CN104122330A - Pipeline defect detection method and device based on electromagnetic ultrasonic longitudinal guided waves - Google Patents
Pipeline defect detection method and device based on electromagnetic ultrasonic longitudinal guided waves Download PDFInfo
- Publication number
- CN104122330A CN104122330A CN201410350794.4A CN201410350794A CN104122330A CN 104122330 A CN104122330 A CN 104122330A CN 201410350794 A CN201410350794 A CN 201410350794A CN 104122330 A CN104122330 A CN 104122330A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- ring
- defect
- magnet
- shaped magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a pipeline defect detection method based on electromagnetic ultrasonic longitudinal guided waves. The method comprises the following steps: arranging a plurality of annular magnets coaxial with a pipeline, so as to generate a radial static magnetic field on the surface of the pipeline; coaxially sleeving two sides of each annular magnet array with solenoid coils, so as to generate circumferential inducing vortex in the to-be-detected pipeline; and stimulating longitudinal-mode guided waves under the combined action of the circumferential inducing vortex and the radial static magnetic field, wherein when encountering a defect, the longitudinal-mode guided waves are reflected, and reflection echoes cause change of sensing voltage of a sensing coil when passing through a sensing coil, so as to judge that whether the defect exists in the pipeline or not. The invention further discloses a detection device and a sensor for detecting the pipeline by virtue of the device and the method. According to the method, the radial magnetic fields at the edges of the magnet arrays are adequately utilized, and the uniform radial magnetic field does not need to be generated, so that the complexity of the sensor is reduced; meanwhile, a single longitudinal-mode guided wave signal can be obtained, so that the defect signal analysis difficulty is reduced, and the detection process is rapid and efficient.
Description
Technical field
The present invention relates to Ultrasonic Nondestructive technical field, particularly a kind of defect inspection method and apparatus.
Background technology
Along with developing rapidly of the industries such as oil, chemical industry, the energy, industrial pipeline is being brought into play the effect becoming more and more important in commercial production operation.In the process of the production and operation, industrial pipeline Chang Yinwei high temperature, high pressure, wash away, the reason such as Korrosionsmedium, there is the failure modes such as burn into perforation or wall thickness reduction, cause revealing or explosion accident.For the actual effect of avoiding industrial pipeline works the mischief to commercial production, social safety, need to carry out regularly detecting and safeguarding to industrial pipeline.
Ultrasonic guided wave detection technology has advantages of that single-point-excitation can detect one end distance, is extremely suitable for pipe detection.In pipe detection, commonly use two kinds of axisymmetry mode guided waves: longitudinal mode guided wave and torsion mode guided wave.
At present, mainly contain piezoelectric sensor and electromagnetic ultrasonic transducer for the guided wave sensor of pipe detection.Than traditional piezoelectric transducer, electromagnetic ultrasonic transducer has advantages of that noncontact, pipe surface are high without grinding process, detection efficiency, is with a wide range of applications.
The principle of work of electromagnetic ultrasonic transducer has two kinds: Lorentz force and magnetostrictive effect.Magnetostriction type guided wave sensor can only be used for the pipe detection of ferrimagnet, and is subject to the impact of pipeline material Magnetostriction, and conversion efficiency is lower.Lorentz force formula electromagnetic ultrasonic guide wave sensor has advantages of that excitation receiving efficiency is high, signal to noise ratio (S/N ratio) is high, be subject to pipeline Effect of Materials little, is applicable to the detection of conductive material pipeline, as stainless-steel tube, carbon steel pipe, aluminum pipe etc., applied range.
In US7886604B2, disclose a kind of torsion mode electromagnetic ultrasonic transducer for detecting in heat exchanger tube, it is a kind of Lorentz force formula supersonic guide-wave sensor, can realize in heat exchanger tube and detecting.The people such as Ogi [Mode Conversion and Total Reflection of Torsional Waves for Pipe Inspection, Japanese Journal of Applied Physics, 2013,52:07HC14.] a kind of electromagnetic acoustic torsion mode guided wave sensor for aluminium pipe outside detection proposed, Wang Yu just wait [electromagnetic acoustic torsional wave detects the experimental study of steel tube defect. sensor and micro-system, 2014,02:23-25.] on ferromagnetic steel pipe, realize excitation and the reception of electromagnetic acoustic torsion mode guided wave.
But above-mentioned Lorentz force formula supersonic guide-wave sensor is excitation and reception torsion mode guided wave in pipeline, but torsion mode guided wave is not high to circumferential crack susceptibility, and velocity of propagation is not high, is not suitable for long distance and detects.
Than torsion mode guided wave, longitudinal mode guided wave is more responsive to circumferential crack defect, and velocity of propagation is faster in pipeline, is suitable for long distance and detects.A kind of electromagnetic acoustic longitudinal wave guide sensor is disclosed in US4471658B, the repel each other cylinder-shaped magnet of arranging and the ferrite being positioned in the middle of magnet of utilization placed and produced uniformly radially static magnetic field at ferrite, produces axial static magnetic field at magnet put area.All place solenoid coil at each ferrite center and magnetic blow out centre simultaneously, utilize the solenoid coil of multiple series connection to produce circumferential eddy currents, circumferential eddy currents and radially static magnetic field effect produce axial alternation Lorentz force, and circumferential eddy currents and axial static magnetic fields produce radially alternation Lorentz force.Utilize alternatively distributed axial Lorentz force and Lorentz force radially, go out longitudinal mode guided wave at small diameter pipeline internal motivation.
But this electromagnetic acoustic longitudinal wave guide sensor utilizes the Lorentz force of two kinds of directions to encourage longitudinal mode guided wave, required magnet and solenoid coil quantity are many on the one hand, sensor construction complexity; On the other hand, the Lorentz force acting in conjunction of two kinds of directions, can cause the supersonic guide-wave mode that motivates impure, produces the flaw echoes of multiple mode, finally strengthens the difficulty that flaw indication is analyzed.
Summary of the invention
For above problem, the object of the present invention is to provide a kind of defect inspection method and apparatus based on electromagnetic acoustic longitudinal wave guide, these apparatus and method utilize the radial offset magnetic field of magnet edges generation and the circumferential eddy currents of solenoid coil to produce axial alternation Lorentz force, in pipeline, excitation and reception longitudinal mode guided wave, realize the detection to defect of pipeline.These apparatus and method are owing to only needing a kind of Lorentz force effect of direction, and required magnet quantity is few, has simplified sensor construction, and sensor and pipeline enclosure, without physical contact, do not need pipe surface to process when detection, and detection efficiency is high, and signal to noise ratio (S/N ratio) is high.
According to one aspect of the present invention, a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide is provided, logical over excited longitudinal mode guided wave transmitting in pipeline realized the judgement to defect of pipeline, it is characterized in that, and the method comprises:
Along conduit axis direction to be detected, multiple ring-shaped magnets coaxially arranged with pipeline are set, and in described ring-shaped magnet, all magnet polarised directions are all parallel with axial direction, for pipeline is magnetized, thereby the region of the described ring-shaped magnet both sides on pipe surface produces radially static magnetic field;
At the coaxial sheathed solenoid coil in the both sides of each described loop wire magnet array, the center cross-sectional that makes solenoid coil overlaps with the end face of corresponding ring-shaped magnet, and each solenoid coil is composed in series sensing coil successively;
Sensing coil is passed to sinusoidal pulse current, make to produce in pipeline to be detected circumferential inductive loop, in circumferential inductive loop with radially under the acting in conjunction of static magnetic field, in pipeline, produce axial alternation Lorentz force, thereby motivate longitudinal mode guided wave;
This longitudinal mode guided wave is propagated and can reflect in the time running into defect along conduit axis direction, when the described sensing coil of reflection echo process, can cause that the induced voltage of sensing coil changes, by observing this induced voltage over time, can judge and in pipeline, whether have defect and realize location and the assessment to defect.
