CN204302229U - A kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection - Google Patents
A kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection Download PDFInfo
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- CN204302229U CN204302229U CN201420865494.5U CN201420865494U CN204302229U CN 204302229 U CN204302229 U CN 204302229U CN 201420865494 U CN201420865494 U CN 201420865494U CN 204302229 U CN204302229 U CN 204302229U
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Abstract
The utility model relates to interior crossing type nondestructive detecting technology of vortex field, specifically discloses a kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection.An interior crossing type giant magnetoresistance array probe for nonferromagnetic light-wall pipe defects detection, this probe comprises and is arranged on excitation coil in probe framework and giant magneto-resistance sensor, and wherein, giant magneto-resistance sensor is positioned at the center of excitation coil.The interior crossing type giant magnetoresistance array probe of a kind of nonferromagnetic light-wall pipe defects detection described in the utility model, for the EDDY CURRENT of thin pipe wall, this probe not only improves the detection sensitivity of array probe for the defect of nonferromagnetic small-caliber pipeline, and expanding probe is for the detection range of defect yardstick; And improve the antijamming capability of array probe, extend the life cycle of probe.
Description
Technical field
The utility model belongs to interior crossing type nondestructive detecting technology of vortex field, is specifically related to a kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection.
Background technology
In nuclear power plant system, there is a large amount of heat exchangers, in the process manufactured and run, due to the difference of structure, heat transfer tube material, pipe fitting specification and operating condition, often produce various types of defect.EDDY CURRENT is a kind of lossless detection method be most widely used in the inspection of nuclear power station in-service heat transfering tube of heat exchanger.Wear axle in adopting traditionally to detect around formula coil (Bobbin) probe, have very high sensitivity to internal and external walls defect, defect can be found timely and accurately.But for gripper shoe and tube sheet district, especially the latter, architecture signals is complicated, the situation such as there is expand tube changeover portion and expand tube is uneven, makes electromagnetic induction occur " distortion " in this region, as defect occurs in this region, easily undetected, thus occur detecting " blind area ".For this situation, bring into use new technology both at home and abroad in evaporimeter EDDY CURRENT, namely array probe technology detects.The detection efficiency of the existing Bobbin probe of the method, has again the Flaw discrimination ability that MRPC (machinery rotates) pops one's head in.
Present stage applies to the eddy current array probe of engineering reality, mainly contain two kinds of structures, one is wire-wound coils eddy current array probe, it adopts the little flatwise coil group of directly placing two rows or three rows in probe framework, often be spaced a distance between row, cross arrangement between every winding displacement circle, another kind is flexible circuit board (PCB) array probe, this kind of probe, be on a flexible substrate, by the technical process similar to PCB, etch the array structure of design, coordinate with probe framework again, involution is carried out in junction.Above two kinds of probes, in the application process of reality, can ensure detection efficiency and sensitivity, but also there are some problems, and e.g., that pops one's head in pipeline moves back and forth, and easily makes the corrupted of flatwise coil unit, thus causes scrapping of array probe; Susceptibility for fine crack still haves much room for improvement; Pop one's head in jamproof indifferent etc.For these problems, this patent proposes the development of the eddy current array probe based on giant magnetoresistance technology.
Giant magneto-resistance sensor chip mainly utilizes the magnetic Nano metallic multilayer thin-film material with giant magnetoresistance effect by semiconductor integrated technique class components and parts compatible mutually with integrated circuit.Therefore can the volume of sensor chip be done very little.Four giant magnetoresistances are formed Wheatstone bridge configuration by giant magneto-resistance sensor chip.This structure can reduce the impact of external environment on sensor output stability, increases transducer sensitivity.Traditional EDDY CURRENT based on induction coil is often applied to high-frequency detection, and lower to the sensitivity of low frequency part, and giant magneto-resistance sensor frequency range very wide (0 ~ 1MHz).The volume of giant magneto-resistance sensor is usually very little, and is integrated on sensor chip by output circuit, and make it have better antijamming capability than traditional line of induction ring type probe, the speciality of its integrated chip in addition, the physical life than the probe of coil array is longer.
Summary of the invention
The purpose of this utility model is the interior crossing type giant magnetoresistance array probe providing a kind of nonferromagnetic light-wall pipe defects detection, and solve existing eddy current array probe scrappage high, tiny flaw detection sensitivity is not high, the problem that antijamming capability is weak.
