CN107421474B - Electromagnetic ultrasonic thickness measuring probe for measuring thickness of workpiece - Google Patents
Electromagnetic ultrasonic thickness measuring probe for measuring thickness of workpiece Download PDFInfo
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- CN107421474B CN107421474B CN201710274314.4A CN201710274314A CN107421474B CN 107421474 B CN107421474 B CN 107421474B CN 201710274314 A CN201710274314 A CN 201710274314A CN 107421474 B CN107421474 B CN 107421474B
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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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- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to an electromagnetic ultrasonic thickness measuring probe for measuring the thickness of a workpiece, which is structurally characterized in that an electromagnetic ultrasonic coil, a magnetism-gathering permanent magnet, a magnetic conduction wedge and two polyester capacitors are respectively arranged in a shell, two signal connectors are led into the shell and are respectively connected with the two polyester capacitors, the two polyester capacitors are arranged above the magnetism-gathering permanent magnet, the magnetic conduction wedge is arranged below the magnetism-gathering permanent magnet, and the electromagnetic ultrasonic coil is fixed at the bottom end of the magnetic conduction wedge. The electromagnetic ultrasonic coil excites high-voltage pulse to generate ultrasonic wave, and the magnetic-gathering permanent magnet provides a magnetic field and the shell effectively protects the coil and the magnet. Because the ultrasonic wave is excited through the electromagnetic mode, when detecting high temperature or stainless steel work piece, the advantages such as need not couplant, need not to polish work piece coating, realize single independent and quick detection, reduce the waste of manpower and materials, detection efficiency is high and the testing result is stable, filled in the electromagnetic ultrasonic detection to high temperature or stainless steel equipment and work piece detect blank.
Description
Technical Field
The invention relates to an electromagnetic ultrasonic thickness measuring probe for measuring the thickness of a workpiece; belongs to the technical field of electromagnetic ultrasonic detection industry.
Background
In the ultrasonic inspection industry, while most of the cases are addressed by piezoelectric ultrasound, in many cases it is desirable to inspect some high temperature equipment and workpieces with coatings, paints. Since conventional ultrasonic cannot detect high-temperature equipment, polishing is required for detecting a workpiece with a coating or paint, the operation is troublesome, much manpower and material resources are required to be consumed, and some in-service equipment cannot be polished, so that electromagnetic ultrasonic detection technology or other technologies must be applied. However, the conventional electromagnetic ultrasonic thickness measuring probe cannot detect high-temperature equipment and measure the thickness of the stainless steel workpiece because the conventional electromagnetic ultrasonic probe cannot bear high temperature and because the stainless steel workpiece is not magnetic-focusing nor magnetic-conducting. Therefore, finding a proper high-temperature-resistant material and how to improve the accuracy of an electromagnetic ultrasonic thickness measuring probe in detecting the thickness of a stainless steel workpiece is a problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides an electromagnetic ultrasonic thickness measuring probe for measuring the thickness of a workpiece, which can be used for detecting high-temperature equipment or stainless steel equipment, reduces manpower and material resources, and provides reliable and stable detection results while improving the detection efficiency.
In order to achieve the above object, the present invention adopts the following technical scheme:
the utility model provides a measure electromagnetic ultrasonic thickness measuring probe of work piece thickness, includes electromagnetic ultrasonic coil, gathers permanent magnet, magnetic conduction wedge, two polyester electric capacities, two signal connector, casing, its characterized in that: the two electromagnetic ultrasonic coils, the magnetism-gathering permanent magnet, the magnetic conduction wedge and the two polyester capacitors are respectively arranged in the shell, the two signal connectors are led into the shell to be respectively connected with the two polyester capacitors, the two polyester capacitors are arranged above the magnetism-gathering permanent magnet, the magnetic conduction wedge is arranged below the magnetism-gathering permanent magnet, and the two electromagnetic ultrasonic coils are fixed at the bottom ends of the magnetic conduction wedge.
The magnetic focusing permanent magnet provides a strong bias magnetic field, the magnetic conducting wedge is used for conducting the magnetic field, and the probe shell is used for protecting and fixing the electromagnetic ultrasonic coil and the magnetic focusing permanent magnet.
