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Research on wireless communication monitoring system of urban street lamp
time：
2021-09-15
(city street lamp management office, zip code 224000) and the main functions of each system are described in detail. It is concluded that the wireless communication monitoring system is reliable and stable, and can monitor the operation of the street lamp system and relevant data in real time, so as to realize the effective monitoring of the street lamp system.
(city street lamp management office, zip code 224000) and the main functions of each system are described in detail. It is concluded that the wireless communication monitoring system is reliable and stable, and can monitor the operation of the street lamp system and relevant data in real time, so as to realize the effective monitoring of the street lamp system.
As the product of social and economic development, urban street lamps belong to urban infrastructure construction. City street lights enrich the nightlife of the city, For the night Hall (we have provided great convenience and played a great role in beautifying the city's night scenery, ensuring night public security and traffic safety. As an important part of urban construction, urban street lamps have attracted more and more attention from government departments and all sectors of society. Doing a good job in urban street lamp construction is important to reduce traffic accidents, prevent and reduce crimes and maintain the image of the city And beautifying the environment. Therefore, special attention should be paid to the wireless communication monitoring system of urban street lamps.
At present, the monitoring system of urban street lamps in China is mostly a single communication mode. Some choose the private network communication of radio stations, and some use wired scheme, CDPD technology or GPRS / GSM incoming communication. Most of these communication technologies are mature and widely used in urban street lamp management system, but various problems can not be avoided in the application process. Therefore, we should make full use of the advantages of various communication technologies.
1、 The structure of urban street lamp wireless communication monitoring system and the main component of supervision level is remote supervision system. Users are connected to the main monitoring system through Wan or LAN, so as to timely obtain the current situation of street lamps and the monitoring system. According to the access way, the supervision system can be divided into LAN access and WAN access. In general, the staff of the street lamp management office can check the operation of the street lamp through the LAN, but can not send instructions to the monitoring center of the main control room. The administrator at the upper level uses the wan to view the real-time information of street lamps or the past information of street lamp operation hall, and can send instructions to the monitoring center in the main control room.
The main components of the monitoring level are database management system, main control system, etc. The monitoring level is used to control and manage the wide area distributed RTU stations, and collect the street light site information of each RTU station to form a distributed or centralized control system. The main control system of this control system is consistent with the existing main control system. The monitoring uses two industrial control step-by-step into the hall, and the information exchange uses 100M Ethernet and database management system into the hall. Different from the existing system, the new database management system can provide remote access, and the remote client can use the network to view the latest or historical database information.
3 field control level the main components of the field control level are RTU, switchgear and detection device. The on-site control level directly controls the entry of street lamp equipment into the hall, and timely detects the relevant parameters of street lamp status into the hall. The field control level usually constitutes the wide area distributed control of a city. Its RTU site supports not only radio communication, but also SMS communication, GPRS synchronous transmission and other communication methods.
2、 Communication interface of street lamp monitoring system the communication interface of street lamp monitoring system has two communication systems: field control level and monitoring level communication interface, also known as interface I: monitoring system and monitoring level communication interface, also known as interface IL. Interface I not only supports SMS / GPRS communication provided by telecom operators, but also supports private network communication of radio stations. Interface I also formulates the agreement on information exchange between on-site monitoring level and monitoring level.
Like interface I, the interface also establishes relevant protocols for information exchange between supervision level and monitoring level. The interface supports two communication modes: WAN based on Web services and LAN. This interface enables the interaction of hall entry information through intranet or Internet.
3、 The structure of wireless communication system in urban street lamp monitoring system the structure of wireless communication system of urban street lamp monitoring system is mainly composed of communication processing module, disconnection or monitoring module and communication module.
1 communication processing module the communication processing module provides relevant communication services for the disconnection or monitoring module with the help of the services provided by the communication module. In this process, the disconnection or monitoring module can realize barrier free communication with the monitoring terminal by means of radio, SMS or GPRS without any modification. And as long as the relationship between layers is not changed, even if the communication module is changed, it will not affect the disconnection or monitoring module.
2 shut off or monitoring module shut off or monitoring module can provide a good interface for the executive hall operator to operate the street light switch in the hall. This module can cut off the information sent by RTU station into the hall, and automatically generate various forms of alarm information to deal with the faulty report properly. With the help of LAN and computer IP or TCP protocol, complete data access and realize mutual exchange with the database on the server. It can also complete the local backup of key data on the server to prevent the paralysis of the monitoring system in case of network or server failure.
In the communication module, GPRS communication, radio communication, IP or TCP communication and SMS communication can be organically combined. Make it realize the communication function: ⑴ the communication between GPRS and remote measurement and control terminal is realized by GPRS module; ⑵ the first information of radio station is realized by RS232C serial port; ⑶ IP or TCP communication is realized by IP / TCP protocol; ⑷ the communication between SMS and remote measurement and control terminal is realized by SMS module.
4、 Functions of each system: 1. Set the time table of street lamp switching. The monitoring center can automatically set the annual switching time according to the longitude and latitude of the city, and can also be corrected. The monitoring center sends the time table of switching lights to each RTU station in the form of broadcast command, and the station switches lights according to the time table.
2 switch control function of street lamp the control function of switch lamp includes three modes: remote control switch lamp control, RTU station automatic control and photosensitive correction automatic control.
The monitoring center can call the RTU station to obtain the switching conditions and fault parameters of the street lamps. In this way, we can understand the street lamp switch status of each RTU station and whether the device has fault.
4 telemetry function after receiving the active call from the monitoring center (including random detection and patrol inspection), each RTU station will upload the collected data to the inter monitoring center in time. The monitoring center makes a historical database based on these data to estimate the failure rate and lighting rate of street lamps.
5 the telemetry freezing function host can take the form of broadcast command to make each RTU station seal the collected current, electric E and other data at the same time. Then the monitoring center calls each RTU station into the hall one by one, and the RTU station immediately uploads the frozen data. After the monitoring center obtains these data parameters, it can accurately calculate the bus loss and total power of the system.
6 fault alarm function: the database of the monitoring center analyzes the information uploaded from the RTU site into the hall according to the preset alarm conditions, obtains the data alarm information, and transmits these information to the main control computer for displaying and entering the hall voice alarm.
7 function to change the working mode of RTU station. The working mode of RTU station includes cheap end light working mode, midnight light working mode, alternating energy-saving mode, etc. the monitoring center can issue commands to RTU station to change some working modes and select the most expensive working mode.
5、 Conclusion the wireless communication monitoring system of urban street lamps and scientific research achievements in many technical fields, such as communication technology, computer technology, automatic monitoring technology, etc. the application of these technologies is an important symbol of urban modernization, realizes the centralized management and monitoring of urban street lamps by computer system, and saves power consumption Environmental protection and urban public safety play a great role in promoting. Realize the organic combination of economic and social benefits.
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