CN111830125B - Orthogonal excitation-receiving eddy current detection probe and hot isobaric welding debonding defect detection method - Google Patents

Orthogonal excitation-receiving eddy current detection probe and hot isobaric welding debonding defect detection method Download PDF

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CN111830125B
CN111830125B CN202010778874.5A CN202010778874A CN111830125B CN 111830125 B CN111830125 B CN 111830125B CN 202010778874 A CN202010778874 A CN 202010778874A CN 111830125 B CN111830125 B CN 111830125B
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square
defect
flow channel
scanning
welding
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CN111830125A (en
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李勇
张超
刘正帅
陈振茂
任淑廷
闫贝
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Xian Jiaotong University
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Xian Jiaotong University
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    • 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
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21B—FUSION REACTORS
    • G21B1/00—Thermonuclear fusion reactors
    • G21B1/11—Details
    • G21B1/13—First wall; Blanket; Divertor
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21B—FUSION REACTORS
    • G21B1/00—Thermonuclear fusion reactors
    • G21B1/25—Maintenance, e.g. repair or remote inspection
    • 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
    • Y02E30/10—Nuclear fusion reactors

Abstract

The invention discloses an orthogonal excitation-receiving eddy current detection probe and a hot isobaric welding debonding defect detection method. The axes of the square excitation coil and the square detection coil are positioned on one side of the U-shaped framework, the other two square detection coils are arranged on the other side of the U-shaped framework in the same mode, the four square coils are arranged in a rectangular mode, parameters of the four square coils are consistent, and the magnetic field excitation and signal detection functions are achieved. After the square exciting coil is electrified with exciting current, the induced voltage picked up by each of the three square detecting coils is used as an output signal. The invention also provides a detection method of the probe, which can be used for quickly and accurately detecting the debonding defect of the hot isobaric welding of the first wall surface plate cooling flow channel of the cladding of the vacuum chamber of the fusion reactor and has important engineering application value.

Description

Orthogonal excitation-receiving eddy current detection probe and hot isobaric welding debonding defect detection method
Technical Field
The invention belongs to the technical field of nondestructive testing, and particularly relates to an orthogonal excitation-receiving eddy current testing probe and a fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defect testing method.
Background
The nuclear fusion energy is one of the most potential clean energy sources in the future, a large amount of pollutants cannot be discharged into the environment such as the atmosphere and the like when the nuclear fusion energy is used for generating electricity, the greenhouse effect cannot be aggravated, and meanwhile, the nuclear fuel has the energy density far higher than that of fossil fuel, has great convenience in the aspects of transportation and storage, and has great potential application prospect.
The fusion reactor is a core component for generating electricity by utilizing fusion nuclear energy, and the first wall of the cladding of the vacuum chamber is used as an important reactor inner component of the fusion reactor, so that the fusion reactor is continuously cooled, radiation leakage is prevented, and an important supporting effect is played for the stable work of the fusion reactor. The first wall surface plate of the vacuum chamber cladding comprises a plurality of cooling flow channels, the preparation of the first wall surface plate adopts a hot isostatic pressing welding technology, the quality of a reliable welding interface needs to be ensured in the preparation process, and particularly, the hot isostatic pressing welding debonding defect needs to be effectively detected and quantitatively evaluated, so that the nondestructive quantitative detection of the hot isostatic pressing welding debonding defect of the first wall surface plate cooling flow channels of the fusion reactor vacuum chamber cladding is very important. At present, few researches are conducted on a vortex detection probe and a detection method for the fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defect, and the vortex detection probe and the detection method capable of achieving fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defect positioning and quantitative evaluation are not available.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an orthogonal excitation-receiving eddy current detection probe and a hot isobaric welding debonding defect detection method, which can be used for quickly, accurately positioning and accurately quantifying the hot isobaric welding debonding defect of a first wall surface plate cooling flow channel of a cladding of a vacuum chamber of a fusion reactor and have important engineering application value.
