CN101419192B - Super strength magnetisation leakage detecting method and apparatus for magnetic conduction component - Google Patents

Abstract

The invention discloses a method and a device for detecting super-strong magnetized leakage of a conducting magnetic component. The method comprises the following steps: using a single feed-through magnetizing coil to locally, singly, axially and super-strongly magnetize the conducting magnetic component, exciting leakage field of longitudinal damage and transverse damage on the conducting magnetic component and picking up the leakage field by using a magnet-sensing element array, and achieving overall detection of the longitudinal damage and transverse damage; and distinguishing detected signals of the longitudinal damage and transverse damage through a signal summating comparison method and compensating the detected signals with signal amplitude, and achieving uniform judgment of the signal amplitude and the sensitivity of the longitudinal damage and transverse damage with equivalent damage. The device comprises the feed-through magnetizing coil, a magnet-sensing component, a signal identifying and compensating component and a data collecting card. The method simplifies and unifies the prior detection method to reduce cost, achieves simple straight-forward relative scanning motion between the magnet-sensing component and a detection unit to finish flaw detection effectively at high speed, can finish overall detection of the longitudinal damage and transverse damage of the magnet-sensing component which is difficult to rotate, and can adapt to detection of longitudinal damage on a longitudinal weld.

Description

Superpower magnetization flux-leakage detection method of conducting magnetic component and device

Technical field

The present invention relates to a kind of conducting magnetic component leakage field Dynamic Non-Destruction Measurement, be specifically related to superpower magnetization flux-leakage detection method of a kind of conducting magnetic component and device.

Background technology

Flux-leakage detection method extends out from the magnetic detection method.The initial mode of magnetization is a residaul field method, the magnetized state of conducting magnetic component to be detected very a little less than; Direct conventional magnetization method has subsequently been strengthened the magnetized state of conducting magnetic component to be detected; The demonstration that has strengthened defective is indicative, but exists defective trend the detecting property problem relevant with DOM: DOM as far as possible with defective move towards vertical can be well to be detected and observe out.So the comprehensive resultant magnetization flux-leakage detection method that can only adopt that moves towards to hinder is accomplished on the conducting magnetic component at present comprehensively; The relative scanning complicated movement of detection method; The pick-up unit complex structure, cost is high, and owing to the screw propulsion scanning campaign of low speed causes realizing high speed detection.In addition, can not adapt to the conducting magnetic component (like coiled tubing, steel band, drill with ferrule tool, rail etc.) that self is difficult to do spinning movement and go up the comprehensive complete detection of moving towards wound; Can not accomplish the detection of the wound that is parallel to the weld seam trend on the longitudinal seam.

In Magnetic Flux Leakage Inspecting, for " elongated " shape conducting magnetic components such as steel pipe, coiled tubing, steel band, drill with ferrule tool, rail, will be axially (or vertically) often, and be circumferential (or horizontal) perpendicular to this direction along the long dimensional directions of its profile.The easiest detection of conducting magnetic component axial magnetized and its axis angle are the wound (be called for short laterally and hinder) of 90 ° of trends; But also being used to detect with its axis angle is 45-90 ° the nearly laterally wound of trend, comprises that being 45-90 ° with the conducting magnetic component axis angle moves towards to hinder so in fact laterally hinder; Likewise, vertically hinder to comprise with the conducting magnetic component axis angle being the wound of 0-45 ° of trend.So the comprehensive detection of moving towards to hinder also is its horizontal stroke, vertical complete detection of hindering on the conducting magnetic component.

Summary of the invention

Task of the present invention provides the superpower magnetization flux-leakage detection method of a kind of conducting magnetic component, and this method is easy to realize that cost is lower, and applicability is strong; The present invention also provides the device of realizing this method.

