ZigBee intelligent control system design applied to LED street light control

Street lamps are indispensable lighting tools for residents' daily life. With the rapid development of economy and urbanization, people have improved and optimized the system of street lamps. The traditional street lighting system is generally a wired connection, and the system construction cost is high, the lines are unclear, the movement is not easy to expand, and the degree of intelligence is not high. In order to improve the inconvenience of traditional street lamps, people combine the new technology with the street lamp system and use wireless instead of wired control to make the street lights smarter and more convenient. ZigBee technology is a new type of wireless communication technology, which is mainly used for information transmission in short distances. It has many advantages. Combining this technology with street lighting system is a favorable innovation. In addition, in order to respond to the needs of modern sustainable development, we consider LED street lights for lighting from the perspective of energy saving and emission reduction. This ZigBee-based streetlight intelligent control system has the advantages of stability, safety, convenience and efficiency.

1, ZigBee networking technology

ZigBee technology's data transmission has lower power consumption, lower technology cost, simple structure but large capacity. The topology of the network is divided into two types: mesh topology and tree topology. The commonly used tree topology is the structure. The entire network mainly includes three types of devices, which are divided into network coordinator, full-featured device (FFD) and reduced function device (RFD).

2, street light control system composition

The intelligent control system components of street lamps have the following three points:

(1) Microprocessor control system. It consists of a routing node and a leaf node. The main structural components include a street light dimming controller, a DC power system, a communication control system, and a light intensity sensor;

(2) Server monitoring system of the control center. Composed of a coordinator and a PC;

(3) Intelligent control system. It is used to implement the ZigBee wireless network that controls the operation of the entire system.

The control system structure of the microprocessor is generally a multi-channel tree network topology. The monitoring system of the control center, several routing nodes and several RFD nodes constitute the network coordinator of the whole system. In each part, the routing node is placed next to the road in a string connection, after which the router is remotely controlled as a relay controller. At the same time, it also has the function of controlling the LED lights as a separate user node. The RFD user node does not have the function of a routing node and cannot be used as a repeater. It can only receive signals and control its own LEDs according to the received signals.

3, system software design

The design of the system software mainly includes four parts, namely PC server background software design, coordinator software design, router software design and leaf node software design.

3.1 PC server background software design

When the PC controls the entire system, the command is sent to the coordinator via the serial port, and then the control is completed through the man-machine interface. In operation, the main function of the PC server is to send a control command to the coordinator. This command will direct the coordination action to control. The coordinator reads the data information obtained by the ZigBee network and returns the data to the PC server. The PC opportunity saves the operational data in the work and the parameters of the system.

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Taishan Jie Da Electrical Co., Ltd , https://www.ts-jieda.com

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