Method, electronic device and storage medium for detecting magnetic variation of airport runway

Abstract

The embodiment of the present invention relates to a method, electronic device and storage medium for detecting magnetic variation of an airport runway. The method comprises: measuring the magnetic heading data of the runway at fixed time intervals and distance intervals along the centerline of the runway in a first direction of the runway and a second direction opposite to the first direction, respectively, calculating the magnetic track angle along the first direction of the runway and the magnetic track angle along the second direction of the runway based on the runway magnetic heading data, obtaining the magnetic variation from the first end to the second end of the runway and the magnetic variation from the second end to the first end, and then calculating the magnetic variation of the airport runway. The method, electronic device and storage medium for detecting magnetic variation of an airport runway in the embodiment of the present invention can quickly and accurately obtain the magnetic variation data of the airport runway, can use the correct magnetic variation data of the airport runway to produce accurate flight verification results, and the correct magnetic variation data of the airport runway can also be used to confirm the magnetic variation data of navigation equipment around the runway.

Description

Technical Field

[0001] The invention belongs to the field of civil aviation flight verification and relates to a method, electronic equipment and storage medium for detecting magnetic variation of an airport runway. Background Art

[0002] There is a natural magnetic field around the earth - the geomagnetic field. The magnetic north pole is close to the geographic north pole, and the magnetic south pole is close to the geographic south pole. However, the positions of the geomagnetic poles are not consistent with the earth's poles. The geomagnetic axis connecting the magnetic north pole and the magnetic south pole intersects the earth's axis at an angle of about 11.5°. True north is the direction along the earth's surface toward the geographic north pole, while magnetic north is the direction indicated by the north end of the magnetic needle. Since the magnetic needle is also affected by the local magnetic force, the magnetic north line in various places often deviates from the true north line, and the north end of the magnetic needle does not necessarily point to the true north.

[0003] The angle between magnetic north and true north is called magnetic declination, which can be east or west. If the magnetic north is east of true north, it is called east magnetic declination, which is written as E or a positive sign "+"; if the magnetic north is west of true north, it is called west magnetic declination, which is written as W or a negative sign "-". The value range of magnetic declination is 0°-180°.

[0004] The magnitude of the magnetic declination to the east and west and its angle vary from place to place. Generally, the higher the latitude, the greater the magnetic declination value, and it also changes over time. Since the position of the magnetic north pole is constantly changing, from 1948 to 2007, the magnetic north pole moved northwest at a speed of 55 kilometers per year, causing the magnetic declination in various places to change slightly every year. The annual change in magnetic declination is called the annual declination.

[0005] At present, civil aviation flights are usually operated based on flight procedures. The angle of the route in the flight procedures used by the aircraft is expressed in terms of the magnetic track angle. The angle measured clockwise from the north end of the magnetic meridian to the direction of the track line is the magnetic track angle. When the aircraft glides in a straight line on the ground, the magnetic track of the aircraft is equal to the magnetic heading during the taxiing period. In the field of flight procedure design, the magnetic track angle is obtained through the true track angle and the magnetic deviation. The magnetic track angle is equal to the true track angle minus (± magnetic deviation). The runway or navigation station position of the airport is fixed, so the true track angle based on the longitude and latitude coordinates at both ends of the runway is the only one determined, and the only factor affecting the magnetic track angle is the magnetic deviation. If the magnetic deviation is inaccurate, it will affect the conversion of the magnetic track angle. If the aircraft flies according to an inaccurate magnetic track angle, the actual track will deviate from the expected track.

[0006] In the prior art, the airport runway orientation and magnetic variation measurement usually includes the airport reference point measurement, the runway entrance coordinate point measurement at both ends, the runway true north orientation measurement, the magnetic north orientation measurement, the runway magnetic variation and annual variation rate (if any), etc., which require special equipment and personnel to reach the corresponding points in the airport for surveying and calculation. The plane position adopts GNSS observation technology, and the coordinate system generally adopts WGS-84 or CGCS2000 coordinate system. The surveying operation is relatively complicated, time-consuming and laborious. At the same time, the existing measurement equipment in my country has the situation of slow update, low measurement accuracy and poor reliability. Considering the influencing factors such as my country's vast territory, complex terrain, and large-scale infrastructure, most of the domestic airport magnetic variation measurement models refer to the foreign global magnetic variation model, and do not conduct field measurements. The maximum error of magnetic variation mapping calculation data is more than 3°.

