A scanning electron microscope leveling sample stage and sample leveling method for geologically irregular rock mass

Abstract

The application discloses a scanning electron microscope leveling sample stage for geological irregular rock blocks and a sample leveling method, relates to the technical field of geological sample detection, and aims to solve the problem of uneven height of multiple rock block samples fixed on the existing sample stage and the problem of easy collision with the probe. The scanning electron microscope leveling sample stage comprises a base, an operating mechanism, multiple mounting seats and multiple lifting leveling mechanisms, and the operating mechanism is coupled with the multiple lifting leveling mechanisms; the operating mechanism can control the multiple lifting leveling mechanisms to simultaneously drive the multiple mounting seats to lift, so that the heights of the highest points of the rock block samples on each mounting seat are consistent. The application can make the highest points of all irregular rock block sample surfaces on the sample stage be at the same height, and during the detection process, when the samples are switched, the sample stage does not need to be repeatedly lifted, so that the detection efficiency is improved, and the risk of collision with the probe is avoided.

Description

Technical Field

[0001] This invention belongs to the field of geological sample testing technology, and specifically relates to a scanning electron microscope leveling sample stage and sample leveling method for irregular geological rock blocks. Background Technology

[0002] In the standardized testing process for geological samples, the first step is to break up the rock cores or blocky rocks collected in the field using specialized tools to obtain multiple irregular rock samples of varying sizes for testing. These samples are then carefully fixed onto a dedicated sample stage and undergo uniform carbon spraying to enhance their conductivity. After these steps, the samples are sent into the sample chamber of a scanning electron microscope (SEM), where high-precision electron beam scanning and imaging techniques are used to perform comprehensive and detailed analysis.

[0003] Currently, conventional scanning electron microscope (SEM) stages are mostly one-piece fixed planar structures. When examining batches of irregular rock samples, multiple samples are directly adhered to the stage surface using conductive adhesive. Because geological rocks are irregularly shaped after being broken, there are significant height differences between the highest points of different samples after batch adhesion. However, the backscattered electron microscope (SEM) probe and energy dispersive spectroscopy (EDS) probe have fixed optimal working distances. During the examination, the stage must be frequently raised and lowered to match this working distance based on the sample height. Furthermore, when switching from low-height samples to high-height samples, if the operator does not adjust the stage height in time, the high sample may bump into the probe, causing damage to the core components of the SEM. Summary of the Invention

[0004] In view of the above analysis, the present invention aims to provide a scanning electron microscope leveling sample stage and sample leveling method for geologically irregular rock blocks, so as to solve one or more of the above-mentioned problems in the prior art.

[0005] The objective of this invention is achieved as follows:

[0006] In a first aspect, a scanning electron microscope (SEM) leveling stage for irregularly shaped geological rock blocks is provided, comprising:

[0007] The base has a receiving cavity;

[0008] The operating mechanism is inserted into the side of the base, with one part of the operating mechanism located outside the base and the other part located in the receiving cavity;

[0009] Multiple lifting and leveling mechanisms are installed in the receiving cavity, and part of the structure extends above the base. The operating mechanism is coupled with the multiple lifting and leveling mechanisms.

[0010] Multiple mounting bases are respectively set on the top of the base, and the number of mounting bases is one more than the number of lifting and leveling mechanisms; the first mounting base is connected to the base, and the remaining mounting bases are each driven and connected to a lifting and leveling mechanism.

[0011] The operating mechanism can control multiple lifting and leveling mechanisms to simultaneously drive the lifting and lowering of multiple corresponding mounting seats. The height limit component controls the rising height of multiple mounting seats, so that the highest point of the rock sample on all mounting seats is at the same height.

[0012] Furthermore, the lifting and leveling mechanism includes a vertical slide bar and a rack and pinion assembly, and the operating mechanism drives the vertical slide bar to lift and lower via the rack and pinion assembly.

[0013] Furthermore, the rack and pinion assembly includes a horizontal rack, a gear set, and a vertical rack. The horizontal rack meshes with the gear set, the vertical rack is vertically positioned and meshes with the gear set, a vertical slide rod is inserted into the vertical rack, and the vertical slide rod can move up and down relative to the vertical rack. The operating mechanism is connected to the horizontal rack.

[0014] Furthermore, the operating mechanism is capable of moving in the horizontal direction.

[0015] Furthermore, the top of the vertical rack is provided with a receiving hole, and the vertical slide rod is inserted into the receiving hole. The vertical slide rod and the vertical rack are connected by an interference fit.

[0016] Furthermore, it also includes a locking mechanism for locking or releasing the vertical slide bar.

[0017] Furthermore, the locking mechanism includes a locking knob and a rotating rod. The rotating rod is threaded onto the base and passes through a vertical rack. The locking knob is connected to the rotating rod and is located outside the base. The rotating rod can move and abut against the vertical slide bar.

[0018] Furthermore, the locking mechanism includes a first circular box, a torsion spring structure, a pull wire, a sleeve, a snap-fit ​​component, a bottom spring, and a clamping plate. The torsion spring structure is disposed in the first circular box. One end of the pull wire is connected to and wound around the torsion spring structure. The pull wire is pulled vertically out from the wire outlet hole on the first circular box. The clamping plate is disposed on the side of the wire outlet hole. The sleeve is installed in the fixing hole on the side of the vertical rack near the top. The bottom of the sleeve is connected to the bottom spring. The snap-fit ​​component abuts against the side of the vertical slide rod and is connected to the bottom spring. The other end of the pull wire passes through the wire opening at the bottom of the sleeve and is connected to the end of the snap-fit ​​component. When the first circular box rotates, the clamping plate can abut against the pull wire.

