CN114047465A - Amorphous alloy magnetostriction measurement method and device - Google Patents
Amorphous alloy magnetostriction measurement method and device Download PDFInfo
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- CN114047465A CN114047465A CN202111157760.XA CN202111157760A CN114047465A CN 114047465 A CN114047465 A CN 114047465A CN 202111157760 A CN202111157760 A CN 202111157760A CN 114047465 A CN114047465 A CN 114047465A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/18—Measuring magnetostrictive properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention relates to the technical field of electromagnetic measurement of transformers, in particular to a method and a device for measuring magnetostriction of amorphous alloy. The amorphous alloy magnetostriction measurement method provided by the invention overcomes the problem that the actual core magnetostriction cannot be accurately represented by the conventional single-chip magnetostriction measurement result, can simulate the magnetostriction characteristics of an amorphous distribution transformer core in different stress states, can realize the magnetostriction characteristic measurement in two directions, namely the magnetic conduction direction and the lamination direction, and provides data support for the vibration and noise suppression of the amorphous alloy distribution transformer.
Description
Technical Field
The invention relates to the technical field of electromagnetic measurement of transformers, in particular to a method and a device for measuring magnetostriction of amorphous alloy.
Background
The magnetostriction of the amorphous alloy strip is a main source of vibration and noise of the amorphous alloy distribution transformer, and the research on the magnetostriction characteristic of the amorphous alloy strip is of great significance for reducing the vibration and noise of the amorphous alloy distribution transformer. The existing research method mainly carries out research by measuring the magnetostriction characteristics of the single amorphous alloy, and has the problems that the difference of lamination structures of the single amorphous alloy and an actual transformer is large, and the magnetostriction characteristics measured by the single amorphous alloy cannot accurately represent the magnetostriction characteristics of an actual transformer core. Due to the lack of characteristic data capable of accurately representing the magnetostriction of the iron core structure, the vibration and noise of the amorphous alloy distribution transformer iron core are very difficult.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problem that the actual core magnetostriction cannot be accurately represented by the conventional single-chip magnetostriction measurement result in the prior art, so that the amorphous alloy magnetostriction measurement method and device are provided.
An amorphous alloy magnetostriction measurement method comprises the following steps:
winding a magnetic flux density measuring coil on an amorphous alloy laminated iron core, and arranging reflective sheets on the upper surface and at least one side surface of the amorphous alloy laminated iron core;
placing the amorphous alloy laminated iron core on a casting body containing a U-shaped magnetic yoke, wherein an exciting coil is wound on the U-shaped magnetic yoke, the amorphous alloy laminated iron core and the U-shaped magnetic yoke form a closed magnetic circuit, and then fixing one end of the amorphous alloy laminated iron core and installing a stress sensor at the other end of the amorphous alloy laminated iron core;
during measurement, applying tension or tension to the stress sensor, then transmitting a light signal to the reflector by using a transmitting light source, applying excitation voltage to the excitation coil, measuring the magnetic flux density in the amorphous alloy iron core lamination in real time through the magnetic flux density measuring coil, adjusting the excitation voltage until the magnetic flux density reaches a set value, and then measuring the change of reflected light on the reflector to obtain the magnetostriction of the amorphous alloy lamination iron core.
Optionally, the amorphous alloy laminated core is formed by stacking same strip-shaped amorphous alloy strips;
optionally, the amorphous alloy laminated core is formed by stacking same strip-shaped amorphous alloy strip strips in a vertical state.
Optionally, the length of the amorphous alloy laminated core is greater than that of the U-shaped magnetic yoke, and the width of the amorphous alloy laminated core is the same as that of the U-shaped magnetic yoke.
Optionally, the casting body containing the U-shaped magnetic yoke is a cuboid, and two identical end faces of the magnetic yoke at the opening of the U-shaped magnetic yoke and the upper surface of the casting body containing the U-shaped magnetic yoke are located on the same horizontal plane.
Optionally, the number of turns of the magnetic flux density measuring coil is more than or equal to 10 turns.
