Unlock instant, AI-driven research and patent intelligence for your innovation.

Aircraft control surface angle measurement method based on binocular vision principle

A technology of binocular vision and angle measurement, which is applied in the direction of measuring device, angle measurement, photogrammetry/video measurement, etc. It can solve problems such as throwing out tooling, complicated installation and adjustment, and permanent damage to the rudder surface, so as to avoid installation , Improve the effect of measurement efficiency and accuracy

Inactive Publication Date: 2020-11-10
CHENGDU AIRCRAFT INDUSTRY GROUP
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional measurement method uses a clamping tooling target for measurement. Since the rudder surface is made of composite materials, if the target holding force is too large, the hard contact between the target and the rudder surface may cause permanent damage to the rudder surface; If the force is too low, the centrifugal force generated by the rudder surface speed of 150° / s may cause the tooling to be thrown out by the rudder surface, which may cause damage to the aircraft, testers or equipment
[0003] When non-contact measurement is used, the general measurement method has strict requirements on the relative position between the traditional measuring equipment and the rudder surface of the tested aircraft, and the installation and adjustment are complicated. The relative position relationship between the measurement position and the rudder surface is not fixed, resulting in system error amplification and Difficult to correct through later technical means, affecting the final test accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aircraft control surface angle measurement method based on binocular vision principle
  • Aircraft control surface angle measurement method based on binocular vision principle
  • Aircraft control surface angle measurement method based on binocular vision principle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of aircraft rudder surface angle measurement method based on binocular vision principle of the present embodiment, comprises the following steps:

[0057] Step 1, adopting the first camera and the second camera to form a binocular stereo vision system;

[0058] Step 2, select a feature point P on the rudder surface of the aircraft, and then use the binocular stereo vision system to collect N images of the feature point P at each moment during the movement of the rudder surface of the aircraft;

[0059] Step 3. Calculate the N spatial three-dimensional coordinate points of the feature point P at each moment for the N images based on the principle of binocular vision calculation, and obtain the swing angle plane by fitting the N spatial three-dimensional coordinate points;

[0060] Step 4, projecting N space three-dimensional coordinate points to the swing angle plane to obtain N two-dimensional coordinate points located in the swing angle plane, and then fitting t...

Embodiment 2

[0064] This embodiment is further optimized on the basis of embodiment 1, such as figure 1 As shown, the calculation of the rudder surface swing angle in the step 5 adopts the following formula:

[0065]

[0066] in:

[0067] is the initial two-dimensional coordinate point P 1 coordinate of; is the coordinates of the i-th two-dimensional coordinate point;

[0068] (x 0 ,y 0 ) is the center coordinate of the trajectory arc; θ i is the rudder surface swing angle, 0≤θ i <π.

[0069] Take the aileron as an example to illustrate the specific implementation steps of rudder surface angle measurement:

[0070] a) Paste 4 photogrammetry coding marks on the lower end surface of the aileron;

[0071] b) Set up a binocular stereo vision system consisting of the first camera and the second camera under the aileron, the lens of the camera faces upward, and the distance between the lens and the aileron is 2m-3m;

[0072] c) Open the dual-camera system measurement software t...

Embodiment 3

[0078] This embodiment is further optimized on the basis of the above-mentioned embodiment 1 or 2, and the step 3 includes the following sub-steps:

[0079] Step 3.1, if figure 2 As shown, establish the world coordinate system (O-X w Y w Z w ), camera coordinate system (O-X c Y c Z c ), image physical coordinate system (xOy), image pixel coordinate system (uOv), camera-based calibration parameters and world coordinate system (O-X w Y w Z w ), camera coordinate system (O-X c Y c Z c ), image physical coordinate system (xOy), image pixel coordinate system (uOv);

[0080] World coordinate system (O-X w Y w Z w ) is used to describe the specific position of the object in the real environment, and the position of the measured feature point P in the world coordinate system is its absolute coordinate;

[0081] Camera coordinate system (O-X c Y c Z c ) is a three-axis Cartesian coordinate system established with the center of the camera lens as the origin, where Z ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an airplane control surface angle measurement method based on a binocular vision principle, and the method comprises the steps of tracking a feature point on a measured controlsurface in real time through a binocular stereo vision system formed by double cameras, and obtaining the three-dimensional space coordinates of the feature point at each moment; fitting a swing angle plane of the control surface and a trajectory arc of the movement of the feature points according to the three-dimensional space coordinates by adopting a least square method, and then obtaining thedynamic swing angle of the corresponding control surface according to the included angle between the circle center of the trajectory arc and the vector of each point on the trajectory arc. The methodhas the beneficial effects of high detection efficiency, high detection precision, simple operation, low possibility of damaging the control surface and low dependence on the mounting position.

Description

technical field [0001] The invention belongs to the technical field of aircraft control surface angle measurement, and in particular relates to an aircraft control surface angle measurement method based on the principle of binocular vision. Background technique [0002] Before the flight test of the aircraft, in order to give reliable performance test data, it is necessary to conduct angle measurement experiments on the rudder surfaces of the aircraft such as ailerons, flaps, rudders, and elevators. The traditional measurement method uses a clamping tooling target for measurement. Since the rudder surface is made of composite materials, if the target holding force is too large, the hard contact between the target and the rudder surface may cause permanent damage to the rudder surface; If the force is too low, the rotational speed of the rudder surface at 150° / s will generate a large centrifugal force, which may cause the tooling to be thrown out by the rudder surface, which ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01C1/00G01C11/00
CPCG01C1/00G01C11/00
Inventor 牟成铭叶丁绮罗川张泉
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com