A space static sounding sampler and method of use

Abstract

The application belongs to the field of geotechnical engineering, and discloses a space static sounding sampler and a use method. In the process of lunar in-situ testing and sampling, the traditional static sounding device is separated from the sampling device, which leads to complicated operation; the lunar day-night temperature difference is large, and the traditional static sounding result error is large, and the like. The application designs a space static sounding sampler based on the principle of static sounding and optical fiber sensing technology, and improves the penetration device of the static sounding, so that the space static sounding sampler has the characteristics of high precision and strong anti-interference capability, and the use method of the space static sounding sampler is given. The application mainly comprises a static penetration system and a signal acquisition system, and can realize the functions of lunar soil in-situ sounding, in-situ sampling and data transmission. The whole testing system has high testing precision and simple operation. In conclusion, the space static sounding sampler is superior to the traditional static sounding device, and is more suitable for in-situ testing work in the lunar extreme environment.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering, and in particular to a spatial static cone penetration tester and its usage method. Background Technology

[0002] Achieving in-situ lunar construction has always been a major scientific issue that top scientists worldwide have been continuously considering, and it has significant strategic importance and scientific value for my country's lunar landing program. A prerequisite for in-situ lunar construction is a thorough understanding of the engineering properties of the lunar regolith (from the surface to a depth of 0.5 meters), primarily manifested in experimental research and theoretical analysis of the physical properties of the lunar regolith under low gravity conditions.

[0003] On Earth, engineering methods such as the Standard Penetration Test (SPT) and the Static Penetration Test (CPT) are commonly used for preliminary geological exploration. Among them, the CPT experiment is widely used, the experiment is relatively rigorous, and it can test the mechanical properties of the soil in real time along the depth. The method of obtaining soil parameters is also relatively scientific and reasonable. In fact, in 1970, the Soviet Union's Lunokhod lunar rover carried CPT equipment and successfully conducted an experiment (Slyuta, EN 2014. Physical and mechanical properties of the lunar soil (a review). Solar System Research, 48(5): 330–353). However, due to the limitations at that time, it could only drill to a depth of 10 centimeters, and the data obtained was only the total penetration resistance. Meanwhile, American scholars have also used lunar soil simulations to conduct low-gravity CPT experiments and calculate bearing capacity (Costes, NC, Carrier, WD, Mitchell, JK, and Scott, RF 1970. Apollo 11 soil mechanics investigation. Science, 167(3918): 739–741. doi:10.1126 / science.167.3918.739.). It is evident that the CPT experiment is an internationally recognized method for probing the mechanical properties of lunar soil. From the perspective of shear rheology of granular materials, the CPT experiment is essentially an intrusion of granular materials. This intrusion is common and complex in granular materials (e.g., phase transitions exist). In response, researchers from this project team, after in-depth discussions with researchers outside the team in this field, all agreed that the particle intrusion phenomenon is related to gravity level and strain rate. Furthermore, the project team has previously established a unified rheological model to characterize this rheological property of particulate materials, and further lunar CPT experiments will be of great significance for model verification and application. On the other hand, lunar soil sampling is also one of the main methods in current lunar exploration scientific research. The ability to easily obtain in-situ lunar soil samples at varying depths is of great importance for the study of lunar soil.

[0004] Therefore, this invention aims to systematically innovate the testing instrument based on the existing specific technologies and experience of CPT test and in-situ soil sampling test. While overcoming the extreme lunar environment and ensuring the accuracy of the lunar in-situ static cone penetration test, it can sample lunar soil at the target depth, thereby completing both soil property testing and sampling tasks in a single cone penetration test, and realizing high-precision and efficient in-situ test research on lunar soil. Summary of the Invention

[0005] This invention addresses the technical requirements for in-situ testing and sampling of lunar soil by providing a space static cone penetration test (SPPT) sampler and its usage method. Based on static cone penetration test technology, it enables fully automated in-situ testing and soil sampling of lunar soil.

