CN103293223A - Characteristic guided wave based butt weld nondestructive testing system - Google Patents
Characteristic guided wave based butt weld nondestructive testing system Download PDFInfo
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- CN103293223A CN103293223A CN2013100664987A CN201310066498A CN103293223A CN 103293223 A CN103293223 A CN 103293223A CN 2013100664987 A CN2013100664987 A CN 2013100664987A CN 201310066498 A CN201310066498 A CN 201310066498A CN 103293223 A CN103293223 A CN 103293223A
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Abstract
Belonging to the field of nondestructive testing, the invention discloses a characteristic guided wave based butt weld nondestructive testing system. The system consists of a characteristic guided wave transceiver (1), a characteristic guided wave transducer (2) and a host computer (3). The characteristic guided wave transducer (2) is mounted at one end of a tested weld seam, and the characteristic guided wave transceiver (1) is in connection with the characteristic guided wave transducer (2) and the host computer (3). The characteristic guided wave transceiver (1) excites a characteristic guided wave signal of certain frequency. Excitation and receiving of guided waves in the weld seam is realized by the characteristic guided wave transducer (2). Then, the signal is sent to the host computer (3) through a communication module of the characteristic guided wave transceiver to undergo analysis and discrimination, thus finally realizing testing of weld defects. Only by arranging a sensor at one end of the weld seam, the system provided in the invention can realize online testing, and has the advantages of high testing efficiency and low cost.
Description
Technical field
The present invention relates to a kind of butt-weld nondestructive detection system based on the feature guided wave, belong to the Non-Destructive Testing field.
Background technology
Welding is the crucial interconnection technique of many large-scale components, defectives such as crackle, incomplete tusion, pore, undercut can appear in the commissure, by China's current law standard and common practice, the butt-weld that forms for the welding back in the plant equipment manufacture process generally need be carried out the ultrasonic or ray detection of some, to ensure product quality.
Traditional ultrasonic detecting technology is pointwise scanning method, not only wastes time and energy, and has certain blind area.Ray technology is widely used in the detection of pressure tight seam, but it is long to detect setup time, and is dangerous big, detects the cost height.In addition, more than two kinds of methods can only realize offline inspection, testing process comprises operations such as shut-down, turned letter, cleaning, rust cleaning (even tearing insulation open) and detection, exists deficiency such as to grow expense height, detection time.
Ultrasonic guided wave detecting is the development in recent years Non-Destructive Testing new method of getting up, can measure in the single pass and comprise all defect inner and surface in the whole thickness range, and can realize simultaneously that defect location and yardstick detect, obtain using widely in the defeated structure of a lot of large-scale length such as pipeline, rail etc.
Because propagating, ultrasound wave can form supersonic guide-wave in the constant long narrow structure of xsect, and when supersonic guide-wave is propagated along the fusion length direction, energy mainly concentrates in the weld seam, can form specific guided wave modal---weld seam feature guided wave, it can be applied to the Non-Destructive Testing of weld seam to utilize this characteristic.
Summary of the invention
The purpose of this invention is to provide a kind of butt-weld nondestructive detection system based on the feature guided wave, can realize the detection rapidly and efficiently of weld seam.System of the present invention is made up of feature guided wave transmitting-receiving instrument (5), feature wave guide energy converter (4), host computer (6); Feature wave guide energy converter (4) is installed in detected weld (2) one ends in the sheet material (1), and feature guided wave transmitting-receiving instrument (5) links to each other with feature wave guide energy converter (4), and feature guided wave transmitting-receiving instrument (5) links to each other with host computer (6); Feature guided wave transmitting-receiving instrument (5) is made up of signal generator (7), power amplifier (8), prime amplifier (9), filtering circuit (10), collection communication integrated circuit board (11); The sinusoidal signal through the high bass wave modulation by signal generator (7) output certain frequency, after power amplifier (8) amplification, send into the feature wave guide energy converter (4) that is installed in detected weld (2) one ends as source signal, feature wave guide energy converter (4) encourages weld seam feature guided wave in weld seam (2), run into defective (3) back and produce flaw echoes, received by feature wave guide energy converter (4), and the echoed signal of produce amplifying by prime amplifier (9), wave circuit (10) filtering after filtration, passing through collection communication integrated circuit board (11) again gathers with A/D and changes, send into processing and analysis that host computer (6) carries out echoed signal, finally realize the Non-Destructive Testing of flaw indication.
