A multi-mode controlled deep well geostress monitoring probe

Abstract

This invention belongs to the field of geostress monitoring technology and discloses a multi-mode controlled deep well geostress monitoring probe, comprising: a base, serving as the supporting structure for the entire geostress monitoring probe; the multi-mode monitoring structure includes: a guide seat, a clamping structure, a motor base, a first drive component, a meshing structure, a second drive component, a threaded drive structure, a plate, a guide wedge, a piezomagnetic sensor, and a wedge seat; the clamping structure is connected to the base through the guide seat. Through the synergistic effect of the multi-mode monitoring structure, the monitoring probe can accurately complete stress monitoring at multiple circumferential points on the borehole's circular cross-section, breaking through the limitations of traditional single-point monitoring. After the stress data at each point is summarized and processed, it can completely present the stress distribution characteristics of the circular cross-section structure such as the inner wall of the deep well, avoiding the deviation of single-point stress monitoring, and providing comprehensive and objective data support for the assessment of the real-time continuous changes in deep geostress state.

Description

Technical Field

[0001] This invention belongs to the field of geostress monitoring technology, and in particular relates to a multi-mode controlled deep well geostress monitoring probe. Background Technology

[0002] In deep underground engineering (such as mining, tunnel excavation, underground gas storage construction, etc.) and scientific observation of fault activity, understanding the changes in the in-situ stress state of deep boreholes is crucial to the safety and stability of the project, and is also of great significance to the evolution of crustal stress field observation. At present, traditional stress monitoring methods have problems such as low accuracy and inability to monitor in real time for a long time.

[0003] Some single-point monitoring methods cannot fully reflect the stress distribution of the entire circular cross section, making it difficult to accurately assess the stress state of the engineering structure, which in turn affects the design and construction decisions of the project. Summary of the Invention

[0004] This invention addresses the problems of low accuracy and inability to perform long-term real-time monitoring in traditional stress monitoring methods. Furthermore, some single-point monitoring methods cannot comprehensively reflect the stress distribution across the entire circular cross-section, making it difficult to accurately assess the stress state of engineering structures and thus affecting engineering design and construction decisions. The invention proposes the following technical solution:

[0005] A multi-mode controlled deep well ground stress monitoring probe includes: a base, serving as a support structure for the entire ground stress monitoring probe; the multi-mode monitoring structure includes: a guide seat, a clamping structure, a motor base, a first drive component, a meshing structure, a second drive component, a threaded drive structure, a plate, a guide wedge, a piezomagnetic sensor, and a wedge seat; the clamping structure is connected to the base via the guide seat, the motor base is connected above the base, the first drive component and the second drive component are connected to the base via the motor base, the first drive component is connected to the base via the meshing structure, the second drive component is connected to the plate via the threaded drive structure, the plate is connected to the guide wedge, the guide wedge is connected to the base via the wedge seat, and the piezomagnetic sensor is disposed inside the clamping structure;

[0006] The first driving component drives the motor seat to revolve around the base through the meshing structure, so that the second driving component can complete the circumferential posture switching around the base. The second driving component drives the plate to squeeze the guide wedge through the threaded driving structure, so that the guide wedge moves vertically along the inside of the wedge seat, drives the clamping structure to expand radially, so that the clamping structure contacts the object and establishes a pre-tightening force before abutting against the magnetic sensor, so that the magnetic sensor senses the stress change and converts it into an electrical signal output.

[0007] As a preferred embodiment of the above technical solution, the meshing structure is composed of a sun gear and planet gears, wherein the sun gear is connected to the base body, and the planet gears are coaxially connected to the power output shaft of the drive component.

[0008] As a preferred embodiment of the above technical solution, the clamping structure is composed of two sets of corrugated metal strips and two metal blocks to form a symmetrical elastic clamping unit, wherein the piezomagnetic sensor is snapped between the two metal blocks, the outer sides of the two metal blocks are connected by corrugated metal strips, and the other two corrugated metal strips are fixedly connected to the guide seat.