In order to achieve the purpose, the invention adopts the following technical scheme:
a quadrature excitation-reception eddy current inspection probe, comprising: the fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defect detection device can detect fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defects, and comprises a U-shaped probe support and two square coils fixed on two side edges of the U-shaped probe support, wherein the four square coils are arranged in a rectangular mode, parameters of the four square coils are consistent, the four square coils have magnetic field excitation and signal detection functions and can be interchanged at will; during detection, one square coil is used as a square excitation coil, and the other three square coils are used as three square detection coils; during detection, two sides of the orthogonal excitation-receiving eddy current detection probe are simultaneously placed in a cooling flow channel of a first wall surface plate of a cladding of a vacuum chamber of a fusion reactor with the same size as the outer boundary of a coil to detect the hot isobaric welding debonding defect of the flow channel.
The four square coils are formed by winding copper core enameled wires with the same diameter, and the U-shaped probe bracket is made of resin.
The square exciting coil excites a magnetic field under the condition of power-on driving, eddy currents induced by the magnetic field in a cladding first wall surface plate cooling flow channel of a vacuum chamber of the fusion reactor are distributed on the surface of the cladding first wall surface plate cooling flow channel, induced eddy currents are distributed along the circumferential direction of the pipe wall of the flow channel, and the main direction of the magnetic field is axially parallel to the cooling flow channel; the square detection coil is characterized in that an induced voltage signal output by the square detection coil is a detection signal, the direction of a square detection coil picking magnetic field on the same side of the U-shaped probe support with the square excitation coil is consistent with the direction of an excitation magnetic field, the direction of the square detection coil picking magnetic field parallel to the square excitation coil on the other side of the U-shaped probe support is parallel to the direction of the excitation magnetic field, and the direction of the square detection coil picking magnetic field arranged on the other side of the U-shaped probe support and in diagonal arrangement with the square excitation coil forms a preset angle with the direction of the excitation magnetic field.
The orthogonal excitation-receiving eddy current detection probe is used for detecting the hot isobaric welding debonding defect, the establishment of the eddy current signal scanning curve of the first wall surface plate cooling flow channel of the fusion reactor vacuum chamber cladding, the positioning and the evaluation of the hot isobaric welding debonding defect of the first wall surface plate cooling flow channel of the fusion reactor vacuum chamber cladding are carried out;
(1) the method for establishing the vortex signal scanning curve of the first wall surface plate cooling channel of the cladding of the vacuum chamber of the fusion reactor comprises the following specific steps:
the orthogonal excitation-receiving eddy current detection probe is placed in a fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel with the same size as the outer boundary of a coil, the initial position of the orthogonal excitation-receiving eddy current detection probe is the axial scanning coordinate origin in the flow channel, and the probe does not rotate circumferentially when being scanned axially in the flow channel; firstly, a defect-free standard test piece is detected, a signal generator and a power amplifier generate sine wave signals, a square exciting coil works, and simultaneously, a computer collects defect-free induction voltage signals of three square detecting coils through a data acquisition card to be R respectively2、R3、R4A defect-free induced voltage signal R obtained under the defect-free test piece2、R3、R4As a reference signal; then the axial scanning is carried out on the tested piece, and the tested piece is scanned at any position lxThe induced voltage signals of three square detection coils are respectively V2lx、V3lx、V4lxThe induced voltage signal is subtracted from the reference signal to obtain induced voltage differential signals of three square detection coils, which are respectively delta V2lx、△V3lx、△V4lxExtracting induced voltage differential signals delta V of three square detection coils2lx、△V3lx、△V4lxPeak value P of2lx、P3lx、P4lxAs a signal characteristic, an arbitrary position l is derived therefromxSignal characteristic P of three square detection coils2lx、P3lx、P4lxScanning curve P associated with the scanning position thereof2l、P3l、P4l；