Feature wave guide energy converter (4) can adopt piezoelectric crystal, also can adopt PVDF.
Feature wave guide energy converter (4) can be the sensor of element excitation, also can be sensor array.
Feature wave guide energy converter (4) can be fixed on the weld seam with special feature guided wave probe holder.
Use the above-mentioned method that detects based on the butt-weld nondestructive detection system butt welded seam of feature guided wave, may further comprise the steps:
Step 1: utilize the finite element simulation method to determine the group velocity-frequency curve chart of single mode guided wave in the detected weld, select to detect frequency values f, obtain its corresponding velocity of wave v.
Step 2: feature wave guide energy converter (4) is installed on detected weld (2) one ends, the sinusoidal signal through the high bass wave modulation by signal generator (7) output certain frequency, after power amplifier (8) amplification, send into the feature wave guide energy converter (4) that is installed in detected weld (2) one ends as source signal, feature wave guide energy converter (4) encourages weld seam feature guided wave in weld seam (2), run into defective (3) back and produce flaw echoes, received by feature wave guide energy converter (4), and the echoed signal of produce amplifying by prime amplifier (9), wave circuit (10) filtering after filtration, passing through collection communication integrated circuit board (11) again gathers with A/D and changes, send into processing and analysis that host computer (6) carries out echoed signal, finally realize the Non-Destructive Testing of flaw indication.
Technique effect of the present invention
1) detect for weld defect, guided wave detects the disposable detection of energy in a big way and longer distance, and is convenient and swift.
2) defective of the disposable detection weld seam surfaces externally and internally of energy and weld seam inside, the detection efficiency height.
3) can realize online detection, can reduce the detection cost greatly, enhance productivity.
Description of drawings
Fig. 1 is system schematic of the present invention;
Fig. 2 is system chart of the present invention;
Fig. 3 is the guided wave group velocity dispersion curve (6mm steel plate weld seam) of 50-200KHz under the single mode;
Fig. 4 is echoed signal (6mm steel plate weld seam).
Sheet material (1), detected weld (2), weld defect (3), feature wave guide energy converter (4), feature guided wave transmitting-receiving instrument (5), host computer (6), signal generator (7), power amplifier (8), prime amplifier (9), filtering circuit (10), collection communication integrated circuit board (11).
Embodiment
In order to deepen the understanding of the present invention; below in conjunction with specific embodiments and the drawings; a kind of butt-weld nondestructive detection system based on the feature guided wave that the present invention is proposed is described in further detail, and illustrated embodiment only is used for explaining the present invention, does not constitute the restriction to protection domain of the present invention.
Embodiment 1:
As shown in Figure 1, tested steel (1) are the Q235-B carbon steel in this example, and plate size is 500mm * 1000mm * 6mm, and detected weld is long to be 500mm, reinforcement 2mm.In order checking zero defect to be arranged in the weld seam, to carry out Non-Destructive Testing with the following step:
1) by setting up the finite element model of jam welding carbon steel sheet in this example, simulation forms feature guided wave and communication process thereof by the supersonic guide-wave of sensor excitation in weld seam, obtain the group velocity-frequency curve chart of the single mode guided wave in pumping signal is the 50KHz-200KHz frequency range thus as shown in Figure 2.
2) from dispersion curve, choose 100KHz as detecting frequency, know its velocity of wave v=3550km/s, and at weld seam one end feature wave guide energy converter (4) is installed.
