道路照明设计（Road lighting design）.docVIP

道路照明设计（Road lighting design） Road lighting design usually consists of two parts, one for road lighting design, and the other is the electrical design of road lighting. In road lighting design should understand and collect relevant information: (1) to determine the standard of road lighting and other special requirements; (2) collecting road layout, road section structure, underground pipeline data, based on the full understanding of these data, in order to lighting design; (3 understand the road) and surrounding environment of city construction and the overall planning scheme; (4) collecting data to determine the power supply, power supply and line position etc.. Design of illumination for road lighting (I) light source The light source of road lighting should be determined according to the light source efficiency, luminous flux, life, light color, control light distribution, degree of difficulty and road condition. In our country, there are four kinds of light sources which are suitable for road lighting at present. They are high pressure sodium lamp, high pressure mercury lamp, metal halide lamp and low pressure sodium lamp: High pressure fluorescent lamp is produced by high pressure mercury discharge when the visible light, its high efficiency, long service life, the average of up to 12000 hours, but the color is generally applicable to the road, lane, residential or other large area lighting, or in combination with high pressure sodium lamp as light mixing illumination. High pressure sodium lamp is characterized by: light efficiency of up to 70-100LM/W, long service life, average up to 12000 hours; fog good. Is a high-strength gas discharge lamp in high efficient light source, because the lamp by oxidation of aluminum, and the mercury lamp has the characteristics of small decline compared to the. Although the color temperature of low voltage sodium lamp is low and its color rendering is poor, it is economical for road lighting and square lighting. Metal halide l