(2) The fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defect positioning method comprises the following specific steps:
extracting a scanning curve P2l、P3l、P4l scanning position l when peak value appearsy2，ly3，ly4The axial position of the defect is ly2，ly3，ly4；
(3) The fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isostatic pressure welding debonding defect assessment method specifically comprises the following steps:
in n fusion reactor vacuum chamber cladding first wall surface plate cooling flow channels A with same geometric parameters1、A2、A3、……，AnThe volume of the respectively processed defect of the hot isostatic pressure welding interface is T1、T2、T3、……，TnAverage depth of defect is H1、H2、H3、……，HnIs short ofThe axial scanning of the orthogonal excitation-receiving eddy current detection probe is carried out to respectively obtain scanning curves P2la1、P2la2、P2la3、……，P2lanAnd P3la1、P3la2、P3la3、……，P3lanAnd P4la1、P4la2、P4la3、……，P4lan(ii) a The peak values of the scanning curves are respectively M2l1、M2l2、M2l3、……，M2lnAnd M3l1、M3l2、M3l3、……，M3lnAnd M4l1、M4l2、M4l3、……，M4ln(ii) a Taking the value of each point on the scanning curve as a vertical coordinate, the scanning position as a horizontal coordinate, the scanning starting point position as an origin, and the area of the area enclosed by the scanning starting point position is S2la1、S2la2、S2la3、……，S2lanAnd S3la1、S3la2、S3la3、……，S3lanAnd S4la1、S4la2、S4la3、……，S4lan(ii) a With H1、H2、H3、……，HnAs the abscissa, M2l1、M2l2、M2l3、……，M2lnAnd M3l1、M3l2、M3l3、……，M3lnAnd M4l1、M4l2、M4l3、……，M4lnRespectively as a vertical coordinate to obtain a correlation curve of the average depth of the debonding defect of the hot isostatic pressing welding and the peak value of the scanning curve, and performing linear fitting on the correlation curve to obtain a fitting formula M2＝a2H+b2And M3＝a3H+b3And M4＝a4H+b4Wherein a is2、a3、a4，b2、b3、b4Are all constants; by T1、T2、T3、……，TnAs the abscissa, S2la1、S2la2、S2la3、……，S2lanAnd S3la1、S3la2、S3la3、……，S3lanAnd S4la1、S4la2、S4la3、……，S4lanRespectively as a vertical coordinate to obtain a correlation curve of the volume of the hot isostatic pressing welding debonding defect, a scanning curve and a scanning position forming region area, and performing linear fitting on the curve to obtain a fitting formula S2＝c2T+d2And S3＝c3T+d3And S4＝c4T+d4Wherein c is2、c3、c4，d2、d3、d4Are all constants; for a fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel with unknown thermal isobaric welding debonding defect geometric dimension, an inversion formula H (M) of the average depth of the defect is respectively obtained by inverting a peak value fitting curve and an area fitting curve2-b2)/a2、H＝(M3-b3)/a3、H＝(M4-b4)/a4The inverse of the defect volume is given by the formula T ═ S2-d2)/c2、T＝(S3-d3)/c3、T＝(S4-d4)/c4(ii) a According to the obtained scanning curve P2l、P3l、P4M of l2lx、M3lx、M4lxAnd S2lx、S3lx、S4lxThe average depth of the defects and the defect volume are respectively substituted into a defect average depth inversion formula and a defect volume inversion formula, and the positions of all square detection coils can be obtained through calculationAverage depth and volume of hot isostatic welding debonding defects at the site.
Compared with the prior art, the invention has the following advantages:
1. the probe adopts one square excitation coil and three square detection coils, the shape of the coil is consistent with the square section of the cooling flow channel of the first wall surface plate of the cladding of the vacuum chamber of the fusion reactor, and the configuration of interchanging the positions of the square excitation coil and any one square detection coil is supported, so that the probe is flexible in arrangement, can carry out multiple detections on the cooling flow channel, and greatly improves the detection accuracy.
2. The probe can simultaneously pick up magnetic field detection signals which are parallel to, vertical to and form a preset angle with the direction of an excitation magnetic field for the inner wall of the same flow channel and the adjacent flow channel of the first wall surface plate of the cladding of the vacuum chamber of the fusion reactor in one axial scanning, thereby effectively improving the defect detection rate and the detection reliability and greatly improving the defect detection efficiency.
3. Compared with the conventional eddy current detection technology, the detection method can obtain detection signals of three positions by one-time excitation, when a detected metal component is not damaged, the output detection signal is zero, and when a detected flow channel has a hot isobaric welding debonding defect, the square detection coil can output a detection signal with an obvious amplitude, so that the detection rate of the hot isobaric welding debonding defect can be effectively improved.