The shell consists of a shell upper cover, a shell lower cover and a shell bottom frame.
The electromagnetic ultrasonic coil is made of high-temperature resistant materials, and the surface of the electromagnetic ultrasonic coil is coated with high-temperature resistant insulating paint.
The magnetism-gathering permanent magnet is made of high-temperature-resistant samarium cobalt materials.
The invention also comprises a handle which is arranged on the upper cover of the shell and is wrapped by sponge.
The two polyester capacitors are arranged in the upper cover of the shell, one is used for matching transmitting impedance, and the other is used for matching receiving impedance, so that the electromagnetic ultrasonic coil can achieve the best detection effect.
The magnetic-gathering permanent magnet consists of 5 permanent magnets, wherein one large magnet is arranged in the middle and the N pole is downward, 4 small magnets around the large magnet wrap the middle large magnet, and the N pole of each small magnet faces the large magnet, so that the magnetic-gathering purpose is achieved.
The bottom frame of the shell is provided with a striped stainless steel sheet for placing and fixing the electromagnetic ultrasonic coil, so that the electromagnetic ultrasonic coil can be protected, and meanwhile, the sensitivity of detection is not affected.
The invention has the advantages that: the invention is based on the electromagnetic ultrasonic detection principle, wherein an electromagnetic ultrasonic coil is responsible for exciting ultrasonic waves, a magnetism-gathering permanent magnet provides a strong magnetic field, a magnetic conduction wedge guides the magnetic field to act on the surface of the coil, and a shell is used for fixing and protecting the electromagnetic ultrasonic coil and the magnetism-gathering permanent magnet. When the probe is used for measuring thickness, the ultrasonic wave is excited in an electromagnetic mode, so that the advantages of no coupling agent, no polishing of workpiece coating and the like are needed when the high-temperature or stainless steel workpiece is detected, the single-person independent and rapid detection can be realized, the use is convenient, the waste of manpower and material resources is reduced, the detection efficiency is high, the detection result is stable, and the gap for detecting the high-temperature or stainless steel equipment and the workpiece in electromagnetic ultrasonic detection is filled.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a front view of a concentrated permanent magnet in an embodiment of the invention;
FIG. 4 is a front view of a housing base frame in an embodiment of the invention;
meaning of reference numerals in the drawings: 1. the device comprises a shell upper cover, a signal connector, a polyester capacitor, a shell lower cover, a permanent magnet for collecting magnetism, a magnetic conduction wedge, an electromagnetic ultrasonic coil, a shell bottom frame, a probe handle and a probe handle, wherein the shell upper cover, the signal connector, the polyester capacitor, the shell lower cover, the magnetic conduction wedge and the magnetic conduction permanent magnet are sequentially arranged in sequence, and the magnetic conduction wedge and the probe handle are sequentially arranged.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
As shown in fig. 1, 2, 3 and 4, the invention comprises an electromagnetic ultrasonic coil 7, a magnetism-gathering permanent magnet 5, a magnetic conduction wedge 6, two polyester capacitors 3, a signal connector 2 and a handle 9, wherein the shell consists of a shell upper cover 1, a shell lower cover 4 and a shell bottom frame 8, and is characterized in that: the two polyester capacitors 3 are arranged in the upper cover 1 of the shell by using strong glue, one is used for matching transmitting impedance, the other is used for matching receiving impedance, the two signal connectors are led into the shell and are respectively connected with the two polyester capacitors, the electromagnetic ultrasonic coil 7, the magnetism-gathering permanent magnet 5 and the magnetic conduction wedge 6 are arranged in the lower cover 4 of the shell by using strong glue, the magnetic conduction wedge 6 is arranged below the magnetism-gathering permanent magnet 5, the electromagnetic ultrasonic coil 7 is fixed at the bottom end of the magnetic conduction wedge 6, the handle is arranged on the upper cover 1 of the shell, and the handle is wrapped by sponge.
As shown in fig. 3, the magnetic focusing permanent magnet 5 is composed of 5 permanent magnets, wherein one large magnet is placed in the middle and the N pole is downward, 4 small magnets around wrap the middle large magnet, and the N pole of each small magnet faces the large magnet, so as to achieve the purpose of magnetic focusing.
