CN217717612U - In-plane bidirectional high-precision eddy current nondestructive flaw detection device - Google Patents
In-plane bidirectional high-precision eddy current nondestructive flaw detection device Download PDFInfo
- Publication number
- CN217717612U CN217717612U CN202221587673.8U CN202221587673U CN217717612U CN 217717612 U CN217717612 U CN 217717612U CN 202221587673 U CN202221587673 U CN 202221587673U CN 217717612 U CN217717612 U CN 217717612U
- Authority
- CN
- China
- Prior art keywords
- eddy current
- probe
- plane
- current nondestructive
- square coils
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model discloses a two-way high accuracy eddy current nondestructive inspection detection device in face, including setting up test probe and the printed circuit board in the probe casing, test probe includes the coil fixed plate, and five plane square coils that constitute five tubular structure are fixed to be set up on the coil fixed plate, five plane square coils end to end in proper order and connect jointly at the both ends of vibration source, all set up a set of magnetic sensor between per two adjacent plane square coils. Through the utility model discloses a test probe can realize metal material's two-way detection in face, improve the defect detection precision.
Description
Technical Field
The utility model relates to an eddy current testing technical field specifically is a two-way high accuracy eddy current nondestructive test detection device in face.
Background
Eddy current flaw detection is a method for detecting surface defects of components and metal materials by using the principle of electromagnetic induction, and the detection method is a detection coil and its classification and the structure of the detection coil.
The principle is that an exciting coil is used to generate eddy current in a conductive component, and a detecting coil is used to measure the variation of the eddy current, so as to obtain the information about the component defect. According to the shape of the detection coil, the detection coil can be divided into three types, namely a through type (used for detecting wires, rods and pipes), a probe type (used for locally detecting the surface of a component) and an insertion type (used for detecting the inside of a pipe hole). The eddy current flaw detection is a nondestructive flaw detection technology in which an eddy current is induced on the surface of a metal eddy current flaw detector by an alternating current electromagnetic coil. It is suitable for defect detection of conductive materials, including ferromagnetic and non-ferromagnetic metallic material components. Because of eddy current inspection, the coil and the component are not required to be in close contact during detection, and a coupling agent is not required to be filled between the coil and the component, so that the inspection automation is easy to realize.
The existing eddy current flaw detection device mostly adopts a vertical coil, the detection depth of the coil is shallow, and the most important factor is that the lifting-off noise is large, so that the whole detection device is greatly influenced. For example, the chinese patent application with publication number CN110031544A in the prior art discloses a remote rotary eddy current nondestructive inspection system, which includes two sets of coils wound on an iron core and an electromagnetic sensor array. The two groups of coils are used as eddy current generating devices, form independent circuits through coil wires respectively and are connected with a signal generating circuit, and the signal generating circuit excites the coils through two sine wave signals with the phase difference of 90 degrees to enable the coils to generate rotating eddy currents around the measured rail surface or sub-surface.
The existing plane coil probe is mostly formed by combining two opposite plane coils, so that the detection depth is improved, and the lift-off noise is reduced.
Disclosure of Invention
In order to solve the problem, the utility model provides a realize two-way detection's eddy current nondestructive inspection detection device in face.
In order to achieve the purpose, the utility model discloses a realize through following technical scheme:
the utility model relates to a two-way high accuracy eddy current nondestructive inspection detection device in face, including setting up test probe and the printed circuit board in the probe casing, test probe includes the coil fixed plate, and five plane square coils that constitute five tubular structure are fixed to be set up on the coil fixed plate, five plane square coils end to end in proper order and connect jointly at the both ends of vibration source, all set up a set of magnetic sensor between per two adjacent plane square coils.
The utility model discloses a further improvement lies in: the sensitive axis direction of the magnetic sensors is parallel to the opposite sides of the two adjacent plane square coils, and the sensitive axis direction of each group of the magnetic sensors is consistent.
The utility model discloses a further improvement lies in: a shielded cable line to which a cable plug is connected is led in from one end of the probe housing and electrically connected to the printed circuit board.
The utility model discloses a further improvement lies in: and a power indicator light electrically connected with the printed circuit board is arranged on the probe shell.
The utility model discloses a further improvement lies in: an adjustable clamping part is arranged on the outer surface of the probe shell.