[0019] Furthermore, the horizontal rack is rotatably connected to the operating mechanism, and both ends of the horizontal rack are limited, while the first circular box is fixedly connected to the operating mechanism.

[0020] Furthermore, the operating mechanism includes an operating knob, an operating shaft, and a limiting plate. The operating knob is connected to the operating shaft, which passes through the base into the receiving cavity. The operating knob is located outside the base. A horizontal rack is inserted into the operating shaft and is rotatably connected to the operating shaft. The limiting plate is set on the operating shaft and located at both ends of the horizontal rack. Limiting clamps are provided on opposite sides of the horizontal rack. The first circular box is fixedly connected to the operating shaft.

[0021] Furthermore, the height limiting component includes a fixed base, a vertical support rod, and a horizontal bar. The vertical support rod is connected to the fixed base, and the horizontal bar is connected to the vertical support rod, extending laterally above multiple mounting bases.

[0022] Furthermore, the height limiting component also includes a sliding block and a scale. The sliding block is slidably connected to the crossbar, and there are multiple sliding blocks. The scale is connected to the sliding block and can move up and down.

[0023] Secondly, a sample leveling method for irregularly shaped geological rock blocks is also provided. The above-mentioned scanning electron microscope sample leveling stage for irregularly shaped geological rock blocks is used, and the height of the highest point of the rock block sample on all mounting seats is made consistent by using the lifting and leveling mechanism and the height limiting component.

[0024] Furthermore, the method for leveling samples of geologically irregular rock blocks includes the following steps:

[0025] The maximum height of all irregular geological rock samples to be tested was measured in advance, and the rock sample with the highest height was selected as the unified height reference sample for this batch of sample leveling.

[0026] The selected reference rock sample is bonded and fixed to the top surface of the first mounting seat on the base with no vertical movement using conductive carbon adhesive for scanning electron microscope. The highest point of the surface of the reference rock sample is used as the uniform reference height for leveling all samples.

[0027] Based on the predicted height of the remaining irregular rock samples, calculate the required lifting compensation for the corresponding liftable mounting base.

[0028] Using the height of the reference rock block on the first mounting base as the limiting standard, and combining the predetermined movement height of each mounting base, the height of the height limiting component is preset;

[0029] The height restriction components, once set up, are then steadily installed directly above all the mounting bases.

[0030] The operating mechanism exposed on the side of the operating base is connected to multiple lifting and leveling mechanisms inside the base cavity through the coupling of the operating mechanism, so that the action is synchronously transmitted to all lifting and leveling mechanisms.

[0031] Multiple lifting and leveling mechanisms synchronously drive the liftable mounting bases connected to them one by one, so that they can rise synchronously.

[0032] When a height-adjustable mounting base rises to the corresponding preset height, the height-limiting component will prevent the mounting base from rising further.

[0033] The remaining mounting seats that are not in place continue to rise synchronously with the lifting and leveling mechanism until all the liftable mounting seats contact the height limiting components and are restricted from moving, thus completing the height leveling of all mounting seats.

[0034] The remaining irregular rock samples to be tested were then sequentially bonded and fixed onto the top surface of the corresponding leveled, liftable mounting base, so that the highest point of all the rock samples on the mounting bases was at the same height.

[0035] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0036] a) The scanning electron microscope leveling sample stage for irregular geological rock blocks provided by the present invention can adjust the highest point of the surface of all rock block samples to the same height by setting a lifting and leveling mechanism and a mounting base on the base of the sample stage. When switching samples during the detection process, there is no need to frequently lift and lower the sample stage to adjust the working distance, saving detection time, improving detection efficiency, and avoiding the risk of probe collision.

[0037] b) The scanning electron microscope leveling sample stage for irregular geological rock blocks provided by the present invention has an operating mechanism coupled with multiple lifting and leveling mechanisms in the base cavity. All lifting and leveling mechanisms can be adjusted simultaneously through the operating mechanism exposed on the side of the base, and each mounting seat connected to it can be driven to lift and lower synchronously. Multiple sample top surfaces can be adjusted and leveled at one time, which is convenient and quick.

[0038] c) The sample leveling method for irregularly shaped geological blocks provided by this invention, through the logic of first leveling the mounting base and then attaching the sample, ensures that the top surface of the rock block sample is not contacted during the entire leveling process. This avoids damage to the fragile fracture surface and microstructure of the rock block by lifting, lowering, or limiting movements, thus ensuring the authenticity and accuracy of the data from scanning electron microscopy morphology observation and energy dispersive spectroscopy (EDS) composition analysis. Furthermore, the highest point of all rock block samples is uniformly at the same reference height, eliminating the need for repeated lifting and lowering of the sample stage when switching samples during the testing process. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0040] Figure 1A schematic diagram of the overall structure of the scanning electron microscope leveling sample stage for irregular geological rock blocks provided by the present invention. Figure 1 ;

[0041] Figure 2 A schematic diagram of the overall structure of the scanning electron microscope leveling sample stage for irregular geological rock blocks provided by the present invention. Figure 2 ;

[0042] Figure 3 This is a schematic diagram of the structure of the operating mechanism and the lifting and leveling mechanism provided by the present invention;

[0043] Figure 4 This is a schematic diagram of the lifting and leveling mechanism provided by the present invention;

[0044] Figure 5 for Figure 4 A magnified schematic diagram of the structure of part A in the diagram;

[0045] Figure 6 A schematic diagram of one type of locking structure provided by the present invention;

[0046] Figure 7 This is a schematic diagram of the clamping plate structure provided by the present invention.

