CN106996955B - A kind of magnetic memory detection device for curved surface - Google Patents
A kind of magnetic memory detection device for curved surface Download PDFInfo
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- CN106996955B CN106996955B CN201610051146.8A CN201610051146A CN106996955B CN 106996955 B CN106996955 B CN 106996955B CN 201610051146 A CN201610051146 A CN 201610051146A CN 106996955 B CN106996955 B CN 106996955B
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- 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
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Abstract
The present invention is suitable for field of non destructive testing, a kind of magnetic memory detection device for curved surface is provided, including circular arc bottom plate, the circular arc bottom plate up to be equipped with less one have slot engagement sleeves component, an activity detection part is inserted on wherein at least one slot, the activity detection part includes the expansion plate of an insertion slot, the expansion plate rear end is equipped with aperture, elastic parts is also equipped in expansion plate aperture, the flexible front edge of board is equipped with steamboat and Magnetic Memory sensor probe, the minimum point of a little higher than steamboat of the minimum point of the Magnetic Memory sensor probe, the curved plate middle position is also vertically and fixedly provided with trolley, shaft position sensor and radial displacement transducer are installed on the trolley.In Magnetic memory testing, the lift-off value between Magnetic Memory sensor probe and device under test curved surface immobilizes, and ensure that accuracy in detection.Solves the problems, such as the radial positioning of trolley in measurement by radial displacement transducer simultaneously.In addition present apparatus structure is very firm, and at work, twisting angle is greatly reduced Magnetic Memory sensor probe, and the data obtained are relatively reliable.
Description
Technical field
The invention belongs to technical field of nondestructive testing more particularly to a kind of magnetic memory detection devices for curved surface.
Background technique
Ferromagnetic material when in use, can generate spontaneous manetization under plus load or stress repeatedly, this is naturally existing
As being defined as metal magnetic memory (Metal Magnetic Memory).Hereafter Magnetic Memory is used in field of non destructive testing, together
When various design forms detecting instrument occur in succession.
There is the pipe detection device of fixed curvature at present, also there is the tank body detection device of fixed curvature.But these are designed
Device be only applicable to certain fixation test object, do not have versatility generally.Meanwhile different designs, according to its detection
The difference of object, there are one the Movement consistency problems of Magnetic Memory sensor probe, that is, possibility in the detection of popping one's head in
The angle of generation twists and variation issue.This problem is most important for Magnetic memory testing, because in Magnetic memory testing
What is measured is size and the side of the spontaneous magnetic flux leakage in surface (Self-Magnetic Leakage Field, SMLF) of device under test
To in the case where the angle of Magnetic Memory probe changes, the size and Orientation data obtained, it is unreliable all to become.
The detection of the curved surface scanning of boiler or storage tank is the problem frequently encountered in actually detected.In such case
Under, because of its surface imperfection to be detected, displacement sensor record can not accurate recording displacement data, so often there is missing inspection
Situation.It is also a problem that the display of its data simultaneously, which reappears, due to lacking the corresponding location information of Magnetic Memory data, leads to data
It is difficult to correspond between practical device under test.
The surfaces externally and internally detection of variable diameters pipeline is actually detected middle another problem through being commonly encountered.General on-site test
Device is designed using wheelbarrow, and small Chinese herbaceous peony installs a few probe, to be close to curved surface to be detected as far as possible.In such case
Under, by taking variable diameters pipeline as an example, axial displacement can be recorded.But in the motion process of detection device, radial displacement
It is just ignored, this is equally unfavorable for the one-to-one correspondence of the data obtained and pipe under test, frequent appearance position deviation, to detection people
Member brings puzzlement.
Summary of the invention
In view of the above problems, the purpose of the present invention is to provide a kind of magnetic memory detection devices for curved surface, it is intended to solve
Certainly existing Curved dectection device does not have versatility and the larger technical problem of testing result deviation.
