Bioinspired Tactile Sensation Based on Synergistic Microcrack-Bristle Structure Design toward High Mechanical Sensitivity and Direction-Resolving Capability  

作　　者：Yiqun Zhang Qi Liu Wenjuan Ren Yangyang Song Hua Luo Yangyang Han Liang He Xiaodong Wu Zhuqing Wang 

机构地区：[1]School of Mechanical Engineering,Sichuan University,Chengdu 610065,China [2]Med+X Center for Manufacturing,West China Hospital,Sichuan University,Chengdu 610041,China [3]State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Chengdu 610065,China

出　　处：《Research》2024年第1期611-624,共14页研究（英文）

基　　金：the Sichuan Science and Technology Program(2022YFS0025);the project“Key Technologies and Applications of Sensitive Components for Pathogenic Microorganisms and Metabolic Markers of Misease”(2021YFB3201200);This work was also supported by the“Fundamental Research Funds for the Central Universities of China.”

摘　　要：Natural tactile sensation is complex,which involves not only contact force intensity detection but also the perception of the force direction,the surface texture,and other mechanical parameters.Nevertheless,the vast majority of the developed tactile sensors can only detect the normal force,but usually cannot resolve shear force or even distinguish the directions of the force.Here,we present a new paradigm of bioinspired tactile sensors for resolving both the intensity and the directions of mechanical stimulations via synergistic microcrack-bristle structure design and cross-shaped configuration engineering.The microcrack sensing structure gives high mechanical sensitivity to the tactile sensors,and the synergistic bristle structure further amplifies the sensitivity of the sensors.The cross-shaped configuration engineering of the synergistic microcrack-bristle structure further endows the tactile sensors with good capability to detect and distinguish the directions of the applied mechanical forces.The as-fabricated tactile sensors exhibit a high sensitivity(25.76 N^(−1)),low detection limit(5.4 mN),desirable stability(over 2,500 cycles),and good capability to resolve both mechanical intensity and directional features.As promising application scenarios,surface texture recognition and biomimetic path explorations are successfully demonstrated with these tactile sensors.This newly proposed tactile sensation strategy and technology have great potential applications in ingenious tactile sensation and construction of various robotic and bionic prostheses with high operational dexterity.

关 键 词：crack SENSATION DIRECTIONS 

分 类 号：TG142[一般工业技术—材料科学与工程]