A crack measurement device for geological disaster monitoring

Abstract

The present invention relates to the technical field of geological disaster monitoring, and specifically to a crack measurement device for geological disaster monitoring, which includes a fixed plate, a moving unit, a measurement unit, and a guiding unit. In the present invention, through the centering group, the two ultrasonic probes are respectively located at equidistant positions on both sides of the crack, and through the moving group, the moving distance of the two ultrasonic probes is equal each time, avoiding the problem of reduced measurement accuracy caused by unequal moving distances of the two ultrasonic probes. Secondly, through the cooperation between the push rod in the pushing group and the fifth spring, after the push plate pushes one of the two ultrasonic probes to contact the side wall, the other ultrasonic probe continues to move towards the side wall, and the moving distance is compensated by the fifth spring, so that the pushing group pushes both ultrasonic probes to closely adhere to the concrete side wall, avoiding the problem that the two ultrasonic probes cannot simultaneously closely adhere to the concrete side wall due to the non-coplanarity of the planes on both sides of the crack, thereby increasing the measurement error.

Description

Technical Field

[0001] The present invention relates to the technical field of geological disaster monitoring, and specifically to a crack measurement device for geological disaster monitoring. Background Art

[0002] After a geological disaster occurs, it is very important to measure the depth of cracks in damaged buildings and infrastructure. These measurement results are used for the safety assessment and structural stability assessment of buildings. Currently, ultrasonic probes are usually used to measure the depth of cracks in concrete buildings. During the measurement of the crack depth using an ultrasonic probe, the flat measurement method is required. The flat measurement method utilizes the propagation characteristics of ultrasonic waves in concrete and the influence of cracks on ultrasonic signals. When ultrasonic waves propagate in homogeneous concrete, their speed and path are predictable. However, when ultrasonic waves encounter a crack, the air in the crack has a different acoustic impedance compared to concrete, which will cause the ultrasonic waves to be reflected and refracted at the crack, thereby affecting the propagation time, intensity, and path of the ultrasonic waves.

[0003] During the existing measurement of the crack depth on the side wall, it is necessary for the staff to mark lines on the crack-free areas of the concrete on both sides of the crack. Then, the staff holds ultrasonic probes coated with coupling agents and places the two ultrasonic probes on the marked positions on both sides of the crack respectively. After measuring a set of data, the two ultrasonic probes are moved synchronously on both sides of the crack, and the moving distances of the two ultrasonic probes on both sides of the crack relative to the crack are made equal. After multiple moving measurements at the same height, it is necessary to re-mark lines on the concrete at different height positions on both sides of the crack, and then repeat the measurements multiple times. The depth of the crack is inferred from the collected data.

[0004] The following deficiencies exist in the above process of measuring the crack depth on the side wall: In the method of holding and placing the two ultrasonic probes by the staff, it is easy for the moving distances of the two ultrasonic probes on both sides of the crack relative to the crack to be unequal, resulting in the placement positions of the two ultrasonic probes on both sides of the crack deviating from the marked positions on the concrete, thereby reducing the accuracy of the measurement results. Secondly, it is necessary to mark lines on the concrete on both sides of the crack before each measurement, and the overall operation is rather cumbersome. Summary of the Invention

[0005] Based on this, it is necessary to provide a crack measurement device for geological disaster monitoring, aiming to solve the above technical problems.

[0006] This application provides a crack measurement device for geological disaster monitoring, including: a fixed plate, a push plate is fixedly arranged on the left end face of the fixed plate, two sliding columns symmetrically distributed up and down penetrate through the push plate in a sliding manner, a support plate is fixedly arranged on the common left end faces of the two sliding columns, a first spring sleeved on the sliding columns is fixedly arranged between the support plate and the push plate, a sliding groove is formed on the support plate, a sliding plate is slidably arranged up and down in the sliding groove, the sliding plate is driven to move up and down by an electric slider, a sliding block is slidably arranged left and right on the sliding plate, two placing plates symmetrically distributed up and down are fixedly arranged on the left end face of the sliding block through vertical bars, and a pressing plate is fixedly arranged on the common left end faces of the two placing plates.

[0007] A moving unit is arranged on the right end face of the fixed plate, the moving unit is an existing moving device including driving wheels, a measuring unit is jointly arranged on the pressing plate and the sliding plate, the measuring unit includes a sliding groove, two sliding grooves symmetrically distributed front and back are formed through the pressing plate, a sliding strip is slidably arranged in the sliding groove, a push rod penetrates through the sliding strip in a sliding manner, ultrasonic probes are fixedly arranged on the common left end faces of the two push rods, a moving group is jointly arranged between the two sliding strips, a limiting group for limiting the sliding strip is arranged on the right end face of the pressing plate, and a pushing group is arranged on the sliding plate.