As improvement of the present invention, the polarised direction of described adjacent annular magnet is contrary, and two solenoid coils between two ring-shaped magnets are around on the contrary, and two solenoid coils that are positioned at same ring-shaped magnet both sides are around to identical.
As improvement of the present invention, the polarised direction of adjacent annular magnet is identical, adjacent described two solenoid coils around on the contrary.
As improvement of the present invention, the center distance of adjacent ring-shaped magnet equals longitudinal mode guide wavelength under excitation frequency.
As improvement of the present invention, the center distance of adjacent solenoid coil is equal to the half of longitudinal mode guide wavelength under excitation frequency.
As improvement of the present invention, described each solenoid coil internal diameter is less than or equal to ring-shaped magnet internal diameter, and is greater than outer diameter tube, for detecting defect from pipeline external.
As improvement of the present invention, described each solenoid coil external diameter is more than or equal to ring-shaped magnet external diameter, is less than internal diameter of the pipeline, for detecting defect from pipe interior.
According to another aspect of the present invention, a kind of defect inspection sensor based on electromagnetic acoustic longitudinal wave guide is provided, the longitudinal mode guided wave encouraging by this device transmitting in pipeline realized the judgement to defect of pipeline, it is characterized in that, this sensor comprises:
The coaxially arranged ring-shaped magnet of multiple and pipeline arranging along conduit axis direction to be detected, and in described ring-shaped magnet, all magnet polarised directions are all parallel with axial direction, for pipeline is magnetized, thereby the region of the described ring-shaped magnet both sides on pipe surface produces radially static magnetic field;
At the coaxial sheathed solenoid coil in the both sides of each described loop wire magnet array, and each solenoid coil is connected successively, the center cross-sectional of each solenoid coil overlaps with the end face of corresponding ring-shaped magnet, for can produce circumferential inductive loop at pipeline to be detected in the time that described each sensing coil is passed to sinusoidal pulse current;
In described circumferential inductive loop with radially under the acting in conjunction of static magnetic field, in pipeline to be detected, produce axial alternation Lorentz force, thereby motivate longitudinal mode guided wave, this longitudinal mode guided wave is propagated and can reflect in the time running into defect along conduit axis direction, when the described sensing coil of reflection echo process, can cause that the induced voltage of sensing coil changes, by observing this induced voltage over time, can judge and in pipeline, whether have defect and realize location and the assessment to defect.
According to another aspect of the present invention, a kind of electromagnetic acoustic longitudinal wave guide pick-up unit is provided, it is outer for detecting defect of pipeline that it is arranged on pipeline, it is characterized in that, this sensor comprises the hollow circular cylinder being combined to form by two magnetized module of semi-annular shape body and is arranged on the sensing module on this right cylinder, described pipeline to be detected is set on described hollow circular cylinder, wherein
Described magnetized module comprises that being mutually socketed by semicircular shell and inner casing the semicircular ring housing and the multiple axial array that form is arranged on the magnetising assembly in this semicircular ring housing, is provided with the supporting component for fixing and support this magnetising assembly between each magnetising assembly;
Described magnetising assembly has magnet, the polarised direction of each magnet is all parallel with pipeline axial direction, group of magnets on magnetising assembly corresponding to two magnetized module circularizes magnet, and its pipe surface region in corresponding magnet both sides produces radially static magnetic field, thereby pipeline is magnetized;
Described sensing module comprises electric wire connecting junction, plug and be fixed on side by side multiple coils coaxial with pipeline on described semicircular ring housing, wherein, the equal correspondence in each magnetising assembly both sides is provided with two described coils of arranging vertically, the center cross-sectional of each coil overlaps with the magnet axial end in corresponding magnetising assembly, described multiple coil is electrically connected the solenoid coil that forms series connection by electric wire connecting junction, for can produce circumferential inductive loop at pipeline to be detected in the time that described sensing coil is passed to sinusoidal pulse current, described plug is fixed on electric wire connecting junction, and be electrically connected with plug outlet,
In described circumferential inductive loop with radially under the acting in conjunction of static magnetic field, in pipeline to be detected, produce axial alternation Lorentz force, thereby motivate longitudinal mode guided wave, this longitudinal mode guided wave is propagated and can reflect in the time running into defect along conduit axis direction, when the described sensing coil of reflection echo process, can cause that the induced voltage of sensing coil changes, by observing this induced voltage over time, can judge and in pipeline, whether have defect and realize location and the assessment to defect.
As improvement of the present invention, between described two magnetized module, form opening-closing structure by hasp and gemel connection.
According to one side more of the present invention, a kind of electromagnetic acoustic longitudinal wave guide pick-up unit is provided, it is arranged in pipeline for detecting defect of pipeline, it is characterized in that, this sensor comprises coaxial left positioning body, stimulus sensor, middle positioning body, receiving sensor and the right positioning body of serial connection successively, wherein
Described stimulus sensor and receiving sensor are respectively used to excitation and produce longitudinal mode guided wave and receive through the reflected signal of this longitudinal mode guided wave in pipeline, and two sensors structure is identical, includes:
By cylindrical shell, be sleeved in this cylindrical shell and spaced apart multiple ring-shaped magnet, be arranged between each ring-shaped magnet for supporting multiple supporting mechanisms of ring-shaped magnet, and be wrapped in the annular groove of cylindrical shell outer peripheral face for excitation or receive multiple solenoid coils of longitudinal mode guided wave, wherein, each ring-shaped magnet polarised direction is all parallel with axial direction, thereby the region of the described ring-shaped magnet both sides on pipe surface produces radially static magnetic field pipeline is magnetized, each ring-shaped magnet both sides correspondence arranges the described solenoid coil of two coaxial packages, and each solenoid coil formation sensing coil of connecting successively, the center cross-sectional of each solenoid coil overlaps with the end face of corresponding ring-shaped magnet,
Pass to the circumferential inductive loop of sinusoidal pulse current generation and the acting in conjunction of the radially static magnetic field that each ring-shaped magnet produces by each sensing coil in described stimulus sensor, in pipeline to be detected, produce axial alternation Lorentz force, thereby motivate longitudinal mode guided wave, it is converted into induced voltage signal by the sensing coil in described receiving sensor after propagation reflections in described pipeline, by observing this induced voltage over time, can judge and in pipeline, whether have defect and realize location and the assessment to defect.
As improvement of the present invention, also comprise cover plate, excitation plug, receive plug, casing, end fastening body, end relocation mechanism, afterbody relocation mechanism and afterbody fastening body, wherein said excitation plug and reception plug are fixed on cover plate, be electrically connected with the sensing coil outlet of stimulus sensor and receiving sensor respectively, described cover plate and casing, casing and end fastening body are connected by screw, described end relocation mechanism is installed on the fastening body of end, end fastening body and left positioning body are threaded connection, described afterbody relocation mechanism is installed on afterbody fastening body, described afterbody fastening body and right positioning body are threaded connection.
In the present invention, treat detection pipeline by N ring-shaped magnet and magnetize.Ring-shaped magnet axis overlaps with conduit axis.In ring-shaped magnet, the polarised direction of all magnet is parallel with axis direction.The center distance of adjacent annular magnet equals longitudinal mode guide wavelength under excitation frequency, and the width of an independent ring-shaped magnet equals the half of wavelength.In the time that under excitation frequency, longitudinal wave guide wavelength is less than or equal to 10mm, the polarised direction of adjacent annular magnet is contrary; In the time that longitudinal wave guide wavelength is greater than 10mm, the polarised direction of adjacent annular magnet is identical.
