-induced deformation causes variations in microsphere emission intensity, establishing a quantitative relationship between pressure and emission intensity. Furthermore, this film has the potential for shear-force sensing via the use of digital image correlation to measure the displacements of microspheres under shear force. This functional film has an impressively broad scope of sensing applications, such as in air-flows, underwater, and in tactile-based settings.Developments in global pressure and shear sensors are invaluable for flow visualization and force measurement and are indispensable tools for research in fluid mechanics. Here, we introduce a bio-inspired pressure-sensitive film that has high spatial resolution and a wide measurement range. The film is embedded with fluorescent elastic microspheres that emit light under appropriate excitation. These microspheres can be compressed under external pressure, and they fully recover as pressure is released. This pressure-induced deformation causes variations in microsphere emission intensity, establishing a quantitative relationship between pressure and emission intensity. Furthermore, this film has the potential for shear-force sensing via the use of digital image correlation to measure the displacements of microspheres under shear force. This functional film has an impressively broad scope of sensing applications, such as in air-flows, underwater, and in tactile-based settings.

中文翻译：

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一种嵌入荧光弹性微球的仿生功能膜，用于压力传感

全球压力和剪切传感器的发展对于流动可视化和力测量是非常宝贵的，并且是流体力学研究不可或缺的工具。在这里，我们介绍了一种具有高空间分辨率和宽测量范围的仿生压敏薄膜。该薄膜嵌入了荧光弹性微球，在适当的激发下会发光。这些微球可以在外部压力下被压缩，并在压力释放时完全恢复。这种压力引起的变形会导致微球发射强度发生变化，从而在压力和发射强度之间建立定量关系。此外，通过使用数字图像相关性来测量微球在剪切力下的位移，该薄膜具有剪切力传感的潜力。这种功能性薄膜具有令人印象深刻的广泛传感应用，例如在气流、水下和基于触觉的环境中。全局压力和剪切传感器的发展对于流动可视化和力测量是非常宝贵的，并且是研究中不可或缺的工具流体力学。在这里，我们介绍了一种具有高空间分辨率和宽测量范围的仿生压敏薄膜。该薄膜嵌入了荧光弹性微球，在适当的激发下会发光。这些微球可以在外部压力下被压缩，并在压力释放时完全恢复。这种压力引起的变形会导致微球发射强度发生变化，从而在压力和发射强度之间建立定量关系。此外，通过使用数字图像相关性来测量微球在剪切力下的位移，该薄膜具有剪切力传感的潜力。这种功能性薄膜具有令人印象深刻的广泛传感应用，例如在气流、水下和基于触觉的环境中。