[0006] The technical solution of the present invention is as follows: a space static penetration sampling instrument, comprising a signal acquisition system, a static penetration sampling system and a power system;

[0007] The signal acquisition system includes a host computer 23 and a data acquisition integration device box 27 connected to each other. The data acquisition integration device box 27 is connected to each sensor of the static penetration sampling system and is used to acquire the measurement results of the static penetration sampling system; it is used to measure physical parameters such as cone tip resistance, side friction resistance, temperature, and depth during the penetration process, as well as to sample lunar soil.

[0008] The static penetration sampling system includes a cone tip 1, a resistance platform 2, a connecting rod 3, a pressure platform 4, a one-way valve plate 5, a penetration tip 6, a vertical rod 7, a top pressure ring 8, a rotatable support 14, a "Y"-shaped cone tip resistance transmission support 16, and a cone tip resistance measuring pad 17; the cone tip 1, resistance platform 2, connecting rod 3, and pressure platform 4 are connected in sequence; the portal frame 11 has an inverted U-shaped cross-section, its horizontal beam contacts the pressure platform 4, and the top pressure ring 8 is arranged at the interface between the horizontal beam and the vertical column of the portal frame 11, and is located in the same plane as the horizontal beam;

[0009] One end of the rotatable support 14 is attached to the cone tip 1, and the other end is connected to the vertical end of the "Y"-shaped cone tip resistance transmission support 16; the inner sides of the two forks of the "Y"-shaped cone tip resistance transmission support 16 have cone tip resistance keyways 15; the interior of the vertical column of the portal frame 11 is a hollow slot for installing the temperature measuring pad 19; a vertical rod 7 is installed on the inner surface of the vertical column of the portal frame 11, one end of the vertical rod 7 is connected to the penetrating tip 6, and the other end is connected to the top bearing ring 8; the side friction cylinder 12 is fitted onto the outside of the vertical column of the portal frame 11, and the inner side of the side friction cylinder 12 is provided with a side friction resistance keyway 13; cone tip resistance keys 9 and... are arranged sequentially on the vertical column of the portal frame 11. Side friction resistance key 10; Conical tip resistance key 9 displaces within conical tip resistance keyway 15, and side friction resistance key 10 displaces within side friction resistance keyway 13; Conical tip resistance measuring pad 17 and side friction resistance measuring pad 18 both have built-in fiber optic strain sensors; Conical tip resistance measuring pad 17 is located in the groove inside the "Y"-shaped support 16 and is compressed by the vertical column of the portal frame 11; Side friction resistance measuring pad 18 is located at the top inside the side friction resistance keyway 13 and is compressed by the moving side friction resistance key 10; One-way valve plate 5 is composed of multi-lobed elastic plates, one end of which is hinged to the surface of the vertical rod 7, and the other end overlaps the surface of the connecting rod 3;

[0010] The power system, including a thrust system, a reaction system, and a control system, is used to provide power for the static penetration sampling system to complete the penetration sampling work.

[0011] The thrust system includes a solar panel 20, a motor 21, and a vertical motion module 22. The solar panel 20 supplies power to the motor 21 via a relay 24 and a regulator 25. The relay 24 is connected to the host computer 23 and the motor 21. The motor 21 is connected to the vertical motion module 22 to drive its movement. The vertical motion module 22 is connected to the pressure platform 4, the top pressure ring 8, and the vertical column of the portal frame 11. The reaction system has the same structure as the thrust system. The control system includes a host computer 23, a relay 24, a regulator 25, and a brake 26, which are used to control the operation of the thrust system and the reaction system.

[0012] The parameters obtained during the application of the aforementioned spatial static cone penetrometer are as follows;

[0013] As the cone tip 1 penetrates downwards, the magnitude of the cone tip resistance is obtained by the frequency reading of the fiber optic strain sensor.

[0014] The internal temperature change of the CPT probe is read by an optical fiber temperature sensor installed in the temperature measuring pad:

[0015]

[0016] In the formula: T This represents the change in internal temperature. K T This refers to the temperature sensing sensitivity coefficient of the fiber optic temperature sensor. λ This represents the change in the center wavelength of the fiber optic temperature sensor. λ B0 This is the wavelength corresponding to the fiber optic temperature sensor under strain-free conditions.