Drawings
FIG. 1 is a schematic view of the probe of the present invention.
FIG. 2 is a block diagram of an experimental system.
Fig. 3 is a schematic diagram of the operation of the probe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, 2 and 3, the present embodiment is a quadrature excitation-reception eddy current inspection probe, which includes a "U" -shaped probe holder 1, a square excitation coil 2 fixed on the "U" -shaped probe holder, and a first square detection coil 3, a second square detection coil 4 and a third square detection coil 5.
The axes of the square excitation coil 2 and the first square detection coil 3 are both positioned at one side of the U-shaped probe bracket 1, the second square detection coil 4 and the third square detection coil 5 are positioned at the other side of the U-shaped probe bracket in the same way, and the four square coils form a rectangular arrangement. The square excitation coil 2, the first square detection coil 3, the second square detection coil 4 and the third square detection coil 5 are all formed by winding copper core enameled wires with the same diameter; during detection, two groups of coils of the orthogonal excitation-receiving eddy current detection probe are simultaneously placed in the cooling flow channel of the first wall surface plate of the cladding of the vacuum chamber of two adjacent fusion reactors with the same size as the outer boundary of the cross section of the coils to detect the hot isostatic pressure welding debonding defect of the flow channel.
The square exciting coil excites a magnetic field under the condition of power-on driving, eddy currents induced by the magnetic field in a cladding first wall surface plate cooling flow channel of a vacuum chamber of the fusion reactor are distributed on the surface of the cladding first wall surface plate cooling flow channel, induced eddy currents are distributed along the circumferential direction of the pipe wall of the flow channel, and the main direction of the magnetic field is axially parallel to the cooling flow channel; the square detection coil is characterized in that an induced voltage signal output by the square detection coil is a detection signal, the direction of a square detection coil picking magnetic field on the same side of the U-shaped probe support with the square excitation coil is consistent with the direction of an excitation magnetic field, the direction of the square detection coil picking magnetic field parallel to the square excitation coil on the other side of the U-shaped probe support is parallel to the direction of the excitation magnetic field, and the direction of the square detection coil picking magnetic field arranged on the other side of the U-shaped probe support and in diagonal arrangement with the square excitation coil forms a preset angle with the direction of the excitation magnetic field.
As a preferred embodiment of the invention, the four square coils are all formed by winding copper core enameled wires with the same diameter, and the material of the U-shaped probe bracket is resin.
The orthogonal excitation-receiving eddy current detection probe is used for detecting the hot isobaric welding debonding defect, the establishment of the eddy current signal scanning curve of the first wall surface plate cooling flow channel of the fusion reactor vacuum chamber cladding, the positioning and the evaluation of the hot isobaric welding debonding defect of the first wall surface plate cooling flow channel of the fusion reactor vacuum chamber cladding are carried out;
(1) the method for establishing the vortex signal scanning curve of the first wall surface plate cooling channel of the cladding of the vacuum chamber of the fusion reactor comprises the following specific steps:
as shown in fig. 2, a signal generator, a power amplifier, the orthogonal excitation-reception eddy current detection probe, a multiplexer, a filter amplifier, a data acquisition card and a computer are connected in sequence, as shown in fig. 3, the orthogonal excitation-reception eddy current detection probe is placed in a fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel with the inner diameter being the same as the size of the coil outer boundary, the initial position of the detection probe is the axial scanning origin of coordinates in the flow channel, and the orthogonal excitation-reception eddy current detection probe does not rotate circumferentially when being scanned axially in the flow channel; firstly, a defect-free standard test piece is detected, a signal generator and a power amplifier generate sine wave signals, a square exciting coil 2 