[0008] A guiding unit is arranged on the left end face of the pressing plate, the guiding unit includes a fixed rod, the fixed rod is fixedly arranged on the left end face of the pressing plate, a rectangular plate is slidably arranged on the left end face of the fixed rod through a rectangular block, a guiding group for guiding the movement of the pressing plate is arranged on the rectangular plate, and a centering group for adjusting the left and right positions of the ultrasonic probe is arranged on the fixed rod.

[0009] According to an advantageous embodiment, the guiding group includes rectangular grooves, four rectangular grooves are formed on the rectangular plate, a support bar is hinged in the rectangular groove through a rotating column, a torsion spring sleeved on the rotating column is fixedly arranged between the support bar and the inner wall of the corresponding rectangular groove, and a first roller is rotatably arranged on the side of the support bar away from the rectangular plate through a rotating rod.

[0010] According to an advantageous embodiment, the centering group includes a fixed block, a fixed block is fixedly sleeved on the fixed rod between the rectangular plate and the pressing plate, vertical rods are fixedly arranged on the upper and lower end faces of the fixed block, a horizontal bar is slidably sleeved on the vertical rod, a second spring sleeved on the vertical rod is fixedly arranged between the horizontal bar and the fixed block, two symmetrically distributed connecting bars are hinged on the horizontal bar, a horizontal rod is jointly hinged on the two relatively upper and lower connecting bars, and a second roller is rotatably sleeved on a section of the horizontal rod close to the rectangular plate.

[0011] According to an advantageous embodiment, two symmetrically arranged front and rear moving grooves are formed on the opposite surfaces of the two placement plates. The moving grooves are in the shape of right triangles, and the inclined sections of the two moving grooves on the same placement plate face the front and rear sides respectively. The inclined sections of the two relatively front and rear moving grooves approach each other from left to right. The lower inner wall of the moving groove is provided with three inclined surfaces, and the moving groove is divided into a horizontal section, an inclined section, and a vertical section by the three inclined surfaces. A U-shaped strip with an opening facing the right is slidably arranged in the moving groove through a vertical column. A connecting plate is fixedly arranged on the placement plate within the opening area of the U-shaped strip. A connecting rod slidably penetrates through the connecting plate. The connecting rod is slidably connected to the U-shaped strip through a first moving block. A third spring sleeved on the corresponding connecting rod is fixedly arranged between the first moving block and the rectangular plate. Moving strips are slidably arranged on the opposite surfaces of the two placement plates, and the moving strips are located between the two U-shaped strips. Second moving blocks are slidably arranged on the opposite surfaces of the left and right relatively arranged U-shaped strips. A pushing strip is jointly hinged between the second moving block and the corresponding moving strip.

[0012] According to an advantageous embodiment, the pushing group includes a pushing column. Two symmetrically distributed front and rear pushing columns slidably penetrate through the sliding plate. A first circular plate is fixedly arranged on the right end surface of the pushing column. A fourth spring sleeved on the corresponding pushing column is fixedly arranged between the first circular plate and the sliding plate. A transverse plate is fixedly arranged on the left end surface of the pushing column. A third moving block is slidably arranged on the transverse plate. The third moving block is slidably sleeved on the pushing rod. A second circular plate is fixedly sleeved on the pushing rod on the left side of the transverse plate. A fifth spring sleeved on the corresponding pushing rod is fixedly arranged between the second circular plate and the corresponding third moving block.

[0013] According to an advantageous embodiment, the moving group includes a transmission shaft. A transmission shaft is rotatably arranged on the right end surface of the pressing plate. A gear is fixedly sleeved on the transmission shaft. A rack meshing with the gear is fixedly arranged on the sliding strip through a connecting block. A T-shaped plate is fixedly arranged on the front end surface of the front sliding strip.

[0014] According to an advantageous embodiment, the limiting group includes a placement groove. A plurality of equidistantly distributed placement grooves are formed on the right end surface of the pressing plate, and the placement grooves communicate with the rear sliding grooves. A positioning strip is slidably arranged in the placement groove. The positioning strip is sequentially divided into an isosceles triangle section and a strip section from top to bottom. A sixth spring is fixedly arranged between the positioning strip and the lower inner wall of the placement groove. A pushing groove is formed in the strip section of the positioning strip, and the pushing groove is a right trapezoid with an inclined surface facing upward, and the inclined surface of the pushing groove slopes upward from left to right. A plurality of transmission rods are fixedly arranged on the left end surface of the rear transverse plate, and the transmission rods correspond to the placement grooves one by one. A plurality of through holes corresponding to the transmission rods are formed in the pressing plate.