[0047] Figure label:

[0048] 10. Base; 101. Top cover;

[0049] 20. Operating mechanism; 201. Operating knob; 202. Operating shaft; 203. Limiting plate; 204. Limiting clamp;

[0050] 30. Mounting bracket;

[0051] 40. Height limiting component; 401. Fixing base; 402. Vertical support rod; 403. Horizontal bar; 404. Sliding block; 405. Scale;

[0052] 50. Horizontal rack; 51. Gear set; 52. Vertical rack; 53. Vertical slide bar;

[0053] 61. Locking knob; 62. Rotating rod; 63. First round box; 64. Pull wire; 65. Sleeve; 66. Snap-fit ​​component; 67. Bottom spring; 68. Clamping plate. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] To facilitate understanding of the embodiments of this application, further explanation and description will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this application. In the drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0056] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0057] Example 1

[0058] A specific embodiment of the present invention, such as Figures 1 to 7As shown, this embodiment provides a scanning electron microscope (SEM) leveling sample stage for irregularly shaped geological rock blocks, including a base 10, an operating mechanism 20, multiple lifting and leveling mechanisms, and multiple mounting seats 30. The base 10 has a receiving cavity; the operating mechanism 20 is inserted into the side of the base 10, with a portion of the operating mechanism 20 located outside the base 10 and another portion located within the receiving cavity; multiple lifting and leveling mechanisms are disposed within the receiving cavity, with some structures extending above the base 10, and the operating mechanism 20 is coupled to the multiple lifting and leveling mechanisms; multiple mounting seats 30 are respectively disposed above the base 10, with the first mounting seat 30 connected to the base 10, and each of the remaining mounting seats 30 being driven and connected to a lifting and leveling mechanism; the operating mechanism 20 can control the multiple lifting and leveling mechanisms to simultaneously drive the multiple corresponding mounting seats 30 to rise and fall, and the height of the multiple lifting and leveling mounting seats 30 is controlled by a height limiting component 40, ensuring that the highest point of the rock block sample on all mounting seats 30 is at the same height.

[0059] In this embodiment, the number of mounting seats 30 is one more than the number of lifting and leveling mechanisms. That is, one mounting seat 30 serves as a fixed reference seat, and its position remains stationary; the remaining mounting seats 30 serve as lifting and leveling seats, and can be raised and lowered under the drive of the lifting and leveling mechanisms. The height limiting component 40 has a lateral limiting part, which is configured to ensure that the highest point of the rock sample on all lifting and leveling seats is at the same height as the highest point of the rock sample on the fixed reference seat.

[0060] In this embodiment, multiple mounting seats 30 refers to at least three mounting seats 30. For example, in this embodiment, three mounting seats 30 are provided, wherein the first mounting seat 30 does not have a lifting function, and the other two mounting seats 30 have a lifting function.

[0061] In this embodiment, the height of multiple irregular geological rock samples to be tested is measured in advance, and the rock sample with the highest height is selected as the uniform height reference sample. This reference rock sample is adhered to the first mounting seat 30 on the base 10 with no vertical movement, and the highest point of the surface of the rock sample on the first mounting seat 30 is used as the uniform reference height for leveling the batch of samples. Based on the measured height of the remaining irregular rock samples, the required vertical compensation amount for the corresponding mounting seat 30 is calculated. The operator operates the base 10 via an exposed operating mechanism 20 on its side. Since the operating mechanism 20 is coupled to multiple lifting and leveling mechanisms within the base 10's cavity, the movement of the operating mechanism 20 is synchronously transmitted to all lifting and leveling mechanisms. These mechanisms then simultaneously drive the corresponding mounting seats 30 to lift and lower. A height-limiting component 40, using the reference height of the rock sample on the first mounting seat 30 as a limit, determines the required height of the corresponding mounting seat 30 based on pre-measured heights of other rock samples. The height-limiting component 40 is then set based on the predetermined movement height of the mounting seat 30 and placed above the mounting seats 30. Once the lifting and leveling mechanism drives the corresponding mounting seat 30 to its designated position, the height-limiting component 40 prevents it from rising further. The remaining mounting seats 30 continue to move until they contact the height-limiting component 40, at which point their movement is restricted. After the mounting base 30 is moved, the corresponding rock sample is pasted and fixed, so that the highest point of all rock samples on the mounting base 30 is completely consistent, eliminating the surface height difference between batch samples.

[0062] In this embodiment, the highest point of all rock sample surfaces is at the same reference height. When switching samples during the testing process, there is no need to repeatedly raise and lower the sample stage, which not only improves testing efficiency but also avoids the risk of probe collision. In addition, this embodiment uses a linkage structure that couples a single operating mechanism 20 with all lifting and leveling mechanisms. Only a single operation of the operating mechanism 20 is needed to synchronously drive all movable mounting seats 30 to rise and fall synchronously. With the help of the pre-set height limiting component 40, the system stops as soon as it reaches the correct position, eliminating the need for operators to manually adjust and repeatedly calibrate each mounting seat 30 individually. In this embodiment, the leveling operation of the mounting seats 30 is completed before the rock sample is attached. During the entire leveling process, no rock sample is attached to the mounting seat 30, avoiding damage or scratches to the fragile cross-section and microstructure of the rock sample caused by the lifting and lowering movements and limiting contact. This preserves the original testing state of the geological rock sample and eliminates the interference of sample damage on the observation of the microstructure of the scanning electron microscope and the results of energy dispersive spectroscopy, ensuring the authenticity and accuracy of the test data. When the rock sample is pasted, all mounting bases 30 are already leveled and in a stationary state. After pasting, no further leveling or lifting operation is required, thus avoiding disturbance to the bonding surface of the rock sample.