An amorphous alloy magnetostriction measurement device comprising:
the magnetic flux density measuring device comprises an amorphous alloy laminated iron core, a magnetic flux density measuring coil, a reflecting sheet, a magnetic flux density measuring coil, and a magnetic flux density measuring coil, an amorphous alloy laminated iron core, and a magnetic flux density measuring coil, wherein the upper surface and the surface of at least one side surface of an amorphous alloy laminated iron core are provided with the amorphous alloy laminated iron core;
the amorphous alloy laminated core is arranged on the casting body containing the U-shaped magnetic yoke, an exciting coil is wound on the U-shaped magnetic yoke, and the amorphous alloy laminated core and the U-shaped magnetic yoke form a closed magnetic circuit;
the supporting table is arranged on one side of the pouring body comprising the U-shaped magnetic yoke in the length direction, is detachably connected with one end of the amorphous alloy laminated iron core and is used for fixing the amorphous alloy laminated iron core;
the stress sensor is detachably connected with the other end of the amorphous alloy laminated core;
the laser reflection measurement vibration device comprises a first laser reflection measurement vibration device and a second laser reflection measurement vibration device, wherein the first laser reflection measurement vibration device is arranged on one side of the end part of the amorphous alloy laminated iron core far away from the stress sensor, and the second laser reflection measurement vibration device is arranged on one side of the side surface of the amorphous alloy laminated iron core; the first laser reflection measurement vibration device can emit optical signals to a reflector arranged on the side surface of the amorphous alloy laminated core; the second laser reflection measurement vibration device can emit optical signals to the reflection sheet arranged on the upper surface of the amorphous alloy lamination iron core.
Optionally, the laser reflection measurement vibration device is a laser vibration meter.
Optionally, the pouring body that includes U type yoke is the cuboid, two identical yoke terminal surfaces of U type yoke opening part with the upper surface that includes the pouring body of U type yoke is in on same horizontal plane.
Optionally, the amorphous alloy laminated core is formed by stacking same strip-shaped amorphous alloy strips;
optionally, the amorphous alloy laminated core is formed by stacking same strip-shaped amorphous alloy strip strips in a vertical state.
Optionally, the length of the amorphous alloy laminated core is greater than that of the U-shaped magnetic yoke, and the width of the amorphous alloy laminated core is the same as that of the U-shaped magnetic yoke.
Optionally, the number of turns of the magnetic flux density measuring coil is more than or equal to 10 turns.
Optionally, the stress sensor is detachably connected to the end of the amorphous alloy laminated core, and includes: the upper clamping plate and the lower clamping plate are arranged on the lower clamping plate, the upper clamping plate is arranged on the upper surface of the end portion of the amorphous alloy laminated core, the lower clamping plate is arranged on the lower surface of the end portion of the amorphous alloy laminated core, the back plate is in contact with the end face of the end portion of the amorphous alloy laminated core, the upper clamping plate and the lower clamping plate are detachably connected, and a stress sensor is arranged on one face, far away from the end face of the end portion of the amorphous alloy laminated core, of the back plate.
Optionally, the stress sensor is connected with a screw.
Optionally, the support frame is further included for supporting the screw rod.
The technical scheme of the invention has the following advantages:
1. the method and the device for measuring the magnetostriction of the amorphous alloy overcome the problem that the magnetostriction of an actual iron core cannot be accurately represented by the conventional single-chip magnetostriction measurement result, can simulate the magnetostriction characteristics of the iron core of the amorphous distribution transformer in different stress states, can realize the measurement of the magnetostriction characteristics in two directions, namely the magnetic conduction direction and the lamination direction, and provide data support for the vibration and noise suppression of the amorphous alloy distribution transformer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of an amorphous alloy magnetostriction measurement device provided in an embodiment of the present invention;
fig. 2 is a structural view of a casting body including a U-shaped yoke provided in an embodiment of the present invention;
fig. 3 is a structural view of a U-shaped yoke around which an excitation coil is wound, according to an embodiment of the present invention.
