A flexible sensing system capable of sensations imitation and motion monitoring with reliable encapsulation

Abstract In this work, a flexible multiple sensor system is demonstrated for robotic and prosthetic applications. The system consists of two strain sensors, a microheater, a temperature sensor and a pressure sensor for imitating different sensations of human skin. The strain sensors are designed for monitoring the movement and bending angle of the fingers; while the temperature and pressure sensors are used to collect the information of temperature, grabbing force and stiffness of the objects being grabbed, respectively. Combination of the temperature sensor and microheater mimics the temperature sensation of human skin, allowing measuring temperature and apparent temperature of the objects grasped. Liquid metal with reliable polymer encapsulation is innovatively used to interface the sensor system with peripheral circuits. This allows reliable signal transmission and processing for the flexible sensor system for strains up to 40%. This multiple sensor system is capable of precisely monitoring movement of fingers, providing different sensations and judging some characteristics of objects for a robot hand.

[1]  Shurong Dong,et al.  High resolution skin-like sensor capable of sensing and visualizing various sensations and three dimensional shape , 2015, Scientific Reports.

[2]  Sung-Hoon Kim,et al.  Flexible Multimodal Tactile Sensing System for Object Identification , 2006, 2006 5th IEEE Conference on Sensors.

[3]  V. Lumelsky,et al.  Sensitive skin , 2000, IEEE Sensors Journal.

[4]  Gerald E. Loeb,et al.  Haptic feature extraction from a biomimetic tactile sensor: Force, contact location and curvature , 2011, 2011 IEEE International Conference on Robotics and Biomimetics.

[5]  R. Dauskardt,et al.  An ultra-sensitive resistive pressure sensor based on hollow-sphere microstructure induced elasticity in conducting polymer film , 2014, Nature Communications.

[6]  Benjamin C. K. Tee,et al.  25th Anniversary Article: The Evolution of Electronic Skin (E‐Skin): A Brief History, Design Considerations, and Recent Progress , 2013, Advanced materials.

[7]  Rong Zhu,et al.  Electronic Skin with Multifunction Sensors Based on Thermosensation , 2017, Advanced materials.

[8]  K. Mabuchi,et al.  Ultraflexible, large-area, physiological temperature sensors for multipoint measurements , 2015, Proceedings of the National Academy of Sciences.

[9]  J. A. Fishel,et al.  Sensing tactile microvibrations with the BioTac — Comparison with human sensitivity , 2012, 2012 4th IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob).

[10]  Sam Emaminejad,et al.  Fully integrated wearable sensor arrays for multiplexed in situ perspiration analysis , 2016, Nature.

[11]  Rebecca K. Kramer,et al.  Sensor Skins: An Overview , 2016 .

[12]  Mona E. Zaghloul,et al.  Flexible packaging of solid-state integrated circuit chips with elastomeric microfluidics , 2013, Scientific Reports.

[13]  W. C. Leong,et al.  Application of flexible printed circuit board (FPCB) in personal computer motherboards: Focusing on mechanical performance , 2012, Microelectron. Reliab..

[14]  Z. Lou,et al.  Recent Developments in Graphene‐Based Tactile Sensors and E‐Skins , 2018 .

[15]  Ellen A. Lumpkin,et al.  Mechanisms of sensory transduction in the skin , 2007, Nature.

[16]  Zhenan Bao,et al.  Fabrication of flexible pressure sensors with microstructured polydimethylsiloxane dielectrics using the breath figures method , 2015 .

[17]  Wai Yin Wong,et al.  Clinical Applications of Sensors for Human Posture and Movement Analysis: A Review , 2007, Prosthetics and orthotics international.

[18]  Honghai Liu,et al.  Multi-Modal Sensing Techniques for Interfacing Hand Prostheses: A Review , 2015, IEEE Sensors Journal.

[19]  Yonggang Huang,et al.  Ultrathin conformal devices for precise and continuous thermal characterization of human skin. , 2013, Nature materials.

[20]  A. B. Kaiser,et al.  Heterogeneous model for conduction in conducting polymers and carbon nanotubes , 2001 .

[21]  Benjamin C. K. Tee,et al.  Highly sensitive flexible pressure sensors with microstructured rubber dielectric layers. , 2010, Nature materials.

[22]  Yei Hwan Jung,et al.  Stretchable silicon nanoribbon electronics for skin prosthesis , 2014, Nature Communications.

[23]  Q. Wang,et al.  Fast Fabrication of Flexible Functional Circuits Based on Liquid Metal Dual‐Trans Printing , 2015, Advanced materials.

[24]  M. C. Tracey,et al.  Mechanical characterization of bulk Sylgard 184 for microfluidics and microengineering , 2014 .

[25]  A. B. Kaiser,et al.  Electronic transport properties of conducting polymers and carbon nanotubes , 2001 .