1. Project Background
In recent years, the theft of power cables for municipal street lamps has been very serious. After the cable was smashed, on the one hand, it caused major direct economic losses. On the other hand, it also affected the normal operation of municipal facilities, posing a serious threat to the safety of municipal administration.
While strengthening the crackdown on the law and increasing the strength of civil defense, the acquisition of specialized and targeted security systems to realize intelligent anti-theft of power cables for municipal street lights should be an important technical means for solving problems.
The municipal street light cable anti-theft system consists of three parts: the anti-theft terminal, the anti-theft host and the monitoring center. Among them, the anti-theft host can be operated independently, or it can be networked and operated. Under the unified coordination of the monitoring center, when the anti-theft host receives any alarm information from the anti-theft terminal, it can quickly determine the alarm location and the faulty cable, and publish the alarm information to the contact phone pre-set by the system. The tunnel management and patrol personnel can respond quickly and take timely measures to stop the tunneling of the tunnel cable. Relevant alarm information can also leave records in the computer system for future traceability management.
2. Status of the project
There are many related technologies for cable anti-theft, but they all have certain defects.
2.1 The power carrier detection method, because the street lamp belongs to the low-voltage line, and the line is buried in the ground, the line interference is strong, limited by the cable length and the capacitive load in the cable.
2.2 pure current detection method, when the cable is partially stolen, the cable still exists current, there is a phenomenon that the police do not report. Also not suitable for anti-theft needs of voltage and current-free blower cables
3. Project Description
For the above-mentioned shortcomings, the EH110 “Tianwang†all-weather street light cable anti-theft system introduces the German cable detection core processing technology. The detection accuracy is up to 99.9% when no power is applied. The cable ends use passive signal detection devices and can be used at any time of the day, any time. The normal operation in the environment eliminates the instability factor caused by the addition of active signal generator at the end of the cable in traditional carrier detection, and fundamentally solves the problem of long-term stability and reliability of cable anti-theft.
4. System topology
5. System function
The system has an accurate alarm function, users can real-time through the SMS / monitoring platform to understand real-time cable status.
Anti-theft without electricity: The system completes the detection of the cable integrity in the non-powered state through the non-electric communication technology. When the system cable is cut off, the alarm host can actively detect the state of the road and generate an alarm signal.
Anti-theft of electricity: The system completes the cable integrity detection through the power carrier sense technology. When the line cable is cut off, the alarm host can actively detect the state of the line and generate an alarm signal.
Anti-theft power failure: The system uses the external rechargeable power supply to complete the alarm function of the alarm host in the event of power failure. When the device has no AC power input, the system can automatically switch to the external power supply, using power-free anti-theft to achieve power anti-theft.
6. System design basis
â—† "Light Control Device" (GB19510-2009)
â—† "Control Network Protocol Specification" (EIA-709.1)
â—† "Shell Protection Grade" (GB4208-1993)
â—† "General Electric Equipment Distribution Design Specification" (GB50055-1993)
â—†"Specifications for Design of Measuring Devices for Electrical Installations" (GBJ63-1990)
â—† "Code for Design of Electronic Information System Room" (GB50174-2008)
â—† "Code for Low Voltage Electrical Construction and Acceptance of Electrical Installation Engineering" (GB50254-2006)
â—† "Technical Specifications for Temporary Power Supply on Construction Sites" (JGJ46-2005)
â—† "Project Bidding Document"
â—† "System Technical Requirements"
◆《Lighting Control Cabinet Electrical Schematic Diagram》
National Standard GB/T9043 "General Technical Conditions for Gas Discharge Tubes for Overvoltage Protection of Communication Equipment"
International Telecommunication Union standard ITU-TK.12 "Properties of gas discharge tubes for protection of telecommunication installations"
Ministry of Information Industry Standard YD/T694 "Main Distribution Frame"
* Department GA173 "computer information system lightning protection device"
GJJ45-91 "Code for Design of Urban Road Lamps"
GB/T13729-92 "General Technical Conditions for Telecontrol Terminals"
DL5003-91 "Power System Dispatch Automation Design Specifications"
GB5008-95 "Low voltage distribution design specifications"
Industrial Enterprise Communication Design Specification GBJ79-85
Communication protocol specification ISO11898
IEC1131-3 international standard universal programmable language design standard "TCP/IP communication protocol" Tsinghua University Press standard: IEEE802.11b wireless LAN, IEEE802.3 and IEEE802.3u
Digital cellular mobile communication network mobile station equipment technical specification YDN055-1997900/1800MHz TDMA
In recent years, the theft of power cables for municipal street lamps has been very serious. After the cable was smashed, on the one hand, it caused major direct economic losses. On the other hand, it also affected the normal operation of municipal facilities, posing a serious threat to the safety of municipal administration.
