Flexible method for detecting quality of curved surface of head of high-speed train

Abstract

The invention discloses a flexible method for detecting the quality of the curved surface of a head of a high-speed train, and the method comprises the following steps: S1, pasting a mark point and acoding point on the surface of a detected part; S2, fixing a high-precision measurement scale in a scanned region; S3, carrying out the omnibearing and multi-angle shooting of the detected part of thehead of the high-speed train through a close-shot three-dimensional photogrammetry system, and constructing a global coordinate system; S4, scanning the surface of the head of the high-speed train through three-dimensional scanning equipment, and obtaining the point cloud data of the surface of the head. According to the invention, the method combines the close-shot three-dimensional photogrammetry system and a hand-held three-dimensional scanner, achieves the precise measurement of the head, exceeding a measurement range, of the high-speed train, effectively controls the registration precision of multi-view point cloud in a three-dimensional scanning process, guarantees the measurement precision of a large-scale part, and solves a problem that the manufacturing quality of the curved surface of the head of the high-speed train is difficult to detect.

Description

technical field [0001] The invention relates to the technical field of quality detection, and relates to a flexible detection method for the quality of a complex curved surface of a high-speed train head. Background technique [0002] During the running of high-speed trains, the locomotive is the main part of the windward force, and the manufacturing accuracy of its surface is directly related to the windward force distribution and operation safety of the high-speed train. The quality inspection of the front part of the high-speed train has always been a difficult point in the inspection technology. [0003] In the current production process, the front of the car is mainly tested by making a special model, which is a rigid solution. [0004] Its main disadvantages are manifested in the following aspects: [0005] (1) It can only be limited to the measurement of a single quality parameter, and it is necessary to make a variety of different inspection tools for the detection...

AI Technical Summary

Problems solved by technology

[0011] According to the technical problems raised above, a flexible quality detection method for the curved surface of the high-speed train head is provided, which is used to solve the problem that the application of the existing three-dimensional scanning technology in quality detection is still limited to general small parts. Before scanning small parts, it is often necessary to clamp and position the parts to ensure the reliability of the positioning, and then scan and measure the parts. However, the high-precision detection method for large parts is still blank.

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