[0007] Safety is the lifeline of the civil aviation industry. In order to promote the safe development of the industry, there is an urgent need for a method and means to regularly and quickly detect the runway magnetic variation, dynamically monitor the runway magnetic variation of airports (especially airports with unstable magnetic fields), and obtain the latest runway magnetic variation data. Summary of the invention

[0008] In order to solve the technical problem of rapid, accurate and dynamic monitoring of the magnetic variation of an airport runway, an embodiment of the present invention provides a method, an electronic device and a storage medium for detecting the magnetic variation of an airport runway.

[0009] According to a first aspect of the present invention, a method for detecting magnetic variation of an airport runway is provided, the method comprising: measuring magnetic heading data of the runway at fixed time intervals by a calibration aircraft along a first direction of the runway and along a centerline of the runway from a first end of the runway to a second end of the runway, obtaining a first magnetic heading data set of the runway, and measuring magnetic heading data of the runway at fixed distance intervals, obtaining a second magnetic heading data set of the runway; calculating an average magnetic heading along the first direction of the runway as a magnetic track angle along the first direction of the runway based on the first magnetic heading data set of the runway and the second magnetic heading data set of the runway; calculating a magnetic variation from the first end to the second end of the runway based on the magnetic track angle along the first direction of the runway and the true track angle along the first direction of the runway; Along the second direction of the runway, along the centerline of the runway from the second end of the runway to the first end of the runway, the runway magnetic heading data is measured by the calibration aircraft at fixed time intervals to obtain a third runway magnetic heading data set, and the runway magnetic heading data is measured at fixed distance intervals to obtain a fourth runway magnetic heading data set; based on the third magnetic heading data set and the fourth magnetic heading data set, the average magnetic heading along the second direction of the runway is calculated as the magnetic track angle along the second direction of the runway; based on the magnetic track angle along the second direction of the runway and the true track angle along the second direction of the runway, the magnetic difference from the second end to the first end of the runway is calculated; based on the magnetic difference from the first end to the second end of the runway and the magnetic difference from the second end to the first end of the runway, the magnetic difference of the airport runway is calculated.

[0010] In some embodiments, the runway magnetic heading data includes ground vector speed, time, and longitude and latitude data of the calibration aircraft.

[0011] In certain embodiments, the ground vector velocity includes magnetic heading and velocity.

[0012] In some embodiments, calculating the average magnetic heading along the first direction of the runway as the magnetic track angle along the first direction of the runway based on the first magnetic heading data set of the runway and the second magnetic heading data set of the runway includes:

[0013] Calculating a first average magnetic heading along a first direction of the runway based on the first magnetic heading data set of the runway;

[0014] Calculating a second average magnetic heading along a first direction of the runway based on the runway second magnetic heading data set;

[0015] The average magnetic heading along the first direction of the runway is calculated based on the first average magnetic heading and the second average magnetic heading.

[0016] In some embodiments, calculating the average magnetic heading along the second direction of the runway as the magnetic track angle along the second direction of the runway based on the third magnetic heading data set of the runway and the fourth magnetic heading data set of the runway includes:

[0017] Calculating a third average magnetic heading of the runway along a second direction of the runway based on the third magnetic heading data set of the runway;

[0018] Calculating a fourth average magnetic heading of the runway along a second direction of the runway based on the fourth magnetic heading data set of the runway;

[0019] The average magnetic heading along the second direction of the runway is calculated based on the third average magnetic heading of the runway and the fourth average magnetic heading of the runway.

[0020] In some embodiments, the true track angle along the first direction of the runway and the true track angle along the second direction of the runway are calculated based on the longitude and latitude of the first end and the second end of the runway.

[0021] In some embodiments, the magnetic difference from the first end to the second end of the runway is equal to the true track angle along the first direction of the runway minus the magnetic track angle along the first direction of the runway;

[0022] The magnetic difference from the second end to the first end of the runway is equal to the true track angle along the second direction of the runway minus the magnetic track angle along the second direction of the runway.

[0023] In some embodiments, the magnetic variation of the airport runway is equal to the average of the magnetic variation from the first end to the second end of the runway and the magnetic variation from the second end to the first end of the runway.

[0024] According to a second aspect of the present invention, an electronic device is provided, comprising: a processor; and a memory storing instructions, wherein when the instructions are executed by the processor, the device is prompted to execute the method described above.