[0009] As a preferred embodiment of the above technical solution, the wedge block seat is provided with a guide groove that fits the guide wedge block, and the wedge block seat is provided with a drainage groove. The opening diameter at the top of the drainage groove is smaller than the opening diameter at the bottom, forming a wedge-shaped guide cavity that is narrow at the top and wide at the bottom. The bottom diameter of the drainage groove is equal to the width of the plate, and the top diameter of the drainage groove is greater than the outer diameter of the threaded drive structure.

[0010] As a preferred embodiment of the above technical solution, a positioning component is installed inside the guide seat, and the two ends of the positioning component are respectively connected to the guide seat and the guide wedge, with the outer side of the plate and the inner wall of the guide wedge fitting together.

[0011] As a preferred embodiment of the above technical solution, the top of the motor base is provided with a threaded sleeve, the outer side of the threaded sleeve is connected to a concave sleeve, the inner wall of the concave sleeve is provided with a limiting block that is slidably connected to the interior of the base, the limiting block is rectangular in shape, and the top of the base is provided with a pressure sensor.

[0012] As a preferred embodiment of the above technical solution, the substrate has a top plate inside, a magnetic component one at the bottom of the top plate, a magnetic component two at the bottom of the magnetic component one, and a locking block on the outside of the magnetic component two, the locking block being slidably connected to the inside of the substrate.

[0013] As a preferred embodiment of the above technical solution, the top of the motor base is provided with a snap-fit ​​groove, which is composed of an annular groove, a radial limiting protrusion and a positioning hole. The bottom of the snap-fit ​​block has the same shape as the positioning hole, which is triangular. The radial limiting protrusion is used to block the snap-fit ​​block.

[0014] As a preferred embodiment of the above technical solution, the contraction distance between the clamping structure and the axis of the substrate is less than the distance between the maximum outer diameter of the substrate and the axis, and the extension distance between the clamping structure and the axis of the substrate is greater than the distance between the maximum outer diameter of the substrate and the axis.

[0015] The beneficial effects of this invention are as follows:

[0016] (1) Through the synergistic effect of the multi-mode monitoring structure, the monitoring probe can accurately complete stress monitoring at multiple circumferential points on the borehole cross section, breaking through the limitations of traditional single-point monitoring. After the stress data at each point is summarized and processed, it can fully present the stress distribution characteristics of the circular cross section structure such as the inner wall of the deep well, avoid the deviation of single-point stress monitoring, and provide comprehensive and objective data support for the assessment of the real-time continuous change of deep geostress state.

[0017] (2) The rotation amplitude of the motor base is monitored in real time by pressure sensor. Combined with the card block limit structure driven by magnetic repulsion, a dual protection mechanism is formed: it avoids the risk of cable entanglement caused by continuous unidirectional rotation of the drive component, and accurately controls the revolution range of the motor base through 330° forward limit and 15° reverse limit, so as to ensure the safety and controllability of the equipment in complex deep well environment and extend the service life of the equipment. Attached Figure Description

[0018] Figure 1 The diagram shown is a structural schematic of a multi-mode controlled deep well ground stress monitoring probe in Example 1;

[0019] Figure 2 The image shown is a cross-sectional view of a multi-mode controlled deep well ground stress monitoring probe according to Example 1;

[0020] Figure 3 The diagram shown is a cross-sectional view of the substrate in Example 1;

[0021] Figure 4 The diagram shown is a schematic diagram of the installation structure of the positioning component in Embodiment 1;

[0022] Figure 5 The diagram shown is a schematic of the installation structure of the guide wedge in Embodiment 1;

[0023] Figure 6 The diagram shown is a schematic of the installation structure of the threaded sleeve in Embodiment 1;

[0024] Figure 7 The diagram shown is a cross-sectional view of the card block in Embodiment 1;

[0025] Figure 8 The diagram shown is a schematic of the installation structure of the guide wedge in Embodiment 1;

[0026] Figure 9 The diagram shown is a schematic of the installation structure of a multi-mode controlled deep well ground stress monitoring probe in Example 1.