[0063] Since motors, sensors, and magnets can affect the normal use of electron microscope equipment, in this embodiment, the operating mechanism 20 and multiple lifting and leveling mechanisms are implemented using a simple mechanical structure, without using motors, sensors, magnets, or other related structures.

[0064] In some alternative embodiments, the lifting and leveling mechanism includes a vertical slide bar 53 and a rack and pinion assembly. The operating mechanism 20 drives the vertical slide bar 53 to rise and fall via the rack and pinion assembly. The top of the sample stage body 10 is provided with a top cover plate 101, which has a through hole. The vertical slide bar 53 passes through the through hole in the top cover plate 101, and the top end of the vertical slide bar 53 is connected to the bottom surface of the mounting base 30.

[0065] Optionally, the rack and pinion assembly includes a horizontal rack 50, a gear set 51, and a vertical rack 52. The horizontal rack 50 is meshed with the gear set 51, the vertical rack 52 is vertically arranged and meshes with the gear set 51, and a vertical slide rod 53 is inserted into the vertical rack 52. The vertical slide rod 53 can move up and down relative to the vertical rack 52. The operating mechanism 20 is simultaneously connected to the horizontal racks 50 of multiple lifting and leveling mechanisms, and the operating mechanism 20 can move in the horizontal direction.

[0066] The gear set 51 includes two coaxial gears. The gear set 51 uses an existing structure, with one gear having a larger diameter than the other. Together, they form a gear set structure. The smaller diameter gear connects to the horizontal rack 50, allowing the vertical rack 52 to move a distance several times greater than the initial distance after the horizontal rack 50 has moved a first distance. This enables the operating mechanism 20 to achieve the full-range lifting and lowering effect of the vertical rack 52 with only a small movement of the operating mechanism 20.

[0067] The tallest rock sample is selected and fixed on the first non-lifting mounting seat 30 of the base 10. The required lifting compensation for each of the remaining mounting seats 30 is calculated. Then, the height limiting component 40 is placed at the height limiting position above the base 10. The operating mechanism 20 is in its initial position, all horizontal racks 50 are coaxially fixed with the operating mechanism 20, the vertical rack 52 is at its lowest stroke position, the vertical slide bar 53 is in its initial state of extending most of the structure on the vertical rack 52, and the mounting seat 30 is in its lowest position, close to the top surface of the base 10. The operator pushes the operating mechanism 20 on the outside of the base 10 towards the base 10. The operating mechanism 20 drives all the horizontal racks 50 connected to it to make a horizontal linear displacement in the same direction and with the same stroke. The horizontal displacement of the horizontal racks 50 causes the vertical rack 52 to rise vertically through the speed-changing gear set 51. The vertical rack 52 drives the vertical slide bar 53 to move, and the vertical slide bar 53 drives the mounting seats 30 to rise synchronously, realizing the synchronous rise of all mounting seats 30. During the synchronous rising of the mounting bases 30, when a corresponding mounting base 30 rises to the predetermined target height, the mounting base 30 contacts the height limiting component 40 and triggers a limit switch, preventing the mounting base 30 from rising further; the remaining mounting bases 30 continue to rise synchronously until all mounting bases 30 are limited by the height limiting component 40 at their respective target heights, completing the batch height adjustment of the mounting bases 30. After the measurement is completed, simply pull the operating mechanism 20 outward from the base 10 to complete the reset. Due to the limit switch between the base 10 and the mounting bases 30, the vertical slide bar 53 automatically resets when the vertical rack 52 descends.

[0068] In some embodiments, the top of the vertical rack 52 is provided with a receiving hole, and the vertical slide rod 53 is inserted into the receiving hole. The vertical slide rod 53 and the vertical rack 52 are inserted together and slightly tight, so that the vertical rack 52 and the vertical slide rod 53 generate friction through the squeezing force of the contact surface. That is to say, there is a certain friction between the two, and there is a critical friction value between them that causes sliding. If the critical friction value is exceeded, the two slide relative to each other; if the friction value is less than the critical friction value, the two rise and fall together.

[0069] The vertical slide bar 53 is a rectangular strip structure. A predetermined force is required for the vertical slide bar 53 to move upwards or downwards to overcome the friction between the vertical slide bar 53 and the vertical rack 52. The predetermined force is set so that after the vertical slide bar 53 moves into position, it can support the rock sample and related structures without relative movement. After the vertical slide bar 53 abuts against the height limiting component 40, if the vertical rack 52 continues to move, the vertical slide bar 53 can descend relative to the vertical rack 52, and the vertical slide bar 53 retracts into the vertical rack 52.

