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Related Concept Videos

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The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
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An integrated temperature-compensated flexible shear-stress sensor microarray with concentrated leading-wire.

Jian Tang1, Wu Liu1, Weiping Zhang1

  • 1National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Micro Fabrication of the Ministry of Education and Shanghai Key Lab of Navigation and Location-based Services, Department of Micro-Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

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|March 3, 2016
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Summary

A new flexible shear stress sensor microarray with twenty channels was developed for curved surface flow analysis. This high-performance sensor offers a large output response and low nonlinearity, crucial for accurate flow characterization.

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Area of Science:

  • Fluid Mechanics
  • Sensor Technology
  • Materials Science

Background:

  • Characterizing shear stress on curved surfaces is vital for understanding complex fluid dynamics.
  • Existing sensors often face limitations in flexibility and integration for curved flow applications.

Purpose of the Study:

  • To design and validate a novel integrated shear stress sensor microarray for flexible, curved surfaces.
  • To achieve high sensitivity and low nonlinearity in shear stress measurements.

Main Methods:

  • Development of a twenty-parallel-channel shear stress sensor microarray.
  • Utilizing Wheatstone bridges and constant-temperature-difference mode for hot-wire operation.
  • Implementing temperature compensation circuits to prevent crosstalk.

Main Results:

  • The sensor microarray demonstrated effective prevention of temperature crosstalk between adjacent hot-wires.
  • Verified effectiveness of temperature-compensated circuits for stable measurements.
  • Achieved a sensitivity of approximately 0.086 V(2)/Pa(1/3) with nonlinearity below 1%.

Conclusions:

  • The novel integrated shear stress sensor microarray exhibits high performance for curved surface flow characterization.
  • The sensor design ensures accurate and reliable shear stress measurements in challenging flow environments.