Flight data recording system and method based on Beidou searching and positioning

Abstract

The invention provides a flight data recording system and method based on Beidou searching and positioning, a Beidou beacon module is arranged in a flight data recorder, and the flight data recorder is used for receiving and recording flight data from an aircraft; the maintenance equipment is connected with the flight data recorder and is used for setting an address reported by the positioning equipment in the Beidou beacon module in advance; the flight data recorder can receive a falling and collision signal of the aircraft, and when the flight data recorder receives the falling and collision signal, the flight data recorder can be actively separated from an aircraft body; when the flight data recorder is separated from the aircraft body, the flight data recorder can obtain self position information through the Beidou beacon module and send the self position information to the positioning receiving device through the Beidou beacon module. According to the invention, the requirement that a traditional flight data recorder cannot quickly acquire flight data due to limited positioning capability after an aircraft accident can be solved, and the manpower searching and seaborne salvage cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of avionics technology. Specifically, it relates to a flight data recording system and method based on Beidou search and positioning. Background Art

[0002] The flight parameter data recorded by a flight recorder is an important basis for analyzing the cause of an accident. Since the underwater positioning beacon of the existing flight data recorder has a working range of only a few kilometers, the aircraft may be separated from the flight recorder when it crashes. Even if the positioning is successful, deep-sea salvage is difficult, time-consuming, costly, and even impossible. For example, in the Air France incident on June 1, 2009, warships and submarines were dispatched, and it took about two years to search, consuming nearly 30 million euros to find the recorder; in the Malaysia Airlines incident on March 8, 2014, more than 25 countries mobilized equipment such as satellites, warships, and aircraft, and the flight data recorder has not been found yet, and the cause of the accident has not been ascertained.

[0003] As an independent global satellite navigation system developed and operated by China, the Beidou satellite navigation system has been applied to many fields in China, such as forestry, transportation, environmental monitoring, aviation, ocean, electric power, surveying and mapping, etc. Due to the high positioning accuracy and unique short message function of the Beidou satellite navigation and positioning system, with the release of the CTSO standard of the first Beidou device in China, "CTSO-2C604a Beidou satellite navigation system (BDS) airborne equipment only used for aircraft tracking", the development and installation of flight data recorders based on Beidou search and positioning have become a reality, which can meet the user's need for quickly finding and salvaging the flight data recorder after a seaplane accident.

[0004] The patent document with the publication number CN116935512A discloses a flight parameter acquisition and recording system, which relates to the field of electronic communication technology. The flight parameter acquisition and recording system includes: a flight parameter acquisition device, a recording device, and an external bus. By setting multiple recording devices, the flight parameter acquisition device respectively realizes data transmission with each recording device through the external bus, and sends the flight parameter data to each recording device connected to each external bus, so as to provide multiple backups for the recording system and analyze the whole-aircraft recording data. However, this patent document still has the defect that it cannot achieve quick search and salvage. Summary of the Invention

[0005] Aiming at the defects in the prior art, the purpose of the present invention is to provide a flight data recording system and method based on Beidou search and positioning.

[0006] According to a flight data recording system based on Beidou search and positioning provided by the present invention, it includes: a flight data recorder, a maintenance device, and a positioning receiving device;

[0007] The flight data recorder is provided with a Beidou beacon module, and the flight data recorder is used to receive and record flight data from the aircraft;

[0008] The maintenance device is connected to the flight data recorder and is used to pre-set the address reported by the positioning device in the Beidou beacon module;

[0009] The flight data recorder can receive the crash signal of the aircraft. When the flight data recorder receives the crash signal, the flight data recorder can actively separate from the aircraft body;

[0010] After the flight data recorder separates from the aircraft body, it can obtain its own position information through the Beidou beacon module and send its own position information to the positioning receiving device through the Beidou beacon module.

[0011] Preferably, the flight data recorder includes: a battery pack, a positioning control module, a data receiving module, a data recording module, and a Beidou beacon module;

[0012] The battery pack is connected to the positioning control module, and the battery pack can supply power to the positioning control module;

[0013] The Beidou beacon module and the data receiving module are connected to the positioning control module, and the positioning control module can control the battery pack to supply power to the Beidou beacon module and the data receiving module;

[0014] The data recording module is connected to the data receiving module, and the data recording module can record and maintain flight data;

[0015] The Beidou beacon module can send a Beidou positioning signal containing position information to the positioning receiving device through a short message.

