Antenna device and method applied under shielding condition of tunnel inspection well interior cover

Abstract

The invention discloses an antenna device and a method applied under a shielding condition of a tunnel inspection well interior cover. The antenna device applied under the shielding condition of the tunnel inspection well interior cover comprises antennae, an antenna feeder line and a junction plate, wherein the antennae are respectively arranged at two ends of the junction plate, the antennae at the two ends of the junction plate are collinearly arranged, the antenna feeder line is arranged on the junction plate and along the direction vertical to the antennae, and an assembly unit of the antennae, the antenna feeder line and the junction plate is placed in a three way housing. The antenna device and the method applied under the shielding condition of the tunnel inspection well interior cover have the advantages of achieving the purpose of breaking shielding of a cast iron outer cover by scattering and reflecting signals under a tunnel environment through design of the antennae and integral installation of the antennae and the interior cover, achieving wireless communications between the interior and the exterior of a tunnel, and achieving reliable and stable information transmission.

Description

technical field [0001] The invention relates to an antenna device, in particular to an antenna device and a method applied to the shielding condition of a sub-cover in a tunnel inspection shaft. Background technique [0002] Power tunnels are generally located in an environment with a depth of 2 or 3 meters underground. At present, antennas in the GSM900MHz frequency band used in tunnel environments mostly use vertical polarization with narrow lobe pointing width and concentrated energy. communication. For tunnel inspection wells, the wellhead is equipped with an outer cast iron manhole cover and an inner sub-cover. The shielding effect of the outer cast iron cover on the antenna signal is obvious, and the simple use of high-gain antennas cannot achieve the shielding purpose of penetrating the cast iron outer cover. [0003] Due to the shielding effect of the outer cast iron manhole cover, the received signal of the wireless signal in the tunnel environment is very weak, w...

AI Technical Summary

Problems solved by technology

The shielding effect of the outer cast iron cover on the antenna signal is obvious, and the simple use of high-gain antennas cannot achieve the purpose of penetrating the shielding of the cast iron outer cover

[0003] Due to the shielding effect of the outer cast iron manhole cover, the received signal of the wireless signal in the tunnel environment is very weak, which often leads to the interruption of the communication between the inner sub-cover in the tunnel and the outside world, and the outside staff cannot automatically obtain the status of the monitoring inner sub-cover. When the manhole cover is lost or damaged, outsiders cannot obtain early warning information through the inner cover, thus losing the monitoring function of the inner cover and the outer manhole cover

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