Device and method for detecting original extremely low magnetic field of extraterrestrial sample

Abstract

The invention provides a device and a method for detecting an original extremely low magnetic field of an extraterrestrial sample. The detection device comprises: a magnetic shielding cylinder in which a shielding cavity for magnetic field measurement is formed; the atomic magnetometer is arranged in the shielding cavity; the linear displacement platform is arranged above the magnetic shielding cylinder and is used for providing displacement adjustment along a preset direction; the driving motor is fixedly mounted on the linear displacement platform; one end of the glass rod is fixed on an output shaft of the driving motor, and the other end is used for bearing an extraterrestrial sample; wherein under the synergistic effect of the linear displacement platform and the driving motor, the glass rod is driven to move, and the extraterrestrial sample is moved to the measurement area of the atomic magnetometer in the shielding cavity, so that the atomic magnetometer detects the original extremely weak magnetic field of the extraterrestrial sample.

Description

Technical Field

[0001] This disclosure relates to the field of extremely weak magnetic field detection technology, specifically to a device and method for detecting the original extremely weak magnetic field of extraterrestrial samples. Background Technology

[0002] Precise measurement of the magnetic properties of extraterrestrial samples is crucial for understanding the early magnetic field evolution of celestial bodies, meteorite impacts, and the mechanisms of solar wind interaction. This relies on highly sensitive magnetic field measurement techniques to measure the magnetic field signals of extraterrestrial samples. Currently, the core equipment for measuring the magnetic field of extraterrestrial samples is a superconducting rock magnetometer, whose core structure includes a detection coil, a cryogenic cooling system, and a signal amplification module. Its sensitivity is typically on the order of pT (10⁻⁶). -12 This device possesses strong measurement stability and anti-interference capabilities, and has been widely used for the measurement and analysis of magnetic characteristics of extraterrestrial samples and various types of rocks. However, due to the small particle size (μm level) of extraterrestrial samples and the extremely weak original magnetic field signal intensity, which is far below the detection limit of traditional superconducting rock magnetometers, effective detection cannot be achieved. Summary of the Invention

[0003] In view of this, the present disclosure provides a device and method for detecting the original extremely weak magnetic field of extraterrestrial samples, which can at least partially solve the above-mentioned technical problems.

[0004] This disclosure provides, in one aspect, a device for detecting the original extremely weak magnetic field of an extraterrestrial sample, comprising: a magnetic shielding cylinder having an internal shielding cavity for magnetic field measurement; an atomic magnetometer disposed inside the shielding cavity; a linear displacement platform disposed above the magnetic shielding cylinder for providing displacement adjustment along a predetermined direction; a drive motor fixedly mounted on the linear displacement platform; and a glass rod, one end of which is fixed to the output shaft of the drive motor, and the other end of which carries the extraterrestrial sample; wherein, under the cooperative action of the linear displacement platform and the drive motor, the glass rod is driven to move, moving the extraterrestrial sample to the measurement area of ​​the atomic magnetometer inside the shielding cavity, so that the atomic magnetometer can detect the original extremely weak magnetic field of the extraterrestrial sample.

[0005] According to embodiments of this disclosure, the drive motor includes a servo motor, a linear displacement platform, and the servo motor for driving the glass rod to move linearly along the radial direction of the magnetic shielding cylinder. After moving the extraterrestrial sample to the measurement area of ​​the atomic magnetometer, the glass rod is driven to rotate, converting the static magnetic field of the extraterrestrial sample into an alternating magnetic field, so that the atomic magnetometer can collect the magnetic field strength change signal.

[0006] According to embodiments of this disclosure, the detection device further includes: a breadboard with an array of mounting holes on its surface; a right-angle bracket installed in the mounting holes, and a linear displacement platform installed on the right-angle bracket; and a breadboard bracket for mounting the breadboard above the magnetic shielding cylinder to maintain mechanical isolation between the breadboard and the magnetic shielding cylinder.

[0007] According to embodiments of this disclosure, the detection device further includes: a drive motor bracket for fixing the drive motor on a linear displacement platform; a coupling for connecting the glass rod and the output shaft of the drive motor; an atomic magnetometer mounting bracket for mounting and fixing the atomic magnetometer; an internal mounting plate of the shielding cylinder for mounting the atomic magnetometer mounting bracket, so that the atomic magnetometer is in the internal uniform magnetic field region; and a support platform for mounting and fixing the magnetic shielding cylinder and the breadboard bracket.

