Rail transit wireless transmission signal intelligent monitoring and early warning system and method thereof
A wireless transmission and rail transit technology, applied in the field of rail transit, can solve the problems of heavy tasks, low efficiency, tight time, etc., to avoid safety accidents, avoid safety hazards, and improve maintenance efficiency.
Inactive Publication Date: 2019-06-25
杨馨
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Problems solved by technology
However, there are about 1,500 sets of antenna and feeder lines on a subway track line. Maintenance personnel need to troubleshoot faults from the stop of operation at night to the start of operation the next day. They only have less than 4 hours a day. The time is tight, the tasks are heavy, and the efficiency is low.
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[0027] In the final analysis, the wireless signal transmission performance and signal strength are the radiation capability of the antenna feeder. Once the standing wave ratio of the antenna feeder is abnormal, the wireless transmission performance will be affected. By monitoring the standing wave ratio of the antenna feeder, the wireless signal can be judged. Whether the transmission is normal.
[0028] Standing wave ratio is called voltage standing wave ratio, referred to as VSWR (Voltage standing wave ratio). In fact, it is the ratio of the antinode voltage of the standing wave to the valley voltage amplitude. If VSWR=1, it means that the impedance of the feeder and the antenna feeder is completely matched, and the high-frequency energy will be completely radiated through the antenna feeder, and the energy will not be reflected. Loss; if the VSWR is infinite, it means total reflection, and the energy is not radiated at all. In the subway signal system, the antenna feeder i...
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The invention discloses a rail transit wireless transmission signal intelligent monitoring and early warning system and a method thereof. The system comprises antenna feeder detection devices, wireless routers and a background display terminal; one antenna feeder detection device is connected to each antenna feeder, the antenna feeder detection devices are in communication connection with the wireless routers arranged beside a rail through the Ethernet, the wireless routers are in wireless communication with the display terminal, the display terminal is carried on a routing inspection train, and the routing inspection train runs along the rail and receives detection data sent by the wireless routers along the way. According to the system, the routing inspection train is utilized for quickly collecting monitoring values of all the antenna feeders, compared with manual point-by-point detection, the maintenance efficiency is greatly improved, and hidden safety hazards caused by manual frequent disassembly and assembly are avoided.
Description
technical field [0001] The invention relates to the technical field of rail transit, in particular to a rail transit wireless transmission signal intelligent monitoring and early warning system and a method thereof. Background technique [0002] Among the constituent elements of the rail transit wireless transmission system, the antenna feeder has been exposed to the air and is always eroded by various media in the air. Especially the antenna feeder of the viaduct section is subject to ultraviolet rays, rain, hail, strong The hazards of light exposure and dust and sandstorms. With the accumulation of erosion over time, the failure rate of antenna feeder is higher than that of other equipment. The damage to the antenna feeder caused the loss of wireless signal of the train passing through the area, which caused the train to lose control and cause an accident. [0003] According to statistics, accidents caused by damage to antenna feeders account for about one-third of train...
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IPC IPC(8): B61L27/00
Inventor 杨馨
Owner 杨馨