CN109324122B - C-type display method for longitudinal wave vertical flaw detection method of hollow shaft - Google Patents
C-type display method for longitudinal wave vertical flaw detection method of hollow shaft Download PDFInfo
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- CN109324122B CN109324122B CN201710636127.6A CN201710636127A CN109324122B CN 109324122 B CN109324122 B CN 109324122B CN 201710636127 A CN201710636127 A CN 201710636127A CN 109324122 B CN109324122 B CN 109324122B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
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Abstract
The invention discloses a C-type display method for a longitudinal wave vertical flaw detection method for a hollow shaft, which belongs to the technical field of ultrasonic flaw detection, adopts two gates for flaw detection, and solves the problem that the C-type display of ultrasonic waves cannot correctly display artificial defects when the flaw detection is carried out by adopting a longitudinal wave vertical incidence flaw detection method; the invention can automatically judge and set the flaw detection gate (3) of the bottom echo gate (2) according to different wall thickness positions of the hollow shaft, and has high automation degree.
Description
Technical Field
The invention belongs to the technical field of ultrasonic flaw detection.
Background
At present, when a CRH type hollow shaft of a motor car and an HXD1D type hollow shaft of a locomotive are subjected to ultrasonic automatic flaw detection, a transverse wave oblique incidence flaw detection method and a longitudinal wave vertical incidence flaw detection method are used.
When flaw detection is performed by a longitudinal wave vertical incidence flaw detection method, artificial flaws cannot be accurately displayed by ultrasonic C-mode display.
Disclosure of Invention
The invention aims to provide a C-type display method for a longitudinal wave vertical flaw detection method of a hollow shaft, which solves the problem that the C-type display of ultrasonic waves cannot accurately display artificial defects when a longitudinal wave vertical incidence flaw detection method is adopted for flaw detection.
In order to achieve the purpose, the invention adopts the following technical scheme:
a C-type display method for a longitudinal wave vertical flaw detection method of a hollow shaft comprises the following steps:
step 1: connecting an ultrasonic detector with a computer, and setting a surface echo voltage and a defect echo voltage in the computer, wherein the surface echo voltage is a peak voltage value generated when an ultrasonic probe of the ultrasonic detector receives an echo on the surface of the inner ring of the hollow shaft, and the defect echo voltage is a peak voltage value generated when the ultrasonic probe of the ultrasonic detector receives an echo of a defect in the hollow shaft;
step 2: detecting a group of flaw detection points on the surface of the outer ring of the hollow shaft by using an ultrasonic probe of an ultrasonic detector, wherein the connecting lines of the group of flaw detection points are spiral lines;
and step 3: when the ultrasonic probe reaches any one flaw detection point, the ultrasonic probe sends longitudinal waves to the hollow shaft for detection;
and 4, step 4: the ultrasonic detector processes the real-time voltage value generated by the ultrasonic probe into digital voltage data and sends the digital voltage data to the computer;
and 5: the computer compares the digital voltage data with the surface echo voltage, and when the digital voltage data is not less than the surface echo voltage, the computer sets a bottom echo gate according to the digital voltage data;
step 6: the computer sets a flaw detection gate according to the bottom echo gate, and the highest voltage value of the flaw detection gate is smaller than the lowest voltage value of the bottom echo gate;
and 7: the ultrasonic probe sends longitudinal waves to the hollow shaft again for detection;
and 8: the ultrasonic detector processes the real-time voltage value generated by the ultrasonic probe into digital voltage data and sends the digital voltage data to the computer;
and step 9: the computer judges whether the digital voltage data is in a flaw detection gate: if yes, recording the artificial defect; if not, no record is made;
step 10: repeating the steps 3 to 9, and completing the detection of all flaw detection points;
step 11: and displaying all artificial defects by a computer in a C-type display mode.
The hollow shaft is a CRH type hollow shaft of the motor car.
The hollow shaft is a mechanical HXD1D hollow shaft.
The C-type display method for the longitudinal wave vertical flaw detection method of the hollow shaft solves the problem that the C-type display of ultrasonic waves cannot correctly display artificial defects when the longitudinal wave vertical incidence flaw detection method is adopted for flaw detection; the invention can automatically judge and set the bottom echo gate and the flaw detection gate, and has high automation degree.
Drawings
FIG. 1 is a diagram of the motion trajectory of an ultrasound probe of the present invention;
FIG. 2 is a schematic view of a bottom echo gate and a flaw detection gate of the present invention;
FIG. 3 is a schematic waveform of the surface echo voltage and the defect echo voltage of the present invention;
in the figure: the device comprises a flaw detection point 1, a bottom echo gate 2, a set flaw detection gate 3, a flaw echo voltage 4, a surface echo voltage 5 and a hollow shaft 6.
