Beijing Changping District Urban Night Lighting Project

I. Overview:

The Beijing Changping District Night Scene Project is one of the contents of the “Planning Plan for the Urban and Rural Environmental Renovation Plan for the 2006-2008 Olympic Games in Changping District”, which was approved by the government at the end of 2005. The Beijing night lighting project in Changping District is a renovation project of the old city. There are difficulties in controlling control points, long distances, difficult wiring and short construction period. The project includes 22 building floodlights, 11 road lighting, 4 parks and plazas, and 42 signal receiving points at 5 locations around the island and green space. All projects are controlled using an intelligent control system. The night lighting project includes the first and second phases of the project. The first phase of the project was completed in November 2006. The project consists of 6 buildings, 1 sculpture, 6 roads, and 3 highway exits.

This project adopts the "multi-network integration" control technology of HDL intelligent lighting control system, wireless local area network, GPRS and GSM short message control system in the night illumination of large-scale cities. The control area is about 20 square kilometers, and the computer in the central control room is The center sends the switch light command to each signal receiving point according to the schedule through the wireless network to achieve the purpose of intelligent management. In the aspects of convenient management, fault alarm, energy saving, etc., it is a typical "multi-network integration" successful application case. The project has effectively improved the image of the night view of the city and enriched the evening life of the citizens.

This project is one of the large-scale outdoor landscape lighting wireless network control system projects in China. It is contracted by Beijing Beidiantong. Guangzhou Hedong Enterprise is responsible for the design, product supply and commissioning of intelligent control system.

This paper briefly introduces the system principle, engineering design and main problems and Solutions in the intelligent control system of the night scene wireless lighting project in Changping District, Beijing. For the reference of the industry.

Second, the principle of the control system:

The distribution of 42 receiving points in the night lighting wireless lighting project in Changping District, Beijing is as follows:

There are 3 flood control loops for each building, 4 lighting control loops for each road, 6 control loops for each park and square, and 3 control loops for each roundabout and green space. Considering that the power of the outdoor lighting control loop is relatively large, in order to save cost, the load loop is currently controlled by means of an intelligent switch to control the AC contactor.

Because we have to consider the laying problems of the entire urban area, we have selected professional-grade 5.8G and 2.4G wireless Ethernet bridges as the wireless transmission network of Changping District Intelligent Lighting Control System. The signal of the remote control light switch can also transmit video signals with a maximum transmission rate of 54Mbps. The entire intelligent control system products use HDL-BUS products, including time control modules, intelligent switch modules, and intelligent electronic label panels.

In the era when modern technology is more and more developed, the traditional wired network architecture, due to the higher cost and cost of laying fiber or cable, the development of wireless technology is more mature and the cost is lower and lower. Therefore, more applications have begun to move toward wireless applications. WLAN (Wireless Local Area Network) applications and products are also more and more mature. From the previous indoor applications to the present, there are many outdoor products that can provide wireless broadband. The transmission capability realizes the function of transmitting a large amount of data and video signals without distance. In the frequency band, there are two public frequency bands of 5G and 2.4G, which can be applied except for one-time installation cost, and the maintenance cost and time are also more than wired. The maintenance comes with saving money and saving time.

Third, the system design solution points:

1. Design points of wireless network signal transmission system:

The Changping District Nightscape Project is one of the key projects of the 2008 Beijing Olympics environmental construction plan. We conducted a field survey of the entire Changping District. Some control points on the site were not visible in a straight line with the general control room, and the buildings with different heights were blocked from receiving signals. Considering the structure, site factors, stability, reliability, system scalability and economy of the whole system, we designed a mix of 5.8G and 2.4G frequency band devices, and adopted 5.8G frequency band equipment on the main road to ensure the The main road communication is smooth, and a relay station is set in the middle of the control point that cannot be directly viewed, and the 2.4G band equipment is mainly responsible for signal transmission at a close distance.

The wireless bridge used in this system has the following security and confidentiality agreements.

WEP Key encryption mechanism: support 64/128/152bit, ASCII/Hex code

Support WPA802.1x security mechanism and RADIUS function

Support for the latest encryption security protocols and algorithms (AES/TKIP)

2. Introduction to the distribution of wireless networks in the first phase of the project

The first phase of the project's general control point municipal committee installed a dual-frequency bridge, which uses 2.4G bridge and 5.8G bridge to connect the mobile building, Furong Hotel, and Songyuan Community three transfer stations. The system transmits the longest distance of about 3.5Km.

