| ID (ISN) del documento | 52962 |
| Número CIS |
89-2085 |
| ISSN - Título de la serie |
0829-0369 - Travail et santé |
| Año |
1989 |
| Número de serie |
|
| Autor(es) |
Desnoyers L., Dumont D. |
| Título |
Cap lamps and visibility in mines: an exploratory study |
| Título original |
Lampes de chapeau et visibilité dans les mines: une étude exploratoire [en francés] |
| Información bibliográfica |
Fall 1989, Vol.5, No.3, p.S19-S23. 7 ref. |
| Resumen |
Three lamp models were tested. Illumination levels, measured 2 meters in front of the lamps, varied from 380 to 2500 lux when the lamps were adjusted for narrow beam lighting (approximately 5° of arc). Adjusting the lamps for wide beam lighting reduced centre-field illumination by 80 to 90% while increasing levels in the immediate periphery. At the end of the 7 hour shifts, illumination levels produced by new lamps were reduced by 45 to 60%. Used lamps were still in service which gave off only 2/3 to 1/4 of the illumination produced by new lamps. Rockface reflectance averages only 9 to 22% and therefore miners use their lamps set for narrow beam illumination, in order to obtain high enough luminances. However, this also produces luminance ratios as high as 350:1 between the center of the visual field and its immediate periphery. This value is 100 times more than the maximum level recommended to avoid glare. |
| Descriptores (primarios) |
explotación minera en el fondo; valoración de la visibilidad; lámparas de casco |
| Descriptores (secundarios) |
iluminación |
| Tipo de documento |
D - Artículos periódicos |
| Tema(s) |
Minas y canteras
|
| Broad subject area(s) |
Fisiología, ergonomía
|
| Navegación por categoria(s) |
Lighting and colour
|
