Monitoring device applied to pile foundation construction vibration

Abstract

The application discloses a kind of applied to pile foundation construction vibration monitoring device, including with preset laying line direction directional movement mobile car body, annular conveyor belt has several three-dimensional vibration sensors placed in interval along its annular path in turn, all three-dimensional vibration sensors are connected by signal cable series communication and form integrated monitoring loop, and with wireless vibration meter installed on mobile car body through data transmission line connection, wireless vibration meter is connected by wireless with data acquisition module, data acquisition module is connected by wireless with monitoring cloud platform, horizontal telescopic pump for pushing three-dimensional vibration sensor on annular conveyor belt is equipped in mobile car body, can realize full period coverage, high-precision monitoring, intelligent early warning.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a monitoring device for vibration in pile foundation construction. Background Technology

[0002] Pile foundation construction technology is widely used in various building foundation engineering fields due to its advantages such as simple equipment and low cost. Currently, the conventional pile foundation construction process typically includes: site survey, current condition investigation, scheme preparation, pile foundation layout, monitoring point arrangement, pile foundation construction, regular monitoring, and report generation. However, during construction, the high-intensity vibrations generated by pile foundation operations can easily be transmitted to the surrounding soil and foundation structure, posing a potential threat to adjacent dense buildings, precision equipment, or lifeline projects.

[0003] Current methods for controlling vibrations during pile foundation construction are still largely traditional and rudimentary, relying mainly on manual monitoring supplemented by simple physical buffering measures. These methods have significant technical shortcomings and safety hazards, specifically manifested in the following ways:

[0004] First, the physical aspects of vibration reduction measures are insufficient. Existing vibration reduction methods mostly involve simply laying buffer materials without taking systematic physical isolation measures along the vibration transmission path. This results in low vibration energy attenuation efficiency, making it difficult to meet the safety requirements of highly sensitive protected targets.

[0005] Secondly, the monitoring methods lack real-time performance and accuracy. They primarily rely on manually deploying total stations for periodic measurements, which not only suffers from time lag and cannot achieve 24-hour uninterrupted monitoring, but also suffers from errors due to manual operation, making it difficult to accurately capture instantaneous vibration peaks and provide timely warnings of sudden safety risks.

[0006] Third, data management is disconnected from the construction process. There is a lack of an intelligent management system integrating data collection, transmission, analysis, and early warning. Monitoring data cannot be transmitted remotely in real time and analyzed automatically, leading to a disconnect between vibration data and construction control instructions, slow response times, and increased risk of structural damage.

[0007] Therefore, achieving full-time coverage, high-precision monitoring, and intelligent early warning during pile foundation construction to ensure project safety and mitigate construction risks is a pressing technical problem that needs to be solved in the current technology. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide a monitoring device for vibration in pile foundation construction, which can achieve full-time coverage, high-precision monitoring and intelligent early warning during pile foundation construction.

[0009] The present invention relates to a monitoring device for vibration during pile foundation construction, comprising:

[0010] The mobile vehicle body can move directionally along a preset laying route. The mobile vehicle body has a vertical channel extending along the height direction and penetrating the mobile vehicle body. The top of the mobile vehicle body is equipped with a drill bit that can move up and down along the vertical channel. The mobile vehicle body has an annular channel surrounding the vertical channel. The annular channel and the vertical channel are connected by a connecting channel. An annular conveyor belt that moves along an annular path is provided in the annular channel. The annular conveyor belt is provided with a number of three-dimensional vibration sensors arranged at intervals along its annular path. The number of three-dimensional vibration sensors are connected in series through signal cables to form an integrated monitoring loop.

[0011] The data acquisition system includes a data acquisition module and a wireless vibration meter installed on a mobile vehicle. The three-dimensional vibration sensor is connected to the wireless vibration meter via an integrated monitoring circuit through a data transmission line. The wireless vibration meter is connected to the data acquisition module wirelessly, and the data acquisition module is connected to the monitoring cloud platform wirelessly. The mobile vehicle is equipped with a horizontal telescopic pump for pushing the three-dimensional vibration sensor on the annular conveyor belt. In use, the horizontal telescopic pump pushes the three-dimensional vibration sensor in a directional manner toward the connecting channel. The three-dimensional vibration sensor enters the connecting channel through the outlet of the annular channel and passes through the inlet of the vertical channel to enter the vertical channel. It then falls vertically into the drilling position of the drill bit.

[0012] Furthermore, the mobile vehicle body includes a chassis and a monitoring box mounted on the chassis. A support frame connects the monitoring box and the chassis. The monitoring box has an accommodating chamber. The chassis has a drive structure for driving the annular transmission belt. The bottom front end of the chassis has a drive wheel for moving the mobile vehicle body. Rollers are rotatably connected to both sides of the bottom rear end of the chassis.