Description of reference numerals:
the method comprises the following steps of 1-an amorphous alloy laminated core, 2-a magnetic flux density measuring coil, 3-a reflector, 4-a casting body comprising a U-shaped magnetic yoke, 41-the U-shaped magnetic yoke, 42-an exciting coil, 5-a supporting table, 51-a fixing clamp plate, 52-a fastening bolt, 6-a stress sensor, 7-an upper clamp plate, 8-a lower clamp plate, 81-a back plate, 9-a laser vibration meter, 91-a first laser vibration meter, 92-a second laser vibration meter, 10-a screw rod, 11-a supporting frame and 12-a base.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides an amorphous alloy magnetostriction measurement device, as shown in fig. 1 to 3, including:
the magnetic flux density measuring device comprises an amorphous alloy laminated iron core 1, wherein a magnetic flux density measuring coil 2 is wound on the amorphous alloy laminated iron core 1, a reflector 3 is adhered to the upper surface of the amorphous alloy laminated iron core 1, and a reflector 3 is adhered to one side surface of the amorphous alloy laminated iron core;
a cast body 4 including a U-shaped yoke, as shown in fig. 2 to 3, an excitation coil 42 is wound on the U-shaped yoke 41 (the excitation coil 42 in fig. 3 is schematically illustrated), and along the length direction, the amorphous alloy laminated core 1 is placed on the upper surface of the cast body 4 including the U-shaped yoke to form a closed magnetic circuit with the U-shaped yoke 41;
the supporting table 5 is arranged on one side of the casting body 4 comprising the U-shaped magnetic yoke, is detachably connected with one end of the amorphous alloy laminated iron core 1, and is used for fixing the amorphous alloy laminated iron core 1 without shielding the end face of the amorphous alloy laminated iron core 1 so as to prevent the first laser vibration meter 91 from being incapable of receiving light changes reflected by the side surface adhered with the reflector 3;
the stress sensor 6 is detachably connected with the other end of the amorphous alloy laminated core 1, in the embodiment, the detachable connection mode is that an upper clamping plate 7 is arranged on the upper surface of the end part of the amorphous alloy laminated core 1, a lower clamping plate 8 is arranged on the lower surface of the end part of the amorphous alloy laminated core 1, the lower clamping plate 8 is provided with a back plate 81, the back plate 81 is in contact with the end face of the end part of the amorphous alloy laminated core 1, and the stress sensor 6 is arranged on one side, away from the end face of the end part of the amorphous alloy laminated core 1, of the back plate 81;
the laser reflection measurement vibration device selects a laser vibration meter 9 in the embodiment, and comprises a first laser vibration meter 91 and a second laser vibration meter 92, wherein the first laser vibration meter 91 is arranged at one side of the end part of the amorphous alloy laminated core far away from the stress sensor, the first laser vibration meter 91 can emit optical signals to the reflective sheet 3 arranged on the side surface of the amorphous alloy laminated core, in the embodiment, the first laser vibration meter 91 can be arranged at the end part of the amorphous alloy laminated core close to the side surface of the adhesive reflective sheet 3, so that the first laser vibration meter 91 can emit optical signals to the reflective sheet 3 arranged on the side surface of the amorphous alloy laminated core, the second laser vibration meter 92 is arranged at one side of the side surface of the amorphous alloy laminated core 1, the second laser vibration meter 92 can emit optical signals to the reflective sheet 3 arranged on the upper surface of the amorphous alloy laminated core 1, and in the embodiment, the second laser vibration meter 92 can be arranged slightly on the upper surface of the amorphous alloy laminated core 1.