The present invention adopts the following technical scheme:
The magnetic memory detection device for curved surface includes one piece of circular arc bottom plate, and the circular arc bottom plate up to being equipped with less
One has the engagement sleeves component of slot, and the circular arc bottom plate is equipped with the aperture being connected to engagement sleeves component, wherein at least has
An activity detection part is inserted on one slot, the activity detection part includes the expansion plate of an insertion slot, described flexible
Plate rear end is equipped with aperture, and elastic parts is also equipped in expansion plate aperture, and the elastic parts is that the expansion plate is inserted described
Mobile in slot to provide restoring force, the flexible front edge of board is equipped with steamboat and Magnetic Memory sensor probe, the Magnetic Memory sensing
The minimum point of a little higher than steamboat of minimum point of device probe, the curved plate middle position are also vertically and fixedly provided with trolley,
Be equipped on the trolley for record trolley and bottom plate direction of advance displacement shaft position sensor and for recording it is small
The radial displacement transducer of vehicle and bottom plate radial displacement, the shaft position sensor and radial displacement transducer right angle setting.
Further, the elastic parts is adjustable spring, the circular arc bottom plate and expansion plate near respective aperture all
It is provided with an aperture, adjustable spring one end hook is mounted on the aperture of the circular arc bottom plate, and other end hook is mounted on
On the aperture of the expansion plate.
Further, the engagement sleeves component includes a U-shaped guide plate and cover board, by bolt by the U-shaped guiding
Plate, cover board are fixed on the circular arc bottom plate, and the circular arc bottom Board position immediately below the cover board and cover board is all provided with aperture, described
The space that circular arc bottom plate, U-shaped guide plate and cover board are formed is the slot.
Further, it is also vertically and fixedly provided with folded plate on the side of the flexible front edge of board, the steamboat is mounted on the folding
On plate, Magnetic Memory sensor probe side is additionally provided with tabletting, is consolidated the Magnetic Memory sensor probe by the tabletting
It is scheduled on the flexible front edge of board, the Magnetic Memory sensor probe direction is parallel with rectilinear direction where the expansion plate.
Further, the minimum point of the Magnetic Memory sensor probe is 1-2mm higher than the minimum point of the steamboat.
Further, the shaft position sensor and radial displacement transducer are connect with the trolley.
Further, the magnetic memory detection device further includes circular arc compoboard identical with the circular arc base plate configuration,
The circular arc bottom plate and circular arc combination board ends are equipped with connecting hole, by adjacent connecting hole, the circular arc bottom plate and circular arc group
Plywood is spliced into an annulus.
Further, one or more activity detection parts are also equipped on the circular arc compoboard.
The beneficial effects of the present invention are: the present invention provides a kind of reliable, simple curved surface magnetic memory detection devices, including
The inside and outside Curved dectection of tapered pipeline Surface testing and cylinder is also common to the Curved dectection that some radiuses are not much different；?
In detection process, inspector pushes trolley to move on curved surface, and activity detection part is also moved with trolley；In elastic parts
Under active force, in entire detection process, the steamboat of activity detection part remains the intimate surface contact with device under test, i.e.,
Device under test surface is set to change, the Magnetic Memory sensing that the radius of curvature of curved surface changes and steamboat relative position is fixed
The lift-off value that device probe can be kept fixed, is then used cooperatively shaft position sensor and radial displacement transducer, favorably
Control and mark in later data processing and data and detection device, improve the accuracy of detection efficiency and data.
In addition circular arc bottom plate is slab construction, is fixed with cart vertical, and structure is very firm, Magnetic Memory sensor probe at work,
Twisting angle is greatly reduced, and the data obtained are relatively reliable.
Detailed description of the invention
Fig. 1 is a kind of structure chart of the magnetic memory detection device provided in an embodiment of the present invention for curved surface.
Fig. 2 is the structure chart of circular arc bottom plate in Fig. 1；
Fig. 3 is the structure chart of activity detection part in Fig. 1；
Fig. 4 is the structure chart of trolley in Fig. 1；
Fig. 5 is another structure chart of the magnetic memory detection device provided in an embodiment of the present invention for curved surface.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be understood that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Fig. 1 shows the structure of the magnetic memory detection device provided in an embodiment of the present invention for curved surface, and Fig. 2 is therein
The structure of circular arc bottom plate, Fig. 3 are the structures of activity detection part, and Fig. 4 is the structure of trolley, are illustrated only for ease of description and this
The relevant part of inventive embodiments.
