In recent years, with the continuous development of society, the living conditions of urban and rural residents has been a qualitative leap, but the phenomenon of various types of pollution is increasing. The range of modern types of pollution, the growing threat posed by the natural environment and the people's normal life, physical health. In order to maintain sustainable development and protection of people's lives and property of our society, we must take measures favorable to development of low-carbon economy, application of environmental protection and energy saving products to environmental protection. Building as the city's main carrier of culture and image projects, landscape value and commercial value of the night is also gradually being developed. Urban light pollution along quietly to the rise of this new type of pollution comes mainly from the city of vehicle lighting and architectural night lighting. At present, we have begun a study to address such pollution problems. We can reduce the harm caused by this pollution to a certain extent through the use of environmentally friendly energy-saving LED lighting in the building the night lighting control system measures. This article will LED lighting control system, night lighting in the building.
The current development of China's LED lighting
The current circumstances, subject to the enhancement of luminescence efficiency of the upstream chip prices fell and the LED lighting apparatus, a growing emphasis on the development of LED lighting in the area, and the led 1w industry is also showing a very good development trend. Experts predict that the share of the domestic lighting market, LED 2010 market share of less than five percent, but the LED lighting market share in 2011 is expected to double, reaching more than 10%, and within two years. With scientific and technological development and innovation, LED technology is more mature, its market share is at least able to reach the fifth. LED lighting in the development process, construction night lighting is undoubtedly one of the main direction of development. Whole the price of LED lighting products in the short term downward trend.
Our government as well as provincial and municipal enterprises attach great importance to the development of LED lighting, 2010, the majority of domestic enterprises invest heavily in the areas of production of LED chip, led power 10w chip price is not expensive if the daughter, but gradually reduced the price, especially in lighting applications highpowerLED price declines has reached about 15-20%. It is worth mentioning is that in the coming years, China plans to increase to more than 1200 LED devices by MOCVD. Capital investment and state support to improve the production of chips, at the same time greatly contributed to the cost of domestic LED lighting products, the decline in prices.
In addition, technological advances also contributed to the LED chip prices lower one of the reasons. According to reports, the U.S. Department of Energy set the LED point of view, the 2010 target is 140lm / W, 2020, LED luminous efficiency will reach 243lm / W.
LED lighting products and LED intelligent lighting control system
led power 50w (Light Emitting Diode Light Emitting Diode) light-emitting materials, solid semiconductor chip, and both ends of the semiconductor chip with a positive voltage, the carrier in the semiconductor compound to produce the energy to emit visible light, incandescent lighting The perfect alternative to upgrade products. It has the following characteristics: 1, safe and reliable. The semiconductor light-emitting diode, light color and soft, no glare, UV radiation generated. To save energy. The LED and light-emitting diodes within the photon reflex movement, does not produce excess heat, high energy conversion efficiency, the same brightness, power consumption is only 1/10 of an ordinary incandescent lamp, energy-saving rate up to 90%. 3, long service life. LED lamps are incandescent lamp life of 100 times, with more than 100,000 hours average life, and can work in the high frequent startup or shutdown state without damage.
led 10w architectural lighting intelligent control system, the main structure, including the sensor unit, control unit, drive circuits, lighting systems and other parts, night lighting of the city building to provide a convenient and effective to save the human and material resources, to avoid the waste of resources.
Here the author described a LED intelligent lighting and constant current drive control system.
First introduced the system hardware design, shown in Figure 1, the intelligent lighting control system based on μPD78F0034-based controller design is mainly composed by four parts of the sensor unit, controller unit, the High Power LED 50W circuit and the lighting system. the μPD78F0034 chip is that computing received by the thermal infrared sensors, light sensors, voice sensors and after A / D conversion of the initial processing of the signal data, signal processing after the D / A converter, the role of the LED driver circuit and display circuit, the help system to work properly.