Unlock instant, AI-driven research and patent intelligence for your innovation.

A method and system for detecting parameters of metal pipelines

A technology for metal pipelines and pipelines, applied in the field of detecting metal pipeline parameters

Active Publication Date: 2017-02-15
CHINA NAT OFFSHORE OIL CORP +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the use of electromagnetic methods to measure the inner diameter of pipes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method and system for detecting parameters of metal pipelines
  • A method and system for detecting parameters of metal pipelines
  • A method and system for detecting parameters of metal pipelines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1. A method for detecting parameters of a metal pipeline, the parameters including the inner diameter CID of the pipeline and the electromagnetic property PEM of the pipeline; the method includes the following steps S101 to S103.

[0072] S101. Put two detection coils and one transmitting coil into the pipeline to be detected, the two detection coils and one transmitting coil are placed coaxially with the pipeline to be detected, and the transmitting coil is located between the two detection coils. Between the coils, and the same distance from the two detection coils;

[0073] S102. Establish a functional relational expression between the electromagnetic propagation impedance and the inner diameter of the pipeline CID and the electromagnetic attribute PEM; obtain a definite function and a functional relational expression between CID and PEM through double-parameter fitting of CID and PEM; the definite function includes the electromagnetic The expressions of p...

Embodiment 2

[0171] Embodiment 2. A system for detecting parameters of metal pipelines, the parameters include pipeline inner diameter CID and pipeline electromagnetic properties PEM; the system includes:

[0172] Two detection coils and one transmitting coil are placed in the pipeline to be detected, the two detection coils and one transmitting coil are placed coaxially with the pipeline to be detected, and the transmitting coil is located between the two detection coils between, and the same distance from the two detection coils;

[0173] The detection unit is used to apply an excitation signal on the transmitting coil, and actually detect the actual detection value Zex of the electromagnetic propagation impedance;

[0174] The processing unit is used to establish the functional relationship between the electromagnetic propagation impedance and the inner diameter of the pipeline CID and the electromagnetic property PEM; through CID and PEM double parameter fitting, the functional relatio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method and system for detecting metal pipeline parameters. The method includes the steps that two detecting coils and a transmitting coil are placed in a pipeline to be detected and are coaxially arranged with the pipeline to be detected, the transmitting coil is located between the two detecting coils, and the distances between the transmitting coil and the two detecting coils are equal; a function relation formula between electromagnetic transmission impedance and the pipeline inner diameter CID and the electromagnetic property PEM is established; a function relation formula between a determined function and the CID and PEM is obtained through double parameter fitting of the CID and the PEM; Zth is obtained through simulation of the detection process, and Zex is obtained through imposing an excitation signal on the transmitting coil and actual detection; a first function value and a second function value are obtained through substituting the Zth and the Zex into the determined function; the CID and the PEM enabling the difference between the first function value and the second function value to be the smallest are solved to serve as the detection result. By means of the method and system for detecting metal pipeline parameters, the inner diameter and the electromagnetic property of the metal pipeline can be detected at the same time, and accuracy and precision of the detection result can be improved.

Description

technical field [0001] The invention relates to the field of eddy current detection, in particular to a method and system for detecting parameters of metal pipelines. Background technique [0002] In the field of inversion algorithms for physical properties of metal pipelines, the most common method is to use traditional eddy current testing principles to obtain information including physical properties of pipelines. Eddy current electromagnetic field testing is a complex calculation process, and it is necessary to select appropriate and simplified algorithms to invert pipeline physical parameter value. At present, the test and calculation methods of pipeline physical properties mainly have problems such as complex parameter models, strong parameter mutual interference, difficult calculation, and unsatisfactory result accuracy. [0003] In the prior art, when obtaining the measurement value of the inner diameter of the pipeline, it is generally obtained through multiple mec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01B15/00G01R33/12
Inventor 陶爱华王志刚刘西恩师奕斌张伟李焱俊
Owner CHINA NAT OFFSHORE OIL CORP