Granted Patent B1

US 12,270,786 · App. 18/977,341 · Granted Apr 8, 2025

Inventors: Maodan Yuan (Guangzhou, CN); Ruiyu Zhu (Guangzhou, CN); Yongfeng Song (Guangzhou, CN); Xuanrong Ji (Guangzhou, CN); Yan Chen (Guangzhou, CN)

Assignee: GUANGDONG UNIVERSITY OF TECHNOLOGY

G01N29/041G01N17/04G01N2291/0234G01N2291/0427

Abstract

Claims (40)

1. A method for measuring pipeline corrosion, comprising:

obtaining a material property of a to-be-detected pipeline, and calculating a theoretical dispersion curve of the to-be-detected pipeline based on the material property;

determining a theoretical frequency-thickness product and a theoretical frequency of a zero-group-velocity (ZGV) Lamb wave mode from the theoretical dispersion curve;

obtaining a target excitation signal corresponding to the theoretical frequency;

sending the target excitation signal to the to-be-detected pipeline and receiving a target waveform, wherein the target waveform is obtained by reflecting the target excitation signal through the to-be-detected pipeline;

determining an actual frequency of the ZGV Lamb wave mode from the target waveform; and

calculating corrosion of the to-be-detected pipeline based on the theoretical frequency-thickness product and the actual frequency of the ZGV Lamb wave mode.

2. The method according to claim 1 , wherein the sending the target excitation signal to the to-be-detected pipeline and receiving a target waveform specifically comprises:

using an element of a linear phased array probe to send the target excitation signal to the to-be-detected pipeline and receive the target waveform, wherein

the linear phased array probe is equipped with a plurality of elements, and a quantity of target waveforms is consistent with a quantity of the elements.

3. The method according to claim 2 , wherein the determining an actual frequency of the ZGV Lamb wave mode from the target waveform specifically comprises:

determining the actual frequency of the ZGV Lamb wave mode from each group of target waveforms to obtain a plurality of groups of formant center frequencies of the ZGV Lamb wave mode.

4. The method according to claim 3 , wherein the calculating corrosion of the to-be-detected pipeline based on the theoretical frequency-thickness product and the actual frequency of the ZGV Lamb wave mode specifically comprises:

calculating a thickness based on each of the plurality of groups of formant center frequencies of the ZGV Lamb wave mode and the theoretical frequency-thickness product to obtain a plurality of groups of thickness values; and

fitting the plurality of groups of thickness values to obtain the corrosion thickness of the to-be-detected pipeline.

5. The method according to claim 4 , wherein a calculation formula of the thickness is as follows:

d

e

=

f

t

⁢

d

t

f

e

wherein f t d t represents the theoretical frequency-thickness product, f e represents the actual frequency of the ZGV Lamb wave mode, and d e represents the thickness value.

6. A device for measuring pipeline corrosion, comprising:

a first obtaining module configured to obtain a material property of a to-be-detected pipeline, and calculate a theoretical dispersion curve of the to-be-detected pipeline based on the material property;

a first determining module configured to determine a theoretical frequency-thickness product and a theoretical frequency of a ZGV Lamb wave mode from the theoretical dispersion curve;

a second obtaining module configured to obtain a target excitation signal corresponding to the theoretical frequency;

an excitation module configured to send the target excitation signal to the to-be-detected pipeline and receive a target waveform, wherein the target waveform is obtained by reflecting the target excitation signal through the to-be-detected pipeline;

a second determining module configured to determine an actual frequency of the ZGV Lamb wave mode from the target waveform; and

a calculation module configured to calculate corrosion of the to-be-detected pipeline based on the theoretical frequency-thickness product and the actual frequency of the ZGV Lamb wave mode.

7. The device according to claim 6 , wherein the excitation module is specifically configured to use an element of a linear phased array probe to send the target excitation signal to the to-be-detected pipeline and receive the target waveform, wherein the linear phased array probe is equipped with a plurality of elements, and a quantity of target waveforms is consistent with a quantity of the elements.

8. The device according to claim 7 , wherein the second determining module is specifically configured to determine the actual frequency of the ZGV Lamb wave mode from each group of target waveforms to obtain a plurality of groups of formant center frequencies of the ZGV Lamb wave mode.

9. The device according to claim 8 , wherein the calculation module specifically comprises:

a thickness value calculation subunit configured to calculate a thickness based on each of the plurality of groups of formant center frequencies of the ZGV Lamb wave mode and the theoretical frequency-thickness product to obtain a plurality of groups of thickness values; and

a fitting subunit configured to fit the plurality of groups of thickness values to obtain the corrosion thickness of the to-be-detected pipeline.

10. A system for measuring pipeline corrosion, comprising: a linear phased array probe, a phased array board, and a controller, wherein the phased array board is connected to the linear phased array probe, and the controller is respectively connected to the phased array board and the linear phased array probe; and the system is configured to perform the method according to claim 1 .

Assignments (1)

Priority Claims (1)

References Cited (12)