In the present invention, at a solenoid coil of the each layout in the both sides of each adjacent annular magnet, the center cross-sectional of each solenoid coil all overlaps in an end face of corresponding ring-shaped magnet, arranges that altogether 2N solenoid coil is composed in series sensing coil.Adjacent two solenoid coil center distance equal the half of longitudinal mode guide wavelength under excitation frequency.
In the present invention, sensing coil is passed to sinusoidal pulse current, in steel pipe, motivate longitudinal mode guided wave.Guided wave is propagated along conduit axis direction, when the defect by defect reflection.When reflection echo process sensing coil, the induced voltage of sensing coil is changed.By observing sensing coil induced voltage over time, whether judge in pipeline defectiveness, and defect is positioned.
In the present invention, described detection method is for excitation wavelength while being greater than the longitudinal wave guide of 20mm, and the polarity of adjacent two ring-shaped magnets is identical, adjacent two solenoid coils around to identical.
In the present invention, when described detection method is less than or equal to the longitudinal wave guide of 20mm for excitation wavelength, the polarity of adjacent two ring-shaped magnets is contrary, and two solenoid coils between two ring-shaped magnets are around on the contrary, and two solenoid coils that are positioned at same ring-shaped magnet both sides are around to identical.
In the present invention, the system detecting for the defect inspection device of the electromagnetic acoustic longitudinal wave guide by above-mentioned detection method comprises signal generator, power amplifier, detecting sensor, signal preprocessor, A/D converter and computing machine.Wherein signal generator, for generation of sinusoidal pulse current, is input to detecting sensor after power amplifier amplifies, and motivates longitudinal mode guided wave in pipeline.Guided wave is converted into electric signal pass through detecting sensor in communication process time, and this electric signal, after signal preprocessor and A/D converter, enters the acquisition module of computing machine, the testing process of complete twin conduit.
In the present invention, the first detecting sensor structure: formed by the same stimulus sensor of structure and receiving sensor.Stimulus sensor includes with receiving sensor: two magnetized module, sensing module, hinge and hasps that position symmetrical structure is identical.
In the present invention, described magnetized module comprises: shell, a N magnetising assembly, a N+1 supporting component and inner casing.Magnetising assembly, supporting component and inner casing are all fixed on shell.Magnetising assembly and supporting component are alternately between shell and inner casing.N is positive integer.
In the present invention, described magnetising assembly is made up of magnet housing, magnet lid, some magnet.Magnet housing is semicircle annular, and inside has the groove for magnet is installed, and between magnet lid and magnet housing, is connected by screw.
In the present invention, described two magnetized module are connected with hasp by hinge and form open-and-close mechanism.In the time that described two magnetized module are closed, N the ring-shaped magnet of magnet composition in 2N magnetising assembly.
In the present invention, described sensing module comprises: 2N flexible winding displacement, electric wire connecting junction and plug.Flexible winding displacement around and be fixed on the inner casing of two magnetized module, 2N flexible winding displacement is electrically connected with electric wire connecting junction, forms 2N solenoid coil of connecting.
In the present invention, the second detecting sensor structure: comprise cover plate, excitation plug, reception plug, casing, end fastening body, end relocation mechanism, left positioning body, stimulus sensor, middle positioning body, receiving sensor, right positioning body, afterbody fastening body and afterbody relocation mechanism composition.
In the present invention, described stimulus sensor is identical with receiving sensor structure, by housing, a N+1 supporting mechanism, a N magnet, a 2N solenoid coil composition.Supporting mechanism and magnet are alternately and be fixed on enclosure interior.On housing, have 2N annular groove, coil winding is in the annular groove of housing.2N solenoid coil is composed in series sensing coil, to encourage or to receive longitudinal mode guided wave.
In the present invention, described excitation plug and reception plug are fixed on cover plate, respectively at the sensing coil outlet electrical connection of stimulus sensor and receiving sensor.Cover plate and casing, casing and end fastening body are connected by screw.End relocation mechanism is installed on the fastening body of end, and end fastening body and left positioning body are threaded connection.Stimulus sensor is fixed between left positioning body and middle positioning body by holding screw, and receiving sensor is fixed between middle positioning body and right positioning body by holding screw.Afterbody relocation mechanism is installed on afterbody fastening body, and afterbody fastening body and right positioning body are threaded connection.
In the present invention, ring-shaped magnet can be that ringwise single magnet or multiple magnet surround the ring-shaped magnet array that annular forms.
In general, the above technical scheme of conceiving by the present invention compared with prior art, has following beneficial effect:
Defect of pipeline electromagnetic acoustic longitudinal wave guide detection method of the present invention and device, be arranged in the magnet array that pipeline axial is arranged in parallel, and the conduit region corresponding at magnet array edge produces radial offset magnetic field.Arrange that solenoid coil, in magnet array both sides, produces circumferential eddy currents at radial offset field region.Produce axial alternation Lorentz force by radial offset magnetic field and circumferential eddy currents, excitation and reception longitudinal mode guided wave in pipeline.The method takes full advantage of magnet array edge radial magnetic field on the one hand, and no longer need to repel each other magnet and ferrite effect produce even radial magnetic field, have reduced the quantity of magnet in sensor, thereby have reduced the complexity of sensor; Encourage on the other hand in longitudinal wave guide process and only need axial alternation Lorentz force, no longer need radially Lorentz force, can obtain single longitudinal mode echoed signal, reduce flaw indication and analyze difficulty, testing process rapidly and efficiently.
Brief description of the drawings
Fig. 1 is according to the principle schematic of the detection method of the embodiment of the present invention;
Fig. 2 is for the outer structure of the detecting device figure detecting of pipeline according to the present invention
Fig. 3 is for the outer electromagnetic acoustic longitudinal wave guide sensor construction figure detecting of pipeline according to the present invention.
Fig. 4 is the structural drawing of magnetising assembly in Fig. 3 sensor
Fig. 5 is the structure of the detecting device figure for pipeline detection according to the present invention
Fig. 6 is the electromagnetic acoustic longitudinal wave guide sensor construction figure for pipeline detection according to the present invention
Fig. 7 is the partial sectional view at receiving sensor position in Fig. 6 sensor
Fig. 8 is external diameter 25mm used in specific embodiment, the pipeline of the internal diameter 20mm schematic diagram that changes
Fig. 9 is the oscillogram that uses pick-up unit gained detection signal shown in Fig. 5.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition,, in each embodiment of described the present invention, involved technical characterictic just can combine mutually as long as do not form each other conflict.
The principle schematic of the detection method of the embodiment of the present invention as shown in Figure 1.Arrange that along conduit axis direction to be detected N ring-shaped magnet 1 magnetizes pipeline.In ring-shaped magnet 1, all magnet polarised directions are all parallel with axial direction, and the polarised direction of adjacent annular magnet 1 is contrary.Deposit at this cloth, ring-shaped magnet 1 produces radially static magnetic field in the region of pipe surface magnet array both sides.Solenoid coil 2 is arranged in the both sides of adjacent magnets array 1, and the center cross-sectional of solenoid coil 2 overlaps with the end face of adjacent magnets array 1.2N solenoid coil 2 is cascaded.Adjacent solenoid coil 2 around on the contrary.The center distance of adjacent annular magnet 1 equals longitudinal mode guide wavelength under excitation frequency, and the center distance of adjacent solenoid coil 2 is equal to the half of longitudinal mode guide wavelength under excitation frequency.
