Pipeline alignment detection method
A detection method and pipeline technology, applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve problems such as the inability to apply submarine pipeline detection, and achieve the effect of eliminating manual carrying, convenient detection, and avoiding scanning blind spots.
Inactive Publication Date: 2014-01-29
TIANJIN UNIV
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Problems solved by technology
[0006] Most of the existing land pipelines use metal pipeline detectors, which are carried by people to scan and detect the direction of pipelines on the ground near known pipelines. Usually, the general location of the pipeline needs to be known before the detection can be carried out. Similarly, this method cannot be applied to the detection of submarine pipelines.
In short, there is currently no very suitable method to meet the needs of submarine and land pipeline direction detection
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[0053] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0054]101: Put the electrified spherical inner detector into the pipe pig launch tube at the head end of the pipe section to be tested, and launch the spherical inner detector into the pipeline according to the pipe pig delivery process, driven by the oil in the pipe scroll;
[0055] 102: During the rolling process, the IMU inertial measurement unit 20 of the spherical inner detector collects the acceleration signal, angular velocity signal and geomagnetic field signal of the spherical inner detector rolling; the ARM processor records the time information, and the collected four kinds of information Store in the Micro SD memory card 16;
[0056] 103: According to the average flow velocity of the oil in the pipeline and the length of t...
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The invention relates to a pipeline alignment detection method, which comprises the steps of: obtaining an acceleration signal, an angular velocity signal, a geomagnetic field signal and time information by a spherical internal detector; processing the acceleration signal, the angular velocity signal and the geomagnetic field signal, and respectively obtaining a relationship diagram of the amplitude of the acceleration signal and the time, a relationship diagram of the amplitude of the Euler angle and the time and a relationship diagram of the amplitude of the magnetic field signal and the time; and determining alignment of every section of an oil delivery pipeline according to the relationship diagram of the amplitude of the acceleration signal and the time, the relationship diagram of the amplitude of the Euler angle and the time and the relationship diagram of the amplitude of the magnetic field signal and the time. By adopting the method, blind spots for scanning can be avoided effectively, detection can be performed more conveniently and rapidly, and the detection accuracy is higher. The method is suitable for detection of submarine pipelines and pipelines in a complex pipeline network, and the scope of practical applications can be expanded.
Description
technical field [0001] The invention relates to the detection of pipelines, in particular to a detection method for the direction of pipelines. Background technique [0002] As one of the important methods of modern fluid transportation, pipeline transportation is widely used in the fields of oil and gas industry, chemical industry and water supply industry. Timely and accurate pipeline damage detection is the basic guarantee for pipeline safety and efficient operation. After the pipeline is put into production, it is necessary to use the in-line detector to track and detect its technical status, so that it can be found in time and repaired proactively before the pipeline leaks. In order to maintain the pipeline according to the detection information of the detector in the pipeline, it is necessary to know the precise position of the pipeline, so as to avoid the blindness of on-site excavation and maintenance. [0003] Domestic land pipelines are equipped with marking piles...
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IPC IPC(8): F17D5/02
Inventor 陈世利高春倩郭世旭黄新敬王正锋
Owner TIANJIN UNIV