Wearable Microfluidic Diaphragm Pressure Sensor for Health and Tactile Touch Monitoring

Yuji Gao, Hiroki Ota, Ethan W. Schaler, Kevin Chen, Allan Zhao, Wei Gao, Hossain M. Fahad, Yonggang Leng, Anzong Zheng, Furui Xiong, Chuchu Zhang, Li Chia Tai, Peida Zhao, Ronald S. Fearing, Ali Javey*

*此作品的通信作者

研究成果: Article同行評審

487 引文 斯高帕斯(Scopus)

摘要

Flexible pressure sensors have many potential applications in wearable electronics, robotics, health monitoring, and more. In particular, liquid-metal-based sensors are especially promising as they can undergo strains of over 200% without failure. However, current liquid-metal-based strain sensors are incapable of resolving small pressure changes in the few kPa range, making them unsuitable for applications such as heart-rate monitoring, which require a much lower pressure detection resolution. In this paper, a microfluidic tactile diaphragm pressure sensor based on embedded Galinstan microchannels (70 µm width × 70 µm height) capable of resolving sub-50 Pa changes in pressure with sub-100 Pa detection limits and a response time of 90 ms is demonstrated. An embedded equivalent Wheatstone bridge circuit makes the most of tangential and radial strain fields, leading to high sensitivities of a 0.0835 kPa−1 change in output voltage. The Wheatstone bridge also provides temperature self-compensation, allowing for operation in the range of 20–50 °C. As examples of potential applications, a polydimethylsiloxane (PDMS) wristband with an embedded microfluidic diaphragm pressure sensor capable of real-time pulse monitoring and a PDMS glove with multiple embedded sensors to provide comprehensive tactile feedback of a human hand when touching or holding objects are demonstrated.

原文English
文章編號1701985
期刊Advanced Materials
29
發行號39
DOIs
出版狀態Published - 18 10月 2017

指紋

深入研究「Wearable Microfluidic Diaphragm Pressure Sensor for Health and Tactile Touch Monitoring」主題。共同形成了獨特的指紋。

引用此