In conjunction with shown in Fig. 1-Fig. 4, the magnetic memory detection device provided in this embodiment for curved surface includes one piece of circular arc bottom
Plate 1, is at least equipped with the engagement sleeves component 2 for having slot 21 on the circular arc bottom plate 1, and the opening of slot 21 is towards circle
The center of circle of arc bottom plate 1, the circular arc bottom plate 1 and engagement sleeves component 2 are equipped with the aperture being connected to, wherein at least one slot 21
On be inserted with an activity detection part 3, the activity detection part 3 includes the expansion plate 31 of an insertion slot, the expansion plate 31
Rear end is equipped with aperture, and elastic parts 32 is also equipped in expansion plate aperture, and the elastic parts 32 is the expansion plate described
Mobile in slot to provide restoring force, 31 front end of expansion plate is equipped with steamboat 33 and Magnetic Memory sensor probe 34, the magnetic
The minimum point of a little higher than steamboat 33 of minimum point of memory sensor probe 34,1 middle position of curved plate are also vertical
It is fixed with trolley 4, the shaft position sensor for recording trolley and the displacement of bottom plate direction of advance is installed on the trolley 4
41, and the radial displacement transducer 42 for recording trolley and bottom plate radial displacement, the shaft position sensor 41 and diameter
To 42 right angle setting of displacement sensor.
In the present embodiment, the trolley 4 is vertically fixed on circular arc bottom plate 1, the lower edge of the circular arc bottom plate 1 approximately to
Component curve form is surveyed, can detecte a series of the parts to be tested that radius of curvature is not much different, there is certain versatility.The circle
One engagement sleeves component 2 is at least installed on arc bottom plate 1, three engagement sleeves components 2 are shown in Fig. 1.The engagement sleeves component
There is a slot 21 in centre, for being inserted into the expansion plate 31 of activity detection part 3.It is opened on the circular arc bottom plate 1 and engagement sleeves component 2
There is aperture, the aperture of the two is communicated through the slot.The rear end of the expansion plate 31 is equally also provided with the aperture of same shape,
Here aperture is rectangle, naturally it is also possible to be set as other suitable shapes.After slot is inserted into 31 rear end of expansion plate, by the bullet
Property component 32 be mounted in the aperture of expansion plate so that elastic parts 32 give one active force of expansion plate, expansion plate is pushed up outward
Out, simultaneous retractable plate will not be detached from slot.In this way in actually detected, inspector pushes trolley to move up in the parts to be tested curved surface
Dynamic, the activity detection part 3 being connected on circular arc bottom plate is also moved with trolley.Simultaneously as elastic group of connection expansion plate 31
The active force that part 32 provides, so that the steamboat 33 of activity detection part 3 remains the intimate surface contact with device under test, even if
Device under test surface changes, the Magnetic Memory sensor that the radius of curvature of curved surface changes and steamboat relative position is fixed
Then the lift-off value that probe 34 is also kept fixed is used cooperatively shaft position sensor 41 and radial displacement transducer 42, is convenient for
The control of later data processing and data and detection device and mark, improve the accuracy of detection efficiency and data.
In addition circular arc bottom plate 1 is slab construction, vertical with trolley 4 fixed, for example is bolted, and structure is very steady
Gu Magnetic Memory sensor probe is at work, twisting angle is greatly reduced, and the data obtained are relatively reliable.Axial direction described here
Displacement sensor 41 is used to record the axial displacement data of trolley, i.e. record trolley in the forward travel distance along device under test curved surface,
The radial displacement transducer 42 is used to record the radial displacement data of trolley, i.e., record trolley apart from the parts to be tested axle center away from
From delta data.At least there are two wheels for the trolley, to keep the Movement consistency in detection as far as possible.The route of car interior
Plate (being not drawn into figure) receives the magnetic field data of Magnetic Memory sensor probe output and the displacement of two displacement sensors output
Data are exported by wired or wireless mode to host after the pooling.
As a kind of specific structure of the engagement sleeves component 2, as shown in Fig. 2, including a U-shaped guide plate 22 and cover board
23, the U-shaped guide plate 22, cover board 23 are fixed on the circular arc bottom plate 1 by bolt, the cover board 23 and cover board are just
1 position of circular arc bottom plate of lower section is all provided with aperture, and the space that the circular arc bottom plate 1, U-shaped guide plate 22 and cover board 23 are formed is described
Slot 21.Here the main function of U-shaped guide plate 22 is oriented to activity detection part 3, is limited it and is swung, i.e., the described slot
21 width is slightly larger than the width of expansion plate 31, so that expansion plate 31 can just be inserted into the slot 21.In the U-shaped guiding
Cover board 23 above plate 22 also has a rectangle aperture among it.The main function of cover board 23 be with circular arc bottom plate 1 together,
Dynamic 3 swing of detection piece is limited, i.e., the thickness of the described slot 21 is slightly larger than the thickness of expansion plate 31, so that expansion plate 31 can be with
Just it is inserted into the slot 21.