[0017] The temperature change at the resistance measurement point is equal to the value measured by the fiber optic temperature sensor, i.e., the resistance strain calculation formula is as follows:

[0018]

[0019] In the formula: This represents the change in resistance strain. The strain sensing sensitivity coefficient of the fiber optic strain sensor; T This represents the change in internal temperature. K T This refers to the temperature sensing sensitivity coefficient of the fiber optic temperature sensor. λ This represents the change in the center wavelength of the fiber optic temperature sensor. λ B0 This is the wavelength corresponding to the fiber optic temperature sensor under strain-free conditions.

[0020] The force model at the cone tip resistance measurement point is a cylindrical axial compression model with a uniform cross-section, and the resistance transmitted from the cone tip to the measurement point involves an angular change. The force-strain relationship is as follows:

[0021]

[0022] In the formula: For cone tip resistance; The cross-sectional area of ​​the cylinder at the cone tip resistance measurement point; The cylindrical elastic modulus at the cone tip resistance measurement point; The strain is measured at the cone tip resistance point. The angle between the rotating support and the resistance measurement support;

[0023] The force model at the side friction measurement point is an axial compression model of a cylinder with a uniform cross-section, and its force-strain relationship is as follows:

[0024]

[0025] In the formula: Side friction resistance; The cross-sectional area of ​​the cylinder at the point where the side friction resistance is measured; The elastic modulus of the cylinder at the measurement point of side friction resistance; The strain is measured at the resistance measurement point.

[0026] The method of using a spatial static cone penetrometer is characterized by the following steps:

[0027] Step (1): Install the space static penetration sampler on the lunar rover and connect the power system and signal acquisition system circuits to the solar panels; set the parameters of the power system and signal acquisition system to match each other, and operate synchronously with the lunar rover after setting.

[0028] Step (2): During the penetration process, the cone tip resistance is transmitted to the "Y"-shaped cone tip resistance transmission support 16 through the rotatable support 14, and is obtained through the cone tip resistance measurement point fixed at the "Y"-shaped cone tip resistance transmission support 16; the real-time side friction resistance is obtained through the side friction resistance measurement point of the side friction resistance keyway 13 in the vertical column of the portal frame 11; the temperature measurement points of the fiber optic temperature sensor are arranged at the corresponding positions of the cone tip resistance measurement point and the side friction resistance measurement point.

[0029] Step (3): After reaching the target depth, conduct a soil sampling test; the lunar rover presses down on the cone tip 1 and the soil sampler to open the rotatable support 14 outward and separate it from the cone tip 1. Then, it pulls the cone tip 1 into the soil sampler and continues to penetrate downward to fill the soil sampler with lunar soil. Pressing down on the cone tip 1 causes the one-way valve 5 to close. After the penetration is completed, the probe is pulled upward until it is exposed on the ground. The soil sampler is then removed and sealed.

[0030] The beneficial effects of this invention are as follows: This invention fully meets the specific technical and experience requirements of existing CPT tests and in-situ soil sampling tests, and systematically innovates the test instruments. While overcoming the extreme lunar environment and ensuring the accuracy of in-situ static cone penetration tests on the moon, it can sample lunar soil at the target depth. Thus, it can complete both soil property testing and sampling tasks in a single cone penetration test, achieving high-precision and efficient in-situ test research on lunar soil. Attached Figure Description

[0031] Figure 1 A schematic diagram of the T-shaped cone tip penetration section;

[0032] Figure 2 A schematic diagram of the soil sampling section;

[0033] Figure 3 This is a schematic diagram of a portal frame structure;

[0034] Figure 4 This is a schematic diagram of the side friction resistance sleeve structure;

[0035] Figure 5 Schematic diagram of Y-shaped cone tip resistance transmission support and rotatable support structure;

[0036] Figure 6 This is a top view of a space static cone penetrometer.

[0037] Figure 7 A schematic diagram of the signal acquisition system, power system, and reaction force system;

[0038] Figure 8 This is a schematic diagram of a space static cone penetration tester.

