WO2015016742A1 - Магнитная измерительная система для дефектоскопа с продольным намагничиванием - Google Patents
Магнитная измерительная система для дефектоскопа с продольным намагничиванием Download PDFInfo
- Publication number
- WO2015016742A1 WO2015016742A1 PCT/RU2014/000226 RU2014000226W WO2015016742A1 WO 2015016742 A1 WO2015016742 A1 WO 2015016742A1 RU 2014000226 W RU2014000226 W RU 2014000226W WO 2015016742 A1 WO2015016742 A1 WO 2015016742A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic
- flaw detector
- combined
- sensors
- inductance
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/03—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another
- F17D3/08—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another the different products being separated by "go-devils", e.g. spheres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
Definitions
- the claimed utility model relates to the field of magnetic flaw detection, to devices for non-destructive testing of pipelines and relates to a magnetic measuring system of an in-line flaw detector.
- the closest prototype of the claimed utility model is a ROSEN magnetic flaw detector, described by Markus ⁇ rors & Thomas Beuker in the presentation “Combined in-Line Inspection in the Context of Pipeline Integrity” 22-September-2011, in which the distortion of the geometry of the inner wall of the pipe and determining whether the defect belongs to the inner wall of the pipe is made by two rings with sensor blocks, each of which is located on a separate section, connected using a cardan joint.
- the operation of the sensor is based on the principle of exciting eddy currents in the pipe wall. Distortions of the geometry of the inner wall and internal defects lead to a change in the distribution of eddy currents, which is recorded by the receiving coil.
- the technical result consists in reducing the error in measuring the geometry of defects, increasing the reliability of the flaw detector through pipes with complex geometry by reducing the number of sections and placing the magnetic measuring system on one section.
- the magnetic measuring system for a flaw detector with longitudinal magnetization based on combined sensor blocks consists of combined sensor blocks that are installed on the magnetic circuit of a single-section flaw detector using a ring of movable brackets between two rings of magnets of opposite polarity and elements that transmit magnetic flux to the inner wall of the pipeline.
- One sensor unit combined magnetic measuring system for a flaw detector with longitudinal magnetization based on combined sensor units allows you to identify defects in the scattering field that occurs at their location, to determine whether the defect belongs to the internal wall of the pipeline, to indicate distortions in the geometry of the internal wall of the pipeline associated with dents, by transverse seams, etc.
- One block of combined sensors consists of eddy current sensors, Hall sensors measuring the transverse component of magnetic field induction, and Hall sensors measuring the longitudinal component of magnetic field induction.
- the eddy current sensor consists of two inductors integrated in a module and arranged coaxially, one above the other. Inductors are elements of a bridge that is connected to a high-frequency generator. In pair, one of the inductors is a reference, as it is placed in a shielded compartment, isolated from the external environment by electromagnetic current.
- the inductance of the inductor changes, which leads to an imbalance in the bridge and the appearance of a signal at the differential output amplifier.
- the change in inductance is associated with the occurrence of eddy currents on the inner surface of the pipeline, which change the electromagnetic flux through the inductor, not isolated from the external environment.
- the inductance of an uninsulated inductor is compared with the reference inductance, and thus a defect is determined.
- the voltage from the bridge is supplied to the phase detectors, from the detectors to the differential amplifier.
- the working frequency of the eddy current sensor is chosen large enough so that the thickness of the skin layer for steel is only a few microns, which is significantly less than the depth of the minimum defect; and to minimize interference from external defects, an additional phase voltage shift of 30-40 ° from the inductors of the eddy current sensor is introduced, which is achieved by adjusting the resonance of the serial circuits of the bridge L1C1 and L2C2 below the generator excitation frequency.
- the interference from the external defect and the useful signal acquire different signs of deviation, which is easily taken into account when processing the threshold method; and the use of the L2 reference inductor made it possible to significantly reduce the impact of the external environment: temperature and pressure.
- holes closed by ceramic inserts are introduced in the protective non-ferromagnetic plate of the combined sensor block.