When specific implementation, the elastic parts 32 is chosen as adjustable spring, and the circular arc bottom plate 1 and expansion plate 31 are respective
Near aperture, it is provided with an aperture 35, facilitates hook of the adjustable spring at both ends to install, specifically, described adjustable spring one end
Hook is mounted on the aperture of the circular arc bottom plate, and other end hook is mounted on the aperture of the expansion plate.Here circular arc bottom
Rectangle aperture on plate, expansion plate and cover board cooperates, and facilitates the installation and activity of adjustable spring.And the circular arc bottom
Plate, U-shaped guide plate and cover board cooperate, and are fixed using bolt by 6 mounting holes on its both sides.
It is also vertical fixed on the side of 31 front end of expansion plate as a kind of specific structure of the activity detection part 3
There is folded plate 36, the steamboat 33 is mounted on the folded plate 36, and 34 side of Magnetic Memory sensor probe is additionally provided with tabletting 37,
The Magnetic Memory sensor probe 34 is fixed on 31 front end of expansion plate by the tabletting 37, in Fig. 3, tabletting 37 passes through
Bolt is fixed on above expansion plate 31, and by loose bolts, the position of adjustable Magnetic Memory sensor probe 34 realizes tune
Whole lift-off value.But adjust anyway, it is desired nonetheless to guarantee that the direction of the Magnetic Memory sensor probe 34 is stretched with described
31 place rectilinear direction of plate is parallel.Under normal circumstances, the minimum point of the Magnetic Memory sensor probe is minimum than the steamboat
The high 1-2mm of point, this difference in height is lift-off value, can be freely arranged, and remain unchanged in entire measurement process.
The magnetic memory detection device of foregoing description is generally used for the Curved dectection of the parts to be tested such as boiler, storage tank, for becoming
Diameter pipe detection can further be extended the present apparatus.As shown, the magnetic memory detection device further include with it is described
The identical circular arc compoboard 5 of 1 shape of circular arc bottom plate, the circular arc bottom plate and circular arc combination board ends are equipped with connecting hole 51, lead to
Adjacent connecting hole is crossed, the circular arc bottom plate 1 is spliced into an annulus with circular arc compoboard 5.One can be installed on circular arc compoboard
A or multiple activity detection parts, mounting means is identical as the mounting means that activity detection part is mounted on circular arc bottom plate, i.e. circular arc
Compoboard is provided with engagement sleeves component, and the activity detection part is inserted in the slot of engagement sleeves component.In the detection process, if
Trolley drives whole device radial motion, then radial displacement transducer has output, records in this case to original axial fortune
The offset of dynamic rail mark facilitates the data in later period and the correspondence on detection surface.
Finally especially, it should be noted that, magnetic memory detection device shown in the drawings, slot is open towards circular arc bottom plate
The center of circle, activity detection part are located on the inside of circular arc bottom plate, and the Inner arc of circular arc bottom plate, can be with close to the external surface shape of device under test
For detecting the pipeline of device outer surface and outer diameter variation.In certain the present embodiment, the slot opening direction can also be anti-
To in the center of circle direction of the circular arc bottom plate, activity detection part is located at the outside of circular arc bottom plate, and the external arc of circular arc bottom plate is close
The inner surface configuration of device under test can be used for detecting the pipeline of device inner surface and internal diameter variation.Both implementations
It is within the scope of the present invention.
