A multi-target-based visual identification method for an aviation assembly tool

Abstract

A kind of multi-objective-based aviation assembly tool visual identification method, based on the main features of aviation assembly tool shape, establish measurement datum and temporary measurement datum, then in the same coordinate system, based on the measurement datum established, one-time measurement for the positioning profile of aircraft product, positioning hole, obtain the measurement data for the positioning profile of aircraft product, positioning hole, while measuring the intermediate hole position at measurement datum and temporary datum;Again with the intermediate hole position data at measurement datum as datum, the measured process equipment data is merged, as the only measurement data of process equipment is converted into aircraft design coordinate system, can quickly obtain aviation component assembly production line data, effectively shorten the overall measurement period of aviation assembly tool, realize the fast and high-precision aviation assembly tool measurement.

Description

Technical Field

[0001] This invention relates to the field of visual recognition technology, and in particular to a visual recognition method for aerospace assembly tooling based on multiple targets. Background Technology

[0002] Traditional aerospace assembly tooling, manufactured using conventional methods, has long been used on aircraft assembly lines. Due to continuous wear and deformation, errors accumulate, necessitating periodic condition inspections and corrections. If deviations become severe and manufacturing requirements are not met, it must be replicated. With the shift to modern manufacturing, the inspection and manufacturing of existing aerospace assembly tooling now rely entirely on digital methods, using laser trackers to measure key data to assist in inspection and manufacturing. However, because laser trackers operate as contact measurements, they struggle to quickly acquire surface measurement data for large and complex structures. For rapid, one-time measurements of process equipment on aircraft assembly lines, a new measurement method is urgently needed to improve measurement speed. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a multi-target-based visual recognition method for aerospace assembly tooling, so as to solve the problems in the background art mentioned above.

[0004] The technical problem solved by this invention is achieved by the following technical solution: A multi-objective visual recognition method for aerospace assembly tooling, the specific steps of which are as follows: Step 1) Determine the physical condition To improve the conformity between the measurement data and design data of aviation assembly tooling, the main original manufacturing tooling of aviation assembly tooling is installed on the process equipment, and the physical condition is inspected. If it does not conform, the process equipment is adjusted to the state of the drawing design. Step 2) Establish measurement benchmarks Design and install the measurement reference on the outer surface of the process equipment. For multiple measurements of the same process equipment, use this measurement reference. Step 3) Establish a temporary benchmark Based on the measurement range of the measuring equipment, a temporary reference fixed to the ground is established near the periphery of the process equipment; Step 4) Measure the positioning surface In the same coordinate system, based on the measurement datum established in step two), the complex positioning surface in the process equipment that comes into contact with the aircraft product is measured in one go, and the intermediate hole located at the measurement datum is measured at the same time. Step 5) Measure the positioning hole Since the aerospace assembly tooling used for assembly consists of positioning surfaces and positioning holes for aircraft products, the positioning surfaces and positioning holes for aircraft products are measured in one go in the same coordinate system based on the measurement datum established in step 2) to obtain the measurement data of the positioning surfaces and positioning holes for aircraft products. At the same time, the intermediate hole position located at the temporary datum is measured. Step 6) Merge measurement data Using the data of the intermediate hole located at the measurement reference in step four) as the reference, the process equipment data measured in step five) are combined as the sole measurement data of the process equipment. Step 7) Data Conversion Using the positioning hole measurement data and positioning hole design data obtained in step five as a reference, the measurement data obtained in step six is ​​converted into the aircraft design coordinate system.

[0005] In this invention, in step four, a portable non-contact laser measurement device is selected to measure the complex positioning surface in the process equipment that comes into contact with the aircraft product.

[0006] In this invention, in step four), the portable non-contact laser measurement device includes a handheld scanner.

[0007] In this invention, in step five, the positioning surface and positioning holes for aircraft products are measured using a laser tracker.

[0008] Beneficial effects: This invention can be directly used for the overall measurement of aviation assembly tooling, effectively solving the problem of the difficulty in the overall measurement of aviation assembly tooling and greatly shortening the measurement cycle of aviation assembly tooling. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the aerospace assembly tooling structure in a preferred embodiment of the present invention.

[0010] Figure 2 This is a schematic diagram of the measurement reference base structure in a preferred embodiment of the present invention. Detailed Implementation

