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A Self-Compensated Dual-Function Sensor for Simultaneously Gesture Recognition and Temperature Perception
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DOI：10.1002/adfm.75966.png)
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Abstract
En 中文
Multifunctional flexible sensors utilizing a single active material are crucial for creating compact, integrated, and mechanically compliant human–machine interaction systems. However, when multiple physical effects coexist in one material, intrinsic multi-physics coupling often causes signal crosstalk and affects sensing accuracy. Herein, a temperature-strain dual-function sensor based on a Bi2Te3 film is constructed and a self-compensation strategy is introduced to suppress temperature-induced drift in the strain readout. The thermoelectric voltage generated by the Bi2Te3 film serves as an in situ temperature indicator to correct the influence of temperature drift on the strain-sensing signal. Consequently, the impact of temperature on the relative error of strain sensing decreased from −4.6 to 6% K−1, making an 87% reduction in absolute terms. Furthermore, a wearable gesture recognition and temperature perception system was established and enabled simultaneous recognition of various postures, deformation degrees, and object/environmental temperature changes. This system highlights the potential of single-material-based self-compensated sensors in intelligent interactive electronics, representing an important step forward in advancing the practical application.
Keywords:
Bi₂Te₃ thin film
gesture
piezoresistive effect
self-compensation
signal
temperature–strain sensing
thermoelectric effect
Journal
IF:
19
Papers:
3.4W
Citations:
32.1W