- two more eddy current sensors of combined sensor blocks were built. The signals of the Hall sensors measuring the transverse component of the magnetic field induction and the Hall sensors measuring the longitudinal component of the magnetic field are sequentially switched to the analog-to-digital converter, and signals from different eddy current sensors are received using the multiplexer.
- the parallel digital signal is converted into a serial digital signal.
- a serial digital signal is fed to the multiplexer unit, which combines digital streams with a group of combined sensor blocks. Then, from the units of the multiplexers, the digital signal enters the on-board equipment unit, where it is recorded on a digital medium.
- Combined eddy-current sensors are located in the region of a strong magnetic field of the magnetic system (more than 6 kA / m), which provides magnetization of the pipe section between two rings of magnets of opposite polarity and elements that transmit magnetic flux to the pipe’s inner wall to a state of technical saturation. Under these conditions, eddy current sensors designed to detect only internal defects become sensitive to external defects. The fact is that external defects can create a significant scattering field in the inner region of the pipe, which modulates the thickness of the skin layer, "where eddy currents exist:
- ⁇ - ⁇ / ⁇ ⁇ ⁇ ⁇ is the material conductivity
- f is the excitation frequency
- the working frequency of the eddy current sensor is selected above 10 MHz (KB range of radio waves).
- the calculations of the magnetic measuring system were carried out relatively to the scalar magnetic potential numerically, by the finite element method, using the ANSYS software package.
- the calculations and optimization of the eddy current sensor on the inductors L1 and L2 were also carried out using the ANSYS software package using the vector potential method for harmonic influence.
- the claimed magnetic measuring system for a flaw detector with longitudinal magnetization based on combined sensor blocks is installed on one section of the flaw detector, which reduces the consumption of materials and the cost of manufacturing a flaw detector.
- Combining sensors of a magnetic measuring system into combined sensor blocks and placing them on a ring of movable brackets mounted on the magnetic circuit eliminates measurement errors associated with the backlash of the cardan joint of the flaw detector sections.
- the use of the claimed magnetic measuring system for a flaw detector with longitudinal magnetization based on combined sensor blocks allows to reduce the dimensions, which in turn increases the reliability of the passage of the pipeline turns by the flaw detector.
- the inclusion in the bridge of the eddy current sensor of the reference inductor placed in a shielded compartment, isolated from the external environment by electromagnetic current, can significantly reduce the impact of the external environment: temperature and pressure.
- the implementation of inductors in printed design allows you to reduce the sensitivity of the eddy current sensor to the pressure of the working medium, which can reach 140 atm (14 MPa). All this enhances the quality of pipeline control by non-destructive methods using a flaw detector with a magnetic measuring system mounted on it for a flaw detector with longitudinal magnetization based on combined sensor blocks.
- Figure 1 shows the inventive magnetic measuring system for a flaw detector with longitudinal magnetization on the basis of combined sensor blocks mounted on one section of the flaw detector;
- FIG. 2 is a functional diagram explaining the operation of the combined sensor block
- Fig. 3 shows a view of the sensor block combined from the side of the pipe wall and a section along the radial plane of the pipe;
- FIG. 4 shows a module of inductance coils of an eddy current sensor of a sensor block combined in section.
- inductor L 1 3 - inductor L 1; 4 - a reference inductor L2, placed in a shielded compartment, isolated from the external environment by electromagnetic current;
- the sensors are triggered when the flaw detector passes through the pipeline.
- the claimed magnetic measuring system based on combined sensor blocks consists of a cylindrical magnetic circuit on which between two rings of magnets of opposite polarity there is a ring of movable brackets uniformly distributed along the circumference, with combined sensor blocks 1 mounted on them (Fig. 1).
- the magnetic flux from the magnets to the wall of the pipeline is transmitted using the elements 2 (Fig.1).
- One block of combined sensors consists of eddy current sensors, Hall sensors 11 (Figs. 2 and 3) measuring the transverse component of the magnetic field induction, and Hall sensors 12 (Figs. 2 and 3) measuring the longitudinal component of the magnetic field induction.