[0025] According to a third aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores machine-readable instructions, and when the instructions are executed by the machine, the machine executes the method as described above.

[0026] Beneficial effects of the present invention:

[0027] The method, electronic device and storage medium for detecting airport runway magnetic variation of the embodiments of the present invention can quickly and accurately obtain airport runway magnetic variation data, can use the correct airport runway magnetic variation data to produce accurate flight verification results, and the correct airport runway magnetic variation data can also be used to confirm the magnetic variation data of navigation equipment around the runway. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flow chart of a method for detecting magnetic variation of an airport runway proposed by an embodiment of the present invention;

[0029] Figure 2 is a block diagram of an attitude and heading reference system AHRS proposed in one embodiment of the present invention;

[0030] Figure 3 is a block diagram of an electronic device suitable for implementing an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. However, those skilled in the art will appreciate that the present invention is not limited to the accompanying drawings and the following embodiments. As described herein, the term "including" and its various variations may be understood as open-ended terms, which mean "including but not limited to". The term "based on" and similar expressions may be understood as "at least based on". Expressions such as the terms "first", "second", and "third" are only used to distinguish different features and have no substantive meaning.

[0032] One embodiment of the present invention provides a method for detecting magnetic variation of an airport runway, such as Figure 1 As shown, the method comprises the following steps:

[0033] S101, along a first direction of the runway, along a centerline of the runway from a first end of the runway to a second end of the runway, by measuring the runway magnetic heading data at fixed time intervals by a calibration aircraft to obtain a first runway magnetic heading data set, and measuring the runway magnetic heading data at fixed distance intervals to obtain a second runway magnetic heading data set

[0034] The embodiment of the present invention preferably uses a verification aircraft Citation 560XLS+ aircraft to detect the magnetic variation of the airport runway. The aircraft is equipped with a Rockwell Collins ProLine21 avionics system with an integrated flight information system IFIS. The ProLine21 avionics system is a complete system containing integrated flight instruments, autopilots and navigation systems. The ProLine21 avionics system includes two attitude and heading reference systems AHRS (captain side and co-pilot side), such as Figure 2 As shown in the figure, the two attitude and heading reference systems AHRS have independent functions and backup each other. If the attitude and heading of one side fails, the attitude and heading of the other side can be selected to drive the system on that side. Each AHRS is an independent system composed of an attitude and heading computer AHC, a magnetic flux detector assembly FDU and an external compensation assembly ECU. Among them, the attitude and heading computer AHC senses the aircraft's attitude, heading and three-axis rate / acceleration; the magnetic flux detector assembly FDU provides magnetic flux measurement data to the attitude and heading computer AHC; the external compensation assembly ECU provides compensation for installation errors and magnetic flux detector assembly FDU errors for the attitude and heading computer AHC. The data information is transmitted in the attitude and heading computer AHC, the magnetic flux detector assembly FDU and the external compensation assembly ECU of each AHRS. The attitude and heading reference system AHRS provides attitude and stable magnetic heading for other systems of the entire aircraft (ground proximity warning system TAWS, flight guidance system FGS, electronic flight indication EFIS, flight management system FMS and turbulence weather radar TWR, etc.).

[0035] At the target airport, along the first direction of the runway, the verification aircraft glides along the centerline of the runway from the first end A of the runway to the second end B of the runway at a (relatively) fixed speed, such as 36 kilometers per hour. In this process, the avionics system is used to continuously measure the runway magnetic heading data of the verification aircraft, and the runway magnetic heading data includes the ground vector speed (magnetic heading, speed) of the verification aircraft, time, and the longitude and latitude data of the verification aircraft, which are usually multiple data measured when the verification aircraft glides along the centerline of the runway. During the measurement process, the longitude and latitude data of the verification aircraft continuously changes as the verification aircraft moves along the centerline of the runway. In each data, the longitude and latitude data of the verification aircraft corresponds to the ground vector speed and time of the verification aircraft.

