International standards for LED street lamps

I have already introduced a lot of things about LEDs on the LED street lamp website. I hope you can learn more about LEDs, the ultimate goal is to hope that everyone can identify led street lamps or that people in this line can produce high-quality LED street lamps, but any line of work is inseparable from relevant industry standards. In the LED street lamp industry, China is based on the existing actual road traffic conditions, with reference to international road design standards, in which various indicators are designed. The specific introduction is as follows:
The International Standards mentioned here mainly include road lighting suggestions for Motor Vehicles and pedestrian traffic and road lighting. The issue of illuminance and light intensity has been mentioned in previous articles, but the environmental ratio of motor vehicles to roads is rarely mentioned. In the test method, calculate the ratio of the average brightness of the Area 5 m in the roadside width to the average brightness of the Area 5 m in the road width. The environment is more important than the Sr value. If this value is reasonable, the driver will be able to clearly know the information around the road under the illumination of LED street lights, and will not suddenly appear because of passers-, the driver was too late to respond to a traffic accident. There is also an important glare threshold increment Ti (%), which needs to be calculated by formula derivation combined with field measurement, which is not available to non-professionals. In addition, the calculating of the glare threshold of street lights in different locations is different. The purpose of the Road Standard is to ensure traffic safety. When there is a glare source, light scattering forms a Light Curtain, which is superimposed on the retina, seriously affecting vehicle safety. This is also mentioned in the article earlier in the editor. To obtain the standard threshold increment, You must select an observation point reasonably. In addition, there are no uniform measurement points for the increase of street lamp threshold values in different locations. There are two average brightness values-u in the international standard. And ul, led street lights in the vertical direction that is the direction of the lane must have a certain light cast ability, in the horizontal direction has a certain light cast ability. Total brightness uniformity (u .) The ratio of the minimum brightness to the average brightness is called the total brightness uniformity. The total brightness uniformity of the road surface is U.> 0.4. Fill: when the environment is compared with the Sr value, if the road is less than 10 m, the measurement road width is half of the road width.
In addition to feeling the realization of the road around the road, the driver is more important to look at the road surface, which involves another problem in the standard test road brightness. Road brightness and light source and road surface material Reflection characteristics. Different pavement materials have different reflectivity. At present, pavement materials in China often include dense asphalt concrete and drainage pavement, and the reflectivity can be learned only through actual measurement. The road lighting design standards vary according to different evaluation standards of road surface reflection materials. In the process of road lighting design, the street lighting distribution and the reflection coefficient of pavement materials must be combined to achieve accurate road lighting design.
All the values in the above-mentioned international standards for LED street lamps that do not meet the standard requirements, such as brightness and environment ratio Sr, will increase the probability of a traffic accident. Only scientific and professional data measurement and practical experience can we design excellent light distribution design and lamp pole configuration to provide a qualified and efficient urban lighting environment. Www.denggan123.com