[0008] According to an embodiment of this disclosure, an extraterrestrial sample is moved to the geometric center of the magnetic shielding cylinder axis via a linear displacement platform.

[0009] According to embodiments of this disclosure, an atomic magnetometer is used to detect the original extremely weak magnetic field of an extraterrestrial sample via a non-contact detection method.

[0010] According to embodiments of this disclosure, the magnetic shielding cylinder is made of a high-permeability material - permalloy. The magnetic shielding cylinder is made of 5 layers of permalloy, with the outermost layer being aluminum alloy and the innermost layer being epoxy tube.

[0011] According to embodiments of this disclosure, the glass rod is made of a high-purity, low-magnetic, and low-hysteresis material.

[0012] According to embodiments of this disclosure, the sensitivity of the atomic magnetometer is on the order of femtotes.

[0013] Another aspect of this disclosure provides a method for detecting the original extremely weak magnetic field of an extraterrestrial sample. The method is characterized by being implemented based on the detection device of this disclosure, and includes: fixing or attaching the extraterrestrial sample to the free end of a glass rod, adjusting the glass rod to an initial position so that the extraterrestrial sample is located outside a magnetic shielding cylinder; moving the extraterrestrial sample to the measurement area of ​​an atomic magnetometer inside the shielding cavity by controlling a linear displacement platform to move along a predetermined direction; driving the glass rod to rotate via a drive motor to convert the static magnetic field of the extraterrestrial sample into an alternating magnetic field; and acquiring the magnetic field strength change signal using an atomic magnetometer.

[0014] The apparatus and method for detecting the original extremely weak magnetic field of extraterrestrial samples provided in this disclosure have at least the following technical effects.

[0015] By constructing an ultra-low magnetic interference environment using a magnetic shielding cylinder, and utilizing the high sensitivity of an atomic magnetometer, the original extremely weak magnetic signals carried by extraterrestrial samples can be detected. Through the coordinated control of a linear displacement platform and a drive motor, precise measurement of the sample within the measurement area can be achieved. In a magnetically shielded environment, magnetic field measurement sensitivity on the order of femtotes (fT) can be achieved, effectively detecting the original extremely weak magnetic signals carried by extraterrestrial samples.

[0016] By employing a motion control method that combines a linear displacement platform with a servo motor, the DC magnetic field of an extraterrestrial sample can be converted into an AC magnetic field signal, thus avoiding interference from residual magnetism in the environment.

[0017] By constructing a precision motion control mechanism consisting of a linear displacement platform, a drive motor, a breadboard, and a right-angle bracket, and in conjunction with a high-sensitivity atomic magnetometer, it is possible to measure the magnetic characteristics of extraterrestrial samples with dimensions down to the micrometer level. This breaks through the limitations of traditional methods in terms of sample size and significantly improves the applicability of magnetic measurements of microscale samples. Attached Figure Description

[0018] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments of this disclosure with reference to the accompanying drawings.

[0019] Figure 1 The diagram schematically illustrates the overall structure of a device for detecting the original extremely weak magnetic field of extraterrestrial samples according to an embodiment of the present disclosure.

[0020] Figure 2 The diagram schematically illustrates the internal structure of the magnetic shielding cylinder of a detection device for the original extremely weak magnetic field of extraterrestrial samples according to an embodiment of the present disclosure.

[0021] Figure 3 A flowchart illustrating a method for detecting the original extremely weak magnetic field of an extraterrestrial sample according to an embodiment of the present disclosure is shown schematically.

[0022] Figure 4 The diagram schematically illustrates the detection results of the original extremely weak magnetic field of an extraterrestrial sample according to an embodiment of the present disclosure. Detailed Implementation

[0023] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0024] Figure 1The diagram schematically illustrates the overall structure of a device for detecting the original extremely weak magnetic field of extraterrestrial samples according to an embodiment of the present disclosure. Figure 2 The diagram schematically illustrates the internal structure of the magnetic shielding cylinder of a detection device for the original extremely weak magnetic field of extraterrestrial samples according to an embodiment of the present disclosure.

