CN114858106B - Longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe - Google Patents
Longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe Download PDFInfo
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- CN114858106B CN114858106B CN202210332811.6A CN202210332811A CN114858106B CN 114858106 B CN114858106 B CN 114858106B CN 202210332811 A CN202210332811 A CN 202210332811A CN 114858106 B CN114858106 B CN 114858106B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2431—Probes using other means for acoustic excitation, e.g. heat, microwaves, electron beams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention provides a longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe which consists of a plurality of rectangular magnet groups with identical magnetic poles arranged face to face, two reverse-folded coils, a signal connecting wire and a probe shell, wherein one coil conductor part is positioned under a magnet, a coil gap is opposite to the gap of the magnet group, the other coil conductor part is positioned in the magnet gap, and the coil gap is positioned under the magnet group. The probe is directly close to the surface of a tested piece, and magnetic force lines are emitted by two magnets N poles arranged face to face and pass through gaps of the magnets N poles to return to the adjacent two magnets S poles. A horizontal magnetic field is generated directly below the magnets, and a vertical magnetic field is generated between the two magnets. The two coils are respectively supplied with pulse current and interact with a horizontal magnetic field to form Lorentz force which is vertical to the surface of the metal and in the same direction, so that the excitation and the reception of longitudinal waves are realized in the metal. Interaction with the vertical magnetic field creates a lorentz force parallel to the metal surface and in the same direction, thereby effecting excitation and reception of transverse waves in the metal.
Description
Technical Field
The invention relates to a non-contact ultrasonic detection technology, in particular to a novel longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe which can generate ultrasonic longitudinal waves and ultrasonic transverse waves and can be used for calibrating thickness measurement of metal materials.
Background
Since the excitation and reception of bulk waves are currently mostly produced by conventional piezoelectric ultrasound. The traditional piezoelectric ultrasound has the advantages of high sensitivity, high signal to noise ratio, simple structure, reliable operation, light weight and the like. The disadvantages are that a coupling agent is required and that the output dc response is poor. The electromagnetic ultrasonic has the characteristics of flexible generation of various waveforms, low requirement on the surface quality of a detected workpiece, high detection speed and the like, and the electromagnetic ultrasonic has more application research on surface waves at home and abroad at present, and has less body wave research on the electromagnetic ultrasonic generated in metal. Therefore, development of a novel longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe is very necessary.
Disclosure of Invention
The invention aims to provide a novel longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe with small volume, light weight and low power consumption, which is characterized in that a plurality of rectangular magnet groups with the same magnetic poles arranged face to face are used for providing horizontal and vertical bias magnetic fields, and two reverse-folded coils are used for exciting and receiving signals, so that the integrated receiving and transmitting can be realized, ultrasonic longitudinal waves and ultrasonic transverse waves are easily excited and received in nonferromagnetic materials, and the probe can be used for calibrating thickness measurement of metal materials.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe consists of a rectangular magnet group 2, a first reverse-folded coil 4, a second reverse-folded coil 8, a first signal connecting wire 5, a second signal connecting wire 6 and a probe shell 1 for fixing the rectangular magnet group, wherein the rectangular magnet group 2 consists of a plurality of magnets with the same magnetic poles arranged face to face, and the whole probe is of a cuboid structure;
when the electromagnetic ultrasonic probe is used, the electromagnetic ultrasonic probe is directly close to the surface of a detected metal component, magnetic lines of force 3 are emitted by N poles of two adjacent magnets which are arranged face to face, pass through gaps of the two adjacent magnets and return to S poles of the two adjacent magnets, horizontal magnetic fields which are alternately arranged left/right are formed under the two magnets, and vertical magnetic fields which are alternately arranged up/down and are perpendicular to the surface of the detected metal component are formed between the two magnets; the first reverse-folded coil 4 is fixed below the magnet, the coil conductor part is positioned right below the magnet, and the coil gap is opposite to the magnet gap; the second reverse-folded coil 8 is fixed at the magnet gap, the coil conductor part is positioned at the magnet gap, and the coil gap is positioned right below the magnet; the first reverse-turn type coils 4 and the second reverse-turn type coils 8 are mutually staggered, respectively pass through the incident frequency pulse current, induce eddy currents 7 which are alternately arranged on the surface of the detected metal member, and interact the eddy currents 7 with a horizontal magnetic field to form first Lorentz force 9 which is perpendicular to the surface 13 of the detected metal member and in the same direction, so that the high-efficiency excitation and the high-efficiency reception of ultrasonic longitudinal waves 11 are realized in the detected metal member; the eddy currents 7 interact with the vertical magnetic field to form second lorentz forces 10 parallel to the surface of the metal member under test and in the same direction, thereby achieving efficient excitation and reception of ultrasonic transverse waves 12 in the metal member under test.
The rectangular magnet group (2) can simultaneously generate a horizontal magnetic field and a vertical magnetic field perpendicular to the metal surface, and is compact and simple in structure and convenient to move.
