A double-layer flexible sensor array with an active thermal insulation method for fluid wall shear stress was fabricated in this study and evaluated experimentally. Static calibration of the sensor was studied in both wind and water tunnels and the experimental results reveal that the sensor’s static performance was improved by active thermal insulation. Compared to single-layer methods, the static sensitivity of the proposed double-layer sensor is increased by approximately 48% in a wind tunnel and 13% in a water tunnel. Additionally, consistent deviations in the static calibration coefficients of sensors with different basic parameters were clearly compensated in the wind tunnel. The calibration coefficient deviation of the sensors was reduced from 57% in single-layer mode to 5% in double-layer mode.

中文翻译：

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用于流体壁剪切应力测量的双层热膜传感器的制作和静态校准

本研究制造了一种采用主动绝热方法解决流体壁剪切应力的双层柔性传感器阵列，并进行了实验评估。在风洞和水洞中都对传感器的静态标定进行了研究，实验结果表明，通过主动绝热可以提高传感器的静态性能。与单层方法相比，建议的双层传感器的静态灵敏度在风洞中增加了约48％，在水洞中增加了13％。此外，具有不同基本参数的传感器的静态校准系数的偏差在风洞中得到了明显补偿。传感器的校准系数偏差从单层模式的57％降低到双层模式的5％。