When sensing coil is passed to sinusoidal pulse current, in pipeline to be detected, produce circumferential inductive loop.Based on Lorentz force effect, in circumferential inductive loop with radially under the acting in conjunction of static magnetic field, in pipeline by alternation Lorentz force axial generation, thereby motivate longitudinal mode guided wave.Guided wave is propagated along conduit axis direction, while running into defect, can reflect.Reflection echo can cause that the induced voltage of sensing coil changes when the sensing coil, observes this induced voltage over time, can judge in pipeline, whether there is defect.Analyze respectively time and amplitude that induced voltage changes, can position defect, defect size is assessed.
This detection method can be used for pipeline and detects outward, also can be used for pipeline detection.While being used for detecting defect from pipeline external, solenoid coil 2 internal diameters are less than or equal to ring-shaped magnet 1 internal diameter, are greater than outer diameter tube.While being used for detecting defect from pipe interior, solenoid coil 2 external diameters are more than or equal to ring-shaped magnet 1 external diameter, are less than internal diameter of the pipeline.
Be used for the electromagnetic acoustic longitudinal wave guide defect inspection device of outer detection as shown in Figure 2.This device comprises signal generator 8, power amplifier 7, detecting sensor 4, signal preprocessor 11, A/D converter 10 and computing machine 9.Wherein detecting sensor 4 is made up of the same stimulus sensor 5 of structure and receiving sensor 6, and both are installed in pipeline 3 outsides.Signal generator 8, for generation of sinusoidal pulse current, is input to stimulus sensor 5 after power amplifier 7 amplifies, and motivates longitudinal mode guided wave in pipeline.Guided wave is converted into electric signal pass through receiving sensor 6 in communication process time, and this electric signal, after signal preprocessor 11 and A/D converter 10, enters the acquisition module of computing machine 9, the testing process of complete twin conduit.
Fig. 3 is for the outer electromagnetic acoustic longitudinal wave guide sensor construction figure detecting of pipeline according to of the present invention.Comprise upper magnetized module 12, lower magnetized module 13, sensing module 15, hasp 14 and hinge 23 according to of the present invention for the outer electromagnetic acoustic longitudinal wave guide sensor detecting of pipeline.Upper and lower magnetized module 12,13 structures are identical and position is symmetrical, form by shell 19, supporting component 20, magnetising assembly 21 and inner casing 22.Hasp 14 and hinge 23 are fixed on shell 19.Between upper magnetized module 12 and lower magnetized module 13, be connected to form opening-closing structure by hasp 14 and hinge 23.N+1 supporting component 20 and N magnetising assembly 21 alternately, and are fixed on shell 19.Between inner casing 22 and shell 19, be connected by screw.Sensing module 15 is made up of coil 16, electric wire connecting junction 17 and plug 18.2N coil 16 is fixed on the groove of inner casing 22 side by side, and is electrically connected with electric wire connecting junction 17 and forms the solenoid coil that 2N connects.Plug 18 is fixed on electric wire connecting junction 17 by screw thread, and is electrically connected with plug 18 outlets.
Fig. 4 is the sensing module structural drawing of sensor in Fig. 3.As shown in Figure 4, magnetising assembly 21 comprises magnet housing 24, several magnet 25 and magnet lid 26.In magnet housing 24, be processed with groove so that magnet 25 to be installed, magnet lid 26 is fixed by screws on magnet housing 24.
Be used for the electromagnetic acoustic longitudinal wave guide defect inspection device of interior detection as shown in Figure 5, this device comprises signal generator 8, power amplifier 7, detecting sensor 27, signal preprocessor 11, A/D converter 10 and computing machine 9.Detecting sensor 27 is arranged on pipeline 28 ends.Signal generator 8, for generation of sinusoidal pulse current, is input to detecting sensor 27 after power amplifier 7 amplifies, and motivates longitudinal mode guided wave in pipeline.Guided wave is converted into electric signal pass through detecting sensor 27 in communication process time, and this electric signal, after signal preprocessor 11 and A/D converter 10, enters the acquisition module of computing machine 9, the testing process of complete twin conduit.
Fig. 6 is according to the electromagnetic acoustic longitudinal wave guide sensor construction figure for pipeline detection of the present invention.Detecting sensor comprises: comprise cover plate 29, excitation plug 30, receive plug 31, casing 32, end fastening body 33, end relocation mechanism 34, left positioning body 35, stimulus sensor 36, middle positioning body 37, receiving sensor 38, right positioning body 39, afterbody relocation mechanism 40 and afterbody fastening body 41.
Fig. 7 is the partial sectional view of receiving sensor.Stimulus sensor 36 is identical with receiving sensor 38 structures, forms by housing 42, a N+1 supporting mechanism 43, a N magnet 44, a 2N solenoid coil 45.Supporting mechanism 43 and magnet 44 are alternately and be fixed on housing 42 inside.On housing 42, have 2N annular groove, coil 45 is wrapped in the annular groove of housing.2N solenoid coil 45 is composed in series sensing coil, is used for encouraging or reception longitudinal mode guided wave.
Excitation plug 30 and reception plug 31 are fixed on cover plate 29, respectively at the sensing coil outlet electrical connection of stimulus sensor 36 and receiving sensor 38.Cover plate 29 is connected by screw with end fastening body 33 with casing 32, casing 32.End relocation mechanism 34 is installed on end fastening body 33, and end fastening body 33 is threaded connection with left positioning body 35.Stimulus sensor 36 is fixed between left positioning body 35 and middle positioning body 37 by holding screw, and receiving sensor 38 is fixed between middle positioning body 37 and right positioning body 39 by holding screw.Afterbody relocation mechanism 41 is installed on afterbody fastening body 40.Afterbody fastening body 41 is threaded connection 39 with right positioning body.
Fig. 8 is an external diameter 25mm, the pipeline standard specimen schematic diagram of internal diameter 20mm, and pipe range is 2.8m, there is a translot defect apart from the position of left part 1.4m, has a defective hole apart from the position of left part 2m.The long 12.5mm of translot, wide 1mm, dark 0.5mm, equivalent cross-sectional area loss is 3.7%.Through-hole diameter is Φ 5, and its equivalent cross-sectional area loss is 7.5%.
Fig. 9 uses the electromagnetic acoustic longitudinal wave guide defect inspection device for interior detection shown in Fig. 5, detects the oscillogram of gained signal on standard specimen pipe.In Fig. 9, the echo of translot defect represents with S1, and the echo of defective hole represents with S2, and the second trip echo of translot flaw echo after the reflection of piping left part represents with S3.
Can find out from experimental result, this electromagnetic acoustic longitudinal wave guide defect inspection device accuracy of detection is good, installation of sensors fast and easy, and testing process is convenient and swift.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included in protection scope of the present invention.
Claims (13)
1. the defect inspection method based on electromagnetic acoustic longitudinal wave guide, logical over excited longitudinal mode guided wave transmitting in pipeline realized the judgement to defect of pipeline, it is characterized in that, and the method comprises:
Along conduit axis direction to be detected, multiple and the coaxial sheathed ring-shaped magnet of pipeline are set, and in described ring-shaped magnet (1), all magnet polarised directions are all parallel with axial direction, for pipeline is magnetized, thereby the region of the described ring-shaped magnet both sides on pipe surface produces radially static magnetic field;
At the coaxial sheathed solenoid coils in both sides (2) of each described ring-shaped magnet (1), and the center cross-sectional that makes described solenoid coil (2) overlaps with the end face of corresponding ring-shaped magnet (1), and each solenoid coil (2) is composed in series sensing coil successively;
This sensing coil is passed to sinusoidal pulse current, make to produce in pipeline to be detected circumferential inductive loop, in described circumferential inductive loop with radially under the acting in conjunction of static magnetic field, in pipeline, produce axial alternation Lorentz force, thereby motivate longitudinal mode guided wave;
This longitudinal mode guided wave is propagated and can reflect in the time running into defect along conduit axis direction, when the described sensing coil of reflection echo process, can cause that the induced voltage of sensing coil changes, by observing this induced voltage over time, can judge and in pipeline, whether have defect and realize location and the assessment to defect.