[0036] The runway magnetic heading data is measured at a fixed time interval, such as 10 times / second, to obtain a first runway magnetic heading data set, the runway first magnetic heading data set includes m1 heading data Hm1, m1 is a positive integer, and each heading data Hm1 is, for example, "time|ground vector speed|longitude and latitude data of the verification aircraft", wherein the ground vector speed and the longitude and latitude data of the runway correspond to the measurement time; the runway magnetic heading data is measured at a fixed distance interval, such as 1 time / meter, to obtain a second runway magnetic heading data set, the runway second magnetic heading data set includes n1 heading data Hn1, n1 is a positive integer, and each first heading data Hn1 is, for example, "distance|ground vector speed|longitude and latitude data of the verification aircraft", wherein the ground vector speed and the longitude and latitude data of the verification aircraft correspond to the measurement distance.

[0037] S102, based on the first magnetic heading data set of the runway and the second magnetic heading data set of the runway, calculating the average magnetic heading along the first direction of the runway as the magnetic track angle along the first direction of the runway

[0038] Specifically, based on the first magnetic heading data set of the runway, a first average magnetic heading along the first direction of the runway is calculated; based on the second magnetic heading data set of the runway, a second average magnetic heading along the first direction of the runway is calculated; based on the first average magnetic heading and the second average magnetic heading, the average magnetic heading along the first direction of the runway is calculated.

[0039] Among them, the first average magnetic heading along the first direction of the runway is calculated based on the first magnetic heading data set of the runway as follows: all m1 heading data Hm1 of the first magnetic heading data set of the runway are added together to obtain ∑Hm1, and then divided by the number of heading data m1 in the first magnetic heading data set, to obtain the first average magnetic heading along the first direction of the runway ABm1=∑Hm1 / m1.

[0040] Based on the second magnetic heading data set of the runway, the second average magnetic heading along the first direction of the runway is calculated as follows: all n1 heading data Hn1 of the second magnetic heading data set of the runway are added to obtain ∑Hn1, and then divided by the number of heading data n1 in the second magnetic heading data set, to obtain the second average magnetic heading along the first direction of the runway ABn1 = ∑Hn1 / n1.

[0041] The average magnetic heading along the first direction of the runway is calculated based on the first average magnetic heading and the second average magnetic heading: the first average magnetic heading ABm1 along the first direction of the runway is added to the second average magnetic heading ABn1 along the first direction of the runway and the result is divided by 2 to obtain the average magnetic heading along the first direction of the runway (ABm1+ABn1) / 2, which is used as the magnetic track angle along the first direction of the runway.

[0042] S103, calculating the magnetic difference from the first end to the second end of the runway based on the magnetic track angle along the first direction of the runway and the true track angle along the first direction of the runway

[0043] Wherein, based on the longitude and latitude of the first end and the second end of the runway, the true track angle along the first direction of the runway is calculated; the magnetic difference VARAB from the first end to the second end of the runway is equal to the true track angle along the first direction of the runway minus the magnetic track angle along the first direction of the runway.

[0044] S104, along the second direction of the runway, along the centerline of the runway from the second end of the runway to the first end of the runway, by measuring the runway magnetic heading data at fixed time intervals by the calibration aircraft, to obtain a third runway magnetic heading data set, and measuring the runway magnetic heading data at fixed distance intervals to obtain a fourth runway magnetic heading data set

[0045] Since the earth is spherical, the two meridians in the east-west direction are not parallel, and measuring data from a single direction will result in errors. Therefore, the present invention also measures data from the second direction of the runway opposite to the first direction of the runway, and combines the data of the two measurements to reduce the errors. Specifically, at the target airport, along the second direction of the runway, the verification aircraft glides along the centerline of the runway from the second end B of the runway to the first end A of the runway at a (relatively) fixed speed, such as 36 kilometers per hour. In this process, the avionics system is used to continuously measure the runway magnetic heading data of the verification aircraft, and the runway magnetic heading data includes the ground vector speed (magnetic heading, speed) of the verification aircraft, time, and the longitude and latitude data of the verification aircraft.

[0046] Among them, the runway magnetic heading data is measured at a fixed time interval, for example, 10 times / second, to obtain a third runway magnetic heading data set, and the runway third magnetic heading data set includes m2 heading data Hm2, where m2 is a positive integer; the runway magnetic heading data is measured at a fixed distance interval, for example, 1 time / meter, to obtain a fourth runway magnetic heading data set, and the runway fourth magnetic heading data set includes n2 heading data Hn2, where n2 is a positive integer.

