Multi-band antenna adaptive control method for flight recorder and flight recorder

Abstract

The embodiment of the invention discloses a multi-band antenna adaptive control method for a flight recorder, and the method comprises the steps: detecting each antenna of the flight recorder after judging that the flight recorder is in a preset state, and determining the detection result of each antenna; determining attitude information of the flight recorder; wherein an antenna of the flight recorder covers a plurality of frequency bands; evaluating available antennas in the antennas according to the detection results of the antennas and the attitude information of the flight recorder; and determining a target antenna in the available antennas according to the evaluation results of the available antennas, determining an operation rule of the target antenna, and enabling the target antenna to work according to the operation rule.

Description

Technical Field

[0001] This application relates to the field of aircraft avionics technology, and particularly to a multi-band antenna adaptive control method for a flight recorder and a flight recorder. Background Art

[0002] On June 1, 2009, Flight AF447 on an intercontinental flight disappeared and crashed into the Atlantic Ocean two hours after takeoff. After two years of searching and spending 32 million euros, the black box was found until May 2, 2011. In March 2014, Malaysia Airlines Flight MH370 crashed in the Indian Ocean. The search lasted for 1,046 days, covering an area of about 120,000 square kilometers and costing nearly 160 million US dollars, but only three pieces of aircraft debris were found. These two aviation accidents caused a great shock globally, highlighting the limitations of traditional flight recorders, such as low survival rate after a maritime or extreme aviation accident and difficulty in search and recovery. This has prompted member states of the International Civil Aviation Organization (ICAO) and the global industry to systematically promote aircraft tracking and monitoring work. In 2015, ICAO proposed the concept of the Global Aeronautical Distress and Safety System (GADSS), which includes three phases: Aircraft Tracking (AT), Autonomous Distress Tracking (ADT), and Post-Flight Location and Recovery (PFLR). The PFLR phase requires the installation of a device approved by the operator's country to restore and timely provide flight recorder data. Among them, the Automatic Drogue Flight Recorder (ADFR) is one of the recommended items to meet the requirements. The ADFR is a key device for aircraft safety and can be used for accident analysis. ICAO recommends that the ADFR should include an Emergency Locator Transmitter (ELT) to send emergency signals with aircraft position information, such as homing radios at 121.5 MHz and 406 MHz. With the development of satellite communication and navigation technology in China, in order to increase the probability of the ADFR being discovered after falling, the future ADFR will integrate functions such as satellite communication and positioning, which requires the ADFR to be equipped with multiple-band antennas to achieve the transceiver of different functional signals.

[0003] However, the existing ADFR cannot perform reliable radio signal transceiver in any attitude and can only complete a single function, without the ability to simultaneously complete beacon positioning, wireless communication, positioning signal reception, and satellite communication functions. In addition, the falling attitude of the ADFR is usually related to the falling site, and different falling attitudes may cause problems such as antenna damage or function degradation of the AFDR, which is not conducive to radio signal transceiver. Summary of the Invention

[0004] The embodiments of this specification provide a multi-band antenna adaptive control method for a flight recorder and a flight recorder, which are used to solve the technical problem of how to adaptively control the signal transceiver of a flight recorder with multi-band antennas.

[0005] To solve the above technical problems, the embodiments of this specification provide the following technical solutions:

[0006] The embodiments of this specification provide a multi-band antenna adaptive control method for a flight recorder, and the method includes:

[0007] After determining that the flight recorder appears in a preset state, detecting each antenna of the flight recorder to determine the detection result of each antenna; and determining the attitude information of the flight recorder; wherein, the antennas of the flight recorder cover multiple frequency bands;

[0008] Evaluating the available antennas among each antenna according to the detection results of each antenna and the attitude information of the flight recorder;

[0009] Determining the target antenna among each available antenna according to the evaluation results of each available antenna, determining the operation rule of the target antenna, and making the target antenna work according to the operation rule.

[0010] Optionally, evaluating the available antennas among each antenna according to the detection results of each antenna and the attitude information of the flight recorder includes:

[0011] Determining the available antennas from each antenna according to the detection results of each antenna;

[0012] Evaluating each available antenna according to the detection results of each available antenna and the attitude information of the flight recorder.

[0013] Optionally, detecting each antenna of the flight recorder includes:

[0014] Powering each antenna of the flight recorder and detecting the functions of each antenna.