[0015] According to a preferred embodiment, a plurality of equidistantly distributed positioning grooves are formed on the inner walls of the front and rear sides of the chute. A plurality of cylindrical grooves are formed on the front and rear sides of the sliding plate. A positioning post is slidably arranged in the cylindrical groove, and the end surface of the positioning post close to the positioning groove is a spherical surface. A seventh spring is fixedly arranged between the positioning post and the inner wall of the cylindrical groove.

[0016] In summary, the present invention includes at least one of the following beneficial effects: First, in the present invention, the centering group makes the two ultrasonic probes respectively located at equal distances on both sides of the crack, and the moving group makes the moving distance of the two ultrasonic probes equal each time, avoiding the problem of reduced measurement accuracy caused by unequal moving distances of the two ultrasonic probes, and simplifying the operation steps of crack depth measurement. Secondly, the pushing group pushes the two ultrasonic probes to closely adhere to the side wall, avoiding the problem that the two ultrasonic probes cannot simultaneously adhere to the concrete side wall due to the non-coplanarity of the two planes on both sides of the crack, resulting in an increase in measurement error.

[0017] Second, in the present invention, the left and right positions of the measuring unit are adjusted through the cooperation between the two rollers II in the centering group, so that the two ultrasonic probes are always located on both sides of the crack, and the distances from the two ultrasonic probes to the crack are equal. Then, through the cooperation between the moving group and the limiting group, the two ultrasonic probes move equidistantly, avoiding the problem of reduced measurement accuracy caused by unequal moving distances of the two ultrasonic probes.

[0018] Third, in the present invention, through the cooperation between the push rod and the fifth spring in the pushing group, after the push plate pushes one of the two ultrasonic probes to contact the side wall, the other ultrasonic probe continues to move towards the side wall, and the moving distance is compensated by the fifth spring, so that the pushing group pushes the two ultrasonic probes to closely adhere to the concrete side wall, avoiding the problem that the two ultrasonic probes cannot simultaneously adhere to the concrete side wall due to the non-coplanarity of the two planes on both sides of the crack, resulting in an increase in measurement error. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 The front view of a crack measuring device for geological disaster monitoring provided according to an embodiment of the present invention is shown.

[0021] Figure 2 The left view of the guiding unit provided according to an embodiment of the present invention is shown.

[0022] Figure 3 A partial cross-sectional view of the three-dimensional structure of the support plate, guide group, and rectangular plate provided according to an embodiment of the present invention is shown.

[0023] Figure 4 Shown is provided according to an embodiment of the present invention Figure 3 An enlarged view of the structure at A in

[0024] Figure 5 A schematic diagram of the three-dimensional structure of the pressing plate, transverse plate, and limiting group provided according to an embodiment of the present invention is shown.

[0025] Figure 6 A schematic diagram of the three-dimensional structure of the U-shaped bar, rectangular plate, and vertical rod provided according to an embodiment of the present invention is shown.

[0026] Figure 7 A partial cross-sectional view of the three-dimensional structure of the placement plate, rectangular plate, and connecting bar provided according to an embodiment of the present invention is shown.

[0027] Figure 8 A partial cross-sectional view of the three-dimensional structure of the push column, vertical rod, and pressing plate provided according to an embodiment of the present invention is shown.

[0028] Figure 9 A partial cross-sectional view of the three-dimensional structure of the moving groove, U-shaped bar, and connecting rod provided according to an embodiment of the present invention is shown.

[0029] Among them, the above-mentioned drawings include the following reference numerals:

[0030] 1. Fixed plate; 10. Pushing plate; 100. Sliding column; 101. First spring; 11. Bracket plate; 110. Sliding groove; 111. Sliding plate; 112. Sliding block; 113. Placing plate; 114. Tightening plate; 2. Moving unit; 3. Measuring unit; 30. Sliding groove; 31. Sliding bar; 32. Pushing rod; 33. Moving group; 330. Transmission shaft; 331. Gear; 332. Rack; 333. T-shaped plate; 34. Limiting group; 340. Positioning bar; 341. Sixth spring; 342. Pushing groove; 343. Transmission rod; 35. Pushing group; 350. Pushing column; 351. Fourth spring; 352. Horizontal plate; 353. Third moving block; 354. Fifth spring; 36. Positioning groove; 360. Positioning column; 361. Seventh spring; 4. Guiding unit; 40. Fixed rod; 41. Rectangular plate; 42. Guiding group; 420. Supporting bar; 421. Torsion spring; 422. First roller; 423. Rectangular groove; 43. Centering group; 430. Fixed block; 431. Vertical rod; 432. Horizontal bar; 433. Second spring; 434. Horizontal rod; 435. Second roller; 436. Connecting bar; 44. Moving groove; 440. U-shaped bar; 441. Connecting rod; 442. First moving block; 443. Third spring; 444. Moving bar; 445. Second moving block; 446. Horizontal section; 447. Inclined section; 448. Longitudinal section. Detailed implementation manners

