Design and sharing of LED street light and traffic light control system

Abstract: Aiming at the problems existing in urban street lighting system, such as the low level of automation management, low system reliability and high energy consumption, a comprehensive street lighting energy-saving control system is proposed. The LED street light device and the traffic light control system are combined to realize the control of the light intensity of the next road segment by using the conversion of traffic lights in each section. Dividing the LED lights on the LED spotlight board on the current market into two groups, under the premise of meeting the lighting requirements of different time periods, the power can be reduced as much as possible, saving energy; at the same time, the heat production of the LED lamp can be effectively reduced, and the heat is increased. The cooling time is cooled, thereby improving the heat dissipation efficiency of the LED street lamp and greatly prolonging the service life of the LED lamp.

1 Research background

In recent years, the construction of street lamps in China has achieved rapid development, the quality of road lighting has been continuously improved, and high-intensity discharge lamps have been widely used, which have played a significant role in the construction of modern cities, but with the large energy consumption. The increase in the range, especially in recent years, has led to a significant increase in energy prices, making electricity consumption a burden. In the era of promoting green lighting all over the world, the energy saving of street lamps is bound to become a trend.

At present, China's lighting power consumption accounts for about 13% of the total electricity consumption, of which road lighting accounts for 25% to 30% of the total lighting power consumption, so road lighting energy saving has great potential and space. At present, the most used road lighting is high-pressure sodium lamps, which have the disadvantages of poor color rendering, long startup time, high power consumption, and large heat generation, and need to develop new and more energy-efficient road lighting sources. High-power high-efficiency LED is a new light source developed rapidly in recent years at home and abroad. It has high luminous efficiency (≥90lm/W (1WLED)), long life (30000~50000h), resistance to vibration, damage, instant start, no pollution. Etc. White LEDs are an ideal source for general and road lighting. Therefore, the development of LED street lights has important energy saving significance.

Considering the defects and realistic conditions of LED city street lamps at the present stage, the author proposes a comprehensive scheme of LED city street lamp control system.

2 LED city street light and traffic light control system combination plan overview

Under the premise of not changing the existing traffic light traffic system, the urban streetlight control system and the traffic light control system of each road section are integrated to achieve low-power operation of the LED streetlight during the red light period; the purpose of high-power work of the LED streetlight during the green light period .

This program is mainly designed from the following two aspects:

2.1 LED street light control system intelligent design

The LED street light device is combined with the traffic traffic light control system, and the control of the light intensity of the road segment is realized by the conversion of the traffic lights of each road section. During the red light period, the lighting demand of non-motor vehicles and pedestrians is small. During the green light period, the lighting demand of the motor vehicles is relatively large, so that the electric energy can be saved to the maximum extent when the various lighting requirements are fully satisfied.

2.2 LED integrated light board internal design

As we all know, low heat dissipation efficiency is a major bottleneck in the use of LED street lights. The internal grouping design of the LED integrated light board proposed by the author can solve this problem well. This program plans to divide the LED integrated street light board into two groups, A and B. During the red light period, the group A lamp group works separately to achieve low-power work; during the green light period, the two groups work simultaneously to achieve high-power work; in the next red light period, the group B lamp groups work separately and rotate in turn. This allows each group of lamps to have a sufficient amount of heat dissipation time and extend the life of the LED street lamps.

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