A device and method for extracting the symmetry axis of an aircraft

Abstract

This invention relates to a device and method for determining the aircraft's axis of symmetry, used to determine the aircraft's axis of symmetry and the target plate position during target calibration of a certain type of aircraft. The device comprises a total station, a two-dimensional translation stage, a support, and a target plate. Its key feature is that a two-dimensional adjustment mechanism is installed at the bottom of the total station, enabling translation of the total station; the target plate's azimuth, pitch, and roll are adjustable; a center line is engraved on the target plate surface, and a parallel line is engraved at a distance D from the center line. With the aircraft in a level position, the aircraft's axis of symmetry is determined by scanning measurement points on the aircraft with the total station, thereby determining the target plate position and completing the target plate adjustment function. This invention can quickly and accurately determine the target plate position and attitude, while ensuring that the target plate's azimuth is perpendicular to the aircraft's axis of symmetry, thus improving the accuracy of aircraft target calibration.

Description

Technical Field

[0001] This invention belongs to the field of aircraft target calibration, specifically an aircraft symmetry axis extraction device and method. Background Technology

[0002] Airplanes fly in the air, and balance in the air is crucial, far more so than on the ground. Therefore, the aircraft's axis of symmetry is critical to its flight and maintaining its center of gravity.

[0003] Currently, in aircraft target calibration, the aircraft's axis of symmetry is often derived using tools such as plumb lines and measuring rulers. This process is complex and lacks precision. Furthermore, there is no corresponding method to ensure that the target plate is perpendicular to the aircraft's axis of symmetry. Summary of the Invention

[0004] The technical problem to be solved by this invention is:

[0005] To overcome the shortcomings of existing technologies, this invention provides an aircraft symmetry axis extraction device and method. It is used to determine the aircraft's symmetry axis and the target plate position during target calibration of a certain type of aircraft.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] An aircraft symmetry axis extraction device is characterized by comprising: a total station, a two-dimensional translation stage, a support, and a target plate; the two-dimensional translation stage is installed at the bottom of the total station, enabling translation of the total station; the two-dimensional translation stage is located on the support; the azimuth, pitch, and roll of the target plate are adjustable, a center line is engraved on the target surface of the target plate, and a line parallel to the center line is engraved at a distance D from the center line.

[0008] A further technical solution of the present invention: the bracket is a triangular bracket.

[0009] A further technical solution of the present invention: the total station is located directly below the aircraft.

[0010] A further technical solution of the present invention: the target plate is located 20-30m from the nose of the aircraft.

[0011] A method for deriving the symmetry axis of an aircraft, characterized by the following steps:

[0012] Step 1: Install the 2D translation stage and total station onto the bracket in sequence; level the total station, adjust the pitch angle of the total station to 0° and lock it, at this time the central axis of the total station telescope points directly upward;

[0013] Step 2: Adjust the two-dimensional translation stage so that the crosshairs of the total station telescope coincide with the aircraft marker point 1; rotate the total station telescope to tilt and confirm whether the crosshairs of the total station telescope can coincide with the aircraft marker point 2. If not, rotate the total station azimuth and adjust the total station position to make the crosshairs of the telescope coincide with the aircraft marker point 2.

[0014] Step 3: Pitch the telescope in the pitch direction to ensure that the crosshairs of the telescope coincide with the aircraft markers 1 and 2 respectively. At this time, the telescope axis is coplanar with points 1 and 2 and perpendicular to the horizontal plane of the ground.

[0015] Step 4: Adjust the pitch angle of the total station telescope to 90° and lock it. At this time, the central axis of the telescope is the symmetry axis of the aircraft, and its spatial position represents the pitch and azimuth of the aircraft.

[0016] Step 5: Using the total station's distance measurement function, measure the horizontal distance between the total station and the aircraft marker point 1 and the target board, respectively, so that the target board is placed at a position L in front of the aircraft marker point 1; L is the theoretical placement distance between the target board surface and the aircraft marker point.