2. a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide according to claim 1, wherein, the polarised direction of adjacent two ring-shaped magnets (1) is contrary.
3. a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide according to claim 2, wherein, be positioned at two solenoid coils (2) between two ring-shaped magnets (1) around on the contrary, two solenoid coils (2) that are positioned at same ring-shaped magnet (1) both sides are around to identical.
4. a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide according to claim 1, wherein, the polarised direction of adjacent two ring-shaped magnets (1) is identical.
5. a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide according to claim 4, wherein, adjacent two solenoid coils (2) around to identical.
6. according to a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide described in any one in claim 1-5, wherein, the center distance of adjacent two ring-shaped magnets (1) equals longitudinal mode guide wavelength under excitation frequency.
7. according to a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide described in any one in claim 1-6, wherein, the center distance of adjacent two solenoid coils (2) equals the axial width of ring-shaped magnet (1) and the half for longitudinal mode guide wavelength under excitation frequency.
8. according to a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide described in any one in claim 1-7, wherein, described each solenoid coil (2) internal diameter is less than ring-shaped magnet (1) internal diameter, and be greater than outer diameter tube, for detecting defect from pipeline external.
9. according to a kind of defect inspection method based on electromagnetic acoustic longitudinal wave guide described in any one in claim 1-7, wherein, described each solenoid coil (2) external diameter is greater than ring-shaped magnet (1) external diameter, is less than internal diameter of the pipeline, for detecting defect from pipe interior.
10. the defect inspection sensor based on electromagnetic acoustic longitudinal wave guide, the reflected signal of the longitudinal mode guided wave encouraging by this device in pipeline realized the judgement to defect of pipeline, it is characterized in that, and this sensor comprises:
Multiple and the coaxial sheathed ring-shaped magnet of pipeline (1) arranging along conduit axis direction to be detected, and in described ring-shaped magnet (1), all magnet polarised directions are all parallel with axial direction, for pipeline is magnetized, thereby the region of described ring-shaped magnet (1) both sides on pipe surface produces radially static magnetic field;
The coaxial sheathed solenoid coil (2) in both sides of each described loop wire magnet array (1), and each solenoid coil (2) is connected successively and is formed sensing coil, the center cross-sectional of each solenoid coil (2) overlaps with the end face of corresponding ring-shaped magnet (1), for can produce circumferential inductive loop at pipeline to be detected in the time that described sensing coil is passed to sinusoidal pulse current;
In described circumferential inductive loop with radially under the acting in conjunction of static magnetic field, in pipeline to be detected, produce axial alternation Lorentz force, thereby motivate longitudinal mode guided wave, this longitudinal mode guided wave is propagated and can reflect in the time running into defect along conduit axis direction, when the described sensing coil of reflection echo process, can cause that the induced voltage of sensing coil changes, by observing this induced voltage over time, can judge and in pipeline, whether have defect and realize location and the assessment to defect.
11. 1 kinds of electromagnetic acoustic longitudinal wave guide pick-up units, it is outer for detecting defect of pipeline that it is arranged on pipeline, it is characterized in that, this pick-up unit comprises the hollow circular cylinder being combined to form by two magnetized module of semi-annular shape (12,13) and is arranged on the sensing module (15) on this right cylinder, pipeline to be detected is set on this hollow circular cylinder, wherein
Described magnetized module (12,13) comprises that being mutually socketed by semicircular shell (19) and inner casing (22) the semicircular ring housing and the multiple axial array that form is arranged on the magnetising assembly (21) in this semicircular ring housing, is provided with the supporting component (20) for fixing and support this magnetising assembly (21) between each magnetising assembly (21);
Described magnetising assembly (21) has magnet (25), the polarised direction of each magnet (25) is all parallel with pipeline axial direction, magnet (25) composition ring-shaped magnet on magnetising assembly (21) corresponding to two magnetized module, its pipe surface region in corresponding magnet (25) both sides produces radially static magnetic field, thereby pipeline is magnetized;
Described sensing module (15) comprises electric wire connecting junction (17), plug (18) and be fixed on side by side multiple coils (16) coaxial with pipeline on described semicircular ring housing, wherein, the equal correspondence in each magnetising assembly (21) both sides is provided with two described coils (16) of arranging vertically, the center cross-sectional of each coil (16) overlaps with magnet (25) axial end in corresponding magnetising assembly (21), described multiple coil consists of the solenoid coil of series connection electric wire connecting junction (17) electrical connection, for can produce circumferential inductive loop at pipeline to be detected in the time that described sensing coil is passed to sinusoidal pulse current, described plug (18) is fixed on electric wire connecting junction (17), and be electrically connected with plug (18) outlet,
In described circumferential inductive loop with radially under the acting in conjunction of static magnetic field, in pipeline to be detected, produce axial alternation Lorentz force, thereby motivate longitudinal mode guided wave, this longitudinal mode guided wave is propagated and can reflect in the time running into defect along conduit axis direction, when the described sensing coil of reflection echo process, can cause that the induced voltage of sensing coil changes, by observing this induced voltage over time, can judge and in pipeline, whether have defect and realize location and the assessment to defect.
12. 1 kinds of electromagnetic acoustic longitudinal wave guide pick-up units, it is arranged in pipeline for detecting defect of pipeline, it is characterized in that, this pick-up unit comprises coaxial left positioning body (35), stimulus sensor (36), middle positioning body (37), receiving sensor (38) and the right positioning body (39) of serial connection successively, wherein, described stimulus sensor (36) and receiving sensor (38) are respectively used to excitation and produce longitudinal mode guided wave and receive through the reflected signal of this longitudinal mode guided wave in pipeline, two sensors structure is identical, includes:
By cylindrical shell (42), be sleeved in this cylindrical shell (42) and spaced apart multiple ring-shaped magnet (44), be arranged between each ring-shaped magnet (44) for supporting multiple supporting mechanisms (43) of ring-shaped magnet (44), and be wrapped in the annular groove of cylindrical shell (42) outer peripheral face for excitation or receive multiple solenoid coils (45) of longitudinal mode guided wave, wherein, each ring-shaped magnet (44) polarised direction is all parallel with axial direction, thereby the region of described ring-shaped magnet (44) both sides on pipe surface produces radially static magnetic field pipeline is magnetized, each ring-shaped magnet (44) both sides correspondence arranges the described solenoid coil (45) of two coaxial packages, and each solenoid coil (45) is connected successively and is formed sensing coil, the center cross-sectional of each solenoid coil (45) overlaps with the end face of corresponding ring-shaped magnet (44),
Pass to the circumferential inductive loop of sinusoidal pulse current generation and the acting in conjunction of the radially static magnetic field that each ring-shaped magnet (44) produces by each sensing coil in described stimulus sensor (36), in pipeline to be detected, produce axial alternation Lorentz force, thereby motivate longitudinal mode guided wave, it is converted into induced voltage signal by the sensing coil (44) in described receiving sensor (38) after propagation reflections in described pipeline, by observing this induced voltage over time, can judge and in pipeline, whether have defect and realize location and the assessment to defect.