The electromagnetic ultrasonic coil excites high-voltage pulse to generate ultrasonic waves, the magnetic-gathering permanent magnet provides a strong magnetic field and ensures that magnetic force lines can well pass through a stainless steel workpiece to be measured, so that the purpose of measuring the thickness of the stainless steel is achieved.
The probe handle 9 can well control the magnetic probe, and detection can be easily completed by utilizing the lever principle.
Referring to fig. 4, the bottom frame 8 of the shell is provided with a plurality of stripe-shaped stainless steel sheets, so that the coil can be well protected, the sensitivity is not affected, and the service life of the probe is prolonged.
When the high-temperature workpiece is detected, the electromagnetic ultrasonic coil is replaced by a high-temperature resistant material, and the surface of the electromagnetic ultrasonic coil is coated with high-temperature resistant insulating paint. The magnetism-gathering permanent magnet 5 is made of high-temperature-resistant samarium cobalt material.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.
Claims (5)
1. The utility model provides a measure electromagnetic ultrasonic thickness measuring probe of work piece thickness, includes electromagnetic ultrasonic coil, gathers permanent magnet, magnetic conduction wedge, two polyester electric capacities, two signal connector, casing, its characterized in that: the electromagnetic ultrasonic coil, the magnetism-gathering permanent magnet, the magnetic conduction wedge and the two polyester capacitors are respectively arranged in the shell, the two signal connectors are led into the shell to be respectively connected with the two polyester capacitors, the two polyester capacitors are arranged above the magnetism-gathering permanent magnet, the magnetic conduction wedge is arranged below the magnetism-gathering permanent magnet, and the two electromagnetic ultrasonic coils are fixed at the bottom ends of the magnetic conduction wedge;
the magnetic-gathering permanent magnet is made of high-temperature-resistant samarium cobalt material, and consists of 5 permanent magnets, wherein one large magnet is arranged in the middle and the N pole is downward, 4 small magnets around wrap the middle large magnet, and the N pole of each small magnet faces the large magnet;
the two polyester capacitors are arranged in the upper cover of the shell, one is used for matching the transmitting impedance, and the other is used for matching the receiving impedance.
2. The electromagnetic ultrasonic thickness probe for measuring thickness of a workpiece according to claim 1, wherein: the shell consists of a shell upper cover, a shell lower cover and a shell bottom frame.
3. An electromagnetic ultrasonic thickness probe for measuring thickness of a workpiece according to claim 1 or 2, wherein: the electromagnetic ultrasonic coil arranged in the bottom frame of the shell is made of high-temperature resistant materials, and the outer surface of the electromagnetic ultrasonic coil is coated with high-temperature resistant insulating paint.
4. An electromagnetic ultrasonic thickness probe for measuring thickness of a workpiece according to claim 1 or 2, wherein: the novel portable electric power tool also comprises a handle, wherein the handle is arranged on the upper cover of the shell, and the handle is wrapped by sponge.