In the above apparatus, during measurement, a set tension or tension (which may be adjusted according to an example) is applied to one end of an amorphous alloy laminated core 1 on which a stress sensor 6 is mounted, a laser vibration meter 9 located at an end portion and a side surface of the amorphous alloy laminated core 1 is opened to transmit infrared signals to a reflective sheet 3 located at an upper surface and a side surface of the amorphous alloy laminated core 1, wherein a first laser vibration meter 91 is formed in a group with the reflective sheet 3 located at the side surface of the amorphous alloy laminated core 1 to measure magnetostriction generated in a magnetic path direction on a wide surface of the amorphous alloy laminated core, a second laser vibration meter 92 is formed in a group with the reflective sheet 3 located at the upper surface of the amorphous alloy laminated core 1 to measure magnetostriction in the amorphous alloy laminated direction, an excitation voltage is applied to an excitation coil 42 on a U-shaped yoke 41, and a magnetic flux density in the amorphous alloy laminated core 1 is measured in real time by a magnetic flux density measuring coil 2, the excitation voltage is adjusted until the magnetic flux density reaches a set value, the amorphous alloy laminated iron core 1 generates a magnetostriction effect under the action of a magnetic field, the laser vibration meter 9 is used for measuring the change of reflected light of the reflector 3 to obtain the magnetostriction quantity of the amorphous laminated iron core 1, the problem that the actual magnetostriction of the iron core cannot be accurately represented by the conventional single-chip magnetostriction measurement result is solved, the magnetostriction characteristics of the amorphous distribution transformer iron core in different stress states can be simulated, the measurement of the magnetostriction characteristics of the amorphous alloy iron core in two directions, namely the magnetic path direction and the lamination direction, on the wide surface of the amorphous alloy iron core can be realized, and data support is provided for the vibration and noise suppression of the amorphous alloy distribution transformer.
In this embodiment, the amorphous alloy laminated core 1 is formed by stacking a plurality of identical strip-shaped amorphous alloy strips, and as a more preferable embodiment, the amorphous alloy laminated core is formed by stacking identical strip-shaped amorphous alloy strips in an upright state (as shown in fig. 1, which is a simplified drawing method), so that a magnetic field generated by the magnetic yoke enters from a narrow side of each amorphous alloy strip, and the magnetic field is prevented from directly entering a wide side of the amorphous alloy strip to generate a larger eddy current effect and generate an obstruction effect on the magnetic field generated by the magnetic yoke.
As a preferred embodiment, the length of the amorphous alloy laminated core 1 is greater than that of the U-shaped yoke, the width of the amorphous alloy laminated core 1 is the same as that of the U-shaped yoke 41, and the width is the same, so that the magnetic field of the whole magnetic circuit is in an optimal state, if the width is smaller than that of the U-shaped yoke, unnecessary magnetic leakage is generated at the redundant yoke part, which affects the magnetic field uniformity of the amorphous alloy strip to be detected, and if the width exceeds that of the U-shaped yoke, no magnetic field passes through the amorphous alloy strip beyond the yoke part, which is in an idle state, and unnecessary waste is generated.
In a preferred embodiment, the number of turns of the magnetic flux density measuring coil 2 is equal to or greater than 10 turns, and the number of turns of the magnetic flux density measuring coil 2 is large, so that the induced voltage is large, and therefore, the number of turns of the magnetic flux density measuring coil is preferably equal to or greater than 10 turns, so that the voltage signal generated by the measuring coil is prevented from being too small, being easily interfered and affecting the measuring precision.
In this embodiment, the amorphous alloy laminated core 1 is prepared by an amorphous alloy distribution transformer process, and mainly includes two steps: firstly, the cut amorphous alloy strip is stacked and formed, and secondly, the amorphous alloy strip is solidified into an integral amorphous alloy laminated core through epoxy resin impregnation, so that the amorphous alloy laminated core 1 is manufactured.
In this embodiment, as shown in fig. 2 to 3, the casting body 4 including the U-shaped yoke is a rectangular parallelepiped, and two identical yoke end surfaces at the opening of the U-shaped yoke 41 are located on the same horizontal plane as the upper surface of the casting body 4 including the U-shaped yoke. The casting body 4 containing the U-shaped magnetic yoke is prepared according to a conventional method, and specifically comprises the following steps: the U-shaped yoke 41 wound with the excitation coil 42 is placed in a rectangular parallelepiped mold, two completely identical yoke end faces at an opening of the U-shaped yoke 41 are flush with the upper surface of the rectangular parallelepiped mold, then epoxy resin is poured into the mold, and the mold is removed after casting molding to form a cast body, and finally as shown in fig. 2. The potting surrounding the outside of the U-shaped yoke 41 with the excitation coil 42 (potting 4 containing the U-shaped yoke) serves two purposes: firstly, improve the mechanical strength of yoke with the shaping of U type yoke 41 casting, secondly the pouring body of formation can play the effect that supports surveyed amorphous alloy laminated core 1, avoids U type yoke to receive great pressure effect, and the performance changes and influences measuring result.