[0070] In some other embodiments, the sliding clamping structure between the vertical slide rod 53 and the vertical rack 52 can also be that at least one elastic mounting hole is opened in the side wall of the vertical rack 52, and an elastic clamping member is installed in the elastic mounting hole; one end of the elastic clamping member abuts against the outer wall of the vertical slide rod 53, and the vertical slide rod 53 is clamped and fixed by elastic force, so that the vertical slide rod 53 remains unchanged in position when there is no external force; under the action of external force, the vertical slide rod 53 can overcome the elastic clamping force and slide up and down relative to the vertical rack 52 to achieve height adjustment. The elastic clamping member can adopt a structure in which a spring and a ball head are connected, with the spring installed in the elastic mounting hole and the ball head abutting against the vertical slide rod 53.

[0071] In this embodiment, the height limiting component 40 includes a fixed base 401, a vertical support rod 402, a horizontal bar 403, a slide block 404, and a scale 405. The horizontal bar 403 is a lateral limiting part. The vertical support rod 402 is connected to the fixed base 401. The horizontal bar 403 is connected to the vertical support rod 402. The slide block 404 is slidably connected to the horizontal bar 403. Multiple slide blocks 404 are included. The scale 405 is connected to the slide block 404 and can move up and down.

[0072] The fixing base 401 is fixed by bolts or placed directly on the side of the base 10. The vertical support rod 402 is vertically fixed to the top of the fixing base 401, and the horizontal rod 403 is horizontally fixed to the upper end of the vertical support rod 402. The horizontal rod 403 is horizontally set, and the whole structure is erected directly above all the mounting bases 30. Multiple slides 404 are fitted on the horizontal rod 403 and can slide freely along the horizontal rod 403, with their number increasing or decreasing. Each slide 404 is equipped with a graduated scale 405, which can move freely up and down and lock along the vertical hole of the slide 404. The locking structure between the scale 405 and the slide 404 adopts an existing structure, such as bolts.

[0073] Using the highest point of the rock sample fixed on the first mounting base 30 as a uniform height, the target top surface height of the corresponding mounting base 30 is calculated based on the predicted heights of the remaining rock samples. The target top surface height is equal to the uniform reference height minus the height of the corresponding rock sample. The remaining slides 404 are slid one by one along the crossbar 403 to be directly above each mounting base 30 to be leveled. Using the calibrated reference scale 405 as a reference, the scale 405 on each slide 404 is moved downwards so that the lower end of the scale 405 is precisely stopped at the target top surface height of the corresponding mounting base 30. The position of each scale 405 is locked, completing the independent limit height preset of all mounting bases 30. The operator drives the lifting and leveling mechanism via the operating mechanism 20, causing all the mounting seats 30 to be leveled to rise synchronously. The top surface of the mounting seats 30 continues to rise until the top surface of a certain mounting seat 30 is in complete contact with the lower end surface of the corresponding scale 405. The rigid blocking force of the scale 405 restricts the mounting seat 30 from moving further upward, thus achieving the positioning limit of the mounting seat 30. The remaining mounting seats 30 continue to rise synchronously until their respective top surfaces are in complete contact with the lower end surface of the corresponding scale 405, and are successively limited and stopped. Finally, all mounting seats 30 are limited to their respective preset target heights. After adjustment, the entire height limiting component 40 can be removed.

[0074] In some embodiments, a locking mechanism is also included for locking or releasing the vertical slide bar 53. The locking mechanism includes two options:

[0075] The locking mechanism of the first embodiment includes a locking knob 61 and a rotating rod 62. The rotating rod 62 is threaded onto the base 10 and passes through the side wall of the base 10 into the receiving cavity. The locking knob 61 is connected to the rotating rod 62 and is located outside the base 10. The rotating rod 62 can move perpendicular to the vertical slide bar 53 and abut against the vertical slide bar 53.

[0076] After the vertical slide bar 53 is adjusted to the target height, the operator rotates the locking knob 61 on the outside of the base 10, causing the connected rotating rod 62 to rotate. The end of the rotating rod 62 moves towards the vertical slide bar 53 until it abuts against the side wall of the vertical slide bar 53, thus locking the vertical slide bar 53. When the locking knob 61 is rotated in the opposite direction, the rotating rod 62 moves axially backward, disengaging from the contact with the vertical slide bar 53, thus releasing the lock on the vertical slide bar 53. During setup, the vertical slide bar 53 is initially in its extended state, flush with the top surface of the base 10, so that the mounting base 30 is tightly attached to the base 10. The rotating rod 62 is positioned at the inner top of the base 10, ensuring that the rotating rod 62 always corresponds to the vertical slide bar 53 when it rises and falls. Preferably, the end of the rotating rod 62 is provided with an anti-slip layer, such as a rubber layer. The rubber layer has a concave arc-shaped surface that is adapted to the outer wall surface of the vertical slide rod 53. By providing the rubber anti-slip layer, the friction between the rotating rod 62 and the outer wall of the vertical slide rod 53 is increased.