[0015] Optionally, the preset state includes a falling state;

[0016] Determining the attitude information of the flight recorder includes:

[0017] Determining the attitude information of the flight recorder according to the motion reference information of the flight recorder in the falling state.

[0018] Optionally, the method further includes:

[0019] If it is determined that the target antenna needs to be re-determined, re-determining the evaluation results of each available antenna;

[0020] Determining the target antenna among each available antenna according to the latest evaluation results of each available antenna, determining the operation rule of the new target antenna, and making the new target antenna work according to the operation rule.

[0021] Optionally, the method further includes:

[0022] Determine unavailable antennas according to the detection results of each antenna, and make the unavailable antennas not work;

[0023] And / or,

[0024] Determine redundant antennas among the available antennas according to the evaluation results of each available antenna, and make the redundant antennas stop working.

[0025] Optionally, determining the target antennas among the available antennas according to the evaluation results of each available antenna includes:

[0026] Classify the available antennas, and determine the target antennas among the available antennas in each category according to the evaluation results of each available antenna.

[0027] Optionally, the surface of the flight recorder has antennas installed by the common aperture technology.

[0028] An embodiment of this specification provides a flight recorder, which includes:

[0029] A self-check module, configured to detect each antenna of the flight recorder after determining that the flight recorder appears in a preset state, and determine the detection results of each antenna;

[0030] An attitude sensor module, configured to determine the attitude information of the flight recorder;

[0031] An antenna control module, configured to evaluate the available antennas among each antenna according to the detection results of each antenna and the attitude information of the flight recorder; determine the target antennas among the available antennas according to the evaluation results of each available antenna, determine the operating rules of the target antennas, and make the target antennas work according to the operating rules;

[0032] A multi-band antenna combination device, configured to work according to the operating rules.

[0033] Optionally, the multi-band antenna combination device includes antennas installed on each surface of the flight recorder, and multiple antennas are installed on each surface of the flight recorder by the common aperture technology.

[0034] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:

[0035] Evaluate the available antennas among the respective antennas based on the detection results of the respective antennas of the flight recorder and the attitude information of the flight recorder; determine the target antenna among the available antennas and the operating rules of the target antenna according to the evaluation results of the respective available antennas, and cause the target antenna to operate according to the operating rules, so as to adaptively adjust the working antenna according to different scenarios, and achieve reliable multi-band radio signal transmission and reception in any attitude. And while reducing power consumption, the interference between the signals of the respective antennas of the flight recorder is reduced, and at the same time, it has multiple functions such as wireless beacon positioning, wireless communication, positioning signal reception, and satellite communication, which is beneficial to discovering and retrieving the recorder. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly describe the drawings required for use in the description of the embodiments of this specification or the prior art. Obviously, the following only illustrates the drawings required for use in some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a schematic flowchart of a multi-band antenna adaptive control method for a flight recorder provided by the first embodiment of this specification.

[0038] Figure 2 It is a schematic diagram of the multi-band antenna adaptive control process in the first embodiment of this specification.

[0039] Figure 3 It is a schematic diagram of the antenna setting in the first embodiment of this specification.

[0040] Figure 4 It is a schematic diagram of the architecture of a flight recorder provided by the second embodiment of this specification. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In order to enable those skilled in the art to better understand the technical solutions in this specification, the following will clearly and completely describe the technical solutions in the embodiments of this specification in conjunction with the drawings. Obviously, the embodiments involved in the detailed description are only some embodiments of this application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the detailed description without creative efforts shall fall within the protection scope of this application.

[0042] The first embodiment of this specification (hereinafter referred to as "Embodiment 1") provides a multi-band antenna adaptive control method for a flight recorder. The execution subject of Embodiment 1 includes, but is not limited to, a terminal, a server, an operating system, or an application program. That is, the execution subject can be diverse and can be set, used, or transformed according to needs. Additionally, a third-party application program can assist the execution subject in executing Embodiment 1. For example, the method provided by Embodiment 1 can be executed by a server, and a corresponding application program can be installed on a terminal (which can be held by a user). Data can be transmitted between the terminal or the application program and the server to assist the server in executing the method provided by Embodiment 1.

[0043] Specifically, the execution subject of Embodiment 1 can be the flight recorder or a specific module in the flight recorder, such as the control module in the flight recorder.

