Anti-interference micro-displacement measuring instrument

Abstract

The utility model provides a kind of anti-interference micro-displacement measuring instrument, belong to measuring instrument technical field, it solves the technical problems such as the big outside environment interference that traditional measuring instrument often faces, and measurement precision is insufficient etc. Including shell, bottom plate, displacement component, electronic reading microscope and control processor, the lower end four corners of bottom plate are all fixed with shock absorbing leg, displacement component is located electronic reading microscope rear, control processor is fixed on the upper end of bottom plate, and located inside shell, slidingly equipped with moving door on shell side wall, the position of displacement component and electronic reading microscope all with moving door correspond, electronic reading microscope and control processor electrically connected, control processor and peripheral display screen electrically connected. The utility model is through multiple anti-interference design to ensure that measurement environment is stable, and structure is reasonable compact and easy to operate, low in cost, can effectively solve the deficiency of traditional instrument, provide reliable micro-displacement measuring means for teaching experiment and engineering measurement.

Description

Technical Field

[0001] This utility model belongs to the field of measuring instrument technology and relates to an anti-interference micro-displacement measuring instrument. Background Technology

[0002] In the field of micro-displacement measurement, traditional measuring instruments often face problems such as significant external environmental interference and insufficient measurement accuracy. External vibrations can easily cause the measurement reference to shift, affecting data stability; stray light in the environment can interfere with the optical observation system, reduce fringe contrast, and lead to counting errors; dust and other contaminants adhere to precision components, which not only affects the lifespan of the equipment but also exacerbates measurement deviations. At the same time, most existing equipment has a complex structure, is cumbersome to operate, and the adjustment process is time-consuming. Furthermore, some high-precision instruments are expensive, making it difficult to popularize them in teaching experiments and small-to-medium-sized engineering measurements.

[0003] Therefore, we propose an anti-interference micro-displacement measuring instrument. Through multiple anti-interference designs, it ensures a stable measurement environment. It has a reasonable and compact structure, is easy to operate, and is inexpensive. It can effectively solve the shortcomings of traditional instruments and provide a reliable means of micro-displacement measurement for teaching experiments and engineering measurements. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an anti-interference micro-displacement measuring instrument. The technical problem this invention aims to solve is: how to ensure a stable measurement environment through multiple anti-interference designs, achieve a reasonable and compact structure, be easy to operate, and be low in cost, effectively overcome the shortcomings of traditional instruments, and provide a reliable means of micro-displacement measurement for teaching experiments and engineering measurements.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An anti-interference micro-displacement measuring instrument includes a housing, a base plate, a displacement component, an electronic reading microscope, and a control processor. The housing is fixed to the upper end of the base plate, and shock-absorbing feet are fixed to the four corners of the lower end of the base plate. The displacement component and the electronic reading microscope are both located on the upper end of the base plate and inside the housing. The displacement component is located behind the electronic reading microscope. The control processor is fixed to the upper end of the base plate and inside the housing. A sliding door is provided on the side wall of the housing. The positions of the displacement component and the electronic reading microscope correspond to the sliding door. The electronic reading microscope is electrically connected to the control processor, and the control processor is electrically connected to the display screen of an external device.

[0007] The working principle of this invention is as follows: During measurement, two glass plates forming a fixed angle are placed on the displacement component, with an air wedge formed between the two glass plates. When the sodium lamp light source is turned on, the sodium lamp light source and the air wedge form clear interference fringes of equal thickness, which are observed by the electron reading microscope. The image is transmitted to the display screen via the control processor. The displacement component is manually controlled to produce a small displacement, which causes a small displacement between the two glass plates. The interference fringes of equal thickness move in a certain direction. The number of movements of the interference fringes of equal thickness is counted by the display screen and the electron reading microscope, and the value of the small displacement can be calculated through physical principles. The entire instrument is protected by a shell for dustproofing and light shielding. The bottom of the shell is supported by a base plate, and the shock-absorbing feet at the four corners of the bottom of the base plate reduce external vibration interference. A sliding door is provided on the side wall of the shell for easy operation and maintenance of the internal displacement component and electron reading microscope.

[0008] The displacement component includes a mounting frame, which is set on the upper part of the base plate. A vertical lead screw is rotatably mounted on the mounting frame. The upper end of the lead screw passes through the mounting frame and is fixed with a rocker arm. A moving block is slidably mounted on the mounting frame in the vertical direction. The lead screw and the moving block are connected in a transmission manner. A lower parallel platform is fixed on one side of the lower end of the mounting frame, and an upper parallel platform is fixed on one side of the moving block. The position and specifications of the upper parallel platform correspond to those of the lower parallel platform.

