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

Calibration sample tube and calibration method for ultrasonic guided wave detection of pipeline defect axial width

A technology of axial width and ultrasonic guided wave, which is applied in the direction of material analysis, measuring device and instrument using sound wave/ultrasonic wave/infrasonic wave, so as to improve the detection accuracy

Active Publication Date: 2021-05-07
泰安市特种设备检验研究院
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This method only considers the influence of the ratio of the cross-sectional area of ​​the defect on the reflection amplitude, and the corresponding relationship between the reflection amplitude and the ratio of the cross-sectional area of ​​the defect is only applicable when the detection wavelength is much larger than the axial width of the defect. When the magnitude is similar to the detection wavelength, the ratio of the reflection amplitude and axial width to the detection wavelength has a certain functional relationship

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
  • Calibration sample tube and calibration method for ultrasonic guided wave detection of pipeline defect axial width
  • Calibration sample tube and calibration method for ultrasonic guided wave detection of pipeline defect axial width
  • Calibration sample tube and calibration method for ultrasonic guided wave detection of pipeline defect axial width

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 , figure 2 As shown, the ultrasonic guided wave testing of the axial width of pipeline defects calibrates the sample tube, including the sample tube. The sample tube contains eight circumferential grooves at axial equidistant distances. The axial lengths of the eight circumferential grooves are 1 mm, 3 mm, respectively. 6.25mm, 12.5mm, 25mm, 50mm, 100mm and 200mm, the distance between the first circumferential groove and the left end of the sample tube is 0.3m, the distance between the eighth circumferential groove and the right end of the sample tube is 0.3m, and the center of each circumferential groove is the smallest The spacing is 0.3m.

[0040] The minimum depth of the eight circumferential grooves is 3% of the wall thickness of the pipe section and the depth error should be less than 5%.

Embodiment 2

[0042] Such as figure 1 , figure 2 As shown, the ultrasonic guided wave testing of the axial width of pipeline defects calibrates the sample tube, including the sample tube. The sample tube contains eight circumferential grooves at axial equidistant distances. The axial lengths of the eight circumferential grooves are 1 mm, 3 mm, respectively. 6.25mm, 12.5mm, 25mm, 50mm, 100mm and 200mm, the distance between the first circumferential groove and the left end of the sample tube is 0.5m, the distance between the eighth circumferential groove and the right end of the sample tube is 0.5m, and the center of each circumferential groove is the smallest The spacing is 0.5m.

[0043] The minimum depth of the eight circumferential grooves is 3% of the wall thickness of the pipe section and the depth error should be less than 5%.

[0044] The minimum spacing between the centers of each circumferential groove (m) 0.3m 0.5m Amplitudes of echo signals at three frequencies...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a calibration sample tube for ultrasonic guided wave detection of the axial width of pipeline defects, relates to the ultrasonic guided wave detection technology of pipelines, and is used to solve the corresponding relationship between the reflected wave amplitude and the proportion of the cross-sectional area of ​​the defect. Problem in case of defect axial width. It includes a sample tube, the sample tube contains eight axially equidistant circumferential grooves, and the axial lengths of the eight circumferential grooves are 1mm, 3mm, 6.25mm, 12.5mm, 25mm, 50mm, 100mm and 200mm, the distance between the first circumferential groove and the left end of the sample tube is 0.2-0.6m, the distance between the eighth circumferential groove and the right end of the sample tube is 0.2-0.6m, and the minimum distance between the centers of the circumferential grooves is 0.2 ~ 0.6m. The technical scheme aims at the corrosion defect of the pipe wall, and accurately evaluates the severity of the pipe defect. The invention also discloses a method for calibrating a sample pipe for ultrasonic guided wave detection and calibrating of the axial width of the pipeline defect.

Description

technical field [0001] The invention relates to a pipeline ultrasonic guided wave detection technology, specifically, a calibration sample tube and a calibration method for ultrasonic guided wave detection of the axial width of a pipeline defect. Background technique [0002] Ultrasonic guided wave testing technology is a non-destructive testing technology for long-distance pipelines. It has the advantages of fast detection speed, long detection distance and high detection accuracy, and can quickly reflect changes in the circumferential wall thickness of pipelines in a long range. It is widely used in process piping. In order to accurately assess the safety status of the detected object, GB / T 28704-2012 "Nondestructive Testing Magnetostrictive Ultrasonic Guided Wave Testing Method" proposes a defect hazard assessment method based on the distance-amplitude curve. This method uses The distance-amplitude curve is made for the comparison test piece provided in this standard, an...

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): G01N29/30
CPCG01N29/30G01N2291/0289G01N2291/044G01N2291/262
Inventor 刘剑锋胡栋张义磊翟永军苏光军
Owner 泰安市特种设备检验研究院