Visual performance for trip hazard detection when using incandescent and led miner cap lamps

Sammarco, John J.; Gallagher, Sean; Reyes, Miguel

doi:10.1016/j.jsr.2010.02.007

Cited by 9 publications

(9 citation statements)

References 8 publications

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“…The research results imply that age is a significant factor in visual performance among the different age groups, as was shown in prior NIOSH research [1], [2], [3]. Also, there was a large difference in visual performance between the two age groups, thus highlighting the importance of considering this factor given an aging workforce.…”

Section: Discussionsupporting

confidence: 72%

“…While gender was not a variable in this study, the gender percentage distribution was representative of the U.S. miner population. Two age categories were established given that age is a factor for visual performance in general and as established by prior mine illumination research [1], [2], [3], [4]. The younger age group was from 40 to 50 years of age.…”

Section: Subjectsmentioning

confidence: 99%

“…Recent NIOSH research has focused on the spectral characteristics of light from miner cap lamps to improve safety. The results indicate significant gains in visual performance that could reduce pinning/striking accidents [1], glare-induced accidents [2] and slip/trip/fall (STF) accidents [3]. NIOSH researchers also conducted an empirical study of visual performance for detection of trip hazards and peripheral motion detection given various types of machine mounted area lighting.…”

Section: Introductionmentioning

confidence: 99%

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Comparative evaluation of Light Emitting Diode cap lamps with an emphasis on visual performance in mesopic lighting conditions

Reyes

Sammarco

Gallagher

et al. 2011

2011 IEEE Industry Applications Society Annual Meeting

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Conducted at the Office of Mine Safety and Health Research laboratory of the National Institute for Occupational Safety and Health (NIOSH), this experiment is part of ongoing mine illumination research designed to explore the benefits of solid state lighting technologies when applied to the underground mining industry. This experiment involves the comparative evaluation of cap lamps with similar spectral power distributions, focusing on the electrical and battery discharge characteristics, with a secondary objective being exploring the benefits gained through alternative light beam distributions. NIOSH researchers conducted the investigation by comparing three commercially available LED cap lamps and a NIOSH prototype cap lamp at varying power settings. Visual performance for the detection of hazards was quantified by recording times of detection for finding rotating targets in the peripheral field of view and objects representing trip and fall hazards on the ground. Results show that the NIOSH prototype improved the ability to perceive objects in the visual field by improving peripheral motion detection times by as much as 79.5%, and ground hazard detection times by as much as 194.1%.

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Section: Discussionsupporting

confidence: 72%

Section: Subjectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative evaluation of Light Emitting Diode cap lamps with an emphasis on visual performance in mesopic lighting conditions

Reyes

Sammarco

Gallagher

et al. 2011

2011 IEEE Industry Applications Society Annual Meeting

Self Cite

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“…The Phase I results of enhancing the color of light to improve visual performance indicated significant improvements for people 50 or more years old. Peripheral motion detection im proved by 15%, floor trip hazard detection improved by 23.7%, discomfort glare was reduced by 45%, and disability glare was reduced by 53.8% [Sammarco et al 2010]. The Phase II results indicated a 94% faster detection rate of trip hazards and a 79% faster detection rate of peripheral motion, with no increase in glare [Reyes et al 2011].…”

Section: Reported Findingsmentioning

confidence: 99%

Technology News 556 - the NIOSH LED cap lamp provides improved illumination for greater safety in underground mines.

2017

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Figure 1: (Left) Illumination provided by an LED cap lamp in an underground mine. (Right) The improved illumination provided by the NIOSH-developed LED cap lamp. Photos by NIOSH Summary Researchers at the National Institute for Occupational Safety and Health (NIOSH) have developed an LED cap lamp that signifi cantly improves illumination in underground mines, thereby enhancing safety by reducing injuries to miners. Providing better illumination underground improves a miner's ability to see and avoid poten tial hazards in the mine (see Figure 1). Results from NIOSH's scientifi c testing confi rm that the NIOSH LED cap lamp demonstrates major improvements in trip hazard detection, peripheral motion detection of moving hazards, and reduced glare when compared to existing LED cap lamps. The NIOSH LED cap lamp design is now freely available for commercialization by cap lamp manufacturers.

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“…Different arrows for visual glare caused different feelings. However, LED‐related studies have asserted that because LED lights feature high directivity, when high luminance LED lights are used, designers must pay special attention to the problem of discomfort glare . Some studies have noted the importance of luminance in participants' ability to read information in which a favorable display brightness–background luminance ratio can effectively reduce glare .…”

Section: Introductionmentioning

confidence: 99%

Assessment of drivers' visual perception of information displayed in LED traffic signs at road construction sites

Liou

2017

J Soc Info Display

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-This study investigated drivers' visual perception of information displayed in LED traffic signs under different levels of environmental luminance. Concerning the information displayed, the environmental luminance comprised four luminance contrasts, two arrow types, and three environmental luminances, which were used to identify the visibility of traffic signs at the reading distance. Regarding visible distance, visibility involved reading starting and end points, extent of glare, comfortable distance, and glare distance. According to the study results obtained by using a highly reliable glare assessment method and studying the LED traffic signs, the lower the luminance contrast of traffic signs was the higher glare the participants perceived. A luminance contrast of 6200:2066 cd/m 2 provided the farthest comfortable and glare distances, enabling drivers to notice the signs comparatively earlier and have sufficient time to react accordingly. Overall, arrow type "<<<" outperformed "←" because the former was easier for drivers to read and created less glare. Regarding environmental luminance, traffic signs displayed in high and medium luminance environments (i.e., extremely sunny and cloudy days, respectively) each featured their own advantage, whereas those displayed in low luminance environments (nights) have to be further improved.

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Visual performance for trip hazard detection when using incandescent and led miner cap lamps

Cited by 9 publications

References 8 publications

Comparative evaluation of Light Emitting Diode cap lamps with an emphasis on visual performance in mesopic lighting conditions

Comparative evaluation of Light Emitting Diode cap lamps with an emphasis on visual performance in mesopic lighting conditions

Technology News 556 - the NIOSH LED cap lamp provides improved illumination for greater safety in underground mines.

Assessment of drivers' visual perception of information displayed in LED traffic signs at road construction sites

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