[0027] In the diagram: 1. Base; 2. Guide seat; 3. Clamping structure; 4. Motor seat; 5. Drive component one; 6. Meshing structure; 7. Drive component two; 8. Threaded drive structure; 9. Plate; 10. Guide wedge; 11. Piezomagnetic sensor; 12. Positioning component; 13. Wedge seat; 14. Locking block; 15. Threaded sleeve; 16. Concave sleeve; 17. Limiting block; 18. Pressure sensor; 19. Top plate; 20. Magnetic component one; 21. Magnetic component two; 22. Locking groove. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0029] Example 1

[0030] This invention provides a multi-mode controlled deep well geostress monitoring probe, such as... Figures 1 to 9 As shown, it includes: a base 1 and a multi-mode monitoring structure; the base 1 serves as the supporting structure for the entire geostress monitoring probe; the multi-mode monitoring structure includes: a guide seat 2, a clamping structure 3, a motor seat 4, a first drive component 5, a meshing structure 6, a second drive component 7, a threaded drive structure 8, a plate 9, a guide wedge 10, a piezomagnetic sensor 11, and a wedge seat 13; the clamping structure 3 is connected to the base 1 via the guide seat 2, the motor seat 4 is connected above the base 1, the first drive component 5 and the second drive component 7 are connected to the base 1 via the motor seat 4, the first drive component 5 is connected to the base 1 via the meshing structure 6, and the second drive component 7 is connected to the base 1 via the threaded drive structure 8. The clamping structure 3 is connected to plate 9, which in turn connects to guide wedge 10. Guide wedge 10 is connected to base 1 via wedge seat 13. A piezomagnetic sensor 11 is located inside the clamping structure 3. Driver 5 drives motor seat 4 to revolve around base 1 via meshing structure 6, allowing driver 7 to complete circumferential position switching around base 1. Driver 7 drives plate 9 to press guide wedge 10 via threaded drive structure 8, causing guide wedge 10 to move vertically along the inside of wedge seat 13. (The outer edge of the top of guide wedge 10 near clamping structure 3 is an inclined surface, while the two surfaces of guide wedge 10 inside wedge seat 13 are vertical surfaces.) Figure 8 As shown), the clamping structure 3 is driven to expand radially, so that the clamping structure 3 first expands radially to contact the well wall to establish a pre-tightening force, and then contracts towards the base 1 under pressure, thereby abutting against the compressive magnetic sensor 11, so that the magnetic sensor 11 senses the stress change and converts it into an electrical signal output.

[0031] Existing single-point monitoring methods cannot fully reflect the stress distribution of the entire circular cross section, making it difficult to accurately assess the stress state of the engineering structure, which in turn affects the design and construction decisions of the project.

[0032] To this end, a multi-mode monitoring structure was designed. The piezomagnetic sensor 11 can perform stress monitoring at multiple circumferential points on the borehole's circular cross-section. After the stress data at each point is collected and processed, it can fully present the stress distribution characteristics of the entire circular cross-section, avoiding the deviation of single-point stress monitoring. This provides comprehensive and objective data support for the assessment of the real-time and continuous changes in deep ground stress state, ensuring the scientific nature of engineering design and construction decisions. Through the action of the multi-mode monitoring structure, the ground stress piezomagnetic sensor 11 can realize multi-point stress monitoring at different orientations of the circular cross-section, thereby comprehensively reflecting the stress distribution of the entire circular cross-section.

[0033] In use, the base 1 is installed on the inner wall of the deep well, and then the drive component 2 7 is started. When the drive component 2 7 runs, it drives the threaded drive structure 8 to rotate. When the threaded drive structure 8 rotates, it drives the plate 9 to move inside the guide wedge 10 through the thread, thereby driving the guide wedge 10 to move downward along the inside of the wedge seat 13. When the guide wedge 10 moves downward, it passes through the inclined surface ( Figure 8 (As shown) Drive the clamping structure 3 to move towards the inner wall of the deep well, so that the clamping structure 3 contacts the corresponding point on the inner wall of the deep well and establishes a stable pre-tightening force. Then the clamping structure 3 compresses and abuts against the piezomagnetic sensor 11, ensuring that the piezomagnetic sensor 11 can accurately sense the stress change at that point and convert it into an electrical signal output.