[0039] In the diagram: 1-Cone tip; 2-Resistance platform; 3-Connecting rod; 4-Pressure platform; 5-One-way valve plate; 6-Penetration tip; 7-Vertical rod; 8-Top pressure ring; 9-Cone tip resistance key; 10-Side friction resistance key; 11-Gantry frame; 12-Side friction cylinder; 13-Side friction resistance keyway; 14-Rotary support; 15-Cone tip resistance keyway; 16-“Y”-shaped cone tip resistance transmission support; 17-Cone tip resistance measuring pad; 18-Side friction resistance measuring pad; 19-Temperature measuring pad; 20-Solar panel; 21-Motor; 22-Vertical motion module; 23-Host computer; 24-Relay; 25-Regulator; 26-Brake; 27-Data acquisition integration device box. Detailed Implementation

[0040] A space static penetration sampling instrument includes a signal acquisition system, a static penetration sampling system, and a power system;

[0041] The signal acquisition system includes a host computer 23 and a data acquisition integration device box 27 connected to each other. The data acquisition integration device box 27 is connected to the various sensors of the static penetration sampling system and is used to measure physical parameters such as cone tip resistance, side friction resistance, temperature, and depth during the penetration process, as well as to sample lunar soil.

[0042] The static penetration sampling system includes a cone tip 1, a resistance platform 2, a connecting rod 3, a pressure platform 4, a one-way valve plate 5, a penetration tip 6, a vertical rod 7, a top pressure ring 8, a rotatable support 14, a "Y"-shaped cone tip resistance transmission support 16, and a cone tip resistance measuring pad 17; the cone tip 1, resistance platform 2, connecting rod 3, and pressure platform 4 are connected in sequence; the portal frame 11 has an inverted U-shaped cross-section, its horizontal beam contacts the pressure platform 4, and the top pressure ring 8 is arranged at the interface between the horizontal beam and the vertical column of the portal frame 11, and is located in the same plane as the horizontal beam;

[0043] One end of the rotatable support 14 is attached to the cone tip 1, and the other end is connected to the vertical end of the "Y"-shaped cone tip resistance transmission support 16; the inner sides of the two forks of the "Y"-shaped cone tip resistance transmission support 16 have cone tip resistance keyways 15; the interior of the vertical column of the portal frame 11 is a hollow slot for installing the temperature measuring pad 19; a vertical rod 7 is installed on the inner surface of the vertical column of the portal frame 11, one end of the vertical rod 7 is connected to the penetrating tip 6, and the other end is connected to the top bearing ring 8; the side friction cylinder 12 is fitted on the outside of the vertical column of the portal frame 11, and the inner side of the side friction cylinder 12 is provided with a side friction resistance keyway 13; cone tip resistances are arranged sequentially on the vertical column of the portal frame 11. Force key 9 and side friction resistance key 10; the cone tip resistance key 9 is displaced within the cone tip resistance keyway 15, and the side friction resistance key 10 is displaced within the side friction resistance keyway 13; the cone tip resistance measuring pad 17 has a built-in fiber optic strain sensor, which is located in the groove inside the "Y"-shaped support 16 and is compressed by the vertical column of the portal frame 11; the side friction resistance measuring pad 18 has a built-in fiber optic strain sensor, which is located at the top inside the side friction resistance keyway 13 and is compressed by the moving side friction resistance key 10; the one-way valve plate 5 is composed of 6 elastic plates, one end of which is hinged to the surface of the vertical rod 7, and the other end is attached to the surface of the connecting rod 3;

[0044] The power system, including a thrust system, a reaction system, and a control system, is used to provide power for the static penetration sampling system to complete the penetration sampling work.

[0045] The thrust system includes a solar panel 20, a motor 21, and a vertical motion module 22. The solar panel 20 supplies power to a relay 24. The relay 24 is connected to a host computer 23 and a motor 21. The motor 21 is connected to the vertical motion module 22 to drive its movement. The reaction system has the same structure as the thrust system. The control system includes a host computer 23, a relay 24, a regulator 25, and a brake 26, and is used to control the operation of the thrust system and the reaction system.

