Bent angle testing method for pipeline
A technology of bending angle and testing method, which is applied in the direction of measuring devices, instruments, and optical devices, etc., can solve the problems of increased deformation of the pipe body, too many equipment, and the inability to obtain the deformation angle of the pipe section, etc., and achieve the effect of simple operation and convenient data processing
Inactive Publication Date: 2015-04-08
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
This method requires more equipment and needs to install measuring objects on the pipe body, which will add additional influence to the deformation of the pipe body
At the same time, the calculated angle is the average bending angle of the pipe segment, and the local deformation angle of the pipe segment cannot be obtained
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[0026] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0027] The invention discloses a method for testing the bending angle of a pipeline, which comprises the following steps:
[0028] 1) On the outer top wall of the pipeline to be tested, N feature points are uniformly distributed along the pipeline longitudinal direction, and N is a natural number ≥ 3;
[0029] 2) N shooting devices capable of real-time positioning and taking pictures of the feature points described in step 1) are correspondingly arranged on the top wall of the tube to be tested;
[0030] 3) Define three adjacent feature points as D i 、D i+1 、D i+2 , and i=1, 2, 3...N-2; obtain the photographs of three adjacent feature points taken, and obtain the corresponding position data by measuring the relative positions of the feature points in the photographs, and then according to ...
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The invention discloses a bent angle testing method for a pipeline, belonging to the technical field of petroleum pipeline engineering. According to the technical scheme, the bent angle testing method comprises the following steps: arranging a plurality of characteristic points on a pipeline body to be tested; acquiring real-time positions of the characteristic points through photographing equipment; calculating information, such as the bent angle of an experimental body, through the change of reference positions of the characteristic points in different moments. The method disclosed by the invention can be used for finishing real-time measurement of the bending situation of the pipeline body more rapidly by using a simple mathematic Pythagorean theorem and an imaging principle; in the meantime, measurement data can be acquired without being limited by time and environment; in addition, the data post-processing can be conveniently carried out. The bent angle testing method is simple to operate and applicable to field testing of large-scale high risk experiments.
Description
technical field [0001] The invention belongs to the technical field of petroleum pipeline engineering, and in particular relates to a method for testing the bending angle of a pipeline. Background technique [0002] In recent years, oil and gas pipeline transportation technology has developed rapidly in the direction of high pressure and large diameter. There are many tests on oil and gas pipelines, such as water explosion test, full-scale bending test, pipeline monitoring, etc. These tests all involve knowledge of pipe or pipeline bend data. Due to the large size of the pipe body or pipeline, the method of obtaining the measurement method of its deformation is more complicated, the equipment installation is complicated, and even the real-time measurement process is more harmful to the safety of personnel. [0003] The test method for pipeline curvature reported in the prior art is to add a set of baffles on the pipe section, and pull out two measuring lines, La and Lb, in ...
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IPC IPC(8): G01B11/26
Inventor 黄呈帅秦长毅张华卫尊义李东风杨鹏吉玲康池强陈宏远樊治海
Owner BC P INC CHINA NAT PETROLEUM CORP