While strengthening the crackdown on the law and increasing the strength of civil defense, the acquisition of specialized and targeted security systems to realize intelligent anti-theft of power cables for municipal street lights should be an important technical means for solving problems.
The municipal street light cable anti-theft system consists of three parts: the anti-theft terminal, the anti-theft host and the monitoring center. Among them, the anti-theft host can be operated independently, or it can be networked and operated. Under the unified coordination of the monitoring center, when the anti-theft host receives any alarm information from the anti-theft terminal, it can quickly determine the alarm location and the faulty cable, and publish the alarm information to the contact phone pre-set by the system. The tunnel management and patrol personnel can respond quickly and take timely measures to stop the tunneling of the tunnel cable. Relevant alarm information can also leave records in the computer system for future traceability management.
2. Status of the project
There are many related technologies for cable anti-theft, but they all have certain defects.
2.1 The power carrier detection method, because the street lamp belongs to the low-voltage line, and the line is buried in the ground, the line interference is strong, limited by the cable length and the capacitive load in the cable.
2.2 pure current detection method, when the cable is partially stolen, the cable still exists current, there is a phenomenon that the police do not report. Also not suitable for anti-theft needs of voltage and current-free blower cables
3. Project Description
For the above-mentioned shortcomings, the EH110 “Tianwang†all-weather street light cable anti-theft system introduces the German cable detection core processing technology. The detection accuracy is up to 99.9% when no power is applied. The cable ends use passive signal detection devices and can be used at any time of the day, any time. The normal operation in the environment eliminates the instability factor caused by the addition of active signal generator at the end of the cable in traditional carrier detection, and fundamentally solves the problem of long-term stability and reliability of cable anti-theft.
4. System topology
5. System function
The system has an accurate alarm function, users can real-time through the SMS / monitoring platform to understand real-time cable status.
Anti-theft without electricity: The system completes the detection of the cable integrity in the non-powered state through the non-electric communication technology. When the system cable is cut off, the alarm host can actively detect the state of the road and generate an alarm signal.
Anti-theft of electricity: The system completes the cable integrity detection through the power carrier sense technology. When the line cable is cut off, the alarm host can actively detect the state of the line and generate an alarm signal.
Anti-theft power failure: The system uses the external rechargeable power supply to complete the alarm function of the alarm host in the event of power failure. When the device has no AC power input, the system can automatically switch to the external power supply, using power-free anti-theft to achieve power anti-theft.
6. System design basis
â—† "Light Control Device" (GB19510-2009)
â—† "Control Network Protocol Specification" (EIA-709.1)
â—† "Shell Protection Grade" (GB4208-1993)
â—† "General Electric Equipment Distribution Design Specification" (GB50055-1993)
â—†"Specifications for Design of Measuring Devices for Electrical Installations" (GBJ63-1990)
â—† "Code for Design of Electronic Information System Room" (GB50174-2008)
â—† "Code for Low Voltage Electrical Construction and Acceptance of Electrical Installation Engineering" (GB50254-2006)
â—† "Technical Specifications for Temporary Power Supply on Construction Sites" (JGJ46-2005)
â—† "Project Bidding Document"
â—† "System Technical Requirements"
◆《Lighting Control Cabinet Electrical Schematic Diagram》
National Standard GB/T9043 "General Technical Conditions for Gas Discharge Tubes for Overvoltage Protection of Communication Equipment"
International Telecommunication Union standard ITU-TK.12 "Properties of gas discharge tubes for protection of telecommunication installations"
Ministry of Information Industry Standard YD/T694 "Main Distribution Frame"
* Department GA173 "computer information system lightning protection device"
GJJ45-91 "Code for Design of Urban Road Lamps"
GB/T13729-92 "General Technical Conditions for Telecontrol Terminals"
DL5003-91 "Power System Dispatch Automation Design Specifications"
GB5008-95 "Low voltage distribution design specifications"
Industrial Enterprise Communication Design Specification GBJ79-85
Communication protocol specification ISO11898
IEC1131-3 international standard universal programmable language design standard "TCP/IP communication protocol" Tsinghua University Press standard: IEEE802.11b wireless LAN, IEEE802.3 and IEEE802.3u
Digital cellular mobile communication network mobile station equipment technical specification YDN055-1997900/1800MHz TDMA
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