[0047] S105, based on the third runway magnetic heading data set and the fourth runway magnetic heading data set, calculating the average magnetic heading along the second direction of the runway as the magnetic track angle along the second direction of the runway

[0048] Specifically, based on the runway third magnetic heading data set, a third average magnetic heading of the runway along the second direction of the runway is calculated; based on the runway fourth magnetic heading data set, a fourth average magnetic heading of the runway along the second direction of the runway is calculated; based on the runway third average magnetic heading and the runway fourth average magnetic heading, the average magnetic heading along the second direction of the runway is calculated.

[0049] Among them, the third average magnetic heading along the second direction of the runway is calculated based on the third magnetic heading data set of the runway as follows: all m2 heading data Hm2 of the third magnetic heading data set of the runway are added to obtain ∑Hm2, and then divided by the number of heading data m2 in the third magnetic heading data set, to obtain the third average magnetic heading along the second direction of the runway ABm2=∑Hm2 / m2.

[0050] Based on the fourth magnetic heading data set of the runway, the fourth average magnetic heading along the second direction of the runway is calculated as follows: add all n2 heading data Hn2 of the fourth magnetic heading data set of the runway to obtain ∑Hn2, and then divide it by the number of heading data n2 in the fourth magnetic heading data set to obtain the fourth average magnetic heading along the second direction of the runway ABn2 = ∑Hn2 / n2.

[0051] The average magnetic heading along the second direction of the runway is calculated based on the third average magnetic heading and the fourth average magnetic heading: the third average magnetic heading ABm2 along the second direction of the runway is added to the fourth average magnetic heading ABn2 along the second direction of the runway and the result is divided by 2 to obtain the average magnetic heading along the second direction of the runway (ABm2+ABn2) / 2 as the magnetic track angle along the second direction of the runway.

[0052] S106, calculating the magnetic deviation from the second end to the first end of the runway based on the magnetic track angle along the second direction of the runway and the true track angle along the second direction of the runway

[0053] Wherein, based on the longitude and latitude of the second end and the first end of the runway, the true track angle along the second direction of the runway is calculated; the magnetic difference VARBA from the second end to the first end of the runway is equal to the true track angle along the second direction of the runway minus the magnetic track angle along the second direction of the runway.

[0054] S107, calculating the magnetic variation of the airport runway based on the magnetic variation from the first end to the second end of the runway and the magnetic variation from the second end to the first end of the runway

[0055] Preferably, the magnetic variation VAR of the airport runway is equal to the average of the magnetic variation VARAB from the first end to the second end of the runway and the magnetic variation VARBA from the second end to the first end of the runway, that is, (VARAB+VARBA) / 2.

[0056] By adopting the method of the embodiment of the present invention, the airport runway magnetic variation data can be obtained quickly and accurately, and accurate flight verification results can be generated using the correct airport runway magnetic variation data. The correct airport runway magnetic variation data can also be used to confirm the magnetic variation data of navigation equipment around the runway.

[0057] In addition, in order to verify the accuracy of the magnetic variation data of the airport runway obtained by the method of the embodiment of the present invention, the inventor can mutually verify the magnetic variation data with the flight verification data of the navigation equipment and the flight procedure involving the magnetic track angle, and confirm that the magnetic variation data of the airport runway obtained by the method of the embodiment of the present invention has a high accuracy and can ensure that the aircraft can fly on the route with the correct magnetic track angle.

[0058] Figure 3 A block diagram of an electronic device 100 suitable for implementing embodiments of the present invention is shown. As shown, the electronic device 100 includes a processor 110. The processor 110 controls the operation and functions of the electronic device 100. For example, in some embodiments, the processor 110 can perform various operations with the help of instructions 330 stored in a memory 120 coupled thereto. The memory 120 can be of any suitable type suitable for the local technical environment and can be implemented using any suitable data storage technology, including but not limited to semiconductor-based memory devices, magnetic memory devices and systems, and optical memory devices and systems. Although Figure 3 Only one memory unit is shown in the figure, but there may be multiple physically different memory units in the electronic device 100.

[0059] The processor 110 may be of any suitable type suitable for the local technical environment and may include, but is not limited to, one or more of a general purpose computer, a special purpose computer, a microcontroller, a digital signal controller (DSP), and a controller-based multi-core controller architecture. The electronic device 100 may also include multiple processors 110 .

[0060] When the processor 110 executes the instruction 130, the electronic device 100 is prompted to perform an action to achieve the above reference Figure 1 The described method will not be repeated here.