[0034] Next, drive component 2 7 is started. When drive component 2 7 is running, it drives the plate 9 to reset through the threaded drive structure 8. Then drive component 1 5 is started. When drive component 1 5 is running, it drives the meshing structure 6 to run. When the meshing structure 6 is running, it causes the motor base 4 to rotate outside the base 1. At this time, it drives drive component 2 7, threaded drive structure 8 and plate 9 to enter above the second guide wedge 10. Then drive component 2 7 is run repeatedly. At this time, drive component 2 7 moves the second guide wedge 10 downward according to the above process. At this time, the stress is measured at the second point on the inner wall of the deep well through the action of clamping structure 3 and piezomagnetic sensor 11.

[0035] Specifically, a guide seat 2 (specifically a ring) is fixedly installed on the outer side of the base 1. The guide seat 2 coincides with the axis of the base 1. A clamping structure 3 (eight clamping structures 3 arranged circumferentially around the axis of the base 1) is fixedly installed on the outer side of the guide seat 2. The clamping structure 3 is composed of two sets of corrugated metal strips and two metal blocks, forming a symmetrical elastic clamping unit. A piezomagnetic sensor 11 is snapped between the two metal blocks. The outer sides of the two metal blocks are connected by corrugated metal strips, which absorb displacement compensation during the loading process through elastic deformation. The outer sides of the metal blocks are fixedly connected to the guide seat 2 by two other corrugated metal strips. The top of the outer side of the base 1 A motor base 4 is rotatably connected. A drive component 5 is mounted on the top of the motor base 4 via screws. The output shaft of the drive component 5 is connected to a meshing structure 6, which consists of a sun gear and planetary gears. The sun gear is connected to the base 1 via a key, forming a fixed central gear for the revolution trajectory. The planetary gears are coaxial with the power output shaft of the drive component 5 and connected via keys, participating in the meshing transmission. Utilizing the planetary gear transmission principle, the rotational motion of the drive component 5 is converted into the revolution motion of the motor base 4. A second drive component 7 is threadedly connected to one side of the top of the motor base 4. The bottom end of the second drive component 7 is keyed to a threaded drive structure 8 (specifically a threaded rod). A wedge seat 13 is fixedly installed on the outer side of the 1. Multiple guide wedges 10 are slidably connected inside the wedge seat 13. A plate 9 is vertically movably connected inside one of the guide wedges 10. The plate 9 has an internal threaded hole at its center, which engages with the threaded drive structure 8 via a threaded connection. A vertical guide groove is provided inside the wedge seat 13, which mates with the vertical surfaces on both sides of the guide wedge 10, restricting its movement to vertical only. A drainage groove is provided inside the wedge seat 13. The diameter of the drainage groove is equal to the width of the plate 9, allowing the plate 9 to rotate circumferentially around the center of the wedge seat 13 within the drainage groove. The diameter of the drainage groove is larger than the outer diameter of the threaded drive structure 8, allowing the threaded drive structure 8 to rotate around the wedge seat 13 within the drainage groove. The center rotates circumferentially. The contraction distance between the clamping structure 3 and the axis of the base 1 is less than the distance between the maximum outer diameter of the base 1 and the axis (when the clamping structure 3 is in a contracted state (not squeezed), the distance between its outermost point and the axis of the base 1 (contraction radius) is less than the maximum radius of the base 1). The extension distance between the clamping structure 3 and the axis of the base 1 is greater than the distance between the maximum outer diameter of the base 1 and the axis (when the clamping structure 3 is in an expanded state (squeezed by the guide wedge 10), the distance between its outermost point and the axis of the base 1 (expansion radius) is greater than the maximum radius of the base 1), so that the clamping structure 3 can move outward and contact the inner wall of the deep well.