5. An electromagnetic ultrasonic thickness probe for measuring thickness of a workpiece as defined in claim 2, wherein: the bottom frame of the shell is provided with a striped stainless steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710274314.4A CN107421474B (en) | 2017-04-25 | 2017-04-25 | Electromagnetic ultrasonic thickness measuring probe for measuring thickness of workpiece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710274314.4A CN107421474B (en) | 2017-04-25 | 2017-04-25 | Electromagnetic ultrasonic thickness measuring probe for measuring thickness of workpiece |
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| Publication Number | Publication Date |
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| CN107421474A CN107421474A (en) | 2017-12-01 |
| CN107421474B true CN107421474B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710274314.4A Active CN107421474B (en) | 2017-04-25 | 2017-04-25 | Electromagnetic ultrasonic thickness measuring probe for measuring thickness of workpiece |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121678B (en) * | 2018-10-31 | 2021-06-01 | 中国石油天然气股份有限公司 | Pipeline wall thickness detection method and device |
| CN111964615A (en) * | 2020-08-25 | 2020-11-20 | 上海派逊金属材料有限公司 | Digital display thickness gauge |
| CN114512298A (en) * | 2022-02-18 | 2022-05-17 | 重庆交通大学 | Magnet device for enhancing received signal, received signal enhancing device and laser bonding force detection device |
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| JPS61153513A (en) * | 1984-12-27 | 1986-07-12 | Sumitomo Metal Ind Ltd | Electromagnetic ultrasonic measuring instrument |
| GB2171521A (en) * | 1985-01-22 | 1986-08-28 | Siderca Sa Ind & Com | Device for measuring thicknesses by means of ultrasound |
| EP0517481A2 (en) * | 1991-06-03 | 1992-12-09 | Simmonds Precision Products Inc. | Detection of magnetic field changes |
| JP2000225378A (en) * | 1999-02-03 | 2000-08-15 | Masaya Tanitsu | Intricate oscillation utilizing characteristics of magnetic fluid |
| CN102954774A (en) * | 2012-10-26 | 2013-03-06 | 华中科技大学 | Electromagnetic ultrasonic measuring device for wall thickness of steel tube based on magnetic focusing bridge circuit |
| JP2013210200A (en) * | 2012-03-30 | 2013-10-10 | Kawasaki Heavy Ind Ltd | Ultrasonic thickness measuring device and ultrasonic thickness measuring method |
| CN105222732A (en) * | 2015-10-21 | 2016-01-06 | 湖北工业大学 | The electromagnetic ultrasonic thickness measuring probe that a kind of rotation controlled magnetic force can break |
| CN105606713A (en) * | 2016-03-01 | 2016-05-25 | 武汉中科创新技术股份有限公司 | Electromagnetic ultrasonic detection probe for zirconium pipe rod |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3727933B2 (en) * | 2003-05-12 | 2005-12-21 | 核燃料サイクル開発機構 | Electromagnetic ultrasonic probe |
| CN203479275U (en) * | 2013-11-25 | 2014-03-12 | 广东汕头超声电子股份有限公司 | High-temperature resistant electromagnetic ultrasonic thickness measurement probe |
| CN104880163A (en) * | 2015-06-03 | 2015-09-02 | 衡阳镭目科技有限责任公司 | Electromagnetic ultrasonic sensor and pipeline wall thickness detection system |
| CN106441179A (en) * | 2016-11-30 | 2017-02-22 | 武汉优凯检测技术有限公司 | Electromagnetic ultrasonic transducer for measuring thickness of globular graphite cast tube |
| CN206772250U (en) * | 2017-04-25 | 2017-12-19 | 武汉中科创新技术股份有限公司 | A kind of electromagnetic ultrasonic thickness measuring probe for measuring thickness of workpiece |
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2017
- 2017-04-25 CN CN201710274314.4A patent/CN107421474B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61153513A (en) * | 1984-12-27 | 1986-07-12 | Sumitomo Metal Ind Ltd | Electromagnetic ultrasonic measuring instrument |
| GB2171521A (en) * | 1985-01-22 | 1986-08-28 | Siderca Sa Ind & Com | Device for measuring thicknesses by means of ultrasound |
| EP0517481A2 (en) * | 1991-06-03 | 1992-12-09 | Simmonds Precision Products Inc. | Detection of magnetic field changes |
| JP2000225378A (en) * | 1999-02-03 | 2000-08-15 | Masaya Tanitsu | Intricate oscillation utilizing characteristics of magnetic fluid |
| JP2013210200A (en) * | 2012-03-30 | 2013-10-10 | Kawasaki Heavy Ind Ltd | Ultrasonic thickness measuring device and ultrasonic thickness measuring method |
| CN102954774A (en) * | 2012-10-26 | 2013-03-06 | 华中科技大学 | Electromagnetic ultrasonic measuring device for wall thickness of steel tube based on magnetic focusing bridge circuit |
| CN105222732A (en) * | 2015-10-21 | 2016-01-06 | 湖北工业大学 | The electromagnetic ultrasonic thickness measuring probe that a kind of rotation controlled magnetic force can break |
| CN105606713A (en) * | 2016-03-01 | 2016-05-25 | 武汉中科创新技术股份有限公司 | Electromagnetic ultrasonic detection probe for zirconium pipe rod |
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| CN107421474A (en) | 2017-12-01 |
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