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Magnetically Orientation-Enhanced Gradient Modulus Strain-Insensitive Pressure Sensor
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DOI：10.1016/j.coco.2026.102923.png)
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Abstract
En 中文
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Constructing an in-plane and normal double-gradient structure based on field-oriented control.
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Exhibits strain-insensitive behaviour at 0-50 per cent elongation.
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Implementation of high-sensitivity, wide-range (0-100 kPa) pressure detection.
Abstract
Epidermal-like stretchable pressure sensors are essential for detecting physical interactions within dynamic biological tissues, prosthetics, and robotic systems. However, their pressure sensing accuracy is consistently compromised by interference from lateral strain. This study presents a magnetically oriented gradient-modulus pressure sensor designed to overcome this limitation. By leveraging a structure with distinct modulus differences along both the in-plane and normal directions, the sensor achieves both strain insensitivity and a graded, high-sensitivity response to pressure. Customizable elastomer modulus is achieved by adjusting Ni particle content. Tensile deformation of the elastic mesh induces minimal effect on the rigid sensing units, conferring excellent strain insensitivity. Furthermore, a graded pressure response is engineered through systematic modulus variations, enabling the sensing units to exhibit high sensitivity (0.0174 kPa<sup>−1</sup>) over a broad detection range (0-100 kPa). A 4×4 sensor array was fabricated, successfully demonstrating its capability for biophysical signal detection and object recognition, thereby highlighting its potential for practical applications.
Keywords:
magnetically oriented
strain-insensitive
gradient modulus
pressure sensing
Journal
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