[0044] Reference Figure 1 and Figure 2 , the multi-band antenna adaptive control method for a flight recorder provided by Embodiment 1 includes:

[0045] S101: After determining that the flight recorder has entered a preset state, detect each antenna of the flight recorder to determine the detection results of each antenna; and determine the attitude information of the flight recorder; wherein, the antennas of the flight recorder cover multiple frequency bands;

[0046] In Embodiment 1, the preset state can be set. The preset state can be set or changed according to needs, and Embodiment 1 is not limited. For example, in actual situations, when the aircraft (including but not limited to airplanes) is in danger or other specific situations, the flight recorder will be separated from the aircraft and fall through methods such as ejection. Then, the falling state can be set as the preset state, that is, when the flight recorder falls, it is determined that the flight recorder has entered the preset state.

[0047] If it is determined that the flight recorder has entered a preset state, then detect each antenna of the flight recorder to determine the detection results of each antenna. The flight recorder can be configured with multiple or various antennas, and the antennas of the flight recorder can cover multiple frequency bands. Embodiment 1 is not limited to the number, type, or frequency band of the antennas configured for the flight recorder.

[0048] In Embodiment 1, detecting each antenna of the flight recorder can include: supplying power to each antenna of the flight recorder and detecting the functions of each antenna. That is, supply power to each antenna of the flight recorder to enable each antenna to start working, so as to perform function detection on each antenna, including checking the functional integrity of each antenna. The content of the function detection can be set according to needs. For example, the received signal strength can be detected. Embodiment 1 is not limited to the specific content of the function detection.

[0049] Preferably, a power supply module can be preset in the flight recorder, and the execution subject of the first embodiment can control the power supply module to supply power to each antenna.

[0050] By detecting each antenna of the flight recorder, the detection results of each antenna can be determined and recorded. The detection results of each antenna include but are not limited to the states of each antenna (including functional states, such as the actual received signal strength of each antenna). The execution subject of the first embodiment can obtain the data of each antenna to determine the detection results of each antenna.

[0051] In the first embodiment, the attitude information of the flight recorder can be determined. As mentioned above, the flight recorder may be in various attitudes during the falling process. Then determining the attitude information of the flight recorder may include: determining the attitude information of the flight recorder according to the motion reference information of the flight recorder in the falling state. The attitude information is, for example, which side of the flight recorder is facing down or towards the ground during the falling process, or which side of the flight recorder may contact the water surface or be submerged in the water after the flight recorder falls, or which side of the flight recorder may contact the ground or be close to the ground after the flight recorder falls.

[0052] Among them, the motion reference information may include various information that helps to determine the attitude of the flight recorder during the falling process, including but not limited to acceleration information and / or inclination information. Corresponding devices can be preset in the flight recorder, such as an accelerometer, an inclination sensor, etc., and the execution subject of the first embodiment can obtain the acceleration information and inclination information of the flight recorder from these devices.

[0053] S103: Evaluate the available antennas among each antenna according to the detection results of each antenna and the attitude information of the flight recorder;

[0054] In the first embodiment, according to the detection results of each antenna and the attitude information of the flight recorder, the available antennas among each antenna can be evaluated. Among them, evaluating the available antennas among each antenna according to the detection results of each antenna and the attitude information of the flight recorder may include: determining the available antennas from each antenna according to the detection results of each antenna; evaluating each available antenna according to the detection results of each available antenna and the attitude information of the flight recorder.

[0055] Specifically, according to the detection results of each antenna, available antennas and unavailable antennas can be determined from each antenna. For example, according to the detection results of each antenna, it can be judged which antennas are malfunctioning or failed. The antennas that are malfunctioning or failed are unavailable antennas, and the antennas other than the antennas that are malfunctioning or failed are used as available antennas. And, the unavailable antennas can be made not to work or stop working.

[0056] After determining each available antenna, the evaluation of each available antenna can be performed according to the detection results of each available antenna and the attitude information of the flight recorder, the evaluation results of each available antenna can be determined, and each available antenna can be sorted according to the evaluation results. Specifically, the detection results of each available antenna and the attitude information of the flight recorder can be integrated to rate the reliability of each available antenna, and each available antenna can be sorted according to the reliability rating.

[0057] S105: Determine the target antenna among each available antenna according to the evaluation results of each available antenna, determine the operating rules of the target antenna, and make the target antenna work according to the operating rules.