[0009] With the above structure, when a small displacement is required, rotating the rocker arm drives the lead screw to rotate on the mounting frame. Since the lead screw is connected to the moving block and the moving block slides vertically along the mounting frame, the rotational motion of the lead screw is converted into the vertical linear motion of the moving block. This, in turn, drives the upper parallel platform fixed on one end face of the moving block to move vertically in sync, creating a relative displacement between it and the lower parallel platform fixed on one end face of the mounting frame. This fixes the two glass plates onto the upper and lower parallel platforms respectively, forming an air wedge. The upper and lower parallel platforms drive the two glass plates to undergo small displacements, thereby achieving the adjustment and output of small displacements and providing precise displacement changes.

[0010] The electronic reading microscope mainly consists of an adjustable support, a microscope body, an eyepiece, an objective lens, and a reflector. The adjustable support is located at the top of the base plate, the microscope body is fixed on the adjustable support, the eyepiece and objective lens are respectively located at the top and bottom of the microscope body, and the reflector is rotatably mounted on the adjustable support, with the reflector located below the objective lens.

[0011] With the above structure, the adjustable support provides support for the entire electron reading microscope and allows for adjustment of its overall position and angle to meet measurement needs. The microscope body, as the core structure, connects and fixes the eyepiece and objective lens. The objective lens is aligned with the interference fringes to perform initial magnification imaging of the target, which is then transmitted to the eyepiece through the internal optical system of the microscope body. The eyepiece further magnifies the image, making it easier for the observer to observe clearly, while simultaneously transmitting the image signal to the control processor. The reflector can be rotated to adjust its angle, vertically reflecting the light from the sodium lamp source onto the two glass plates. Adjusting the adjustable support makes the equal-thickness interference fringes clearly visible, facilitating accurate observation and counting.

[0012] A fan is fixed to the upper end of the base plate. The fan is located inside the outer casing. An air curtain outlet pipe is fixed to the upper end of the outer casing. The air inlet of the air curtain outlet pipe is connected to the air outlet of the fan. The air outlet of the air curtain outlet pipe faces downward and is located above the sliding door.

[0013] With the above structure, when the fan at the top of the base plate is working, it draws in and pressurizes the air inside the casing, and then discharges it through the air curtain outlet pipe connected to the air outlet of the fan. Since the air curtain outlet pipe is fixed at the top of the casing and the air outlet faces downward and is located above the sliding door, the discharged airflow will form a downward air curtain at the sliding door. This air curtain can effectively prevent external dust and impurities from entering the casing through the gap between the sliding door and the casing. At the same time, the precision core components such as the displacement component and the electronic reading microscope provide a clean working environment, reducing the impact of external pollutants on measurement accuracy, and also helping to enhance the dustproof effect of the casing.

[0014] The inner surface of the outer shell is provided with a matte coating, which is a solidified coating applied to the inner surface of the outer shell. The matte coating is made of black matte paint. An observation window is provided on the sliding door, and a transparent acrylic plate is fixed inside the observation window.

[0015] With the above structure, the black matte paint has a low reflectivity, which can effectively absorb stray light inside the shell, reduce the reflection and scattering of light on the inner wall of the shell, avoid the interference of excess light on the observation of equal thickness interference fringes by the electron reading microscope, ensure stable light and clear contrast in the observation area, thereby improving the accuracy of optical signals in the process of micro-displacement measurement, enhancing the anti-interference ability of the instrument, and the observation window facilitates the observation of the inside of the shell.

[0016] The mounting bracket is equipped with a sodium lamp fixing bracket that slides vertically.

[0017] With the above structure, the height of the sodium lamp mounted on the mounting bracket can be flexibly adjusted by sliding the sodium lamp mounting bracket up and down. This allows the sodium lamp light source to be aligned with the air wedge formed by two glass plates on the displacement component, ensuring that the sodium lamp light shines on the air wedge at a suitable angle under the reflection of the mirror. This results in clear and stable interference fringes of equal thickness, providing good optical conditions for observation with the electron reading microscope and ensuring the accuracy of minute displacement measurements.

[0018] A movable plate is slidably provided on the upper end of the base plate in the front-back direction. The displacement component and the electronic reading microscope are both fixed on the upper end of the movable plate, and a handle is fixed on the front end of the movable plate.

