Stage and system for magnetoacoustic signal detection

Abstract

An embodiment of the present invention discloses a stage and a system for magnetoacoustic signal detection. The stage for magnetoacoustic signal detection includes a sample plate, a shielding plate, a rotating plate, and support columns; one end of each support column is vertically fixed on the rotating plate, and the other end of each support column is vertically fixed on the sample plate. The shielding plate is parallel to the rotating plate and nested on the support columns; the rotating plate is used to drive the sample plate and the shielding plate to rotate through the support columns, and the shielding plate is used to shield the magnetic field generated in the support columns; the sample plate is used to place a sample and apply an excitation current to the sample. The designed stage for magnetoacoustic signal detection in this solution can drive the sample to rotate and provide a stable excitation current to the sample during rotation, reducing the interference of the magnetic field generated by the transmitted excitation current on the magnetoacoustic signal detection.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of medical imaging technology, and in particular, to a stage and a system for magnetoacoustic signal detection. Background Art

[0002] Magnetoacoustic signals can reflect the internal electrical properties of tissue samples, thereby providing a basis for disease diagnosis. When performing imaging detection, it is usually necessary to perform circular scanning on tissue samples. However, in the injection-type magnetoacoustic imaging method, a fixed probe is usually used to detect a rotating sample, that is, the sample needs to rotate together with the excitation electrode. When the sample and the excitation electrode rotate together, the wires connected to the excitation electrode will be wound together, resulting in the displacement of the excitation electrode, which affects the stable excitation current applied to the sample. The excitation current transmitted in the wires will generate a magnetic field, which affects the detection probe to receive magnetoacoustic signals. Summary of the Invention

[0003] The embodiments of the present invention provide a stage and a system for magnetoacoustic signal detection, so as to drive the sample to rotate, and can provide a stable excitation current to the sample during rotation, and reduce the interference of the magnetic field generated by the transmitted excitation current on the magnetoacoustic signal detection.

[0004] The embodiments of the present invention provide a stage for magnetoacoustic signal detection, which includes a stage plate, a shielding plate, a rotating plate and a support column;

[0005] One end of the support column is vertically fixed on the rotating plate, the other end of the support column is vertically fixed on the stage plate, the shielding plate is parallel to the rotating plate, and the shielding plate is nested on the support column;

[0006] The rotating plate is used to drive the stage plate and the shielding plate to rotate through the support column, the shielding plate is used to shield the magnetic field generated in the support column; the stage plate is used to place the sample and apply an excitation current to the sample.

[0007] Optionally, the stage for magnetoacoustic signal detection further includes a sample excitation source;

[0008] The sample excitation source includes a connection wire, a first excitation electrode and a second excitation electrode;

[0009] The connection wire is connected to the first excitation electrode and the second excitation electrode, and the connection wire is used to transmit the excitation current to the first excitation electrode and the second excitation electrode.

[0010] Optionally, the column body of the support column includes a wire inlet hole and a wire outlet hole;

[0011] The wire inlet hole is located between the shielding plate and the rotating plate, and the wire outlet hole is located between the shielding plate and the stage plate;

[0012] The connection wire passes through the support column from the wire inlet hole, and the connection wire passes through the wire outlet hole and is connected to the first excitation electrode and the second excitation electrode.

[0013] Optionally, the carrier plate includes a first through hole and a second through hole;

[0014] The support column is hollow inside, and the wire outlet holes include a first wire outlet hole and a second wire outlet hole;

[0015] One wire of the connecting wire passes through the first wire outlet hole and is connected to the first excitation electrode, and the other wire of the connecting wire passes through the second wire outlet hole and is connected to the second excitation electrode;

[0016] The first excitation electrode is installed in the first through hole, and the second excitation electrode is installed in the second through hole.

[0017] Optionally, the shielding plate includes a shielding support plate, a magnetic shielding layer and a sound shielding layer;

[0018] The magnetic shielding layer and the sound shielding layer are disposed on any surface of the shielding support plate parallel to the rotating plate.

[0019] Optionally, the rotating plate further includes a pointer;

[0020] The side surface of the rotating plate perpendicular to the horizontal direction further includes an angle scale;

[0021] The pointer is used to indicate the rotation angle of the rotating plate according to the angle scale.

[0022] Optionally, the shielding plate is close to or in contact with the carrier plate.

[0023] Optionally, the materials used for the carrier plate, the shielding plate, the rotating plate and the support column include acrylic materials.

