High-Precision Inversion of Buried Depth Inurban Underground Iron Pipelines Based on Am-Pso Algorithmfor Magnetic Anomaly

Abstract

Buried iron pipeline is an important part of urban infrastructure. In order to accurately obtain the location information of buried iron pipeline, here, we establish a forward model of magnetic anomaly in buried iron pipeline based on magnetic dipole reconstruction (MDR) method that determines four inversion parameters and two inversion objective functions. The vertical magnetic field data with different proportion noises are taken as observation values respectively to invert the parameters of underground pipeline and its location (buried depth) by using the AM-PSO (adaptive mutation particle swarm optimization) inversion algorithm. The errors of inversion and observation of vertical magnetic field are compared by substituting the inversion parameters into forward formulas. The results show that the AM-PSO inversion algorithm can accurately invert the pipeline depth, and the inversion error of the pipeline depth is less than 5%, which is acceptable in practical engineering. The inversion of the vertical magnetic field can basically coincide with the observed vertical magnetic field of the original model. At the same time, it is verified that the AM-PSO inversion algorithm is insensitive to magnetic anomaly noise data. In this study, the effectiveness of AM-PSO inversion algorithm method for pipeline depth inversion is analyzed, and an effective optimization inversion method is provided for underground iron pipeline depth inversion.

Research on Perspective Imaging Method of Building Structure Based on Multipath Information

“…The most typical means of using the propagation characteristics of electromagnetic waves to obtain information about the internal structure of a building is the through-wall radar imaging method [2,3], whose transceiver mode is generally the antenna located on the same outside of the building, using the reflected echo information collected by the motion transceiver antenna involved in the role of the internal scene of the building to complete the perspective imaging of the internal structure. At present, the main use of reflected wave signals through the wall imaging methods is mainly reverse projection algorithm, time inversion algorithm [4], compression perception algorithm, and inverse scattering transformation method.…”

A localization method for subsea pipeline based on active magnetization

“…For a long time, AUVs and surveying vessels have been equipped with magnetometers to identify subsea pipelines in an offline form. They scan the seabed over a large area, collect magnetic data at many grid points and run complex offline algorithms to identify the magnetic anomalies of subsea pipelines [12][13][14][15][16]. Few of these studies directly focus on real-time tracking of subsea pipelines.…”