Research progress and development strategy on tactile sensors for e-skin

Starting from the tactile sensing performance of human skin,the progress and key technologies of tactile sensors for e-skin( electronic skin) akin to human skin by multidisciplinary fields are comprehensively reviewed.The sensing principle,new materials and structures,advanced design and making methods,sensing characteristics and performance of tactile sensors are analyzed. The recent domestic and foreign research advances of electronic skin tactile sensor array in flexibility,elasticity,spatial resolution,sensitivity,fast response,transparency,lightweight,multifunction and other aspects are summarized. It is difficult to achieve the tactile sensors for e-skin with high stretchable and flexible,less complex production process for high sensitivity e-skin,strong extensibility and low cost. The tactile sensors for e-skin can be widely used in robotics,medical health,aeronautics and space military,intelligent manufacturing,automotive security and other fields. The development of tactile sensors for eskin toward the direction of high stretchable and flexible,high sensitivity in wide range,multifunction,self-healing and self-cleaning,self-powered and transparent,has been pointed out.