The first reverse-turn coil 4 and the second reverse-turn coil 8 can excite signals and also receive signals, realize signal receiving and transmitting integration, easily generate ultrasonic longitudinal waves 11 and ultrasonic transverse waves 12 in non-ferromagnetic materials, and have the advantages of high conversion efficiency and low power consumption.
Compared with the prior art, the invention has the following advantages:
1) The traditional electromagnetic ultrasonic probe can only be used for detecting single waveform, but the electromagnetic ultrasonic probe can not only realize the efficient excitation and reception of ultrasonic longitudinal waves, but also realize the efficient excitation and reception of ultrasonic transverse waves, and can be used for the calibration of thickness measurement of metal materials. The detection efficiency is high, portable.
2) The rectangular magnet group 2 of the probe can provide a horizontal bias magnetic field and a vertical bias magnetic field perpendicular to a tested piece, is easy to generate ultrasonic longitudinal waves and transverse waves in non-ferromagnetic materials, and has the advantages of high conversion efficiency, low power consumption and the like.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the probe of the present invention.
FIG. 2 is a schematic diagram of the longitudinal wave excitation and detection signals of the probe according to the present invention.
FIG. 3 is a schematic diagram of the probe transverse wave excitation and detection signals of the present invention.
Fig. 4 is a schematic diagram of a reverse turn coil according to the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1, the invention provides a novel longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe, which consists of a rectangular magnet group 2 formed by a plurality of magnets with the same magnetic poles arranged face to face, a first reverse-turn coil 4, a second reverse-turn coil 8, a first signal connecting wire 5, a second signal connecting wire 6 and a probe shell 1 for fixing the rectangular magnet group, wherein the whole probe is in a cuboid structure.
The novel longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe is provided with a rectangular magnet group 2 formed by a plurality of magnets with the same magnetic poles arranged face to face, can simultaneously generate a horizontal magnetic field and a vertical magnetic field perpendicular to the metal surface, has a compact and simple structure, provides preconditions for exciting ultrasonic longitudinal waves and ultrasonic transverse waves, and is compact in structure and easy to carry.
As shown in fig. 4, the first reverse-turn coil 4 and the second reverse-turn coil 8 have reverse-turn structures, i.e. can excite signals and receive signals, thereby realizing the integration of receiving and transmitting.
The probe of the present invention will be described in further detail with reference to fig. 2, 3 and the detailed description.
The working principle of the invention is as follows: the probe can be used for calibrating the thickness of a metal material. First, a thick non-ferromagnetic metal block 13 is prepared, and when an incident current is applied to a first turn-back coil 4 located directly below a rectangular magnet group 2 composed of a plurality of magnets arranged with the same magnetic poles facing each other, as shown in fig. 2, a horizontal magnetic field parallel to the non-ferromagnetic metal block 13 is generated directly below the magnets in the rectangular magnet group 2, and the surface of the non-ferromagnetic metal block 13 corresponds to an integral conductive circuit, so that an electric current, i.e., an eddy current 7, is induced from the surface of the non-ferromagnetic metal block. The eddy current 7 generates a first lorentz force 9 perpendicular to the non-ferromagnetic metal block and in the same direction under the action of a horizontal magnetic field, while the medium in the non-ferromagnetic metal block 13 generates an ultrasonic longitudinal wave 11 under the action of stress, the ultrasonic longitudinal wave 11 generates an echo signal based on the inverse effect of the lorentz force, and the signal is then received by the quantitative analysis device through the first signal connection line 5.
When an incident electromagnetic current is applied to the second turn-back coil 8 positioned in the gap of the rectangular magnet assembly 2 formed by magnets having the same magnetic poles arranged face to face, as shown in fig. 3, a vertical magnetic field perpendicular to the non-ferromagnetic metal block 13 is generated by the magnet gap in the rectangular magnet assembly 2, and the surface of the non-ferromagnetic metal block 13 corresponds to an overall conductive loop, so that the surface of the metal block induces an electric current, i.e., eddy current 7. The eddy currents 7 under the influence of the vertical magnetic field generate a second lorentz force 10 parallel to the non-ferromagnetic metal block and in the same direction, whereas the medium in the non-ferromagnetic metal block 13 under the influence of the stress will generate an ultrasonic transverse wave 12, which ultrasonic transverse wave 12 generates an echo signal based on the inverse effect of the lorentz force, which signal is subsequently received by the quantitative analysis device via the second signal connection line 6.
The quantitative analysis device for the echo signals can be used for calibrating thickness measurement of the metal materials by quantitatively analyzing the two echo signals.