- the eddy current sensor consists of two inductors 3 and 4 (figure 2, 3 and 4), combined in module 16 (figure 4), located coaxially, one above the other.
- Inductors 3 and 4 are elements of a bridge that is connected to a high frequency generator 6 (figure 2).
- the voltage from the bridge is supplied to the phase detectors 5 (figure 2), from the detectors to the differential amplifier 7 (figure 2).
- Two more eddy current channels of combined sensor blocks were constructed in a similar way.
- the multiplexer 8 (figure 2), the signals from different eddy current sensors are sequentially fed to the analog-to-digital Converter 9 (figure 2).
- the signals of the Hall sensors 11 (FIG. 2), measuring the transverse component of the magnetic field induction, and the Hall sensors 12 (FIG. 2), which measure the longitudinal component of the magnetic field induction, are also sequentially switched to the analog-to-digital converter.
- the parallel digital code is converted into a serial converter 10 (figure 2).
- the digital signal via a cable is supplied to the multiplexer 8 (Fig.2), which combines digital streams from a group of combined sensor blocks. Then, from the multiplexer 8 (Fig. 2), the digital signal enters the on-board equipment unit, where it is recorded on a digital medium.
- the combined sensor block consists of a board 16 (Figs. 3 and 4), on which are placed the Hall sensor microcircuits 11 (Fig. 3) for measuring the transverse component, Hall sensors circuits 12 (Fig.
- FIG. 4 Another inductor 3 (Fig. 4) is not insulated and placed above the ceramic insert 2 (Fig. 4).
- the inductance of the non-insulated inductor 3 (FIGS. 3 and 4) is compared with the inductance of the reference coil 4 (FIGS. 3 and 4), and thus the defect 20 (FIG. 4) of the pipe 19 (FIG. 4) is determined.
- the module of the inductors is filled with compound 13 (Figs. 3 and 4).
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EA201591170A EA031338B1 (ru) | 2013-07-30 | 2014-03-31 | Магнитная измерительная система для дефектоскопа с продольным намагничиванием |
EP14832478.3A EP2927678B1 (en) | 2013-07-30 | 2014-03-31 | Magnetic measuring system for a flaw detector having longitudinal magnetization |
BR112015016852-3A BR112015016852B1 (pt) | 2013-07-30 | 2014-03-31 | sistema magnético de medição para um detector de falhas com magnetização longitudinal |
MX2015009010A MX346805B (es) | 2013-07-30 | 2014-03-31 | Sistema de medición magnética para un detector de defectos que tiene magnetización longitudinal. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2013135543 | 2013-07-30 | ||
RU2013135543 | 2013-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015016742A1 true WO2015016742A1 (ru) | 2015-02-05 |
Family
ID=52432149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2014/000226 WO2015016742A1 (ru) | 2013-07-30 | 2014-03-31 | Магнитная измерительная система для дефектоскопа с продольным намагничиванием |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2927678B1 (ru) |
BR (1) | BR112015016852B1 (ru) |
EA (1) | EA031338B1 (ru) |
MX (1) | MX346805B (ru) |
WO (1) | WO2015016742A1 (ru) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2587695C1 (ru) * | 2015-04-29 | 2016-06-20 | Открытое акционерное общество "Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") | Магнитный дефектоскоп для обнаружения дефектов в сварных швах |
CN111076029A (zh) * | 2019-12-31 | 2020-04-28 | 中国人民解放军92578部队 | 一种用于微小管路腐蚀涡流内检测装置 |
