Vibrotactile Perception On The Head And Industrial Design Of Head-mounted Device Based On Early Warning Situation

In the man-machine-environment interaction system,with the increasing complexity of interaction objects and interactive scenarios,the traditional ways of visual and auditory information communication are difficult to meet people’s needs for transmission efficacy and speed under the construction emergency scenarios.While tactile interaction has unique advantages,which has been found to be able to compensate for impaired visual and audio channels,and its importance in information transmission is increasingly prominent.However,relevant research and the application of tactile sensation in the building construction early warning scenarios are still at an early stage.Therefore,this research aims to conduct experiments about the tactile perception and cognition based on the prototype of the vibrotactile head-mounted devices,and exploring ideal forms of head-mounted vibrotactile devices to provide guidelines for industrial design of safety helmets to be used in building construction sites.Firstly,this thesis explained the concept of tactile and its perceptional process,and summarized the existing vibrotactile technologies,and then outlined current research status and progress of vibrotactile devices for information transmission.Based on the research methods of tactile perception and cognitive psychology,this thesis presented a research framework for tactile perception research and design of tactile early warning equipment under building construction scenarios.Subsequently,experiments in this research were conducted focused on the spatial locations,temporal patterns and parameters of vibrotactile stimuli,and a vibrotactile early warning system was proposed to study the various characteristics of vibration.In the first experiment,measurements of tactile perception were conducted to assess the sensitivity of different positions on the head to identify suitable vibration positions.In the second experiment,seven vibrotactile patterns composed of different temporal patterns and intensities were compared to identify suitable warning patterns.Results showed that the hairless region around the forehead and the center of the temporal regions have higher sensitivity,and those vibrotactile patterns with short intervals and high intensity are more suitable for transmitting warning information.These results from perceptual experiments provided evidence for placing vibration modules and determining parameters of vibrotactile stimuli,which can be applied to the design of head-mounted devices based on a specific situation.Based on the experimental conclusion and the survey of emergency early warning scenes under the construction sites,an engineering safety warning helmet had been designed.The intelligent early warning helmet is aimed to provide warning signals under two typical emergency scenarios in construction environment.This product is based on the BIM（Building information modeling）building information positioning and early warning system to realize functional components interaction.Finally,this vibrotactile warning helmet was tested and evaluated by real construction workers.