[0019] With the above structure, by holding the handle and pushing or pulling the moving plate, the displacement component and the electronic reading microscope fixed on the upper part of the moving plate can be moved synchronously in the front and back direction. This makes it easy to move the displacement component and the electronic reading microscope out of the housing as a whole when the moving door is opened, so that the glass slides and other components can be disassembled, adjusted or maintained. After the operation is completed, they can be pushed back into the working position inside the housing to ensure that the measurement work can be carried out normally, while maintaining the relative position of each component and not affecting the measurement accuracy.

[0020] Compared with existing technologies, this anti-interference micro-displacement measuring instrument has the following advantages:

[0021] 1. By setting up an outer shell, shock-absorbing feet, a fan, and an air curtain outlet pipe, the shock-absorbing feet effectively reduce external vibration interference; the black matte paint coating on the inner surface of the outer shell can absorb stray light and avoid the influence of light reflection on the observation; the air curtain formed by the fan and the air curtain outlet pipe can block dust from entering, and multiple protections ensure a stable measurement environment and improve anti-interference performance.

[0022] 2. By combining the displacement component with the electronic reading microscope, precise micro-displacements can be achieved with high accuracy; the electronic reading microscope can magnify the interference fringes of equal thickness, and in conjunction with the image transmitted by the control processor, it can accurately count the number of fringes that have moved, ensuring the accuracy of the measurement results.

[0023] 3. This instrument has a reasonable structural design, compact layout of each component, high measurement accuracy, simple operation, and low cost. It is suitable for teaching experiments and engineering measurement fields, and provides a new technical means for the accurate measurement of minute displacements. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0026] Figure 3This is a rear view schematic diagram of the electronic reading microscope and displacement component in this utility model.

[0027] Figure 4 This is a front view structural diagram of the displacement component in this utility model.

[0028] In the diagram: 1. Outer shell; 2. Base plate; 3. Shock-absorbing feet; 4. Sliding door; 5. Displacement assembly; 6. Electron reading microscope; 7. Control processor; 8. Mounting bracket; 9. Lead screw; 10. Rocker arm; 11. Moving block; 12. Upper parallel platform; 13. Lower parallel platform; 14. Adjustable support; 15. Microscope body; 16. Eyepiece; 17. Objective lens; 18. Mirror; 19. Fan; 20. Air curtain outlet pipe; 21. Observation window; 22. Sodium lamp holder; 23. Moving plate; 24. Handle. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] like Figures 1-4 As shown, this anti-interference micro-displacement measuring instrument includes a housing 1, a base plate 2, a displacement component 5, an electronic reading microscope 6, and a control processor 7. The housing 1 is fixed to the upper end of the base plate 2, and shock-absorbing feet 3 are fixed to the four corners of the lower end of the base plate 2. The displacement component 5 and the electronic reading microscope 6 are both located on the upper end of the base plate 2 and are located inside the housing 1. The displacement component 5 is located behind the electronic reading microscope 6. The control processor 7 is fixed to the upper end of the base plate 2 and is located inside the housing 1. A sliding door 4 is slidably provided on the side wall of the housing 1. The positions of the displacement component 5 and the electronic reading microscope 6 correspond to the sliding door 4. The electronic reading microscope 6 is electrically connected to the control processor 7, and the control processor 7 is electrically connected to the display screen of an external device.

[0031] In this embodiment, during measurement, two glass plates forming a fixed angle are placed on the displacement component 5, with an air wedge formed between the two glass plates. The sodium lamp light source is turned on, and the sodium lamp light source and the air wedge form clear equal-thickness interference fringes, which are observed by the electron reading microscope. The image is transmitted to the display screen via the control processor 7. The displacement component 5 is manually controlled to produce a small displacement, which causes a small displacement between the two glass plates. The equal-thickness interference fringes move in a certain direction. The number of movements of the equal-thickness interference fringes is counted by the display screen and the electron reading microscope 6, and the value of the small displacement can be calculated through physical principles. The entire instrument is protected, dustproofed, and light-shielded by the outer shell 1. The bottom of the outer shell 1 is supported by the base plate 2. The shock-absorbing feet 3 at the four corners of the lower end of the base plate 2 reduce external vibration interference. A movable door 4 is provided on the side wall of the outer shell 1 to facilitate the operation and maintenance of the internal displacement component 5 and the electron reading microscope 6.

