A pipeline surveying and mapping and defect location device based on mems inertial measurement unit and its pipeline surveying and mapping and defect location method

Abstract

The invention belongs to the technical field of pipeline surveying and mapping, and in particular relates to an MEMS (Micro Electro Mechanical System) inertial measurement unit-based pipeline surveying and mapping and defect positioning device and a pipeline surveying and mapping and defect positioning method thereof. The MEMS inertial measurement unit-based pipeline surveying and mapping and defect positioning device comprises a measurement unit, a correction unit, a defect detection unit, a power supply unit and a data processing and memory unit. Compared with the conventional inventions and papers and the like, the MEMS inertial measurement unit is lower in cost, and has a wider pipe diameter application range of being 60 mm at minimum besides the autonomy. The MEMS inertial measurement unit is combined with an odometer, a flux-gate magnetometer and an ultrasonic detection device. The pipeline surveying and mapping problem without laying a fixed-point magnetic scale is solved, meanwhile, the information on a defect position is detected and marked, and convenience is provided for the maintenance and strengthening of pipeline defects. An odometer wheel is also connected with a power generation device, so that the problems caused by external power supply are solved.

Description

technical field [0001] The invention belongs to the technical field of pipeline surveying and mapping, and in particular relates to a pipeline surveying and mapping and defect location device based on a MEMS inertial measurement unit and a method for pipeline surveying and mapping and defect location. Background technique [0002] According to the statistics of the US Central Intelligence Agency's "World Documentary Yearbook", there were 3,559,186 kilometers of pipelines in operation around the world in 2013. If the circumference of the equator is 40,075.04 kilometers, then oil and gas pipelines can circle the earth 88 times. As of the first half of 2012, the total length of China's oil and gas pipelines reached 93,000 kilometers, while in 2004 the total length of my country's oil and gas pipelines was less than 30,000 kilometers. It is estimated that by 2015, the total length of my country's oil and gas pipelines will reach about 150,000 kilometers. The oil and gas pipelin...

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Problems solved by technology

[0005] In the search of relevant information, it was found that there was a patent in 2007 "Underground Pipeline Measurement System and Its Measurement Method Based on Inertial Technology" that was most similar to that described in the present invention, and the method described in the invention is also the method used by most pipeline surveying and mapping , but it still has certain defects, and is limited to the pipelines that must be laid with fixed-point magnetic markers, and the fixed-point magnetic markers are not set when laying long-term pipelines. The present invention mainly solves the problems of such pipeline surveying and defect location question

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