[0031] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] Such as Figure 1 , Figure 2 , Figure 3 and Figure 5As shown in the figure, a crack measurement device for geological disaster monitoring includes: a fixed plate 1. A push plate 10 is fixedly arranged on the left end face of the fixed plate 1. Two sliding columns 100 which are symmetrically distributed up and down penetrate through the push plate 10 in a sliding manner. A support plate 11 is fixedly arranged on the common left end faces of the two sliding columns 100. A first spring 101 sleeved on the sliding columns 100 is fixedly arranged between the support plate 11 and the push plate 10. A sliding groove 110 is formed in the support plate 11. A sliding plate 111 is arranged to slide up and down in the sliding groove 110. The sliding plate 111 is driven to move up and down by an electric slider. A sliding block 112 is arranged to slide left and right on the sliding plate 111. The left end face of the sliding block 112 is fixedly provided with two placing plates 113 which are symmetrically distributed up and down through a vertical bar. A pressing plate 114 is fixedly arranged on the common left end faces of the two placing plates 113.

[0033] As Figure 1 , Figure 3 and Figure 5 shown, a moving unit 2 is arranged on the right end face of the fixed plate 1. The moving unit 2 is an existing moving device including a driving wheel. A measuring unit 3 is jointly arranged on the pressing plate 114 and the sliding plate 111. The measuring unit 3 includes a sliding groove 30. Two sliding grooves 30 which are symmetrically distributed front and back are formed through the pressing plate 114. A sliding bar 31 is arranged to slide in the sliding groove 30. A push rod 32 penetrates through the sliding bar 31 in a sliding manner. Ultrasonic probes are fixedly arranged on the left end faces of the two push rods 32. A moving group 33 is jointly arranged between the two sliding bars 31. A limiting group 34 for limiting the sliding bar 31 is arranged on the right end face of the pressing plate 114. A pushing group 35 is arranged on the sliding plate 111.

[0034] As Figure 2 , Figure 3 and Figure 6 shown, a guiding unit 4 is arranged on the left end face of the pressing plate 114. The guiding unit 4 includes a fixed rod 40. The fixed rod 40 is fixedly arranged on the left end face of the pressing plate 114. A rectangular plate 41 is arranged to slide on the left end face of the fixed rod 40 through a rectangular block. A guiding group 42 for guiding the movement of the pressing plate 114 is arranged on the rectangular plate 41. A centering group 43 for adjusting the left and right positions of the ultrasonic probe is arranged on the fixed rod 40.

[0035] During operation, the moving unit 2 pushes the push plate 10 to move leftward through the fixed plate 1. The push plate 10 drives the support plate 11 to move synchronously through the first spring 101. The support plate 11 drives the placement plate 113 to move synchronously through the sliding plate 111. The placement plate 113 drives the guiding unit 4 to move leftward synchronously through the pressing plate 114 until the guiding unit 4 extends into the crack on the side wall. The centering group 43 works to adjust the position of the pressing plate 114 in the left-right direction, so that the crack is located exactly in the middle between the two ultrasonic probes. After that, the moving unit 2 continues to push the push plate 10 to move leftward. The continuous movement of the push plate 10 causes the pushing group 35 to work. The pushing group 35 pushes the two ultrasonic probes coated with coupling agent to move leftward until they are in close contact with the concrete side wall. After the measurement is completed, the moving unit 2 moves backward until both ultrasonic probes are disengaged from the side wall. Then the moving group 33 works to push the two ultrasonic probes away from each other, and the limiting group 34 limits the positions of the two ultrasonic probes. After that, the moving unit 2 continues to push the two ultrasonic probes against the side wall. Then the above steps are repeated to perform multiple measurements on both sides of the crack. After the measurement of the crack at the same horizontal position is completed, the moving unit 2 moves backward. The electric slider works to push the sliding plate 111 to move downward, and at the same time the guiding group 42 works to drive the centering group 43 to move downward along the crack. Then the above steps are repeated to measure the depth of the crack.

[0036] As Figure 3 , Figure 6 and Figure 8 shown, the guiding group 42 includes a rectangular groove 423. Four rectangular grooves 423 are formed on the rectangular plate 41. A support bar 420 is hinged in the rectangular groove 423 through a rotating column. A torsion spring 421 sleeved on the rotating column is fixedly arranged between the support bar 420 and the inner wall of the corresponding rectangular groove 423. A first roller 422 is rotatably arranged on the side of the support bar 420 away from the rectangular plate 41 through a rotating rod.