[0024] In a second aspect, an embodiment of the present invention further provides a system for magnetoacoustic signal detection, which includes a carrier stage, a motor module, an excitation device, a magnetic field device and a detection device for magnetoacoustic signal detection according to any one of the above embodiments;

[0025] The excitation device is used to provide an excitation current to the carrier plate;

[0026] The motor module is used to drive the rotating plate to rotate;

[0027] The magnetic field device is used to provide a static magnetic field to the sample;

[0028] The detection device is used to detect the magnetoacoustic signal generated by the sample when an excitation current is applied in the static magnetic field.

[0029] Optionally, the magnetic field device is parallel to the rotating plate, and the magnetic field device is nested on the support column;

[0030] The magnetic field device is disposed between the shielding plate and the carrier plate, or between the shielding plate and the rotating plate.

[0031] In an embodiment of the present invention, one end of a support column is vertically fixed on a rotating disk, the other end of the support column is vertically fixed on a loading disk, a shielding disk is parallel to the rotating disk, and the shielding disk is nested on the support column. The support column can transmit an excitation current to the loading disk, so that the loading disk can apply an excitation current to the sample while carrying the sample. The rotating disk can drive the loading disk and the shielding disk to rotate through the support column, so that all parts on the entire loading platform are relatively stationary, and thus the loading disk can provide a stable excitation current to the sample during rotation. The shielding disk can shield the magnetic field generated by the transmission of the excitation current in the support column, thereby reducing the interference of the magnetic field generated by the transmission of the excitation current on the magnetoacoustic signal detection. In summary, the loading platform designed in this solution for magnetoacoustic signal detection can drive the sample to rotate, and can provide a stable excitation current to the sample during rotation, reducing the interference of the magnetic field generated by the transmission of the excitation current on the magnetoacoustic signal detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some specific embodiments of the present invention. For those skilled in the art, according to the basic concepts of the device structures, driving methods, and manufacturing methods disclosed and prompted by various embodiments of the present invention, they can be extended and extended to other structures and drawings. Undoubtedly, these should all be within the scope of the claims of the present invention.

[0033] Figure 1 It is a schematic structural diagram of a loading platform for magnetoacoustic signal detection provided by an embodiment of the present invention;

[0034] Figure 2 It is a schematic structural diagram of a sample excitation source provided by an embodiment of the present invention;

[0035] Figure 3 It is a schematic structural diagram of a support column provided by an embodiment of the present invention;

[0036] Figure 4 It is a schematic structural diagram of a loading disk provided by an embodiment of the present invention;

[0037] Figure 5 It is a cross-sectional view of a shielding disk provided by an embodiment of the present invention;

[0038] Figure 6 It is a cross-sectional view of another shielding disk provided by an embodiment of the present invention;

[0039] Figure 7 It is a cross-sectional view of another shielding disk provided by an embodiment of the present invention;

[0040] Figure 8Schematic structural diagram of a stage for magnetoacoustic signal detection provided by an embodiment of the present invention;

[0041] Figure 9 Schematic structural diagram of a system for magnetoacoustic signal detection provided by an embodiment of the present invention;

[0042] Figure 10 Schematic structural diagram of another system for magnetoacoustic signal detection provided by an embodiment of the present invention. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] An embodiment of the present invention provides a stage for magnetoacoustic signal detection, Figure 1 Schematic structural diagram of a stage for magnetoacoustic signal detection provided by an embodiment of the present invention. As Figure 1 shown, the stage for magnetoacoustic signal detection includes a sample stage 110, a shielding disk 120, a rotating disk 130, and support columns 140; one end of each support column 140 is vertically fixed to the rotating disk 130, and the other end of each support column 140 is vertically fixed to the sample stage 110. The shielding disk 120 is parallel to the rotating disk 130 and is nested on the support columns 140; the rotating disk 130 is used to drive the sample stage 110 and the shielding disk 120 to rotate through the support columns 140, and the shielding disk 120 is used to shield the magnetic field generated in the support columns 140; the sample stage 110 is used to place a sample and apply an excitation current to the sample.

[0045] Among them, during the circular scanning of the sample, the sample needs to rotate under the condition of being energized to facilitate the acquisition of magnetoacoustic signals generated in different regions of the sample. The stage for magnetoacoustic signal detection mainly has two functions: 1) Apply an excitation current to the sample to energize the sample. 2) Drive the sample to rotate. 3) Reduce the interference factors affecting magnetoacoustic signal detection (for example, the magnetic field generated by the transmitted excitation current or the inability to apply a stable excitation current to the sample) during the process of driving the sample to rotate.