[0016] Preferably, a first Beidou antenna and a second Beidou antenna are arranged on the Beidou beacon module;

[0017] The first Beidou antenna and the second Beidou antenna can obtain the position information of the flight data recorder.

[0018] Preferably, the overall structure of the flight data recorder is a sheet structure;

[0019] The overall density of the flight data recorder is less than the density of water; when it falls into the sea, the flight data recorder can float on the sea surface in a front or back posture.

[0020] Preferably, the flight data recorder further includes: a cover plate and a base;

[0021] The cover plate is arranged on the base, and an installation space is formed between the cover plate and the base;

[0022] The battery pack, the positioning and control module, the data receiving module, the data recording module, and the Beidou beacon module are located in the installation space;

[0023] A sealing waterproof pad is arranged between the cover plate and the base, and the sealing waterproof pad is used to prevent water from entering the interior of the flight data recorder.

[0024] Preferably, both the cover plate and the base are made of wave-transparent composite materials;

[0025] When the flight data recorder floats on the sea surface, any Beidou antenna on the Beidou beacon module can expose above the water surface, and the Beidou antenna signal of the Beidou beacon module can be emitted through the wave-transparent composite material.

[0026] Preferably, the Beidou beacon module can send position information to the positioning receiving device through short messages;

[0027] The Beidou beacon module detects the intensity of the antenna beam in real time, and controls the time node for sending short messages by detecting the intensity of the antenna beam;

[0028] When the intensity of the antenna beam meets the preset condition, short messages are sent; when the intensity of the antenna beam does not meet the preset condition, short messages are not sent;

[0029] The positioning receiving device can adjust the sending period of the short messages of the Beidou beacon module through the short message information.

[0030] Preferably, the Beidou beacon module has the function of responding to multiple antenna beams;

[0031] When the antenna beam is locked and the power level is greater than or equal to 2, the Beidou beacon module sends short messages.

[0032] Preferably, the flight data recording system is applicable to any of the following situations: the flight data recorder falls in the desert, the flight data recorder falls on land, and the flight data recorder falls into the sea.

[0033] The present invention also provides a flight data recording method based on Beidou search and positioning. Based on the above flight data recording system based on Beidou search and positioning, it includes the following steps:

[0034] Address reporting step: The maintenance device loads the address information in real time and reports the loaded address information to the flight data recorder;

[0035] Data recording step: Receive flight data in real time through a flight data recorder and record the flight data;

[0036] Separation judgment step: Judge in real time whether the flight data recorder meets the separation condition. If so, make the flight data recorder perform automatic separation. If not, continue to receive and record flight data;

[0037] Position acquisition step: After separation, position the flight data recorder through the Beidou beacon module according to the emission period of the Beidou beacon module to obtain position information;

[0038] Emission judgment step: After obtaining the position information, judge whether the antenna beam intensity meets the Beidou emission condition. If so, send a short message containing the position information to the positioning receiving device through the Beidou beacon module. If not, after obtaining the position information again in the next cycle, judge whether the antenna beam intensity meets the Beidou emission condition;

[0039] Search judgment step: According to the position information received by the positioning receiving device, judge whether the situation of the location where the flight data recorder is located allows search. If so, conduct a search. If not, send a short message information to the Beidou beacon module through the positioning receiving device to adjust the emission period of the short message sent by the Beidou beacon module.

[0040] Preferably, in the emission judgment step, when the Beidou beacon module detects signals in more than 2 beams in real time, lock the beams with signals, and select the 2 strongest beams with signal intensity greater than or equal to 2 from the locked beams for sending.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. The present invention provides a flight data recording system based on Beidou search and positioning, which can receive the flight parameter data on the aircraft. After the aircraft crashes, by judging the aircraft crash signal, the flight data recorder is automatically triggered to pop out, facilitating the user to shorten the search and salvage time.

[0043] 2. The present invention obtains position information through the internal Beidou module in combination with the first Beidou antenna or the second Beidou antenna. After successful positioning, the internal Beidou module judges the antenna beam. When the antenna beam quality is good, a short message is sent to improve the success rate of the Beidou short message sending of the recorder.