Claims (3)
1. The utility model provides a longitudinal wave-transversal wave integration electromagnetic ultrasonic probe which characterized in that: the probe consists of a rectangular magnet group (2), a first reverse-folded coil (4), a second reverse-folded coil (8), a first signal connecting wire (5), a second signal connecting wire (6) and a probe shell (1) for fixing the rectangular magnet group, wherein the rectangular magnet group (2) consists of a plurality of magnets with the same magnetic poles arranged face to face, and the whole probe is of a cuboid structure;
when the electromagnetic ultrasonic probe is used, the electromagnetic ultrasonic probe is directly close to the surface of a detected metal component, magnetic lines of force (3) are emitted from N poles of two adjacent magnets which are arranged face to face, pass through gaps of the two adjacent magnets and return to S poles of the two adjacent magnets, horizontal magnetic fields which are alternately arranged left/right are formed under the two magnets, and vertical magnetic fields which are alternately arranged up/down and are perpendicular to the surface of the detected metal component are formed between the two magnets; the first reverse-folded coil (4) is fixed below the magnet, the coil conductor part is positioned right below the magnet, and the coil gap is opposite to the magnet gap; the second reverse-folded coil (8) is fixed at the magnet gap, the coil conductor part is positioned at the magnet gap, and the coil gap is positioned right below the magnet; the first reverse-turn type coils (4) and the second reverse-turn type coils (8) are mutually staggered, respectively pass through the incident frequency pulse current, induce eddy currents (7) which are alternately arranged on the surface of the detected metal member, and interact the eddy currents (7) with a horizontal magnetic field to form first Lorentz force (9) which is perpendicular to the surface (13) of the detected metal member and in the same direction, so that the efficient excitation and the reception of ultrasonic longitudinal waves (11) are realized in the detected metal member; the eddy current (7) interacts with the vertical magnetic field to form a second lorentz force (10) parallel to the surface of the detected metal member and in the same direction, so that efficient excitation and reception of ultrasonic transverse waves (12) are realized in the detected metal member.
2. The longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe according to claim 1, characterized in that: the rectangular magnet group (2) can simultaneously generate a horizontal magnetic field and a vertical magnetic field perpendicular to the metal surface, and is compact and simple in structure and convenient to move.
3. The longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe according to claim 1, characterized in that: the first reverse-turn coil (4) and the second reverse-turn coil (8) can excite signals and also receive signals, realize signal receiving and transmitting integration, are easy to generate ultrasonic longitudinal waves (11) and ultrasonic transverse waves (12) in non-ferromagnetic materials, and have the advantages of high conversion efficiency and low power consumption.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210332811.6A CN114858106B (en) | 2022-03-31 | 2022-03-31 | Longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe |
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| CN202210332811.6A CN114858106B (en) | 2022-03-31 | 2022-03-31 | Longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe |
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| CN114858106A CN114858106A (en) | 2022-08-05 |
| CN114858106B true CN114858106B (en) | 2023-05-23 |
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| CN112050981A (en) * | 2020-08-11 | 2020-12-08 | 大连理工大学 | Structure integrated type electromagnetic ultrasonic transverse and longitudinal wave stress measurement method |
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| JP2000146923A (en) * | 1998-11-05 | 2000-05-26 | Nkk Corp | Ultrasonic measurement method for steel material |
| JP3826727B2 (en) * | 2000-04-28 | 2006-09-27 | Ｊｆｅスチール株式会社 | Method and apparatus for determining solidification state of slab and method for producing continuous cast slab |
| CN101398298B (en) * | 2008-11-10 | 2010-09-29 | 清华大学 | Electromagnetical ultrasonic thickness-measuring method |
| CN102023186B (en) * | 2010-12-29 | 2013-07-31 | 钢铁研究总院 | Electromagnetic ultrasonic probe and method for detecting pipeline by using same |
| JP5959177B2 (en) * | 2011-10-20 | 2016-08-02 | 三菱電機株式会社 | Electromagnetic ultrasonic probe and electromagnetic ultrasonic flaw detector |
| CN202305485U (en) * | 2011-10-24 | 2012-07-04 | 南通天华和睿科技创业有限公司 | Electromagnetic ultrasonic detection probe |
| CN206177893U (en) * | 2016-11-10 | 2017-05-17 | 武汉优凯检测技术有限公司 | A formula electromagnetic acoustic transducer is directly gone into to shear wave for rod is detected a flaw |
| CN212693676U (en) * | 2020-04-27 | 2021-03-12 | 中国特种设备检测研究院 | Flexible electromagnetic ultrasonic probe of periodic magnet |
| CN113640391A (en) * | 2020-04-27 | 2021-11-12 | 中国特种设备检测研究院 | Flexible electromagnetic ultrasonic probe of periodic magnet |
| CN114216600A (en) * | 2021-12-15 | 2022-03-22 | 北京工业大学 | L based on double-folding coil electromagnetic acoustic sensorCRWave sound beam deflection regulating and controlling method |
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| CN112050981A (en) * | 2020-08-11 | 2020-12-08 | 大连理工大学 | Structure integrated type electromagnetic ultrasonic transverse and longitudinal wave stress measurement method |
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