A local scour real-time monitoring experimental device based on transparent pile image recognition

Abstract

The invention relates to the technical field of pile monitoring experimental devices, and provides a local scour real-time monitoring experimental device based on transparent pile image recognition, comprising a device body, wherein the device body comprises a hollow transparent pile foundation model, an end of the pile foundation model away from the ground is connected with a driving system, the driving system is connected with a driving shaft inserted into the pile foundation model, an end of the driving shaft away from the driving system is connected with a camera, the driving system drives the driving shaft to rise and fall and rotate, and the camera is synchronously raised and lowered and rotated with the driving shaft; the invention can avoid measurement errors caused by factors such as water surface fluctuations, water refraction, turbidity, and non-horizontal shooting angles; during the measurement process, the driving system drives the driving shaft to enable the camera to scan and measure along the pile axis and pile circumference of the pile foundation model, the camera is driven by the driving shaft, and is raised and lowered and rotated by the driving system, and the entire measurement process does not require any operation by an experimental operator, thereby saving manpower.

Description

Technical Field

[0001] The invention relates to the technical field of pile monitoring experimental devices, and in particular to a local scour real-time monitoring experimental device based on transparent pile image recognition. Background Art

[0002] Large-diameter single piles are the most widely used foundation for offshore wind turbines. Large-diameter single pile foundations have good bearing capacity and can ensure the stability of wind turbine structures under wind loads and wave and current loads. Under the single or combined action of ocean environmental loads such as currents and waves, the seabed surface soil around the pile foundation is eroded by horseshoe vortices and tail vortices, which is prone to significant local scouring near the pile body, thereby reducing the effective embedding depth of the large-diameter single pile and having an adverse effect on the safe operation of the wind turbine, mainly including: (1) greatly weakening the horizontal bearing capacity of the large-diameter single pile foundation, affecting the safe operation of the upper wind turbine; (2) reducing the natural frequency of the pile foundation, making the natural frequency of the pile foundation close to the high-frequency part of the wave, which in turn leads to a more intense dynamic response of the pile foundation under the action of waves; (3) causing the J-tube, an auxiliary structure that fixes the submarine cable on the surface of the pile foundation, to be suspended, affecting its structural safety. Therefore, as an important research method for pile perimeter scouring, model tests are very necessary to accurately measure the soil scouring depth during the test.

[0003] The traditional measurement methods for the scouring depth of soil around piles during model tests mainly include ultrasonic topographs, laser rangefinders, external cameras, etc. The above methods are easily affected by environmental interference during the test, which affects the measurement accuracy: for example, ultrasonic topographs and laser rangefinders will be affected by suspended particles near the mud surface and cannot work properly, and continuous measurement cannot be achieved around the pile. The external camera method is interfered by factors such as water turbidity, water refraction, and shooting angle, which affects the measurement results.

[0004] The internal camera method has been widely used in the engineering field to detect the quality of pipe piles and cast-in-place piles and pile damage. This method uses artificial means to drill a camera deep into the pile body to shoot and check the cavities or cracks inside the pile body. The existing technology uses the internal camera method to measure the scour depth of the soil around the transparent model pile in the laboratory. It uses a stepper motor to drive the reflector set near the mud surface depth to rotate around the pile. By shooting the image in the reflector and using the color gradient method to identify the mud surface position in the image, the scour depth around the pile is measured. Although this method can obtain a clearer scour image around the pile, due to the fixed depth of the reflector, when the scour depth changes greatly, it will not be possible to fully measure the evolution of the scour depth. Moreover, the development process of the scour depth around the pile often takes several hours or even more than ten hours. The use of the above method requires the experimenter to be on duty on site and manually switch the motor to complete the timed measurement. This will cause a huge waste of time when the scour depth changes very slowly in the later stage of the test.

[0005] How to effectively solve the above technical problems is a problem that those skilled in the art need to solve. Summary of the invention

[0006] In order to solve the above technical problem or at least partially solve the above technical problem, the present invention provides a local scour real-time monitoring experimental device based on transparent pile image recognition.