[0036] like Figure 2 , Figure 3 and Figure 8Since the guide wedge 10 is moved downward by the plate 9, and it is inconvenient to reset the guide wedge 10 after it moves downward, a positioning element 12 is installed inside the guide seat 2. The two ends of the positioning element 12 are respectively connected to the guide seat 2 and the guide wedge 10. Figure 3 As shown), the outer side of plate 9 and the inner wall of guide wedge 10 are in contact with each other.

[0037] When in use, the plate 9 drives the guide wedge 10 to move downward. When the guide wedge 10 moves downward, it squeezes the positioning member 12, causing the positioning member 12 to contract. When the plate 9 rises, the plate 9 drives the guide wedge 10 to rise, and when the guide wedge 10 rises, it causes the positioning member 12 to stretch.

[0038] Specifically, a positioning component 12 (specifically a telescopic rod, composed of a positioning sleeve and a movable sleeve, wherein the movable sleeve is connected to the inside of the positioning sleeve by friction sliding) is installed inside the guide seat 2. A circular hole is opened inside the guide seat 2 corresponding to the bottom end of the positioning component 12. The positioning component 12 is located inside the circular hole. The two ends of the positioning component 12 are respectively connected to the guide seat 2 and the guide wedge 10. The outer side of the plate 9 and the inner wall of the guide wedge 10 are in contact with each other to limit the plate 9 and prevent the plate 9 from swinging on the inner wall of the guide wedge 10.

[0039] like Figure 2 and Figure 3 As shown, since the driving component 5 can drive the motor base 4 to rotate through the meshing structure 6 when it is running, it is necessary to provide a warning after the driving component 5 rotates to prevent the driving component 5 from rotating in one direction and causing the connection wire between the driving component 5 and the power supply to become entangled. For this purpose, the top of the motor base 4 is provided with a threaded sleeve 15, and a concave sleeve 16 is connected to the outside of the threaded sleeve 15. The inner wall of the concave sleeve 16 is provided with a limiting block 17 that is slidably connected to the inside of the base 1. The limiting block 17 is rectangular in shape, and a pressure sensor 18 is provided at the top of the base 1.

[0040] When the motor base 4 rotates, it drives the threaded sleeve 15 to rotate synchronously. Since the concave sleeve 16 is connected to the base 1 through the limiting block 17 (the limiting block 17 restricts the concave sleeve 16 from rotating), the rotation of the threaded sleeve 15 will force the concave sleeve 16, which is threadedly engaged with it, to move downward in the axial direction (vertical direction). The downward movement of the concave sleeve 16 drives the limiting block 17 to slide downward along the rectangular hole inside the base 1. When the limiting block 17 descends, it squeezes the pressure sensor 18. The pressure sensor 18 changes its value due to the squeezing force. The value transmitted by the pressure sensor 18 monitors the descent depth of the limiting block 17, thereby indirectly monitoring the rotation amplitude of the threaded sleeve 15, and further indirectly monitoring the rotation amplitude of the motor base 4.

[0041] Specifically, a threaded sleeve 15 is fixedly installed at the top of the motor base 4 on the outside of the base 1. A concave sleeve 16 is threadedly connected to the outside of the threaded sleeve 15. A limiting block 17 is fixedly connected to the inner wall of the concave sleeve 16 and slidably connected to the inside of the base 1. The limiting block 17 is rectangular in shape. A rectangular hole is opened at the top of the base 1 corresponding to the bottom of the limiting block 17. The limiting block 17 is slidably connected to the inside of the base 1 through the rectangular hole. A pressure sensor 18 is snapped on at the bottom of the limiting block 17 (the end of the running trajectory of the limiting block 17) at the top of the base 1.