[0025] like Figure 1 and Figure 2 As shown, the detection device for the original extremely weak magnetic field of extraterrestrial samples in this embodiment may include a linear displacement platform 1, a drive motor 2, a magnetic shielding cylinder 3, a glass rod 4, and an atomic magnetometer 5.

[0026] The linear displacement platform 1 is positioned above the magnetic shielding cylinder 3 to provide displacement adjustment along a predetermined direction.

[0027] The drive motor 2 is fixedly mounted on the linear displacement platform 1.

[0028] The magnetic shielding cylinder 3 has a shielding cavity inside for magnetic field measurement.

[0029] One end of the glass rod 4 is fixed on the output shaft of the drive motor 2, and the other end is used to support the sample from outside the ground.

[0030] The atomic magnetometer 5 is installed inside the shielded cavity.

[0031] According to an embodiment of this disclosure, under the synergistic action of the linear displacement platform 1 and the drive motor 2, the glass rod 4 is driven to move, moving the extraterrestrial sample to the measurement area of ​​the atomic magnetometer 5 inside the shielded cavity, so that the atomic magnetometer 5 can detect the original extremely weak magnetic field of the extraterrestrial sample.

[0032] According to embodiments of this disclosure, the linear displacement platform 1 can achieve micron-level positioning accuracy through a ball screw structure. The predetermined direction can be, for example, [missing information - likely a specific direction or configuration]. Figure 1 The vertical direction is shown. The linear displacement platform 1 serves as the mechanical foundation of the drive motor 2, supporting the drive motor 2 and transmitting motion. The linear displacement platform 1 and the drive motor 2 form a stable overall motion structure.

[0033] According to embodiments of this disclosure, the drive motor 2 can be selected as a low-vibration, high-precision drive motor to avoid introducing mechanical noise that could interfere with the magnetic field measurement.

[0034] According to embodiments of this disclosure, the magnetic shielding cylinder 3 can effectively shield the geomagnetic field and environmental stray magnetic field interference, providing a near-zero magnetic background environment for the measurement of extremely weak magnetic signals.

[0035] According to the embodiments of this disclosure, one end of the glass rod 4 is fixed to the output shaft of the drive motor 2, and the other end is designed with a sample carrying structure (such as a slot or adsorption device). The glass rod 4 serves as a sample transfer carrier to move the external sample from the outside to the measurement area inside the shielded cavity.

[0036] According to embodiments of this disclosure, the atomic magnetometer 5 can directly measure the original extremely weak magnetic field of extraterrestrial samples without the need for magnetization / demagnetization or pretreatment, thus preserving the original magnetic information of the sample. Extraterrestrial samples may include, for example, lunar soil samples, Martian samples, meteorite slices, or blocky samples.

[0037] In some embodiments, the drive motor 2 may include a servo motor. The linear displacement platform 1 and the servo motor are used to drive the glass rod 4 to move linearly along the radial direction of the magnetic shielding cylinder, and after moving the extraterrestrial sample to the measurement area of ​​the atomic magnetometer 5, drive the glass rod 4 to rotate, converting the static magnetic field of the extraterrestrial sample into an alternating magnetic field, so that the atomic magnetometer 5 can collect the magnetic field strength change signal.

[0038] According to embodiments of this disclosure, the linear displacement platform 1 and the servo motor work together to drive the glass rod 4 to move radially (perpendicular to the axis) along the magnetic shielding cylinder 3, precisely transporting the extraterrestrial sample from its initial position to the measurement area (center of the magnetic shielding cylinder axis) of the atomic magnetometer 5. After the extraterrestrial sample arrives at the measurement area, the servo motor drives the glass rod 4 to rotate around its own axis, converting the static magnetic field of the extraterrestrial sample into an alternating magnetic field (frequency related to the rotation speed). Closed-loop control of the servo motor reduces interference from mechanical vibration on the magnetic field signal.

[0039] In some embodiments, such as Figure 1 and Figure 2 As shown, the detection device also includes: a breadboard 6, a right-angle bracket 7, and a breadboard support 8.

