Five trends of LED intelligent lighting developmen

2022-10-14
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IOT era: five trends in the development of LED intelligent lighting

lighting has stepped from traditional lighting based on tungsten filament lamps and gas discharge lamps to lighting based on semiconductor devices, just in time to meet the era of IOT, where mobile Internet has leapt into the Internet of things. The combination of the two has produced infinite beautiful reverie and innovation, creating a promising era of IOT based intelligent lighting for lighting people

the global lighting Alliance (GLA) released the roadmap for lighting development, as shown in Figure 1:

Figure 1: the roadmap for lighting development of the global lighting Alliance (GLA)

the roadmap for lighting development (roadmap) is divided into five stages, including traditional efficient lighting, LED lighting, intelligent lighting, scalable intelligent lighting and people-oriented (HCl) lighting, which brings value and concerns to lighting. They are: energy efficiency, dynamic adjustment, IOT application and data analysis, circular economy and user friendliness. It can be seen that the development goal of lighting is people-oriented lighting, which is not only about the visual effect of lighting, but also about the non visual effect. For intelligent lighting in the IOT era, more attention is paid to the application of IOT data, upgradeable and interchangeable environment-friendly recycling, and intelligent lighting that can provide services and operations. The following is combined with the lighting development road map of gla, Analyze several development trends of the output control signal of intelligent lighting:

development trend 1: the important goal of intelligent lighting is people-oriented lighting.

the core of intelligent lighting is to provide the correct lighting for the lighting target at the right time and place, including the right illumination, the right color temperature, the right color, the right lighting duration, and the means are lighting switch, dimming, color matching, etc. When providing lighting to people, we should not only pay attention to the visual effects of lighting, but also pay more attention to the non visual effects of lighting, such as light biological safety, light regulation of human physiological rhythm, light regulation of human emotion, and actively help promote the transformation of Nanjing Chemical Industry Park to a new material industrial park, that is, we should pay more attention to human health, including comfort, physiology and emotion, This is "people-oriented lighting" HCl, which is the direction and goal of the development of intelligent lighting. Intelligent lighting should not only be our "eyes see", but also our "hearts think, feelings think". Taking building lighting as an example, more attention is paid to green buildings to healthy buildings

Figure 2: the important goal of intelligent lighting is HCl: pay attention to light vision and non visual effects

development trend 2: appropriate connection is the first step of intelligent lighting

intelligent lighting should control lighting, first of all, establish a connection between lighting equipment and control equipment. Connection is the first step towards intelligent lighting. In the era of the Internet of things and the interconnection of everything, there are many connection technologies. The following figure is an example, There are wired technology based on bus, short-distance wireless connection technology, and wide area wireless technology spanning several kilometers

Figure 3: connection technology in IOT

in the face of many connection technologies, it is necessary to select appropriate connection technologies to connect lighting, which is suitable for different application scenarios

in the application scenario of smart home lighting, we need to consider the full connection, convenient operation and safety of the overall home equipment. More importantly, we need to consider the large number of nodes and complex groups. Some nodes such as sensors and remote controllers must also support low power consumption, so ZigBee is undoubtedly the best choice at this stage. Bluetooth technology defines Bluetooth mesh technology based on controllable broadcasting, which inherits the low-power characteristics of Bluetooth and is also a connection technology worthy of attention in the future. However, if it is connected and enterprises will be more closely involved in clarifying how to use new materials to really promote economic development and even the process of spawning a new industry, there are not many nodes, or in the case of point-to-point single point simple connection, Wi Fi or Bluetooth connection can also meet the application

in the application scenario of intelligent buildings, because intelligent lighting systems generally need to be linked with building automation systems, bus based connection methods in building automation have been widely used, such as KNX, BACnet or dynet. These bus technologies can be used to control lighting, but for lighting equipment, Dali has become the only choice of lighting connection technology because of its simple, reliable, easy to install and other advantages. The wireless connection mode group is more flexible. For example, the fairhair connection technology, which is homologous with ZigBee/thread and supports IP, will become a unified connection mode in the future in the complex environment of intelligent buildings because it also has a unified general application layer compatible with a variety of building automation protocols

in urban road application scenarios, more attention is paid to the long-distance, reliability and safety of the connection. You can use Power Carrier PLC or short-distance RF for local connection, converge in the control cabinet or switch, and then use the operator's communication network for remote connection. After 2017, the development of lpwan technology, especially the vigorous development of Nb IOT technology in China, has made the connection of street lamps more convenient. NB IOT will become the first choice for road lighting connection because it uses the special frequency band licensed by the state, and the reliable network will be built by operators. Other lpwan technologies such as Lora, sigfox, UNB, zeta, etc. will become useful supplements. The improvement of 5g mmtc may unify the Jianghu connected by outdoor road lighting

landscape lighting is a very popular application scenario in China. Because landscape lighting is to use lighting to reflect the unique characteristics of each landscape or landmark, it does not emphasize the lighting function of lighting, and it is necessary to control the dynamic changes of lighting in real time to create an atmosphere. The communication protocol for lighting connection is generally DMX512/researchers say RDM, or ki net, art net, etc

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