A geological disaster crack measurement device

Abstract

The present application relates to a geological disaster crack measurement device, belonging to the technical field of electromagnetic measurement devices, which includes a fixed plate, a plurality of measurement blocks are connected to the fixed plate, the lower side of each measurement block passes through the fixed plate and is slidably connected to the fixed plate, a camera is installed at one end of each measurement block passing through the fixed plate, a plurality of locking components are rotatably connected to the two opposite side walls of the fixed plate, and the end of each locking component away from the side wall of the connected fixed plate can be plugged into the crack and move with the crack, a spatial positioning sensor is installed on the locking component and the spatial positioning sensor can move with the end of the locking component and the adjacent crack, and each measurement block is connected to a spatial positioning sensor. The present application has the effect of achieving real-time monitoring of ground cracks.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic measuring devices, and in particular to a geological disaster crack measuring device. Background Art

[0002] Ground fissures are progressive disasters that develop progressively. According to their causes, they can be divided into two categories: one is tectonic ground fissures formed by internal forces, such as earthquake cracks, basement fault active ground fissures, hidden fissures opening cracks, etc.; the other is non-tectonic, that is, ground fissures formed by external forces, such as loose soil erosion ground fissures, loess collapse ground fissures, expansive soil expansion and contraction ground fissures, landslide ground fissures, etc. The extension of tectonic ground fissures is stable and is not affected by the surface topography, rock and soil properties and other geological conditions. It can cut through linear landforms such as ridges, steep slopes, and river terraces. The activity of tectonic ground fissures has obvious inheritance and periodicity. Tectonic ground fissures are often arranged in discontinuous broken lines, serrated or echeloned shapes on the plane; they are nearly vertical on the section, arranged in steps, grabens, and horsts.

[0003] Due to the complex causes of ground fissures, they may change over time. Currently, ground fissures are mostly measured manually, which leads to untimely monitoring of changes in ground fissures, thus affecting subsequent operations such as repairing ground fissures. Summary of the invention

[0004] In order to achieve real-time monitoring of ground fissures, the present application provides a geological disaster crack measurement device.

[0005] The present application provides a geological disaster crack measurement device that adopts the following technical solution:

[0006] A geological disaster crack measuring device comprises a fixed plate, to which a plurality of measuring blocks are connected, the lower side of each measuring block passes through the fixed plate and is slidably connected to the fixed plate, a camera is installed at one end of each measuring block passing through the fixed plate, a plurality of locking assemblies are rotatably connected to two opposite side walls of the fixed plate, one end of each locking assembly away from the side wall of the connected fixed plate can be inserted into the crack and move with the crack, a spatial positioning sensor is installed on the locking assembly and the spatial positioning sensor can move with the end of the locking assembly and adjacent cracks, and each measuring block is connected to a spatial positioning sensor.

[0007] By adopting the above technical solution, when it is necessary to measure the crack, the fixed plate is placed in the middle position of the crack and connected to the surrounding crack side walls through the locking assembly. Then, when the crack expands and causes the crack side walls to move, the locking assembly and the spatial positioning sensor on the locking assembly are driven to move, thereby changing the spatial position of the spatial positioning sensor. This allows the staff to monitor the changes in the crack by monitoring the spatial positioning sensor, and cooperate with the camera to monitor the internal conditions of the crack in real time, thereby reducing the phenomenon that it is difficult for the staff to grasp the changes in the crack in real time when manually measuring the crack.

[0008] Optionally, each of the locking assemblies includes a first sleeve with one end hinged to the fixed plate ball, a second sleeve is slidably inserted into the end of each of the first sleeves away from the connected fixed plate, a third sleeve is slidably inserted into the end of each of the second sleeves away from the fixed plate, a locking motor is fixedly connected to the interior of each of the third sleeves, the output shaft of each of the locking motors extends to the side away from the side wall of the connected fixed plate and is fixedly connected to a drill bit, and a locking electric push rod is connected to the interior of each of the second sleeves and can drive the third sleeve to move.

[0009] By adopting the above technical solution, when the locking assembly is needed to connect the side walls of the crack, the locking electric push rod is started to drive the drill bit to move in the direction close to the adjacent crack side walls, and at the same time, the locking motor is started, and the locking motor drives the drill bit to drill into the side walls of the crack, thereby realizing the process of connecting the fixed plate and the surrounding crack side walls through the locking assembly, and because the drill bit drills into the crack side walls, the crack side walls can drive the drill bit to move when moving.

[0010] Optionally, a tension spring capable of driving the second sleeve to move toward a side close to the fixed plate is internally connected to the first sleeve.

[0011] By adopting the above technical solution and arranging the tension spring, the phenomenon of measurement error caused by the second sleeve slipping relative to the first sleeve when the first sleeve and the second sleeve are in an inclined state is reduced.

[0012] Optionally, a drill tip is provided at the end of the drill bit, and the end of the drill tip close to the drill bit is fixedly connected to a pressure block slidably inserted into the interior of the drill bit, one side of the pressure block is abutted with an airbag, both sides of the airbag are abutted with push plates, and each of the push plates can move toward the direction approaching the adjacent drill bit side wall under the drive of the airbag when the airbag is squeezed and deformed, and each of the push plates is fixedly connected to a locking pin at one end that can penetrate the drill bit side wall on the side away from the airbag.

[0013] By adopting the above technical solution, when the drill bit drills into the side wall of the crack, the drill tip is squeezed by the side wall of the crack and moves toward the drill bit. Then, the drill tip drives the pressure block to abut against the airbag during the movement, thereby squeezing the airbag. When the airbag is squeezed, it squeezes the push plate around the airbag. When the push plate is squeezed, it drives the locking pin to move out of the drill bit and insert it into the side wall of the crack, thereby reducing the phenomenon that the side wall of the crack is difficult to drive the drill bit to move during the movement.

[0014] Optionally, a displacement component for driving the movement of the plurality of measuring blocks is connected to the fixed plate.

[0015] By adopting the above technical solution and setting a displacement component, it is possible to achieve that when the crack width changes, the measuring block and the camera connected to the measuring block can be driven to move by the displacement component, so that the camera can monitor the inside of the crack more evenly, making the monitoring result more comprehensive.

[0016] Optionally, the displacement assembly includes a connecting block fixedly connected to each of the measuring blocks, multiple connecting blocks located on the same side of the fixed plate are penetrated by and connected to the same bidirectional lead screw, and the connecting block located in the middle position is rotationally connected to the connected bidirectional lead screw, and the remaining connecting blocks are all threadedly connected to the bidirectional lead screw.

[0017] By adopting the above technical solution, when the crack size changes, the bidirectional lead screw is rotated, and the bidirectional lead screw drives multiple measuring blocks to move, so that the distance between the measuring blocks changes, thereby achieving full monitoring of the inside of the crack.

[0018] Optionally, the second sleeve near the middle position of the fixed plate is fixedly connected with a connecting rope on one side close to the fixed plate, and one end of the connecting rope away from the connected second sleeve is wrapped around the middle position of the adjacent bidirectional screw and can drive the bidirectional screw to rotate.

[0019] By adopting the above technical solution, when the crack side wall drives the drill bit to move, the drill bit drives the third sleeve and the second sleeve to move. The second sleeve drives the connecting rope to move during the movement. The connecting rope drives the bidirectional lead screw to rotate during the movement. The bidirectional lead screw drives the measuring block to move during the rotation, thereby reducing the waste caused by the need to add a motor to drive the rotation of the bidirectional lead screw.

[0020] Optionally, a connecting component is connected between the bidirectional lead screw and the camera, and the connecting component can drive the multiple cameras to move during the rotation of the bidirectional lead screw.

[0021] By adopting the above technical solution and setting up a connecting component, when the side wall of the crack increases, the bidirectional screw can drive the measuring block to move while driving the camera to move through the connecting component, so that when the crack size changes, the inside of the crack can be fully monitored by moving the camera.

[0022] Optionally, the connecting assembly includes a connecting rod connected to each of the cameras, the upper end of each connecting rod slides through the adjacent measuring block and is fixedly connected to a connecting screw, the connecting screw located in the middle position is threadedly sleeved on the outside with a driving gear, one side of the driving gear is meshed with a driven gear, the driven gear is fixedly connected to a driven bevel gear, one side of the driven bevel gear is meshed with a driving bevel gear, the driving bevel gear is fixedly sleeved to the outside of the bidirectional screw, the outer sides of the remaining connecting screws are threadedly sleeved with connecting gears, and one side of each connecting gear is meshed with a connecting rack, and the connecting rack is fixedly connected to the adjacent fixed plate.

[0023] By adopting the above technical solution, when the bidirectional screw rotates, the bidirectional screw drives the driving bevel gear to rotate, the driving bevel gear drives the driven bevel gear to rotate, and the driven bevel gear drives the driving gear to rotate during the rotation process, and the driving gear rotation drives the driven gear to rotate, and the driven gear drives the connected connecting screw to rotate during the rotation process, and the connecting screw drives the connecting rod and the camera to move downward during the rotation process; the measuring block drives the connecting gear to move during the movement process, and because the connecting gear is meshed with the connecting rack, the connecting gear can rotate during the movement process and then drive the connected connecting screw to move downward, and the connecting screw drives the connecting rod and the camera to move downward during the movement process, so that when the crack increases, multiple cameras are driven downward to fully monitor the inside of the crack.

[0024] Optionally, an ultrasonic transceiver probe is installed on the lower side of each camera.

[0025] By adopting the above technical solution, since an ultrasonic transceiver probe is provided, the inside of the crack can be fully monitored.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] By setting a fixing plate and a locking assembly, and the drill bit in the locking assembly can move with the expanding crack side wall, the locking assembly, the fixing plate and the multiple spatial positioning sensors can monitor the deformation of the crack in real time;

[0028] By setting a displacement component, and connecting the displacement component to the drill bit, when the crack is deformed, the displacement component can drive the multiple measuring blocks to move, so that the cameras carried by the multiple measuring blocks can monitor the crack more fully;

[0029] By setting up the connecting component, when the crack widens and the drill bit moves, the drill bit can drive the camera downward through the bidirectional lead screw and the connecting component, so that the camera can monitor the inside of the crack more fully. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0031] Figure 2 It is a cross-sectional view of the locking assembly of an embodiment of the present application.

[0032] Figure 3 It is a cross-sectional view of the connection relationship between the measuring block located in the middle position and the connecting component of an embodiment of the present application.

[0033] Figure 4 It is a cross-sectional view of the connection relationship between one of the measuring blocks located on both sides and the connecting assembly in an embodiment of the present application.

[0034] Explanation of the accompanying drawings: 1. fixed plate; 11. slide groove; 2. measuring block; 3. camera; 4. ultrasonic transceiver probe; 5. locking assembly; 51. first sleeve; 52. second sleeve; 53. third sleeve; 54. locking motor; 55. drill bit; 551. drill tip; 552. connecting rod; 553. pressure block; 554. airbag; 555. push plate; 556. locking needle; 56. locking electric push rod; 57. tension spring; 6. spatial positioning sensor; 7. displacement assembly; 71. connecting block; 72. bidirectional screw; 73. connecting rope; 8. connecting assembly; 81. connecting rod; 82. connecting screw; 83. driving bevel gear; 84. driven bevel gear; 85. driving gear; 86. driven gear; 87. connecting gear; 88. connecting rack. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1 -Attached Figure 4 This application is described in further detail.

[0036] The present application discloses a geological disaster crack measurement device, referring to Figure 1, comprising a fixed plate 1, the fixed plate 1 is connected with a plurality of measuring blocks 2. In this embodiment, the number of measuring blocks 2 is five, and the five measuring blocks 2 are evenly distributed on the fixed plate 1. A slide groove 11 is provided in the middle of the fixed plate 1, penetrating the fixed plate 1 and extending along the length direction of the fixed plate 1. The vertical cross section of each measuring block 2 is set to be T-shaped, and the T-shaped vertical edge of each measuring block 2 penetrates the slide groove 11 and slides against the adjacent side wall of the slide groove 11.

[0037] One end of each measuring block 2 that passes through the slide slot 11 is connected to a camera 3 , and an ultrasonic transceiver probe 4 is installed at the lower side of each camera 3 .

[0038] The two opposite side walls of the fixing plate 1 are connected with multiple sets of locking components 5. In this embodiment, the number of locking components 5 connected to each side wall of the fixing plate 1 is five, and the five sets of locking components 5 are arranged in one-to-one correspondence with the five measuring blocks 2 in the initial state. The end of each set of locking components 5 away from the fixing plate 1 can be plugged into the adjacent crack side wall, and the end of each set of locking components 5 plugged into the adjacent crack side wall can move with the crack.

[0039] A spatial positioning sensor 6 is installed on each measuring block 2, and a similar spatial positioning sensor 6 is installed at a position of each locking assembly 5 that can move with the crack.

[0040] During actual use, the fixing plate 1 is placed in the middle position of the crack, and then the ends of each set of locking components 5 are inserted into the adjacent crack side walls. The width, inclination angle and depth of the crack can be detected through multiple spatial positioning sensors 6, multiple cameras 3 and multiple ultrasonic transceiver probes 4.

[0041] When the crack moves, since each group of locking assemblies 5 is located inside the crack, the side walls of the crack can drive the locking assemblies 5 to move during the crack deformation process, and then drive the spatial positioning sensor 6 connected to the locking assemblies 5 to move, thereby realizing the monitoring of the crack deformation.

[0042] Reference Figure 2 The locking assembly 5 includes a first sleeve 51 ball-hinged with the side wall of the fixed plate 1, and each first sleeve 51 is slidably inserted into the end away from the connected fixed plate 1 with a second sleeve 52, and each second sleeve 52 is slidably inserted into the end away from the connected first sleeve 51 with a third sleeve 53.

[0043] Each third sleeve 53 is provided with a locking motor 54 inside, and the output shaft of each locking motor 54 extends away from the end of the connected second sleeve 52. A drill bit 55 is fixedly connected to the output shaft of each locking motor 54, and each drill bit 55 passes through the end of the connected third sleeve 53 away from the fixed plate 1.

[0044] Each second sleeve 52 is fixedly connected with a locking electric push rod 56, and the length direction of each locking electric push rod 56 is arranged parallel to the length direction of the connected second sleeve 52. The output shaft end of each locking electric push rod 56 is fixedly connected to the end side wall of the adjacent third sleeve 53. Each first sleeve 51 is provided with a tension spring 57 that simultaneously connects the inner wall of the first sleeve 51 and the inner wall of the adjacent second sleeve 52, and each tension spring 57 can drive the connected second sleeve 52 to move toward the inside of the adjacent first sleeve 51.

[0045] Each first sleeve 51 is fixedly connected with a spatial positioning sensor 6 , and each third sleeve 53 is also fixedly connected with a spatial positioning sensor 6 .

[0046] After the fixing plate 1 is placed in the middle of the crack, multiple locking electric push rods 56 are started, and the drill bit 55 connected to the locking electric push rods 56 is driven by the locking electric push rods 56 to move toward the direction close to the side wall of the crack. At the same time, the locking motor 54 is started, and the locking motor 54 drives the connected drill bit 55 to drill into the adjacent side wall of the crack, thereby realizing the connection with the adjacent side wall of the crack through the locking component 5. Afterwards, when the side wall of the crack moves or tilts, the displacement of the crack can be known by detecting the spatial position of multiple spatial positioning sensors 6.

[0047] An independent drill tip 551 is provided at the end of each drill bit 55. A connecting rod 552 is fixedly connected to the end of each drill tip 551 close to the adjacent drill bit 55. The cross section of each connecting rod 552 is rectangular. The end of each connecting rod 552 away from the connected drill tip 551 is slidably plugged into the adjacent drill bit 55 and fixedly connected to a pressure block 553. The end of each pressure block 553 away from the connecting rod 552 is abutted against an air bag 554. Push plates 555 are provided on opposite sides of each air bag 554. Each push plate 555 can move toward the side wall of the adjacent drill bit 55 driven by the air bag 554 when the air bag 554 is deformed. A locking pin 556 is fixedly connected to the side of each push plate 555 away from the adjacent air bag 554. A through hole for the locking pin 556 to penetrate the side wall of the drill bit 55 is provided at the position of the side wall of each drill bit 55 close to each locking pin 556.

[0048] During actual use, when the drill bit 55 drills into the adjacent crack side wall driven by the locking motor 54, the locking pin 556 abuts against the side wall of the crack and moves toward the side close to the drill bit 55. During the movement, the locking pin 556 drives the connected connecting rod 552 and the pressure block 553 to move. During the movement, the pressure block 553 squeezes the adjacent airbags 554. While being squeezed, the airbags 554 abut against the push plates 555 on both sides and drive the two abutted push plates 555 to move away from each other, so that the push plates 555 drive the locking pin 556 to move out of the drill bit 55 and plug into the crack side wall, so that the crack can better drive the connected drill bit 55 and the space positioning sensor 6 connected to the drill bit 55 to move during the movement or tilting.

[0049] Reference Figure 3 and Figure 4 The fixed plate 1 is connected to a displacement assembly 7, which is connected to two drill bits 55 located in the middle position and can drive the multiple measuring blocks 2 to move when the connected drill bits 55 move away from the fixed plate 1, thereby increasing the spacing between the multiple measuring blocks 2.

[0050] By setting up the displacement component 7, when the crack increases and drives the drill bit 55 to move, the drill bit 55 increases the distance between the multiple measuring blocks 2 through the displacement component 7, so that the interval detected by the camera 3 connected to the multiple measuring blocks 2 and the ultrasonic transceiver probe 4 is increased, so that the monitoring result is more accurate.

[0051] The displacement assembly 7 includes a connecting block 71 connected to two opposite side walls of each measuring block 2 located inside the slide slot 11, and multiple connecting blocks 71 located on the same side of the slide slot 11 are connected to the same bidirectional lead screw 72. The middle of the bidirectional lead screw 72 is provided with a bare rod, and the connecting block 71 located in the middle is rotatably connected to the middle position of the bidirectional lead screw 72, and the remaining connecting blocks 71 are all penetrated by the bidirectional lead screw 72 and are threadedly connected to the bidirectional lead screw 72.

[0052] One end of each second sleeve 52 located in the middle position close to the fixed plate 1 is fixedly connected to a connecting rope 73, and one end of the connecting rope 73 away from the connected second sleeve 52 is fixedly connected to the middle position of the adjacent bidirectional screw 72 and is wound around the bidirectional screw 72.

[0053] When the side wall of the crack drives the drill bit 55 to move, the drill bit 55 drives the third sleeve 53 and the second sleeve 52 to move. During the movement of the second sleeve 52, the connected bidirectional lead screw 72 is driven to rotate through the connecting rope 73. During the rotation, the bidirectional lead screw 72 drives the four threaded measuring blocks 2 to move away from the middle measuring block 2, thereby realizing the process of increasing the intervals between the multiple measuring blocks 2 through the drill bit 55 when the crack expands.

[0054] A connecting assembly 8 is connected between the multiple measuring blocks 2 and the multiple cameras 3 connected thereto. The connecting assembly 8 is also connected to the bidirectional lead screw 72 and can drive the cameras 3 to move downwards under the drive of the bidirectional lead screw 72 .

[0055] By setting the connecting component 8, when the distance between the multiple measuring blocks 2 increases, the bidirectional screw 72 can also drive the camera and the ultrasonic transceiver probe 4 to move downward, so that the camera 3 and the ultrasonic transceiver probe 4 can more fully monitor the inside of the enlarged crack.

[0056] The connecting assembly 8 includes a connecting rod 81 fixedly connected to the upper end of each camera 3, the cross section of the connecting rod 81 is set to be rectangular, and the upper end of the connecting rod 81 passes through the bottom side wall of the connected measuring block 2 and is slidably connected to the bottom side wall of the measuring block 2. One end of each connecting rod 81 inserted into the inside of the measuring block 2 is fixedly connected to a connecting screw 82.

[0057] A driving bevel gear 83 is fixedly sleeved at the middle position of each bidirectional lead screw 72, each driving bevel gear 83 is meshed with a driven bevel gear 84, one side of each driven bevel gear 84 is fixedly connected to a driving gear 85, and the opposite sides of the two driving gears 85 are meshed with the same driven gear 86, and the driven gear 86 is threadedly sleeved to the external setting of the adjacent connecting lead screw 82.

[0058] The remaining four connecting screws 82 that are not connected to the driven gears 86 are all threadedly sleeved with connecting gears 87, and each connecting gear 87 passes through one of the side walls of the measuring block 2 and is meshed with a connecting rack 88, and the connecting rack 88 is fixedly connected to the adjacent fixed plate 1.

[0059] During the rotation of the bidirectional lead screw 72, the bidirectional lead screw 72 drives the driving bevel gear 83 to rotate, and the driving bevel gear 83 drives the driven bevel gear 84 to rotate during the rotation, and the driven bevel gear 84 drives the driving gear 85 to rotate during the rotation, and the driving gear 85 drives the driven gear 86 to rotate during the rotation, and the driven gear 86 drives the connected connecting lead screw 82 to move downward, and the connecting lead screw 82 drives the connected connecting rod 81 and the camera 3 to move downward.

[0060] In the process of the bidirectional lead screw 72 driving the measuring block 2 to move, since the connecting gear 87 is meshed with the connecting rack 88, the measuring block 2 drives the connected connecting gear 87 to rotate during the movement, and the connecting gear 87 drives the connecting lead screw 82 to move downward during the rotation, and the connecting lead screw 82 drives the connected connecting rod 81 and the camera 3 to move downward during the downward movement.

[0061] The implementation principle of a geological disaster crack measuring device in an embodiment of the present application is: when it is necessary to detect the crack, the fixed plate 1 is placed in the middle position of the crack, and then multiple locking electric push rods 56 and multiple locking motors 54 are started, so that multiple drill bits 55 can be inserted into adjacent crack side walls.

[0062] When the crack becomes larger, the side wall of the crack drives the drill bit 55 to move, and during the movement of the drill bit 55, the plurality of spatial positioning sensors 6 are driven to move so as to monitor the shape and width of the crack.

[0063] The drill bit 55 drives the multiple measuring blocks 2 to move during the movement, and drives the multiple cameras 3 and the ultrasonic transceiver probe 4 to move downward, thereby realizing the detection of the internal conditions of the crack.

[0064] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A geological disaster crack measurement device, characterized in that: The invention comprises a fixed plate (1), a plurality of measuring blocks (2) are connected to the fixed plate (1), the lower side of each measuring block (2) passes through the fixed plate (1) and is slidably connected to the fixed plate (1), a camera (3) is installed at one end of each measuring block (2) passing through the fixed plate (1), a plurality of locking components (5) are rotatably connected to two opposite side walls of the fixed plate (1), one end of each locking component (5) away from the side wall of the connected fixed plate (1) can be inserted into the crack and move with the crack, a spatial positioning sensor (6) is installed on the locking component (5), and the spatial positioning sensor (6) can move with the end of the locking component (5) and the adjacent crack, and each measuring block (2) is connected to the spatial positioning sensor (6); the fixed plate (1) is connected to a displacement component (7) for driving the plurality of measuring blocks (2) to move; Each of the locking assemblies (5) comprises a first sleeve (51) with one end ball-jointed to the fixing plate (1); each of the first sleeves (51) is slidably plugged with a second sleeve (52) at one end away from the fixing plate (1) to which it is connected; each of the second sleeves (52) is slidably plugged with a third sleeve (53) at one end away from the fixing plate (1); each of the third sleeves (53) is internally fixed with a locking motor (54); the output shaft of each locking motor (54) extends to a side away from the side wall of the fixing plate (1) to which it is connected and is fixedly connected with a drill bit (55); each of the second sleeves (52) is internally connected with a locking electric push rod (56) capable of driving the third sleeve (53) to move; The first sleeve (51) is internally connected with a tension spring (57) capable of driving the second sleeve (52) to move toward a side close to the fixed plate (1) connected thereto; The end of the drill bit (55) is provided with a drill tip (551), and one end of the drill tip (551) close to the drill bit (55) is fixedly connected to a pressure block (553) slidably inserted into the inside of the drill bit (55), one side of the pressure block (553) is abutted with an air bag (554), and both sides of the air bag (554) are abutted with push plates (555), and each of the push plates (555) can move towards the direction close to the side wall of the adjacent drill bit (55) under the drive of the air bag (554) when the air bag (554) is squeezed and deformed, and each of the push plates (555) is fixedly connected to a locking pin (556) at one end of which can penetrate the side wall of the drill bit (55) on the side away from the air bag (554); The displacement assembly (7) comprises a connection block (71) fixedly connected to each of the measuring blocks (2); a plurality of the connection blocks (71) located on the same side of the fixing plate (1) are penetrated by and connected to the same bidirectional lead screw (72); the connection block (71) located in the middle is rotatably connected to the bidirectional lead screw (72) to which it is connected, and the remaining connection blocks (71) are all threadedly connected to the bidirectional lead screw (72); The second sleeve (52) near the middle position of the fixing plate (1) is fixedly connected to a connecting rope (73) on one side near the fixing plate (1); one end of the connecting rope (73) away from the connected second sleeve (52) is wound around the middle position of the adjacent bidirectional lead screw (72) and can drive the bidirectional lead screw (72) to rotate.

2. A geological disaster crack measurement device according to claim 1, characterized in that: A connecting assembly (8) is connected between the bidirectional lead screw (72) and the camera (3), and the connecting assembly (8) can drive the plurality of cameras (3) to move during the rotation of the bidirectional lead screw (72).

3. A geological disaster crack measurement device according to claim 2, characterized in that: The connecting assembly (8) comprises a connecting rod (81) connected to each of the cameras (3). The upper end of each of the connecting rods (81) slides through the adjacent measuring block (2) and is fixedly connected to a connecting lead screw (82). The connecting lead screw (82) located in the middle position is threadedly sleeved with a driving gear (85) on its outer side. A driven gear (86) is meshed on one side of the driving gear (85). The driven gear (86) is fixedly connected to a driven bevel gear (84). A driving bevel gear (83) is meshed on one side of the driven bevel gear (84). The driving bevel gear (83) is fixedly sleeved to the outside of the bidirectional lead screw (72). The outer sides of the remaining connecting lead screws (82) are threadedly sleeved with connecting gears (87). Each of the connecting gears (87) is meshed with a connecting rack (88) on one side. The connecting rack (88) is fixedly connected to the adjacent fixing plate (1).

4. A geological disaster crack measurement device according to claim 1, characterized in that: An ultrasonic transceiver probe (4) is installed on the lower side of each camera (3).

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