A method and system for measuring the level of an airborne aircraft

Abstract

The invention relates to an airborne air plane horizontal measuring method. The method comprises the steps that impulse signals which are transmitted by first positioning labels fixed to a transversehorizontal reference point and a transverse horizontal reference point of are received, and impulse signals transmitted by second positioning labels at feature points of the air plane is received; anair plane horizontal reference plane is established according to the impulse signals transmitted by the first positioning labels, and an air plane three-dimensional coordination system is establishedbased on the horizontal reference plane of the air pane; three-dimensional coordinates of the second positioning labels in the three-dimensional coordination system are positioned; whether or not theair plane deforms is judged according the three-dimensional coordinates of the second positioning labels. The method and the system have the advantages that on-site arrangement does not need to be conducted when measuring is conducted every time, operation errors can be prevented, measuring procedures can be reduced, and the measuring time is shortened.

Description

technical field [0001] The invention relates to measurement technology, in particular to an airborne aircraft level measurement method and system. Background technique [0002] Aircraft level measurement is also called aircraft feature point measurement. Aircraft level measurement is detected by setting feature points on the surface of the aircraft body. The feature points are made at the specified position on the surface of the component during component assembly, using specific tools or tooling. There are different forms of marks, such as punch points, small holes, special rivets, screws, etc. These feature points are called horizontal measurement points. [0003] Aircraft level measurement is to detect the relative geometric relationship between the major components of the aircraft and its own geometric deformation. By measuring the level measurement points, it is possible to detect whether the overall assembly quality of the aircraft and the deviation between the actual ...

AI Technical Summary

Problems solved by technology

But on the one hand, when using the laser measurement system, the measurement can only be carried out when the aircraft stops at the designated measurement site, and each feature point needs to be positioned at 4 points during the measurement, so the measurement process is more complicated. , the position and emission angle of the laser transmitter need to be adjusted on-site, and personnel operation errors are inevitable during on-site layout; Due to the limitation of the measurement range, for the horizontal measurement of large-sized aircraft, it is impossible to measure all the feature points on all aircraft at one time, and it is necessary to use indirect measurement to measure, which makes the measurement very complicated and takes a long time to measure

[0006] In addition, the error of the laser measurement system is greatly affected by the temperature and humidity of the air, and in a high-humidity measurement environment, the auxiliary measurement tool ball of the laser radar will quickly oxidize and rust, which affects the calibration accuracy of the laser radar, and its measurement cannot be guaranteed. quality

Images