[0042] like Figure 6 As shown, in order to facilitate the physical limitation of the rotation of the motor base 4, so that the motor base 4 can only rotate to a certain range (the maximum forward rotation of the motor base 4 is 330° and the maximum reverse rotation is 15°) for positioning, the base 1 is provided with a top plate 19, the bottom end of the top plate 19 is provided with a magnetic component 20, the bottom end of the magnetic component 20 is provided with a magnetic component 21, and the outside of the magnetic component 21 is provided with a locking block 14. The locking block 14 is slidably connected to the inside of the base 1. The top end of the motor base 4 is provided with a locking groove 22, which is composed of an annular groove, a radial limiting protrusion and a positioning hole. The bottom end of the locking block 14 has the same shape as the positioning hole, which is trapezoidal. The radial limiting protrusion is used to block the locking block 14.

[0043] During use, the repulsive force between magnetic component 21 and magnetic component 20 keeps the bottom of the locking block 14 inside the annular track. When the motor base 4 rotates in the forward direction, the locking block 14 moves along the inside of the annular groove. When it enters the upper part of the positioning hole, magnetic component 21 is driven to move downward under the action of magnetic component 20 at the bottom of the top plate 19. When magnetic component 21 moves downward, it drives the locking block 14 into the positioning hole. At this time, the vertical surfaces between the bottom of the locking block 14 and the positioning hole are in contact with each other, so that the locking block 14 cannot continue to rotate.

[0044] When the motor base 4 rotates in the reverse direction, the inclined surface between the locking block 14 and the positioning hole causes the locking block 14 to rise as the motor base 4 rotates. When the locking block 14 rises, it drives the magnetic component 21 to rise, which shortens the distance between the magnetic component 21 and the magnetic component 20. This increases the repulsive force between the magnetic component 20 and the magnetic component 21. As the rotation continues, when the vertical surface above the inclined surface of the locking block 14 contacts the radial limiting protrusion, the locking block 14 is limited, thereby limiting the rotation amplitude of the motor base 4.

[0045] Specifically, a top plate 19 is fixedly installed inside the base 1. A magnetic component 20 is embedded at the bottom of the top plate 19. A locking block 14 is slidably connected inside the base 1 below the top plate 19. A magnetic component 21 is locked inside the locking block 14 (both magnetic components 21 and 20 are magnets, and the magnetic poles on their opposite sides are the same (i.e., both are N poles or both are S poles)). The top of the motor base 4 is provided with a locking groove 22, which is composed of an annular groove, a radial limiting protrusion, and a positioning hole. The bottom of the locking block 14 has the same shape as the positioning hole, both being trapezoidal. The size of the positioning hole is larger than the size of the bottom of the locking block 14. The radial limiting protrusion is used to block the locking block 14, thereby limiting the rotation range of the locking block 14 and thus limiting the rotation range of the motor base 4.

[0046] Working principle: In actual use, the base 1 of the monitoring probe is fixed to the inner wall of the deep well to ensure the overall stability of the probe. Then, the driving component 7 is activated to drive the threaded driving structure 8 to rotate. The rotation of the threaded driving structure 8 causes the plate 9 to move downward inside the guide wedge 10. The guide wedge 10 slides downward along the vertical guide groove of the wedge seat 13. The inclined surface of the guide wedge 10 squeezes the clamping structure 3, forcing it to expand radially to contact the well wall and establish a pre-tightening force. The reaction force of the well wall causes the clamping structure 3 to contract towards the base 1, compressing the piezomagnetic sensor 11. The piezomagnetic sensor 11 senses the stress change and outputs an electrical signal to complete the measurement of the current point. During this process, when the guide wedge 10 moves downward, it drives the positioning component 12 to compress, and the self-locking performance of the positioning component 12 fixes the position of the guide wedge 10.

