The rapid spread of IT technologies such as the Internet of Things, cloud computing, and big data is making lighting more and more intelligent.
“When every light on the ceiling has an IP address, the light has precise positioning and navigation capabilities, and its accuracy can reach centimeters, far exceeding the WIFI and Bluetooth positioning systems we currently use. For example, In Shanghai, People’s Square has 19 subway exits, and Xujiahui has 20 subway exits. People who come out often are dizzy and can’t figure out the direction. If the lights installed on the ceiling can navigate out a correct access direction, the convenience is certain. Everyone needs it.†On August 17, Wang Wei, president of Philips Lighting Greater China, said in an interview with Beijing that the international electronics giant represented by Philips has realized the application of this technology and became a human being. Another breakthrough in the use and use of light. Now, Philips is preparing to launch an LED with Internet access, navigation and positioning in China.
Lighting system: use electronic signal to drive voltage to detonate intelligent lighting
"In our traditional concept, the lamp must be connected by wires, but the current lamp can be connected with a network cable. This is the Power over Ethernet (PoE) technology we are applying to LED luminaires, the core of this technology. It is to ensure the safety of existing structured wiring while ensuring the normal operation of the existing network while power supply, and to minimize the cost." Yao Mengming, general manager of lighting design and application department of Philips Lighting China, said.
It's easy to work with sensors, wireless communication modules, and embedded processors. This feature allows LED luminaires to become intelligent network sensor concentrators, and with an isolated local embedded processor, the lighting system can save energy. Connect smart LED lights/sensor concentrators to a local area network (LAN), allowing installed LED concentrators to quickly support and take advantage of new features emerging on the IoT (Internet of Things) to provide adaptation without the need to replace expensive lights Technology for future development.
“PoE is ideal for powering, connecting, and controlling smart LED concentrators over a LAN, which reduces the cost of deploying and installing compatible IP devices, including LED lights and sensor concentrators. Since only one data cable needs to be routed, cabling costs are lower Low, and no separate power cable is required.†Yao Mengming stressed.
In the PoE configuration, each LED luminaire can be a standard RJ45 connector plug-and-play device with its own IP address and can be independently addressed. A smart LED concentrator (integrated sensor and wireless access point) is connected via PoE to power each LED concentrator that is illuminated. The PoE connection also supports each LED concentrator to collect information from various sensors and send the data back to the controller, which may include ambient light, temperature, humidity, and anonymous room usage data. For example, an inductive sensor can be used to ensure that the light is turned on only when someone enters the room, and that the light is automatically turned off when the sensor does not detect anyone. Alternatively, ambient light sensors support daylight harvesting, and LED lighting is automatically adjusted when daylight is insufficient to maintain illumination.
Through PoE operation, the LED lighting system becomes an information network where users can control the lighting and temperature in their vicinity. The system has access to other building services, such as proximity detection sensors, to discover the nearest free meeting room.
Cisco Systems, Inc. previously applied the technology to its products. According to this, Wang Hao, president of Philips Lighting Greater China, believes that PoELED network can provide additional benefits for future development, because LED lighting (and integrated smart sensor concentrator) has been deployed in people's gathering place, PoE is the future of LED lighting. . This also opens up the imagination of human beings.
Yao Mengming told reporters that the application of optical communication positioning technology is another important link in the current intelligent lighting system.
Compared with the currently used wireless local area network (wireless LAN), the visible light communication system can use indoor lighting equipment instead of the wireless LAN local area network base station to transmit signals, and its communication speed can reach tens of megabits to hundreds of megabits per second, and the future transmission speed may exceed Optical Fiber Communication. With a dedicated computer that can transmit and receive signals and a mobile information terminal, you can download and upload high-resolution images and animations for a long time as long as the indoor lights are illuminated.
"Radio signal transmission equipment has many limitations. They are rare, expensive, and inefficient. For example, mobile phones, millions of base stations around the world help them to enhance their signals, but most of the energy is consumed by cooling, and the efficiency is only 5%. In contrast, the bulbs used in the world are inexhaustible, especially in the domestic LED light source is replacing the traditional incandescent lamp on a large scale. Just add a microchip to any inconspicuous LED bulb to turn the bulb into a wireless network. "The transmitter." Yao Mengming said, "Without the WiFi signal, you can access the Internet with a single LED light. This has become a reality now and will become more popular in the future.
Based on the visible light communication technology, Philips Lighting pioneered the development of an optical communication indoor navigation and positioning system. "Based on the network IP address and indoor physical address of the PoE luminaire, the strobe of the visible light of the LED, the visible light communication between the mobile phone camera and the LED light, and the APP, we realized the use of the light for indoor positioning, and the accuracy can reach centimeters." Yao Meng Ming said, as I said before, if we use lights to navigate the subway exits for people, that is the technology is working.
In this regard, many experts including Zhao Jianping, deputy dean of the Chinese Academy of Building Research, told reporters that the current outdoor GPS Beidou navigation and positioning technology is very mature. However, more than 80% of the time people are indoors, the demand for indoor positioning is exponentially increasing, and the accuracy requirements will be higher. With the gradual maturity of optical communication positioning technology and the widespread application of mobile Internet, the indoor positioning market is already in the early stage of the outbreak. The optical positioning technology of optical communication will be infinitely magnified.
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