The mobile building is closer to the main control point, so the 2.4G bridge connection is used (cost saving).

The Songyuan Community uses a 5.8G bridge to connect to the central point and a 2.4G bridge to connect to each control point.

The Hibiscus Hotel uses two 5.8G bridges to connect to each control point.

The court is both a control point and a secondary transfer station. Connect the mobile building with a 5.8G bridge and connect the various control points with a 2.4G bridge.

The Chengjiao interchange is also a control point and a secondary transfer station. Because there is a 2.4G wireless bridge nearby, the 5.8G bridge is used as the main trunk transmission.

3. Introduction to the wireless network distribution of the second phase of the project The urban remote transmission of the second phase of the project is about 7Km. The first phase of the project has fully considered the compatibility with the entire system during the second phase of the project. The first phase of the system is smoothly docked, compatible with each other, and can ensure the operation of the entire intelligent control system is reliable, so as to avoid repeated investment.

Add a dual-frequency bridge to the municipal station committee of the total station, and use the 2.4G and 5.8G bridges to connect the relay stations of Ningxinyuan Community, Furong Hotel, Jingkeyuan Community and Tuoranjiayuan Community respectively. Jingkeyuan Community The Zhongguancun Building is connected by a 2.4G bridge, and the remaining transit bridges are connected by a 5.8G bridge. This saves a wireless bridge.

The Ningxinyuan Community uses a 2.4G bridge to connect to the triangular ring island control point. With a 5.8G bridge, two antennas are connected externally, one antenna is connected to the center point, and the other antenna is connected to the transfer station of the Ming Tombs and the control point of the military supervision bridge.

The transit station of the Ming Tombs uses a dual-frequency bridge, which is connected to two antennas. The 5.8G part is connected to the Ningxinyuan community, and the 2.4G part is connected to the control points of the Ming Tombs.
The Furong Hotel uses a 5.8G bridge to connect two 5.8G antennas to each control point.

The Jingkeyuan Community uses the 2.4G bridge to connect the master control, and the two control points of the Lushan Square and the Chemical University use the 5.8G bridge.


The Tuoran Home Community uses 2.4G bridges to connect with the A and B buildings of the North Control Building. The two external antennas of the 5.8G bridge are connected to the control points of Dongfu Road and Baifuquan Road respectively.

Because Zhongguancun Building is relatively close to the municipal management committee, it directly uses the 2.4G bridge, and the external antenna is connected to the center point.

2 points on the east side of Baifuquan Road in the same way

3, night lighting control system design points:

According to the requirements of the owner in terms of stability, reliability, energy saving and convenient management, we have the following main requirements for the design of the night lighting control system in Changping District, Beijing:

Adopt HDL "multi-network integration" intelligent lighting control technology.

Set up the general control room of the central management office to facilitate the owner's management of the entire system and achieve the purpose of intelligent management.

The switch light command is transmitted to the respective signal receiving points in a predetermined time sequence through the computer of the master control station.

A smart electronic label panel with Chinese display is set in the main control room for manually starting the system switch light when the clock fails.

The switch light command is controlled by the mobile phone in GPRS mode.

The switch light command is controlled by a mobile phone in a short message (SMS) manner.

All devices are queried by GPRS or short message (SMS) via mobile phone.

Switching light control is controlled in a time-controlled manner by the astronomical clock.

The AC contactor is controlled by an intelligent switch control module.

The intelligent electronic label panel manual control switch light is arranged in the distribution box for the single-circuit emergency switch in the distribution box.

Fourth, the engineering solution points:

1, the general control room

The general control room sets up a high-performance total server, sets the predetermined program through software, and sends commands to each signal receiving point. After receiving the command, the receiving point retrieves the corresponding scene from the control module to complete the remote control task. The intelligent control panel is also provided with a smart electronic label panel for emergency manual startup when the timing fails.

2. Landscape lighting control system software

The static landscape control software is developed by Hedong Enterprise itself, and can be customized according to the actual situation of the project. The graphic monitoring software of Changping District Landscape Lighting Project is customized according to actual needs. The software can run on WINDOWS XP and 2000. The operation platform, the software uses the geographical graph of Changping District as the control interface. If you need to control, move the mouse to the corresponding distribution box of the graph and directly switch the remote control device.

