He Kaijun: about ten city million project implementation of N related issues

Scientific development can be

On the N related issues of "ten cities" project

The development of semiconductor lighting technology and industry is much faster than expected, some characteristics of the LED light source is any artificial light incomparable, such as rich color, high color saturation, light concentration, solid luminescence, fast response speed, brightness and color can be digital, intelligent and networked control and regulation etc.. Wide application of these new features will change the traditional lighting experience and habits, LED lighting concept and light the change of culture, to promote the lighting products to people-oriented and more humane direction, the Ministry of science and Technology launched the "ten city lights" semiconductor lighting demonstration project will bring LED to the broader market, to promote the LED industry do strong.

Lighting is a comprehensive engineering technology involving a variety of disciplines and technologies, human visual characteristics and visual cognition determines the quantity and quality of lighting needs, not only to consider the semiconductor technology and other areas of science and technology integration and innovation, but also consider and pay attention to aesthetics, art, philosophy, ergonomics, physiology and psychology and other fields of science, integrated to meet the growing demand for the pursuit of quality of life. The current situation is not an authority, a university, a research institution or an enterprise can fully understand the connotation of lighting technology and lighting is one of the more should be people-oriented, carry out technological innovation, Scientific Outlook on Development integrated science and technology field, from the scientific development perspective, we only list some controversial, study the concept of fuzzy and need, for your study.

Urban road lighting is the "Ten City 10000 light" the main application direction?

High pressure sodium lamp in the course of development of city road lighting for more than thirty years has been mature and efficient light source, improved with high color high pressure sodium lamp, LED and PHILIPS low temperature ceramic metal halide lamp and electrodeless lamp etc. in addition to the new light. Show that most professionals view and test: LED in luminous efficiency, stability, reliability, heat resistance, color temperature, light distribution, maintainability, etc. as the price above the current overall level of light source, LED lamp lighting is not up to the main road of "city road lighting design standards". A major problem with the LED street reconstruction main road or branch are: one is the poor stability, maintenance and replacement of high frequency; two is the total luminous flux is insufficient, not up to the requirements of "city road lighting design standards"; the three is a reflection of the people, especially in rural areas, farmers or reflect, they say the city lights change a crop of crop and the change from light does not shine, we can hold on street like what time.

According to the current technical level of LED lamp, mainly used for road, 8 meters below the road, pedestrian road, residential road, for rural urbanization, the outskirts of the city of new roads, solar photovoltaic or wind and solar power and LED combination of street lighting system, so with taxpayers' money to do things and social harmony. With low energy consumption.

LED road lighting indicators or evaluation of the use of brightness index evaluation?

Now the annual LED road lighting paper or presentation of thousands, frequent meetings, many of whom are known experts or too busy to attend to all, big enterprise chief engineer, they on the driver's visual characteristics of human visual function and visual information is poorly understood, most of the speech or with surface illumination, average illuminance, illumination lighting design of pavement evenness index evaluation of LED street or LED Road, while the developed countries since 80s began using the "Brightness", China Construction Science Research Institute researcher Li Tienan in his book "city road lighting design" and many speech stressed that "according to the visual operation to choose lighting standards"; "the evaluation index of road lighting (including the two aspects of visual function and comfort): the road average brightness, surface brightness uniformity and brightness of the longitudinal road total Uniformity, disability glare (threshold increment), and induced the environment than ", these indicators have been included in the" city road lighting design standards CJJ45-2006 ", its purpose is to provide lighting as much as possible the bright road, in a relatively bright background, visible object silhouette or from high reflection object reflection light, only in some special cases, can not use the brightness index to evaluate the illuminance of road lighting. Tongji University of architecture and City Planning Institute, Zou Jiping Li Li, in the "relationship between brightness and illuminance in road and tunnel lighting" (lighting engineering 082009) in this paper, the domestic and foreign tunnel lamp test comparison, the same illuminance, brightness and imported tunnel lights than domestic lamp 80%. We engage in some "expert ten city lights" is not clear, the luminance and luminous intensity, luminous flux in the concept of what is the objective, which is the subjective quantity and human related; 90% professional publications will be defined as the luminous intensity quantity luminous light source unit solid angle in a given direction emission; the brightness and illuminance with a simple proportional conversion, even mistakenly believe that the brightness illumination in the standard is also used in road illumination intensity uniformity characterization of LED lamp. These unscientific problems are also one of the reasons leading to the immaturity of our LED street lamp, the scientific development of LED street lamp is a long way to go, there is a long way to go, can not be quick success.

Do you want to correct the visual spectral luminous efficiency function for road lighting?

Because of the sensitivity of human vertebral body cells and rod cells to different brightness and spectrum