[0046] The cone tip 1 has an angle of 60° and a bottom diameter of 30mm. The cone bottom has a vertical protrusion of 2mm around its perimeter, and a resistance platform 2 protrudes in the middle, which together with the surrounding protrusions restricts the rotatable support 14. The resistance platform 2 is a cylinder with a bottom diameter smaller than the cone bottom diameter. The middle of the resistance platform 2 is connected to a connecting rod 3, and the top of the connecting rod 3 is connected to a pressure platform 4, which can realize the lifting and lowering of the cone tip 1.

[0047] The rotatable support 14 has its lower end overlapping the bottom surface of the cone tip 1 and its upper end riveted to the cone tip resistance transmission support 16. It can rotate outwards towards the CPT probe to open the cavity.

[0048] The cone-shaped resistance transmission support 16 is Y-shaped, with a C-shaped cone-shaped keyway 15 formed in the middle of the two teeth of the Y. The length of the cone-shaped resistance keyway 15 is greater than that of the cone-shaped resistance key teeth 9, allowing the cone-shaped resistance key teeth 9 to undergo partial displacement within the cone-shaped resistance keyway 15 when subjected to soil pressure and penetration force. The cone-shaped resistance measuring pad 17 can completely fill this interval. The cone-shaped resistance measuring pad 17 is located inside the groove of the Y-shaped support 16. During penetration, the pad is axially compressed, and its strain can be measured by a fiber optic strain sensor. The stress calculation adopts a rod axial compression model.

[0049] A "C"-shaped side friction resistance keyway 13 is opened in the middle of the side friction cylinder 12. The length of the side friction resistance keyway 13 is greater than that of the side friction resistance key tooth 10, which allows the side friction resistance key tooth 10 to undergo partial displacement within the side friction resistance keyway 13 after being subjected to soil friction force. The side friction resistance measuring pad can fill the upper space between the side friction resistance keyway 13 and the side friction resistance key tooth 10.

[0050] The side friction resistance measuring pad 17 is located in the top space of the side friction resistance keyway 13. During the penetration process, the pad is axially compressed, and its strain can be measured by an optical fiber strain sensor. Its stress calculation adopts the rod axial compression model.

[0051] The temperature measuring pad 19 is used to measure the temperature change inside the member caused by the sampled soil. It is located in the hollow slot inside the vertical column 11 of the portal frame and is not subject to external forces, so that the change in the wavelength parameter of the fiber optic temperature sensor located in the temperature measuring pad 19 is only caused by the temperature change.

[0052] The wide end of the one-way valve plate 5 is hinged to the junction of the top of the cone tip resistance transmission support and the inner wall. It can be folded into the internal cavity of the CPT. Under normal conditions, it is in a closed state. When the cone tip 1 is retracted upward, it can pass in the same direction. After the soil removal is completed, pressing down on the cone tip 1 will cause the valve plate 5 to be closed by force.

[0053] The tip 6 is welded to the bottom of the vertical rod 7. When the cone tip 1 is retrieved, pressing down the connecting rod 7 can separate the rotatable support 14 from the cone tip 1, thereby allowing the cone tip 1 to fall off freely, which is conducive to the retrieval of the cone tip 1.

[0054] The solar panels 20 are provided in 16 units, which can collect solar energy and convert it into electrical energy to power the propulsion system.

[0055] The motor 21 can receive solar energy and convert it into electrical energy, which can drive the linear module 22 to move.

[0056] Technical steps of a space static cone penetrometer:

[0057] (1) Equipment inspection - Assemble all types of structures, ensure that the overall structure meets the functions of each system, unfold and charge the solar panels, check whether the circuit is smooth, and test whether the instruments and sensors are sensitive.

[0058] (2) Resistance measurement - Set the motor penetration speed, turn on the data acquisition system, press down the entire bearing platform 4, the top bearing ring 8, and the vertical column 11 of the portal frame, and then penetrate into the soil. During the penetration process, the cone tip 1 is supported by the soil. The support force is transmitted to the "Y"-shaped cone tip resistance transmission support 16 through the rotatable support 14. Due to the presence of the sliding key, the vertical column 11 of the portal frame and the "Y"-shaped cone tip resistance transmission support 16 will have opposite displacements. The cone tip resistance measurement module 17 will be compressed, and the cone tip resistance can be measured. During the penetration process, the side friction cylinder 12 is subjected to the upward friction force of the soil. Due to the presence of the sliding key, the vertical column 11 of the portal frame and the side friction cylinder 12 will have relative displacements. The side friction resistance measurement module 17 will be compressed, and the side friction resistance can be measured.