The technical solution of the utility model is as follows: a kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection, this probe comprises and is arranged on excitation coil in probe framework and giant magneto-resistance sensor, wherein, giant magneto-resistance sensor is positioned at the center of excitation coil.
Described probe framework is circumferentially distributed with several excitation coils.
Described probe framework is uniformly distributed circumferentially 4 ~ N (N >=4) individual excitation coil.
Described excitation coil is the flat, hollow coil of horizontal.
Remarkable result of the present utility model is: the interior crossing type giant magnetoresistance array probe of a kind of nonferromagnetic light-wall pipe defects detection described in the utility model, for the EDDY CURRENT of thin pipe wall, this probe not only improves the detection sensitivity of array probe for the defect of nonferromagnetic small-caliber pipeline, and expanding probe is for the detection range of defect yardstick; And improve the antijamming capability of array probe, extend the life cycle of probe.
Accompanying drawing explanation
Fig. 1 is the interior crossing type giant magnetoresistance array probe schematic diagram of a kind of nonferromagnetic light-wall pipe defects detection described in the utility model;
Fig. 2 is that in Fig. 1, array probe is circumferentially arranged schematic diagram;
In figure: 1, excitation coil; 2, giant magneto-resistance sensor; 3, probe framework.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 1 and Figure 2, a kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection, be included in excitation coil 1 and giant magneto-resistance sensor 2 that probe framework 3 is arranged, wherein, probe framework 3 is circumferentially provided with several excitation coils 1, and in each excitation coil 1 central area, giant magneto-resistance sensor 2 is installed, wherein, excitation coil 1 adopts the flat, hollow coil of horizontal; Such as, in probe framework 3, be circumferentially evenly arranged the individual flat, hollow coil of 4 ~ N (N >=4), and in each flat, hollow hub of a spool position, giant magneto-resistance sensor be installed.
Claims (4)
1. the interior crossing type giant magnetoresistance array probe of a nonferromagnetic light-wall pipe defects detection, it is characterized in that: this probe comprises and is arranged on excitation coil (1) in probe framework (3) and giant magneto-resistance sensor (2), wherein, giant magneto-resistance sensor (2) is positioned at the center of excitation coil (1).
2. the interior crossing type giant magnetoresistance array probe of a kind of nonferromagnetic light-wall pipe defects detection according to claim 1, is characterized in that: described probe framework (3) is circumferentially distributed with several excitation coils (1).
3. the interior crossing type giant magnetoresistance array probe of a kind of nonferromagnetic light-wall pipe defects detection according to claim 2, is characterized in that: described probe framework (3) has been uniformly distributed circumferentially 4 ~ N (N >=4) individual excitation coil (1).
4., according to the interior crossing type giant magnetoresistance array probe of any described a kind of nonferromagnetic light-wall pipe defects detection of claims 1 to 3, it is characterized in that: the flat, hollow coil that described excitation coil (1) is horizontal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420865494.5U CN204302229U (en) | 2014-12-30 | 2014-12-30 | A kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420865494.5U CN204302229U (en) | 2014-12-30 | 2014-12-30 | A kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection |
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| CN204302229U true CN204302229U (en) | 2015-04-29 |
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| CN201420865494.5U Active CN204302229U (en) | 2014-12-30 | 2014-12-30 | A kind of interior crossing type giant magnetoresistance array probe of nonferromagnetic light-wall pipe defects detection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158331A (en) * | 2015-10-23 | 2015-12-16 | 爱德森（厦门）电子有限公司 | Device and method for in-service partial vortex scanning imaging of small-diameter pipe |
| CN105806933A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Inward passing-type colossal magnetoresistance array probe for nonferromagnetic thin-walled tube defect detection |
| CN112985647A (en) * | 2021-02-08 | 2021-06-18 | 天津大学 | Pipeline bending stress detection device |
-
2014
- 2014-12-30 CN CN201420865494.5U patent/CN204302229U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806933A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Inward passing-type colossal magnetoresistance array probe for nonferromagnetic thin-walled tube defect detection |
| CN105158331A (en) * | 2015-10-23 | 2015-12-16 | 爱德森（厦门）电子有限公司 | Device and method for in-service partial vortex scanning imaging of small-diameter pipe |
| CN105158331B (en) * | 2015-10-23 | 2018-01-02 | 爱德森（厦门）电子有限公司 | A kind of device and method of the in-service local eddy currents scanning imagery of small diameter tube |
| CN112985647A (en) * | 2021-02-08 | 2021-06-18 | 天津大学 | Pipeline bending stress detection device |
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