[0007] The local scour real-time monitoring experimental device based on transparent pile body image recognition includes a device body, the device body includes a hollow transparent pile foundation model, the end of the pile foundation model away from the ground is connected to a drive system, the drive system is connected to a drive shaft inserted into the pile foundation model, and the end of the drive shaft away from the drive system is connected to a camera;

[0008] The driving system drives the driving shaft to rise, fall and rotate, and the camera is synchronously raised, fallen and rotated along with the driving shaft.

[0009] Furthermore, the driving system includes a power source, the power source is connected to an intermittent control unit, the intermittent control unit is connected to a reciprocating control unit, and the reciprocating control unit is connected to a rotation control unit.

[0010] Further, the intermittent control unit includes: a fixing plate;

[0011] A first wheel set is disposed on one side of the fixing plate, a belt with a through hole is connected to the first wheel set, a first gear coaxial with the first wheel set is disposed on the other side of the fixing plate, and a worm meshing with the first gear is disposed at the end of the output shaft of the power source;

[0012] The through hole is connected to a first contact block, the output shaft of the power source is connected to a first clutch arm, the first clutch arm is provided with a blind hole, a contact switch for controlling the camera is provided in the blind hole, a third gear and a second contact block that can touch the first contact block are provided on the free end of the first clutch arm, and a transmission gear connected to the third gear through a chain is also provided on the output shaft of the power source.

[0013] Further, the first wheel set includes a first pulley and a second pulley, the first pulley is coaxial with the first gear and rotates synchronously with the rotation of the first gear.

[0014] Furthermore, the intermittent control unit further comprises a retaining pin, which is inserted into the blind hole and contacts the contact switch during the process of the first contact block contacting the second contact block;

[0015] The retaining pin is also provided with a return spring.

[0016] Further, the reciprocating control unit comprises: a first control mechanism connected to the intermittent control unit, the first control mechanism is further connected to a second control mechanism;

[0017] The first control mechanism comprises a first rotating shaft, to which a shaft bracket and a gear plate connected to the output shaft of the power source are respectively connected, and a second gear set for reversing the first rotating shaft is arranged on the first rotating shaft passing through the gear plate, and the second gear set is meshed with a third gear set for accelerating the first rotating shaft;

[0018] The second control mechanism includes a second rotating shaft with a thread on its surface, a coupling is connected between the second rotating shaft and the first rotating shaft, a protective shell is arranged outside the second rotating shaft, and a fixing ring assembly connected to both the shaft bracket and the protective shell is arranged on the second rotating shaft located inside the protective shell.

[0019] Further, the second gear set includes a sixth gear and a seventh gear respectively arranged on the first rotating shaft, the sixth gear and the seventh gear are meshed with an eighth gear, the eighth gear is connected to a first gear connecting shaft, and the other end of the first gear connecting shaft is connected to a ninth gear;

[0020] The third gear set includes a tenth gear meshing with the ninth gear, the tenth gear meshing with the eleventh gear located on the gear plate, the eleventh gear is provided with a worm connecting shaft passing through the gear plate, the other end of the worm connecting shaft is provided with a twelfth gear, and the twelfth gear is also meshed with the third gear.

[0021] Further, the fixing ring assembly comprises a fixing ring connected to the shaft bracket, and a plurality of spring top beads connected to the protective shell are evenly arranged on the fixing ring;

[0022] A reversing spring connected to the fixing ring is arranged outside the second rotating shaft located in the protective shell, and the end of the reversing spring away from the fixing ring is connected to a first limiting plate movable along the second rotating shaft, and a plurality of connecting rods are hinged on the first limiting plate.

[0023] Further, the rotation control unit comprises: a guide cylinder;

[0024] A lifting ring is connected to the second rotating shaft located in the guide cylinder, and a guide groove is provided on the inner side wall of the guide cylinder;

[0025] The lifting ring in contact with the second rotating shaft is provided with a lifting ring thread, the lifting ring thread is connected to the thread on the second rotating shaft, the lifting ring is provided with a plurality of guide wheels sliding in the guide groove, and the lifting ring is also provided with an annular groove for the retaining pin to pass through.