The superpower magnetization flux-leakage detection method of conducting magnetic component provided by the invention, its step comprises:

The 1st goes on foot, conducting magnetic component to be detected is stretched in the feed-through coil, and it is carried out axial superpower magnetization, forms the superpower exciting field that vertical, horizontal is hindered leakage field;

The 2nd step, utilize the magnetosensitive detecting element to pick up vertical, horizontal injury leakage field, two magnetosensitive detecting elements are set at the axial direction of conducting magnetic component to be detected, at least two magnetosensitive detecting elements of circumferential direction setting, the take-off location point becomes array distribution;

The 3rd step, the magnetic field that the magnetosensitive detecting element is picked up are converted into voltage signal, if voltage has sudden change, this take-off location point of conducting magnetic component exists hinders, otherwise there is not wound in this take-off location point of conducting magnetic component;

The 4th step, conducting magnetic component to be detected through through mode magnetizing coil and magnetosensitive detecting element, repeat said process with the dead-beat relative motion, accomplish the complete detection that vertical, horizontal is hindered on the member body.

Because in above-mentioned detection; The vertical, horizontal of identical damage equivalent hinders that pairing to detect the voltage signal amplitude variant, and other is consistently judged for the vertical, horizontal hurt that reaches identical damage equivalent is hindered level, so in the 3rd goes on foot; Exist if confirm to hinder, then carry out following processing;

1., adopting signal summation and relative method to carry out the vertical, horizontal wounding signal distinguishes:

Utilize following formula (I) (II) to judge: when formula (I) was set up, this voltage signal was the detecting signal of horizontal wound 1, and when formula (II) was set up, this voltage signal was the detecting signal of vertical wound 2.

$\left.\begin{array}{c}{V}_{\mathrm{ij}}+V_{(i+1)j}={2V}_{\mathrm{ij}}={2V}_{(i+1)j}\\ V_{\mathrm{ij}}+V_{i(j+1)}=V_{\mathrm{ij}}=V_{i(j+1)}\end{array}\right\}---\left(I\right)$

$\left.\begin{array}{c}{V}_{\mathrm{ij}}+V_{i(j+1)}={2V}_{\mathrm{ij}}={2V}_{i(j+1)}\\ V_{\mathrm{ij}}+V_{(i+1)j}=V_{\mathrm{ij}}\end{array}\right\}---\left(\mathrm{II}\right)$

In the formula, i, j represent the sequence number of circumferential direction and axial direction magnetosensitive detecting element respectively;

2. vertical, horizontal is hindered detecting signal and compensates, vertical or horizontal wound is carried out signal amplitude amplify or dwindle, realize identical damage equivalent in length and breadth to hindering other consistent identification of level.

The superpower magnetization leakage magnetic detection device of conducting magnetic component provided by the invention comprises feed-through coil, the first magnetosensitive assembly, signal identification compensation assembly, data collecting card and magnetosensitive unit installing board; The first magnetosensitive assembly and feed-through coil connect as one through the magneto sensor installing plate; Signal identification compensation assembly is made up of totalizer, comparer, the series connection of first amplifier, and totalizer links to each other with the first magnetosensitive detection components; Data collecting card is made up of wave filter, second amplifier and A/D converter series connection; Wave filter links to each other with first amplifier.The first magnetosensitive assembly comprises into the magnetosensitive detecting element of array distribution, wherein, is provided with two magnetosensitive detecting elements at the axial direction of conducting magnetic component to be detected, is provided with at least two magnetosensitive detecting elements in circumferential direction.

The wound that the superpower magnetization flux-leakage detection method of conducting magnetic component provided by the invention is based on any trend on the conducting magnetic component all can be inspired this principle of leakage field when the magnetic pumping of single direction is enough strong.Under remanent magnetism magnetization method and conventional directly magnetization condition, the single magnetizing field that is produced can inspire perpendicular to the magnetizing field direction and move towards the leakage field of wound and be observed or detect; This DOM is moved towards to hinder because the leakage field that flux shunt fails to inspire is difficult to form the demonstration indication of wound and be observed out but this moment is for being parallel to; Conventional magnetizing field strength increased reach the superpower magnetizing field more than the field intensity 1T of center, inspire and be parallel to this superpower field and move towards the leakage field of hindering, and can be good at forming and show and indicate and be detected.Under the superpower magnetized state of single direction, can detect vertical, horizontal wound on the conducting magnetic component like this, form superpower flux-leakage detection method.