[0046] Specifically, the stage for magnetoacoustic signal detection mainly includes a stage plate 110, a shielding plate 120, a rotating plate 130, and support columns 140. One end of the support column 140 is vertically fixed to the rotating plate 130, and the other end of the support column 140 is vertically fixed to the stage plate 110. The shielding plate 120 is parallel to the rotating plate 130, and the shielding plate 120 is nested on the support column 140. Among them, the rotating plate 130 is the base plate of the entire stage and is the power source of the entire stage. Exemplarily, the rotating plate 130 can be connected to the motor module and rotate following the motor module, thereby driving the rotation of the entire stage. The support column 140 is the support connection bridge of the entire stage, vertically supporting the stage plate 110 and the shielding plate 120, so that the rotating plate 130 can drive the stage plate 110 and the shielding plate 120 to rotate through the support column 140. In addition, the support column 140 can transmit the excitation current to the stage plate 110, so that the stage plate 110 can load the excitation current to the sample while carrying the sample. When the rotating plate 130 drives the stage plate 110 and the shielding plate 120 to rotate through the support column 140, all parts on the entire stage are relatively stationary, so that the stage can provide a stable excitation current to the sample. When the support column 140 transmits the excitation current to the stage plate 110, a magnetic field will be generated. The shielding plate 120 can shield the magnetic field generated in the support column 140 and reduce the interference of the magnetic field generated by the transmission of the excitation current in the support column 140 on the magnetoacoustic signal detection.

[0047] In the embodiment of the present invention, one end of the support column is vertically fixed to the rotating plate, the other end of the support column is vertically fixed to the stage plate, the shielding plate is parallel to the rotating plate, and the shielding plate is nested on the support column. The support column can transmit the excitation current to the stage plate, so that the stage plate can load the excitation current to the sample while carrying the sample. The rotating plate can drive the stage plate and the shielding plate to rotate through the support column, so that all parts on the entire stage are relatively stationary, so that the stage plate can provide a stable excitation current to the sample during rotation. The shielding plate can shield the magnetic field generated in the support column due to the transmission of the excitation current, thereby reducing the interference of the magnetic field generated by the transmission of the excitation current on the magnetoacoustic signal detection. It can be seen that the stage for magnetoacoustic signal detection designed by this solution can drive the sample to rotate, and can provide a stable excitation current to the sample during the rotation of the sample, reducing the interference of the magnetic field generated by the transmission of the excitation current on the magnetoacoustic signal detection.

[0048] Figure 2 It is a schematic structural diagram of a sample excitation source provided by an embodiment of the present invention. Refer to Figure 1 - Figure 2 , the stage for magnetoacoustic signal detection further includes a sample excitation source 150; the sample excitation source 150 includes a connection line 151, a first excitation electrode 152, and a second excitation electrode 153; the connection line 151 is connected to the first excitation electrode 152 and the second excitation electrode 153, and the connection line 151 is used to transmit the excitation current to the first excitation electrode 152 and the second excitation electrode 153.

[0049] Among them, the stage for magnetoacoustic signal detection further includes a sample excitation source. The sample excitation source 150 includes a connection wire 151 for transmitting an excitation current, a first excitation electrode 152 and a second excitation electrode 153 for applying an excitation current to the sample. Specifically, the connection wire 151 of the sample excitation source 150 is arranged inside the support column 140, and thus a magnetic field caused by the excitation current will be generated inside the support column 140. The first excitation electrode 152 and the second excitation electrode 153 of the sample excitation source 150 are arranged on the stage, so that while the sample stage 110 carries the sample, an excitation current can be applied to the sample.

[0050] Figure 3 It is a schematic structural diagram of a support column provided by an embodiment of the present invention. Refer to Figure 1 - Figure 3 , the column body of the support column 140 includes a wire inlet hole 141 and a wire outlet hole 142; the wire inlet hole 141 is located between the shielding disk 120 and the rotating disk 130, and the wire outlet hole 142 is located between the shielding disk 120 and the sample stage 110; the connection wire 151 penetrates into the support column 140 from the wire inlet hole 141, and the connection wire 151 passes out of the wire outlet hole 142 and is connected to the first excitation electrode 152 and the second excitation electrode 153.