[0059] (3) After the soil sampling and resistance measurement work is completed, the pressure platform 4 and the top pressure ring 8 are pressed down at the same time. The cone tip 1 can be separated from the rotatable support 14 during the pressing process. Further pressing down the top pressure ring 8 can open the rotatable support 14. The pressure platform 4 is pulled up so that the cone tip 1 is pulled back upward through the one-way valve plate 5. Further pressing down the top pressure ring 8 makes the sampling tip 6 continue to penetrate into the soil to the specified depth. After the cavity is filled with soil, the pressure platform 4 is pressed down so that the one-way valve plate 5 closes under the action of force. The whole device is lifted to complete the soil sampling work.

Claims

1. A space static cone penetration sampling instrument, characterized in that, The space static penetration sampling instrument includes a signal acquisition system, a static penetration sampling system, and a power system; The signal acquisition system includes a host computer (23) and a data acquisition integration device box (27) connected to the host computer (23). The data acquisition integration device box (27) is connected to each sensor of the static penetration sampling system and is used to acquire the measurement results of the static penetration sampling system. The static penetration sampling system includes a cone tip (1), a resistance platform (2), a connecting rod (3), a pressure platform (4), a one-way valve plate (5), a penetration tip (6), a vertical rod (7), a top pressure ring (8), a rotatable support (14), a "Y"-shaped cone tip resistance transmission support (16), and a cone tip resistance measuring pad (17); the cone tip (1), resistance platform (2), connecting rod (3), and pressure platform (4) are connected in sequence; the portal frame (11) has an inverted U-shaped cross section, its horizontal beam contacts the pressure platform (4), and the top pressure ring (8) is arranged at the interface between the horizontal beam and the vertical column of the portal frame (11), and is located on the same plane as the horizontal beam; One end of the rotatable support (14) is attached to the cone tip (1), and the other end is connected to the vertical end of the "Y"-shaped cone tip resistance transmission support (16); the inner sides of the two bifurcations of the "Y"-shaped cone tip resistance transmission support (16) are provided with cone tip resistance keyways (15); the interior of the vertical column of the portal frame (11) is a hollow slot for installing temperature measuring pads (19); a vertical rod (7) is installed on the inner surface of the vertical column of the portal frame (11), one end of the vertical rod (7) is connected to the penetrating tip (6), and the other end is connected to the top bearing ring (8); the side friction cylinder (12) is fitted on the outside of the vertical column of the portal frame (11), and the inner side of the side friction cylinder (12) is provided with a side friction resistance keyway (13); cone tip resistance key teeth (9) are arranged sequentially on the vertical column of the portal frame (11). ) and side friction resistance key (10); the cone tip resistance key (9) is displaced in the cone tip resistance keyway (15), and the side friction resistance key (10) is displaced in the side friction resistance keyway (13); both the cone tip resistance measuring pad (17) and the side friction resistance measuring pad (18) are equipped with fiber optic strain sensors; the cone tip resistance measuring pad (17) is located in the groove inside the "Y"-shaped support (16) and is compressed by the vertical column of the portal frame (11); the side friction resistance measuring pad (18) is located at the top inside the side friction resistance keyway (13) and is compressed by the moving side friction resistance key (10); the one-way valve plate (5) is composed of multiple elastic plates, one end of which is hinged to the surface of the vertical rod (7), and the other end is attached to the surface of the connecting rod (3); The power system, including a thrust system, a reaction system, and a control system, is used to provide power for the static penetration sampling system to complete the penetration sampling work.

