Multi-camera networking positioning calibration method for aircraft digital assembly

Abstract

The invention discloses a multi-camera networking positioning calibration method for an aircraft digital assembly. A global control point in a measurement field is measured through laser tracking, anda global measurement coordinate system is constructed through an adjustment model, so that the overall error of aircraft profile measurement can be effectively controlled. An auxiliary reference point is measured through a photogrammetric network of multi-camera networking, and high-precision local measurement data is efficiently obtained. Through an RANSAC algorithm, a global control point and an auxiliary reference point are aligned and fused, the problem of global splicing error accumulation of local measurement data is solved, and the high-precision global measurement coordinate system (measurement field) is constructed. According to the invention, through combination of laser tracking and multi-camera networking, dependence on the number of laser tracker equipment can be effectivelyreduced, the construction cost of the measurement field is reduced, the automatic construction capability of the measurement field can be improved through photogrammetry, and the measurement efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of digital measurement, and in particular relates to a multi-camera network positioning and calibration method for aircraft digital assembly. Background technique [0002] In recent years, with the country's attention and support for the development of the aviation industry, my country's aviation manufacturing industry has developed rapidly, and various new aircraft have been successfully developed and put into mass production. However, many problems need to be solved urgently exposed in the digital assembly process of aircraft, such as the whole aircraft measurement. [0003] At present, the measurement of the whole aircraft usually uses a structured light scanner or a combined scanning system of a laser scanner and a tracker for sub-station measurement, and only local measurement data of the aircraft can be obtained. In order to obtain the overall measurement data of the aircraft, it is necessary to perfo...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the positioning calibration method in the whole aircraft measurement process, Beijing University of Aeronautics and Astronautics proposed a multi-scale measurement field integrated positioning method based on indoor GPS (iGPS or indoorGPS) measurement network and laser tracker. Multiple transmitters and wireless sensors (receivers) are arranged in the measurement site, the installation process is cumbersome, and the actual application effect is poor

At the same time, in order to ensure the high performance requirements of the transmitter and receiver for the accuracy of the measurement field, it is necessary to configure a high-precision transmitter and receiver, and the high-precision equipment is expensive, resulting in a high cost of the measurement system

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