[0040] The surface of breadboard 6 is provided with an array of mounting holes consisting of multiple mounting holes.

[0041] The right-angle bracket 7 is installed in the mounting hole, and the linear displacement platform 1 is installed on the right-angle bracket 7.

[0042] The breadboard bracket 8 is used to mount the breadboard 6 above the magnetic shielding cylinder 3 so that the breadboard 6 and the magnetic shielding cylinder 3 are mechanically isolated.

[0043] In some embodiments, the detection device may further include: a drive motor bracket 9, a coupling 10, an internal mounting plate 11 for the magnetic shielding cylinder, and an atomic magnetometer mounting bracket 12 and a support platform 13.

[0044] The drive motor bracket 9 is used to mount the drive motor 2 on the linear displacement platform 1, so that the linear displacement platform 1 drives the drive motor 2 to radially transport the sample outside the ground.

[0045] One end of the coupling 10 is fixed to the power output shaft of the drive motor 2, and the other end is fixed to the glass rod 4 so that the glass rod 4 is connected to the output shaft of the drive motor 2.

[0046] The mounting plate 11 inside the magnetic shielding cylinder is installed inside the magnetic shielding cylinder 3, and the mounting bracket 12 of the atomic magnetometer 5 is fixed at the center of the mounting plate 11 inside the magnetic shielding cylinder.

[0047] The surface of the support platform 13 is provided with an array of mounting holes for mounting and fixing the magnetic shielding cylinder 3 and the breadboard bracket 8.

[0048] According to embodiments of this disclosure, the breadboard 6 serves as a reference platform for the installation and fixing of the device. Its upper surface is arranged with a standardized array of mounting holes (such as M3, M4, and M6 threaded holes), forming a grid of fixing points. This facilitates the precise positioning and repeated installation of the linear displacement platform 1, the right-angle bracket 7, and other components. The breadboard 6 is fixedly mounted above the magnetic shielding cylinder 3 via the breadboard bracket 8, maintaining mechanical isolation from the magnetic shielding cylinder 3, thereby preventing external vibrations and mechanical stress from being directly transmitted to the interior of the magnetic shielding cylinder.

[0049] The positional tolerance of the mounting holes in the standardized mounting hole array must be ≤ ±0.05 mm to ensure the installation accuracy of the right-angle bracket 7 and the linear displacement platform 1.

[0050] The right-angle bracket 7 can be an L-shaped metal part (such as aluminum alloy or stainless steel), with through holes machined on both sides to match the mounting holes of the breadboard 6. By selecting different mounting hole positions, the axial height of the linear displacement platform 1 can be finely adjusted, optimizing the docking accuracy between the linear displacement platform 1 and the glass rod 4.

[0051] The breadboard bracket 8 can be made of aluminum alloy and is fixed to the support platform 13 through standardized mounting holes (M6 threaded holes) inside the bracket. The breadboard bracket 8 can block the transmission of vibration from the drive motor 2 to the magnetic shielding cylinder 3, thus avoiding interference from the atomic magnetometer 5.

[0052] In some embodiments, the atomic magnetometer 5 is disposed within the central magnetic field uniform region inside the magnetic shielding cylinder 3. This region provides the measurement area with optimal magnetic shielding and the highest magnetic field uniformity. The atomic magnetometer 5 can detect changes in magnetic field strength at its location in real time and output the measurement signal to an external data acquisition and processing system. The sensitivity of the atomic magnetometer is on the order of femtotes (10^6). -15 T).

[0053] In some embodiments, the atomic magnetometer 5 is used to detect the original extremely weak magnetic field of an extraterrestrial sample in a non-contact detection manner. That is, under the coordinated action of the linear displacement platform 1 and the drive motor 2, the glass rod 4 is driven to move, moving the extraterrestrial sample to the measurement area of ​​the atomic magnetometer 5 inside the shielded cavity, but without contacting the atomic magnetometer 5, thus avoiding interference that may be introduced by contact detection (such as mechanical vibration, heat conduction, magnetic contamination).

[0054] In some embodiments, the material of the magnetic shielding cylinder 3 includes a high magnetic permeability material, and the magnetic shielding cylinder 3 is made of multiple layers of high magnetic permeability material.