[0058] In the first embodiment, the target antenna can be determined from the available antennas according to the evaluation results of each available antenna. For example, one or more antennas with the top-ranked evaluation results among the available antennas are used as the target antennas (i.e., the available antennas with high reliability or the most reliable ones are the target antennas). Generally, the frequency bands of the determined target antennas cover the frequency bands required for various functions of the flight recorder. For example, the flight recorder needs to have functions such as wireless beacon positioning (121.5 / 406 MHz), wireless communication (800 MHz), positioning signal reception, and satellite communication function (2 GHz). Then, the target antennas cover the frequency bands of these functions, which means that each target antenna can correspond to performing at least one function or at least one frequency band signal. In this way, no matter which function needs to be performed, it can be executed by the target antenna corresponding to this function (or the target antenna corresponding to the frequency band of this function), so that multiple functions including wireless beacon positioning (121.5 / 406 MHz), wireless communication (800 MHz), positioning signal reception, and satellite communication function (2 GHz) can be executed simultaneously.

[0059] Specifically, determining the target antenna among each available antenna according to the evaluation results of each available antenna can include: classifying the available antennas, and determining the target antenna in each category of available antennas according to the evaluation results of each available antenna. That is, the available antennas are divided into several categories, and the target antenna is determined in each category of available antennas. For example, for any category of available antennas, one or more antennas with the top-ranked evaluation results in this category of available antennas are used as the target antennas in this category of available antennas.

[0060] Preferably, available antennas of different categories can correspond to different functions or frequency band signals, or each category of available antennas can perform at least one function or correspond to at least one frequency band signal, such as wireless beacon positioning (121.5 / 406 MHz), wireless communication (800 MHz), positioning signal reception, and satellite communication function (2 GHz). Since each category of available antennas determines a target antenna, it means that each target antenna can correspondingly perform at least one function or correspond to at least one frequency band signal. In this way, no matter what function needs to be performed, it can be executed by the target antenna corresponding to this function (or the target antenna corresponding to the frequency band of this function), so that multiple functions including wireless beacon positioning (121.5 / 406 MHz), wireless communication (800 MHz), positioning signal reception, and satellite communication function (2 GHz) can be executed simultaneously.

[0061] After determining the target antenna, the operating rules corresponding to the target antenna can also be determined. If there are multiple target antennas, the operating rules corresponding to each target antenna can be determined. Among them, the operating rules include but are not limited to the types and / or contents and / or frequencies of the signals transmitted and received. The role of the operating rules is to guide how the target antenna operates, but the specific content of the operating rules is not limited in the first embodiment.

[0062] Since the target antenna and the operating rules of the target antenna are determined, the target antenna can work according to its corresponding operating rules, including making the target antenna perform the radio signal transmission and reception work corresponding to the functions required by the flight recorder according to its corresponding operating rules, such as the radio signal transmission and reception work of multiple functions such as wireless beacon positioning (121.5 / 406 MHz), wireless communication (800 MHz), positioning signal reception, and satellite communication function (2 GHz). Preferably, the execution entity of the first embodiment can make the target antenna work according to the operating rules by sending signals or instructions to the target antenna.

[0063] As mentioned above, the flight recorder can be configured with multiple or various antennas. After determining the target antenna, the other available antennas except the target antenna are used as redundant antennas. Therefore, the redundant antennas are determined from the available antennas according to the evaluation results of each available antenna. And the redundant antennas can be made not to work or stop working.

[0064] In actual situations, the flight recorder may undergo state changes. For example, its attitude may change during a fall. Therefore, after the flight recorder exhibits a preset state, its state can be continuously monitored, including monitoring the attitude information of the flight recorder, and then determining whether it is necessary to re-determine the target antenna. For example, the accelerometer and / or inclinometer sensor of the flight recorder continue to operate. If it is determined based on the acceleration information and / or inclinometer information that the attitude information of the flight recorder has changed and meets the condition for re-determining the target antenna (such as the flight recorder has flipped and the downward-facing surface has changed), then it is determined that it is necessary to re-determine the target antenna.