[0037] As Figure 3 , Figure 6 and Figure 8 shown, the centering group 43 includes a fixed block 430. A fixed block 430 is fixedly sleeved on the fixed rod 40 and is located between the rectangular plate 41 and the pressing plate 114. Vertical rods 431 are fixedly arranged on the upper and lower end faces of the fixed block 430. A horizontal bar 432 is slidably sleeved on the vertical rods 431. A second spring 433 sleeved on the vertical rods 431 is fixedly arranged between the horizontal bar 432 and the fixed block 430. Two symmetric connecting bars 436 are hinged on the horizontal bar 432. A horizontal rod 434 is jointly hinged on the two vertically opposite connecting bars 436. A second roller 435 is rotatably sleeved on a section of the horizontal rod 434 close to the rectangular plate 41.

[0038] As Figure 3 andFigure 9 As shown, on the opposite sides of the two placement plates 113, two symmetrically arranged front and rear moving slots 44 are provided. The shape of the moving slot 44 is a right triangle. On the same placement plate 113, the inclined sections of the two moving slots 44 face the front and rear sides respectively, and the inclined sections of the front and rear opposite moving slots 44 approach each other from left to right. The lower inner wall of the moving slot 44 is provided with three inclined surfaces, and the moving slot 44 is divided into a horizontal section 446, an inclined section 447, and a vertical section 448 by the three inclined surfaces. A U-shaped strip 440 with an opening facing the right is slidably arranged in the moving slot 44 through a vertical column. A connecting plate is fixedly arranged on the placement plate 113 within the opening area of the U-shaped strip 440. A connecting rod 441 is slidably penetrated through the connecting plate. The connecting rod 441 is slidably connected to the U-shaped strip 440 through a first moving block 442. A third spring 443 sleeved on the corresponding connecting rod 441 is fixedly arranged between the first moving block 442 and the rectangular plate 41. Moving strips 444 are slidably arranged on the opposite sides of the two placement plates 113, and the moving strips 444 are located between the two U-shaped strips 440. Second moving blocks 445 are slidably arranged on the opposite surfaces of the left and right opposite U-shaped strips 440. A pushing strip is jointly hinged between the second moving block 445 and the corresponding moving strip 444.

[0039] In the initial state, the vertical column is located in the horizontal section 446 of the moving slot 44, and the U-shaped strip 440 abuts against the corresponding support strip 420 and connecting strip 436, so that the corresponding torsion spring 421 and second spring 433 are both stretched and deformed (see Figure 7 ). During operation, the moving unit 2 pushes the pushing plate 10 to move leftward through the fixing plate 1. The pushing plate 10 pushes the support plate 11 to move synchronously through the first spring 101. The support plate 11 drives the placement plate 113 to move synchronously through the sliding plate 111. The U-shaped strip 440 moves leftward synchronously with the placement plate 113. After the U-shaped strip 440 contacts the concrete side walls on both sides of the crack, the U-shaped strip 440 stops moving relative to the concrete side walls on both sides of the crack while the placement plate 113 and the abutting plate 114 continue to move leftward. The third spring 443 is compressed and deformed. The abutting plate 114 drives the guiding group 42 and the centering group 43 to continue to move. After the support strip 420 moves to be separated from contact with the U-shaped strip 440, the elastic force generated by the deformation of the torsion spring 421 pushes the support strip 420 to rotate. The support strip 420 stops rotating after the first roller 422 contacts the inner wall of the crack.

[0040] The placement plate 113 continues to move leftward until the U-shaped strips 440 are all separated from contact with the corresponding connecting strips 436 (see Figure 6) The elastic force generated by the deformation of the second spring 433 pulls the horizontal bar 432 to move closer to the fixed block 430 in the direction approaching the horizontal bar 432, causing the connecting bar 436 to push the horizontal rods 434 away from each other. The horizontal rods 434 drive the second rollers 435 to move synchronously until the second rollers 435 stop moving after contacting the inner wall of the crack. The position of the fixed rod 40 is centered through the cooperation between the two second rollers 435, so that the fixed rod 40 is located in the exact middle of the crack, and the fixed rod 40 drives the pressing plate 114 and the measuring unit 3 provided on the pressing plate 114 to move synchronously, so that the two ultrasonic probes are respectively located on both sides of the crack, and the distances between the two ultrasonic probes and the crack are equal. Then the placement plate 113 continues to move to the left until the vertical column moves into the inclined section 447 of the moving groove 44.