The characteristics of the superpower magnetization flux-leakage detection method of conducting magnetic component provided by the invention are: adopt the through mode magnetizing coil that conducting magnetic component is carried out axial superpower magnetization; Inspire the leakage field that vertical, horizontal is hindered on the conducting magnetic component and utilize the magneto sensor array to pick up, what vertical, horizontal was hindered on the realization conducting magnetic component detects; Carry out the identification that vertical, horizontal is hindered detecting signal through array element signal summation relative method then, and vertical, horizontal is hindered detecting signal compensate, realize with of the unified judgement of signal amplitude such as the vertical, horizontal wound of damage equivalent with sensitivity.

In a word, the inventive method is at first simplified traditional conducting magnetic component resultant magnetization flux-leakage detection method with unified, reduces cost; Realize the simple relative scanning campaign of dead-beat between conducting magnetic component and the detecting unit, accomplish the flaw detection of high-speed and high-efficiency ground; Simultaneously, can accomplish the complete detection of conducting magnetic component (like coiled tubing, steel band, drill with ferrule tool, rail etc.) the vertical, horizontal wound that self is difficult to rotate; Also can adapt to the detection of vertically hindering on the longitudinal seam.

Description of drawings

Fig. 1 .1 detects conventional magnetization Magnetic Flux Leakage Inspecting synoptic diagram in the principle for the present invention;

Fig. 1 .2 detects superpower magnetization Magnetic Flux Leakage Inspecting synoptic diagram in the principle for the present invention;

Fig. 2 .1 is a detection method synoptic diagram of the present invention;

Fig. 2 .2 hinders identification compensation principle synoptic diagram for detection method vertical, horizontal of the present invention;

Fig. 3 .1 is a pick-up unit general illustration of the present invention;

Fig. 3 .2 is magnetosensitive modular construction synoptic diagram in the pick-up unit 3.1 of the present invention;

The structural representation that Fig. 4 .1 detects to steel pipe for magnetosensitive assembly in the pick-up unit 3.1 of the present invention;

The structural representation that Fig. 4 .2 detects to square drilling tool for magnetosensitive assembly in the pick-up unit 3.1 of the present invention;

The structural representation that Fig. 4 .3 detects to steel band (plate) for magnetosensitive assembly in the pick-up unit 3.1 of the present invention;

The structural representation that Fig. 4 .4 detects to rail for magnetosensitive assembly in the pick-up unit 3.1 of the present invention;

Fig. 5 .1 detects N5 (section loss 5%100) when laterally hindering, the detecting signal V of magneto sensor 5a, 5b for the present invention ₁₁, V ₁₂And both V that sue for peace ₁₁+ V ₁₂Output waveform figure;

Fig. 5 .2 detects N5 (section loss 5%100) when laterally hindering, the detecting signal V of magneto sensor 5a, 5c for the present invention ₁₁, V ₂₁And both V that sue for peace ₁₁+ V ₂₁Output waveform figure;

Fig. 5 .3 detects N5 (section loss 5%100) when vertically hindering, the detecting signal V of magneto sensor 5a, 5b for the present invention ₁₁, V ₁₂And both V that sue for peace ₁₁+ V ₁₂Output waveform figure;

Fig. 5 .4 detects N5 (section loss 5%100) when vertically hindering, the detecting signal V of magneto sensor 5a, 5c for the present invention ₁₁, V ₂₁And both V that sue for peace ₁₁+ V ₂₁Output waveform figure;

Fig. 5 .5 detects the final detection output waveform figure of the vertical, horizontal wound of N5 (section loss 5%100) for the present invention;

Embodiment

Below in conjunction with accompanying drawing and instance the present invention is done further detailed explanation.