[0011] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0012] A multi-objective visual recognition method for aerospace assembly tooling, the specific steps of which are as follows: Step 1) Determine the physical condition To improve the conformity between measurement data and design data of aerospace assembly tooling, the main original manufacturing tooling of aerospace assembly tooling is installed on the process equipment, and the physical condition is inspected. If it does not conform, the process equipment needs to be adjusted to the design state shown in the drawings; therefore, in Figure 1At the location of the positioning hole D, install the original standard tooling used for its manufacturing, check whether the condition of the positioning hole D meets the design requirements, and check the 20 mounting holes E of the positioning surface F. Clean the debris in the mounting holes E to make the surface of the mounting holes E smooth and free of impurities for easy measurement. Step 2) Establish measurement benchmarks To facilitate the merging and unification of measurement data, a reference datum for measurement is designed and installed on the outer surface of the process equipment. This datum is used for all multiple measurements of the same process equipment. Figure 1 Four locations, A1, A2, A3, and A4, on the surface of the process equipment are connected by bolts. Figure 2 The measurement reference base shown is installed on the process equipment; Step 3) Establish a temporary benchmark To facilitate subsequent measurements and data supplementation, a temporary benchmark is established. Based on the measurement range of the measuring equipment, a temporary benchmark fixed to the ground is established near the periphery of the process equipment, such as... Figure 1 In the process, four locations, B1, B2, B3, and B4, were identified approximately 500mm around the ground perimeter of the actual installation site for the process equipment. Figure 2 The measuring reference base is temporarily glued to the ground located at B1, B2, B3, and B4; Step 4) Measure the positioning surface Using a portable, non-contact laser measurement device, such as a handheld scanner, rapid measurement can be performed within the same coordinate system, based on the measurement benchmark established in step two). Figure 1 The inner surface of the 20 positioning surfaces F shown in the figure is measured, and the middle hole of the measuring reference seat located at A1, A2, A3, and A4 is also measured. Step 5) Measure the positioning hole The aerospace assembly tooling used for assembly mainly consists of features such as positioning surfaces F and positioning holes D for aircraft products. For the measurement of positioning holes D, high-precision contact measuring equipment is used for accurate measurement. To facilitate the unification of measurement data from different devices, in the same coordinate system, based on the measurement benchmark established in step two), a one-time measurement is performed using a laser tracker for rapid measurement. Figure 1 The mounting holes G of approximately 5 positioning holes D and 20 positioning surfaces F shown in the figure are used to obtain the measurement data of positioning surfaces F and positioning holes D for aircraft products. At the same time, the middle hole positions of the measuring reference seats at B1, B2, B3, and B4 are measured. Step 6) Merge measurement data Using the measurement data of the reference seats at A1, A2, A3, and A4 in step four as the reference, the measurement data of the positioning surface F, positioning hole D, and mounting hole G are combined as the sole measurement data of the process equipment. Step 7) Data Conversion Using the measurement data and design data of the positioning hole D obtained in step 5) as a reference, the measurement data of the positioning surface F, positioning hole D and mounting hole G in step 6) are converted into the aircraft design coordinate system.

[0013] In this embodiment, by converting the measurement data of aviation assembly tooling into the aircraft design coordinate system, the overall measurement can be quickly identified, meeting the need for rapid overall measurement of aviation assembly tooling.

[0014] The specific embodiments described herein are merely illustrative examples of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or adopt similar methods to replace them, but without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A multi-objective visual recognition method for aerospace assembly tooling, characterized in that, The specific steps are as follows: Step 1) Determine the physical condition Install the main original manufacturing tooling of aerospace assembly tooling on the process equipment and inspect the physical condition. If it does not meet the requirements, adjust the process equipment to the state of the drawing design. Step 2) Establish measurement benchmarks Design and install the measurement reference on the outer surface of the process equipment. For multiple measurements of the same process equipment, use this measurement reference. Step 3) Establish a temporary benchmark Based on the measurement range of the measuring equipment, a temporary reference fixed to the ground is established near the periphery of the process equipment; Step 4) Measure the positioning surface In the same coordinate system, based on the measurement datum established in step two), the complex positioning surface in the process equipment that comes into contact with the aircraft product is measured in one go, and the intermediate hole located at the measurement datum is measured at the same time. Step 5) Measure the positioning hole Since the aerospace assembly tooling used for assembly consists of positioning surfaces and positioning holes for aircraft products, the positioning surfaces and positioning holes for aircraft products are measured in one go in the same coordinate system based on the measurement datum established in step 2) to obtain the measurement data of the positioning surfaces and positioning holes for aircraft products. At the same time, the intermediate hole position located at the temporary datum is measured. Step 6) Merge measurement data Using the data of the intermediate hole located at the measurement reference in step four) as the reference, the process equipment data measured in step five) are combined as the sole measurement data of the process equipment. Step 7) Data Conversion Using the positioning hole measurement data and positioning hole design data obtained in step five as a reference, the measurement data obtained in step six is ​​converted into the aircraft design coordinate system.

2. The multi-target-based visual recognition method for aerospace assembly tooling according to claim 1, characterized in that, In step four, a portable non-contact laser measuring device is used to measure the complex positioning surfaces in the process equipment that come into contact with the aircraft products.

3. The multi-target-based visual recognition method for aerospace assembly tooling according to claim 2, characterized in that, Portable non-contact laser measurement devices include handheld scanners.

4. The multi-target-based visual recognition method for aerospace assembly tooling according to claim 1, characterized in that, In step five, the positioning surfaces and positioning holes used for aircraft products are measured using a laser tracker.

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