works, and meanwhile, a computer collects induction voltage signals R of a first square detection coil 3, a second square detection coil 4 and a third square detection coil 5 through a data acquisition card2、R3、R4Respectively taking the induced voltage signals obtained under the defect-free test piece as R2、R3、R4As a reference signal; then the axial scanning is carried out on the tested piece, and the tested piece is scanned at any position lxThe induced voltage signals of the first square detection coil 3, the second square detection coil 4 and the third square detection coil 5 are respectively obtained as V2lx、V3lx、V4lxThe difference between the induced voltage signal and the reference signal is used to obtain induced voltage difference signals of the first square detection coil 3, the second square detection coil 4 and the third square detection coil 5, which are respectively delta V2lx、△V3lx、△V4lxExtracting induced voltage difference signals DeltaV of the first square detection coil 3, the second square detection coil 4 and the third square detection coil 52lx、△V3lx、△V4lxPeak value P of2lx、P3lx、P4lxAs a signal characteristic, an arbitrary position l can be derived therefromxSignal characteristics P of the first square detection coil 3, the second square detection coil 4 and the third square detection coil 52lx、P3lx、P4lxScanning curve P associated with the scanning position thereof2l、P3l、P4l；
(2) The fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defect positioning method comprises the following specific steps:
extracting a scanning curve P2l、P3l、P4l scanning position l when peak value appearsy2，ly3，ly4The axial position of the defect is ly2，ly3，ly4；
(3) The fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isostatic pressure welding debonding defect assessment method specifically comprises the following steps:
in n fusion reactor vacuum chamber cladding first wall surface plate cooling flow channels A with same geometric parameters1、A2、A3、……，AnThe volume of the respectively processed defect of the hot isostatic pressure welding interface is T1、T2、T3、……，TnAverage depth of defect is H1、H2、H3、……，HnRespectively obtaining a scanning curve P by scanning the axial direction of the orthogonal excitation-receiving eddy current detection probe2la1、P2la2、P2la3、……，P2lanAnd P3la1、P3la2、P3la3、……，P3lanAnd P4la1、P4la2、P4la3、……，P4lan. The peak values of the scanning curves are respectively M2l1、M2l2、M2l3、……，M2lnAnd M3l1、M3l2、M3l3、……，M3lnAnd M4l1、M4l2、M4l3、……，M4ln(ii) a Scanning position by using the value of each point on the scanning curve as vertical coordinateSet as a horizontal coordinate, a scanning starting point position is set as an origin, and the area of a region enclosed by the scanning starting point position is S2la1、S2la2、S2la3、……，S2lanAnd S3la1、S3la2、S3la3、……，S3lanAnd S4la1、S4la2、S4la3、……，S4lan(ii) a With H1、H2、H3、……，HnAs the abscissa, M2l1、M2l2、M2l3、……，M2lnAnd M3l1、M3l2、M3l3、……，M3lnAnd M4l1、M4l2、M4l3、……，M4lnRespectively as a vertical coordinate to obtain a correlation curve of the average depth of the debonding defect of the hot isostatic pressing welding and the peak value of the scanning curve, and performing linear fitting on the correlation curve to obtain a fitting formula M2＝a2H+b2And M3＝a3H+b3And M4＝a4H+b4Wherein a is2、a3、a4，b2、b3、b4Are all constants; by T1、T2、T3、……，TnAs the abscissa, S2la1、S2la2、S2la3、……，S2lanAnd S3la1、S3la2、S3la3、……，S3lanAnd S4la1、S4la2、S4la3、……，S4lanRespectively as a vertical coordinate to obtain a correlation curve of the volume of the hot isostatic pressing welding debonding defect, a scanning curve and a scanning position forming region area, and performing linear fitting on the curve to obtain a fitting formula S2＝c2T+d2And S3＝c3T+d3And S4＝c4T+d4Wherein c is2、c3、c4，d2、d3、d4Are all constants; for a fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel with unknown thermal isobaric welding debonding defect geometric dimension, an inversion formula H (M) of the average depth of the defect can be respectively obtained by inverting a peak value fitting curve and an area fitting curve2-b2)/a2、H＝(M3-b3)/a3、H＝(M4-b4)/a4The inverse of the defect volume is given by the formula T ═ S2-d2)/c2、T＝(S3-d3)/c3、T＝(S4-d4)/c4. According to the obtained scanning curve P2l、P3l、P4M of l2lx、M3lx、M4lxAnd S2lx、S3lx、S4lxAnd the average depth and the average volume of the hot isostatic pressing welding debonding defects at the positions of the square detection coils can be calculated by respectively substituting the average depth inversion formula and the defect volume inversion formula into the defect average depth inversion formula and the defect volume inversion formula.