[0065] If it is determined that it is necessary to re-determine the target antenna, then re-determine the evaluation results of each available antenna. That is, re-evaluate each available antenna based on the detection results of each available antenna and the current attitude information of the flight recorder to determine the latest evaluation results of each available antenna. Determine the target antenna among each available antenna according to the latest evaluation results of each available antenna, determine the operating rules corresponding to the new target antenna, and make the new target antenna operate according to its corresponding operating rules. For the specific method of evaluation and determination of the new target antenna and operating rules, refer to the foregoing content and will not be elaborated here.

[0066] It should be noted that the newly determined target antenna may be the same as or different from the original target antenna, and Embodiment 1 is not limited.

[0067] The continuous monitoring of the flight recorder can continue until the flight recorder ends the preset state, such as when the flight recorder stops falling.

[0068] As mentioned above, the flight recorder can be configured with multiple or various antennas. Preferably, the surface of the flight recorder has antennas installed through the common aperture technology. For example Figure 3 As shown, each surface of the flight recorder has antennas installed through the common aperture technology, that is, different frequency band common aperture antennas are installed on each surface. Among them, two surfaces both install 121.5 MHz and 406 MHz common aperture antennas, two surfaces install 406 MHz and 2 GHz common aperture antennas, and two surfaces install 121.5 MHz and 2 GHz common aperture antennas. In addition, separate antennas can also be set on the surface of the flight recorder. For example Figure 3 800 MHz antennas are also separately set on some surfaces of the flight recorder. This antenna arrangement ensures that the flight recorder has multiple functions such as wireless beacon positioning (121.5 / 406 MHz), wireless communication (800 MHz), positioning signal reception, and satellite communication function (2 GHz). In this case, the target antenna determined above may be either a common aperture antenna or a separately set antenna.

[0069] Embodiment 1 can achieve the following beneficial effects:

[0070] Evaluate the available antennas among the respective antennas based on the detection results of the antennas of the flight recorder and the attitude information of the flight recorder; determine the target antenna among the available antennas and the operating rules of the target antenna according to the evaluation results of the available antennas, and cause the target antenna to operate according to the operating rules. In this way, it is possible to comprehensively consider the state of each antenna of the flight recorder and the attitude of the flight recorder, specifically determine the optimal target antenna, use the target antenna as the working antenna, and operate according to the operating rules, which can not only improve the determination efficiency of the target antenna, but also ensure that the target antenna is the optimal antenna suitable for the current scenario, thereby ensuring the working function and effect of the target antenna, such as reliable radio signal transceiver function and effect, which is beneficial to improving the recovery efficiency and success rate of the flight recorder, facilitating the timely discovery and recovery of the flight recorder, and then enabling work such as accident investigation.

[0071] Since the optimal target antenna is determined by comprehensively considering the detection results of the antennas of the flight recorder and the attitude of the flight recorder, and the target antenna can be re-determined according to the changing needs of the state of the flight recorder, it realizes the adaptive adjustment of the optimal target antenna according to different scenarios (such as scenario changes caused by attitude changes), ensuring that the optimal target antenna can be accurately determined in any attitude of the flight recorder, thereby improving the determination efficiency and effect of the target antenna, and finally enabling reliable multi-band radio signal transceiver through the target antenna in any attitude of the flight recorder, which is beneficial to searching for the flight recorder and conducting accident investigation, and avoiding the antenna function failure and damage caused by the uncertainty of the falling attitude of the flight recorder, resulting in the search work missing the beacon communication window.

[0072] Aiming at the problems in the prior art that there are multiple antennas coexisting in a limited space and reliable radio signal transceiver cannot be performed in any attitude when the flight recorder transceives multi-band radio signals, in the first embodiment, an antenna combination design of multi-band common aperture antennas is set on each surface of the flight recorder. Based on the multi-band antenna combination and layout method of the common aperture technology, different frequency band antennas are integrated using the common aperture technology, and the antennas can be symmetrically installed on the outer shell of the flight recorder, which not only saves space and solves the problem of coexistence of multiple antennas in the limited space of the flight recorder, but also can sense the state of the flight recorder (including the falling attitude) after the flight recorder appears in a preset state, predict in advance which side of the flight recorder may touch the ground or enter the water, etc., and adaptively determine and adjust the target antenna to ensure that the determined target antenna is not on the side where the ground touch or water entry may occur, etc., so that the target antenna is not likely to touch the ground or enter the water, etc., better ensuring the working effect of the target antenna, and realizing reliable radio signal transceiver effect in any attitude of the flight recorder, and solving the problem of reliable transceiver of multi-frequency information in any attitude in the limited space of the flight recorder.