[0026] Furthermore, a second limiting plate is provided at the end of the second rotating shaft located in the guide cylinder away from the first limiting plate, and the end of the lifting ring close to the second limiting plate is connected to the driving shaft and drives the driving shaft to rise and fall and rotate;

[0027] The end of the connecting rod away from the first limiting plate is hinged to the second limiting plate.

[0028] In the present invention, the camera shoots the mud surface position from the inside of the pile body of the pile foundation model to the outside, which can avoid measurement errors caused by factors such as water surface fluctuations, water refraction, turbidity, and non-horizontal shooting angles.

[0029] During the measurement process, the drive system drives the drive shaft to make the camera scan and measure along the pile axis and pile circumference of the pile foundation model. The camera is driven by the drive shaft and the drive system to achieve lifting and rotation. In other words, the lifting and rotation actions are repeated until a complete 360-degree measurement of the pile circumference is completed, and finally a complete 360-degree scan of the pile circumference within the axial target range of the pile body is achieved, and a full measurement is performed on the working conditions where a large depth of scouring occurs.

[0030] The experiment operator can set the scanning time interval arbitrarily through the driving system. After the camera completes a scanning action under the device drive, it will automatically complete the subsequent multiple scans according to the time interval preset by the experimenter. The whole measurement process does not require any operation by the experiment operator, saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the device body provided by the present invention;

[0032] Figure 2 It is a structural schematic diagram of the drive system provided by the present invention;

[0033] Figure 3 It is a front view stereoscopic structural schematic diagram of the intermittent control unit provided by the present invention;

[0034] Figure 4 It is a rear-view stereoscopic structural schematic diagram of the intermittent control unit provided by the present invention;

[0035] Figure 5 It is a schematic diagram of the front three-dimensional structure of the reciprocating control unit provided by the present invention;

[0036] Figure 6 It is a left-view stereoscopic structural diagram of the reciprocating control unit provided by the present invention;

[0037] Figure 7 It is a structural schematic diagram of the slewing control unit provided by the present invention;

[0038] Figure 8 It is a structural schematic diagram of the lifting ring and the guide groove provided by the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the guide groove provided by the present invention;

[0040] Reference numerals:

[0041] 1. Pile foundation model;

[0042] 2. Drive shaft;

[0043] 3. Stable disk;

[0044] 4. Camera;

[0045] 5. Drive system; 51. Power source;

[0046] 52, intermittent control unit; 521, fixed plate; 522, second pulley; 523, first pulley; 524, third gear; 525, first clutch arm; 5251, blind hole; 5252, second contact block; 5253, first torsion spring; 526, retaining pin; 5261, return spring; 527, belt; 5271, first contact block; 528, worm; 529, first gear;

[0047] 53, reciprocating control unit; 531, second gear set; 5311, sixth gear; 5312, seventh gear; 5313, eighth gear; 5314, ninth gear; 532, third gear set; 5321, twelfth gear; 5322, tenth gear; 5323, eleventh gear; 533, shaft bracket; 5331, gear plate; 534, second rotating shaft; 535, fixing ring; 5351, spring top ball; 536, reversing spring; 537, first limit plate; 538, connecting rod; 539, protective shell; 5391, coupling; 5392, first rotating shaft;

[0048] 54. Rotation control unit; 541. Guide cylinder; 5411. Guide groove; 542. Lifting ring; 5421. Guide wheel; 5422. Annular groove; 543. Second limiting plate. DETAILED DESCRIPTION

[0049] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The following examples are only used to explain the present invention, rather than to limit the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention. If not otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0050] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Terms such as "connection" 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 a direct connection or an indirect connection through an intermediate medium. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0051] An embodiment provided by the present invention is as follows Figure 1As shown, a local scour real-time monitoring experimental device based on transparent pile image recognition includes a device body, the device body includes a hollow transparent pile foundation model 1, the end of the pile foundation model 1 away from the ground is connected to a driving system 5, the driving system 5 is connected to a driving shaft 2 inserted into the pile foundation model 1, and the end of the driving shaft 2 away from the driving system 5 is connected to a camera 4.