13. 1 kinds comprise the detection system of the detecting sensor described in claim 11 or 12, it is characterized in that, this device also comprises signal generator (8), power amplifier (7), signal preprocessor (11), A/D converter (10) and processor (9), wherein, described power amplifier (7) is electrically connected with excitation plug (30), receiving plug (31) is electrically connected with described signal preprocessor (11), described processor (9) control signal generator (8) produces sinusoidal pulse current, after amplifying, power amplifier (7) is input to the pick-up unit described in claim 11 or 12, it motivates longitudinal mode guided wave in pipeline, after propagating and reflecting, produce corresponding electric signal in pipeline, after described signal preprocessor (11) and A/D converter (10), inputting described processor (9) processes and can obtain defect inspection result by analysis, the testing process of complete twin conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350794.4A CN104122330B (en) | 2014-07-22 | 2014-07-22 | Defect inspection method and apparatus based on electromagnetic acoustic longitudinal wave guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350794.4A CN104122330B (en) | 2014-07-22 | 2014-07-22 | Defect inspection method and apparatus based on electromagnetic acoustic longitudinal wave guide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104122330A true CN104122330A (en) | 2014-10-29 |
| CN104122330B CN104122330B (en) | 2016-08-17 |
Family
ID=51767823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410350794.4A Expired - Fee Related CN104122330B (en) | 2014-07-22 | 2014-07-22 | Defect inspection method and apparatus based on electromagnetic acoustic longitudinal wave guide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104122330B (en) |
Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445362A (en) * | 2015-11-13 | 2016-03-30 | 华中科技大学 | Method and device for detecting magnetostrictive guided wave based on open magnetic circuit |
| CN105675717A (en) * | 2016-02-03 | 2016-06-15 | 天津亿利科能源科技发展股份有限公司 | Nondestructive testing structure for submarine pipe in tidal range zone, processing method and testing method |
| CN105973995A (en) * | 2016-06-13 | 2016-09-28 | 华中科技大学 | Electromagnetic ultrasonic probe suitable for detecting round-section steel products and plates |
| CN107084692A (en) * | 2017-06-30 | 2017-08-22 | 沈阳工业大学 | Electromagnetic acoustic shear wave thickness measuring transducer |
| CN107102055A (en) * | 2017-04-25 | 2017-08-29 | 武汉中科创新技术股份有限公司 | Electromagnetic ultrasonic guide wave probe detector |
| CN107127133A (en) * | 2017-06-30 | 2017-09-05 | 沈阳工业大学 | A kind of transverse mode electromagnetic acoustic pipeline detection spiral wave guide energy converter |
| CN107422043A (en) * | 2017-06-30 | 2017-12-01 | 沈阳工业大学 | Electromagnetic acoustic spiral wave guide energy converter is detected outside a kind of p-wave model pipeline |
| CN107422027A (en) * | 2017-09-05 | 2017-12-01 | 北京工业大学 | Torsion mode guided wave magneto strictive sensor based on dual ring permanent volume array |
| CN107607629A (en) * | 2017-09-07 | 2018-01-19 | 安徽科技学院 | Heterogeneous material pipeline section product loss detection method based on supersonic guide-wave technology |
| CN107607623A (en) * | 2017-09-21 | 2018-01-19 | 北京中盈盘古智能技术有限公司 | Squirrel-cage magnetostriction longitudinal mode Guided waves sensor |
| CN107941901A (en) * | 2018-01-19 | 2018-04-20 | 沈阳工业大学 | A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step |
| CN107941855A (en) * | 2017-11-22 | 2018-04-20 | 四川大学 | A kind of pipe end thermal imaging detection device based on permanent magnet rotary heating |
| CN108225228A (en) * | 2018-04-13 | 2018-06-29 | 沈阳工业大学 | Detection electromagnetic ultrasonic thickness measuring transducer architecture in circular pipe |
| CN108508085A (en) * | 2018-02-09 | 2018-09-07 | 清华大学 | A kind of torsion mode magneto strictive sensor, pipe detection system and method |
| CN108508089A (en) * | 2018-04-13 | 2018-09-07 | 沈阳工业大学 | Electromagnetic supersonic flaw detecting transducer architecture is detected outside circular pipe |
| CN108535365A (en) * | 2018-04-13 | 2018-09-14 | 沈阳工业大学 | Electromagnetic supersonic flaw detecting transducer architecture is detected outside square pipe |
| CN108534721A (en) * | 2018-04-13 | 2018-09-14 | 沈阳工业大学 | Electromagnetic ultrasonic thickness measuring transducer architecture is detected outside square pipe |
| CN108562642A (en) * | 2018-02-09 | 2018-09-21 | 清华大学 | Electromagnet transduction device, the pipe detection system and method for longitudinal mode supersonic guide-wave |
| CN108680650A (en) * | 2018-04-13 | 2018-10-19 | 沈阳工业大学 | Electromagnetic supersonic flaw detecting transducer architecture is detected in square pipe |
| CN108692683A (en) * | 2018-04-13 | 2018-10-23 | 沈阳工业大学 | Electromagnetic ultrasonic thickness measuring transducer architecture is detected outside circular pipe |
| CN108760896A (en) * | 2018-04-13 | 2018-11-06 | 沈阳工业大学 | Electromagnetic supersonic flaw detecting transducer architecture is detected in circular pipe |
| CN108776178A (en) * | 2018-05-14 | 2018-11-09 | 南京航空航天大学 | A kind of electromagnet ultrasonic changer and its working method for exciting pipeline torsion guided wave |
| CN108802185A (en) * | 2018-06-26 | 2018-11-13 | 哈尔滨工业大学 | Metal material defects detection sensor based on impulse eddy current and electromagnetic acoustic |
| CN109187749A (en) * | 2018-09-27 | 2019-01-11 | 华中科技大学 | A kind of mode of flexural vibration guided wave sensor |
| CN109374756A (en) * | 2018-11-30 | 2019-02-22 | 上海市特种设备监督检验技术研究院 | A kind of dedicated super magnetic conductor excitation patch and detection method for heat exchanger tube detection |
| CN110375687A (en) * | 2018-04-13 | 2019-10-25 | 沈阳工业大学 | Electromagnetic ultrasonic thickness measuring transducer architecture is detected in square pipe |
| CN110514743A (en) * | 2019-09-03 | 2019-11-29 | 厦门大学 | A kind of electromagnetic supersonic flaw detecting method and device of pipeline defect detection |
| CN110568060A (en) * | 2019-10-15 | 2019-12-13 | 厦门大学 | Coil self-excited ferromagnetic pipeline electromagnetic ultrasonic transducer, excitation device and receiving device |
| CN110988110A (en) * | 2019-12-10 | 2020-04-10 | 华中科技大学 | Magnetostrictive guided wave transducer |
| CN111118329A (en) * | 2020-01-19 | 2020-05-08 | 江苏大学 | Preparation method and device of high-toughness high-neutron absorption aluminum-based composite material |
| CN111505121A (en) * | 2020-05-22 | 2020-08-07 | 西安交通大学 | Interpolation type full-coil structure electromagnetic ultrasonic longitudinal guided wave probe and nondestructive testing method |
| CN111505119A (en) * | 2020-05-08 | 2020-08-07 | 清华大学 | Flexible ultrasonic fatigue damage detection device and manufacturing method thereof |
| CN111656142A (en) * | 2018-01-30 | 2020-09-11 | 梅科斯股份公司 | Non-contact radial position sensor with improved response to target defects |
| CN112114028A (en) * | 2020-08-26 | 2020-12-22 | 厦门大学 | Bolt hole edge crack monitoring method based on multi-field coupling sensor |
