Research On The Interaction Of Vibration And Touch Perception In The Elderly

The rapid development of society is accompanied by changes in the demographic structure.In the context of an increasingly aging population,intelligent computing devices are being integrated into many aspects of the lives of older people.The rising proportion of the elderly population and the development of the information industry mean that the importance of elderly users and the importance of designing human-computer interactions for older users have also increased.For example,inputting with keyboard,clicking by mouse,voice interaction,etc.,which require people to use human-computer interaction by audio-visual,are not suitable for elderly users with reduced visual and auditory functions.Using vibrotactile feedback for interaction can reduce the visual and auditory burden of elderly users and enhance natural feeling of interaction process.In order to study the interaction effect of the elderly on vibrotactile feedback perception specifically,this paper conducts exploratory research from four aspects: different vibration intensity,different vibration types,different vibration source distributions,different wearable device positions.According to the research content,we designed and implemented a vibrotactile sensing interaction system.The older users wearing the device embedded in multiple vibration motors can receive the vibration mode information randomly transmitted by the computer,and make the tactile perception results through the graphical interactive interface.Using the system as a research tool,we collection the tactile feedback data(judgment result of vibration mode and reaction time)of the vibrotactile modes with different intensities,different vibration types,and different motor distributions that older users receive indoor and outdoor environments.According to statistical methods in human-computer interaction,we analysis these data.Through the relevant experiments and analysis of the data collected by the system,we obtained the following results:First,based on the related work of Eyes-Free interactive technology researchers,this study verified by experiments that the vibration intensity has a significant effect on the vibrotactile perception of the elderly,and the error rate and reaction time will decrease with intensity increasing.Second,based on a variety of vibration patterns,the paper compared the perception of the wearable devices of the elderly wearing on different position(wrist and ankle).It is concluded that the vibrational tactile perception effect of the wrist wearing the wristband in outside is better.Third,based on two different types of wristband vibration source distribution(the first one: one vibration source is distributed on the upper and lower sides of the wrist,and the second: two vibration sources are distributed on the upper and lower sides of the wrist)to study the perception effect of different distribution methods for the elderly.The effect of human perception is that the older people’s perception of the second distribution is better than the first one.Fourth,based on the second distribution method of the vibration source of the wristband,the difference of perception of the various vibration patterns of the elderly is studied.It is found that the vibration type(point vibration,linear vibration,circle vibration)has a significant influence on the reaction time of the elderly,and Older people are more sensitive to the type of multi-point sequential vibration.The research in this paper is a basic research on the interactive effects of vibration and tactile perception in the elderly.It has certain reference significance for designing multi-functional wearable devices suitable for the elderly in the future,such as wearable with safe travel navigation,intelligent medication reminder and guardian contact.Devices are able to use vibrational tactile feedback to achieve effective interaction with older people.