Miniaturized Barkhausen noise detection device

Abstract

The utility model discloses a miniaturized Barkhausen noise detection device. Wherein two clamping blocks which are oppositely arranged are fixed on the bottom plate through locking rods, and a test workpiece to be detected is placed between the clamping blocks; the upper end of each clamping block is provided with a foot column in a welded mode, and the upper ends of the two foot columns are fixedly connected with one supporting foot of the magnet yoke in an integrated forming mode. The end excitation coil, the selection excitation coil and the end excitation coil are sequentially arranged outside the magnet yoke; sliding grooves are formed in the inner sides of the foot columns, the two sliding grooves are oppositely arranged, and the two ends of the cross beam are inserted into clamping openings of the sliding grooves so as to be connected with the foot columns in a clamped mode. A detection magnetic sensing coil is mounted below the cross beam, the detection magnetic sensing coil is attached to the surface of the test workpiece, a telescopic part is fixed below the center of the cross beam, and the top of the test workpiece is propped against and fixed by the lower end of the telescopic part. According to the utility model, by arranging the semi-arc-shaped magnet yoke, the magnet exciting coil can be conveniently selected, and the distance between the magnet exciting coils on the surface of the magnet yoke can be adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing materials by using a magnetic method, in particular to a miniaturized Barkhausen noise detection device. Background Art

[0002] The Barkhausen noise analyzer is a completely non-destructive instrument for grinding burn detection. It has the advantages of high precision, good accuracy and sensitivity to ferromagnetic materials. Through a series of processes and transformations, the severity of grinding burn is matched to the size of the Barkhausen noise. This is the core of the principle of the Barkhausen noise method for checking grinding burn.

[0003] The number of turns of the existing Barkhausen noise detection magnetic sensitive coil is fixed, and it is difficult to select an appropriate magnetic strength detection coil according to the surface grind degree of the workpiece being detected, resulting in a lack of flexibility in the matching of the detection accuracy of the magnetic sensitive coil. Therefore, we propose a miniaturized Barkhausen noise detection device. Utility Model Content

[0004] In view of the problems existing in the background technology, the utility model provides a miniaturized Barkhausen noise detection device, and the technical scheme is as follows: comprising: a bottom plate, a card block, a foot column, two groups of end excitation coils, a selection excitation coil, a crossbeam, a detection magnetic sensitive coil and a magnetic yoke, wherein two oppositely arranged card blocks are fixed on the bottom plate by a locking rod, and a test workpiece to be detected is placed between the card blocks; a foot column is arranged at the upper end of each card block by welding, and the upper ends of the two foot columns are respectively integrally formed and fixedly connected with one leg of the magnetic yoke;

[0005] The rotation direction and number of coil turns of the selective excitation coil and the single group of end excitation coils are the same, the two ends of the selective excitation coil and the two groups of end excitation coils are respectively installed with male connectors and female connectors, the end excitation coil, the selective excitation coil and the end excitation coil are sequentially arranged outside the magnetic yoke, and one end surface of the two end excitation coils is respectively located at the end surface of one leg of the magnetic yoke and overlaps;

[0006] The female connector of the selection excitation coil is connected to the male connector of the adjacent end excitation coil on one side, and the female connector of the end excitation coil is connected to the male connector of the acquisition device; the male connector of the selection excitation coil is connected to the female connector of the adjacent end excitation coil on the other side, and the male connector of the end excitation coil is connected to the female connector of the acquisition device; thereby, the excitation coil at one end, the selection excitation coil and the excitation coil at the other end are connected in series; a slide groove is provided on the inner side of the foot column, and the two slide grooves are arranged oppositely, and the two ends of the crossbeam are inserted into the bayonet of the slide groove, so as to be clamped with the foot column; a detection magnetic sensitive coil is installed under the crossbeam, and the detection magnetic sensitive coil is in contact with the surface of the test workpiece to detect the noise signal on the surface of the test workpiece; the surface of the detection magnetic sensitive coil is covered with wire mesh;

[0007] A telescopic component is fixed below the center of the crossbeam, and the top of the test workpiece is tightly fixed by the lower end of the telescopic component.

[0008] The yoke is a semicircular arc rod, the yoke is made of iron material, and the diameter of the yoke is equal to the diameter of the foot column.

[0009] The excitation coils are selected to be multiple groups.

[0010] The detection magnetic sensitive coils are in two groups and are symmetrically installed at the bottom of the beam.

[0011] The telescopic component is a telescopic cylinder. An operating handle is provided on one side of the telescopic cylinder. The operating handle is used to adjust the height of the telescopic cylinder.

[0012] The bottom of the bottom plate is glued and connected with an anti-skid pad.