[0032] The displacement component 5 includes a mounting frame 8, which is set on the upper end of the base plate 2. A vertical lead screw 9 is rotatably mounted on the mounting frame 8. The upper end of the lead screw 9 passes through the mounting frame 8 and is fixed with a rocker arm 10. A moving block 11 is slidably mounted on the mounting frame 8 in the vertical direction. The lead screw 9 and the moving block 11 are connected in a transmission manner. A lower parallel platform 13 is fixed on one side of the lower end of the mounting frame 8, and an upper parallel platform 12 is fixed on one side of the moving block 11. The position and specifications of the upper parallel platform 12 correspond to those of the lower parallel platform 13.

[0033] In this embodiment, when a small displacement is required, the rocker arm 10 is rotated to drive the lead screw 9 to rotate on the mounting frame 8. Since the lead screw 9 is connected to the moving block 11 and the moving block 11 slides vertically along the mounting frame 8, the rotational motion of the lead screw 9 is converted into the vertical linear motion of the moving block 11. This causes the upper parallel platform 12, which is fixed on one side of the moving block 11, to move vertically in sync, generating a relative displacement between it and the lower parallel platform 13, which is fixed on one side of the mounting frame 8. This fixes the two glass plates onto the upper parallel platform 12 and the lower parallel platform 13, respectively, forming an air wedge. The upper parallel platform 12 and the lower parallel platform 13 cause the two glass plates to undergo a small displacement, thereby realizing the adjustment and output of the small displacement and providing precise displacement changes.

[0034] The electronic reading microscope 6 mainly consists of an adjustable support 14, a microscope body 15, an eyepiece 16, an objective lens 17, and a mirror 18. The adjustable support 14 is set on the upper end of the base plate 2. The microscope body 15 is fixed on the adjustable support 14. The eyepiece 16 and the objective lens 17 are respectively set on the upper and lower ends of the microscope body 15. The mirror 18 is rotatably set on the adjustable support 14 and is located below the objective lens 17.

[0035] In this embodiment, the adjustable support 14 provides support for the entire electronic reading microscope 6 and can adjust its overall position and angle to meet measurement needs; the microscope body 15 serves as the core structure, connecting and fixing the eyepiece 16 and the objective lens 17. The objective lens 17 is aligned with the interference fringes to perform initial magnification imaging of the target, and then the image is transmitted to the eyepiece 16 through the internal optical system of the microscope body 15. The eyepiece 16 further magnifies the image, making it easier for the observer to observe clearly, and at the same time, the image signal is transmitted to the control processor 7; the reflector 18 can be rotated to adjust its angle, vertically reflecting the light from the sodium lamp source onto the two glass plates. Adjusting the adjustable support 14 makes the equal-thickness interference fringes clearly visible, facilitating accurate observation and counting.

[0036] A fan 19 is fixed on the upper end of the base plate 2. The fan 19 is located inside the outer shell 1. An air curtain outlet pipe 20 is fixed on the upper end of the outer shell 1. The air inlet end of the air curtain outlet pipe 20 is connected to the air outlet end of the fan 19. The air outlet end of the air curtain outlet pipe 20 faces downward. The air curtain outlet pipe 20 is located above the sliding door 4.

[0037] In this embodiment, when the fan 19 at the upper end of the base plate 2 is working, it draws in and pressurizes the air inside the outer casing 1, and then discharges it through the air curtain outlet pipe 20 connected to the air outlet end of the fan 19. Since the air curtain outlet pipe 20 is fixed at the upper end of the outer casing 1 and the air outlet end faces downward and is located above the sliding door 4, the discharged airflow will form a downward air curtain at the sliding door 4. This air curtain can effectively block external dust and impurities from entering the interior of the outer casing 1 through the gap between the sliding door 4 and the outer casing 1. At the same time, the precision core components such as the displacement component 5 and the electronic reading microscope 6 provide a clean working environment, reducing the impact of external pollutants on the measurement accuracy, and also helping to enhance the dustproof effect of the outer casing 1.

[0038] The inner surface of the outer casing 1 is provided with a matte coating. The matte coating is a solidified coating applied to the inner surface of the outer casing 1. The matte coating is made of black matte paint. The sliding door 4 is provided with an observation window 21, and a transparent acrylic plate is fixed inside the observation window 21.