Like Fig. 1 .1, shown in 1.2, magnetize under method and the conventional directly magnetization condition at remanent magnetism, the single magnetizing field H1 that is produced can inspire perpendicular to the leakage field of the wound of magnetizing field H1 direction trend (promptly horizontal wound 1) and be observed or detect; But this moment is for the wound that is parallel to magnetizing field H1 direction trend (promptly vertically hindering 2): because the shunting of magnetic flux in conducting magnetic component causes the leakage field that is difficult to inspire, the demonstration that can not form wound is indicated and is observed out; Conventional magnetizing field H intensity is increased to H1 ', reach the superpower magnetizing field of center field intensity 1T, inspire the leakage field of vertical wound 2, and can be good at form showing indication and be detected.The vertical, horizontal that under the superpower magnetized state of single direction, can detect conducting magnetic component is like this hindered, and forms superpower flux-leakage detection method.

Like Fig. 2 .1, shown in 2.2, the superpower magnetization flux-leakage detection method of conducting magnetic component provided by the invention, its main implementation step is:

The 1st goes on foot, conducting magnetic component to be detected 4 is stretched in the feed-through coil 3, it is carried out axial superpower magnetization, and the axial magnetized field strength H1 at magnetizing coil center is reached more than the 1T, forms the superpower exciting field that vertical, horizontal is hindered leakage field;

The 2nd the step, utilize magnetosensitive assembly 5 to pick up vertical, horizontal injury leakage field, the take-off location point becomes arranged in arrays, the magnetic field intensity V that is picked up is designated as:

$\left|\begin{array}{cc}{V}_{11}& V_{12}\\ V_{21}& V_{22}\\ \&CenterDot;& \&CenterDot;\\ \&CenterDot;& \&CenterDot;\\ \&CenterDot;& \&CenterDot;\\ V_{n1}& V_{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="H2008102366017E00011.png,H2008102366017E00012.png"\; state="\{\{state\}\}">n</figure-callout>}2}\end{array}\right|$

Wherein, n representes the number of the circumferential direction magneto sensor of conducting magnetic component 4, and n is the positive integer more than or equal to 2.

The 3rd step, the magnetic field that magnetosensitive assembly 5 is picked up are converted into voltage signal, if voltage has sudden change, this location point of conducting magnetic component exists hinders, otherwise there is not wound in this location point of conducting magnetic component;

The 4th step, conducting magnetic component to be detected 4 through through mode magnetizing coil 3 and magnetosensitive assembly 5, repeat said process with the dead-beat relative motion, accomplish the complete detection that vertical, horizontal is hindered on the member body.

Because in above-mentioned detection; The vertical, horizontal of identical damage equivalent hinders that pairing to detect the voltage signal amplitude variant, and other is consistently judged for the vertical, horizontal hurt that reaches identical damage equivalent is hindered level, so in the 3rd goes on foot; Exist if confirm to hinder, then carry out following processing;

1., adopting signal summation and relative method to carry out the vertical, horizontal wounding signal distinguishes:

Utilize following formula (I) (II) to judge: when formula (I) was set up, this voltage signal was the detecting signal of horizontal wound 1, and when formula (II) was set up, this voltage signal was the detecting signal of vertical wound 2.