[0047] Next, the second drive component 7 rotates in the opposite direction, and the threaded drive structure 8 drives the plate 9 to move upward and reset. At this time, the plate 9 is reset, and then the rotation of the first drive component 5 is converted into the revolution of the motor base 4 through the meshing structure 6 (sun gear-planet gear system). The motor base 4 drives the second drive component 7, the threaded drive structure 8 and the plate 9 to revolve, and move to the top of the next guide wedge 10. The second drive component 7 is restarted again, driving the threaded drive structure 8 to rotate. The rotation of the threaded drive structure 8 drives the plate 9 to move downward inside the guide wedge 10, pushing the next guide wedge 10 to slide downward along the vertical guide groove of the wedge seat 13. The inclined surface of the next guide wedge 10 squeezes the clamping structure 3, forcing it to expand radially to contact the well wall and establish a pre-tightening force. The reaction force of the well wall causes the clamping structure 3 to contract towards the base 1, compressing the magnetic piezometer 11. The magnetic piezometer 11 senses the stress change and outputs an electrical signal to perform stress measurement at the new point. After all the guide wedges 10 have moved downward, the multi-directional stress data acquisition of the circular cross section is completed.

[0048] Then continue running the above method, so that all guide wedges 10 move downward again, so that all guide wedges 10 enter the predetermined second position, and complete the acquisition of different stress data of the circular cross section in multiple directions.

[0049] When one of the piezomagnetic sensors 11 collects different data, the driving principle described above is used to make the driving component 2 7 enter above the piezomagnetic sensor 11. Then, the driving component 2 7 pushes the guide wedge block 10 to continue to move down through the plate 9, so that the data transmitted by the piezomagnetic sensor 11 is the same as the data transmitted by all the other piezomagnetic sensors 11.

[0050] Finally, the second driving component 7 drives the plate 9 to move upward through the threaded driving structure 8. When the plate 9 moves upward, it drives the guide wedge 10 to rise. When the guide wedge 10 rises, it drives the positioning component 12 to stretch. When the guide wedge 10 is reset, the first driving component 5 is then started. At this time, the threaded driving structure 8 drives the plate 9 to move downward and reset. When the plate 9 is reset, the rotation of the first driving component 5 is converted into the revolution of the motor base 4 through the meshing structure 6 (sun gear-planet gear system). The motor base 4 drives the second driving component 7, the threaded driving structure 8 and the plate 9 to revolve and move to the top of the next guide wedge 10. The above steps are continued so that the second guide wedge 10 is reset. After all the guide wedges 10 are reset in sequence, the entire set of guide wedges 10 is reset.

[0051] Furthermore, during the aforementioned process, as the motor base 4 revolves, the threaded sleeve 15 rotates synchronously, forcing the concave sleeve 16 to move downward along the limiting block 17. The limiting block 17 presses against the bottom pressure sensor 18, and the rotation angle is calculated by the pressure value to prevent cable entanglement. Simultaneously, when rotating in the forward direction to the positioning hole, the locking block 14 enters the positioning hole due to the mutual repulsion between the magnetic component 21 and the magnetic component 20, and the trapezoidal vertical surface locks (maximum 330°). When rotating in the reverse direction, the inclined surface of the positioning hole lifts the locking block 14, which shortens the distance between the magnetic component 21 and the magnetic component 20, thereby increasing the repulsion between the magnetic component 21 and the magnetic component 20. After the locking block 14 enters the annular groove, it is impossible to continuously press the locking block 14. At this time, under the action of the repulsion between the magnetic component 21 and the magnetic component 20, the bottom surface of the locking block 14 continuously adheres to the annular groove and moves circumferentially along the inside of the annular groove. When the locking block 14 contacts the radial limiting protrusion, it is forcibly stopped (maximum 15°).