[0073] In the first embodiment, since multiple antennas or multiple types of antennas are configured for the flight recorder to cover multiple frequency bands, the transmission and reception of multiple functional signals can be achieved, and it has multiple functions such as wireless beacon positioning, wireless communication, positioning signal reception, and satellite communication. In particular, since multi-band common-aperture antennas can be set on each surface of the flight recorder, no matter what attitude the flight recorder is in and which surface touches the ground or enters the water, etc., there are still antennas on other surfaces that can be used as target antennas, realizing the redundant layout of the antennas and ensuring the working effect of the antennas. Moreover, since there are multi-band common-aperture antennas on each surface of the flight recorder, no matter which surface the determined target antenna or the target antenna actually performing the function of the flight recorder is located on, through the respective target antennas on this surface, multiple functions such as wireless beacon positioning (121.5 / 406 MHz), wireless communication (800 MHz), positioning signal reception, and satellite communication function (2 GHz) can be achieved, ensuring the multi-functional working effect of the target antenna.

[0074] In particular, in the first embodiment, the available antennas are reliability rated and sorted through antenna function detection and flight recorder attitude perception, and the target antennas with high reliability are preferentially used for work, while the work of unavailable antennas or redundant antennas is stopped, improving the reliability of antenna signal transmission and reception, reducing the interference between signals, and reducing the antenna power consumption.

[0075] In the first embodiment, the target antennas cover the frequency bands required for various functions of the flight recorder, or the available antennas can be classified, each category corresponding to the functions required by the flight recorder, and the target antennas are determined among the available antennas in each category, ensuring that no matter what attitude the flight recorder is in, there are corresponding target antennas to execute according to the operation rules for various functions, ensuring the multi-functional working effect of the target antennas.

[0076] The second embodiment of this specification (hereinafter referred to as "Embodiment Two") provides a flight recorder that can execute the method provided in Embodiment One and can be used as the execution subject of Embodiment One.

[0077] Reference Figure 4 , the flight recorder provided in Embodiment Two may include:

[0078] A self-check module, configured to detect each antenna of the flight recorder after determining that the flight recorder appears in a preset state, and determine the detection result of each antenna;

[0079] An attitude sensor module, configured to determine the attitude information of the flight recorder;

[0080] An antenna control module, configured to evaluate available antennas among all antennas according to the detection results of each antenna and the attitude information of the flight recorder; determine target antennas among the available antennas according to the evaluation results of the available antennas, determine the operating rules of the target antennas, and cause the target antennas to operate according to the operating rules;

[0081] A multi-band antenna combination device, configured to operate according to the operating rules.

[0082] The following is an exemplary description of the working content of each module of the flight recorder provided in Embodiment 2:

[0083] Self-check module

[0084] The self-check module can be used to detect each antenna of the flight recorder, for example, check the functional integrity of each antenna by power-on, record the received signal strength of each antenna (which belongs to the detection result), and transmit the state of each antenna (which belongs to the detection result) to the antenna control module.

[0085] Attitude sensor module

[0086] The attitude sensor module can be used to sense the attitude of the flight recorder, determine the attitude information of the flight recorder, and transmit the attitude information to the antenna control module. Sensing the attitude of the flight recorder, for example: using the measurement data of the acceleration and tilt sensors to determine which side of the flight recorder is facing down, that is, the side that is completely immersed in water or facing the ground.

[0087] Antenna control module

[0088] The antenna control module can be used to receive the inputs from the self-check module and the attitude sensor module, determine available antennas by synthesizing the detection results of each antenna and the attitude information of the recorder, and evaluate the available antennas, including rating the reliability of each available antenna to determine each target antenna (high-reliability antenna).

[0089] In addition, the antenna control module can send commands according to the radio signals sent by the central main control unit of the flight recorder (that is, the flight recorder also includes a central main control unit, and the radio signal sending command represents the functions that the flight recorder currently needs to execute, including what signals need to be transmitted and received), and generate an antenna control signal according to the principle of preferentially using high-reliability antennas (i.e., target antennas) and stopping the operation of low-reliability redundant antennas, and output the antenna control signal to the multi-band antenna combination device. The antenna control signal represents which antenna to use (i.e., the target antenna corresponding to the currently required function) to transmit and receive what signals (i.e., the operating rules corresponding to the target antenna).

