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A Flexible Wearable Pressure Sensor with Bioinspired Microcrack and Interlocking for Full-Range Human-Machine

Ying Guo¹, Zhiyuan Guo¹, Mengjuan Zhong¹

¹Center of Advanced Elastomer Materials & Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.

Small (Weinheim an Der Bergstrasse, Germany)

|September 25, 2018

Summary

This study introduces a novel flexible wearable pressure sensor inspired by spider and beetle systems. It offers ultrasensitive, full-range monitoring for healthcare and human-machine interaction, overcoming previous limitations.

Keywords:

bioinspired electronic skins full-range healthcare monitoring graphene wearable pressure sensors

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Area of Science:

Materials Science
Biomimetics
Wearable Technology

Background:

Flexible wearable pressure sensors are crucial for healthcare monitoring but face challenges like limited range, sensitivity, and stability.
Existing sensors often have complex fabrication processes, hindering widespread application.

Purpose of the Study:

To develop a flexible wearable pressure sensor with enhanced performance for ultrasensitive, full-range healthcare monitoring.
To address limitations of current sensors regarding sensing range, sensitivity, mechanical stability, and fabrication complexity.

Main Methods:

A hierarchically microstructured framework combining microcrack and interlocking designs was developed, inspired by spider and beetle sensory systems.
The sensor's performance was evaluated for strain deformations, response/recovery time, sensitivity, reproducibility, and application in electronic skins and robotics.

Main Results:

The sensor achieved a wide full-range monitoring capability (0.2-80% strain) with fast response/recovery times (22 ms/20 ms).
It demonstrated ultrasensitive detection (25 mg), high reproducibility (>10,000 cycles), and potential for Parkinson's disease tremor prediction.
The sensor was successfully integrated into artificial electronic skins for pressure mapping and used for wireless human-motion monitoring with robots.

Conclusions:

The bioinspired flexible wearable pressure sensor overcomes key limitations of existing technologies.
This advancement enables new possibilities in ultrasensitive healthcare monitoring, human-machine interfaces, and smart robotics.