| CN112414337A (en) * | 2020-12-01 | 2021-02-26 | 湖北工业大学 | Externally-penetrating annular array electromagnetic ultrasonic thickness measuring probe |
| CN112945476A (en) * | 2021-02-09 | 2021-06-11 | 马丽娟 | Small pressure container trace gas leakage emergency ultrasonic detection system and method |
| CN116242239A (en) * | 2022-12-09 | 2023-06-09 | 江汉大学 | Method and device for detecting thickness of nodular cast iron pipe |
| CN116735700A (en) * | 2023-08-08 | 2023-09-12 | 国机传感科技有限公司 | Pipeline defect stress composite detection sensor and detection method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11326286A (en) * | 1998-05-08 | 1999-11-26 | Shin Nippon Hihakai Kensa Kk | Electromagnetic ultrasonic flaw detection apparatus and method using magnetic strain effect |
| DE10241831B3 (en) * | 2002-09-09 | 2004-01-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device and method for the detection of material discontinuities in a test specimen |
| CN102879478A (en) * | 2011-10-24 | 2013-01-16 | 南通天华和睿科技创业有限公司 | Electromagnetic ultrasonic detection probe |
| CN202928994U (en) * | 2012-11-22 | 2013-05-08 | 云南电网公司玉溪供电局 | Electromagnetic ultrasonic sensor |
| CN103439418A (en) * | 2013-07-29 | 2013-12-11 | 北京工业大学 | Low-order torsional mode electromagnetic acoustic array transducer |
| CN103616441A (en) * | 2013-12-02 | 2014-03-05 | 天津工业大学 | Electromagnetic ultrasonic signal excitation device applied to ferromagnetic material |
| CN204008560U (en) * | 2014-07-22 | 2014-12-10 | 华中科技大学 | Defect inspection sensor and device based on electromagnetic acoustic longitudinal wave guide |
-
2014
- 2014-07-22 CN CN201410350794.4A patent/CN104122330B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11326286A (en) * | 1998-05-08 | 1999-11-26 | Shin Nippon Hihakai Kensa Kk | Electromagnetic ultrasonic flaw detection apparatus and method using magnetic strain effect |
| DE10241831B3 (en) * | 2002-09-09 | 2004-01-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device and method for the detection of material discontinuities in a test specimen |
| CN102879478A (en) * | 2011-10-24 | 2013-01-16 | 南通天华和睿科技创业有限公司 | Electromagnetic ultrasonic detection probe |
| CN202928994U (en) * | 2012-11-22 | 2013-05-08 | 云南电网公司玉溪供电局 | Electromagnetic ultrasonic sensor |
| CN103439418A (en) * | 2013-07-29 | 2013-12-11 | 北京工业大学 | Low-order torsional mode electromagnetic acoustic array transducer |
| CN103616441A (en) * | 2013-12-02 | 2014-03-05 | 天津工业大学 | Electromagnetic ultrasonic signal excitation device applied to ferromagnetic material |
| CN204008560U (en) * | 2014-07-22 | 2014-12-10 | 华中科技大学 | Defect inspection sensor and device based on electromagnetic acoustic longitudinal wave guide |
Non-Patent Citations (2)
| Title |
|---|
| H.J.SALZBURGER 等: "EMAT pipe inspection with guided waves", 《WELDING IN THE WORLD》 * |
| 杨湖等: "管道裂纹纵向超声导波检测仿真研究", 《中北大学学报(自然科学版)》 * |
Cited By (53)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445362B (en) * | 2015-11-13 | 2018-07-06 | 华中科技大学 | A kind of magnetic striction wave guide detection sensor and detection method based on open magnetic circuit |
| CN105445362A (en) * | 2015-11-13 | 2016-03-30 | 华中科技大学 | Method and device for detecting magnetostrictive guided wave based on open magnetic circuit |
| CN105675717A (en) * | 2016-02-03 | 2016-06-15 | 天津亿利科能源科技发展股份有限公司 | Nondestructive testing structure for submarine pipe in tidal range zone, processing method and testing method |
| CN105973995A (en) * | 2016-06-13 | 2016-09-28 | 华中科技大学 | Electromagnetic ultrasonic probe suitable for detecting round-section steel products and plates |
| CN107102055A (en) * | 2017-04-25 | 2017-08-29 | 武汉中科创新技术股份有限公司 | Electromagnetic ultrasonic guide wave probe detector |
| CN107084692A (en) * | 2017-06-30 | 2017-08-22 | 沈阳工业大学 | Electromagnetic acoustic shear wave thickness measuring transducer |
| CN107127133A (en) * | 2017-06-30 | 2017-09-05 | 沈阳工业大学 | A kind of transverse mode electromagnetic acoustic pipeline detection spiral wave guide energy converter |
| CN107422043A (en) * | 2017-06-30 | 2017-12-01 | 沈阳工业大学 | Electromagnetic acoustic spiral wave guide energy converter is detected outside a kind of p-wave model pipeline |
| CN107127133B (en) * | 2017-06-30 | 2022-06-10 | 沈阳工业大学 | Detection spiral guided wave transducer in transverse wave mode electromagnetic ultrasonic pipeline |
| CN107422043B (en) * | 2017-06-30 | 2023-05-12 | 沈阳工业大学 | Electromagnetic ultrasonic spiral guided wave transducer for detecting outside longitudinal wave mode pipeline |
| CN107422027A (en) * | 2017-09-05 | 2017-12-01 | 北京工业大学 | Torsion mode guided wave magneto strictive sensor based on dual ring permanent volume array |
| CN107607629A (en) * | 2017-09-07 | 2018-01-19 | 安徽科技学院 | Heterogeneous material pipeline section product loss detection method based on supersonic guide-wave technology |
| CN107607623A (en) * | 2017-09-21 | 2018-01-19 | 北京中盈盘古智能技术有限公司 | Squirrel-cage magnetostriction longitudinal mode Guided waves sensor |
| CN107607623B (en) * | 2017-09-21 | 2020-11-24 | 北京中盈盘古智能技术有限公司 | Squirrel-cage magnetostrictive longitudinal mode guided wave detection sensor |
| CN107941855A (en) * | 2017-11-22 | 2018-04-20 | 四川大学 | A kind of pipe end thermal imaging detection device based on permanent magnet rotary heating |
| CN107941901B (en) * | 2018-01-19 | 2024-03-01 | 沈阳工业大学 | High-speed magnetic flux leakage detection system based on step-by-step magnetic saturation structure |
| CN107941901A (en) * | 2018-01-19 | 2018-04-20 | 沈阳工业大学 | A kind of High Speed Magnetic Flux Leakage detecting system based on magnetic saturation structure step by step |
| CN111656142A (en) * | 2018-01-30 | 2020-09-11 | 梅科斯股份公司 | Non-contact radial position sensor with improved response to target defects |
| CN108508085B (en) * | 2018-02-09 | 2020-10-23 | 清华大学 | Torsional mode magnetostrictive sensor, pipeline detection system and method |
| CN108508085A (en) * | 2018-02-09 | 2018-09-07 | 清华大学 | A kind of torsion mode magneto strictive sensor, pipe detection system and method |
| CN108562642A (en) * | 2018-02-09 | 2018-09-21 | 清华大学 | Electromagnet transduction device, the pipe detection system and method for longitudinal mode supersonic guide-wave |
| CN108562642B (en) * | 2018-02-09 | 2020-07-24 | 清华大学 | Electromagnetic transduction device of longitudinal mode ultrasonic guided wave, pipeline detection system and method |
| CN108508089A (en) * | 2018-04-13 | 2018-09-07 | 沈阳工业大学 | Electromagnetic supersonic flaw detecting transducer architecture is detected outside circular pipe |
| CN108760896A (en) * | 2018-04-13 | 2018-11-06 | 沈阳工业大学 | Electromagnetic supersonic flaw detecting transducer architecture is detected in circular pipe |
| CN108535365B (en) * | 2018-04-13 | 2020-10-23 | 沈阳工业大学 | Square pipeline external detection electromagnetic ultrasonic flaw detection transducer structure |
| CN108534721B (en) * | 2018-04-13 | 2020-10-23 | 沈阳工业大学 | Square pipeline external detection electromagnetic ultrasonic thickness measuring transducer structure |