[0041] During the subsequent reset process, the moving unit 2 moves backward, causing the sliding plate 111 to drive the placement plate 113 to move backward. During the backward movement of the placement plate 113, the elastic force generated by the deformation of the third spring 443 acts on the U-shaped bar 440, causing the U-shaped bar 440 to move leftward relative to the placement plate 113. Through the cooperation between the vertical column and the inclined section 447 of the moving groove 44, the two U-shaped bars 440 on the same placement plate 113 move and move away from each other simultaneously until the U-shaped bar 440 drives the vertical column to move into the longitudinal section 448 of the moving groove 44.

[0042] As Figure 3 、 Figure 5 and Figure 9 shown, the pushing group 35 includes a pushing column 350. Two pushing columns 350 symmetrically distributed front and back penetrate through the sliding plate 111. A circular plate one is fixedly arranged on the right end face of the pushing column 350. A spring four 351 sleeved on the corresponding pushing column 350 is fixedly arranged between the circular plate one and the sliding plate 111. A transverse plate 352 is fixedly arranged on the left end face of the pushing column 350. A moving block three 353 is slidably arranged on the transverse plate 352. The moving block three 353 is slidably sleeved on the pushing rod 32. A circular plate two is fixedly sleeved on the pushing rod 32 on the left side of the transverse plate 352. A spring five 354 sleeved on the corresponding pushing rod 32 is fixedly arranged between the circular plate two and the corresponding moving block three 353.

[0043] As Figure 3 and Figure 5 shown, the moving group 33 includes a transmission shaft 330. A transmission shaft 330 is rotatably arranged on the right end face of the pressing plate 114. The transmission shaft 330 is connected to the motor. A gear 331 is fixedly sleeved on the transmission shaft 330. A rack 332 meshing with the gear 331 is fixedly arranged on the sliding bar 31 through a connecting block. A T-shaped plate 333 is fixedly arranged on the front end face of the front sliding bar 31.

[0044] AsFigure 3 and Figure 8 As shown in Figure 8 , the limiting group 34 includes a placement groove. A plurality of equidistantly distributed placement grooves are formed in the right end face of the pressing plate 114, and the placement grooves communicate with the rear sliding groove 30. A positioning strip 340 is slidably arranged in the placement groove. The positioning strip 340 is sequentially divided into an isosceles triangle section and a strip section from top to bottom. A sixth spring 341 is fixedly arranged between the positioning strip 340 and the lower inner wall of the placement groove. A pushing groove 342 is formed in the strip section of the positioning strip 340, and the pushing groove 342 is a right trapezoid with an inclined surface facing upward, and the inclined surface of the pushing groove 342 slopes upward from left to right. A plurality of transmission rods 343 are fixedly arranged on the left end face of the rear transverse plate 352, and the transmission rods 343 correspond to the placement grooves one by one. A plurality of through holes corresponding to the transmission rods 343 are formed in the pressing plate 114.

[0045] During operation, after the centering group 43 completes the guiding and limiting of the two ultrasonic probes, the moving unit 2 continues to push the push plate 10 to move leftward through the fixing plate 1. The first spring 101 is continuously compressed and deformed until the push plate 10 moves to contact the first circular plate. The push plate 10 pushes the push column 350 to move leftward through the first circular plate. The fourth spring 351 is compressed and deformed. The push column 350 pushes the third moving block 353 to move leftward synchronously through the transverse plate 352. The third moving block 353 drives the push rod 32 to move leftward through the fifth spring 354. The push rod 32 drives the two ultrasonic probes to move leftward. After one of the two ultrasonic probes contacts the side wall, the corresponding fifth spring 354 is continuously compressed and deformed until both ultrasonic probes are tightly attached to the side wall. After measuring the data, the moving unit 2 moves backward until both ultrasonic probes move to disengage from the side wall.

[0046] After both ultrasonic probes are moved to be disengaged from contact with the side wall, the external motor operates to drive the gear 331 to rotate through the transmission shaft 330. Due to the meshing between the gear 331 and the rack 332, the two racks 332 move away from each other. After the sliding bar 31 moves to contact the isosceles triangle section of the corresponding positioning bar 340, through the cooperation between the sliding bar 31 and the inclined surface of the isosceles triangle section of the positioning bar 340, the positioning bar 340 is pushed downward into the positioning groove 36, and the spring six 341 is compressed and deformed. After the sliding bar 31 moves between two adjacent positioning bars 340, it stops moving. The compressed and deformed spring six 341 pushes the corresponding positioning bar 340 to move upward and reset. Then, the moving unit 2 moves to the right, and the rear lateral plate 352 moves to the left, driving the transmission rod 343 to move to the left synchronously. After the transmission rod 343 moves to contact the inclined surface of the pushing groove 342, through the cooperation between the transmission rod 343 and the inclined surface of the pushing groove 342, the transmission rod 343 pushes the positioning bar 340 to move upward, and the spring six 341 is stretched and deformed. When the positioning bar 340 moves to make the bar-shaped section contact the sliding bar 31, the positioning bars 340 on both sides of the sliding bar 31 limit the position of the sliding bar 31, preventing the sliding bar 31 from moving during the process of pushing the two ultrasonic probes to closely adhere to the side wall.

[0047] After the measurement is completed, during the backward movement of the moving unit 2, after the rear lateral plate 352 drives the transmission rod 343 to move to the right and be disengaged from contact with the pushing groove 342, the elastic force generated by the deformation of the spring six 341 pulls the corresponding positioning bar 340 to move downward and reset. Then, the above steps are repeated to perform multiple measurements on the same horizontal height on both sides of the crack.

[0048] As Figure 3 and Figure 4 As shown, a plurality of equally spaced positioning grooves 36 are provided on the front and rear inner walls of the sliding groove 110. A plurality of cylindrical grooves are provided on the front and rear sides of the sliding plate 111. A positioning column 360 is slidably arranged in the cylindrical groove, and the end surface of the positioning column 360 close to the positioning groove 36 is a spherical surface. A spring seven 361 is fixedly arranged between the positioning column 360 and the inner wall of the cylindrical groove.

[0049] In the initial state, the positioning post 360 is located in the positioning groove 36, and the seventh spring 361 is compressed and deformed. The elastic force generated by the deformation of the seventh spring 361 pushes the positioning post 360 against the positioning groove 36, and the position of the sliding plate 111 is limited through the cooperation between the positioning groove 36 and the positioning post 360. Since the end face of the cooperation between the positioning post 360 and the positioning groove 36 is an arc surface, when the electric slider works to push the sliding plate 111 to move downward subsequently, the positioning post 360 is pushed into the corresponding cylindrical groove under force, and the seventh spring 361 is continuously compressed and deformed. During work, after multiple measurements at the same horizontal height on both sides of the crack are completed, the electric slider works to drive the sliding plate 111 to move downward. Through the cooperation between the crack and the guiding group 42, the guiding group 42 drives the centering group 43 to move downward along the crack. The sliding plate 111 moves downward until the positioning post 360 is clamped in the positioning groove 36 and stops moving, and then the above measurement steps are repeated.

[0050] After multiple measurements are completed, the moving unit 2 drives the guiding unit 4 to move away from contact with the crack. The external motor works to drive the gear 331 to rotate through the transmission shaft 330. Through the meshing between the gear 331 and the rack 332, the two racks 332 approach each other. The rack 332 drives the T-shaped plate 333 to move synchronously. After the T-shaped plate 333 moves to contact the U-shaped strip 440, the T-shaped plate 333 pushes the front two U-shaped strips 440 to move backward. Through the cooperation between the moving strip 444 and the pushing strip on the second moving block 445, the two relatively front and rear U-shaped strips 440 approach each other until the vertical column moves into the transverse section 446 of the moving groove 44. During the process of the U-shaped strips 440 approaching each other, the U-shaped strips 440 push the guiding group 42 and the centering group 43 to reset.

[0051] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0052] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A crack measurement device for geological disaster monitoring, characterized in that: include: A fixed plate, a push plate is fixedly provided on the left end surface of the fixed plate, two sliding columns are slidably penetrated on the push plate, a bracket plate is fixedly provided on the left end surfaces of the two sliding columns, a spring 1 sleeved on the sliding column is fixed between the bracket plate and the push plate, a sliding groove is provided on the bracket plate, a sliding plate is provided in the sliding groove to slide up and down, a sliding block is provided on the sliding plate to slide left and right, two placement plates symmetrically distributed up and down are fixed on the left end surface of the sliding block through a vertical bar, and a tightening plate is fixed on the left end surfaces of the two placement plates; The right end surface of the fixed plate is provided with a moving unit, and the pressing plate and the sliding plate are jointly provided with a measuring unit, and the measuring unit includes a sliding groove, and two sliding grooves symmetrically distributed front and back are provided on the pressing plate, and a sliding bar is slidably provided in the sliding groove, and a pushing rod is slidably provided on the sliding bar, and an ultrasonic probe is fixedly provided on the left end surface of the pushing rod, and a moving group is jointly provided between the two sliding bars, and a limiting group for limiting the sliding bar is provided on the right end surface of the pressing plate, and a pushing group for pushing the pushing rod to move is provided on the sliding plate; The left end surface of the abutting plate is provided with a guide unit, the guide unit includes a fixed rod fixedly provided on the left end surface of the abutting plate, a rectangular plate is slidably provided on the left end surface of the fixed rod through a rectangular block, a guide group for guiding the movement of the abutting plate is provided on the rectangular plate, and a centering group is provided on the fixed rod; The centering group includes a fixed block fixedly sleeved on the fixed rod, the upper and lower end surfaces of the fixed block are fixed with vertical rods, a horizontal bar is slidably sleeved on the vertical rod, two springs are arranged between the horizontal bar and the fixed block, two front-to-back symmetrical connecting bars are hinged on the horizontal bar, the two upper and lower opposite connecting bars are hinged together with the horizontal rod, and one end of the horizontal rod close to the rectangular plate is rotatably sleeved with a second roller; Two front-to-back symmetrical moving grooves are provided on the opposite back sides of the two placement plates. The moving grooves are in the shape of right-angled triangles. The inclined sections of the two moving grooves on the same placement plate are back to back and approach each other from left to right. A U-shaped bar opening to the right is slidably arranged in the moving groove through a vertical column. Two front-to-back distributed connecting plates are fixedly arranged on the placement plate. A connecting rod slides through the connecting plate. The connecting rod is slidably connected to the U-shaped bar through a moving block 1. A spring 3 is fixedly arranged between the moving block 1 and the rectangular plate. Moving bars are slidably arranged on the upper middle parts of the opposite back sides of the two placement plates. Moving blocks 2 are slidably arranged on the opposite surfaces of the U-shaped bar. A pushing bar is hinged between the moving block 2 and the moving bar.