$\left.\begin{array}{c}{V}_{\mathrm{ij}}+V_{(i+1)j}={2V}_{\mathrm{ij}}={2V}_{(i+1)j}\\ V_{\mathrm{ij}}+V_{i(j+1)}=V_{\mathrm{ij}}=V_{i(j+1)}\end{array}\right\}---\left(I\right)$

$\left.\begin{array}{c}{V}_{\mathrm{ij}}+V_{i(j+1)}={2V}_{\mathrm{ij}}={2V}_{i(j+1)}\\ V_{\mathrm{ij}}+V_{(i+1)j}=V_{\mathrm{ij}}\end{array}\right\}---\left(\mathrm{II}\right)$

In the formula, i, j represent the sequence number of circumferential direction and axial direction magnetosensitive detecting element respectively;

2. vertical, horizontal being hindered detecting signal compensates:

When being when vertically hindering 2 detecting signal, carries out signal to it and amplify compensation, enlargement factor is 1.5, realize identical damage equivalent in length and breadth to hindering other consistent identification of level.

Perhaps, when being when laterally hindering 1 detecting signal, carries out signal to it and dwindle compensation, minification is 2/3, realize identical damage equivalent in length and breadth to hindering other consistent identification of level.

For preventing omission; Can arrange a cover magnetosensitive assembly again, two cover magnetosensitive assemblies are arranged in the axial direction dislocation of conducting magnetic component, in its horizontal direction alternative arrangement; Magnetic field intensity for this cover magnetosensitive assembly is picked up is handled according to above-mentioned identical mode, with the accuracy of guaranteeing to detect.

Be example with two cover magnetosensitive detection components below, the structure based on superpower magnetized conducting magnetic component leakage magnetic detection device provided by the invention is described.Shown in Fig. 3 .1, it mainly comprises feed-through coil 3, first, second magnetosensitive assembly 5,5 ', signal identification compensation assembly 6, data collecting card 7, magnetosensitive unit installing board 8.First, second magnetosensitive assembly 5,5 ' and feed-through coil 3 connect as one through magneto sensor installing plate 8.

During detection; Let conducting magnetic component 4 go up with the dead-beat relative motion through through mode magnetizing coil and magnetosensitive detecting element at driving rolls 9,9 '; 3 pairs of conducting magnetic components 4 to be detected of feed-through coil carry out the superpower magnetization of single axial; Magnetizing field strength reaches more than the 1T, and first, second magnetosensitive assembly 5,5 ' picks up the leakage field information that vertical, horizontal is hindered on the seized member 4, discerns and compensates through the vertical, horizontal wounding signal that 6 pairs of compensation assemblies of signal identification are detected; After reaching the identical vertical, horizontal wounding signal amplitude of damage equivalent and equating, obtain the detection signal of digital quantity through data collecting card 7.When conducting magnetic component drive unit 9,9 ' drive conducting magnetic component 4 to be detected through feed-through coil 3, the one the second magnetosensitive assemblies 5,5 ' after, accomplish the whole detection of conducting magnetic component 4.

Signal identification compensation assembly 6 is made up of totalizer 10, comparer 11,12 series connection of first amplifier; Discern in order to the detecting signal that vertical, horizontal is hindered and to judge and the in addition compensation deals of its amplitude; Wherein totalizer 10 is in order to sue for peace to magneto sensor output signal; Comparer 11 is in order to compare the output signal and to discern differentiation according to formula, and first amplifier 12 carries out amplitude compensation to the signal after the identification at last.Totalizer 10 links to each other with first, second magnetosensitive detection components 5,5 ' respectively.Data collecting card 7 is made up of wave filter 13, second amplifier 14 and A/D converter 15 series connection.Wave filter 13 links to each other with first amplifier 12.

Shown in Fig. 3 .2, magnetosensitive assembly 5 is made up of magneto sensor 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, and magnetosensitive assembly 5 ' is made up of magneto sensor 5a ', 5b ', 5c ', 5d ', 5e ', 5f ', 5g ', 5h '. Magneto sensor 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h and 5a ', 5b ', 5c ', 5d ', 5e ', 5f ', 5g ', 5h ' arrange in the dislocation of conducting magnetic component axial direction, in conducting magnetic component horizontal direction alternative arrangement, in case the leak-stopping inspection.

