Post-treatment integrated navigation method for surveying and mapping track of oil-gas pipeline

Abstract

The invention provides a post-treatment integrated navigation method for surveying and mapping a track of an oil-gas pipeline. The post-treatment integrated navigation method provided by the invention comprises the following steps: carrying out integrated navigation and strap-down inertial navigation / dead reckoning combined navigation on a position without a GPS (Global Position System) modification point through strap-down inertial navigation, dead reckoning and GPS signals at a fixed point; at the GPS modification point, carrying out strap-down inertial navigation / dead reckoning / GPS combined navigation; compensating an error of a strap-down inertial navigation system, an attitude angle error and a scale factor error of a speedometer by using a kalman filter; meanwhile, utilizing a characteristic of processing non-instantaneity by system data, so as to repeatedly estimate and compensate various error items of the system until the system error is less than a set threshold value. Therefore, the system positioning precision is effectively improved, and the actual engineering requirements can be met.

Description

technical field [0001] The invention relates to a post-processing combined navigation method for track surveying and mapping of oil and gas pipelines, in particular to a post-processing method for track surveying and mapping using an inertial measurement device in a special environment for track surveying and mapping of long-distance oil and gas pipelines. Background technique [0002] With the rapid development of my country's national economy, the construction of oil and gas pipelines has entered a peak period. As the most economical and reasonable transportation method for oil and natural gas, pipelines have the advantages of safety, environmental protection, high efficiency and energy saving. Because oil and natural gas are flammable, explosive and toxic, the safe operation of pipelines is very important. After oil and gas pipelines have been in service for a long time, failure accidents will occur due to external interference, corrosion, pipe material and construction q...

AI Technical Summary

Problems solved by technology

However, in the existing technology, there are problems of large measurement errors and low accuracy, which lead to the positioning accuracy not meeting the requirements of engineering use

This is very inconvenient for pipeline owners to effectively monitor whether their pipelines have potential safety hazards, whether there are pipeline displacements caused by earthquakes, soil collapse, and artificial surface operations. At the same time, it cannot provide pipeline owners with important basic data for integrity management, namely pipelines Toward detection data

Images