[0044] 3. The positioning receiving device of the present invention can receive the short message information sent by the flight data recorder after the aircraft crashes, guiding the user to conduct search and salvage. When the sea condition is poor, the emission period of the short message sent by the internal Beidou of the flight data recorder is adjusted through the short message information to reduce the battery power consumption and extend the search time. Description of the Drawings

[0045] Other features, objects, and advantages of the present invention will become more apparent by reading the following detailed description of non - restrictive embodiments with reference to the accompanying drawings:

[0046] Figure 1 It is a schematic structural diagram of an aircraft with a flight data recording system based on Beidou search and positioning;

[0047] Figure 2 It is a schematic structural diagram of a flight data recorder;

[0048] Figure 3 It is a schematic principle diagram of a flight data recording system based on Beidou search and positioning.

[0049] As shown in the figure:

[0050] Flight data recorder 1 Beidou beacon module 105

[0051] Battery pack 101 First Beidou antenna 106

[0052] Positioning control module 102 Second Beidou antenna 107

[0053] Data receiving module 103 Maintenance device 2

[0054] Data recording module 104 Positioning receiving device 3 Detailed implementation manners

[0055] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0056] Example 1:

[0057] Such as Figures 1 - 3As shown in the figure, this embodiment provides a flight data recording system based on Beidou search and positioning, including: a flight data recorder 1, a maintenance device 2, and a positioning receiving device 3; a Beidou beacon module 105 is provided in the flight data recorder 1, and the flight data recorder 1 is used to receive and record flight data from the aircraft; the maintenance device 2 is connected to the flight data recorder 1 and is used to pre-set the address reported by the positioning device in the Beidou beacon module 105; the flight data recorder 1 can receive the crash signal of the aircraft, and when the flight data recorder 1 receives the crash signal, the flight data recorder 1 can actively separate from the aircraft body; after the flight data recorder 1 separates from the aircraft body, it can obtain its own position information through the Beidou beacon module 105 and send its own position information to the positioning receiving device 3 through the Beidou beacon module 105. The crash signal is detected by a crash sensor, and the crash sensor is connected to the flight data recorder 1.

[0058] When the flight data recorder 1 receives the crash signal, the separation mechanism inside the aircraft body pushes out the flight data recorder 1 and actively separates it from the aircraft body.

[0059] The flight data recorder 1 includes: a battery pack 101, a positioning control module 102, a data receiving module 103, a data recording module 104, and a Beidou beacon module 105. The overall structure of the flight data recorder 1 is a sheet structure; the overall density of the flight data recorder 1 is less than the density of water; when it falls into the sea, the flight data recorder 1 can float on the sea surface in a front or back posture. The flight data recorder 1 further includes: a cover plate and a base; the cover plate is arranged on the base, and an installation space is formed between the cover plate and the base; the battery pack 101, the positioning control module 102, the data receiving module 103, the data recording module 104, and the Beidou beacon module 105 are located in the installation space; a sealed waterproof pad is arranged between the cover plate and the base, and the sealed waterproof pad is used to prevent water from entering the interior of the flight data recorder 1. Both the cover plate and the base are made of wave-transparent composite materials; when the flight data recorder 1 floats on the sea surface, any Beidou antenna on the Beidou beacon module 105 can expose above the water surface, and the Beidou antenna signal of the Beidou beacon module 105 can be emitted through the wave-transparent composite material.

[0060] The battery pack 101 is connected to the positioning control module 102, and the battery pack 101 can supply power to the positioning control module 102; the Beidou beacon module 105 and the data receiving module 103 are connected to the positioning control module 102, and the positioning control module 102 can control the battery pack 101 to supply power to the Beidou beacon module 105 and the data receiving module 103; the data recording module 104 is connected to the data receiving module 103, and the data recording module 104 can record and maintain flight data; the Beidou beacon module 105 can send Beidou positioning signals containing position information to the positioning receiving device 3 through short messages. The Beidou beacon module 105 is provided with a first Beidou antenna 106 and a second Beidou antenna 107; the first Beidou antenna 106 and the second Beidou antenna 107 can obtain the position information of the flight data recorder 1.