[0052] The driving system 5 drives the driving shaft 2 to rise, fall and rotate, and the camera 4 rises, falls and rotates synchronously with the driving shaft 2 .

[0053] In this embodiment, the pile foundation model 1 is embedded at a target depth to simulate the seabed, and the pile top is located at a target height above the water surface.

[0054] The camera 4 shoots the mud surface position from the inside of the pile body of the pile foundation model 1 to the outside, which can avoid measurement errors caused by factors such as water surface fluctuations, water refraction, turbidity, and non-horizontal shooting angles.

[0055] During the measurement process, the driving system 5 drives the driving shaft 2 to make the camera 4 scan and measure along the pile axis and the pile circumference of the pile foundation model 1. The camera 4 moves with the driving shaft 2, and is driven by the driving system 5 to achieve single or multiple repeated lifting and rotation. In other words, the lifting and rotation actions are repeated until a complete 360-degree measurement of the pile circumference is completed, and finally a complete 360-degree scan of the pile circumference within the axial target range of the pile body is achieved, and a full measurement is performed for the working condition where a large depth of scouring occurs.

[0056] The experiment operator can set the scanning time interval arbitrarily through the driving system 5. After the camera 4 completes a scanning action under the device drive, it will automatically complete the subsequent multiple scans according to the time interval preset by the experimenter. The whole measurement process does not require any operation by the experiment operator, saving manpower.

[0057] Another embodiment provided by the present invention is as follows Figure 2 As shown, the driving system 5 includes a power source 51 , the power source 51 is connected to an intermittent control unit 52 , the intermittent control unit 52 is connected to a reciprocating control unit 53 , and the reciprocating control unit 53 is connected to a rotation control unit 54 .

[0058] In this embodiment, the power source 51 is a constant speed motor. The drive system 5 is designed entirely based on the mechanical transmission principle, does not require a servo system or other electromagnetic control devices, and works reliably. The drive system 5 and its driving function only require a constant speed motor as the power source 51, and has no additional requirements for the motor speed and steering control, which is convenient for general laboratory use.

[0059] Another embodiment provided by the present invention, in combination with Figure 3 and Figure 4 The intermittent control unit 52 includes a fixing plate 521 .

[0060] A first wheel set is provided on one side of the fixed plate 521, and a belt 527 with a through hole is connected to the first wheel set. A first gear 529 coaxial with the first wheel set is provided on the other side of the fixed plate 521, and a worm 528 meshing with the first gear 529 is provided at the end of the output shaft of the power source 51.

[0061] The through hole is connected to a first contact block 5271, the output shaft of the power source 51 is connected to a first clutch arm 525, the first clutch arm 525 is provided with a blind hole 5251, the blind hole 5251 is provided with a contact switch for controlling the camera 4, the free ends of the first clutch arm 525 are respectively provided with a third gear 524 and a second contact block 5252 that can touch the first contact block 5271, and the output shaft of the power source 51 is also provided with a transmission gear connected to the third gear 524 through a chain.

[0062] In this embodiment, the number of through holes and the distance between adjacent through holes can be preset according to the measurement interval requirements. The experimental operator fixes the target number of first contact blocks 5271 on the through holes of the target distance according to the measurement interval requirements.

[0063] The first clutch arm 525 rotates around the output shaft of the power source 51 .

[0064] During operation of the power source 51, the worm 528 is driven to rotate, the worm 528 drives the first gear 529 to rotate, the first gear 529 drives the first wheel set to rotate, thereby driving the belt 527 and the first contact block 5271 to move slowly. When the first contact block 5271 contacts the second contact block 5252, the first contact block 5271 will push the first clutch arm 525 to make the third gear 524 mesh with the twelfth gear 5322 of the third gear set 532 in the reciprocating control unit 53, thereby providing power for the reciprocating control unit 53 and the rotary control unit 54.

