Human touch is a highly complex and versatile sensing system. The research on the development of artificial haptic systems with similar functions has received continuous attention. Considering the similarity between the action process of the tactile and the frictional motion, the tactile sensor based on the friction nano-generator has been continuously researched. These studies focus on sensing in a single haptic field (eg, contact sensation, sliding haptics, etc.), while human touch is a versatile integrated system. In addition, artificial tactile sensors still require a smarter design.
Recently, a team led by Professor Wang Zhonglin and Professor Cao Xia from the Beijing Institute of Nano-Energy and Systems, Chinese Academy of Sciences, developed a multi-functional integrated tactile sensing system by combining the advantages of single-electrode and two-electrode friction nano-generators. This new multi-functional haptic system combines the advantages of single-electrode friction nano-generators in the fields of contact and positioning, and also takes advantage of the two-electrode mode in the field of mechanical motion sensing, achieving contact, relative hardness, and contact. Location and sensing of external forces. The tactile sensor has a good linear response to external forces in the range of 40-140N. The contact has a planar resolution of 2 mm. Related results are published in the ACS Nano journal (DOI: 10.1021/acsnano.7b00396). This work not only proposes a method of constructing a multifunctional tactile sensing system, but also further demonstrates the application of friction nanogenerators in the field of smart tactile sensing.
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