[0051] Among them, the column body of the support column 140 includes a wire inlet hole 141 and a wire outlet hole 142. The wire inlet is a small hole through which the connection wire 151 penetrates into the interior of the support column 140, and the wire outlet hole 142 is a small hole through which the connection wire 151 passes out of the interior of the support column 140. Specifically, the wire inlet hole 141 is located between the shielding disk 120 and the rotating disk 130. The wire inlet hole 141 can be at a position of the support column 140 close to the rotating disk 130, thereby reducing the connection wire 151 exposed outside the support column 140. The wire outlet hole 142 is located between the shielding disk 120 and the sample stage 110, and the connection wire 151 passes out of the wire outlet hole 142 and is connected to the first excitation electrode 152 and the second excitation electrode 153. It can be seen from this that both the part of the connection wire 151 that enters the support column 140 from the wire inlet hole 141 and the part that passes out of the wire outlet hole 142 of the support column 140 will rotate together with the rotating disk 130, that is, the part of the connection wire 151 that enters the support column 140 from the wire inlet hole 141 and the part that passes out of the wire outlet hole 142 of the support column 140 remain relatively stationary during the rotation of the rotating disk 130. Thereby, it is possible to avoid the connection wires 151 passing out of the wire outlet hole 142 of the support column 140 from being wound together, and further avoid the problem that the displacement of the first excitation electrode 152 and the second excitation electrode 153 is caused by the entanglement of the connection wires 151 passing out of the wire outlet hole 142 of the support column 140, further ensuring that the sample stage 110 can provide a stable excitation current to the sample during rotation.

[0052] Figure 4A structural schematic diagram of a loading tray provided by an embodiment of the present invention. Refer to Figure 1 - Figure 4 , the loading tray 110 includes a first through hole 111 and a second through hole 112; the support column 140 is hollow inside, and the wire outlet holes 142 include a first wire outlet hole 1421 and a second wire outlet hole 1422; one wire of the connecting wire 151 passes through the first wire outlet hole 1421 and is connected to the first excitation electrode 152, and the other wire of the connecting wire 151 passes through the second wire outlet hole 1422 and is connected to the second excitation electrode 153; the first excitation electrode 152 is installed in the first through hole 111, and the second excitation electrode 153 is installed in the second through hole 112.

[0053] Among them, the support column 140 is hollow inside, which is convenient for the connecting wire 151 to penetrate into the inside of the support column 140 from the wire inlet hole 141. There are two wire outlet holes 142 on the support column 140, namely the first wire outlet hole 1421 and the second wire outlet hole 1422. The connecting wire 151 can be a twisted pair. One wire in the twisted pair can pass through the first wire outlet hole 1421 and be connected to the first excitation electrode 152, and the first excitation electrode 152 can be installed in the first through hole 111 of the loading tray 110. The other wire of the twisted pair passes through the second wire outlet hole 1422 and is connected to the second excitation electrode 153, and the second excitation electrode 153 can be installed in the second through hole 112 of the loading tray 110. Thus, when the sample is placed on the loading tray 110, as long as the sample is in contact with the areas of the loading tray 110 where the first excitation electrode 152 and the second excitation electrode 153 are installed, the excitation current can be applied to the sample.

[0054] Figure 5 A cross-sectional view of a shielding tray provided by an embodiment of the present invention, Figure 6 Another cross-sectional view of a shielding tray provided by an embodiment of the present invention, Figure 7 Another cross-sectional view of a shielding tray provided by an embodiment of the present invention, as Figure 5 - Figure 7 shown, the shielding tray includes a shielding support tray 121, a magnetic shielding layer 122 and a sound shielding layer 123; the magnetic shielding layer 122 and the sound shielding layer 123 are provided on any surface of the shielding support tray 121 parallel to the rotating tray.

[0055] Among them, the shielding disk is composed of a shielding support disk 121, a magnetic shielding layer 122, and an acoustic shielding layer 123 stacked together. Specifically, the shielding support disk 121 is the carrier for supporting the magnetic shielding layer 122 and the acoustic shielding layer 123. The magnetic shielding layer 122 can shield the magnetic field in the area below the position of the shielding disk. For example, the magnetic shielding layer 122 can shield the magnetic field generated by the excitation current transmitted by the connecting wire inside the support column below the position of the shielding disk, so as to avoid the magnetic field generated by the excitation current transmitted by the connecting wire inside the support column below the shielding disk from affecting the sample in the sample disk above the shielding disk. The acoustic shielding layer 123 can absorb the noise in the area below the position of the shielding disk. For example, the acoustic shielding layer 123 can absorb the current noise generated by the excitation current transmitted by the connecting wire inside the support column below the position of the shielding disk, so as to avoid the current noise generated by the excitation current transmitted by the connecting wire inside the support column below the shielding disk from affecting the sample in the sample disk above the shielding disk.

