CN-117508632-B - Method, device, equipment and medium for detecting activity of airplane airfoil surface

CN117508632BCN 117508632 BCN117508632 BCN 117508632BCN-117508632-B

Abstract

The embodiment of the application discloses a method, a device, equipment and a medium for detecting the activity of an airplane airfoil, relates to the technical field of workpiece detection, and solves the technical problem that the activity detection efficiency of the airplane airfoil is low in the prior art. The detection method comprises the steps of obtaining parameter information of a camera measurement system based on input information of the camera measurement system, obtaining a plurality of images of a target movable part in a rotating process by the camera measurement system at a preset frame rate, obtaining central coordinate values of coding mark points on the images, obtaining angular velocity values of shooting time points corresponding to the images based on the central coordinate values of the coding mark points on the images, obtaining an angular velocity matrix of the target movable part based on the angular velocity values of the shooting time points corresponding to the images, and judging whether the activity degree of the target movable part is qualified or not based on the angular velocity matrix of the target movable part.

Inventors

CHEN DAIXIN
ZHU XUSHENG
ZHOU LI
LIU LEI
MA SHUAI
CHEN JUNYOU

Assignees

成都飞机工业（集团）有限责任公司

Dates

Publication Date: 20260512
Application Date: 20231012

Claims (10)

1. An aircraft airfoil activity detection method is characterized by comprising the following steps: The method comprises the steps of obtaining parameter information of a camera measurement system based on input information of the camera measurement system, wherein the input information comprises an equivalent radius value, a view angle value and a measurement precision value, and the parameter information comprises a camera view value, a camera photographing distance value, a camera resolution, a pixel size value and a lens focal length value; The camera measurement system is used for carrying out the rotation process on a plurality of images of a target movable part at a preset frame rate, and obtaining the central coordinate value of a coding mark point on each image, wherein the preset frame rate meets the following relation: wherein K represents a preset frame rate; The maximum angular velocity value is represented, R represents an equivalent radius value, and B represents a size value of one pixel on the target surface of the camera; obtaining an angular velocity value of a shooting time point corresponding to each image based on a central coordinate value of a coding mark point on each image; And judging whether the activity degree of the target movable part is qualified or not based on the angular velocity matrix of the target movable part.
2. The method of claim 1, wherein the obtaining parameter information of the camera measurement system based on the input information of the camera measurement system comprises: obtaining a camera shooting distance value based on the equivalent radius value and the view angle value; Obtaining a camera view value based on the equivalent radius value; and obtaining a camera resolution, a pixel size value and a lens focal length value based on the camera photographing distance value and the camera view field value.
3. The method of claim 2, wherein the camera field of view value satisfies the relationship: where FOV min represents the camera field of view value and R represents the equivalent radius value.
4. The method of claim 2, wherein the camera shooting distance value satisfies the following relationship: wherein FOV min represents a camera field of view value; The angle of view is indicated and, ≤45°; Representing the camera photographing distance value.
5. The method of claim 1, wherein the angular velocity value satisfies the relationship: In the formula, Representing the angular velocity value at time j, where R represents an equivalent radius value, T represents rotation time; ; The time interval of the photographing is indicated, = 。
6. The method of claim 1, wherein the angular velocity matrix of the target moving part satisfies the relationship: In the formula, Representation of A row of, An angular velocity matrix of the rows, , T represents the rotation time.
7. The method of claim 1, wherein determining whether the activity of the target movable component is acceptable based on the angular velocity matrix of the target movable component comprises: Obtaining an angular velocity curve graph based on an angular velocity matrix of the target movable part, wherein the angular velocity curve graph comprises a plurality of angular velocity curves; Dividing each angular velocity curve into an ascending section, a uniform speed section and a descending section; Comparing the angular velocity value corresponding to the uniform velocity section with an angular velocity threshold value to obtain a comparison result; If the comparison result shows that the angular velocity value corresponding to the uniform velocity section is larger than the angular velocity threshold value, the activity degree of the target movable part is unqualified; And if the comparison result shows that the angular velocity value corresponding to the uniform velocity section is smaller than or equal to the angular velocity threshold value, the activity degree of the target movable part is qualified.
8. An aircraft airfoil activity detection device, comprising: the method comprises the steps of setting a parameter module, wherein the parameter module is used for obtaining parameter information of a camera measurement system based on input information of the camera measurement system, the input information comprises an equivalent radius value, a view angle value and a measurement precision value, the parameter information comprises a camera view value, a camera photographing distance value, a camera resolution, a pixel size value and a lens focal length value, and the equivalent radius value is obtained by arranging a coding mark point at the outer edge of a target movable part of an airplane airfoil; the image acquisition module is used for carrying out the camera measurement on a plurality of images of the target movable part in the rotation process at a preset frame rate and acquiring the central coordinate value of the coding mark point on each image, wherein the preset frame rate meets the following relation: wherein K represents a preset frame rate; The maximum angular velocity value is represented, R represents an equivalent radius value, and B represents a size value of one pixel on the target surface of the camera; the data processing module is used for obtaining the angular velocity value of the shooting time point corresponding to each image based on the central coordinate value of the coding mark point on each image; the data detection module is used for obtaining an angular velocity matrix of the target movable component based on the angular velocity value of the shooting time point corresponding to each image, and judging whether the activity degree of the target movable component is qualified or not based on the angular velocity matrix of the target movable component.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, and wherein the processor executes the computer program to implement the method of aircraft airfoil activity detection of any of claims 1-7.
10. A computer readable storage medium having a computer program stored thereon, the computer program being executable by a processor to implement the aircraft airfoil activity detection method of any of claims 1-7.

