Elbow detection method based on mileage and attitude information
A detection method and technology of elbows, which are applied in the directions of measuring devices, measuring distances, surveying and navigation, etc., can solve problems such as the inability to accurately detect and obtain specific information of elbows, and the limited volume of small-diameter pipe products and the inability to install trajectory mapping modules, etc.
Pending Publication Date: 2022-03-25
CNOOC GAS & POWER GRP
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[0005] In view of the above analysis, the embodiment of the present invention aims to provide an elbow detection algorithm based on mileage and attitude information to solve the problem that the existing small-diameter pipeline products cannot be installed with a trajectory mapping module due to their limited volume, so that they cannot be accurately detected and obtained. The problem of elbow specific information
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[0042] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.
[0043] See figure 1 , a specific embodiment of the present invention discloses a method for detecting an elbow based on mileage and attitude information, comprising the following steps:
[0044] Step S1. Obtain multi-channel original mileage data of the area to be detected, and accumulate the absolute value of the difference between the multi-channel original mileage data to obtain the cumulative difference; filter the cumulative difference according to the elbow length threshold to obtain the preliminary elbow interval;
[0045] Step S2. Obtain the triaxial attitude information in the prelim...
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The invention relates to an elbow detection method based on mileage and attitude information, belongs to the technical field of nondestructive testing, and solves the problem that elbow information in a small-caliber pipeline product cannot be accurately detected and obtained in the prior art. The elbow detection method comprises the following steps: acquiring multiple paths of original mileage data of an area to be detected, and accumulating absolute values of differences between every two paths of original mileage data to obtain accumulated differences; the accumulated difference is screened according to an elbow length threshold value, and a preliminary elbow interval is obtained; three-axis attitude information in the initial elbow interval is obtained, and whether the elbow is a non-space elbow or a space elbow is judged based on a set angle threshold value; if the elbow is a non-space elbow, the information of the elbow is obtained according to the three-axis attitude information; and if the elbow is a space elbow, acquiring information of the elbow according to the three-axis attitude information and coordinate transformation. The positioning identification of the elbow in a small-caliber pipeline product and the detection of elbow information are realized.
Description
technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to an elbow detection method based on mileage and attitude information. Background technique [0002] Pipeline elbows are commonly found in long-distance pipelines and are mainly used to change the direction of medium transmission. Due to the angular offset between them and straight pipelines and the existence of fixed interfaces, they are more susceptible to medium impact than straight pipes to a certain extent. The possibility of impact leading to corrosion and cracking increases. [0003] The positioning and identification of elbows is extremely important in the field of non-destructive testing. Most of the existing monitoring and positioning methods for elbows are based on information such as trajectory mapping. [0004] For small-diameter pipe products, the trajectory mapping module cannot be installed due to the limited volume. In order to accurately identify ...
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IPC IPC(8): G01C22/00G01C21/16
CPCG01C22/00G01C21/16
Inventor 付子航郑莉王秀林刚蓓姚辉超韩银杉刘思娇穆祥宇尹紫曦冯亮刘方杨玉霞
Owner CNOOC GAS & POWER GRP