Optimal inversion of buried deep magnetic dipole structure method for underground iron pipelines

Abstract

The invention relates to an optimized inversion of an underground iron pipeline burial depth magnetic doublet structured approach, and particularly relates to an optimized inversion calculation method of the underground iron pipeline burial depth in forward modeling on the basis of a magnetic doublet structured approach. The method includes steps of setting up magnetic anomaly detection data pretreatment, ground magnetic field positioning inquiry, and inversion searching model parameter replacement; simplifying 12 forward modeling parameters to two unknown model parameters which are burial depth and magnetic susceptibility. The two unknown model parameters of burial depth and magnetic susceptibility are used as global optimized inversion solving parameters, the burial depth and magnetic susceptibility acquired through the inversion for the first time are used as a reference point of the second inversion parameter searching scale; the inversion searching is carried out again for many time within a new searching scale; the mean value of the inversion of the burial depth is used as the optimized inversion result of the underground iron pipeline burial depth. The optimized inversion of the underground iron pipeline burial depth magnetic doublet structured approach considers about the forward modeling calculation rate and precision; the inversion solution is quick, and the accuracy is high.

Description

technical field [0001] The invention relates to a method for solving the burial depth of buried iron pipelines by using the inversion of detection magnetic anomaly signals, in particular to the optimized inversion of the underground iron pipeline burial depth magnetic dipole structure method. Background technique [0002] Underground iron pipelines mainly include sewage, rainwater, water supply, cable, gas, telecommunication, electric power and oil pipelines, which provide basic guarantee for national industrial production and urban residents' life. [0003] With the development of social economy and the increase in the number of underground iron pipelines, the cost of construction, maintenance and management is getting higher and higher, so the detection of underground pipelines is becoming more and more important. With the continuous development and improvement of technology, there are self-adapted detection methods for various pipelines, and the difficulty of survey const...

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Problems solved by technology

Other methods using magnetic data processing to estimate the depth of the magnetic source model mainly include Werner deconvolution method, analytical signal, Euler deconvolution method, local wavenumber method, and source parameter imaging method, etc. These methods have not been used in the detection of buried iron pipelines. For deep computing applications, it is impossible to know how accurate it is

[0005] There are few methods to solve the burial depth of underground iron pipelines based on magnetic anomaly inversion. The previous research report of this invention uses genetic algorithm to perform burial depth inversion based on four inversion parameters, but this method needs to be carried out for pipelines with shallower burial depths. Divided into block units, the inversion takes a long time

Other related magnetic anomaly inversion methods have not been applied to the inversion of underground iron pipeline detection, and its effectiveness cannot be judged

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