The utility model has the advantages that: 1. the utility model discloses a four plane coils cascade mode two bisymmetry designs, and the vortex of two orientations of mutually perpendicular in the plane can be detected respectively to four group's magnetic sensing sensors of two bisymmetry cooperations, realizes two-way detection in the face.
2. Two sets of sensors that are symmetrical each other can detect same defect, improve the defect detection precision.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a plan view of the probe of the present invention;
fig. 3 is a schematic view of the excitation magnetic field generated by the detection probe of the present invention;
fig. 4 is a schematic diagram of the eddy current field and the magnetic sensor position structure induced by the excitation magnetic field of the present invention.
Wherein:
1-detecting the probe; 2-a probe shell; 3-adjusting the screw thread; 4-a printed circuit board; 5-clamping the nut; 6-power indicator light; 7-shielded cable lines; 8-a cable plug;
101-a coil fixing plate; 102-planar square coils; 103-an oscillation source; 104-magnetic sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 1, the utility model relates to a two-way high accuracy eddy current nondestructive inspection detection device in face includes test probe 1, probe housing 2 and printed circuit board 4, test probe 1 all sets up in probe housing 2 with printed circuit board 4, and test probe 1's right-hand member connects on printed circuit board 4, shielding cable line 7 is introduced to the rightmost end of probe housing 2, shielding cable line 7's the other end is provided with cable plug 8.
The probe shell 2 is provided with an adjustable clamping part which comprises an adjusting thread 3 arranged on the outer surface of the probe shell 2, and the adjusting thread 3 is provided with at least one clamping nut 5. The probe housing 2 is made up of two symmetrical shells which are held together by a clamping nut 5. The right side of probe casing 2 is provided with the end plate that inserts 2 inboards of probe casing, and power indicator 6 fixes on the end plate, whether enough effective display power switches on, reminds the user to open or close detection device.
As shown in fig. 2 and 3, the detection probe 1 includes a coil fixing plate 101, planar square coils 102, an oscillation source 103, and a plurality of magnetic sensors 104, wherein five planar square coils 102 are fixedly disposed on the coil fixing plate 101, the five planar square coils 102 form a five-cylinder structure, the five planar square coils 102 are sequentially connected end to end and are commonly connected to two ends of the oscillation source 103, a group of magnetic sensors 104 is disposed between every two adjacent planar square coils 102, and each group of magnetic sensors 104 is at least two.
After the oscillation source 103 in the detection probe 1 provides an excitation current for the planar square coils 102, two parallel sides of two adjacent planar square coils 102 generate excitation magnetic fields with the same rotation direction, and the intersection of the two magnetic fields is in a state of near zero magnetic field. In the five square planar coils 102, magnetic field planes perpendicular to the coil fixing plate 101 are generated between every two adjacent coils, and two adjacent groups of four groups of generated excitation magnetic fields are perpendicular to each other. The magnetic sensor 104 is disposed such that the axis-sensitive direction does not sense a change in the excitation magnetic field in the vertical direction. After the excitation magnetic field acts on the metal plate to be detected, an eddy current electric field is generated on the plane of the metal plate to be detected, the direction of the eddy current field generated at the position where the magnetic sensor 104 is placed is approximately parallel to the sensitive axis direction of the magnetic sensor 104, and the induced magnetic field generated by the eddy current is also perpendicular to the sensitive axis direction of the magnetic sensor 104, so that the magnetic sensor 104 cannot generate output on the metal plate to be detected without cracks, but once the shape of the crack eddy current is broken, the direction of the induced magnetic field generated by the eddy current generates a component parallel to the sensitive axis direction of the magnetic sensor 104, and at the moment, the magnetic sensor 104 can detect the change of the induced magnetic field to generate output.
Because the magnetic fields in two directions are perpendicular to each other in the whole plane, the four groups of magnetic sensors 104 can roughly judge the size, the length and the width of the crack of the metal plate to be detected in the plane, and the multiple sensors measure the same crack together, so that the detection precision of the sensors can be improved to a great extent, and random errors are reduced.