[0077] The locking mechanism of the second scheme includes a first circular box 63, a torsion spring structure, a pull wire 64, a sleeve 65, a snap-fit ​​component 66, a bottom spring 67, and a clamping plate 68. The torsion spring structure is disposed in the first circular box 63. One end of the pull wire 64 is connected to the torsion spring structure and is wound around the torsion spring structure. The first circular box 63 has an upward-facing outlet hole. The pull wire 64 is pulled out vertically from the outlet hole. The pull wire 64 can be automatically retracted by the torsion spring structure. The clamping plate 68 is disposed on the first circular box 63. The clamping plate 68 is located to the side of the outlet hole of the first circular box 63 and is also located in the rotation direction of the first circular box 63. The clamping plate 68 is arranged vertically. A fixing hole is provided on the side of the vertical rack 52 near the top. A sleeve 65 is installed in the fixing hole. The sleeve 65 is an open cylindrical structure. A bottom spring 67 is connected to the bottom of the sleeve 65. A snap-fit ​​piece 66 is connected to the bottom spring 67. The snap-fit ​​piece 66 can extend and abut against the side wall of the vertical slide rod 53 under the elastic support of the bottom spring 67. A wire opening is provided at the bottom of the sleeve 65. The other end of the pull wire 64 passes through the wire opening and connects to the end of the snap-fit ​​piece 66. The first round box 63 can be rotated. When the first round box 63 rotates, the clamping piece 68 can abut against the pull wire 64 and hold the pull wire 64 above the wire outlet. After holding it, the first round box 63 continues to rotate, and the pull wire 64 can be pulled at the clamping point. A roller is provided above the wire outlet. The roller directly above is connected to the pull wire 64 in a turning direction. The roller directly above keeps the pull wire 64 in a vertically taut state.

[0078] In this embodiment, the pull cord 64 can be a combination of a strip structure and a linear structure. The strip structure is connected to the torsion spring structure, similar to the structure of a measuring tape. The linear structure is connected to the snap-fit ​​member 66 for easy connection.

[0079] The first round box 63 is fixed on the operating mechanism 20. The torsion spring structure is coaxially installed in the closed inner cavity of the first round box 63. One end of the strip structure of the pull wire 64 is fixed on the spindle of the torsion spring structure and tightly wound on the spindle. The other end of the pull wire 64 passes through the wire outlet hole at the top of the first round box 63 and passes through the wire opening at the bottom of the sleeve 65 to connect with the snap-fit ​​member 66.

[0080] With the first circular box 63 in a stationary state, the locking member 66 remains in contact with the vertical slide bar 53. When the operator rotates the first circular box 63, the strip structure of the pull cable 64 abuts against the clamping plate 68 of the first circular box 63. During this abutment, the relative sliding friction between the clamping plate 68 and the pull cable 64 is greater than the elastic force of the bottom spring 67. This allows the pull cable 64 to be pulled when the clamping plate 68 abuts against the pull cable 64, by rotating the first circular box 63. The pull cable 64 pulls the locking member 66 backward, simultaneously compressing the bottom spring 67, so that the front end of the locking member 66 no longer abuts against the vertical slide bar 53. At this point, the vertical slide bar 53 can be moved downward or upward, achieving the movement and reset of the vertical slide bar 53. When the vertical rack 52 moves upward, the operating mechanism 20 is rotated first, causing the first circular box 63 to rotate by a predetermined angle, such as 30 degrees, so that the clamping plate 68 abuts against the pull wire 64. The first circular box 63 is rotated further, causing the pull wire 64 to drive the locking piece 66 to retract, thereby unlocking the vertical slide bar 53 from the vertical rack 52. This pushes the operating mechanism 20 to move, causing the vertical rack 52 to move upward. At this time, the moving force of the vertical rack 52 can overcome the friction of the clamping plate 68 against the pull wire 64, causing the bottom spring 67 to be further compressed. At the same time, the pull wire 64 extends further. After reaching the position, the first circular box 63 is reset, and the clamping plate 68 and the pull wire 64 no longer abut against each other. The locking piece 66 abuts against the surface of the vertical slide bar 53 under the compression of the bottom spring 67, locking the vertical slide bar 53. After the measurement is completed, rotate the operating mechanism 20 to unlock the vertical slide bar 53, pull the vertical slide bar 53 upward to reset it, and then retract the operating mechanism 20 to lower and reset the vertical rack 52.

[0081] A positioning element is provided at the top of the inner wall of the vertical rack 52. After the bottom side of the vertical slide bar 53 comes into contact with the positioning element, it indicates that the vertical slide bar 53 is in the starting position.

[0082] The force generated by the snap-fit ​​member 66 against the vertical slide bar 53 makes it difficult for the vertical slide bar 53 to move, thus fixing it in place. Compared to the elastic clamping member of the sliding clamping structure, the vertical slide bar 53 can be moved by hand with a light pressure after being held against by the elastic clamping member. In other words, the snap-fit ​​member 66 is designed to fix the vertical slide bar 53, while the elastic clamping member is designed to allow the vertical slide bar 53 to move, but the movement requires a slight driving force.

[0083] The horizontal rack 50 is rotatably connected to the operating mechanism 20, and both ends of the horizontal rack 50 are limited. The first circular box 63 is fixedly connected to the operating mechanism 20.

[0084] In this embodiment, the vertical rack 52 and the horizontal rack 50, and their similar moving structures, use existing structures such as limiting guide rings to achieve smooth movement and fixation.

[0085] In some embodiments, the operating mechanism 20 includes an operating knob 201, an operating shaft 202, and a limiting plate 203. The operating knob 201 is connected to the operating shaft 202. The operating shaft 202 passes through the base 10 into the receiving cavity. The operating knob 201 is located outside the base 10. The horizontal rack 50 is inserted into the operating shaft 202 and is rotatably connected to the operating shaft 202. The limiting plate 203 is disposed on the operating shaft 202 and located at both ends of the horizontal rack 50. Limiting clamps 204 are provided on opposite sides of the horizontal rack 50. The first circular box 63 is fixedly connected to the operating shaft 202.

