journal article·2024

A flexible dual-mode sensor with decoupled strain and temperature sensing for smart robots

Shiying Li, Mengyu Yang, Yuanzhao Wu, Waqas Asghar, Xingjian Lu, Haifeng Zhang, Enhong Cui, Zaojun Fang, Jie Shang, Yiwei Liu, Run-Wei Li

Materials Horizons· Volume 11· Issue 24
Publisher page

Abstract

Flexible dual mode strain-temperature sensors that mimic human skin functions are highly desired for wearable devices and intelligent robots. However, integrating dual sensing characteristics into a single sensor for simultaneous and decoupled strain-temperature detection still remains a challenge. Herein, we report a flexible dual-modal sensor that uses a "neutral surface" structural design technique to integrate an independently prepared temperature sensing layer (TSL) and strain sensing layer (SSL), for simultaneous monitoring of strain and temperature, in a decoupled manner. The TSL consists of a PDMS/BaTiO3 based dielectric layer whose dielectric constant and thickness change in response to temperature fluctuations. The SSL consists of a resistive type Ni80Cr20 film whose resistance changes in response to external strain. After optimizing the temperature and strain sensing characteristics of the TSL and SSL, the obtained dual-modal flexible sensor has shown a broad temperature sensing range (30 to 200 °C), with high temperature sensitivity (-160.90 fF °C-1), excellent linearity (0.998), and highly discernible temperature resolution (0.1 °C). Additionally, the sensor has also exhibited a wide strain monitoring range (20 to 1000 με), good strain resolution (20 με or 0.002%), and a fast strain response time (54 ms). When practically demonstrated, our sensor has successfully shown independent perception of strain and temperature, which highlights its promising application potential in the fields of smart robotics and intelligent prosthetics.
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Research context

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Tactile and Sensory Interactions · Gas Sensing Nanomaterials and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China

Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China

Mechanical Engineering Department, University of Engineering and Technology Taxila, 47050, Taxila, Pakistan

Shandong Aluminum Valley Testing Center, Shandong Aluminum Valley Industrial Technology Institute, Bingzhou, 256200, P. R. China

Zhejiang Key Laboratory of Robots and Intelligent Manufacturing Equipment Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China

School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Funding

National Natural Science Foundation of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences · Key Research and Development Program of Zhejiang Province · Science and Technology Department of Zhejiang Province · Natural Science Foundation of Zhejiang Province · Natural Science Foundation of Ningbo Municipality · Ningbo Municipal Science and Technology Innovative Research Team · Ningbo Municipal Bureau of Education · National Key Research and Development Program of China

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