Research On The Reproduction Of Textile Roughness And Softness Based On Virtual Reality Technology

Nowadays,online shopping has become the mainstream way of shopping.Information can be exchanged with commodities through vision during online shopping,but only limited commodity informations such as appearance,price and color can be obtained through visual interaction,lacking the interactive experience of tactile.With the improvement of social productivity and the development of computer technology,virtual reality(Virtual Reality,VR)technology is gradually mature,and the tactile reproduction with the help of virtual reality technology,will become a new trend of information interaction for online shopping.The existing methods of reproducing touch sensations rarely have a comprehensive reproduction of two or more tactile sensations,and the quality of touch sensation reproduction is easily affected by the surrounding environment.In order to meet the requirements of remote interactive experience of textile roughness and softness,a comprehensive reproduction method of textile roughness and softness was proposed in this thesis based on the simulation device of roughness and softness and virtual reality environment.The vibration unit precisely controlled by the voice coil motor and the neoprene membrane unit wrapped with magnetorheological fluid were reproduced respectively the roughness and softness of textiles at different levels respectively.While the roughness and softness were reproducing,through the synchronization of tactile data,the textile model and virtual shopping mall environment of the corresponding tactile level were presented in the VR glasses,for the reproduction of the roughness and softness of textiles based on virtual reality assistance.In the construction of the roughness and softness simulation device,ie,the reproduction device,"element spacing" and "texture height","bending stiffness" and "response density" were respectively established as important factors for the reproduction of roughness and softness.The mapping relationship between the reproduction factors and the control parameters in the reproduction method was studied.According to Stevens’ law,a roughness and softness reproduction model of textiles characterized by vibration frequency,voltage amplitude,magnetic field current and contact area was finally established.According to the proposed rough and soft touch reproduction method,a rough and soft touch reproduction system including reproduction device,hardware circuit,VR system and upper computer software was developed.The upper computer software developed based on Lab View established communication with VR engine Unity3 D through UDP(User Datagram Protocol)protocol.Based on Unity3 D,the construction of the virtual shopping mall environment and the modeling of the textile touch level were completed,and the virtual reality shopping mall environment and textile models were presented by using VR glasses.The perception experiment of rough and soft touch level of textile samples was carried out,and the reproduction model was obtained by fitting and solving the reproduction touch level corresponding to the combination of each control parameter through the rough and soft tactile reproduction device.Finally,a comprehensive reproduction verification experiment of textile roughness and softness based on virtual reality was carried out,which verifies the effectiveness of the reproduction model and the reproduction method.In this thesis,a comprehensive reproduction method of textile roughness and softness was proposed,a reproduction mapping model was established,and a reproduction system was developed,which laid the foundation for the subsequent research on multi-dimensional tactile reproduction of textiles.The reproduction system can be applied in many fields such as online clothing shopping,textile remote detection and game somatosensory interaction.