[0013] The locking rod is a structure of a nut and a stud, and the stud passes through the threaded holes of the base plate of the clamping block in sequence to fix the two.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model adjusts its own height through the upper foot column and the telescopic component fixed by clamping, so that the top of the test workpiece can be pressed tightly by the telescopic component, thereby enhancing the installation stability of the test workpiece.

[0016] 2. The utility model adopts a method of selecting the excitation coil and the excitation coil by connecting the male connector and the female connector in series in sequence, so as to increase the number of turns of the excitation coil and adjust the number of turns of the excitation coil on the surface of the yoke, thereby realizing flexible adjustment of the magnetic force on the surface of the yoke, which is beneficial to select an appropriate number of turns of the excitation coil according to the measured properties of the test workpiece, and improve the accuracy of surface noise detection of test workpieces with different surface properties.

[0017] 3. By setting a semicircular arc yoke, it is convenient to select the excitation coil and adjust the coil spacing on the surface of the yoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0019] Figure 2 This is a bottom perspective structural diagram of the present utility model.

[0020] In the figure: 1. Base plate; 2. Block; 3. Locking rod; 4. Test workpiece; 5. Foot; 6. Yoke; 7. End excitation coil; 8. Female connector; 9. Male connector; 10. Select excitation coil; 11. Slide; 12. Crossbeam; 13. Detection magnetic sensitive coil; 14. Telescopic component; 15. Operating handle. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1 and Figure 2 The embodiment of the miniaturized Barkhausen noise detection device of the utility model shown in the figure comprises: a bottom plate 1, a block 2, a foot column 5, two sets of end excitation coils 7, a selection excitation coil 10, a crossbeam 12, a detection magnetic sensitive coil 13 and a yoke 6, wherein two oppositely arranged blocks 2 are fixed on the bottom plate 1 by a locking rod 3, and a test workpiece 4 to be detected is placed between the blocks 2; a foot column 5 is provided at the upper end of each block 2 by welding, and the upper ends of the two foot columns 5 are respectively integrally formed and fixedly connected with one leg of the yoke 6;

[0023] The rotation direction and number of coil turns of the selection excitation coil 10 and the single group of end excitation coils 7 are the same, the two ends of the selection excitation coil 10 and the two groups of end excitation coils 7 are respectively installed with a male connector 9 and a female connector 8, the end excitation coil 7, the selection excitation coil 10 and the end excitation coil 7 are sequentially arranged outside the yoke 6, and one end surface of the two end excitation coils 7 is respectively located at the end surface of one leg of the yoke 6 and overlaps.

[0024] The female connector 8 of the selected excitation coil 10 is connected to the male connector 9 of the adjacent end excitation coil 7 on one side, and the female connector 8 of the end excitation coil 7 is connected to the male connector 9 of the acquisition device; the male connector 9 of the selected excitation coil 10 is connected to the female connector 8 of the adjacent end excitation coil 7 on the other side, and the male connector 9 of the end excitation coil 7 is connected to the female connector 8 of the acquisition device; thereby connecting one end excitation coil 7, the selected excitation coil 10 and the other end excitation coil 7 in series; a slide groove 11 is opened on the inner side of the foot column 5, and the two slide grooves 11 are arranged opposite to each other, and the two ends of the crossbeam 12 are inserted into the bayonet of the slide groove 11, so as to be clamped with the foot column 5; a detection magnetic sensitive coil 13 is installed under the crossbeam 12, and the detection magnetic sensitive coil 13 is in contact with the surface of the test workpiece 4, and is used to detect the noise signal on the surface of the test workpiece 4; the surface of the detection magnetic sensitive coil 13 is covered with wire mesh, which can shield external electromagnetic;

[0025] A telescopic component 14 is fixed at the lower center of the beam 12. The telescopic component 14 can adjust its height so that the top of the test workpiece 4 can be tightly fixed by the lower end of the telescopic component 14, thereby enhancing the installation stability of the test workpiece 4.

[0026] In this embodiment, the yoke 6 is a semicircular arc rod, the yoke 6 is made of iron material, and the diameter of the yoke 6 is equal to the diameter of the foot 5. By setting the semicircular arc yoke 6, it is convenient to select the excitation coil 10 and adjust the spacing between each group of end excitation coils 7; it is easy to understand that there can be multiple groups of excitation coils 10.

[0027] In this embodiment, there are two groups of detection magnetic sensitive coils 13 symmetrically installed at the bottom of the beam 12 .

[0028] In this embodiment, the telescopic component 14 is a telescopic cylinder. An operating handle 15 is provided on one side of the telescopic cylinder. The operating handle 15 is used to adjust the height of the telescopic cylinder.

[0029] In this embodiment, a non-slip pad is glued to the bottom of the base plate 1 so as to be stably placed on the test platform.

[0030] In this embodiment, the locking rod 3 is a structure of a nut and a stud, and the stud passes through the threaded holes of the clamping block 2 and the base plate 1 in sequence to fix the two.