As a modified embodiment, one end of the amorphous alloy laminated core 1 is placed on the supporting table 5 and detachably connected to the supporting table 5, in this embodiment, a fixing clamp plate 51 is disposed on the upper surface of the end of one end of the amorphous alloy laminated core 1, and the fixing clamp plate 51 is connected to the supporting table 5 through a fastening bolt 52 to clamp one end of the amorphous alloy laminated core 1.
In a modified embodiment, the supporting platform 5 and the casting body 4 including the U-shaped magnetic yoke are fixed with a base 12 below.
As a modified embodiment, a screw 10 is connected to a side of the stress sensor 6 away from the back plate 81, the screw 10 is a rotating screw, the screw 10 is supported by a fixed support frame 11, and the support frame 11 is disposed on the base 12.
The invention provides an amorphous alloy magnetostriction measuring method, which is characterized in that a plurality of amorphous alloys to be measured are stacked by utilizing the amorphous alloy magnetostriction measuring device, 2500 same strip-shaped amorphous alloy strips are selected to be vertically stacked to form an amorphous alloy laminated iron core 1 in the embodiment, the length of the amorphous alloy laminated iron core 1 is larger than that of a U-shaped magnetic yoke 41, the width of the amorphous alloy laminated iron core 1 is the same as that of the U-shaped magnetic yoke 41, a magnetic flux density measuring coil 2 (the number of turns is more than or equal to 10 turns) is wound on the amorphous alloy laminated iron core 1, a reflecting sheet 3 is adhered to the upper surface of the amorphous alloy laminated iron core 1, a reflecting sheet 3 is adhered to one side surface of the amorphous alloy laminated iron core 1, then the amorphous alloy magnetostriction measuring device is installed, as shown in figures 1-2, when in measurement, an excitation voltage is applied to an excitation coil 42, the magnetic flux density in the amorphous alloy laminated core 1 is measured in real time by the magnetic flux density measuring coil 2, and the excitation voltage is adjusted until the magnetic flux density reaches a set value (which can be adjusted according to the example, for example, 1.0T, 1.2T. The amorphous alloy laminated iron core 1 generates a magnetostriction effect under the action of a magnetic field, and the variation of light reflected by the reflector is sensed by the first laser vibration meter 91 and the second laser vibration meter 92 at the end part and the side surface of the amorphous alloy laminated iron core 1, so that the magnetostriction of the amorphous laminated iron core 1 in the magnetic conduction direction and the lamination direction is measured.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An amorphous alloy magnetostriction measurement method is characterized by comprising the following steps:
winding a magnetic flux density measuring coil on an amorphous alloy laminated iron core, and arranging reflective sheets on the upper surface and at least one side surface of the amorphous alloy laminated iron core;
placing the amorphous alloy laminated iron core on a casting body containing a U-shaped magnetic yoke, wherein an exciting coil is wound on the U-shaped magnetic yoke, the amorphous alloy laminated iron core and the U-shaped magnetic yoke form a closed magnetic circuit, and then fixing one end of the amorphous alloy laminated iron core and installing a stress sensor at the other end of the amorphous alloy laminated iron core;
during measurement, applying tension or tension to the stress sensor, then transmitting a light signal to the reflector by using a transmitting light source, applying excitation voltage to the excitation coil, measuring the magnetic flux density in the amorphous alloy iron core lamination in real time through the magnetic flux density measuring coil, adjusting the excitation voltage until the magnetic flux density reaches a set value, and then measuring the change of reflected light on the reflector to obtain the magnetostriction of the amorphous alloy lamination iron core.
2. The method for measuring the magnetostrictive characteristic of the amorphous alloy according to claim 1, wherein the amorphous alloy laminated core is formed by stacking identical strip-shaped amorphous alloy strips;
optionally, the amorphous alloy laminated core is formed by stacking same strip-shaped amorphous alloy strip strips in a vertical state.