[0065] When the measurement starts, the retaining pin 526 is inserted into the blind hole 5251 and the contact switch is triggered, so that the camera 4 located underwater starts to collect images. At this time, when the first contact block 5271 is no longer in contact with the second contact block 5252, the third gear 524 can also continue to mesh with the twelfth gear 5321 to maintain the transmission. A first torsion spring 5253 is provided at the connection between the first clutch arm 525 and the output shaft of the power source 51. When the camera 4 completes a complete measurement along the pile circumference and the pile axis, the retaining pin 526 is pushed out of the blind hole 5251 as the camera 4 located underwater rises. The first clutch arm 525 is disengaged from the third gear set 532 under the action of the first torsion spring 5253, so that the transmission stops, and the camera 4 stops collecting images at the same time. Among them, the retaining pin 526 is pushed out of the blind hole 5251 as the camera 4 located underwater rises. The lifting ring 542 drives the drive shaft 2 and the camera 4 located underwater to rise, and the retaining pin 526 is pushed out of the blind hole 5251.

[0066] A second torsion spring is provided at the connection between the gear plate 5331 and the output shaft of the power source 51 .

[0067] In order to illustrate that the first gear 529 drives the first wheel group to rotate, and the belt 527 rotates on the first wheel group, another embodiment provided by the present invention is combined with Figure 3 and Figure 4 The first wheel set includes a first pulley 523 and a second pulley 522. The first pulley 523 is coaxial with the first gear 529 and rotates synchronously with the rotation of the first gear.

[0068] To further illustrate the retaining pin 526, another embodiment of the present invention is provided as follows: Figure 3 As shown, the intermittent control unit 52 further includes a retaining pin 526, which is inserted into the blind hole 5251 and contacts the contact switch when the first contact block 5271 contacts the second contact block 5252.

[0069] A return spring 5261 is also provided on the retaining pin 526 .

[0070] Another embodiment provided by the present invention, in combination with Figure 5 and Figure 6 The reciprocating control unit 53 includes: a first control mechanism connected to the intermittent control unit 52, and the first control mechanism is also connected to a second control mechanism.

[0071] The first control mechanism includes a first rotating shaft 5392, to which are respectively connected a shaft bracket 533 and a gear plate 5331 connected to the output shaft of the power source 51; a second gear set 531 for reversing the first rotating shaft 5392 is provided on the first rotating shaft 5392 passing through the gear plate 5331; the second gear set 531 is meshed with a third gear set 532 for accelerating the first rotating shaft 5392.

[0072] The second control mechanism includes a second rotating shaft 534 with a threaded surface, a coupling 5391 is connected between the second rotating shaft 534 and the first rotating shaft 5392, a protective shell 539 is arranged outside the second rotating shaft 534, and a fixing ring assembly connected to both the shaft bracket 533 and the protective shell 539 is arranged on the second rotating shaft 534 located inside the protective shell 539.

[0073] In this embodiment, the third gear set 532 drives the second gear set 531 to rotate, thereby driving the first rotating shaft 5392 .

[0074] The first rotating shaft 5392 is mounted on the shaft bracket 533 and can rotate relative to the shaft bracket 533. The second rotating shaft 534 can freely move relative to the first rotating shaft 5392 along the axial direction.

[0075] The fixing ring assembly is lifted, lowered and rotated in the protective shell 539 according to preset requirements, thereby driving the camera 4 to be lifted, lowered and rotated according to preset requirements.

[0076] In order to illustrate the specific connection relationship between the second gear set 531 and the third gear set 532, another embodiment provided by the present invention is combined with Figure 5 and Figure 6 The second gear set 531 includes a sixth gear 5311 and a seventh gear 5312 respectively arranged on the first rotating shaft 5392, an eighth gear 5313 is meshed between the sixth gear 5311 and the seventh gear 5312, the eighth gear 5313 is connected to the first gear connecting shaft, and the other end of the first gear connecting shaft is connected to the ninth gear 5314.

