Intelligent Urban Road Lighting_Design of Wireless Street Light Control System

With the development of the times, the pace of urban modernization construction is accelerating, and the demand for urban road lighting and urban lighting projects is also greater, and the contradiction between supply and demand of energy is becoming more and more prominent. Energy-saving and energy-saving, green lighting requirements are becoming more and more urgent. ,Higher and higher. Nowadays, with the traditional manual control, the method of clock-controlled urban lighting system can no longer meet the requirements. The streetlight wireless control system is in demand. Urban road lighting automation control and intelligent management are one of the symbols of urban modernization. The economic and social benefits it brings are very significant. Its promotion and implementation will also be municipal engineering. An important part of the construction. This article introduces the design of a wireless street light control system.

In the wireless LED street light remote control system, the hardware is mainly composed of the terminal control node, the monitoring system of the street lamp control center, and the routing node that plays the role of the terminal control node and the control center. The system is constructed as shown in the figure below.

The monitoring center of the control center is mainly composed of two modules: PC module and wireless transceiver module. Its function is to construct and manage the streetlight control network and timely reflect the status and information of the street lamp. At the same time, the grain sends control commands according to the situation. To coordinate the normal operation of some street lighting systems. Street lamp terminal point package 掂LED power supply driver provides power for high-power LED and can control LED working condition according to MCU control signal. Photosensitive sensor and temperature sensor directly transmit LED working condition to control module power detection module to detect LED power condition and power supply failure And up, the alarm wireless module is responsible for transmitting data. The node frame diagram is shown below.

The front-end node subnet is an important part of the wireless LED streetlight remote control system. Its body. The terminal control node is the terminal book point (RFD) in the WSN, and the control center monitoring system is the coordinator (COORD). The wireless fast message between the COORD and the RFD is designed to adopt a star network for the routing and forwarding node (ROUTER). There is only one coordinator in a network. Responsible for establishing networks and managing networks. Display status information and send control commands. The terminal node in the network is a street light control terminal. The model corresponding to the WSN is RFD, and the street light terminal node is disposed on the street light pole. It is equipped with a controller and wireless module that controls the street light + the real-time status of receiving control commands and transmitting street lights. The road d1 forwarding node in the network, the corresponding model in the WSN is ROOTER, and the bar is also placed on the street light pole to control the street light. Unlike the rock node, it is also responsible for processing the data of the routing and forwarding terminal node. Its hardware structure is less different from the terminal node.

In order to achieve remote control of the street lamp system, the remote monitoring network in the system uses a hybrid network, namely Zigbee+GRPS network. Since the standard transmission distance of the Zighee wireless network is only 75m, even if the extended antenna is used, only 200m is difficult to achieve the WSN covering the entire city.

If the implementation is implemented by means of relay routing, the cost is too high, the reliability of the network is too large, and it is not conducive to control. Therefore, the urban streetlight networking is subdivided. Each subnet contains several hundred street lights. The subnet uses the WSN control streetlight established by Zighee. The maximum route between the terminal and the coordinator jumps 2~3 times to ensure reliable network. Sex. The subnet and central control center use the GPRS network to transmit data. The network structure is shown in the figure below.

The economic benefits of the streetlight control system developed on the basis of Zighee technology and LED technology are very obvious. Achieving a high degree of automation and efficient book energy. On the one hand, LED light source is a new type of high-efficiency, environmentally friendly, safe and durable. Light source, on the other hand, wireless control technology can provide scientific and efficient control and resource integration for street lighting system. Reasonable lighting time can not only save electricity consumption of lighting tether, but also extend the service life of lighting and reduce the expenses of daily maintenance. . It is worth noting that the wireless control network should have high reliability. When a routing node fails, it should be able to enable the effective use of the routing link support coordinator to effectively control the terminal node. The failure rate of the street lamp should be 5%.

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