[0061] The Beidou beacon module 105 can send position information to the positioning receiving device 3 through short messages; the Beidou beacon module 105 detects the intensity of the antenna beam in real time, and controls the time node of sending short messages by detecting the intensity of the antenna beam; when the intensity of the antenna beam meets the preset conditions, short messages are sent; when the intensity of the antenna beam does not meet the preset conditions, short messages are not sent. The positioning receiving device 3 can adjust the sending period of the short messages of the Beidou beacon module 105 through short message information.

[0062] The Beidou beacon module 105 has the function of responding to multiple antenna beams; when the antenna beam is locked and the power level is greater than or equal to 2, the Beidou beacon module 105 sends short messages.

[0063] When the Beidou beacon module 105 detects signals from more than 2 beams in real time, the beams with signals are locked, and the 2 strongest beams with signal intensity greater than or equal to 2 are selected from the locked beams for sending. In this embodiment, the Beidou beacon module 105 has the function of responding to 8 antenna beams.

[0064] In this embodiment, taking the case where the flight data recorder 1 falls into the sea as an example, the positioning receiving device 3 can adjust the sending period of the short messages of the Beidou beacon module 105 according to the sea conditions through short message information.

[0065] When the sea conditions are bad, short message information is sent to the Beidou beacon module 105 through the Beidou command machine, and when the Beidou beacon module 105 receives the short message information, the sending period is dynamically adjusted.

[0066] The flight data recording system is applicable to any of the following situations: the flight data recorder 1 falls into the desert, the flight data recorder 1 falls on land, and the flight data recorder 1 falls into the sea. The sending judgment mechanism when the flight data recorder 1 falls into the desert or on land is the same as that when it falls into the sea.

[0067] This embodiment belongs to the field of avionics technology and relates to a flight data recording system based on Beidou search and positioning. The recording system includes: a flight data recorder based on Beidou search and positioning, a maintenance device, and a positioning receiving device.

[0068] The implementation process is as follows: The flight data recorder receives flight-related data from the aircraft and records it; the maintenance device pre-sets the reporting address of the positioning device inside the Beidou module of the flight data recorder; when the aircraft crashes, it can actively separate from the aircraft body by judging the crash signal received by the receiver; after separation, the recorder floats on the sea surface, locates through the internal Beidou module, and judges the strength of the Beidou satellite RDSS signal in real time. When it is judged that the Beidou signal beam meets the emission requirements, the self-position information is sent to the positioning receiving device to meet the user's need for quickly finding the flight data recorder.

[0069] A flight data recording system based on Beidou search and positioning provided by this embodiment can solve the problem that traditional flight data recorders cannot quickly obtain flight data due to limited positioning capabilities after an aircraft accident, and reduce the costs of manual search and sea salvage.

[0070] This embodiment also provides a flight data recording method based on Beidou search and positioning. Based on the above flight data recording system based on Beidou search and positioning, it includes the following steps:

[0071] Address reporting step: The maintenance device 2 loads the address information in real time and reports the loaded address information to the flight data recorder 1;

[0072] Data recording step: The flight data recorder 1 receives flight data in real time and records the flight data;

[0073] Separation judgment step: Judge in real time whether the flight data recorder 1 meets the separation conditions. If so, the flight data recorder 1 is automatically separated. If not, continue to receive and record flight data;

[0074] Positioning acquisition step: After separation, according to the emission period of the Beidou beacon module 105, the flight data recorder 1 is positioned through the Beidou beacon module 105 to obtain position information;

[0075] Emission judgment step: After obtaining the position information, judge whether the antenna beam intensity meets the Beidou emission conditions. If so, the Beidou beacon module 105 sends a short message containing the position information to the positioning receiving device 3. If not, after obtaining the position information again in the next cycle, judge whether the antenna beam intensity meets the Beidou emission conditions;

[0076] When the Beidou beacon module 105 detects signals in more than 2 beams in real time, it locks the beams with signals and selects the 2 strongest beams with signal intensity greater than or equal to 2 from the locked beams for transmission;

[0077] Search and judgment step: According to the position information received by the positioning receiving device 3, judge whether the situation of the location where the flight data recorder 1 is located allows searching. If so, conduct the search. If not, send a short message to the Beidou beacon module 105 through the positioning receiving device 3 to adjust the transmission period of the short message sent by the Beidou beacon module 105.