[0017] Step 6: Adjust the target plate so that the total station is aligned with the center mark line of the target plate. Rotate the azimuth angle α of the total station and observe whether the crosshairs of the total station telescope are on the mark line at a distance D from the center mark line. If not, adjust the azimuth of the target plate so that the crosshairs of the total station telescope are on the mark line at a distance D from the center mark line. At this time, the azimuth of the target plate is perpendicular to the symmetry axis of the aircraft.

[0018] Step 7: The target plate's roll and pitch can be adjusted using the target plate's horizontal bubble;

[0019] Step 8: Repeat steps 5, 6, and 7. When all requirements are met, the target plate is located L in front of the aircraft marking point 1, and the target surface is perpendicular to the aircraft's axis of symmetry.

[0020] The beneficial effects of this invention are as follows:

[0021] The present invention provides an aircraft symmetry axis extraction device and method. Using the aircraft symmetry axis extraction device, the aircraft symmetry axis is determined by scanning the marking points on the aircraft with a total station when the aircraft is in a flat state. Then, the distance between the target plate and the aircraft marking points and the orientation of the target plate can be determined by the feature marking lines on the target plate, thus completing the precise placement of the target plate.

[0022] By utilizing the aforementioned aircraft symmetry axis extraction device to extract the aircraft symmetry axis and determine the distance and position of the target plate, the present invention can quickly and accurately determine the position and attitude of the target plate, while ensuring that the target plate orientation is perpendicular to the aircraft symmetry axis, thereby improving the accuracy of aircraft target calibration. Attached Figure Description

[0023] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0024] Figure 1 This is a diagram illustrating aircraft marker points.

[0025] Figure 2 This is a schematic diagram of a total station, a two-dimensional translation stage, and a support frame.

[0026] Figure 3 This is a schematic diagram of the scribing on the target plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0028] This invention provides an aircraft symmetry axis extraction device, such as... Figure 2 As shown, it includes: a total station, a two-dimensional translation stage, a support frame, and a target plate. The total station has a two-dimensional translation stage mounted on its bottom for translation; the stage is located on the support frame; the target plate's azimuth, pitch, and roll are adjustable. A center line is engraved on the target plate surface, and a parallel line is engraved at a distance D from the center line (D = L * tanα, where L is the theoretical distance between the target plate surface and the aircraft marker, and α is the total station's azimuth rotation angle). Figure 3 As shown.

[0029] Specifically, the total station is located directly below the aircraft; the target plate is located at the nose of the aircraft (20-30m).

[0030] Using the aircraft symmetry axis derivation device, the aircraft's symmetry axis is determined by scanning the marked points on the aircraft with a total station while the aircraft is in a level state. Then, by using the characteristic marking lines on the target plate, the distance between the target plate and the aircraft's marked points and the target plate's orientation can be determined, thus completing the precise placement of the target plate.

[0031] Utilizing the aforementioned aircraft symmetry axis extraction device for extracting the aircraft symmetry axis and determining the distance and position of the target plate, this embodiment of the invention also provides an aircraft symmetry axis extraction method, the specific implementation of which includes the following steps:

[0032] (1) Install the two-dimensional translation stage and the total station onto the support in sequence. Level the total station, adjust the pitch angle of the total station to 0° and lock it. At this time, the central axis of the total station telescope points directly upward (perpendicular to the horizontal plane of the earth).

[0033] (2) Adjust the two-dimensional translation stage so that the crosshairs of the total station telescope coincide with aircraft marker point 1. Rotate the total station telescope to adjust its pitch and confirm whether the crosshairs of the total station telescope coincide with aircraft marker point 2. If not, adjust the total station's azimuth and position to make the crosshairs coincide with aircraft marker point 2. Aircraft marker point 1 and aircraft marker point 2 are as follows: Figure 1 As shown.

[0034] (3) Pitch the telescope in the pitch direction to ensure that the crosshairs of the telescope coincide with the aircraft markings 1 and 2 respectively. At this time, the telescope axis is coplanar with points 1 and 2 and perpendicular to the horizontal plane of the earth.

[0035] (4) Adjust the pitch angle of the total station telescope to 90° and lock it. At this time, the central axis of the telescope is the symmetry axis of the aircraft (parallel to the longitudinal axis of the aircraft), and its spatial position represents the pitch and azimuth of the aircraft.

