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12429 results about "Transmission line" patented technology

In radio-frequency engineering, a transmission line is a specialized cable or other structure designed to conduct alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account. Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas (they are then called feed lines or feeders), distributing cable television signals, trunklines routing calls between telephone switching centres, computer network connections and high speed computer data buses.

Power transmission line inspection system based on fixed-wing unmanned aerial vehicle

InactiveCN103163881AImprove the effectiveness of inspection workSolve the problem of difficult macro inspectionVehicle position/course/altitude controlPosition/direction controlFly controlEngineering
The invention discloses a power transmission line inspection system based on a fixed-wing unmanned aerial vehicle. The power transmission line inspection system based on the fixed-wing unmanned aerial vehicle comprises a ground station and a fixed-wing unmanned aerial vehicle, wherein the ground station comprises a ground control system, an image receiving system, and a data processing system, the fixed-wing unmanned aerial vehicle comprises an unmanned aerial vehicle body, a remote sensing monitoring device, a real-time detection device, an image transmission system, an instruction receiving system, a power system, and a flying control system. The remote sensing monitoring device is used for collecting image information in an area of a power transmission line at a fixed time or a fixed distance or a fixed spot, the real-time detection device is used for collecting information in the area of the power transmission line in real time, and the remote sensing monitoring device and the real-time detection device are arranged on the unmanned aerial vehicle body in a front-and-back adjacent and direct-to-ground mode. The power transmission line inspection system based on the fixed-wing unmanned aerial vehicle is capable of conducting periodical or emergent macroscopic inspections on the power transmission line and accessory equipment of the power transmission line, so that labor intensity of manual power transmission line inspection work is greatly reduced, and power transmission line inspection efficiency is improved.

Path setting method, and network, relay station and parent station employing the path setting method

The present invention provides a path setting method for automatically setting network paths. The path setting method for generating paths in a network including a plurality of relay stations and a parent station which are connected with each other through a transmission line, comprises the steps of allowing each of the parent station and the plurality of relay stations to transmit basic information including its own identifier and its own path setting status, by means of a repetitive broadcast, allowing the relay station receiving the basic information to recognize the parent station or another relay station having a temporary path set thereto and transmit its own receiving-environment table including a transmission quality on the transmission line to the recognized station, allowing the another relay station receiving the receiving-environment table to forward it to the parent station through the use of the temporary path so as to notify the receiving-environment table to the parent station, and allowing the parent station receiving the forwarded receiving-environment table to set a temporary path to the relay station which has transmitted the receiving-environment table. In this manner, the parent station collects the transmission qualities on the inter-station transmission lines stepwise in order of the closest relay station to the farthest relay station to automatically set the paths.
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