[0078] Example 2:

[0079] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0080] This embodiment provides a flight data recording system based on Beidou search and positioning, including: a flight data recorder based on Beidou search and positioning, a maintenance device, and a positioning receiving device. The flight data recorder based on Beidou search and positioning is used to receive and record on-board data, separate from the airframe in the event of a flight accident, and send a short message containing location information to the positioning receiving device in remote deserts, open land, or floating on the sea; the maintenance device is used to load the positioning device address for the flight data recorder based on Beidou search and positioning, so that the flight data recorder reports a short message containing location information to this address; the positioning receiving device is used to receive the position of the flight data recorder based on Beidou search and positioning, and guide the search and rescue personnel to quickly find the flight data recorder.

[0081] The flight data recorder based on Beidou search and positioning includes a battery, a positioning control module, a data receiving module, a data recording module, and a Beidou module. Among them, the battery pack is used to supply power to the positioning control module after product separation. The positioning control module is used to control the battery pack to supply power to the Beidou beacon module and the data management module. The data receiving module is used to receive and manage on-board flight parameter data. The data recording module is used for the protection of flight parameter data. The Beidou module is used to send Beidou positioning signals by short message.

[0082] The structure of the flight data recorder is sheet-shaped, with an overall density less than that of water, having a certain floating ratio, and being able to float on the sea surface in a positive or negative posture when falling into the sea. The cover plate and the base have a sealed waterproof gasket to prevent water from entering the product interior. The external structure of the recorder is made of a wave-transparent composite material, and any internal antenna can leak out of the water surface when floating. The Beidou antenna signal of the Beidou module is emitted through the wave-transparent composite material as required.

[0083] When the Beidou module sends a message containing position information, it is necessary to judge the antenna beam. The beam represents the number of satellites that the Beidou beacon module can receive and detect, and the beam intensity represents the intensity of the received transmission signal. The product is designed with the function of responding to 8 beams. When the antenna beam is locked and the power level is greater than or equal to 2, Beidou short message transmission is carried out to improve the success rate of Beidou short message transmission of the recorder.

[0084] The maintenance device cannot realize the data maintenance function of the flight data recorder based on Beidou search and positioning, but can also load the reporting address of the internal Beidou module of the recorder, and can realize the maintenance self-detection of the internal Beidou beacon module.

[0085] The positioning receiving device can receive the short message information sent by the flight data recorder after the plane crash, and can also adjust the period of the internal Beidou short message transmission of the flight data recorder according to the sea conditions through the short message information, so as to reduce the battery power consumption and extend the search time.

[0086] A flight data recording system based on Beidou search and positioning provided by this embodiment can separate the internal recorder from the airframe after the plane crash. After the recorder falls into the sea, it can float on the sea surface and send a positioning signal, which is convenient for users to quickly search for and salvage the flight recorder.

[0087] A flight data recording system based on Beidou search and positioning provided by this embodiment is connected to the on-board power supply, avionics system and crash sensor. Among them, the flight data recording system based on Beidou search and positioning includes a flight data recorder 1, a maintenance device 2 and a positioning receiving device 3.

[0088] The flight data recorder 1 realizes the reception and recording of on-board flight parameter data. When the plane crashes and the on-board crash sensor outputs a trigger signal, the flight data recorder 1 automatically separates from the airframe. After separation, the internal battery of the recorder is started to supply power to the positioning control module. The positioning control module controls the power supply of the Beidou beacon module and sends a short message information containing position information through the satellite to the positioning receiving device 3. When the positioning transceiver device receives the short message information sent by the recorder of the crashed plane, it guides the user to search and salvage.

[0089] A flight data recording system based on Beidou search and positioning provided by this embodiment can receive on-board flight parameter data. After the plane crashes, by judging the plane crash signal, the flight data recorder is automatically triggered to pop out, which is convenient for users to shorten the search and salvage time.

[0090] Example 3:

[0091] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0092] Such as Figure 1As shown in the figure, this embodiment provides a flight data recording system based on Beidou search and positioning, which is composed of a flight data recorder 1, a maintenance device 2, and a positioning receiving device 3.