Instance:

Shown in Fig. 3 .1, the magnetosensitive assembly when detecting steel pipe 4a, square drilling tool 4b, sheet material 4c and rail 4d in the pick-up unit of the present invention is respectively shown in the 5o among Fig. 4 .1 to 4.4,5p, 5q and 5r.

During detection, for the horizontal wound of N5 (section loss 5%100), magneto sensor 5a, 5b, 5c obtain corresponding detecting signal and are respectively V ₁₁, V ₁₂, V ₂₁, its summation is output as V ₁₁+ V ₁₂, V ₁₁+ V ₂₁, what can obtain correspondence detects output waveform like Fig. 5 .1, shown in 5.2.

The magnitude relation of detecting signal is:

$\left.\begin{array}{c}{\mathrm{<figure-callout\; id="11"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{11}+{\mathrm{<figure-callout\; id="21"\; label="V"\; filenames="H2008102366017E00082.png"\; state="\{\{state\}\}">V</figure-callout>}}_{21}={2\mathrm{<figure-callout\; id="11"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{11}={2V}_{21}\\ {\mathrm{<figure-callout\; id="11"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{11}+{\mathrm{<figure-callout\; id="12"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{12}={\mathrm{<figure-callout\; id="11"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{11}={\mathrm{<figure-callout\; id="12"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{12}\end{array}\right\}$

Satisfy formula (I), be judged as horizontal wound, meet in opposite directions with reality.

For vertical wound of N5 (section loss 5%100), magneto sensor 5a, 5b, 5c obtain corresponding detecting signal and are respectively V ₁₁, V ₁₂, V ₂₁, its summation is output as V ₁₁+ V ₁₂, V ₁₁+ V ₂₁, what can obtain correspondence detects output waveform like Fig. 5 .3, shown in 5.4.

The magnitude relation of detecting signal is:

$\left.\begin{array}{c}{\mathrm{<figure-callout\; id="11"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{11}+{\mathrm{<figure-callout\; id="12"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{12}={2\mathrm{<figure-callout\; id="11"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{11}={2V}_{12}\\ {\mathrm{<figure-callout\; id="11"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{11}+{\mathrm{<figure-callout\; id="21"\; label="V"\; filenames="H2008102366017E00082.png"\; state="\{\{state\}\}">V</figure-callout>}}_{21}={\mathrm{<figure-callout\; id="11"\; label="V"\; filenames="H2008102366017E00031.png,H2008102366017E00071.png"\; state="\{\{state\}\}">V</figure-callout>}}_{11}\end{array}\right\}$

Satisfy formula (II), be judged as vertical wound, meet in opposite directions with reality.

At this moment, N5 correctly is judged as vertical wound, it is carried out signal amplify compensation; Enlargement factor is 1.5; Let its detecting signal maximum amplitude and N5 laterally hinder quite, shown in Fig. 5 .5, realize that finally the vertical, horizontal that identical damage equivalent is all N5 hinders other consistent identification of level.

Claims (6)

1. superpower magnetization flux-leakage detection method of conducting magnetic component, its step comprises:

The 1st goes on foot, conducting magnetic component to be detected is stretched in the feed-through coil, and it is carried out axial superpower magnetization, forms the superpower exciting field that vertical, horizontal is hindered leakage field;

The 2nd step, utilize the magnetosensitive detecting element to pick up vertical, horizontal injury leakage field, two magnetosensitive detecting elements are set at the axial direction of conducting magnetic component to be detected, at least two magnetosensitive detecting elements of circumferential direction setting, the take-off location point becomes array distribution;

The 3rd step, the magnetic field that the magnetosensitive detecting element is picked up are converted into voltage signal, if voltage has sudden change, this take-off location point of conducting magnetic component exists hinders, otherwise there is not wound in this take-off location point of conducting magnetic component;

The 4th step, conducting magnetic component to be detected through through mode magnetizing coil and magnetosensitive detecting element, repeat said process with the dead-beat relative motion, accomplish the complete detection that vertical, horizontal is hindered on the member body.