[0039] In this embodiment, the black matte paint has a low reflectivity, which can effectively absorb stray light inside the housing 1, reduce the reflection and scattering of light on the inner wall of the housing 1, avoid excess light from interfering with the observation of equal-thickness interference fringes by the electron reading microscope 6, ensure stable light and clear contrast in the observation area, thereby improving the accuracy of optical signals during the measurement of minute displacements, enhancing the instrument's anti-interference capability, and the observation window 21 facilitates the observation of the inside of the housing 1.

[0040] The mounting bracket 8 is equipped with a sodium lamp fixing bracket 22 that slides vertically along its upper and lower sides.

[0041] In this embodiment, the height of the sodium lamp mounted on the mounting bracket can be flexibly adjusted by sliding the sodium lamp mounting bracket 22 up and down along the mounting bracket 8. This allows the sodium lamp light source to be aligned with the air wedge formed by two glass plates on the displacement component 5, ensuring that the sodium lamp light shines on the air wedge at a suitable angle under the reflection of the reflector 18, thereby forming clear and stable equal-thickness interference fringes. This provides good optical conditions for observation by the electron reading microscope 6 and ensures the accuracy of micro-displacement measurement.

[0042] A movable plate 23 is slidably provided on the upper end of the base plate 2 in the front-back direction. The displacement component 5 and the electron reading microscope 6 are both fixed on the upper end of the movable plate 23. A handle 24 is fixed on the front end of the movable plate 23.

[0043] In this embodiment, by holding the handle 24 and pushing and pulling the moving plate 23, the displacement component 5 and the electronic reading microscope 6 fixed on the upper end of the moving plate 23 can be moved synchronously in the front and back direction. This makes it convenient to move the displacement component 5 and the electronic reading microscope 6 out of the housing 1 as a whole when the moving door 4 is opened. This facilitates the installation, removal, adjustment or maintenance of components such as glass plates on them. After the operation is completed, they can be pushed back to the working position inside the housing 1 to ensure that the measurement work is carried out normally, while maintaining the relative position of each component and not affecting the measurement accuracy.

[0044] The working principle of this utility model is as follows: Before measurement, open the movable door 4, and push and pull the movable plate 23 that slides along the front and back direction at the upper end of the base plate 2 by holding the handle 24. Move the displacement component 5 and the electronic reading microscope 6 fixed on the movable plate 23 out of the outer shell 1 as a whole. Fix the two glass plates that form a fixed angle on the upper parallel platform 12 and the lower parallel platform 13 of the displacement component 5 respectively to form an air wedge. Then push them back into the working position inside the outer shell 1 and close the movable door 4. At the same time, slide the sodium lamp fixing bracket 22 up and down along the mounting bracket 8 to adjust the height of the sodium lamp light source. Adjust the overall position and angle through the adjustable bracket 14 of the electronic reading microscope 6 so that the objective lens 17 is aligned with the air wedge. Rotate the reflector 18 so that the light source illuminates the air wedge at a vertical angle under the reflection of the reflector 18. The light is transmitted through the internal optical system of the microscope body 15 so that the eyepiece 16 can clearly observe the equal thickness interference fringes. The image signal is transmitted to the external display screen through the control processor 7.

[0045] During measurement, the rocker arm 10 of the displacement assembly 5 is rotated, which drives the lead screw 9 to rotate on the mounting frame 8. Since the lead screw 9 is connected to the moving block 11 and the moving block 11 slides vertically along the mounting frame 8, the rotational motion of the lead screw 9 is converted into the vertical linear motion of the moving block 11, causing the upper parallel platform 12 and the lower parallel platform 13 to produce relative displacement, which causes the two glass plates to undergo slight displacement, resulting in the equal-thickness interference fringes moving in a certain direction. The number of fringes moved is counted by the display screen and the electronic reading microscope 6, and the value of the slight displacement is calculated by combining the physical principles.

[0046] Throughout the process, the matte black paint coating on the inner surface of the outer casing 1 absorbs stray light, reduces reflection and scattering, and avoids interference with observation. The shock-absorbing feet 3 at the four corners of the bottom plate 2 reduce external vibration interference. The airflow generated by the fan 19 forms a downward air curtain at the sliding door 4 through the air curtain outlet pipe 20, blocking external dust and impurities from entering. This provides a clean and stable working environment for precision components such as the displacement component 5 and the electronic reading microscope 6, ensuring measurement accuracy.

