LED street lamp and tunnel lamp technology development and application situation
In 2016, the technology and application of LED street lights and tunnel lights entered a new stage, from the National Development and Reform Commission’s support for the road and tunnel lighting application energy efficiency lighting evaluation system project to the beginning of the provincial and municipal governments to actively support the use of LED street lights and tunnel lights to enter the city Lighting, its application has been positively affirmed.
At present, there are no fundamental technical obstacles to the application of LED street lamps and tunnel lamps in urban road lighting. If LED street lamp manufacturers can follow the corresponding aspects from chip links and packaging methods to optical design of lamps and other key application technologies The national standard design and production can ensure that it meets the requirements of the "Code for Design of Ventilation and Lighting of Highway Tunnels" and "Design Standards of Urban Road Lighting", that is, LED street lights and tunnel lights can meet the requirements of urban road lighting in terms of standards, production technology and applications. The application, and has a considerable energy-saving effect.
The newly revised "Code for Design of Ventilation and Lighting of Highway Tunnels" has been improved from the following aspects: First, based on energy saving and intermediate vision, the ground brightness and wall brightness indicators are appropriately reduced to ensure further energy saving of tunnel lighting; For transitional lighting, use lighting indicators with a smoother gradient to make the black hole and white hole effects smaller; third, from the perspective of energy saving, it is clear that LED lamps can be used for tunnel lighting, and the optical performance is specified; It is a clear indicator of the dimming strategy that is treated separately during the day and night based on traffic flow and vehicle speed, which provides a basis for tunnel operation dimming.
The new revised standards of "Urban Road Lighting Design Standards" have made breakthroughs in the following aspects: First, the road lighting evaluation indicators are average brightness, brightness uniformity (total uniformity and longitudinal uniformity), glare, environmental ratio, inducibility, etc. Five indicators are indispensable; the second is uniformity and glare, and the environment ratio is very important for the display (recognition) of obstacles on the road; the third is from the perspective of energy saving, it is clear that LED lamps are feasible for tunnel lighting, and Provisions are made for important optical indicators, such as the color rendering index that affects the recognition ability, the color tolerance that affects the consistency of light and color, the color temperature index that affects the comfort, and so on; the fourth is the selection and optimization of multiple design plans, and scientific bidding technology Requirement formulation and strict implementation are of great significance to ensuring the quality of lighting projects. Regarding LED lighting application interface requirements: non-integrated LED module street lamps, confused users for many years of interchangeable product standards for street lamps, the standardization module standard submission draft has been reviewed and passed, the formulation of the standard can provide large-scale application of LED street lamps了Support.
Relying on the current status of LED street lights in Taiwan, China and tracking test results data, it is concluded that LED street lights are currently very mature and suitable for road lighting applications. For the current intelligent control methods and architectures commonly used in roads and tunnels, the characteristics and core technology of the time-controlled dimming power supply for LED street lights, the LED street lights and their poles have the advantages of convenient location and power supply, and LED products can be equipped with intelligent control. , Proposed such as multi-functional light pole system for city image publicity, such as display screen and mobile phone APP software to release public information and advertising information, public safety improvement and disaster prevention and mitigation projects, such as street lamp status judgment on roads, street lamp cable theft alarm , Monitoring the safety status of electromechanical and civil construction facilities on roads such as manhole covers and pipelines, environmental pollution monitoring, natural disaster monitoring, etc., public services for people’s livelihood projects, such as traffic flow monitoring and congestion control, high-speed Internet access to outdoor wifi hotspots, charging piles The promotion of LED street lights such as parking navigation, shopping guides in business districts, etc. will play a huge role. At present, the standard for intelligent control of street lights is for the detection of product hardware, system function completeness and reliability of the detection means control and other methods, and emphasizes that the control functions and requirements will be more based on the characteristics of LED light sources, and the characteristics of smart city construction have reserved interfaces. , The intelligent control system based on LED street lights can realize automatic inspection to greatly reduce labor intensity and improve work efficiency. Dimming technology based on indicators such as traffic flow and the principle of secondary energy-saving wireless intelligent control system, through practical application and testing, The reliability guarantee method of intelligent control hardware and the guarantee method of communication application reliability are proposed.
At present, the difficulties in the application of LED street lights are to pay attention to the application of LED street lights in terms of lighting design methods, product quality control, bidding technical indicators determination, product failure and light decay tracking, and other aspects. In addition, there is uncertainty in EMC project management. , The installation and construction of street light products, experts believe that: at present, in actual operation, LED street lights still have some restrictive factors such as uneven product technical quality at this stage, which affect the application of LED street lights. With the rapid development of LED street light products, increasingly comfortable light colors, and reasonable prices, the application of LED street lights will be actively promoted. Experts believe that the entry of LED street lights and tunnel lights into outdoor lighting will be an important measure for urban lighting energy saving and an important implementation method for smart cities. It is recommended that local user departments develop a more scientific, practical and effective bidding Mechanisms and methods to fully guarantee product quality, lighting effects, energy-saving ratios, etc. in practical applications, prevent malicious low prices, reduce the damage to the interests of users and manufacturers, and create a safe, energy-saving, and comfortable light environment. Government departments can give encouragement and policies in various ways in the application of LED street lights and tunnel lights to promote the development of energy-saving urban lighting.