3. The amorphous alloy magnetostrictive characteristic measurement method according to claim 1 or 2, wherein the length of the amorphous alloy laminated core is greater than the length of the U-shaped yoke, and the width of the amorphous alloy laminated core is the same as the width of the U-shaped yoke.
4. The method for measuring the magnetostriction characteristics of the amorphous alloy according to claim 1 or 2, wherein the casting body containing the U-shaped magnetic yoke is a rectangular parallelepiped, and two identical yoke end surfaces at the opening of the U-shaped magnetic yoke and the upper surface of the casting body containing the U-shaped magnetic yoke are located on the same horizontal plane.
5. The method for measuring the magnetostriction property of the amorphous alloy according to claim 1 or 2, wherein the number of turns of the magnetic flux density measuring coil is not less than 10 turns.
6. An amorphous alloy magnetostriction measurement device, comprising:
the magnetic flux density measuring device comprises an amorphous alloy laminated iron core, a magnetic flux density measuring coil, a reflecting sheet, a magnetic flux density measuring coil, and a magnetic flux density measuring coil, an amorphous alloy laminated iron core, and a magnetic flux density measuring coil, wherein the upper surface and the surface of at least one side surface of an amorphous alloy laminated iron core are provided with the amorphous alloy laminated iron core;
the amorphous alloy laminated core is arranged on the casting body containing the U-shaped magnetic yoke, an exciting coil is wound on the U-shaped magnetic yoke, and the amorphous alloy laminated core and the U-shaped magnetic yoke form a closed magnetic circuit;
the supporting table is arranged on one side of the pouring body comprising the U-shaped magnetic yoke in the length direction, is detachably connected with one end of the amorphous alloy laminated iron core and is used for fixing the amorphous alloy laminated iron core;
the stress sensor is detachably connected with the other end of the amorphous alloy laminated core;
the laser reflection measurement vibration device comprises a first laser reflection measurement vibration device and a second laser reflection measurement vibration device, wherein the first laser reflection measurement vibration device is arranged on one side of the end part of the amorphous alloy laminated iron core far away from the stress sensor, and the second laser reflection measurement vibration device is arranged on one side of the side surface of the amorphous alloy laminated iron core; the first laser reflection measurement vibration device can emit optical signals to a reflector arranged on the side surface of the amorphous alloy laminated core; the second laser reflection measurement vibration device can emit optical signals to the reflection sheet arranged on the upper surface of the amorphous alloy lamination iron core.
7. The amorphous alloy magnetostriction measurement device according to claim 6, wherein the casting body containing the U-shaped magnetic yoke is a cuboid, and two identical yoke end faces at the opening of the U-shaped magnetic yoke and the upper surface of the casting body containing the U-shaped magnetic yoke are located on the same horizontal plane;
optionally, the amorphous alloy laminated core is formed by stacking same strip-shaped amorphous alloy strips;
optionally, the amorphous alloy laminated core is formed by stacking same strip-shaped amorphous alloy strip strips in a vertical state.
Optionally, the length of the amorphous alloy laminated core is greater than that of the U-shaped magnetic yoke, and the width of the amorphous alloy laminated core is the same as that of the U-shaped magnetic yoke;
optionally, the number of turns of the magnetic flux density measuring coil is more than or equal to 10 turns.
8. An amorphous alloy magnetostriction measurement device according to claim 6 or 7, wherein said stress sensor is detachably connected to an end portion of the amorphous alloy laminated core, and comprises: the upper clamping plate and the lower clamping plate are arranged on the lower clamping plate, the upper clamping plate is arranged on the upper surface of the end portion of the amorphous alloy laminated core, the lower clamping plate is arranged on the lower surface of the end portion of the amorphous alloy laminated core, the back plate is in contact with the end face of the end portion of the amorphous alloy laminated core, the upper clamping plate and the lower clamping plate are detachably connected, and a stress sensor is arranged on one face, far away from the end face of the end portion of the amorphous alloy laminated core, of the back plate.
9. The amorphous alloy magnetostriction measurement device according to claim 8, wherein a screw is connected to the stress sensor.
10. The amorphous alloy magnetostriction measurement device according to claim 9, further comprising a support for supporting the screw.
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