[0055] According to embodiments of this disclosure, the high magnetic permeability material may include permalloy, whose core function is to provide a low magnetic reluctance path, "short-circuiting" the external magnetic field to the shielding layer and reducing magnetic field leakage into the shielding cavity. For example, the core of the magnetic shielding cylinder 3 is made of 5 layers of permalloy to shield external magnetic field interference. The outermost layer is an aluminum alloy shell, and the innermost layer is an epoxy resin tube to shield environmental noise interference, thus creating an ultra-low magnetic interference environment for the measurement of the original extremely weak magnetic field of extraterrestrial samples.

[0056] In some embodiments, the glass rod 4 is made of a low-magnetic, low-hysteresis material. For example, it may include high-purity quartz glass, borosilicate glass, etc. The glass rod 4 needs to be connected to the output shaft of the drive motor 2 via a coupling 10. The coefficient of thermal expansion of the glass rod 4 needs to match that of the sample carrier; for example, using high-purity quartz glass, to avoid sample position shift due to temperature changes.

[0057] Based on the above-described device for detecting the original extremely weak magnetic field of extraterrestrial samples, embodiments of this disclosure also provide a method for detecting the original extremely weak magnetic field of extraterrestrial samples.

[0058] Figure 3 A flowchart illustrating a method for detecting the original extremely weak magnetic field of an extraterrestrial sample according to an embodiment of the present disclosure is shown schematically.

[0059] like Figure 3 As shown, the method for detecting the original extremely weak magnetic field of extraterrestrial samples in this embodiment may include operations S310 to S340.

[0060] After operating S310 to fix or attach the extraterrestrial sample to the free end of the glass rod, adjust the glass rod to the initial position so that the extraterrestrial sample is located outside the magnetic shielding cylinder.

[0061] When operating S320, the linear displacement platform is controlled to move along a predetermined direction, and the glass rod is moved by the drive motor to move the extraterrestrial sample to the measurement area of ​​the atomic magnetometer inside the shielded cavity.

[0062] When operating the S330, the glass rod is rotated by a drive motor, converting the static magnetic field of the extraterrestrial sample into an alternating magnetic field.

[0063] When operating the S340, the magnetic field strength change signal is collected through the atomic magnetometer.

[0064] According to embodiments of this disclosure, the extraterrestrial sample to be tested (such as a lunar soil sample, a Martian sample, a meteorite slice, or a block sample) is fixed or attached to the lower end of a glass rod 4. The glass rod 4 is made of high-purity quartz to avoid interference with magnetic measurements. The upper end of the glass rod 4 is fixedly connected to the output shaft of a servo motor via a gasket-type coupling 10. Under the coordinated action of the servo motor and the linear displacement platform 1, the glass rod 4 can move along the radial direction of the magnetic shielding cylinder 3 (… Figure 1 It performs high-precision, controllable linear motion in the downward direction and achieves rotational scanning of extraterrestrial samples.

[0065] After the extraterrestrial sample is installed, the glass rod 4 is adjusted to its initial position so that the sample is completely outside the magnetic shielding cylinder 3, thus avoiding any impact on the atomic magnetometer 5 before the system is stable.

[0066] Subsequently, by controlling the linear displacement platform 1, the glass rod 4 is slowly moved downwards at a predetermined speed along the radial direction of the magnetic shielding cylinder 3, allowing the extraterrestrial sample to gradually enter the interior of the magnetic shielding cylinder 3. When the sample reaches the measurement area of ​​the atomic magnetometer 5, the drive motor 2 drives the glass rod 4 to rotate, converting the static magnetic field signal of the sample into an alternating magnetic field. The atomic magnetometer 5 collects the magnetic field strength change signal in real time and continuously outputs the data to an external data acquisition system.

[0067] It should be noted that the specific implementation details and technical effects of the embodiment of the method for detecting the original extremely weak magnetic field of extraterrestrial samples are the same as or similar to those of the embodiment of the device for detecting the original extremely weak magnetic field of extraterrestrial samples, and will not be repeated here.

[0068] Figure 4 The diagram schematically illustrates the detection results of the original extremely weak magnetic field of an extraterrestrial sample according to an embodiment of the present disclosure.