In terms of management, the control software uses color blocks to represent the current working state of each distribution box. It also has a display of status such as remote, SMS, and network. If the device is abnormal, the SMS alarm system will send the corresponding distribution box number to the authorized mobile phone.

3, mobile phone text message (SMS) control

The SMS control switch light mode is sent to the HDL short message control module through the mobile network through the specified Chinese character command format. The module communicates directly with the general server through the TCP/IP network. After receiving the command, the total server specifies the content according to the short message. The device is switched on and off.

The contents of the short message include: three-digit input control password (Arabic number), distribution box number (Arabic number), control content (Chinese characters), and the content is separated by commas.

The password is controlled to protect the entire system from other illegal controls. The password can be changed in the system settings of the monitoring software to improve the security of the system. If the content of the SMS is not complete or the password is incorrect, the system cannot be controlled. In addition, a text message can be sent through the mobile phone to reply to the switch status of all control points, so that the management personnel can monitor the working state of the entire system device. This control method is suitable for any mobile phone.

Text command format for SMS control:

Enter the password ***, distribution box number, control content (on/off) The mobile number sent to the SMS module.

For example: ***, Construction Committee. Court. Radio and Television Center. Chengbei Street Office, open/close to 1590*****9

4, GPRS control switch mode

Using the mobile phone's GPRS network, the lights are turned on and off by software installed in the mobile phone. The GPRS control mode is intuitive. In the mobile phone software, it is possible to directly click on the power distribution cabinet according to the partition, and to switch the light and query the device, which is a simplified version of the total server. But this method only works for smartphones and WINDOWS Mobile operating systems.

5, astronomical clock control

The clock control adopts the HDL-MT12 clock module and is controlled according to the time zones divided into spring, summer, autumn, winter and major holidays (Chinese New Year, May 1st, 11th, and New Year's Day). HDL-MT12 clock module is a standard 35mm rail-mounted structure with independent programmable event cycle; multiple mode control; also has working modes such as working days, rest days, holidays. This module also has remote programming and management functions; soft reset function without power-off; automatic synchronization of system clock source; protection against illegally modified electronic code locks.

The following is a partial schedule of the Changping night control that has been set in the astronomical clock.

6, modular structure

The control module uses the HDL-MR0610 switch module to control the AC contactor. The control module is a standard 35mm rail-mounted structure with its own scene controller. The maximum output is 10A per channel. It has short-circuit and overload protection, and the output has LED status indicators. Emergency pass-through control function, no need for power-off soft reset and other functions. All scenes are stored in the HDL-MR0610 module, reducing the delays that can be caused by directly calling the scene from a remote location.

7, manual emergency control method

In each power distribution cabinet, the HDL-MP4RME electronic label smart panel is also set as the emergency manual control. This panel is a multi-function electronic label wall panel, Chinese liquid crystal display interface, text can be changed, back display, and infrared remote control can be received. Manual control is available when the network system fails or is being maintained.

V. Conclusion

The Beijing Changping District Nightscape Project is a successful case of the application of HDL wireless intelligent lighting control system in large urban landscapes. The first phase of the intelligent control system has been in operation for more than 4 months, safe and reliable, and greets the urban and rural environment of the 2008 Olympic Games in Beijing. Reconstruction and construction contribute. Practice has proved that the system not only saves energy, saves human resources, and facilitates system maintenance, but also prolongs the service life of the lamps.

The HDL intelligent lighting control system is combined with multiple networks such as wireless LAN, GPRS, and SMS (SMS) to form a "multi-network integration" system with unique distributed structure and strong scalability. . HDL intelligent lighting control system also has a new generation of lighting control modular equipment required for modern landscape lighting control such as DMX control module, laser control module and LED control module. It is suitable for large bridges, museums, exhibition halls and outdoor landscapes. Dynamic lighting control. The author has successfully applied HDL "multi-network integration" intelligent lighting control in some famous large-scale projects at home and abroad (such as Nanjing Yangtze River Third Bridge, Guangzhou Pearl River Night Dynamic Lighting, Munich Munich BMW Museum Pavilion lighting and other projects). system.

The author believes that the "multi-network integration" intelligent lighting control system built on the network, multimedia control, and multiple signal protocol platforms is a trend that the current landscape control system has developed.

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