[0086] Each horizontal rack 50 is coaxially mounted on the operating shaft 202. A limiting piece 203 is coaxially fixed at both ends of each horizontal rack 50 on the operating shaft 202. A limiting clamp 204 is fixed to the side of each horizontal rack 50. The limiting clamp 204 is connected to the inner wall of the base 10. The limiting pieces 203 prevent the horizontal rack 50 from moving axially along the operating shaft 202, and the limiting clamps 204 prevent the horizontal rack 50 from rotating relative to the operating shaft 202. The first circular box 63 is coaxially fixedly mounted on the operating shaft 202 and can rotate synchronously with the operating shaft 202.

[0087] The operator holds the operating knob 201 and pushes or pulls it horizontally along the axial direction, causing the operating shaft 202 to move horizontally in a linear motion. This causes the horizontal rack 50 to move horizontally in a linear motion synchronously along the axial direction of the operating shaft 202. The teeth of the horizontal rack 50 drive the transmission gear set 51 to rotate, which in turn drives the vertical rack 52, the vertical slide rod 53, and the mounting base 30 to move vertically up and down. After the vertical slide rod 53 moves into position, the locking mechanism locks, completing the synchronous adjustment of the rock sample.

[0088] When the vertical rack 52 rises, the two vertical racks 52 rise synchronously. After one of the mounting seats 30 is in place, the two vertical racks 52 will still rise synchronously. The difference is that the vertical slide bar 53 connected below the in place mounting seat 30 will descend relative to the vertical rack 52, thereby maintaining the overall height unchanged.

[0089] The pull cable 64 is deflected by multiple rollers; this type of structure can be achieved using existing structures.

[0090] When resetting the vertical slide bar 53, the operator holds the operating knob 201 and rotates it, causing the operating shaft 202 to rotate synchronously. The operating shaft 202 drives the first circular box 63, which is fixedly connected to it, to rotate synchronously. The pull cable 64 controls all the locking parts 66 to disengage from the vertical slide bar 53. Then, the vertical slide bar 53 is pulled upward, and the operating shaft 202 is rotated to reset. Finally, the operating shaft 202 is moved horizontally to reset.

[0091] This application also provides a sample leveling method for irregular geological rock blocks, which involves pre-measuring the maximum height of all irregular geological rock block samples to be tested, and selecting the rock block sample with the highest height as the unified height reference sample for this batch of sample leveling.

[0092] The selected reference rock sample is bonded and fixed to the top surface of the first mounting seat 30 on the base 10 with no vertical movement using conductive carbon adhesive for scanning electron microscopy. The highest point of the surface of the reference rock sample is used as the uniform reference height for leveling all samples.

[0093] Based on the predicted height of the remaining irregular rock samples, calculate the required lifting compensation for the corresponding liftable mounting base 30.

[0094] Using the height of the reference rock block on the first mounting base 30 as the limiting standard, and in conjunction with the predetermined moving height of each mounting base 30, the height of the height limiting component 40 is preset.

[0095] The height limiting component 40, once set up, is then steadily installed directly above all the mounting bases 30.

[0096] The operating mechanism 20 exposed on the side of the operating base 10 is coupled to multiple lifting and leveling mechanisms inside the cavity of the base 10, and the action is synchronously transmitted to all lifting and leveling mechanisms.

[0097] Multiple lifting and leveling mechanisms synchronously drive the liftable mounting bases 30, which are connected to each other, to perform synchronous lifting actions.

[0098] When a certain height-adjustable mounting base 30 rises to the corresponding preset height, the height limiting component 40 will prevent the mounting base 30 from rising further;

[0099] The remaining mounting seats 30 that are not yet in place continue to rise synchronously with the lifting and leveling mechanism until all the liftable mounting seats 30 contact the height limiting component 40 and are restricted from moving, thus completing the height leveling of all mounting seats.

[0100] The remaining irregular rock samples to be tested are then sequentially bonded and fixed onto the top surface of the corresponding leveled and adjustable mounting base 30, so that the highest point of all rock samples on the mounting base 30 is completely consistent, eliminating the surface height difference between batch samples, and then they can be sent into a scanning electron microscope for detection.

[0101] The sample leveling method in this embodiment adopts the logic of first leveling the mounting base 30 and then attaching the sample. The entire leveling process will not contact the top surface of the rock sample, avoiding damage to the fragile cross-section and microstructure of the rock by lifting, lowering, or limiting actions, thus ensuring the authenticity and accuracy of the data from scanning electron microscopy morphology observation and energy dispersive spectroscopy composition analysis. The highest point of all rock samples is uniformly at the same reference height. When switching samples during the detection process, there is no need to repeatedly raise and lower the sample stage and refocus. Multiple samples can be continuously detected in a single loading.

[0102] The sample leveling method in this embodiment uses a single operating mechanism 20 to synchronously drive all height-adjustable mounting seats 30, and with the help of a preset height-limiting component 40, it can stop as soon as it is in place. This eliminates the need for operators to manually adjust and repeatedly calibrate each mounting seat 30, greatly reducing the operational threshold.

[0103] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A scanning electron microscope leveling sample stage for irregularly shaped geological rock blocks, characterized in that, include: The base has a receiving cavity; An operating mechanism is inserted into the side of the base, with a portion of the operating mechanism located outside the base and another portion located in the receiving cavity; Multiple lifting and leveling mechanisms are disposed in the receiving cavity, and part of the structure extends above the base. The operating mechanism is coupled to the multiple lifting and leveling mechanisms. Multiple mounting seats are respectively disposed above the base, and the number of mounting seats is one more than the number of lifting and leveling mechanisms; the first mounting seat is connected to the base, and the remaining mounting seats are each driven to one of the lifting and leveling mechanisms. The operating mechanism can control multiple lifting and leveling mechanisms to simultaneously drive multiple corresponding mounting seats to rise and fall, and control the rising height of multiple mounting seats through a height limiting component, so that the height of the highest point of the rock sample on all mounting seats is consistent.