3) feature wave guide energy converter (4) is installed on weld seam (2) one ends to be checked, be the sinusoidal signal through high bass wave modulation of 100KHz by signal generator (7) output frequency, after power amplifier (8) amplification, send into the feature wave guide energy converter (4) that is installed in detected weld (2) one ends as source signal, feature wave guide energy converter (4) encourages weld seam feature guided wave in weld seam (2), run into defective (3) back and produce flaw echoes, received by feature wave guide energy converter (4), and the echoed signal of produce amplifying by prime amplifier (9), wave circuit (10) filtering after filtration, passing through collection communication integrated circuit board (11) again gathers with A/D and changes, send into processing and analysis that host computer (6) carries out echoed signal, finally realize the Non-Destructive Testing of weld defect (3).
Claims (4)
1. butt-weld nondestructive detection system based on the feature guided wave is characterized in that: this system is made up of feature guided wave transmitting-receiving instrument (5), feature wave guide energy converter (4), host computer (6); Feature wave guide energy converter (4) is installed in detected weld (2) one ends in the sheet material (1), and feature guided wave transmitting-receiving instrument (5) links to each other with feature wave guide energy converter (4), and feature guided wave transmitting-receiving instrument (5) links to each other with host computer (6); Feature guided wave transmitting-receiving instrument (5) is made up of signal generator (7), power amplifier (8), prime amplifier (9), filtering circuit (10), collection communication integrated circuit board (11); The sinusoidal signal through the high bass wave modulation by signal generator (7) output certain frequency, after power amplifier (8) amplification, send into the feature wave guide energy converter (4) that is installed in detected weld (2) one ends as source signal, feature wave guide energy converter (4) encourages weld seam feature guided wave in weld seam (2), run into defective (3) back and produce flaw echoes, received by feature wave guide energy converter (4), and the echoed signal of produce amplifying by prime amplifier (9), wave circuit (10) filtering after filtration, passing through collection communication integrated circuit board (11) again gathers with A/D and changes, send into processing and analysis that host computer (6) carries out echoed signal, finally realize the Non-Destructive Testing of flaw indication.
2. a kind of butt-weld nondestructive detection system based on the feature guided wave according to claim 1, it is characterized in that: feature wave guide energy converter (4) can adopt piezoelectric crystal, also can adopt PVDF.
3. a kind of butt-weld nondestructive detection system based on the feature guided wave according to claim 1, it is characterized in that: feature wave guide energy converter (4) can be the sensor of element excitation, also can be sensor array.
4. a kind of butt-weld nondestructive detection system based on the feature guided wave according to claim 1, it is characterized in that: feature wave guide energy converter (4) can be fixed on the weld seam with special feature guided wave probe holder.
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| CN106198383A (en) * | 2016-09-13 | 2016-12-07 | 上海海事大学 | The nondestructive detection system of a kind of small size component top layer microfissure and method |
| CN106198725A (en) * | 2016-06-22 | 2016-12-07 | 江苏大学 | The butt weld defect detecting system of a kind of feature based guided wave and detection method |
| CN108333255A (en) * | 2018-01-12 | 2018-07-27 | 中车青岛四方机车车辆股份有限公司 | A kind of laser welded seam automated ultrasonic detection device and detection method |
| CN109765301A (en) * | 2019-03-21 | 2019-05-17 | 江苏省特种设备安全监督检验研究院 | It is a kind of can obstacle detouring TOFD detection voussoir |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198725A (en) * | 2016-06-22 | 2016-12-07 | 江苏大学 | The butt weld defect detecting system of a kind of feature based guided wave and detection method |
| CN106198725B (en) * | 2016-06-22 | 2019-04-30 | 江苏大学 | A kind of butt weld defect detecting system and detection method based on feature guided wave |
| CN106198383A (en) * | 2016-09-13 | 2016-12-07 | 上海海事大学 | The nondestructive detection system of a kind of small size component top layer microfissure and method |
| CN108333255A (en) * | 2018-01-12 | 2018-07-27 | 中车青岛四方机车车辆股份有限公司 | A kind of laser welded seam automated ultrasonic detection device and detection method |
| CN109765301A (en) * | 2019-03-21 | 2019-05-17 | 江苏省特种设备安全监督检验研究院 | It is a kind of can obstacle detouring TOFD detection voussoir |
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Application publication date: 20130911 |