2. The space static cone penetration tester according to claim 1, characterized in that, The thrust system includes a solar panel (20), a motor (21), and a vertical motion module (22). The solar panel (20) supplies power to the motor (21) through a relay (24) and a regulator (25). The relay (24) is connected to the host computer (23) and the motor (21) respectively. The motor (21) is connected to the vertical motion module (22) to drive its movement. The vertical motion module (22) is connected to the pressure platform (4), the top pressure ring (8), and the vertical column of the gantry frame (11). The reaction system has the same structure as the thrust system. The control system includes a host computer (23), a relay (24), a regulator (25), and a brake (26) for controlling the operation of the thrust system and the reaction system.

3. The space static cone penetrometer according to claim 1 or 2, characterized in that, The parameters obtained during application are as follows; When the cone tip (1) penetrates downwards, the magnitude of the cone tip resistance is obtained by the frequency reading of the fiber optic strain sensor; The internal temperature change of the CPT probe is read by an optical fiber temperature sensor installed in the temperature measuring pad: In the formula: ΔT is the internal temperature change; K T λ is the temperature sensing sensitivity coefficient of the fiber optic temperature sensor; Δλ is the change in the center wavelength of the fiber optic temperature sensor; λ B0 This represents the wavelength corresponding to the fiber optic temperature sensor under strain-free conditions. The temperature change at the resistance measurement point is equal to the value measured by the fiber optic temperature sensor, i.e., the resistance strain calculation formula is as follows: In the formula: Δε is the change in resistance strain; K ε ΔT is the strain sensing sensitivity coefficient of the fiber optic strain sensor; K is the internal temperature change. T λ is the temperature sensing sensitivity coefficient of the fiber optic temperature sensor; Δλ is the change in the center wavelength of the fiber optic temperature sensor; λ B0 This represents the wavelength corresponding to the fiber optic temperature sensor under strain-free conditions. The force model at the cone tip resistance measurement point is an axial compression model of a cylinder with a uniform cross-section, and the resistance transmitted from the cone tip to the measurement point involves an angular change. The force-strain relationship is as follows: q c =S qc E qc No qc cos 2 θ-S fs E fs No fs In the formula: q c For cone tip resistance; S qc E represents the cross-sectional area of ​​the cylinder at the point where the cone tip resistance is measured. qc The elastic modulus of the cylinder at the cone tip resistance measurement point; Δε qc θ represents the strain at the cone tip resistance measurement point; θ is the angle between the rotating support and the resistance measurement support. The force model at the side friction measurement point is an axial compression model of a cylinder with a uniform cross-section, and its force-strain relationship is as follows: f s =S fs E fs No fs In the formula: f s Side friction resistance; S fs E represents the cross-sectional area of ​​the cylinder at the point where the side friction resistance is measured. fs The elastic modulus of the cylinder at the point where the side friction resistance is measured; Δε fs The strain is measured at the resistance measurement point.

4. A method of using a spatial static cone penetrometer as described in any one of claims 1-3, characterized in that, The steps include the following: Step (1): Install the space static penetrometer on the lunar rover and connect the power system and signal acquisition system circuits to the solar panels; set the parameters of the power system and signal acquisition system to match each other, and operate synchronously with the lunar rover after setting. Step (2): During the penetration process, the cone tip resistance is transmitted to the "Y"-shaped cone tip resistance transmission support (16) through the rotatable support (14), and is obtained through the cone tip resistance measurement point fixed at the "Y"-shaped cone tip resistance transmission support (16); the real-time side friction resistance is obtained through the side friction resistance measurement point of the side friction resistance keyway (13) in the vertical column of the portal frame (11); the temperature measurement points of the fiber optic temperature sensor are arranged at the corresponding positions of the cone tip resistance measurement point and the side friction resistance measurement point. Step (3): After reaching the target depth, a soil sampling test is carried out. The lunar rover presses down the cone tip (1) and the soil sampler to open the rotatable support (14) outward and separate it from the cone tip (1). Then, the cone tip (1) is pulled into the soil sampler and the soil sampler is continued to penetrate downward to fill the soil sampler with lunar soil. The cone tip (1) is pressed down to close the one-way valve plate (5). After the penetration is completed, the probe is pulled upward until it is exposed to the ground. The soil sampler is then taken out and sealed.

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