2. The scanning electron microscope leveling sample stage for irregularly shaped geological rock blocks according to claim 1, characterized in that, The lifting and leveling mechanism includes a vertical slide bar and a rack and pinion assembly. The operating mechanism drives the vertical slide bar to lift and lower via the rack and pinion assembly.

3. The scanning electron microscope leveling sample stage for irregularly shaped geological rock blocks according to claim 2, characterized in that, The rack and pinion assembly includes a horizontal rack, a variable speed gear set, and a vertical rack. The horizontal rack is meshed with the variable speed gear set. The vertical rack is vertically arranged and meshes with the variable speed gear set. A vertical slide rod is inserted into the vertical rack and can move up and down relative to the vertical rack. The operating mechanism is connected to the horizontal rack.

4. The scanning electron microscope leveling sample stage for irregularly shaped geological rock blocks according to claim 3, characterized in that, The vertical rack has a receiving hole at its top, and the vertical slide rod is inserted into the receiving hole. The vertical slide rod and the vertical rack are connected by an interference fit.

5. The scanning electron microscope leveling sample stage for irregularly shaped geological rock blocks according to claim 3, characterized in that, It also includes a locking mechanism for locking or releasing the vertical slide bar.

6. The scanning electron microscope leveling sample stage for irregularly shaped geological rock blocks according to claim 5, characterized in that, The locking mechanism includes a locking knob and a rotating rod. The rotating rod is threaded onto the base and passes through the vertical rack. The locking knob is connected to the rotating rod and is located outside the base. The rotating rod is movable and abuts against the vertical slide bar.

7. The scanning electron microscope leveling sample stage for irregularly shaped geological rock blocks according to claim 5, characterized in that, The locking mechanism includes a first circular box, a torsion spring structure, a pull wire, a sleeve, a snap-fit ​​component, a bottom spring, and a clamping plate. The torsion spring structure is disposed in the first circular box. One end of the pull wire is connected to and wound around the torsion spring structure. The pull wire is pulled vertically out from the wire outlet hole on the first circular box. The clamping plate is disposed on the side of the wire outlet hole. The sleeve is installed in the fixing hole near the top side of the vertical rack. The bottom of the sleeve is connected to the bottom spring. The snap-fit ​​component abuts against the side of the vertical slide rod and is connected to the bottom spring. The other end of the pull wire passes through the wire opening at the bottom of the sleeve and is connected to the end of the snap-fit ​​component. When the first circular box rotates, the clamping plate can abut against the pull wire.

8. The scanning electron microscope leveling sample stage for irregularly shaped geological rock blocks according to claim 7, characterized in that, The operating mechanism includes an operating knob, an operating shaft, and a limiting plate. The operating knob is connected to the operating shaft, which passes through the base into the receiving cavity. The operating knob is located outside the base. A horizontal rack is inserted into the operating shaft and is rotatably connected to it. The limiting plate is disposed on the operating shaft and located at both ends of the horizontal rack. Limiting clamps are provided on opposite sides of the horizontal rack. The first circular box is fixedly connected to the operating shaft.

9. A method for leveling samples of geologically irregular rock blocks, characterized in that, Using the scanning electron microscope leveling sample stage for irregular geological rock blocks as described in any one of claims 1-8, the height of the highest point of all rock block samples on the mounting bases is made consistent by utilizing the lifting and leveling mechanism and the height limiting component.

10. The sample leveling method for irregularly shaped rock blocks according to claim 9, characterized in that, Includes the following steps: The maximum height of all irregular geological rock samples to be tested was measured in advance, and the rock sample with the highest height was selected as the unified height benchmark for this batch of sample leveling. The selected reference rock sample is bonded and fixed to the top surface of the first mounting seat on the base with no lifting or lowering movement using a special conductive carbon adhesive for scanning electron microscopes. The highest point of the surface of the reference rock sample is used as the uniform reference height for leveling all samples. Based on the predicted height of the remaining irregular rock samples, calculate the required lifting compensation for the corresponding liftable mounting base. Using the height of the reference rock block on the first mounting base as the limiting standard, and combining the predetermined movement height of each mounting base, the height of the height limiting component is preset; The height restriction components are then smoothly installed directly above all the mounting bases. The operating mechanism exposed on the side of the operating base is connected to multiple lifting and leveling mechanisms inside the base cavity through the coupling of the operating mechanism, so that the action is synchronously transmitted to all lifting and leveling mechanisms. Multiple lifting and leveling mechanisms synchronously drive the liftable mounting bases connected to them one by one to rise synchronously. When a height-adjustable mounting base rises to the corresponding preset height, the height-limiting component will prevent the mounting base from rising further. The remaining mounting seats that are not in place continue to rise synchronously with the lifting and leveling mechanism until all the liftable mounting seats contact the height limiting components and are restricted from moving, thus completing the height leveling of all mounting seats. The remaining irregular rock samples to be tested were sequentially bonded and fixed onto the top surface of the corresponding leveled and adjustable mounting base, so that the highest point of all rock samples on the mounting base was consistent.

Images