Claims (4)

1. A quadrature excitation-reception eddy current inspection probe, characterized by: the fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defect detection device can detect fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defects, and comprises a U-shaped probe support and two square coils fixed on two side edges of the U-shaped probe support, wherein the four square coils are arranged in a rectangular mode, parameters of the four square coils are consistent, the four square coils have magnetic field excitation and signal detection functions and can be interchanged at will; during detection, one square coil is used as a square excitation coil, and the other three square coils are used as three square detection coils; during detection, two groups of coils of the orthogonal excitation-receiving eddy current detection probe are simultaneously placed in the cooling flow channel of the first wall surface plate of the cladding of the vacuum chamber of two adjacent fusion reactors with the same size as the outer boundary of the cross section of the coils to detect the hot isostatic pressure welding debonding defect of the flow channel.
2. The orthogonal excitation-reception eddy current inspection probe according to claim 1, wherein: the four square coils are formed by winding copper core enameled wires with the same diameter, and the U-shaped probe bracket is made of resin.
3. The orthogonal excitation-reception eddy current inspection probe according to claim 1, wherein: the square exciting coil excites a magnetic field under the condition of power-on driving, eddy currents induced by the magnetic field in a cladding first wall surface plate cooling flow channel of a vacuum chamber of the fusion reactor are distributed on the surface of the cladding first wall surface plate cooling flow channel, induced eddy currents are distributed along the circumferential direction of the pipe wall of the flow channel, and the main direction of the magnetic field is axially parallel to the cooling flow channel; the square detection coil is characterized in that an induced voltage signal output by the square detection coil is a detection signal, the direction of a square detection coil picking magnetic field on the same side of the U-shaped probe support with the square excitation coil is consistent with the direction of an excitation magnetic field, the direction of the square detection coil picking magnetic field parallel to the square excitation coil on the other side of the U-shaped probe support is parallel to the direction of the excitation magnetic field, and the direction of the square detection coil picking magnetic field arranged on the other side of the U-shaped probe support and in diagonal arrangement with the square excitation coil forms a preset angle with the direction of the excitation magnetic field.
4. The method for detecting the debonding defect of the hot isostatic pressing welding by using the orthogonal excitation-receiving eddy current inspection probe as set forth in any one of claims 1 to 3, wherein: establishing a vortex signal scanning curve of a first wall surface plate cooling flow channel of a cladding of a vacuum chamber of the fusion reactor, and positioning and evaluating the hot isostatic pressing welding debonding defect of the first wall surface plate cooling flow channel of the cladding of the vacuum chamber of the fusion reactor;
(1) the method for establishing the vortex signal scanning curve of the first wall surface plate cooling channel of the cladding of the vacuum chamber of the fusion reactor comprises the following specific steps:
sequentially connecting a signal generator, a power amplifier, the orthogonal excitation-receiving eddy current detection probe, a multiplexer, a filter amplifier, a data acquisition card and a computer, and placing the orthogonal excitation-receiving eddy current detection probe on a size and lineIn a cooling flow channel of a first wall surface plate of a cladding of a vacuum chamber of a fusion reactor with the same size of the outer boundary, the initial position of an orthogonal excitation-receiving eddy current detection probe is the origin of coordinates of axial scanning in the flow channel, and the probe does not rotate circumferentially when the probe is axially scanned in the flow channel; firstly, a defect-free standard test piece is detected, a signal generator and a power amplifier generate sine wave signals, a square exciting coil works, and simultaneously, a computer collects defect-free induction voltage