[0031] When in use, first place the test workpiece 4 between the two blocks 2, then adjust the height of the telescopic part 14 to press the test workpiece 4, then place the noise detection sensor above the test workpiece 4, sequentially connect the acquisition device, the excitation coil 7 at one end, select the male connector and female connector of the excitation coil 10 and the other end of the excitation coil 7 to form a loop to form an excitation coil; turn on the external power supply and conduct the test.

[0032] At the same time, the male connector 9 and the female connector 8 of the two groups of end excitation coils 7 may also be directly connected without being connected to the selection excitation coil 10 to make the two groups of end excitation coils 7 connected. By adopting the connection method of connecting the selection excitation coil 10 and the end excitation coil 7 in series, the number of turns of the excitation coil connected to the acquisition device can be changed, and the number of turns of the excitation coil on the surface of the yoke 6 can be adjusted to achieve the adjustment of the surface magnetic force of the yoke 6. This is conducive to selecting an appropriate number of turns of the excitation coil according to the measured properties of the test workpiece 4, and improving the accuracy of surface noise detection of the test workpiece 4 with different surface properties.

Claims

1. A miniaturized Barkhausen noise detection device, characterized in that: include: A base plate (1), a clamping block (2), a foot column (5), two groups of end excitation coils (7), a selection excitation coil (10), a crossbeam (12), a detection magnetic sensitive coil (13) and a magnetic yoke (6), wherein two relatively arranged clamping blocks (2) are fixed on the base plate (1) via a locking rod (3), and a test workpiece (4) to be detected is placed between the clamping blocks (2); a foot column (5) is provided at the upper end of each clamping block (2) by welding, and the upper ends of the two foot columns (5) are respectively integrally formed and fixedly connected to a leg of the magnetic yoke (6); The rotation direction and number of coil turns of the selected excitation coil (10) and the single group of end excitation coils (7) are the same, the two ends of the selected excitation coil (10) and the two groups of end excitation coils (7) are respectively installed with a male connector (9) and a female connector (8), the end excitation coil (7), the selected excitation coil (10) and the end excitation coil (7) are sequentially arranged outside the magnetic yoke (6), and one end surface of the two end excitation coils (7) is respectively located at an end surface of a leg of the magnetic yoke (6) and overlaps; The female connector (8) of the selected excitation coil (10) is connected to the male connector (9) of the adjacent end excitation coil (7) on one side, and the female connector (8) of the end excitation coil (7) is connected to the male connector (9) of the acquisition device; the male connector (9) of the selected excitation coil (10) is connected to the female connector (8) of the adjacent end excitation coil (7) on the other side, and the male connector (9) of the end excitation coil (7) is connected to the female connector (8) of the acquisition device; thereby, the end excitation coil (7) and the selected excitation coil (10) are connected in series. An excitation coil (10) and an excitation coil (7) at the other end; a slide groove (11) is provided on the inner side of the foot column (5), the two slide grooves (11) are arranged opposite to each other, and the two ends of the cross beam (12) are inserted into the slots of the slide grooves (11), thereby being connected with the foot column (5); a detection magnetic sensitive coil (13) is installed below the cross beam (12), and the detection magnetic sensitive coil (13) is in contact with the surface of the test workpiece (4) and is used to detect noise signals on the surface of the test workpiece (4); the surface of the detection magnetic sensitive coil (13) is covered with wire mesh; A telescopic component (14) is fixed below the center of the crossbeam (12), and the top of the test workpiece (4) is tightly fixed by the lower end of the telescopic component (14).

2. A miniaturized Barkhausen noise detection device according to claim 1, characterized in that: The magnetic yoke (6) is a semicircular arc rod, the magnetic yoke (6) is made of iron material, and the diameter of the magnetic yoke (6) is equal to the diameter of the foot column (5).

3. A miniaturized Barkhausen noise detection device according to claim 1, characterized in that: The selective excitation coils (10) are multiple groups.

4. A miniaturized Barkhausen noise detection device according to claim 1, characterized in that: The detection magnetic sensitive coils (13) are in two groups and are symmetrically installed at the bottom of the crossbeam (12).

5. A miniaturized Barkhausen noise detection device according to claim 1, characterized in that: The telescopic component (14) is a telescopic cylinder. An operating handle (15) is provided on one side of the telescopic cylinder. The operating handle (15) is used to adjust the height of the telescopic cylinder.

6. A miniaturized Barkhausen noise detection device according to claim 1, characterized in that: The bottom of the base plate (1) is glued with an anti-skid pad.

7. A miniaturized Barkhausen noise detection device according to claim 1, characterized in that: The locking rod (3) is a structure of a nut and a stud, and the stud passes through the threaded holes of the clamping block (2) and the base plate (1) in sequence to fix the two.

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