Textile‐Based Wireless Pressure Sensor Array for Human‐Interactive Sensing

By Baoqing Nie, Rong Huang, Ting Yao, Yiqiu Zhang, Yihui Miao, Changrong Liu, Jian Liu, Xinjian Chen. Advanced Functional Materials, 2019

199 citations recorded by the source corpus.

A textile‐based wireless pressure sensor array (WiPSA) is proposed for flexible remote tactile sensing applications. The WiPSA device is composed of a fabric spacer sandwiched by two separate layers of passive antennas and ferrite film units. Under the external pressure, the mechanical compression of the flexible fabric spacer leads to an inductance change, which can further be transduced to a detectable shift of the resonant frequency. Importantly, WiPSA integrates the ferrite film featuring an ultrahigh permeability, which effectively improves the device sensitivity and avoids the interference of conductive materials simultaneously. The device performance with a high quality factor (>35) and sensitivity (−0.19 MHz kPa−1) within a pressure range of 0–20 kPa is demonstrated. In addition, WiPSA achieves excellent reproducibility under periodical pressures (>20 000 cycles), temperature fluctuations (15–103 °C), and humidity variations (40–99%). As a proof of concept for human‐interactive sensing, WiPSA is successfully 1) integrated with a flexible wrist band for fingertip pressure‐guided direction choices, 2) developed into a smart wireless insole to map the plantar stress distributions, and 3) embedded into a waist‐supporting belt to resolve the contact pressure between the belt and human abdomen in a remote transmitting scheme.

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/b8e34e3765cbb02c48f9a967cdaabb09ebd759bc

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Citations in the corpus

Textile-Based Flexible Pressure Sensors: A Review (2021, background): “Nie et al.[73] illustrated a textile-based flexible Wireless Pressure Sensor Array (WiPSA) of 1 8 units, of which each sensing unit comprises a layer of soft fabric spacer, sandwiched between an antenna and a piece of ferrite thin film.”