[0077] The third gear set 532 includes a tenth gear 5322 meshing with the ninth gear 5314, the tenth gear 5322 meshing with the eleventh gear 5323 located on the gear plate 5331, the eleventh gear 5323 is provided with a worm connecting shaft passing through the gear plate 5331, the other end of the worm connecting shaft is provided with a twelfth gear 5321, and the twelfth gear 5321 is meshed with the third gear 524 at the same time.

[0078] In this embodiment, the eighth gear 5313 is meshed with the sixth gear 5311 or the seventh gear 5312 respectively.

[0079] The tenth gear 5322 includes a bevel gear and a flat gear, which are coaxial and fixed, and the flat gear in the tenth gear 5322 is meshed with the eleventh gear 5323, and the bevel gear is meshed with the ninth gear 5314. Thus, the tenth gear 5322, the twelfth gear 5321 and the eleventh gear 5323 form an acceleration device group to increase the moving speed of the camera.

[0080] Another embodiment provided by the present invention, in combination with Figure 5 and Figure 6 and Figure 7 The fixing ring assembly includes a fixing ring 535 connected to the shaft bracket 533, and a plurality of spring top beads 5351 connected to the protective shell 539 are evenly arranged on the fixing ring 535;

[0081] A reversing spring 536 connected to the fixing ring 535 is arranged outside the second rotating shaft 534 located in the protective shell 539, and the end of the reversing spring 536 away from the fixing ring 535 is connected to a first limiting plate 537 that can move along the second rotating shaft 534, and multiple connecting rods 538 are hinged on the first limiting plate 537.

[0082] In this embodiment, two grooves are processed in the circumferential direction on the fixing ring 535 , so that the fixing ring 535 can move freely in the axial direction relative to the second rotating shaft 534 . The fixing ring 535 close to the first rotating shaft 5392 is connected to the shaft bracket 533 .

[0083] When measuring starts, the upper surface of the lifting ring 542 contacts the lower end of the retaining pin 526. The retaining pin 526 moves downward along with the lifting ring 542 under the traction of the return spring 5261 until the upper end of the retaining pin 526 is inserted into the blind hole 5251. At this time, the underwater camera 4 starts shooting, and the third gear 524 is meshed with the twelfth gear 5321 in the third gear set 532.

[0084] When the lifting ring 542 moves downward and contacts the second limiting plate 543, the second limiting plate 543 moves downward, and at the same time drives the first limiting plate 537 to move downward through the connecting rod 538, and further tensions the reversing spring 536. When the tension of the reversing spring 536 increases to its own tensioning critical value, the fixing ring 535 suddenly drops after overcoming the locking force of the spring top bead 5351, and the spring top bead 5351 continues to lock the fixing ring 535 after being embedded in the adjacent groove on the fixing ring 535. The descent of the fixing ring 535 drives the shaft bracket 533 and the first rotating shaft 5392 to drop, thereby changing the direction of the meshing gears of the second gear set 531, and further changing the rotation direction of the first rotating shaft 5392 and the movement direction of the lifting ring 542.

[0085] When the lifting ring 542 moves upward and contacts the first limiting plate 537, the first limiting plate 537 moves upward, causing a transmission process opposite to the process when the lifting ring 542 moves downward and contacts the second limiting plate 543, thereby changing the rotation direction of the first rotating shaft 5392 and the movement direction of the lifting ring 542 again.

[0086] Another embodiment provided by the present invention, in combination with Figure 7 , Figure 8 and Fig. 9 , the rotation control unit 54 includes: a guide cylinder 541;

[0087] A lifting ring 542 is connected to the second rotating shaft 534 located in the guide cylinder 541, and a guide groove 5411 is provided on the inner wall of the guide cylinder 541;

[0088] A lifting ring thread is provided on the lifting ring 542 at the contact point with the second rotating shaft 534, and the lifting ring thread is connected to the thread on the second rotating shaft 534. The lifting ring 542 is provided with a plurality of guide wheels 5421 sliding in the guide groove 5411, and the lifting ring 542 is also provided with an annular groove 5422 for the retaining pin 526 to pass through.

[0089] In this embodiment, the rotation control unit 54 causes the lifting ring 542 to rotate around the second rotation axis by a certain angle after completing a scan from top to bottom or from bottom to top.

[0090] The guide groove 5411 is connected longitudinally and obliquely, so that the guide wheel 5421 on the lifting ring 542 slides in the guide groove 5411, thereby realizing the lifting and lowering of the lifting ring 542.

[0091] The guide groove 5411 is connected horizontally and obliquely, so that the guide wheel 5421 on the lifting ring 542 slides in the guide groove 5411.

[0092] When the camera 4 rotates less than one circle around the pile of the pile foundation model 1 and the lifting ring 542 rises, the lower end of the retaining pin 526 smoothly passes through the annular groove 5422 set on the lifting ring 542, so that the lifting ring 542 does not cause the retaining pin 526 to be pushed upward, and the first clutch arm 525 maintains the transmission state. When the camera 4 rotates one circle around the pile and completes all measurements, the position without the annular groove 5422 on the edge of the lifting ring 542 will face the retaining pin 526, and the lifting ring 542 will rise to contact the retaining pin 526 and push the retaining pin 526 upward, so that the third gear 524 is out of mesh with the twelfth gear 5321 in the third gear set 532, and the intermittent control unit loses power and stops working.

[0093] The annular groove 5422 in the present invention is a vertical groove arranged along a ring shape.

[0094] Another embodiment provided by the present invention, in combination with Figure 7 , Figure 8 and Fig. 9 The end of the second rotating shaft 534 located in the guide cylinder 541 away from the first limiting plate 537 is provided with a second limiting plate 543, and the end of the lifting ring 542 close to the second limiting plate 543 is connected to the driving shaft 2 and drives the driving shaft 2 to rise and fall and rotate (due to Figure 7 In order to show the second rotating shaft, the end of the lifting ring close to the second limiting plate is not shown connected to the drive shaft).

[0095] The end of the connecting rod 538 away from the first limiting plate 537 is hinged to the second limiting plate 543, so that the first limiting plate 537 and the second limiting plate 543 can be lifted and lowered synchronously.

[0096] In this embodiment, both the first limiting plate 537 and the second limiting plate 543 can freely move axially relative to the second rotating shaft 534 .

[0097] In the present invention, in order to increase the stability of the end of the driving shaft 2 close to the simulated seabed, a stabilizing disc 3 is provided on the driving shaft 2 close to the simulated seabed. The diameter of the stabilizing disc 3 is smaller than the inner diameter of the pile foundation model 1 and rotates with the driving shaft 2.

[0098] The above is not intended to limit the present invention. Finally, it should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, not to limit it. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents. The modifications or replacements made without departing from the spirit of the present invention are all within the scope of protection claimed by the present invention.

Claims

1. A local scour real-time monitoring experimental device based on transparent pile image recognition, comprising a device body, characterized in that: The device body comprises a hollow transparent pile foundation model, the end of the pile foundation model away from the ground is connected to a driving system, the driving system is connected to a driving shaft inserted into the pile foundation model, and the end of the driving shaft away from the driving system is connected to a camera; The driving system drives the driving shaft to rise, fall and rotate, and the camera is synchronously raised, fallen and rotated with the driving shaft; The driving system comprises a power source, the power source is connected to an intermittent control unit, the intermittent control unit is connected to a reciprocating control unit, and the reciprocating control unit is connected to a rotation control unit; The intermittent control unit comprises: Fixed plate; A first wheel set is disposed on one side of the fixing plate, a belt with a through hole is connected to the first wheel set, a first gear coaxial with the first wheel set is disposed on the other side of the fixing plate, and a worm meshing with the first gear is disposed at the end of the output shaft of the power source; The through hole is connected to a first contact block, the output shaft of the power source is connected to a first clutch arm, the first clutch arm is provided with a blind hole, a contact switch for controlling the camera is provided in the blind hole, a third gear and a second contact block that can touch the first contact block are provided on the free end of the first clutch arm, and a transmission gear connected to the third gear through a chain is also provided on the output shaft of the power source.