[0069] like Figure 4 As shown, for extraterrestrial samples with a particle size <0.1 mm, the original extremely weak magnetic field detected in the extraterrestrial samples was 61 fT / Hz. 1 / 2 Therefore, it can be seen that the detection device and method for the original extremely weak magnetic field of extraterrestrial samples provided in the embodiments of this disclosure can realize the measurement of magnetic field on the order of fT for micrometer-scale extraterrestrial samples.

[0070] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used in a powerful combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A device for detecting the original extremely weak magnetic field of extraterrestrial samples, characterized in that, include: A magnetic shielding cylinder, with an internal shielding cavity for magnetic field measurement; An atomic magnetometer is installed inside the shielded cavity; A linear displacement platform is positioned above the magnetic shielding cylinder to provide displacement adjustment along a predetermined direction; The drive motor is fixedly mounted on the linear displacement platform; A glass rod, one end of which is fixed to the output shaft of the drive motor, and the other end of which is used to support the external sample; The linear displacement platform and the drive motor work together to move the glass rod, moving the extraterrestrial sample to the measurement area of ​​the atomic magnetometer inside the shielded cavity, so that the atomic magnetometer can detect the original extremely weak magnetic field of the extraterrestrial sample.

2. The detection device according to claim 1, characterized in that, The drive motor includes a servo motor; The linear displacement platform and the servo motor are used to drive the glass rod to move linearly along the radial direction of the magnetic shielding cylinder, move the extraterrestrial sample to the measurement area of ​​the atomic magnetometer, and then drive the glass rod to rotate, converting the static magnetic field of the extraterrestrial sample into an alternating magnetic field, so that the atomic magnetometer can collect the magnetic field intensity change signal.

3. The detection device according to claim 1 or 2, characterized in that, The detection device further includes: The breadboard has an array of mounting holes on its surface. A right-angle bracket is installed in the mounting hole, and the linear displacement platform is installed on the right-angle bracket; A breadboard bracket is used to mount the breadboard above the magnetic shielding cylinder to maintain mechanical isolation between the breadboard and the magnetic shielding cylinder.

4. The detection device according to claim 3, characterized in that, The detection device further includes: A drive motor bracket is used to mount the drive motor on the linear displacement platform; A coupling is used to connect the glass rod to the output shaft of the drive motor; An atomic magnetometer mounting bracket is used to mount and fix the atomic magnetometer. The magnetic shielding cylinder has an internal mounting plate for mounting the atomic magnetometer bracket, which places the atomic magnetometer in a uniform magnetic field region inside. A support platform is used to install and fix the magnetic shielding cylinder and the breadboard bracket.

5. The detection device according to claim 1 or 2, characterized in that, The extraterrestrial sample is moved to the geometric center of the magnetic shielding cylinder axis via a linear displacement platform.

6. The detection device according to claim 1 or 2, characterized in that, The atomic magnetometer is used to detect the original extremely weak magnetic field of the extraterrestrial sample through a non-contact detection method.

7. The detection device according to claim 1 or 2, characterized in that, The magnetic shielding cylinder is made of a high-permeability material, and the magnetic shielding cylinder is made of multiple layers of high-permeability material.

8. The detection device according to claim 1 or 2, characterized in that, The glass rod is made of high-purity, low-magnetic, and low-hysteresis materials.

9. The detection device according to claim 1 or 2, characterized in that, The atomic magnetometer has a sensitivity on the order of femtotes.

10. A method for detecting the original extremely weak magnetic field of extraterrestrial samples, characterized in that, The detection method is implemented based on the detection device according to any one of claims 1 to 9, and includes: After fixing or attaching the extraterrestrial sample to the free end of the glass rod, adjust the glass rod to the initial position so that the extraterrestrial sample is located outside the magnetic shielding cylinder; By controlling the linear displacement platform to move along a predetermined direction, the glass rod is moved via a drive motor, and the extraterrestrial sample is moved to the measurement area of ​​the atomic magnetometer inside the shielded cavity. The static magnetic field of the extraterrestrial sample is converted into an alternating magnetic field by driving a glass rod to rotate using a drive motor. The magnetic field strength change signal is collected by an atomic magnetometer.

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