[0090] Multi-band antenna combination device

[0091] The multi-band antenna combination device can be used to receive the input of the antenna control module, and use the antenna control signal to represent the antenna to transmit and receive corresponding signals (that is, make the target antenna work according to the corresponding operating rules), realizing the radio signal transmission and reception work of using a highly reliable antenna to complete the required functions. The multi-band antenna combination device includes antennas installed on each surface of the flight recorder, and multiple antennas are installed on each surface of the flight recorder through the common aperture technology. The multi-band antenna combination device is, for example Figure 3 As shown, different frequency band common aperture antennas are installed on each surface of the flight recorder (refer to the description of Embodiment 1 Figure 3 ), while realizing redundant design, ensuring that in different falling postures, each function has a corresponding target antenna to execute, and can reliably transmit and receive radio signals.

[0092] The connection relationship or data transmission relationship of each module in Embodiment 2 can be referred to Figure 4 , and each module can be connected in a suitable manner. The content not detailed in Embodiment 1 and Embodiment 2 can be referred to each other. Embodiment 2 can achieve the same beneficial effects as Embodiment 1, and the above embodiments can be used in combination.

[0093] The above is only for the embodiments of this specification and is not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A multi-band antenna adaptive control method for a flight recorder, characterized in that: The method comprises: After determining that the flight recorder is in a preset state, each antenna of the flight recorder is detected to determine the detection result of each antenna; and determining the attitude information of the flight recorder; wherein the antenna of the flight recorder covers multiple frequency bands; Evaluate available antennas among the antennas based on detection results of the antennas and attitude information of the flight recorder; A target antenna among the available antennas is determined according to the evaluation results of the available antennas, an operation rule of the target antenna is determined, and the target antenna is made to operate according to the operation rule.

2. The method according to claim 1, characterized in that Based on the detection results of each antenna and the attitude information of the flight recorder, the available antennas in each antenna are evaluated, including: Determine an available antenna from among the antennas according to the detection results of the antennas; Each available antenna is evaluated according to the detection result of each available antenna and the attitude information of the flight recorder.

3. The method according to claim 1, characterized in that Testing of each flight recorder antenna includes: Power is supplied to each antenna of the flight recorder and the function of each antenna is tested.

4. The method according to claim 1, characterized in that The preset state includes a falling state; Determine the attitude information of the flight recorder including: The attitude information of the flight recorder is determined according to the motion reference information of the flight recorder in the falling state.

5. The method according to claim 1, characterized in that The method further comprises: If it is determined that the target antenna needs to be re-determined, the evaluation results of each available antenna are re-determined; A target antenna among the available antennas is determined according to the latest evaluation results of the available antennas, an operation rule of a new target antenna is determined, and the new target antenna is made to operate according to the operation rule.

6. The method according to claim 1, characterized in that The method further comprises: Determine an unavailable antenna according to the detection results of each antenna, and make the unavailable antenna inoperative; and / or, A redundant antenna among the available antennas is determined according to the evaluation results of the available antennas, and the redundant antenna is stopped from working.

7. The method according to claim 1, characterized in that According to the evaluation results of each available antenna, the target antenna among the available antennas is determined to include: The available antennas are classified into categories, and a target antenna is determined from the available antennas in each category according to evaluation results of the available antennas.

8. The method according to claim 1, characterized in that The surface of the flight recorder has an antenna mounted by co-aperture technology.

9. A flight recorder, characterized in that: The flight recorder comprises: A self-test module is used to detect each antenna of the flight recorder after determining that the flight recorder is in a preset state, and determine the detection result of each antenna; An attitude sensor module, used to determine the attitude information of the flight recorder; The antenna control module is used to evaluate the available antennas among the antennas according to the detection results of the antennas and the attitude information of the flight recorder; determine the target antenna among the available antennas according to the evaluation results of the available antennas, determine the operation rules of the target antenna, and make the target antenna work according to the operation rules; A multi-band antenna combination device is used to work according to the operating rules.

10. The flight recorder according to claim 9, characterized in that: The multi-band antenna combination device includes antennas installed on each surface of the flight recorder, and multiple antennas are installed on each surface of the flight recorder through the common aperture technology.

Images