The utility model discloses a device during operation needs 1 position down with whole device test probe, and the below level of test probe 1 has placed the metal sheet that needs to wait to detect, has inserted cable plug 8 this moment and has supplied power for whole detection device, and oscillation source 103 begins to work this moment and provides excitation current for plane square coil 102, and then plane square coil 102 produces excitation magnetic field.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. The utility model provides a two-way high accuracy eddy current nondestructive inspection detection device in face, is including setting up testing probe (1) and printed circuit board (4) in probe casing (2), its characterized in that: the detection probe (1) comprises a coil fixing plate (101), five plane square coils (102) forming a five-cylinder structure are fixedly arranged on the coil fixing plate (101), the five plane square coils (102) are sequentially connected end to end and are connected to two ends of an oscillation source (103) together, and a group of magnetic sensors (104) is arranged between every two adjacent plane square coils (102).
2. The in-plane bidirectional high-precision eddy current nondestructive testing device according to claim 1, characterized in that: the sensitive axis direction of the magnetic sensors (104) is parallel to the opposite sides of the two adjacent plane square coils (102), and the sensitive axis direction of each group of the magnetic sensors (104) is consistent.
3. The in-plane bidirectional high-precision eddy current nondestructive testing device according to claim 1, characterized in that: a shielded cable line (7) connected with a cable plug (8) is led in from one end of the probe shell (2) and is electrically connected with the printed circuit board (4).
4. The in-plane bidirectional high-precision eddy current nondestructive testing device according to claim 1, characterized in that: and a power indicator lamp (6) electrically connected with the printed circuit board (4) is arranged on the probe shell (2).
5. The in-plane bidirectional high-precision eddy current nondestructive testing device according to claim 1, characterized in that: an adjustable clamping part is arranged on the outer surface of the probe shell (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221587673.8U CN217717612U (en) | 2022-06-23 | 2022-06-23 | In-plane bidirectional high-precision eddy current nondestructive flaw detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221587673.8U CN217717612U (en) | 2022-06-23 | 2022-06-23 | In-plane bidirectional high-precision eddy current nondestructive flaw detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217717612U true CN217717612U (en) | 2022-11-01 |
Family
ID=83775374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221587673.8U Active CN217717612U (en) | 2022-06-23 | 2022-06-23 | In-plane bidirectional high-precision eddy current nondestructive flaw detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217717612U (en) |
-
2022
- 2022-06-23 CN CN202221587673.8U patent/CN217717612U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4806863A (en) | Eddy current apparatus including cylindrical coil with flux concentrator for high resolution detection of flaws in conductive objects | |
| JP2714386B2 (en) | Circumferentially compensated eddy current probe | |
| JPS63298052A (en) | Eddy current probe | |
| CN109781838B (en) | Vortex-ultrasonic detection probe based on V-shaped coil excitation | |
| CN108088900B (en) | Multifunctional composite probe for pipeline internal detection | |
| US6014024A (en) | Apparatus and method for detecting and/or measuring flaws in conductive material | |
| CN103196996B (en) | A kind of eddy current testing device for carrying out metal defect detection and eddy current probe thereof | |
| US20120274319A1 (en) | Eddy Current Probe for Surface and Sub-Surface Inspection | |
| Liu et al. | In-pipe detection system based on magnetic flux leakage and eddy current detection | |
| CN110146590A (en) | Eddy Current Nondestructive Testing device based on array-type sensor | |
| CN217717612U (en) | In-plane bidirectional high-precision eddy current nondestructive flaw detection device | |
| CN210376233U (en) | Orthogonal rotation eddy current detection system | |
| CN207908434U (en) | A kind of multifunctional combination probe for pipeline detection | |
| US5777469A (en) | Method and apparatus for detecting flaws in conductive material | |
| CN210834768U (en) | Eddy current flaw detection device based on orthogonal detection | |
| US5986452A (en) | Apparatus and method for detecting flaws in conductive material | |
| CN115015379A (en) | Planar coil/TMR composite electromagnetic sensor for crack depth detection, probe and application method | |
| EP0186964A1 (en) | Eddy current probes for detecting faults in structures and methods of detecting such faults | |
| Yue et al. | Eddy current testing device for detecting pipeline defects based on the principle of differential excitation | |
| CN204758533U (en) | Leak magnetic sensor probe | |
| Dodd et al. | Eddy current inspection of ferromagnetic materials using pulsed magnetic saturation | |
| CN219245435U (en) | Pipeline vortex inner detector based on cross excitation | |
| CN217521078U (en) | Vortex detection device capable of detecting cracks in different directions | |
| JPH07167839A (en) | Inspection coil for electromagnetic induction flaw detection and flaw detecting method | |
| US11860127B2 (en) | Eddy current probe based on Halbach array coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |