A device for measuring ground settlement cracks in mining areas

Abstract

The present invention relates to the technical field of crack monitoring, and particularly relates to a device for measuring ground settlement cracks in mining areas, which includes a support assembly, a lifting assembly, a detection assembly, a main control screen, and a bottom plate equipped with universal wheels. The upper surface of the bottom plate is fixed with a bracket, and two handles are installed on one side of the bracket. The main control screen is installed at the upper end of the bracket; through the cooperation of the detection assembly, the crack width measurement assembly, and the settlement measurement assembly, the lifting assembly drives the detection assembly to move, and the detection head is inserted into the interior of the crack until the outer wall of the detection head fits against both sides of the crack. By using the positioning plate to select the positioning reference point on one side of the crack, and then measuring the crack width of the crack and the depth of settlement on the other side of the crack through the crack width measurement assembly and the settlement measurement assembly respectively. By measuring the crack width and the settlement depth, a variety of data are provided for subsequent analysis, which is conducive to the improvement of subsequent analysis data.

Description

Technical Field

[0001] The present invention belongs to the technical field of crack measurement, and particularly relates to a device for measuring ground settlement cracks in mining areas. Background Art

[0002] Due to the dynamic changes of the soil around the mining area during the mining process, the ground will collapse and subside, resulting in cracks on the ground. In order to ensure the production safety of the mining area, it is necessary to monitor the ground settlement, etc. When cracks appear on the ground, it is necessary to measure the size of the cracks and the settlement data in real time, so as to facilitate pre-estimation and timely take corresponding measures. At present, when scientific researchers conduct ground surveys and measurements in mining areas, they generally directly measure the opening distance and offset distance of ground fissures through measuring tools such as tape measures or flexible rulers. However, it is difficult to ensure the levelness and perpendicularity of the measuring tools, resulting in large errors in the measured data, which is not conducive to the development of subsequent analysis work.

[0003] For example, in the patent document: a portable ground fissure measuring device with an application number of 202110336685.7, the device has a simple structure, is easy to carry and operate, can ensure the levelness and perpendicularity of the measurement, and quickly calibrate the measurement starting point and measurement end point, and the accuracy of the measured data is higher.

[0004] However, this device still has the following defects:

[0005] It is not convenient to measure the width of cracks at different positions in the mining area and the settlement depth of the ground on both sides of the cracks, resulting in incomplete data for subsequent analysis. Therefore, we need to propose a device for measuring ground settlement cracks in mining areas to solve the above problems. Summary of the Invention

[0006] In view of the above problems, the present invention provides a device for measuring ground settlement cracks in mining areas, including a support assembly, a lifting assembly, a detection assembly, a main control screen, and a bottom plate installed with universal wheels. A bracket is fixed on the upper surface of the bottom plate, two handles are installed on one side of the bracket, the main control screen is installed at the upper end of the bracket, the support assembly is fixed on the upper surface of the bottom plate and is fixed to one side of the bracket, one end of the lifting assembly is connected to the upper end of the bracket, and the other end of the lifting assembly is connected to the detection assembly. The detection assembly includes a hollow vertical tube and a conical detection head. The upper end of the detection head is fixed to the lower end of the vertical tube. A moving assembly is installed on the vertical tube, a positioning plate is installed on the moving assembly, a crack width measurement assembly and a settlement measurement assembly are installed on the positioning plate, and the installation direction of the crack width measurement assembly is perpendicular to the installation direction of the settlement measurement assembly. A rectangular opening is formed in the center of the positioning plate, and the crack width measurement assembly is installed inside the opening;

[0007] The seam width measuring assembly comprises a driving mechanism, a bidirectional screw and a guide rod, the two ends of the bidirectional screw are rotatably connected to the opposite sides of the opening, the two ends of the bidirectional screw are threadedly connected to distance measuring plates, the lower edge of the distance measuring plates is flush with the lower surface of the positioning plate, one end of the two distance measuring plates is slidably connected to the other side of the opening, and one end of the bidirectional screw is fixed with a driven gear, which is driven by the driving mechanism;

[0008] The settlement measurement assembly includes a third motor, a second screw, an L-shaped rod and a moving block. The third motor is mounted on the support rod. Both ends of the second screw are rotatably connected to the upper surface of the positioning plate and the support rod respectively. One end of the second screw passes through the support rod and is connected to the output shaft of the third motor. One end of the L-shaped rod is threadedly connected to the second screw, and one end of the L-shaped rod is slidably connected to one of the connecting rods. The other end of the L-shaped rod is fixed to the moving block. A first reflector is fixed to the upper surface of the moving block, and a first infrared ranging sensor is fixed to the support rod.

[0009] Furthermore, the lifting assembly includes an electric push rod and a fixed seat, one end of the electric push rod is fixed to the lower surface of the horizontal plate, the piston rod end of the electric push rod is connected to one end of the fixed seat, and the other end of the fixed seat is fixed to the upper end of the vertical pipe.

[0010] Furthermore, the support assembly includes a vertical plate and a horizontal plate, one end of the vertical plate is vertically fixed to one end of the horizontal plate, and one side of the horizontal plate is fixed to the side wall of the main control screen.

[0011] Furthermore, the moving assembly includes a first screw rod, a support rod and a first motor, the first screw rod is rotatably installed inside the vertical tube, one end of the first screw rod passes through the upper end of the vertical tube and is connected to the output shaft of the first motor, the support seat of the first motor is fixed to the upper end of the vertical tube, and the other end of the fixed seat is provided with a clearance hole for the first motor to make way, the middle part of the support rod is threadedly connected to the first screw rod, the two ends of the support rod are vertically fixed with connecting rods passing through the side walls of the vertical tube, and the vertical tube is provided with a first sliding groove for the two ends of the support rod to slide, and one end of the connecting rod is fixed to the upper surface of the positioning plate.

[0012] Furthermore, the driving assembly includes a fixed block, a second motor and a driving gear, the fixed block is fixed on the upper surface of the positioning plate, the second motor is mounted on the fixed block, the driving gear is mounted on the output shaft of the second motor, and the driving gear is meshed with the driven gear.

[0013] Further, the ranging board includes a sliding block and a detection block. A threaded hole for screwing the bidirectional screw is provided on the sliding block. One side of the detection block is fixed to one side of the sliding block. A distance sensing mechanism is provided on the sliding block. An inclined surface is provided on the other side of the detection block, and the inclined surface of the detection block corresponds to the inclined surface of the detection head.

[0014] Further, the distance sensing mechanism includes a second infrared ranging sensor and a second reflector. The second infrared ranging sensor is fixed at the lower edge position of one side of the sliding block, and the second reflector is fixed at the lower edge position of the other side of the sliding block.

[0015] Further, a convex block is integrally formed at one end of the sliding block. A second sliding groove for the two convex blocks to slide is provided on the other side of the opening. A guide rod is provided below the bidirectional screw, and both sliding blocks are slidably connected to the guide rod.

[0016] Further, a protrusion is integrally formed at one end of the L-shaped rod. A third sliding groove for the protrusion to slide is provided on one side of one of the connecting rods.

[0017] Further, the main control screen is electrically connected to the first motor, the second motor, the third motor, the electric push rod, the first infrared ranging sensor, and the second infrared ranging sensor. Touch sensors are embedded in the lower surfaces of the positioning plate and the moving block and the inclined surface of the detection block, and multiple touch sensors are electrically connected to the main control screen.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. Through the cooperation of the detection component, the seam width measurement component, and the settlement measurement component, the lifting component drives the detection component to move, the detection head is inserted into the gap, and the outer wall of the detection head fits against both sides of the gap. By selecting the positioning reference point on one side of the gap through the positioning plate, and then measuring the seam width of the gap and the settlement depth on the other side of the gap respectively through the seam width measurement component and the settlement measurement component. By measuring the crack seam width and settlement depth, a variety of data are provided for subsequent analysis, which is beneficial to the improvement of subsequent analysis data.

[0020] 2. Through the cooperation of the bottom plate and the support component, it is convenient to move when measuring the seam width at different positions of the crack, improving the convenience when measuring different positions of the crack.

[0021] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures pointed out in the specification, the claims, and the drawings. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0023] Figure 1 Shows a schematic structural diagram according to an embodiment of the present invention;

[0024] Figure 2 Shows a schematic structural diagram of a support assembly and a lifting assembly according to an embodiment of the present invention;

[0025] Figure 3 Shows a schematic structural diagram of a moving assembly and a detection assembly according to an embodiment of the present invention;

[0026] Figure 4 Shows a schematic structural diagram of a seam width measurement assembly according to an embodiment of the present invention;

[0027] Figure 5 Shows an exploded structural diagram of a seam width measurement assembly according to an embodiment of the present invention;

[0028] Figure 6 Shows a schematic structural diagram of a settlement measurement assembly according to an embodiment of the present invention.

[0029] In the figure: 1, support; 2, handle; 3, main control screen; 4, support assembly; 401, vertical plate; 402, horizontal plate; 5, lifting assembly; 501, fixed seat; 502, electric push rod; 6, detection assembly; 601, vertical tube; 602, detection head; 7, moving assembly; 701, first screw; 702, support rod; 703, connecting rod; 704, first motor; 8, positioning plate; 9, seam width measurement assembly; 901, drive mechanism; 9011, fixed block; 9012, second motor; 9013, driving gear; 902, bidirectional screw; 903, ranging plate; 9031, detection block; 9032, sliding block; 9033, convex block; 904, guide rod; 10, bottom plate; 11, settlement measurement assembly; 1101, third motor; 1102, second screw; 1103, L-shaped rod; 1104, moving block; 1105, third chute; 1106, protrusion; 12, relief hole; 13, first chute; 14, first infrared ranging sensor; 15, opening; 16, second chute; 17, first reflector; 18, second infrared ranging sensor. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0031] An embodiment of the present invention provides a device for measuring ground settlement cracks in a mining area. As Figure 1 and Figure 3 shown, it includes a support assembly 4, a lifting assembly 5, a detection assembly 6, a main control screen 3, and a bottom plate 10 equipped with universal wheels. The upper surface of the bottom plate 10 is fixed with a bracket 1. Two handles 2 are installed on one side of the bracket 1. The main control screen 3 is installed at the upper end of the bracket 1. The support assembly 4 is fixed on the upper surface of the bottom plate 10 and is fixed to one side of the bracket 1. One end of the lifting assembly 5 is connected to the upper end of the bracket 1, and the other end of the lifting assembly 5 is connected to the detection assembly 6. The detection assembly 6 includes a hollow vertical tube 601 and a conical detection head 602. The upper end of the detection head 602 is fixed to the lower end of the vertical tube 601. A moving assembly 7 is installed on the vertical tube 601. A positioning plate 8 is installed on the moving assembly 7. A crack width measurement assembly 9 and a settlement measurement assembly 11 are installed on the positioning plate 8, and the installation direction of the crack width measurement assembly 9 is perpendicular to the installation direction of the settlement measurement assembly 11.

[0032] A rectangular opening 15 is formed in the center of the positioning plate 8. The crack width measurement assembly 9 is installed inside the opening 15. The length and width of the opening 15 are both larger than the diameter of the vertical tube 601, facilitating the positioning plate 8 to move up or down on the vertical tube 601.

[0033] As Figure 2 shown, a notch is provided on the bottom plate 10. The bottom plate 10 is aligned with the notch, enabling the detection assembly 6 to pass through the notch to measure the cracks on the ground. The support assembly 4 includes a vertical plate 401 and a horizontal plate 402. One end of the vertical plate 401 is vertically fixed to one end of the horizontal plate 402. One side of the horizontal plate 402 is fixed to the side wall of the main control screen 3, supporting and fixing the lifting assembly 5 and the detection assembly 6 through the support assembly 4.

[0034] The lifting assembly 5 includes an electric push rod 502 and a fixed seat 501. One end of the electric push rod 502 is fixed to the lower surface of the cross plate 402. The piston rod end of the electric push rod 502 is connected to one end of the fixed seat 501. The other end of the fixed seat 501 is fixed to the upper end of the vertical pipe 601. The electric push rod 502 drives the fixed seat 501 to move up and down, so that the fixed seat 501 drives the detection assembly 6 to move up and down.

[0035] As Figure 3 shown, the moving assembly 7 includes a first screw rod 701, a support rod 702 and a first motor 704. The first screw rod 701 is rotatably installed inside the vertical pipe 601. One end of the first screw rod 701 passes through the upper end of the vertical pipe 601 and is connected to the output shaft of the first motor 704. The support seat of the first motor 704 is fixed to the upper end of the vertical pipe 601. And a relief hole 12 for the first motor 704 to give way is provided at the other end of the fixed seat 501. The middle of the support rod 702 is threadedly connected to the first screw rod 701. Both ends of the support rod 702 pass through the side wall of the vertical pipe 601 and are vertically fixed with connecting rods 703. And a first sliding groove 13 for both ends of the support rod 702 to slide is provided on the vertical pipe 601. One end of the connecting rod 703 is fixed to the upper surface of the positioning plate 8. The first motor 704 drives the first screw rod 701 to rotate. Due to the threaded fit between the first screw rod 701 and the support rod 702, the support rod 702 moves up or down on the first screw rod 701. The positioning plate 8 is driven by the first support rod 702 to move, so as to facilitate the positioning plate 8 to be attached to the ground for selecting the starting reference point during measurement.

[0036] As Figure 4 and Figure 5 shown, the slit width measuring assembly 9 includes a driving mechanism 901, a bidirectional screw rod 902 and a guide rod 904. Both ends of the bidirectional screw rod 902 are rotatably connected to opposite sides of the opening 15. Threaded connection plates 903 are connected to both ends of the bidirectional screw rod 902. The lower edge of the distance measuring plate 903 is flush with the lower surface of the positioning plate 8. One ends of the two distance measuring plates 903 are both slidably connected to the other side of the opening 15. A driven gear is fixed to one end of the bidirectional screw rod 902. The driven gear is driven by the driving mechanism 901. During slit width measurement, the driving mechanism 901 drives the bidirectional screw rod 902 to rotate. The bidirectional screw rod 902 drives the two distance measuring plates 903 to move relatively, so that one sides of the two distance measuring plates 903 abut against opposite sides of the detection head 602, facilitating measuring the diameter of the detection head 602 at the slit, and thus measuring the width of the slit.

[0037] The driving component includes a fixed block 9011, a second motor 9012 and a driving gear 9013. The fixed block 9011 is fixed on the upper surface of the positioning plate 8. The second motor 9012 is installed on the fixed block 9011. The driving gear 9013 is installed on the output shaft of the second motor 9012, and the driving gear 9013 meshes with the driven gear. By driving the driving gear 9013 to rotate with the second motor 9012, the driving gear 9013 drives the bidirectional screw 902 to rotate through meshing with the driven gear, facilitating the relative movement of the distance measuring plate 903 driven by the bidirectional screw 902.

[0038] The distance measuring plate 903 includes a sliding block 9032 and a detection block 9031. A threaded hole for screwing the bidirectional screw 902 is provided on the sliding block 9032. One side of the detection block 9031 is fixed to one side of the sliding block 9032. A distance sensing mechanism is provided on the sliding block 9032. An inclined surface is provided on the other side of the detection block 9031, and the inclined surface of the detection block 9031 corresponds to the inclined surface of the detection head 602, enabling the detection block 9031 to fit closely to the outer wall of the detection head 602.

[0039] The distance sensing mechanism includes a second infrared distance sensor 18 and a second reflector. The second infrared distance sensor 18 is fixed at the lower edge position on one side of the sliding block 9032. The second reflector is fixed at the lower edge position on one side of the other sliding block 9032. The infrared light emitted by the infrared distance sensor is directed to the second reflector, and the distance between the two sliding blocks 9032 is measured by the reflection of the second reflector, eliminating the need for manual measurement with measuring tools and improving the measurement accuracy.

[0040] A convex block 9033 is integrally formed at one end of the sliding block 9032. A second chute 16 for the two convex blocks 9033 to slide is provided on the other side of the opening 15. A guide rod 904 is provided below the bidirectional screw 902. Both sliding blocks 9032 are slidably connected to the guide rod 904. Through the cooperation of the guide rod 904 and the convex block 9033 with the second chute 16, the sliding block 9032 can perform horizontal linear movement during movement, improving the accuracy of the measurement by the detection block 9031 to a certain extent.

[0041] Such as Figure 6As shown, the settlement measurement assembly 11 includes a third motor 1101, a second screw rod 1102, an L-shaped rod 1103, and a moving block 1104. The third motor 1101 is installed on the support rod 702. The two ends of the second screw rod 1102 are respectively rotatably connected to the upper surface of the positioning plate 8 and the support rod 702. One end of the second screw rod 1102 passes through the support rod 702 and is connected to the output shaft of the third motor 1101. One end of the L-shaped rod 1103 is threadedly connected to the second screw rod 1102, and one end of the L-shaped rod 1103 is slidably connected to one of the connecting rods 703. The other end of the L-shaped rod 1103 is fixed to the moving block 1104. A first reflector 17 is fixed on the upper surface of the moving block 1104. A first infrared distance measuring sensor 14 is fixed on the support rod 702. By driving the second screw rod 1102 to rotate through the third motor 1101, the L-shaped rod 1103 moves up or down on the second screw rod 1102. While the L-shaped rod 1103 is moving, it drives the moving block 1104 to move. Through the cooperation of the first infrared distance measuring sensor 14 and the first reflector 17, it is convenient to measure the displacement distance of the moving block 1104, so as to measure the settlement depth on one side of the crack.

[0042] A protrusion 1106 is integrally formed at one end of the L-shaped rod 1103. A third chute 1105 for the protrusion 1106 to slide is formed on one side of one of the connecting rods 703, so that the L-shaped rod 1103 can move up or down linearly on the second screw rod 1102. When the horizontal part of the L-shaped rod 1103 is in contact with the lower surface of the support rod 702, the lower surface of the moving block 1104 is flush with the lower surface of the positioning plate 8, and the upper surface of the moving block 1104 is flush with the upper surface of the positioning plate 8. When measuring the settlement distance of the crack, the downward displacement distance of the moving block 1104 is the settlement depth.

[0043] The main control screen 3 is electrically connected to the first motor 704, the second motor 9012, the third motor 1101, the electric push rod 502, the first infrared distance measuring sensor 14, and the second infrared distance measuring sensor 18. Touch sensors are embedded in the lower surfaces of the positioning plate 8 and the moving block 1104 and the inclined surface of the detection block 9031. A plurality of the touch sensors are all electrically connected to the main control screen 3, which is convenient for the main control screen 3 to respectively control the start and stop of the first motor 704, the second motor 9012, the third motor 1101, and the electric push rod 502 according to the induction data of the touch sensors.

[0044] In use, the device is pushed to move through the handle 2, so that the universal wheels on the bottom plate 10 are all located on one side of the gap. The vertical pipe 601 is driven to move downward by the electric push rod 502, so that the vertical pipe 601 drives the detection head 602 to insert into the interior of the gap. When the outer walls on the opposite sides of the detection head 602 are in contact with both sides of the gap, it stops. The main control screen 3 controls the first motor 704 to start. The first motor 704 drives the first screw rod 701 to rotate, and the first screw rod 701 drives the support rod 702 to move downward, so that the support rod 702 drives the positioning plate 8 to move downward. When the lower surface of the positioning plate 8 is in contact with one side of the gap, the touch sensor located on the positioning plate 8 sends out a control signal for measuring the distance between the two detection blocks 9031, which is convenient for measuring the width of the gap. At the same time, the third motor 1101 is controlled to start. The third motor 1101 drives the second screw rod 1102 to rotate, so that the second screw rod 1102 drives the L-shaped rod 1103 to move downward. When the moving block 1104 is in contact with the other surface of the gap, the touch sensor located on the moving block 1104 sends out a signal for measuring the displacement distance of the moving block 1104, which is convenient for measuring the settlement depth of the gap. Through the measurement of the crack width and settlement depth, a variety of data are provided for subsequent analysis, which is beneficial to the improvement of the subsequent analysis data. Moreover, universal wheels are installed on the lower surface of the bottom plate 10, which is convenient for moving when measuring the crack width at different positions, and improves the convenience of measuring the crack at different positions.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring ground settlement cracks in a mining area, characterized in that: It includes a support component (4), a lifting component (5), a detection component (6), a main control screen (3), and a bottom plate (10) equipped with universal wheels. A bracket (1) is fixed on the upper surface of the bottom plate (10). Two handles (2) are installed on one side of the bracket (1). The main control screen (3) is installed at the upper end of the bracket (1). The support component (4) is fixed on the upper surface of the bottom plate (10) and is fixed to one side of the bracket (1). One end of the lifting component (5) is connected to the upper end of the bracket (1), and the other end of the lifting component (5) is connected to the detection component (6). The detection component (6) includes a hollow vertical tube (601) and a conical detection head (602). The upper end of the detection head (602) is fixed to the lower end of the vertical tube (601). A moving component (7) is installed on the vertical tube (601). A positioning plate (8) is installed on the moving component (7). A slit width measuring component (9) and a settlement measuring component (11) are installed on the positioning plate (8). The installation direction of the slit width measuring component (9) is perpendicular to the installation direction of the settlement measuring component (11). A rectangular opening (15) is formed at the center of the positioning plate (8). The slit width measuring component (9) is installed inside the opening (15). The slit width measuring component (9) includes a driving mechanism (901), a bidirectional screw (902), and a guide rod (904). The two ends of the bidirectional screw (902) are rotatably connected to opposite sides of the opening (15). Distance measuring plates (903) are threadedly connected to the two ends of the bidirectional screw (902). The lower edge of the distance measuring plate (903) is flush with the lower surface of the positioning plate (8). One end of each of the two distance measuring plates (903) is slidably connected to the other side of the opening (15). A driven gear is fixed to one end of the bidirectional screw (902), and the driven gear is driven by the driving mechanism (901). The settlement measuring component (11) includes a third motor (1101), a second screw (1102), an L-shaped rod (1103), and a moving block (1104). The third motor (1101) is installed on a support rod (702). The two ends of the second screw (1102) are respectively rotatably connected to the upper surface of the positioning plate (8) and the support rod (702). One end of the second screw (1102) passes through the support rod (702) and is connected to the output shaft of the third motor (1101). One end of the L-shaped rod (1103) is threadedly connected to the second screw (1102), and one end of the L-shaped rod (1103) is slidably connected to one of the connecting rods (703). The other end of the L-shaped rod (1103) is fixed to the moving block (1104). A first reflector (17) is fixed on the upper surface of the moving block (1104). A first infrared distance measuring sensor (14) is fixed on the support rod (702). The distance measuring plate (903) comprises a sliding block (9032) and a detection block (9031); the sliding block (9032) is provided with a screw hole for the bidirectional screw rod (902) to be screwed; one side of the detection block (9031) is fixed to one side of the sliding block (9032); the sliding block (9032) is provided with a distance sensing mechanism; the other side of the detection block (9031) is provided with an inclined surface, and the inclined surface of the detection block (9031) corresponds to the inclined surface of the detection head (602).

2. The measurement device for ground settlement cracks in a mining area according to claim 1, characterized in that: The lifting assembly (5) comprises an electric push rod (502) and a fixed seat (501), one end of the electric push rod (502) is fixed to the lower surface of the horizontal plate (402), the piston rod end of the electric push rod (502) is connected to one end of the fixed seat (501), and the other end of the fixed seat (501) is fixed to the upper end of the vertical pipe (601).

3. The device for measuring ground settlement cracks in mining areas according to claim 2, wherein: The support assembly (4) comprises a vertical plate (401) and a horizontal plate (402), one end of the vertical plate (401) is vertically fixed to one end of the horizontal plate (402), and one side of the horizontal plate (402) is fixed to the side wall of the main control screen (3).

4. A device for measuring ground settlement cracks in a mining area according to claim 2, characterized in that: The moving assembly (7) comprises a first screw rod (701), a support rod (702) and a first motor (704); the first screw rod (701) is rotatably mounted inside the vertical tube (601); one end of the first screw rod (701) passes through the upper end of the vertical tube (601) and is connected to the output shaft of the first motor (704); a support seat of the first motor (704) is fixed to the upper end of the vertical tube (601); and a clearance hole (12) for the first motor (704) to make way is provided at the other end of the fixed seat (501); the middle part of the support rod (702) is threadedly connected to the first screw rod (701); two ends of the support rod (702) pass through the side wall of the vertical tube (601) and are vertically fixed with a connecting rod (703); and a first sliding groove (13) for the two ends of the support rod (702) to slide is provided on the vertical tube (601); and one end of the connecting rod (703) is fixed to the upper surface of the positioning plate (8).

5. The measurement device for ground settlement cracks in mining areas according to claim 1, characterized in that: The driving mechanism comprises a fixed block (9011), a second motor (9012) and a driving gear (9013); the fixed block (9011) is fixed on the upper surface of the positioning plate (8); the second motor (9012) is mounted on the fixed block (9011); the driving gear (9013) is mounted on the output shaft of the second motor (9012); and the driving gear (9013) is meshed with the driven gear.

6. The measurement device for ground settlement cracks in a mining area according to claim 1, characterized in that: The distance sensing mechanism comprises a second infrared distance measuring sensor (18) and a second reflecting plate, wherein the second infrared distance measuring sensor (18) is fixed at the lower edge position of one side of one sliding block (9032), and the second reflecting plate is fixed at the lower edge position of the other side of the sliding block (9032).

7. The device for measuring ground settlement cracks in mining areas according to claim 6, wherein: One end of the sliding block (9032) is integrally formed with a convex block (9033). On the other side of the opening (15), a second sliding groove (16) for the two convex blocks (9033) to slide is provided. Below the bidirectional screw rod (902), a guide rod (904) is provided, and the two sliding blocks (9032) are both slidably connected to the guide rod (904).

8. A device for measuring ground settlement cracks in a mining area according to claim 1, characterized in that: One end of the L-shaped rod (1103) is integrally formed with a protrusion (1106). On one side of one of the connecting rods (703), a third sliding groove (1105) for the protrusion (1106) to slide is provided.

9. The device for measuring ground settlement cracks in a mining area according to claim 1, characterized in that: The main control screen (3) is electrically connected to the first motor (704), the second motor (9012), the third motor (1101), the electric push rod (502), the first infrared ranging sensor (14) and the second infrared ranging sensor (18). Touch sensors are embedded on the lower surfaces of the positioning plate (8) and the moving block (1104) and on the inclined surface of the detection block (9031), and multiple touch sensors are all electrically connected to the main control screen (3).

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