[0061] The embodiment of the present invention also provides a computer-readable storage medium, which stores machine-readable instructions, which, when executed by a machine, cause the machine to execute Figure 1 The method described.

[0062] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0063] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0064] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0066] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for detecting magnetic variation of an airport runway, characterized in that: include: Along a first direction of the runway and along a centerline of the runway from a first end of the runway to a second end of the runway, the calibration aircraft measures the runway magnetic heading data at fixed time intervals to obtain a first runway magnetic heading data set, and measures the runway magnetic heading data at fixed distance intervals to obtain a second runway magnetic heading data set; Based on the first magnetic heading data set of the runway and the second magnetic heading data set of the runway, calculating an average magnetic heading along a first direction of the runway as a magnetic track angle along the first direction of the runway; Calculate the magnetic difference from the first end to the second end of the runway based on the magnetic track angle along the first direction of the runway and the true track angle along the first direction of the runway; along a second direction of the runway, along a centerline of the runway from a second end of the runway to a first end of the runway, by measuring the runway magnetic heading data at fixed time intervals by the calibration aircraft to obtain a third runway magnetic heading data set, and measuring the runway magnetic heading data at fixed distance intervals to obtain a fourth runway magnetic heading data set; Calculate, based on the third magnetic heading data set and the fourth magnetic heading data set, an average magnetic heading along the second direction of the runway as a magnetic track angle along the second direction of the runway; Calculate the magnetic difference from the second end to the first end of the runway based on the magnetic track angle along the second direction of the runway and the true track angle along the second direction of the runway; The magnetic variation of the airport runway is calculated based on the magnetic variation from the first end to the second end of the runway and the magnetic variation from the second end to the first end of the runway.

2. The method for detecting magnetic variation of an airport runway according to claim 1, characterized in that: The runway magnetic heading data includes the ground vector speed and time of the calibration aircraft and the latitude and longitude data of the calibration aircraft.

3. The method for detecting magnetic variation of an airport runway as claimed in claim 2, characterized in that: The ground vector velocity includes magnetic heading and rate.

4. The method for detecting magnetic variation of an airport runway according to claim 1, characterized in that: Based on the first magnetic heading data set of the runway and the second magnetic heading data set of the runway, calculating the average magnetic heading along the first direction of the runway as the magnetic track angle along the first direction of the runway, comprising: Calculating a first average magnetic heading along a first direction of the runway based on the first magnetic heading data set of the runway; Calculating a second average magnetic heading along a first direction of the runway based on the runway second magnetic heading data set; The average magnetic heading along the first direction of the runway is calculated based on the first average magnetic heading and the second average magnetic heading.

5. The method for detecting magnetic variation of an airport runway according to claim 1, characterized in that: Calculating an average magnetic heading along a second direction of the runway based on the third magnetic heading data set of the runway and the fourth magnetic heading data set of the runway as a magnetic track angle along the second direction of the runway, including: Calculating a third average magnetic heading of the runway along a second direction of the runway based on the third magnetic heading data set of the runway; Calculating a fourth average magnetic heading of the runway along a second direction of the runway based on the fourth magnetic heading data set of the runway; The average magnetic heading along the second direction of the runway is calculated based on the third average magnetic heading of the runway and the fourth average magnetic heading of the runway.

6. The method for detecting magnetic variation of an airport runway according to claim 1, characterized in that: The true track angle along the first direction of the runway and the true track angle along the second direction of the runway are calculated based on the longitude and latitude of the first end and the second end of the runway.

7. The method for detecting magnetic variation of an airport runway according to claim 1, characterized in that: The magnetic difference from the first end to the second end of the runway is equal to the true track angle along the first direction of the runway minus the magnetic track angle along the first direction of the runway; The magnetic difference from the second end to the first end of the runway is equal to the true track angle along the second direction of the runway minus the magnetic track angle along the second direction of the runway.

8. The method for detecting magnetic variation of an airport runway according to claim 1, characterized in that: The magnetic variation of the airport runway is equal to the average value of the magnetic variation from the first end to the second end of the runway and the magnetic variation from the second end to the first end of the runway.

9. An electronic device, characterized in that: include: processor; and a memory storing instructions which, when executed by the processor, cause the device to perform the method according to any one of claims 1-8.

10. A computer-readable storage medium, characterized in that: The computer stores machine-readable instructions, which, when executed by the machine, cause the machine to perform the method according to any one of claims 1 to 8.

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