[0093] The flight data recorder 1 is powered by the on-board power supply, receives the flight data sent by the avionics system, and records it.

[0094] When the flight data recorder 1 can receive the crash trigger signal sent by the crash sensor during an aircraft crash, it will automatically separate from the aircraft body.

[0095] The maintenance device 2 is used for data maintenance of the flight data recorder, Beidou self-check, and Beidou reporting address loading.

[0096] The positioning receiving device 3 is used to receive the short message information sent by the flight data recorder and guide the user to search and salvage.

[0097] As Figure 2 shown, the flight data recorder 1 based on Beidou search and positioning includes a battery pack 101, a positioning control module 102, a data receiving module 103, a data recording module 104, a Beidou beacon module 105, a first Beidou antenna 106, and a second Beidou antenna 107. The battery pack 101 is connected to the positioning control module 102 to provide power for the positioning control module 102. The positioning control module 102 is connected to the data receiving module 103 and can control the power-off of the data receiving module in the positioning mode to save battery energy consumption. The positioning control module 102 is connected to the Beidou beacon module 105 to control the periodic power supply of the Beidou module and save battery energy consumption. The Beidou beacon module 105 is connected to the first Beidou antenna 106 and the second Beidou antenna 107 to complete the acquisition of the recorder's position information and complete the short message communication containing the position information. The data receiving module 103 is connected to the data recording module 104 for the recording and protection of flight parameter data.

[0098] As Figure 3As shown in the figure, the implementation process of the flight data recording system based on Beidou search and positioning is as follows: The on-board power supply provides power to the flight data recorder 1 based on Beidou search and positioning. The maintenance device 2 sets the reporting address for the flight data recorder 1 in advance. After the flight data recorder 1 is powered on, it realizes the reception and recording of flight data. When the aircraft crashes, the on-board crash sensor is triggered. After outputting a trigger signal, the flight data recorder 1 automatically separates from the airframe. The flight data recorder floats on the sea surface and is powered by the battery pack 101. Through the internal Beidou beacon module 105, in combination with the first Beidou antenna 106 or the second Beidou antenna 107, the position information is obtained. When the positioning is successful, the internal Beidou beacon module 105 judges the antenna beam. When the antenna beam quality is good, a short message is sent to improve the success rate of the Beidou short message sending of the recorder. The positioning and receiving device 3 can receive the short message information sent by the flight data recorder after the aircraft crash, and guide the user to search and salvage. When the sea conditions are poor, the short message information is used to adjust the period of the internal Beidou short message sending of the flight data recorder 1 to reduce the battery power consumption and extend the search time.

[0099] The present invention can solve the need for the traditional flight data recorder to quickly obtain flight data due to limited positioning ability after the aircraft crash, and reduce the manpower search and sea salvage costs.

[0100] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific implementation manners. Those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily with each other.

Claims

1. A flight data recording system based on Beidou search and positioning, characterized in that Comprising: A flight data recorder (1), a maintenance device (2), and a positioning receiving device (3); A Beidou beacon module (105) is provided inside the flight data recorder (1), and the flight data recorder (1) is used to receive and record flight data from the aircraft; The maintenance device (2) is connected to the flight data recorder (1) and is used to pre-set the address reported by the positioning device in the Beidou beacon module (105); The flight data recorder (1) can receive the crash signal of the aircraft. When the flight data recorder (1) receives the crash signal, the flight data recorder (1) can actively separate from the aircraft body; After the flight data recorder (1) separates from the aircraft body, it can obtain its own position information through the Beidou beacon module (105) and send its own position information to the positioning receiving device (3) through the Beidou beacon module (105).

2. The flight data recording system based on Beidou search and positioning according to claim 1, wherein The flight data recorder (1) includes: a battery pack (101), a positioning control module (102), a data receiving module (103), a data recording module (104), and a Beidou beacon module (105); The battery pack (101) is connected to the positioning control module (102), and the battery pack (101) can supply power to the positioning control module (102); The Beidou beacon module (105) and the data receiving module (103) are connected to the positioning control module (102), and the positioning control module (102) can control the battery pack (101) to supply power to the Beidou beacon module (105) and the data receiving module (103); The data recording module (104) is connected to the data receiving module (103), and the data recording module (104) can record and maintain flight data; The Beidou beacon module (105) can send a Beidou positioning signal containing position information to the positioning receiving device (3) through a short message.