Description

Method, device, equipment and medium for detecting activity of airplane airfoil surface Technical Field The application relates to the technical field of workpiece detection, in particular to a method, a device, equipment and a medium for detecting the activity of an airplane airfoil surface. Background After the assembly work is completed, the movable parts of the aircraft such as ailerons, tail wings and the like need to be subjected to related functional tests, wherein one task is to perform rotational functional tests on the movable parts (such as ailerons), namely to check whether the movable parts of the aircraft can complete movement (mainly rotation in a given angle range according to design requirements, and to ensure that the movable parts meet the phenomena of flexible rotation, no clamping stagnation and the like in the rotation process. The traditional inspection method is that one pilot operates in a cockpit, and the other inspector observes outside the aircraft in a visual mode, so that the problems of low reliability and even incapability of inspecting the problems exist when judging whether the rotation is flexible and the jamming exists or not due to the reasons of visual fatigue, strong subjectivity and the like of the manual visual inspection, and serious quality hidden trouble is caused. Therefore, there is a need for an aircraft airfoil activity detection method with higher detection efficiency Disclosure of Invention The embodiment of the application provides a method, a device, equipment and a medium for detecting the activity of an airplane airfoil, which solve the technical problem of low efficiency of detecting the activity of the airplane airfoil in the prior art. In one aspect, an embodiment of the present application provides a method for detecting the activity of an airfoil of an aircraft, including the following steps: Acquiring parameter information of a camera measurement system based on input information of the camera measurement system, wherein the input information comprises an equivalent radius value, a view angle value and a measurement precision value, and the parameter information comprises a camera view value, a camera photographing distance value, a camera resolution, a pixel size value and a lens focal length value; The camera measurement system is used for obtaining a plurality of images of the target movable part in the rotating process at a preset frame rate and obtaining the central coordinate value of the coding mark point on each image; obtaining an angular velocity value of a shooting time point corresponding to each image based on a central coordinate value of a coding mark point on each image; And judging whether the activity degree of the target movable part is qualified or not based on the angular velocity matrix of the target movable part. As some optional embodiments of the present application, the equivalent radius value is obtained by: Arranging coding mark points at the outer edge of a target movable part of an airplane airfoil; and obtaining equivalent radius values of the coding mark point and the target movable part based on the center point of the coding mark point and the center point of the target movable part. As some optional embodiments of the present application, the obtaining parameter information of the camera measurement system based on the input information of the camera measurement system includes: obtaining a camera shooting distance value based on the equivalent radius value and the view angle value; Obtaining a camera view value based on the equivalent radius value; and obtaining a camera resolution, a pixel size value and a lens focal length value based on the camera photographing distance value and the camera view field value. As some optional embodiments of the present application, the camera view value satisfies the following relation: where FOV min represents the camera field of view value and R represents the equivalent radius value. As some optional embodiments of the present application, the camera shooting distance value satisfies the following relation: wherein FOV min represents a camera field of view value; The angle of view is indicated and, ≤45°;Representing the camera photographing distance value. As some optional embodiments of the present application, the preset frame rate satisfies the following relation: wherein K represents a preset frame rate; the fastest angular velocity value is represented by R, the equivalent radius value is represented by R, and the size value of one pixel on the target surface of the camera is represented by B. As some optional embodiments of the present application, the angular velocity value satisfies the following relation: In the formula, Representing the angular velocity value at time j, whereR represents an equivalent radius value, T represents rotation time;; The time interval of the photographing is indicated, =;。 As some optional embodiments of the present application, the ang