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Complex multi-pipeline system detection method

A detection method and pipeline system technology are applied in the field of complex multi-pipeline system detection, which can solve the problem of inability to obtain complex multi-pipeline detection, and achieve the effects of rich results, improved manual manual inspection, and simple system requirements.

Active Publication Date: 2017-09-29
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the shortcomings in the prior art that only a single bent pipe can be detected and a complete complex multi-pipeline detection cannot be obtained, the present invention proposes a complex multi-pipeline system detection method

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Embodiment Construction

[0041] This embodiment is a detection method for a complex multi-pipeline system, comprising the following steps:

[0042] The first step: preliminary preparation.

[0043] The preparatory preparations include pasting markers and placing rulers.

[0044]On the surface of the accessories in the pipeline system to be tested, according to the principle requirements of photogrammetry, mark points are pasted according to the size of the pipeline system to be tested and the measurement requirements; the accessories are other components in the pipeline system except the pipeline, including Valves, pumps, connections and fixtures. The marker points used include coded marker points and non-coded marker points, and the total number of coded marker points in each image is not less than 5, and the number of common coded marker points contained in two adjacent images is greater than 3; the said The image of is a picture of the surface of the pipeline system to be tested taken by the came...

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Abstract

The invention relates to a complex multi-pipeline system detection method. Mark points adhered to the surfaces of attachments in a to-be-detected pipeline system are used as the basis of industrial photogrammetry solution for later solution of inner and outer parameters of a digital camera; scales placed at the edges of the pipeline system or in other adjacent pipeline systems are used for carrying out corresponding solution on a pixel size of a camera and an actual length size of the camera in a physical coordinate system. According to the complex multi-pipeline system detection method disclosed by the invention, an optical measurement means is used; by image processing, two-dimensional pipeline identification is carried out; based on an industrial close-range photogrammetry principle, reconstruction of a three-dimensional pipeline is carried out. An image is used for carrying out data processing and the industrial photogrammetry principle is very high in three-dimensional reconstruction accuracy, and thus, only images at different angles need to be shot for complex pipelines; the complex multi-pipeline system detection method is simple and convenient to operate, and accuracy of pipeline detection is ensured.

Description

technical field [0001] The invention relates to a detection method for a complex multi-pipeline system. Background technique [0002] Piping systems are an important part of industrial systems, and are widely used in aerospace engines and other fields. The current detection methods are mainly aimed at single-pipe inner wall detection and single-pipe shape detection. For complex multi-pipeline systems composed of multiple pipelines, three-coordinate or manual detection is mainly used. The detection efficiency is low and cannot meet today’s fast and efficient detection requirements. Moreover, the three-coordinate detection method cannot detect large-scale piping systems. [0003] Existing bent pipe detection methods are mainly the detection of a single bent pipe, a method for identifying the bending phenomenon of acoustic tubes using the acoustic transmission method for foundation pile detection (CN106501368A) uses ultrasonic waves to identify bent pipes; a bent pipe Angle d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/04G01B11/00G06K9/60G06T17/00
CPCG06T17/00G01B11/00G01C11/04G06V10/20
Inventor 李玉龙郭翔索涛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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