No abstract

Smart glasses are an emerging technology designed to assist workers in a variety of industrial workplaces. In many cases, their continued development has led to a better working performance. Thus, the radiation of heat is becoming an issue that will even exacerbate, because future smart glasses require faster CPU and a larger memory. Consequently, thermal management of smart glasses is essential for user safety and comfort. In this study, the temporal evolution of the temperature on the user’s forehead was investigated during the assembly work. Two different smart glasses and a tablet were used to provide twelve participants with visual instructions. The forehead temperature was measured before and after the assembly task using a thermal camera system. The analysis revealed statistically significant differences between the two smart glasses and the tablet. The results indicate that certain types of smart glasses can lead to a temperature rise during assembly work.

No abstract

Head worn displays have become increasingly popular at workplaces in logistics and assembly lines in recent years. Such displays are expected to improve productivity and safety at the workplace. However, their impact on balance in the workforce is still an open research question. Therefore, we investigated the influence of the Vuzix M400 and Realwear HMT1 smart glasses on postural control. A laboratory study was conducted with eleven participants. Balance parameters were recorded during bilateral quiet stance, together with parameters of cognitive load. The two different smart glasses used in this study were compared with a monitor and a tablet under single-task conditions and while performing a spatial 2-back task. As balance parameters, the prediction ellipse and sample entropy in anteroposterior as well as mediolateral direction of the center-of-pressure data were examined. No significant differences were observed in the cognitive task performance between the devices. The prediction ellipse of the smart glasses was smaller than the tablets but larger than the smartboard. The dynamic of sample entropy data suggests that the use of the spatial 2-back task induces postural sway in the participants. This effect was most profound when looking at the monitor and least recognizable in the data of the tablet.