2. The local scour real-time monitoring experimental device based on transparent pile image recognition according to claim 1 is characterized in that: The first pulley set includes a first pulley and a second pulley, wherein the first pulley is coaxial with the first gear and rotates synchronously with the rotation of the first gear.

3. The local scour real-time monitoring experimental device based on transparent pile image recognition according to claim 2 is characterized in that: The intermittent control unit further comprises a retaining pin, which is inserted into the blind hole and contacts the contact switch during the process of the first contact block contacting the second contact block; The retaining pin is also provided with a return spring.

4. The local scour real-time monitoring experimental device based on transparent pile image recognition according to claim 1 is characterized in that: The reciprocating control unit comprises: A first control mechanism connected to the intermittent control unit, wherein the first control mechanism is further connected to a second control mechanism; The first control mechanism comprises a first rotating shaft, to which a shaft bracket and a gear plate connected to the output shaft of the power source are respectively connected, and a second gear set for reversing the first rotating shaft is arranged on the first rotating shaft passing through the gear plate, and the second gear set is meshed with a third gear set for accelerating the first rotating shaft; The second control mechanism includes a second rotating shaft with a thread on its surface, a coupling is connected between the second rotating shaft and the first rotating shaft, a protective shell is arranged outside the second rotating shaft, and a fixing ring assembly connected to both the shaft bracket and the protective shell is arranged on the second rotating shaft located inside the protective shell.

5. The local scour real-time monitoring experimental device based on transparent pile image recognition according to claim 4 is characterized in that: The second gear set includes a sixth gear and a seventh gear respectively arranged on the first rotating shaft, the sixth gear and the seventh gear are meshed with an eighth gear, the eighth gear is connected to a first gear connecting shaft, and the other end of the first gear connecting shaft is connected to a ninth gear; The third gear set includes a tenth gear meshing with the ninth gear, the tenth gear meshing with the eleventh gear located on the gear plate, the eleventh gear is provided with a worm connecting shaft passing through the gear plate, the other end of the worm connecting shaft is provided with a twelfth gear, and the twelfth gear is also meshed with the third gear.

6. The local scour real-time monitoring experimental device based on transparent pile image recognition according to claim 4 is characterized in that: The fixing ring assembly comprises a fixing ring connected to the shaft bracket, and a plurality of spring top beads connected to the protective shell are evenly arranged on the fixing ring; A reversing spring connected to the fixing ring is arranged outside the second rotating shaft located in the protective shell, and the end of the reversing spring away from the fixing ring is connected to a first limiting plate movable along the second rotating shaft, and a plurality of connecting rods are hinged on the first limiting plate.

7. The local scour real-time monitoring experimental device based on transparent pile image recognition according to claim 6 is characterized in that: The slewing control unit comprises: Guide cylinder; A lifting ring is connected to the second rotating shaft located in the guide cylinder, and a guide groove is provided on the inner side wall of the guide cylinder; The lifting ring in contact with the second rotating shaft is provided with a lifting ring thread, the lifting ring thread is connected to the thread on the second rotating shaft, the lifting ring is provided with a plurality of guide wheels sliding in the guide groove, and the lifting ring is also provided with an annular groove for the retaining pin to pass through.

8. The local scour real-time monitoring experimental device based on transparent pile image recognition according to claim 7 is characterized in that: A second limiting plate is provided at the end of the second rotating shaft located in the guide cylinder and away from the first limiting plate, and the end of the lifting ring close to the second limiting plate is connected to the driving shaft and drives the driving shaft to rise and fall and rotate; The end of the connecting rod away from the first limiting plate is hinged to the second limiting plate.

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