CN113503809A (zh) * | 2021-07-16 | 2021-10-15 | 中国特种设备检测研究院 | 基于磁化技术的管道变形内检测方法及装置 |
CN116068247A (zh) * | 2023-03-22 | 2023-05-05 | 国网江苏省电力有限公司常州供电分公司 | 罗氏线圈型电流传感器 |
Families Citing this family (3)
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CN105987285B (zh) * | 2016-06-22 | 2019-01-15 | 天津大学 | 一种管道异常点的快速检测方法 |
CN109681784A (zh) * | 2017-10-19 | 2019-04-26 | 中国石油天然气股份有限公司 | 管道中盗油支管的检测装置及检测方法 |
CN115014624B (zh) * | 2022-05-30 | 2024-02-20 | 沈阳工业大学 | 一种高精度三轴阵列式弱磁应力内检测探头 |
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EP0321013A2 (en) * | 1987-12-01 | 1989-06-21 | Shell Internationale Researchmaatschappij B.V. | A method and apparatus for internal corrosion-inspection of pipes or tubes of a relatively small diameter |
US5532587A (en) * | 1991-12-16 | 1996-07-02 | Vetco Pipeline Services, Inc. | Magnetic field analysis method and apparatus for determining stress characteristics in a pipeline |
GB2376077A (en) | 2000-12-26 | 2002-12-04 | Ngks Internat Corp | Pipeline inspection apparatus |
RU2334980C1 (ru) * | 2007-04-23 | 2008-09-27 | Закрытое акционерное общество "Газприборавтоматикасервис" | Внутритрубный снаряд-дефектоскоп с колесными одометрами |
RU2455625C1 (ru) * | 2011-02-01 | 2012-07-10 | Закрытое акционерное общество Научно-Производственный Центр "Молния" | Устройство для сплошного сканирующего контроля качества неповоротных цилиндрических деталей |
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-
2014
- 2014-03-31 BR BR112015016852-3A patent/BR112015016852B1/pt active IP Right Grant
- 2014-03-31 MX MX2015009010A patent/MX346805B/es active IP Right Grant
- 2014-03-31 EA EA201591170A patent/EA031338B1/ru not_active IP Right Cessation
- 2014-03-31 WO PCT/RU2014/000226 patent/WO2015016742A1/ru active Application Filing
- 2014-03-31 EP EP14832478.3A patent/EP2927678B1/en not_active Not-in-force
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EP0321013A2 (en) * | 1987-12-01 | 1989-06-21 | Shell Internationale Researchmaatschappij B.V. | A method and apparatus for internal corrosion-inspection of pipes or tubes of a relatively small diameter |
US5532587A (en) * | 1991-12-16 | 1996-07-02 | Vetco Pipeline Services, Inc. | Magnetic field analysis method and apparatus for determining stress characteristics in a pipeline |
GB2376077A (en) | 2000-12-26 | 2002-12-04 | Ngks Internat Corp | Pipeline inspection apparatus |
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MARKUS B RORS; THOMAS BEUKER, COMBINED IN-LINE INSPECTION IN THE CONTEXT OF PIPELINE INTEGRITY, 22 September 2011 (2011-09-22) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2587695C1 (ru) * | 2015-04-29 | 2016-06-20 | Открытое акционерное общество "Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") | Магнитный дефектоскоп для обнаружения дефектов в сварных швах |
CN111076029A (zh) * | 2019-12-31 | 2020-04-28 | 中国人民解放军92578部队 | 一种用于微小管路腐蚀涡流内检测装置 |
CN113503809A (zh) * | 2021-07-16 | 2021-10-15 | 中国特种设备检测研究院 | 基于磁化技术的管道变形内检测方法及装置 |
CN116068247A (zh) * | 2023-03-22 | 2023-05-05 | 国网江苏省电力有限公司常州供电分公司 | 罗氏线圈型电流传感器 |
Also Published As
Publication number | Publication date |
---|---|
MX2015009010A (es) | 2016-01-20 |
EA201591170A1 (ru) | 2016-06-30 |
BR112015016852B1 (pt) | 2021-01-19 |
EA031338B1 (ru) | 2018-12-28 |
EP2927678B1 (en) | 2018-02-21 |
EP2927678A1 (en) | 2015-10-07 |
EP2927678A4 (en) | 2016-05-25 |
MX346805B (es) | 2017-03-31 |
BR112015016852A2 (pt) | 2017-07-11 |
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