[0056] It should be noted that the magnetic shielding layer 122 and the acoustic shielding layer 123 are arranged on any surface of the shielding support disk 121 parallel to the rotating disk, Figure 5 - Figure 7 which is only an exemplary schematic diagram of the stacked structure of the shielding support disk 121, the magnetic shielding layer 122, and the acoustic shielding layer 123, and this solution does not limit this.

[0057] Figure 8 This is a schematic structural diagram of a stage for magneto-acoustic signal detection provided by an embodiment of the present invention. As Figure 8 shown, the rotating disk 130 further includes a pointer 131; the side surface of the rotating disk 130 perpendicular to the horizontal direction further includes an angle scale; the pointer 131 is used to indicate the rotation angle of the rotating disk 130 according to the angle scale.

[0058] Among them, the side surface of the rotating disk 130 perpendicular to the horizontal direction further includes an angle scale, and at the initial zero position of the angle scale of the rotating disk 130, there is also a pointer 131 indicating the angle scale. During the rotation of the rotating disk 130, the rotation angle of the rotating disk 130 can be obtained by the specific position of the pointer 131 indicating the angle scale. That is, the rotation angle of the rotating disk 130 can be obtained in real time through the pointer 131 and the angle scale.

[0059] Optionally, the shielding disk is close to or in contact with the sample disk.

[0060] Among them, the wire outlet hole of the support column is located between the loading tray and the shielding disk. When the connecting wire passes through the wire outlet hole and is connected to the first excitation electrode and the second excitation electrode, a magnetic field will be generated when the connecting wire transmits the excitation current to the first excitation electrode and the second excitation electrode. Since the shielding disk cannot shield the magnetic field and current noise generated by the transmission of the excitation current of the connecting wire in the area above it, the closer the position where the shielding disk is nested on the support column is to the loading tray, the shorter the connecting wire in the area above the shielding disk, and the weaker the magnetic field and current noise generated by the connecting wire in the area above the shielding disk. Furthermore, the influence of the magnetic field and current noise generated by the connecting wire in the area above the shielding disk on the sample in the loading tray is smaller.

[0061] Optionally, the materials used for the loading tray, the shielding disk, the rotating disk, and the support column include acrylic materials.

[0062] Among them, acrylic materials have strong plasticity and are easy to process. Acrylic materials have the characteristics of not conducting electricity, not conducting magnetism, and not affecting the detection of magnetoacoustic signals. In addition, acrylic materials also have good transparency and are easy to dye. Therefore, the loading tray, the shielding disk, the rotating disk, and the support column are made of acrylic materials, which are easy to manufacture, do not affect the detection of magnetoacoustic signals, and the designed loading platform also has aesthetic properties.

[0063] Figure 9 It is a schematic structural diagram of a system for magnetoacoustic signal detection provided by an embodiment of the present invention. As Figure 9 shown, the system for magnetoacoustic signal detection includes a loading platform for magnetoacoustic signal detection, a motor module 200, an excitation device 300, a magnetic field device 400, and a detection device 500; the excitation device 300 is used to provide an excitation current to the loading tray 110; the motor module 200 is used to drive the rotating disk 130 to rotate; the magnetic field device 400 is used to provide a static magnetic field to the sample; the detection device 500 is used to detect the magnetoacoustic signal generated by the sample when an excitation current is applied in the static magnetic field.

[0064] Specifically, the excitation device 300 is connected to the support column 140, and the excitation device 300 can provide an excitation current to the loading tray 110 through the support column 140. The motor module 200 is connected to the rotating disk 130. For example, the electrode module can be connected to the rotating disk 130 through a belt or a gear to drive the rotating disk 130 to rotate 360°. The magnetic field device 400 is used to provide a static magnetic field to the sample, and the direction of the static magnetic field provided by the magnetic field device 400 to the sample is perpendicular to the current direction. The detection device 500 is used to detect the magnetoacoustic signal generated by the sample when an excitation current is applied in the static magnetic field, so as to image according to the magnetoacoustic signal reflecting the electrical characteristics inside the sample, thereby providing a basis for diagnosing diseases.

[0065] In addition, the system for magnetoacoustic signal detection includes the stage for magnetoacoustic signal detection provided in any embodiment of the present invention, and thus has the beneficial effects of the stage for magnetoacoustic signal detection provided in the embodiments of the present invention, which will not be elaborated here.

[0066] Optionally, the magnetic field device is parallel to the rotating disk, and the magnetic field device is nested on the support column; the magnetic field device is arranged between the shielding disk and the sample disk, or between the shielding disk and the rotating disk.

[0067] Wherein, the magnetic field device can adopt a magnet. When the magnet is parallel to the rotating disk and nested on the support column, it can ensure that the direction of the static magnetic field provided by the magnet to the sample is perpendicular to the direction of the current.

[0068] Exemplarily, Figure 10 is a schematic structural diagram of another system for magnetoacoustic signal detection provided in an embodiment of the present invention. As Figure 10 shown, when the magnetic field device 400 adopts a magnet, the magnet is parallel to the rotating disk 130 and nested on the support column 140. It can be arranged between the shielding disk 120 and the sample disk 110, so that the direction of the static magnetic field provided by the magnet to the sample is perpendicular to the direction of the current.

[0069] It should be noted that the magnet is parallel to the rotating disk 130 and nested on the support column 140, and it can also be arranged between the shielding disk 120 and the rotating disk 130. Figure 10 Only the specific position of the magnet device is shown exemplarily. The present solution does not limit the position where the magnetic field device 400 is arranged, as long as it ensures that the direction of the static magnetic field provided by it to the sample is perpendicular to the direction of the current.

[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stage for magnetoacoustic signal detection, characterized in that, It includes a loading tray, a shielding disc, a rotating disc and a support column; One end of the support column is vertically fixed to the rotating disc, the other end of the support column is vertically fixed to the loading tray, the shielding disc is parallel to the rotating disc, and the shielding disc is nested on the support column; The rotating disc is used to drive the loading tray and the shielding disc to rotate through the support column, the shielding disc is used to shield the magnetic field generated in the support column; the loading tray is used to place the sample and apply an excitation current to the sample; The loading platform for magnetoacoustic signal detection further includes a sample excitation source; The sample excitation source includes a connecting wire, a first excitation electrode and a second excitation electrode; The connecting wire is connected to the first excitation electrode and the second excitation electrode, and the connecting wire is used to transmit the excitation current to the first excitation electrode and the second excitation electrode; The column body of the support column includes a wire inlet hole and a wire outlet hole; The wire inlet hole is located between the shielding disc and the rotating disc, and the wire outlet hole is located between the shielding disc and the loading tray; The connecting wire passes through the support column from the wire inlet hole, and the connecting wire passes out of the wire outlet hole and is connected to the first excitation electrode and the second excitation electrode; The shielding disc includes a shielding support disc, a magnetic shielding layer and an acoustic shielding layer; The magnetic shielding layer and the acoustic shielding layer are arranged on any side of the shielding support disc parallel to the rotating disc.

2. The stage for magnetoacoustic signal detection according to claim 1, characterized in that, The loading tray includes a first through hole and a second through hole; The inside of the support column is hollow, and the wire outlet hole includes a first wire outlet hole and a second wire outlet hole; One wire of the connecting wire passes out of the first wire outlet hole and is connected to the first excitation electrode, and the other wire of the connecting wire passes out of the second wire outlet hole and is connected to the second excitation electrode; The first excitation electrode is installed in the first through hole, and the second excitation electrode is installed in the second through hole.

3. The stage for magnetoacoustic signal detection according to claim 1, characterized in that, The rotating disc further includes a pointer; The side surface of the rotating disc perpendicular to the horizontal direction further includes an angle scale; The pointer is used to indicate the rotation angle of the rotating disc according to the angle scale.

4. The stage for magnetoacoustic signal detection according to claim 1, characterized in that The shielding disc is close to or in contact with the loading tray.

5. The stage for magnetoacoustic signal detection according to claim 1, characterized in that, The materials used for the loading tray, the shielding disc, the rotating disc and the support column include acrylic materials.

6. A system for magnetoacoustic signal detection, characterized in that, It includes the loading platform for magnetoacoustic signal detection, a motor module, an excitation device, a magnetic field device and a detection device according to any one of claims 1-5; The excitation device is used to provide an excitation current to the loading tray; The motor module is used to drive the rotating disc to rotate; The magnetic field device is used to provide a static magnetic field to the sample; The detection device is used to detect the magnetoacoustic signal generated by the sample when an excitation current is applied in the static magnetic field.

7. The system for magnetoacoustic signal detection according to claim 6, wherein The magnetic field device is parallel to the rotating disc, and the magnetic field device is nested on the support column; The magnetic field device is arranged between the shielding disc and the loading tray, or arranged between the shielding disc and the rotating disc.

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