[0047] In summary, by setting up the outer shell 1, the shock-absorbing feet 3, the fan 19, and the air curtain outlet pipe 20, the shock-absorbing feet 3 effectively reduce external vibration interference; the black matte paint coating on the inner surface of the outer shell 1 can absorb stray light and avoid the influence of light reflection on the observation; the air curtain formed by the fan 19 and the air curtain outlet pipe 20 can block dust from entering, and multiple protections ensure the stability of the measurement environment and improve anti-interference performance.

[0048] By combining the displacement component 5 with the electron reading microscope 6, precise micro-displacement can be achieved with high accuracy. The electron reading microscope 6 can magnify the interference fringes of equal thickness. Combined with the image transmitted by the control processor 7, it can accurately count the number of fringes that have moved, ensuring the accuracy of the measurement results.

[0049] This instrument has a reasonable structural design, compact layout of components, high measurement accuracy, simple operation, and low cost. It is suitable for teaching experiments and engineering measurement, and provides a new technical means for the accurate measurement of minute displacements.

[0050] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An anti-interference micro-displacement measuring instrument, comprising a housing (1), a base plate (2), a displacement assembly (5), an electron reading microscope (6), and a control processor (7), characterized in that, The outer shell (1) is fixed to the upper end of the base plate (2). The four corners of the lower end of the base plate (2) are fixed with shock-absorbing feet (3). The displacement component (5) and the electronic reading microscope (6) are both set on the upper end of the base plate (2). The displacement component (5) and the electronic reading microscope (6) are both located inside the outer shell (1). The displacement component (5) is located behind the electronic reading microscope (6). The control processor (7) is fixed to the upper end of the base plate (2) and is located inside the outer shell (1). A sliding door (4) is provided on the side wall of the outer shell (1). The positions of the displacement component (5) and the electronic reading microscope (6) correspond to the sliding door (4). The electronic reading microscope (6) is electrically connected to the control processor (7). The control processor (7) is electrically connected to the display screen of the peripheral device.

2. The anti-interference micro-displacement measuring instrument according to claim 1, characterized in that, The displacement component (5) includes a mounting frame (8), which is set on the upper end of the base plate (2). A vertical lead screw (9) is rotatably mounted on the mounting frame (8). The upper end of the lead screw (9) passes through the mounting frame (8) and is fixed with a rocker arm (10). A moving block (11) is slidably mounted on the mounting frame (8) in the vertical direction. The lead screw (9) and the moving block (11) are connected in a transmission. A lower parallel platform (13) is fixed on one side of the lower end of the mounting frame (8), and an upper parallel platform (12) is fixed on one side of the moving block (11). The position and specifications of the upper parallel platform (12) correspond to those of the lower parallel platform (13).

3. The anti-interference micro-displacement measuring instrument according to claim 2, characterized in that, The electronic reading microscope (6) mainly consists of an adjustable support (14), a microscope body (15), an eyepiece (16), an objective lens (17), and a reflector (18). The adjustable support (14) is set at the upper end of the base plate (2). The microscope body (15) is fixed on the adjustable support (14). The eyepiece (16) and the objective lens (17) are respectively set at the upper and lower ends of the microscope body (15). The reflector (18) is rotatably set on the adjustable support (14) and is located below the objective lens (17).

4. The anti-interference micro-displacement measuring instrument according to claim 3, characterized in that, A fan (19) is fixed at the upper end of the base plate (2). The fan (19) is located inside the outer shell (1). An air curtain outlet pipe (20) is fixed at the upper end of the outer shell (1). The air inlet of the air curtain outlet pipe (20) is connected to the air outlet of the fan (19). The air outlet of the air curtain outlet pipe (20) faces downward. The air curtain outlet pipe (20) is located above the movable door (4).

5. The anti-interference micro-displacement measuring instrument according to claim 4, characterized in that, The inner surface of the outer shell (1) is provided with a matte coating. The matte coating is a solidified coating applied to the inner surface of the outer shell (1). The matte coating is made of black matte paint. An observation window (21) is provided on the movable door (4). A transparent acrylic plate is fixed inside the observation window (21).

6. The anti-interference micro-displacement measuring instrument according to claim 5, characterized in that, The mounting bracket (8) is provided with a sodium lamp fixing bracket (22) that slides along the vertical direction.

7. The anti-interference micro-displacement measuring instrument according to claim 6, characterized in that, The upper end of the base plate (2) is provided with a movable plate (23) that slides along the front-back direction. The displacement component (5) and the electron reading microscope (6) are both fixed on the upper end of the movable plate (23). A handle (24) is fixed on the front end of the movable plate (23).

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