Design of monocular head-mounted displays, with a case study on fire-fighting

Abstract

Abstract:The paper presents a design methodology and a case study for monocular headmounted displays (HMDs), wherein a user can simultaneously and easily see the physical world by looking through and/or around the display. The design approach is user-focused because of the complexity of the human visual system, and because HMDs are very task, user, and context specific. A literature review of factors related to HMD design is given. This includes considerations for basic optical design, the human visual system, and head and neck biomechanics. General HMD design guidelines are given based on these considerations. For the specific case study on fire-fighting, it is recommended that the HMD be mounted at 15• to 45• below the Frankfurt plane, with a 15• to 40• field of view. A resolution of 20-60 px/deg should be focused at 1 m or farther. The neck joint torque due to the HMD should not exceed about 1 Nm. This equates to a typical maximum weight of 0.5 to 1 kg depending on the mounting location.

Mapping Brain Activity During Loss of Situation Awareness

“…Augmented cognition (AugCog) systems can, however, support perception in challenging situations such as the fireground (Wilson & Wright, 2007). Although currently a distant possibility, the real-time measurement of bias (using EEG or functional near infra-red spectroscopy -fNIRS) could provide a valuable input into an augmented cognition system to give feedback to operators concerning their information-handling bias.…”

Design of a network of robotic Lagrangian sensors for shallow water environments with case studies for multiple applications

“…A general approach to prioritizing and interrelating system components during the design process has been adapted from the Ishikawa 'cause and effect' process. 16,17 In this approach, the desired system functionality is related through a cause and effect or 'fishbone' diagram. The item in the center of the fishbone diagram is the desired outcome for the system, and the branches, or 'causes' leading up to that effect are arranged by priority.…”

Design Considerations for River Floating Sensors

“…In Figure 7, the complete diagram inspired from Ishikawa 'cause and effect' framework [9,12] shows the generic functional requirements of the drifters, while the Ishikawa diagram in Figure 8 depicts the same structure, but all the components replaced with in-depth design attributes. Figure 9 below shows the flow diagram of the AGV system where a seven channel radio system and telemetry is used to control and give live feed data to and from the floating sensor.…”