3. The flight data recording system based on Beidou search and positioning according to claim 2, wherein A first Beidou antenna (106) and a second Beidou antenna (107) are provided on the Beidou beacon module (105); The first Beidou antenna (106) and the second Beidou antenna (107) can obtain the position information of the flight data recorder (1).

4. The flight data recording system based on Beidou search and positioning according to claim 2, characterized in that, The overall structure of the flight data recorder (1) is a sheet structure; The overall density of the flight data recorder (1) is less than the density of water; when it falls into the sea, the flight data recorder (1) can float on the sea surface in a front or back posture.

5. The flight data recording system based on Beidou search and positioning according to claim 4, characterized in that, The flight data recorder (1) further includes: a cover plate and a base; The cover plate is arranged on the base, and an installation space is formed between the cover plate and the base; The battery pack (101), the positioning control module (102), the data receiving module (103), the data recording module (104), and the Beidou beacon module (105) are located in the installation space; A sealing waterproof gasket is arranged between the cover plate and the base, and the sealing waterproof gasket is used to prevent water from entering the interior of the flight data recorder (1).

6. The flight data recording system based on Beidou search and positioning according to claim 5, characterized in that, Both the cover plate and the base are made of wave-transparent composite materials; When the flight data recorder (1) floats on the sea surface, any Beidou antenna on the Beidou beacon module (105) can emerge from the water surface, and the Beidou antenna signal of the Beidou beacon module (105) can be emitted through the wave-transparent composite material.

7. The flight data recording system based on Beidou search and positioning according to claim 1, characterized in that, The Beidou beacon module (105) can send position information to the positioning receiving device (3) via short message; The Beidou beacon module (105) detects the intensity of the antenna beam in real time and controls the time node of sending short messages by detecting the intensity of the antenna beam; When the intensity of the antenna beam meets the preset conditions, short messages are sent; when the intensity of the antenna beam does not meet the preset conditions, short messages are not sent; The positioning receiving device (3) can adjust the sending period of short messages of the Beidou beacon module (105) through short message information.

8. The flight data recording system based on Beidou search and positioning according to claim 7, characterized in that, The Beidou beacon module (105) has the function of responding to multiple antenna beams; When the antenna beam is locked and the power level is greater than or equal to 2, the Beidou beacon module (105) sends short messages.

9. A flight data recording method based on Beidou search and positioning, characterized in that, The flight data recording system based on Beidou search and positioning according to any one of claims 1 to 8 includes the following steps: Address reporting step: The maintenance device (2) loads the address information in real time and reports the loaded address information to the flight data recorder (1); Data recording step: The flight data recorder (1) receives flight data in real time and records the flight data; Separation judgment step: Judge in real time whether the flight data recorder (1) meets the separation conditions. If so, the flight data recorder (1) is automatically separated. If not, continue to receive and record flight data; Positioning acquisition step: After separation, the flight data recorder (1) is positioned according to the transmission period of the Beidou beacon module (105) to obtain position information; Transmission judgment step: After obtaining the position information, judge whether the antenna beam intensity meets the Beidou transmission conditions. If so, the Beidou beacon module (105) sends a short message containing the position information to the positioning receiving device (3). If not, after obtaining the position information again in the next period, judge whether the antenna beam intensity meets the Beidou transmission conditions; Search judgment step: According to the position information received by the positioning receiving device (3), judge whether the situation of the location where the flight data recorder (1) is located allows search. If so, conduct a search. If not, send short message information to the Beidou beacon module (105) through the positioning receiving device (3) to adjust the transmission period of short messages sent by the Beidou beacon module (105).

10. The flight data recording method based on Beidou search and positioning according to claim 9, characterized in that In the transmission judgment step, when the Beidou beacon module (105) detects signals on more than 2 beams in real time, the beams with signals are locked, and the 2 strongest beams with signal intensity greater than or equal to 2 are selected from the locked beams for sending.

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