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A multi-mode controlled deep well geostress monitoring probe, characterized in that, include: The substrate (1) serves as the supporting structure for the entire geostress monitoring probe; The multi-mode monitoring structure includes: a guide seat (2), a clamping structure (3), a motor seat (4), a drive component one (5), a meshing structure (6), a drive component two (7), a threaded drive structure (8), a plate (9), a guide wedge (10), a piezomagnetic sensor (11), and a wedge seat (13); the clamping structure (3) is connected to the base (1) through the guide seat (2), the motor seat (4) is connected above the base (1), the drive component one (5) and the drive component two (7) are connected to the base (1) through the motor seat (4), the drive component one (5) is connected to the base (1) through the meshing structure (6), the drive component two (7) is connected to the plate (9) through the threaded drive structure (8), and the plate (9) is connected to the guide wedge (10). The wedge (10) is connected, and the guide wedge (10) is connected to the base (1) through the wedge seat (13). The piezomagnetic sensor (11) is located inside the clamping structure (3). The first driving member (5) drives the motor seat (4) to revolve around the base (1) through the meshing structure (6), so that the second driving member (7) completes the circumferential pose switching around the base (1). The second driving member (7) squeezes the guide wedge (10) through the threaded driving structure (8) and the driving plate (9), so that the guide wedge (10) moves vertically along the inside of the wedge seat (13), driving the clamping structure (3) to expand radially, so that the clamping structure (3) contacts the object and establishes a pre-tightening force before abutting against the piezomagnetic sensor (11), so that the piezomagnetic sensor (11) senses the stress change and converts it into an electrical signal output. The clamping structure (3) is composed of two sets of corrugated metal strips and two metal blocks to form a symmetrical elastic clamping unit. The magnetic sensor (11) is snapped between the two metal blocks. The two metal blocks are connected by corrugated metal strips on their outer sides. The other two corrugated metal strips are fixedly connected to the guide seat (2). The motor base (4) is provided with a threaded sleeve (15) at the top. A concave sleeve (16) is connected to the outside of the threaded sleeve (15). A limiting block (17) is provided on the inner wall of the concave sleeve (16) and is slidably connected to the inside of the base (1). The limiting block (17) is rectangular in shape. A pressure sensor (18) is provided at the top of the base (1).

2. The multi-mode controlled deep well geostress monitoring probe according to claim 1, characterized in that, The meshing structure (6) is composed of a sun gear and planet gears, wherein the sun gear is connected to the base (1) and the planet gears are coaxially connected to the power output shaft of the drive component (5).

3. The multi-mode controlled deep well geostress monitoring probe according to claim 1, characterized in that, The wedge seat (13) is provided with a guide groove that fits the guide wedge (10) inside. The wedge seat (13) is provided with a drainage groove inside. The opening diameter of the top of the drainage groove is smaller than the opening diameter of the bottom, forming a wedge-shaped guide cavity that is narrow at the top and wide at the bottom. The bottom diameter of the drainage groove is equal to the width of the plate (9), and the top diameter of the drainage groove is greater than the outer diameter of the threaded drive structure (8).

4. The multi-mode controlled deep well geostress monitoring probe according to claim 1, characterized in that, The guide seat (2) is equipped with a positioning component (12), and the two ends of the positioning component (12) are respectively connected to the guide seat (2) and the guide wedge (10). The outer side of the plate (9) and the inner wall of the guide wedge (10) are in contact with each other.

5. A multi-mode controlled deep well geostress monitoring probe according to claim 2, characterized in that, The base (1) has a top plate (19) inside, and a magnetic component one (20) is provided at the bottom of the top plate (19). A magnetic component two (21) is provided at the bottom of the magnetic component one (20). A locking block (14) is provided on the outside of the magnetic component two (21). The locking block (14) is slidably connected to the inside of the base (1).

6. A multi-mode controlled deep well geostress monitoring probe according to claim 5, characterized in that, The motor base (4) has a snap-fit ​​groove (22) at the top. The snap-fit ​​groove (22) is composed of an annular groove, a radial limiting protrusion and a positioning hole. The bottom of the snap-fit ​​block (14) has the same shape as the positioning hole, which is a triangle. The radial limiting protrusion is used to block the snap-fit ​​block (14).

7. A multi-mode controlled deep well geostress monitoring probe according to claim 1, characterized in that, The shrinkage distance between the clamping structure (3) and the axis of the base (1) is less than the distance between the maximum outer diameter of the base (1) and the axis, and the stretching distance between the clamping structure (3) and the axis of the base (1) is greater than the distance between the maximum outer diameter of the base (1) and the axis.

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