Cable tunnel positioning and broadcasting system employing VLC-PLC technologies

Abstract

The invention discloses a cable tunnel positioning and broadcasting system employing VLC-PLC technologies. The cable tunnel positioning and broadcasting system comprises a personnel positioning and broadcasting subsystem based on the VLC technology and a high-rate big data transmission subsystem based on the PLC technology; the personnel positioning and broadcasting subsystem comprises a PC broadcasting main station located outside a tunnel, and lighting and communication integrated LED light sources and a mobile talkback terminal both located in the tunnel; the high-rate big data transmission subsystem comprises at least one PLC transmission network; all the PLC transmission networks are communicated by using power lines; each PLC transmission network comprises a PLC main station and at least one PLC base station; the lighting and communication integrated LED light source comprises a fixed-point light signal receiving / transmitting processing unit and a PLC interface module; the fixed-point light signal receiving / transmitting processing unit is correspondingly connected with the PLC base station via the PLC interface module; the mobile talkback terminal comprises a talkback device and a mobile terminal optical signal receiving / transmitting processing unit connected with the talkback device. The cable tunnel positioning and broadcasting system employing the VLC-PLC technologies has the advantages of convenience for mounting, cost saving, high transmission efficiency and no electromagnetic interference.

Description

technical field [0001] The invention belongs to the technical field of visible light communication, in particular to a cable tunnel positioning and broadcasting system using VLC-PLC technology, and is especially suitable for positioning and communication in power cable tunnels. Background technique [0002] With the rapid development of my country's economy and the continuous expansion of urban scale, urban power supply transmission cables are gradually changing from overhead lines to power cables. As a channel for cable lines, the construction speed and mileage of cable tunnels are increasing year by year. The vast majority of underground cable trenches have the characteristics of insufficient lighting, very weak signal reception by the GPS system, and poor voice intercom effects. GPS technology and intercoms cannot be effectively used in such occasions. Therefore, the inspection of the cable trench in the cable work area of ​​the power supply company and the construction ...

AI Technical Summary

Problems solved by technology

The vast majority of underground cable trenches have the characteristics of insufficient lighting, very weak signal reception by the GPS system, and poor voice intercom effects. GPS technology and intercoms cannot be effectively used in such occasions.

Therefore, the inspection of the cable trench in the cable work area of ​​the power supply company and the construction personnel lack the ability of full-time positioning and emergency response to events, which increases the difficulty of inspection and maintenance of the construction personnel, and there are also hidden dangers in work safety.

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