Assessment of the perception of visual warning signals generated with an augmented reality system in order to optimize them

"The aim of this research task was to assess human perception of AR signals from the point of view of the possibilities of using that technique to generate warning signals at workstations with machines.On the basis of the conducted analyses basic requirements related to AR warning signals were formed. Moreover, 6 systems generating warning signals were selected.- AR1 - a system developed at the Warsaw University of Technology in co-operation with CIOP-PIB; it has commonly used protective spectacles, on which a signal in the form of a red spot is generated.- AR2 - spectacles as in AR1, but with a signal flashing with a frequency of 4 Hz.- AR 3 - the most common available on the market system of type LITEYE-500 AR spectacles with the warning signal in the form of an alphanumeric STOP signal.- AR4 - spectacles as in AR1, but with a signal in the form of a yellow spot.- AR5 - spectacles as in AR1, but with a signal flashing with a frequency of 8 Hz.- AR2 - spectacles as in AR1, but with a signal in the form of a red triangle.Methods of assessing the perception of warning signals around the world were analysed and research hypotheses were formed. That was the basis for developing a method of assessing perception of warning signals.Recommendations related to the use of AR techniques to generate warning signals for operators of machines were established. Augmented reality systems should be used primarily as an addition to traditional warning systems. AR devices can be successfully used for warning against such possibly hazardous events as switching on a machine or excessive speed."