2. A crack measurement device for geological disaster monitoring according to claim 1, characterized in that: The guide group includes a rectangular groove, four rectangular grooves are opened on the rectangular plate, support bars are hinged in the rectangular grooves through rotating columns, a torsion spring mounted on the rotating column is fixed between the support bar and the inner wall of the corresponding rectangular groove, and a roller is arranged on the side of the support bar away from the rectangular plate through a rotating rod.

3. The crack measurement device for geological disaster monitoring according to claim 1, characterized in that: The lower inner wall of the moving groove is provided with three inclined surfaces, and the moving groove is divided into a transverse section, an inclined section and a longitudinal section by the three inclined surfaces.

4. The crack measurement device for geological disaster monitoring according to claim 1, characterized in that: The pushing group includes a pushing column, and the sliding plate slides through two pushing columns symmetrically distributed front and back, a circular plate 1 is fixedly provided on the right end face of the pushing column, a spring 4 mounted on the corresponding pushing column is fixedly provided between the circular plate 1 and the sliding plate, a transverse plate is fixedly provided on the left end face of the pushing column, a moving block 3 is slidably provided on the transverse plate, the moving block 3 is slidably mounted on the pushing rod, a circular plate 2 located on the left side of the transverse plate is fixedly mounted on the pushing rod, and a spring 5 mounted on the corresponding pushing rod is fixedly provided between the circular plate 2 and the corresponding moving block 3.

5. The crack measurement device for geological disaster monitoring according to claim 1, characterized in that: The moving group includes a transmission shaft, the right end face of the clamping plate is rotatably provided with a transmission shaft, a gear is fixedly sleeved on the transmission shaft, a rack meshing with the gear is fixedly provided on the sliding bar through a connecting block, and a T-shaped plate is fixedly provided on the front end face of the sliding bar on the front side.

6. A crack measurement device for geological disaster monitoring according to claim 5, characterized in that: The limiting group includes a placement groove, a plurality of placement grooves distributed at equal distances are provided on the right end surface of the clamping plate, and the placement groove is connected with the sliding groove on the rear side, a positioning strip is slidably arranged in the placement groove, and the positioning strip is divided into an isosceles triangle segment and a strip segment from top to bottom, a spring six is ​​fixedly arranged between the positioning strip and the lower inner wall of the placement groove, a pushing groove is provided in the strip segment of the positioning strip, and the pushing groove is a right-angled trapezoid with an inclined surface facing upward, and the inclined surface of the pushing groove is inclined upward from left to right, a plurality of transmission rods are fixedly arranged on the left end surface of the rear horizontal plate, and the transmission rods correspond to the placement grooves one by one, and a plurality of through holes corresponding to the transmission rods are provided on the clamping plate.

7. The crack measurement device for geological disaster monitoring according to claim 1, characterized in that: The inner walls on both sides of the front and rear of the slide groove are provided with a plurality of equidistantly distributed positioning grooves, the sliding plate is provided with a plurality of cylindrical grooves respectively located on the front and rear sides of the sliding plate, a positioning column is slidably arranged in the cylindrical groove, and the end surface of the positioning column close to the positioning groove is a spherical surface, a spring seven is fixedly arranged between the positioning column and the inner wall of the cylindrical groove, and the sliding plate is driven up and down by an electric slider.

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