To sum up, technical solution through the invention, in Magnetic memory testing, Magnetic Memory sensor probe and device under test curved surface it
Between lift-off value immobilize, ensure that accuracy in detection.Solves trolley in measurement by radial displacement transducer simultaneously
Radial positioning problem.In addition present apparatus structure is very firm, and at work, twisting angle substantially drops Magnetic Memory sensor probe
Low, the data obtained are relatively reliable.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of magnetic memory detection device for curved surface, which is characterized in that the magnetic memory detection device includes one piece of circular arc
Bottom plate, the circular arc bottom plate up to being equipped with the engagement sleeves component for having slot, the circular arc bottom plate and engagement sleeves group less
Part is equipped with the aperture of connection, is inserted with an activity detection part on wherein at least one slot, the activity detection part includes
The expansion plate of one insertion slot, the expansion plate rear end are equipped with aperture, are also equipped with elastic parts in expansion plate aperture,
The elastic parts provides restoring force for the expansion plate is mobile in the slot, the flexible front edge of board be equipped with steamboat and
Magnetic Memory sensor probe, the minimum point of a little higher than steamboat of the minimum point of the Magnetic Memory sensor probe, the circular arc
Bottom plate middle position is also vertically and fixedly provided with trolley, be equipped on the trolley for record trolley and bottom plate direction of advance displacement
Shaft position sensor and radial displacement transducer for recording trolley and bottom plate radial displacement, the axial displacement sensing
Device and radial displacement transducer right angle setting.
2. being used for the magnetic memory detection device of curved surface as described in claim 1, which is characterized in that the elastic parts is flexible bullet
Spring, the circular arc bottom plate and expansion plate are all provided with an aperture, adjustable spring one end hook installation near respective aperture
On the aperture of the circular arc bottom plate, other end hook is mounted on the aperture of the expansion plate.
3. being used for the magnetic memory detection device of curved surface as claimed in claim 2, which is characterized in that the engagement sleeves component includes one
The U-shaped guide plate, cover board are fixed on the circular arc bottom plate by a U-shaped guide plate and cover board by bolt, the cover board with
And the circular arc bottom Board position immediately below cover board is all provided with aperture, the space that the circular arc bottom plate, U-shaped guide plate and cover board are formed is institute
State slot.
4. being used for the magnetic memory detection device of curved surface as claimed in claim 3, which is characterized in that the side of the flexible front edge of board
On be also vertically and fixedly provided with folded plate, the steamboat is mounted on the folded plate, and Magnetic Memory sensor probe side is additionally provided with pressure
The Magnetic Memory sensor probe is fixed on the flexible front edge of board by the tabletting by piece, and the Magnetic Memory sensor is visited
Head direction is parallel with rectilinear direction where the expansion plate.
5. being used for the magnetic memory detection device of curved surface as claimed in claim 4, which is characterized in that the Magnetic Memory sensor probe
Minimum point it is 1-2mm higher than the minimum point of the steamboat.
6. as claimed in claim 5 be used for curved surface magnetic memory detection device, which is characterized in that the shaft position sensor and
Radial displacement transducer is connect with the trolley.
7. being used for the magnetic memory detection device of curved surface as described in claim any one of 1-6, which is characterized in that the Magnetic Memory inspection
Surveying device further includes circular arc compoboard identical with the circular arc base plate configuration, and the circular arc bottom plate and circular arc combination board ends are equal
Equipped with connecting hole, by adjacent connecting hole, the circular arc bottom plate and circular arc compoboard are spliced into an annulus.
8. being used for the magnetic memory detection device of curved surface as claimed in claim 7, which is characterized in that also pacify on the circular arc compoboard
Equipped with one or more activity detection parts.
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| CN201610051146.8A CN106996955B (en) | 2016-01-26 | 2016-01-26 | A kind of magnetic memory detection device for curved surface |
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| CN201610051146.8A CN106996955B (en) | 2016-01-26 | 2016-01-26 | A kind of magnetic memory detection device for curved surface |
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| CN106996955B true CN106996955B (en) | 2019-10-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346446B (en) * | 2019-07-31 | 2024-05-10 | 中国石油大学(北京) | Nondestructive testing device |
| CN112505136B (en) * | 2020-11-27 | 2023-06-30 | 陕西工业职业技术学院 | Curved surface detection device based on magnetic memory and detection method thereof |
| CN113049672B (en) * | 2021-01-22 | 2023-07-14 | 马勇男 | Self-adaptive curved surface magnetic memory detection method |
| CN113720500B (en) * | 2021-08-31 | 2024-07-05 | 西红柿科技（武汉）有限公司 | Stress monitoring sensor and method for steel structure |
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