signals of three square detecting coils through a data acquisition card to be R respectively2、R3、R4A defect-free induced voltage signal R obtained under the defect-free test piece2、R3、R4As a reference signal; then the axial scanning is carried out on the tested piece, and the tested piece is scanned at any position lxThe induced voltage signals of three square detection coils are respectively V2lx、V3lx、V4lxThe induced voltage signal is subtracted from the reference signal to obtain induced voltage differential signals of three square detection coils, which are respectively delta V2lx、△V3lx、△V4lxExtracting induced voltage differential signals delta V of three square detection coils2lx、△V3lx、△V4lxPeak value P of2lx、P3lx、P4lxAs a signal characteristic, an arbitrary position l is derived therefromxSignal characteristic P of three square detection coils2lx、P3lx、P4lxScanning curve P associated with the scanning position thereof2l、P3l、P4l；
(2) The fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isobaric welding debonding defect positioning method comprises the following specific steps:
extracting a scanning curve P2l、P3l、P4l scanning position l when peak value appearsy2，ly3，ly4The axial position of the defect is ly2，ly3，ly4；
(3) The fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel hot isostatic pressure welding debonding defect assessment method specifically comprises the following steps:
in n fusion reactor vacuum chamber cladding first wall surface plate cooling flow channels A with same geometric parameters1、A2、A3、……，AnThe volume of the respectively processed defect of the hot isostatic pressure welding interface is T1、T2、T3、……，TnAverage depth of defect is H1、H2、H3、……，HnRespectively obtaining a scanning curve P by scanning the axial direction of the orthogonal excitation-receiving eddy current detection probe2la1、P2la2、P2la3、……，P2lanAnd P3la1、P3la2、P3la3、……，P3lanAnd P4la1、P4la2、P4la3、……，P4lan(ii) a The peak values of the scanning curves are respectively M2l1、M2l2、M2l3、……，M2lnAnd M3l1、M3l2、M3l3、……，M3lnAnd M4l1、M4l2、M4l3、……，M4ln(ii) a Taking the value of each point on the scanning curve as a vertical coordinate, the scanning position as a horizontal coordinate, the scanning starting point position as an origin, and the area of the area enclosed by the scanning starting point position is S2la1、S2la2、S2la3、……，S2lanAnd S3la1、S3la2、S3la3、……，S3lanAnd S4la1、S4la2、S4la3、……，S4lan(ii) a With H1、H2、H3、……，HnAs abscissa, M2l1、M2l2、M2l3、……，M2lnAnd M3l1、M3l2、M3l3、……，M3lnAnd M4l1、M4l2、M4l3、……，M4lnRespectively as a vertical coordinate to obtain a correlation curve of the average depth of the thermal isobaric welding debonding defects and the peak value of the scanning curve, and performing linear fitting on the correlation curve of the average depth of the thermal isobaric welding debonding defects and the peak value of the scanning curve to obtain a fitting formula M2＝a2H+b2And M3＝a3H+b3And M4＝a4H+b4Wherein a is2、a3、a4，b2、b3、b4Are all constants; by T1、T2、T3、……，TnAs the abscissa, S2la1、S2la2、S2la3、……，S2lanAnd S3la1、S3la2、S3la3、……，S3lanAnd S4la1、S4la2、S4la3、……，S4lanRespectively as a vertical coordinate to obtain a correlation curve of the volume of the thermal isobaric welding debonding defect and the area of the region formed by the scanning curve and the scanning position, and linearly fitting the correlation curve of the volume of the thermal isobaric welding debonding defect and the area of the region formed by the scanning curve and the scanning position to obtain a fitting formula S2＝c2T+d2And S3＝c3T+d3And S4＝c4T+d4Wherein c is2、c3、c4，d2、d3、d4Are all constants; for a fusion reactor vacuum chamber cladding first wall surface plate cooling flow channel with unknown thermal isobaric welding debonding defect geometric dimension, an inversion formula H (M) of the average depth of the defect is respectively obtained by inverting a peak value fitting curve and an area fitting curve2-b2)/a2、H＝(M3-b3)/a3、H＝(M4-b4)/a4The inverse of the defect volume is given by the formula T ═ S2-d2)/c2、T＝(S3-d3)/c3、T＝(S4-d4)/c4(ii) a According to the obtained scanning curve P2l、P3l、P4l M of2lx、M3lx、M4lxAnd S2lx、S3lx、S4lxAnd the average depth and the average volume of the hot isostatic pressing welding debonding defects at the positions of the square detection coils can be calculated by respectively substituting the average depth inversion formula and the defect volume inversion formula into the defect average depth inversion formula and the defect volume inversion formula.
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