| CN110375687A (en) * | 2018-04-13 | 2019-10-25 | 沈阳工业大学 | Electromagnetic ultrasonic thickness measuring transducer architecture is detected in square pipe |
| CN108680650A (en) * | 2018-04-13 | 2018-10-19 | 沈阳工业大学 | Electromagnetic supersonic flaw detecting transducer architecture is detected in square pipe |
| CN108225228A (en) * | 2018-04-13 | 2018-06-29 | 沈阳工业大学 | Detection electromagnetic ultrasonic thickness measuring transducer architecture in circular pipe |
| CN108692683A (en) * | 2018-04-13 | 2018-10-23 | 沈阳工业大学 | Electromagnetic ultrasonic thickness measuring transducer architecture is detected outside circular pipe |
| CN108535365A (en) * | 2018-04-13 | 2018-09-14 | 沈阳工业大学 | Electromagnetic supersonic flaw detecting transducer architecture is detected outside square pipe |
| CN108534721A (en) * | 2018-04-13 | 2018-09-14 | 沈阳工业大学 | Electromagnetic ultrasonic thickness measuring transducer architecture is detected outside square pipe |
| CN108776178A (en) * | 2018-05-14 | 2018-11-09 | 南京航空航天大学 | A kind of electromagnet ultrasonic changer and its working method for exciting pipeline torsion guided wave |
| CN108802185A (en) * | 2018-06-26 | 2018-11-13 | 哈尔滨工业大学 | Metal material defects detection sensor based on impulse eddy current and electromagnetic acoustic |
| CN108802185B (en) * | 2018-06-26 | 2020-12-29 | 哈尔滨工业大学 | Metal material defect detection sensor based on pulse eddy current and electromagnetic ultrasound |
| CN109187749B (en) * | 2018-09-27 | 2020-01-21 | 华中科技大学 | Bending mode guided wave sensor |
| CN109187749A (en) * | 2018-09-27 | 2019-01-11 | 华中科技大学 | A kind of mode of flexural vibration guided wave sensor |
| CN109374756A (en) * | 2018-11-30 | 2019-02-22 | 上海市特种设备监督检验技术研究院 | A kind of dedicated super magnetic conductor excitation patch and detection method for heat exchanger tube detection |
| CN110514743A (en) * | 2019-09-03 | 2019-11-29 | 厦门大学 | A kind of electromagnetic supersonic flaw detecting method and device of pipeline defect detection |
| CN110568060A (en) * | 2019-10-15 | 2019-12-13 | 厦门大学 | Coil self-excited ferromagnetic pipeline electromagnetic ultrasonic transducer, excitation device and receiving device |
| CN110988110B (en) * | 2019-12-10 | 2022-04-01 | 华中科技大学 | Magnetostrictive guided wave transducer |
| CN110988110A (en) * | 2019-12-10 | 2020-04-10 | 华中科技大学 | Magnetostrictive guided wave transducer |
| CN111118329A (en) * | 2020-01-19 | 2020-05-08 | 江苏大学 | Preparation method and device of high-toughness high-neutron absorption aluminum-based composite material |
| CN111505119A (en) * | 2020-05-08 | 2020-08-07 | 清华大学 | Flexible ultrasonic fatigue damage detection device and manufacturing method thereof |
| CN111505121A (en) * | 2020-05-22 | 2020-08-07 | 西安交通大学 | Interpolation type full-coil structure electromagnetic ultrasonic longitudinal guided wave probe and nondestructive testing method |
| CN112114028B (en) * | 2020-08-26 | 2022-06-14 | 厦门大学 | Bolt hole edge crack monitoring method based on multi-field coupling sensor |
| CN112114028A (en) * | 2020-08-26 | 2020-12-22 | 厦门大学 | Bolt hole edge crack monitoring method based on multi-field coupling sensor |
| CN112414337A (en) * | 2020-12-01 | 2021-02-26 | 湖北工业大学 | Externally-penetrating annular array electromagnetic ultrasonic thickness measuring probe |
| CN112945476A (en) * | 2021-02-09 | 2021-06-11 | 马丽娟 | Small pressure container trace gas leakage emergency ultrasonic detection system and method |
| CN112945476B (en) * | 2021-02-09 | 2022-08-16 | 马丽娟 | Small pressure container trace gas leakage emergency ultrasonic detection system and method |
| CN116242239A (en) * | 2022-12-09 | 2023-06-09 | 江汉大学 | Method and device for detecting thickness of nodular cast iron pipe |
| CN116735700A (en) * | 2023-08-08 | 2023-09-12 | 国机传感科技有限公司 | Pipeline defect stress composite detection sensor and detection method |
| CN116735700B (en) * | 2023-08-08 | 2023-12-08 | 沈阳仪表科学研究院有限公司 | Pipeline defect stress composite detection sensor and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104122330B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104122330A (en) | Pipeline defect detection method and device based on electromagnetic ultrasonic longitudinal guided waves | |
| CN204008560U (en) | Defect inspection sensor and device based on electromagnetic acoustic longitudinal wave guide | |
| US10175202B2 (en) | Magnetostrictively induced guided wave sensor device | |
| CN108562642B (en) | Electromagnetic transduction device of longitudinal mode ultrasonic guided wave, pipeline detection system and method | |
| CN204129008U (en) | Magnetostrictive guided-wave sensor and the heat exchanger tube defect detecting system containing sensor | |
| CN104198580B (en) | Magnetostrictive guided-wave sensor and the heat exchanger tube defect detecting system that contains sensor | |
| CN104007180A (en) | Torsional mode magnetostriction sensor array | |
| CN108593784A (en) | A kind of contactless electromagnet ultrasonic changer and detection method that can generate torsion guided wave | |
| CN103439418A (en) | Low-order torsional mode electromagnetic acoustic array transducer | |
| CN104122329B (en) | Based on the detecting sensor of magnetic striction wave guide, detection system and application | |
| CN102520057B (en) | Magnetostrictive guided-wave sensor for detection in heat exchange tube and detection method thereof | |
| Liu et al. | A flexible and noncontact guided-wave transducer based on coils-only EMAT for pipe inspection | |
| CN110514743A (en) | A kind of electromagnetic supersonic flaw detecting method and device of pipeline defect detection | |
| CN110568060A (en) | Coil self-excited ferromagnetic pipeline electromagnetic ultrasonic transducer, excitation device and receiving device | |
| Liu et al. | Development of a shear horizontal wave electromagnetic acoustic transducer with periodic grating coil | |
| CN115389621A (en) | Non-contact electromagnetic acoustic type torsional mode guided wave transduction system in pipe and test method | |
| CN202101974U (en) | Electromagnetic-acoustic transducer (EMAT) for detection of condenser stainless steel bellows | |
| Sun et al. | A modified design of the omnidirectional EMAT for antisymmetric Lamb wave generation | |
| CN205210021U (en) | Magnetic induced shrinkage or elongation guided wave detects sensor and detecting system based on open magnetic circuit | |
| Cai et al. | Enhancement of Lamb-EMAT signal using a modified one-side pitch-catch design | |
| CN110152963A (en) | A kind of periodic permanent magnet iron formula omni-directional horizontal shear mode Electromagnetic Acoustic Transducer | |
| RU177945U1 (en) | Device for ultrasonic inspection of the pipeline | |
| CN107817292B (en) | The whole directive property Corkscrews Lamb wave energy converter of double array adjustables of guided wave tomography | |
| CN204008561U (en) | Guided wave sensor based on magnetostrictive effect | |
| CN109470774A (en) | Ultrasonic guided wave focusing energy converter based on aluminium sheet defects detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20210722 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |