Detection device

Abstract

The utility model discloses detection equipment, and belongs to the technical field of magnetic impurity detection. The magnetic measurement module of the detection equipment comprises a shielding cover assembly which is provided with a magnetic shielding accommodating cavity; the movable sample vessel is arranged in the shielding cover assembly, and the movable sample vessel is used for bearing a sample to be detected; the magnetic probe is arranged in the shielding cover assembly, the movable sample vessel can move in the shielding cover assembly in the first direction, and the magnetic probe is used for measuring the magnetic induction intensity of the to-be-detected sample in the moving process. The magnetic impurity detection device can detect magnetic impurities in a sample during movement, and facilitates auxiliary calibration of the quality of the magnetic impurities in the sample.

Description

Technical Field

[0001] This utility model relates to the field of magnetic impurity detection technology, and in particular to a detection device. Background Technology

[0002] In recent years, as a core component of new energy vehicles, the reliable and scientific assembly of power batteries has always been a key focus in the new energy vehicle field.

[0003] Lithium-ion batteries have rapidly become the standard power source for portable devices. They provide the same energy as nickel-metal hydride batteries but are about 35% lighter. The fact that lithium-ion batteries have no "memory effect" and do not contain toxic substances are also important factors that have made them the standard power source for power batteries.

[0004] Among these factors, the quality of magnetic impurities has a significant impact on the performance of lithium batteries. Magnetic impurities can cause non-uniform distribution of materials during battery operation, leading to localized overvoltage and overcurrent phenomena within the battery, damaging the internal structure, and accelerating battery aging. Therefore, accurate detection of the quality of magnetic impurities in lithium batteries (i.e., the content of magnetic impurities in the lithium battery) is of great importance.

[0005] Therefore, there is an urgent need to provide a testing device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a detection device that can detect the magnetic induction intensity of magnetic impurities in a sample during movement, so that the magnetic probe can obtain a signal peak, which facilitates the calibration of the quality of magnetic impurities in the sample.

[0007] To achieve the above objectives, the following technical solution is provided:

[0008] The testing equipment includes a magnetic measurement module, which comprises:

[0009] The shielding cover assembly is equipped with a magnetic shielding accommodating cavity;

[0010] A movable sample dish is disposed within the shielding assembly, and the movable sample dish is used to hold the sample to be tested;

[0011] A magnetic probe is disposed within the shielding assembly, and the movable sample dish is movable within the shielding assembly along a first direction. The magnetic probe is used to measure the magnetic induction intensity of the sample to be tested.

[0012] As an optional solution for the detection equipment, the magnetic probe is oriented along the second direction, and the first direction is perpendicular to the second direction.

[0013] As an optional solution for the detection equipment, the magnetic probe is oriented along the detection axis, the movable sample dish is movable along the detection path, and the detection axis is coplanar and perpendicular to the detection path.

[0014] As an optional solution for the detection equipment, the magnetic measurement module also includes a lifting mechanism, and the magnetic probe is disposed at the movable end of the lifting mechanism to adjust the height of the magnetic probe along the second direction.

[0015] As an optional solution for the testing equipment, the shielding assembly includes a magnetic shielding cylinder, a first magnetic sealing cover, and a second magnetic sealing cover. The first magnetic sealing cover is located at one port of the magnetic shielding cylinder, and the second magnetic sealing cover is used to open or close the other port of the magnetic shielding cylinder.

[0016] As an optional solution for the testing equipment, several magnetic shielding cylinders are provided, and the several magnetic shielding cylinders are nested together.

[0017] As an optional solution for the testing equipment, the shielding assembly includes an active magnetic shielding electromagnetic coil, which is disposed on the magnetic shielding cylinder. The active magnetic shielding electromagnetic coil is used to make the magnetic measurement value of the magnetic probe zero before the sample is tested.

[0018] As an optional solution for the detection equipment, the magnetic measurement module also includes a pushing mechanism, and the moving sample dish is connected to the pushing mechanism in a transmission manner. The pushing mechanism is used to move the moving sample dish along the first direction.

[0019] As an optional solution for the detection equipment, a cantilever assembly extending along the first direction is provided on the side of the second magnetic sealing cover facing the first magnetic sealing cover. The movable sample dish is slidably passed through the guide rod of the cantilever assembly. A base is provided on the side of the first magnetic sealing cover facing the second magnetic sealing cover. One end of the cantilever assembly is slidably connected to the guide groove of the base.

[0020] As an optional solution for the detection equipment, the magnetic measurement module further includes a slide that can move along the first direction. The pushing mechanism includes a slide mechanism with a motor and a lead screw. The slide mechanism and the second magnetic sealing cover are both mounted on the slide. One end of the lead screw is rotatably connected to the slider of the slide mechanism, and the other end of the lead screw passes through the second magnetic sealing cover and is rotatably connected to the limiting block of the cantilever assembly. The moving sample dish is threadedly connected to the lead screw.

[0021] As an optional solution for the testing equipment, the testing equipment also includes a mounting base, the bottom of which is provided with a first shock absorber, and the magnetic measurement module is mounted on the mounting base.

[0022] As an optional solution for the testing equipment, the testing equipment also includes a weighing module for measuring the weight of the sample to be tested, and a second shock absorber is provided between the weighing module and the mounting base.

[0023] As an optional solution for the detection equipment, the detection equipment also includes a magnetization module, which is used to make the magnetic field direction of the magnetic material in the sample to be detected the same.

[0024] As an optional solution for the detection equipment, the magnetization module includes a first electromagnet and a second electromagnet arranged at intervals, the magnetic poles of the first electromagnet and the second electromagnet being opposite, and the area formed between the first electromagnet and the second electromagnet being a magnetization processing area.

[0025] As an optional solution for the detection equipment, the magnetization module also includes a cooling component, which is used to reduce the temperature of the first electromagnet and the second electromagnet.

[0026] As an optional solution for the testing equipment, the cooling component includes a cooling fan or a cooling channel.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] The detection device provided by this utility model includes a magnetic probe and a movable sample dish that can move along a first direction within the magnetically shielded cavity of a shielding assembly. The magnetic probe measures the magnetic induction intensity of the sample under test while it is moving. When the sample under test is placed on the movable sample dish, the magnetic probe receives a signal that changes from weak to strong and then back to weak as the dish passes it – a signal peak. The peak area is obtained by integrating the signal peak. The mass of magnetic impurities in the sample is then determined using the peak area (measured by magnetic measurement and integration) and a calibration linear function (obtained through prior experimentation). For example, at least two samples with different masses of magnetic impurities (i.e., the content of magnetic impurities in the sample) are measured by the detection device, yielding at least two corresponding peak areas. A fitted calibration linear function is established using the mass of the magnetic impurities and the peak area. When a unit mass of an unknown sample under test passes through the detection device, the peak area is obtained by integrating the signal peak. Substituting the obtained peak area into the calibration linear function yields the mass of magnetic impurities in the unknown sample. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the assembly of the detection equipment in an embodiment of this utility model;

[0031] Figure 2 This is a partial structural schematic diagram of the magnetic measurement module in an embodiment of this utility model.

[0032] Figure label:

[0033] 100. Magnetic measurement module; 200. Mounting base; 201. First shock absorber; 300. Weighing module; 301. Second shock absorber; 400. Magnetization module; 401. First electromagnet; 402. Second electromagnet; 403. Cooling component;

[0034] 1. Shielding cover assembly; 2. Moving sample dish; 3. Magnetic probe; 4. Lifting mechanism; 5. Pushing mechanism; 6. Slide; 7. Handle;

[0035] 11. Magnetic shielding cylinder; 12. First magnetic sealing cover; 13. Second magnetic sealing cover; 14. Cantilever assembly; 141. Guide rod; 142. Limiting block; 143. Support plate; 15. Base support;

[0036] 51. Slide mechanism; 511. Slider; 52. Lead screw; 53. Scale indicator. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] To detect the magnetic induction intensity of magnetic impurities in a sample during motion, enabling the magnetic probe to obtain a signal peak and facilitating the calibration of the mass of magnetic impurities in the sample, this embodiment provides a detection device, which is described below in conjunction with... Figure 1 and Figure 2 The specific content of this embodiment will be described in detail. It is necessary to explain that... Figure 1 The X direction in this embodiment refers to the first direction and the detection path. Figure 1 The Z direction in this embodiment is the second direction mentioned in this embodiment.

[0042] like Figure 1 As shown, the detection device in this embodiment includes a magnetic measurement module 100, which comprises a shielding assembly 1, a movable sample dish 2, and a magnetic probe 3. The shielding assembly 1 has a magnetically shielded cavity to shield the influence of external magnetic fields on the magnetic measurement. The movable sample dish 2 is placed inside the shielding assembly 1 to hold the sample to be tested. The magnetic probe 3 is placed inside the shielding assembly 1, allowing the movable sample dish 2 to move along a first direction within the shielding assembly 1. The magnetic probe 3 measures the magnetic induction intensity of the sample during its movement.

[0043] In summary, the detection device provided in this embodiment includes a magnetic probe 3 and a movable sample dish 2 that can move along a first direction within the magnetic shielding cavity of the shielding assembly 1. The magnetic probe 3 is used to measure the magnetic induction intensity of the sample to be tested while it is moving. Utilizing the principle that the signal peak area formed by the magnetic probe 3 has a high linearity with the mass of the magnetic material as the magnetic material approaches and moves away from the magnetic probe 3, the sample to be tested is placed on the movable sample dish 2. As the movable sample dish 2 passes the magnetic probe 3, the magnetic probe 3 will obtain a signal that changes from weak to strong and then from strong to weak—that is, a signal peak. The signal peak refers to the curve formed by the measured magnetic signal intensity of the magnetic probe 3 versus time. The peak area is obtained by integrating the signal peak, and the mass of magnetic impurities in the sample is obtained using the peak area (by magnetic measurement and integration) and a calibrated linear function (by pre-experimentation). For example, after taking at least two sets of samples with different masses of magnetic impurities (i.e., the content of magnetic impurities in the sample) and measuring them with a detection device, at least two sets of corresponding peak areas are obtained. A calibration linear function is then established using the mass of the magnetic impurities and the peak areas. After a unit mass of an unknown sample to be tested is passed through the detection device, the obtained peak areas are substituted into the calibration linear function to obtain the mass of magnetic impurities in the unknown sample.

[0044] Preferably, the magnetic probe 3 is oriented along the detection axis, allowing the sample dish 2 to move along the detection path (also known as the first direction), with the detection axis and the detection path being coplanar and perpendicular. The magnetic probe 3 is also oriented along a second direction, with the first direction perpendicular to the second direction. Macroscopically, the magnetic detection sensitive direction of the magnetic probe 3 refers to the direction of the line perpendicular to the translational track of the sample to be detected. This is because only when the orientation of the magnetic probe 3 (i.e., the direction of the perpendicular line) is the second direction, and the second direction is coplanar and perpendicular to the first direction, can the magnetic component of the magnetic impurities in the direction of the line connecting the magnetic probe 3 and the sample be maximized when the sample to be detected is closest to the magnetic probe 3 (i.e., directly below the magnetic probe 3).

[0045] Furthermore, the magnetic measurement module 100 also includes a lifting mechanism 4, with the magnetic probe 3 positioned at the movable end of the lifting mechanism 4, for adjusting the height of the magnetic probe 3 along a second direction. By adding the lifting mechanism 4, the magnetic probe 3 can also have a height adjustment function, thus enabling the magnetic probe 3 to meet different application scenarios.

[0046] Specifically, the shielding assembly 1 includes a magnetic shielding cylinder 11, a first magnetic sealing cover 12, and a second magnetic sealing cover 13. The first magnetic sealing cover 12 is sealed at one port of the magnetic shielding cylinder 11, and the second magnetic sealing cover 13 is used to open or close the other port of the magnetic shielding cylinder 11. In this embodiment, the first magnetic sealing cover 12 and the magnetic shielding cylinder 11 are connected as an integrated structure, while the second magnetic sealing cover 13 and the magnetic shielding cylinder 11 are designed separately. Opening the second magnetic sealing cover 13 facilitates the placement and removal of the sample to be tested.

[0047] Preferably, a plurality of magnetic shielding cylinders 11 are provided, and the plurality of magnetic shielding cylinders 11 are nested together. By having multiple magnetic shielding cylinders 11 nested together, the shielding capability of the magnetic shielding cylinders 11 is further improved, and interference from external magnetic fields is eliminated.

[0048] Optionally, the magnetic shielding cylinder 11, the first magnetic sealing cover 12, and the second magnetic sealing cover 13 are made of permalloy. Permalloy refers to an iron-nickel alloy with a wide range of nickel content, between 35% and 90%. The most significant characteristic of permalloy is its high permeability in weak magnetic fields.

[0049] Furthermore, the shielding assembly 1 includes an active magnetic shielding electromagnetic coil, which is disposed on the magnetic shielding cylinder 11. The active magnetic shielding electromagnetic coil is a Helmholtz coil. The active magnetic shielding electromagnetic coil is used to make the magnetic measurement value of the magnetic probe 3 zero before the sample measurement begins. By adding the active magnetic shielding electromagnetic coil, active magnetic shielding is achieved, i.e., a compensating magnetic field is generated to cancel the interfering magnetic field, further eliminating external magnetic interference.

[0050] Specifically, active magnetic shielding electromagnetic coils are arranged between the multilayer permalloy used for magnetic shielding. This allows for active magnetic shielding (i.e., generating a compensating magnetic field to cancel out interfering magnetic fields) when the magnetic shielding capability is insufficient to achieve zero magnetic field inside the magnetic shielding cylinder 11. Specifically, during active magnetic shielding, the moving sample dish 2 can be left empty, and then the magnetic shielding cylinder 11 is closed, allowing the moving sample dish 2 to move along a first direction. Active magnetic shielding is then performed based on the detection results of the magnetic probe 3 at different positions of the moving sample dish 2. This ensures that, without a sample to be tested, the magnetic measurement value of the magnetic probe 3 is zero regardless of the position of the moving sample dish 2.

[0051] Furthermore, the magnetic measurement module 100 also includes a pushing mechanism 5, which is connected to the moving sample dish 2 via a transmission mechanism. The pushing mechanism 5 is used to move the moving sample dish 2 along a first direction. As the power mechanism for the movement of the moving sample dish 2, the pushing mechanism 5 can make the moving sample dish 2 reciprocate along the first direction, enabling the magnetic probe 3 to detect the signal peak.

[0052] Optionally, a cantilever assembly 14 extending in a first direction is provided on the side of the second magnetic sealing cover 13 facing the first magnetic sealing cover 12. The cantilever assembly 14 includes a support plate 143 and two limiting blocks 142 located on the support plate 143, with a guide rod 141 disposed between the two limiting blocks 142. The movable sample dish 2 slides through the guide rod 141 of the cantilever assembly 14, and can slide along the guide rod 141 under the action of the pushing mechanism 5. A base 15 is provided on the side of the first magnetic sealing cover 12 facing the second magnetic sealing cover 13. The base 15 is provided with a guide groove extending in the first direction. One end of the cantilever assembly 14 is slidably connected to the guide groove of the base 15, so that one end of the cantilever assembly 14 can slide in the first direction within the base 15, which facilitates the accurate closing of the second magnetic sealing cover 13 and the magnetic shielding cylinder 11 and avoids assembly gaps.

[0053] Furthermore, the magnetic measurement module 100 also includes a slide 6 capable of moving along a first direction. The pushing mechanism 5 includes a slide mechanism 51 with a motor and a lead screw 52. The slide mechanism 51 and the second magnetic sealing cover 13 are both mounted on the slide 6. A handle 7 is provided on the slide 6, allowing manual pushing of the slide 6 to smoothly slide the slide mechanism 51 and the second magnetic sealing cover 13. One end of the lead screw 52 is rotatably connected to the slider 511 of the slide mechanism 51, and the other end of the lead screw 52 passes through the second magnetic sealing cover 13 and is rotatably connected to the limiting block 142 of the cantilever assembly 14. The moving sample dish 2 is threadedly connected to the lead screw 52. The motor drives the lead screw 52 to rotate, thereby causing the moving sample dish 2 to move along the first direction at a set speed. A scale indicator 53 is also provided on the side wall of the slider 511.

[0054] Furthermore, the testing equipment also includes a mounting base 200, with a first shock absorber 201 at the bottom of the mounting base 200. The magnetic measurement module 100 is mounted on the mounting base 200. The slide 6 of the magnetic measurement module 100 slides along a guide rail within the mounting base 200. The magnetic shielding cylinder 11 is fixedly mounted on the upper beam of the mounting base 200 via a bracket. The lifting mechanism 4 is also mounted on the upper beam of the mounting base 200 via a gantry frame. The lifting mechanism 4 can be, but is not limited to, a lead screw 52 and a lead nut mechanism; no further restrictions are imposed here. By providing the first shock absorber 201 at the bottom of the mounting base 200, vibrations are prevented from affecting the measurements of the magnetic measurement module 100. The first shock absorber 201 can be, but is not limited to, a shock-absorbing spring, a shock-absorbing rubber block, or a shock-absorbing airbag.

[0055] Furthermore, the testing equipment also includes a weighing module 300 for measuring the weight of the sample to be tested, and a second shock absorber 301 is disposed between the weighing module 300 and the mounting base 200. In this embodiment, the second shock absorber 301 can be, but is not limited to, a shock-absorbing pad. By adding the second shock absorber 301, measurement errors of the weighing module 300 caused by vibration can be avoided. The weighing module 300 is used to measure the mass of the sample, and the magnetic impurity abundance of the sample is obtained based on the mass of magnetic impurities in the sample and the mass of the sample.

[0056] Furthermore, the detection device also includes a magnetization module 400, which is used to align the magnetic field directions of the magnetic materials in the sample to be tested. The magnetization module 400 ensures that the microscopic magnetic moments of the sample are aligned, transforming random magnetic moments into an ordered sequence, thus guaranteeing the consistency and repeatability of the test results. To maximize the magnetic field signal detected by the magnetic probe 3, the direction of the magnetized magnetic field should be as similar as possible to the magnetic detection sensitive direction of the magnetic probe 3.

[0057] Specifically, the magnetization module 400 includes a first electromagnet 401 and a second electromagnet 402 spaced apart. The magnetic poles of the first electromagnet 401 and the second electromagnet 402 are opposite, and the area formed between the first electromagnet 401 and the second electromagnet 402 is a magnetization processing area. After the first electromagnet 401 and the second electromagnet 402 are powered on, they magnetize the sample to be tested, making the direction of the sample's microscopic magnetic moment consistent.

[0058] Optionally, the magnetization module 400 further includes a cooling element 403, which is used to reduce the temperature of the first electromagnet 401 and the second electromagnet 402. Since the first electromagnet 401 and the second electromagnet 402 generate heat during operation, the addition of the cooling element 403 can keep the first electromagnet 401 and the second electromagnet 402 within a suitable temperature range. Exemplarily, the cooling element 403 can be, but is not limited to, a cooling fan or a cooling channel.

[0059] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Detection equipment, characterized in that, The invention comprises a magnetic measurement module (100), wherein the magnetic measurement module (100) comprises: A shielding cover assembly (1) is provided with a magnetic shielding accommodating cavity; A movable sample dish (2) is arranged in the shielding cover assembly (1), and the movable sample dish (2) is used for holding a sample to be tested; The magnetic probe (3) is arranged in the shielding cover assembly (1); the movable sample dish (2) can move in the shielding cover assembly (1) along a first direction; and the magnetic probe (3) is used to measure the magnetic induction intensity of the sample to be detected.

2. The detection device according to claim 1, characterized in that: The magnetic probe (3) is oriented along a second direction, and the first direction is perpendicular to the second direction.

3. The detection device according to claim 1, characterized in that: The magnetic probe (3) is oriented along a detection axis, the movable sample dish (2) is movable along a detection path, and the detection axis is coplanar and perpendicular to the detection path.

4. The detection device according to claim 2, characterized in that: The magnetic measurement module (100) further comprises a lifting mechanism (4), and the magnetic probe (3) is arranged at a movable end of the lifting mechanism (4) and is used to adjust the height of the magnetic probe (3) along a second direction.

5. The detection device according to claim 1, characterized in that: The shielding cover assembly (1) comprises a magnetic shielding cylinder (11), a first magnetic sealing cover (12) and a second magnetic sealing cover (13); the first magnetic sealing cover (12) is a sealing cover arranged at one port of the magnetic shielding cylinder (11); and the second magnetic sealing cover (13) is used to open or close the other port of the magnetic shielding cylinder (11).

6. The detection device according to claim 5, characterized in that: A plurality of magnetic shielding cylinders (11) are provided, and the plurality of magnetic shielding cylinders (11) are sleeved with each other.

7. The detection device according to claim 5, characterized in that: The shielding cover assembly (1) comprises an active magnetic shielding electromagnetic coil, which is arranged on the magnetic shielding cylinder (11) and is used to make the magnetic measurement value of the magnetic probe (3) zero before starting to measure the sample.

8. The detection device according to claim 5, characterized in that: The magnetic measurement module (100) further comprises a pushing mechanism (5), the mobile sample dish (2) being transmission-connected to the pushing mechanism (5), and the pushing mechanism (5) being used to move the mobile sample dish (2) along the first direction.

9. The detection device according to claim 8, characterized in that: A cantilever assembly (14) extending along the first direction is arranged on the side of the second magnetic closure cover (13) facing the first magnetic closure cover (12); the movable sample dish (2) is slidably arranged on a guide rod (141) of the cantilever assembly (14); a base (15) is arranged on the side of the first magnetic closure cover (12) facing the second magnetic closure cover (13); one end of the cantilever assembly (14) is slidably connected to a guide groove of the base (15).

10. The detection device according to claim 9, characterized in that: The magnetic measurement module (100) further comprises a slide seat (6) capable of moving along the first direction, the pushing mechanism (5) comprises a slide mechanism (51) with a motor and a lead screw (52), the slide mechanism (51) and the second magnetic sealing cover (13) are both mounted on the slide seat (6), one end of the lead screw (52) is rotatably connected to a slider (511) of the slide mechanism (51), the other end of the lead screw (52) passes through the second magnetic sealing cover (13) and is rotatably connected to a limit block (142) of the cantilever assembly (14), and the movable sample dish (2) is threadedly connected to the lead screw (52).

11. The detection device according to any one of claims 1 to 10, characterized in that: The detection device further comprises a mounting base (200), a first shock absorbing member (201) being arranged at the bottom of the mounting base (200), and the magnetic measurement module (100) being arranged on the mounting base (200).

12. The detection device according to claim 11, characterized in that: The detection device further comprises a weighing module (300) for measuring the weight of the sample to be detected, and a second shock absorbing member (301) is arranged between the weighing module (300) and the mounting base (200).

13. The detection device according to claim 1, characterized in that: The detection device further comprises a magnetization module (400), and the magnetization module (400) is used to make the magnetic field directions of the magnetic substances in the sample to be detected the same.

14. The detection device according to claim 13, characterized in that: The magnetization module (400) comprises a first electromagnet (401) and a second electromagnet (402) which are arranged at an interval, the magnetic poles of the first electromagnet (401) and the second electromagnet (402) are opposite, and the area formed between the first electromagnet (401) and the second electromagnet (402) is a magnetization processing area.

15. The detection device according to claim 14, characterized in that: The magnetizing module (400) further comprises a temperature reducing component (403), wherein the temperature reducing component (403) is used to reduce the temperature of the first electromagnet (401) and the second electromagnet (402).

16. The detection device according to claim 15, characterized in that: The temperature-reducing component (403) comprises a heat-dissipating fan or a cooling channel.

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