[0036] (5) Using the total station's distance measurement function, measure the horizontal distance between the total station and the aircraft marker point 1 and the target board respectively, so that the target board is placed at L in front of the aircraft marker point 1.

[0037] (6) Adjust the target plate so that the total station is aligned with the center mark line of the target plate. Rotate the azimuth angle α of the total station and observe whether the crosshairs of the total station telescope are on the mark line at a distance D from the center mark line. If not, adjust the azimuth of the target plate so that the crosshairs of the total station telescope are on the mark line at a distance D from the center mark line. At this time, the azimuth of the target plate is perpendicular to the axis of symmetry of the aircraft.

[0038] (7) The target plate roll and pitch can be adjusted by the target plate's horizontal bubble.

[0039] (8) Repeat steps 5, 6, and 7. When the requirements are met simultaneously, the target plate is located L in front of the aircraft marking point 1, and the target plate surface is perpendicular to the aircraft's axis of symmetry.

[0040] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the scope of the technology disclosed in the present invention, and such modifications or substitutions should all be covered within the scope of protection of the present invention.

Claims

1. A method for deriving the aircraft's axis of symmetry, wherein the aircraft axis of symmetry deriving device comprises: The system comprises a total station, a two-dimensional translation stage, a support frame, and a target plate. The total station is equipped with a two-dimensional translation stage at its bottom, enabling translation of the total station. The two-dimensional translation stage is located on the support frame. The target plate is adjustable in azimuth, pitch, and roll. A center line is engraved on the target plate surface, and a line parallel to the center line is engraved at a distance D from the center line. The system is characterized by the following steps: Step 1: Install the 2D translation stage and total station onto the bracket in sequence; level the total station, adjust the pitch angle of the total station to 0° and lock it, at this time the central axis of the total station telescope points directly upward; Step 2: Adjust the two-dimensional translation stage so that the crosshairs of the total station telescope coincide with the aircraft marker point 1; rotate the total station telescope to tilt and confirm whether the crosshairs of the total station telescope can coincide with the aircraft marker point 2. If not, rotate the total station azimuth and adjust the total station position to make the crosshairs of the telescope coincide with the aircraft marker point 2. Step 3: Pitch the telescope in the pitch direction to ensure that the crosshairs of the telescope coincide with the aircraft markers 1 and 2 respectively. At this time, the telescope axis is coplanar with points 1 and 2 and perpendicular to the horizontal plane of the ground. Step 4: Adjust the pitch angle of the total station telescope to 90° and lock it. At this time, the central axis of the telescope is the symmetry axis of the aircraft, and its spatial position represents the pitch and azimuth of the aircraft. Step 5: Using the total station's distance measurement function, measure the horizontal distance between the total station and the aircraft marker point 1 and the target board, respectively, so that the target board is placed at a position L in front of the aircraft marker point 1; L is the theoretical placement distance between the target board surface and the aircraft marker point. Step 6: Adjust the target plate so that the total station is aligned with the center mark line of the target plate. Rotate the azimuth angle α of the total station and observe whether the crosshairs of the total station telescope are on the mark line at a distance D from the center mark line. If not, adjust the azimuth of the target plate so that the crosshairs of the total station telescope are on the mark line at a distance D from the center mark line. At this time, the azimuth of the target plate is perpendicular to the symmetry axis of the aircraft. Step 7: Adjust the target plate's roll and pitch; Step 8: Repeat steps 5, 6, and 7. When all requirements are met, the target plate is located L in front of the aircraft marking point 1, and the target surface is perpendicular to the aircraft's axis of symmetry.

2. The method for deriving the aircraft's axis of symmetry according to claim 1, characterized in that, The bracket is a triangular bracket.

3. The method for deriving the aircraft's axis of symmetry according to claim 1, characterized in that, The total station is located directly below the aircraft.

4. The method for deriving the aircraft's axis of symmetry according to claim 1, characterized in that, The target plate is located 20-30m from the nose of the aircraft.

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