Road lighting is an important factor to ensure good road conditions. Therefore, when the street lighting project is accepted, a third-party credible testing agency is usually required to test the road illuminance and issue a corresponding test report. The purpose is to ensure whether the road illuminance of the lighting project meets "Urban Road Lighting Design Standards" CJJ 45-2006 standard requirements. "A Brief Discussion on the Illuminance Test Method of Street Lighting" written by Wu Huiming from Wenzhou Fangyuan Inspection and Certification Company mainly introduces the layout and test method of illuminance measurement for street lighting projects.
The road illuminance measuring instrument is a 0.1lx first-class illuminance meter. Considering the following characteristics of road lighting: (1) gas discharge lamps (including low-pressure sodium lamps) are mostly used, and the color range is large, so the V(λ) matching requirements of the illuminance meter are high; (2) the light emitted by long-distance lamps is It is incident on the road at a large angle, so the requirements for the cosine corrector of the photometer are high, and CIE also clearly stipulates that it can be effectively corrected up to 85°; (3) Field tests are often carried out outdoors in winter and summer, and the temperature changes greatly, so We should use a Class I lux meter that can read 0.1lx.
The center point method is adopted for the distribution method of illuminance measurement. Divide the test area between two light poles on the same side of the road into multiple grids of equal size, and the center of each grid is the measuring point of this test. The basis of this point layout method is to assume that the illuminance measured by the point as the measuring point represents the illuminance of the entire grid. For example, the road shown in Figure 1 adopts the center point method.
Conclusion: Only through the inspection of the illuminance of the completed road lighting project, the measurement of the illuminance of the road surface is completed correctly, and a test report with legal effect is issued, the project is accepted according to the test report, and all original data files are archived. To ensure the safety of driving at night on the road, and to better carry out later maintenance.