2. according to the superpower magnetization flux-leakage detection method of the said conducting magnetic component of claim 1, it is characterized in that: the magnetic field intensity V of take-off location point is designated as in the 2nd step:

$\left|\begin{array}{cc}{V}_{11}& V_{12}\\ V_{21}& V_{22}\\ .& .\\ .& .\\ .& .\\ V_{n1}& V_{n2}\end{array}\right|$

Exist if the 3rd step was confirmed to hinder, then carry out following processing;

1., adopting signal summation and relative method to carry out the vertical, horizontal wounding signal distinguishes:

Utilize following formula (I) (II) to judge: when formula (I) was set up, this voltage signal was the detecting signal of laterally hindering, and when formula (II) was set up, this voltage signal was the detecting signal of vertically hindering;

$\left.\begin{array}{c}{V}_{\mathrm{ij}}+V_{(i+1)j}={2V}_{\mathrm{ij}}={2V}_{(i+1)j}\\ V_{\mathrm{ij}}+V_{i(j+1)}=V_{\mathrm{ij}}=V_{i(j+1)}\end{array}\right\}---\left(I\right)$

$\left.\begin{array}{c}{V}_{\mathrm{ij}}+V_{i(j+1)}={2V}_{\mathrm{ij}}={2V}_{i(j+1)}\\ V_{\mathrm{ij}}+V_{(i+1)j}=V_{\mathrm{ij}}\end{array}\right\}---\left(\mathrm{II}\right)$

In the formula, i, j represent the sequence number of circumferential direction and axial direction magnetosensitive detecting element respectively;

2. vertical, horizontal is hindered detecting signal and compensates, realize identical damage equivalent in length and breadth to hindering other consistent identification of level.

3. the superpower magnetization flux-leakage detection method of conducting magnetic component according to claim 1 and 2; It is characterized in that: also misplacing at the axial direction of conducting magnetic component to be detected is furnished with two magnetosensitive detecting elements; Its circumferential direction also alternative arrangement has at least two magnetosensitive detecting elements, and the take-off location of being set up point becomes array distribution.

4. superpower magnetization leakage magnetic detection device of conducting magnetic component, it is characterized in that: it comprises feed-through coil (3), the first magnetosensitive assembly (5), signal identification compensation assembly (6), data collecting card (7) and magnetosensitive unit installing board (8);

The first magnetosensitive assembly (5) connects as one through magnetosensitive unit installing board (8) with feed-through coil (3);

Signal identification compensation assembly (6) is made up of totalizer (10), comparer (11), first amplifier (12) series connection, and totalizer (10) links to each other with the first magnetosensitive assembly (5); Data collecting card (7) is made up of wave filter (13), second amplifier (14) and A/D converter (15) series connection; Wave filter (13) links to each other with first amplifier (12);

The first magnetosensitive assembly (5) comprises into the magnetosensitive detecting element of array distribution, wherein, is provided with two magnetosensitive detecting elements at the axial direction of conducting magnetic component to be detected, is provided with at least two magnetosensitive detecting elements in circumferential direction.

5. the superpower magnetization leakage magnetic detection device of conducting magnetic component according to claim 4 is characterized in that: it also comprises the second magnetosensitive assembly (5 '), and the second magnetosensitive assembly (5 ') is connected with magnetosensitive unit installing board (8); Magnetosensitive detecting element in first, second magnetosensitive assembly (5,5 ') is arranged in the axial direction dislocation of conducting magnetic component to be detected, in conducting magnetic component circumferential direction alternative arrangement.

6. according to claim 4 or the superpower magnetization leakage magnetic detection device of 5 described conducting magnetic components, it is characterized in that: it also comprises two driving rollss (9,9 '), and they lay respectively at the both sides of conducting magnetic component to be detected.

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