Detailed Description
A C-type display method for vertical wave flaw detection of a hollow shaft as shown in fig. 1 to 3, comprising the steps of:
step 1: connecting an ultrasonic detector with a computer, and setting a surface echo voltage 5 and a defect echo voltage 4 in the computer, wherein the surface echo voltage 5 is a peak voltage value generated when an ultrasonic probe of the ultrasonic detector receives an echo on the inner ring surface of a hollow shaft 6, and the defect echo voltage 4 is a peak voltage value generated when the ultrasonic probe of the ultrasonic detector receives an echo of a defect in the hollow shaft 6;
step 2: detecting a group of flaw detection points 1 on the outer ring surface of the hollow shaft 6 by using an ultrasonic probe of an ultrasonic detector, wherein the connecting lines of the group of flaw detection points 1 are spiral lines;
and step 3: when the ultrasonic probe reaches any one flaw detection point 1, the ultrasonic probe sends longitudinal waves to the hollow shaft 6 for detection;
and 4, step 4: the ultrasonic detector processes the real-time voltage value generated by the ultrasonic probe into digital voltage data and sends the digital voltage data to the computer;
and 5: the computer compares the digital voltage data with the surface echo voltage 5, and when the digital voltage data is not less than the surface echo voltage 5, the computer sets a bottom echo gate 2 according to the digital voltage data;
step 6: the computer sets a flaw detection gate 3 according to the bottom surface echo gate 2, and the highest voltage value of the flaw detection gate 3 is smaller than the lowest voltage value of the bottom surface echo gate 2;
and 7: the ultrasonic probe sends longitudinal waves to the hollow shaft 6 again for detection;
and 8: the ultrasonic detector processes the real-time voltage value generated by the ultrasonic probe into digital voltage data and sends the digital voltage data to the computer;
and step 9: the computer judges whether the digital voltage data is in the flaw detection gate 3: if yes, recording the artificial defect; if not, no record is made;
step 10: repeating the steps 3 to 9, and completing the detection of all the flaw detection points 1;
step 11: and displaying all artificial defects by a computer in a C-type display mode.
The hollow shaft 6 is a CRH type hollow shaft of a motor car or an HXD1D type hollow shaft of a locomotive.
According to the C-type display method for the longitudinal wave vertical flaw detection method for the hollow shaft, which is disclosed by the invention, flaw detection is carried out by adopting two gates, so that the problem that the artificial defects cannot be correctly displayed by the C-type display of ultrasonic waves when flaw detection is carried out by adopting a longitudinal wave vertical incidence flaw detection method is solved; the invention can automatically judge and set the bottom echo gate 2 and the flaw detection gate 3 according to different wall thickness positions of the hollow shaft, and has high automation degree.
Claims (3)
1. A C-type display method for a longitudinal wave vertical flaw detection method of a hollow shaft is characterized by comprising the following steps: the method comprises the following steps:
step 1: connecting an ultrasonic detector with a computer, and setting a surface echo voltage (5) and a defect echo voltage (4) in the computer, wherein the surface echo voltage (5) is a peak voltage value generated when an ultrasonic probe of the ultrasonic detector receives an echo on the surface of the inner ring of a hollow shaft (6), and the defect echo voltage (4) is a peak voltage value generated when the ultrasonic probe of the ultrasonic detector receives an echo of a defect in the hollow shaft (6);
step 2: detecting a group of flaw detection points (1) on the outer ring surface of the hollow shaft (6) by using an ultrasonic probe of an ultrasonic detector, wherein the connecting line of the group of flaw detection points (1) is a spiral line;
and step 3: when the ultrasonic probe reaches any flaw detection point (1), the ultrasonic probe sends longitudinal waves to the hollow shaft (6) for detection;
and 4, step 4: the ultrasonic detector processes the real-time voltage value generated by the ultrasonic probe into digital voltage data and sends the digital voltage data to the computer;
and 5: the computer compares the digital voltage data with the surface echo voltage (5), and when the digital voltage data is not less than the surface echo voltage (5), the computer sets a bottom echo gate (2) according to the digital voltage data;
step 6: the computer sets a flaw detection gate (3) according to the bottom echo gate (2), and the highest voltage value of the flaw detection gate (3) is smaller than the lowest voltage value of the bottom echo gate (2);
and 7: the ultrasonic probe sends longitudinal waves to the hollow shaft (6) again for detection;
and 8: the ultrasonic detector processes the real-time voltage value generated by the ultrasonic probe into digital voltage data and sends the digital voltage data to the computer;
and step 9: the computer judges whether the digital voltage data is in the flaw detection gate (3): if yes, recording the artificial defect; if not, no record is made;
step 10: repeating the steps 3 to 9, and completing the detection of all the flaw detection points (1);
step 11: and displaying all artificial defects by a computer in a C-type display mode.
2. The C-type display method for vertical wave flaw detection of hollow shaft according to claim 1, wherein: the hollow shaft (6) is a CRH type hollow shaft of the motor car.
3. The C-type display method for vertical wave flaw detection of hollow shaft according to claim 1, wherein: the hollow shaft (6) is a mechanical HXD1D hollow shaft.
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| CN201710636127.6A CN109324122B (en) | 2017-07-31 | 2017-07-31 | C-type display method for longitudinal wave vertical flaw detection method of hollow shaft |
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| CN201710636127.6A CN109324122B (en) | 2017-07-31 | 2017-07-31 | C-type display method for longitudinal wave vertical flaw detection method of hollow shaft |
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| US7132617B2 (en) * | 2002-02-20 | 2006-11-07 | Daimlerchrysler Corporation | Method and system for assessing quality of spot welds |
| CN100346160C (en) * | 2002-12-20 | 2007-10-31 | 鞍山美斯检测技术有限公司 | Method of real time tracking bottom echo for ultrasonic crank detection gate |
| US8285495B2 (en) * | 2009-04-29 | 2012-10-09 | Techno-Sciences, Inc | Corrosion inspection and monitoring system |
| JP5887964B2 (en) * | 2011-02-04 | 2016-03-16 | Ｊｆｅスチール株式会社 | Ultrasonic flaw detection method, ultrasonic flaw detection apparatus, and pipe material manufacturing method |
| US9222918B2 (en) * | 2013-02-15 | 2015-12-29 | Olympus Scientific Solutions Americas Inc. | Sizing of a defect using phased array system |
| CN103954687B (en) * | 2014-04-14 | 2016-08-24 | 大连天亿软件有限公司 | A kind of defect detection on ultrasonic basis, ultrasonic flaw detecting device and compressional wave shear wave climb ripple Integral ultrasonic angle probe |
| KR101693310B1 (en) * | 2015-11-20 | 2017-01-06 | 한국지질자원연구원 | Full-waveform inversion using plane wave method in anisotropic media |
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