Composite Flexible Sensor Based on Bionic Microstructure to Simultaneously Monitor Pressure and Strain

Author:

Wang Meng12,Lin Zhaohua3,Ma Suqian14,Yu Yingqing1,Chen Boya1,Liang Yunhong14ORCID,Ren Lei14

Affiliation:

1. The Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun 130025 China

2. Center of Reproductive Medicine Center of Prenatal Diagnosis The First Hospital of Jilin University Changchun 130021 China

3. School of Mechanical and Aerospace Engineering Jilin University Changchun 130025 China

4. Institute of Structured and Architected Materials Liaoning Academy of Materials Shenyang 110167 China

Abstract

AbstractTo achieve the human sense of touch, a strain sensor needs to be coupled with a pressure sensor to identify the compliance of the contacted material. However, monitoring the pressure‐strain signals simultaneously and ensuring no coupling effect between the two signals is the technical bottleneck for the flexible tactile sensor to. Herein, a composite flexible sensor based on microstructures of lotus leaf is designed and manufactured, which integrates the capacitive pressure sensor and the resistance strain sensor into one pixel to realize the simultaneous detection of pressure and strain. The electrode layer of the capacitance sensor also plays the role of the resistance strain sensor, which greatly simplifies the structure of the composite flexible sensor and obtains the compact size to integrate more easily. The device can simultaneously detect pressure and deformation, and more importantly, there is no coupling effect between the two kinds of signals. Here, the sensor has high pressure sensitivity (0.784 kPa−1 when pressure less than 100 kPa), high strain sensitivity (gauge factor = 4.03 for strain 0–40%), and can identify materials with different compliance, which indicates the tactile ability as the human skin performs.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

First Hospital of Jilin University

Publisher

Wiley

Subject

Pharmaceutical Science,Biomedical Engineering,Biomaterials

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