Stepping inquiry-response locating system for flight data recorder

Abstract

The invention discloses a stepping inquiry-response locating system for a flight data recorder. The stepping inquiry-response locating system comprises a flight data recorder (FDR) airborne triones locating device and a ground mobile searching and locating device, wherein the FDR airborne triones locating device is installed in the flight data recorder; and the ground mobile searching and locating device is installed in a mobile ground station for search and rescue. The stepping inquiry-response locating system for the flight data recorder adopts a triones navigating and locating system, an inquiry-response mode and a multi-point locating system, and transmits a radio data packet which contains an identification code and position coordinates and has a designated response signal frequency,a searching and locating method comprises a mutual corroborating mode of the position coordinates of a cooperative and related locating algorithm, so research and rescue personnel can quickly find the flight data recorder of a wrecked airplane according to the received triones coordinate information and designated frequency, accordingly, the purpose of quickly finding an object is realized, a great deal of manpower, resources, financial resources and time can be saved, and the rescue efficiency is improved.

Description

technical field [0001] The invention belongs to the field of aviation technology, in particular to a Beidou navigation system-based step-by-step query-response search and positioning method for a flight data recorder (FDR, commonly known as a "black box") for recording the running state of a vehicle. Background technique [0002] The agency responsible for the investigation of aviation accidents in the United States-the former vice chairman of the National Transportation Safety Board and safety expert Robert Francis said, "If the flight data recorder cannot be found, it will be a great shame to the aviation industry. Because if we want to To avoid similar tragedies, we must first know what went wrong." Boeing once said: "Many times, we can only improve aircraft by finding faults through air crashes." Relying on the flight state parameters recorded by the flight data recorder, accident investigators can directly obtain or infer the cause of the aircraft crash. These flight s...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the common problems existing in traditional flight data recorder positioning technology are: ① Since the crash trajectory of the flight data recorder cannot be known, the place where the plane disappeared from the radar screen can only be judged as the crash site, thus bringing about the determination of the location. Difficulty in range; ② Unable to know the exact location where the flight data recorder fell

Due to the large scattered area of ​​the crashed aircraft, the search range is uncertain, so a large-scale and large-scale search for a needle in a haystack can only be carried out at the scene of the air crash; ③Single-frequency non-directional positioning signals are easily interfered by the surrounding electromagnetic environment , the underwater surface is easily affected by background noise, resulting in many false targets; ④The single-frequency non-directional positioning signal does not contain any auxiliary positioning information, and can only manually judge the approximate orientation according to the strength of the energy; ⑤The time available for searching is not long enough , the success rate is not high

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