[0013] Furthermore, the drive structure includes a frame located within the chassis, with a drive sprocket and a driven sprocket rotatably connected to both sides of the annular transmission belt within the frame, and an annular guide rail that is annular in shape and carries the annular conveyor belt within the annular channel;

[0014] The annular conveyor belt is a toothed chain plate type annular chain. The toothed chain plate type annular chain is placed in the annular guide rail and cooperates with the annular guide rail. The toothed chain plate type annular chain meshes with the driving sprocket and the driven sprocket respectively. The driving sprocket is coaxially connected to a drive motor I mounted on the frame.

[0015] Furthermore, a mounting cylinder extending upward toward the receiving cavity is provided at the middle position of the chassis. The bottom of the mounting cylinder passes through the chassis and extends downward. A drilling column extending along the height direction of the monitoring box is fixedly installed inside the mounting cylinder. A vertical channel penetrating the bottom of the chassis is formed inside the drilling column. A rotary motor is installed at the top of the monitoring box and located in the vertical channel. The output shaft of the rotary motor is coaxially connected to a rotating shaft extending downward along the vertical channel. A vertical telescopic pump is fixedly connected to the bottom of the rotating shaft. The vertical telescopic shaft of the vertical telescopic pump is fixedly connected to the drill bit.

[0016] Furthermore, a connecting frame is fixed to the bottom front end of the chassis by bolts and nuts. The connecting frame is mounted on the drive wheel. Support ears extending towards the drive wheel are respectively provided on both sides of the connecting frame. The drive wheel is rotatably connected to the support ears through a rotating shaft. A drive motor II is fixed on the connecting frame. A main gear is fixed on the output shaft of the drive motor II. A driven gear is sleeved on the rotating shaft between the support ears and the drive wheel. A chain is wound between the main gear and the driven gear.

[0017] Furthermore, a brake housing coaxially arranged with the drive wheel is mounted on the connecting frame. The drive wheel has a hub chamber for braking, and a brake hub coaxially arranged with the drive wheel is provided in the hub chamber. The brake hub is connected to the rotating shaft via a spline. An electromagnetic brake is provided in the brake hub. Several guide posts extending towards the drive wheel are evenly distributed along the circumferential direction of the brake hub. The two ends of each guide post are fixedly connected to the outer surface of the brake hub and the inner surface of the drive wheel, respectively. A cylindrical helical brake spring is sleeved on the guide post. One end of the brake spring presses against the positioning end face of the fixed brake housing, and the other end presses against an armature that can move axially and is located in the brake chamber. An electromagnetic coil is embedded in the annular groove inside the brake housing. The electromagnetic coil is arranged coaxially with the armature. A friction brake disc is provided between the armature and the brake hub. The friction brake disc rotates synchronously with the brake hub.

[0018] Furthermore, an infrared sensor is installed at the end of the connecting channel facing the outlet of the annular channel. The infrared sensor is used to detect the position of the three-dimensional vibration sensor reaching the connecting channel and send a detection signal to the microprocessor so that the microprocessor controls the opening and closing of the horizontal telescopic pump. The position of the horizontal telescopic pump corresponds to the position of the connecting channel. The horizontal telescopic pump is mounted on a fixed frame set in the receiving chamber. The output shaft of the horizontal telescopic pump is coaxially connected to a horizontal telescopic rod that extends and retracts toward the connecting channel. A support sleeve is fitted on one end of the horizontal telescopic rod. The support sleeve is connected to the fixed frame through a connecting rod. The other end of the horizontal telescopic rod is fixedly connected to a push head. A soft rubber body is fixed to the end of the push head away from the horizontal telescopic rod.

[0019] Furthermore, it also includes a guide sensor and a positioning sensor. The guide sensor is installed at the front end of the monitoring box and is used to detect the relative positional deviation between the moving vehicle and the preset laying line in real time and output a correction signal. The correction signal is sent to the microprocessor, which issues a command to control the start and stop of the drive motor II. The positioning sensor is installed at the bottom of the mounting cylinder and is used to detect the positional correspondence between the moving vehicle and the preset point on the preset laying line in real time and output a positioning signal. The positioning signal is sent to the microprocessor, which issues a command to control the start and stop of the vertical telescopic pump and the rotary motor together. The length of the vertical telescopic shaft of the vertical telescopic pump is the depth of the drill hole trench.

[0020] Furthermore, a proximity switch is installed on the output shaft of the vertical telescopic pump to detect the retraction state of the vertical telescopic shaft and output a switching signal. The switching signal is sent to the microprocessor, which simultaneously receives the detection signal from the infrared sensor. The microprocessor issues a command to control the opening and closing of the horizontal telescopic pump, which pushes the three-dimensional vibration sensor on the corresponding connecting channel of the annular conveyor belt into the vertical channel and falls into the empty trench after drilling.

[0021] Furthermore, the wireless vibration meter is mounted on a drive cover fitted onto the rotating motor. The internal space of the drive cover is connected to the receiving chamber of the monitoring box. The data transmission line of the wireless vibration meter passes through the top of the monitoring box and extends into the receiving chamber, thereby connecting the data transmission line to a series-connected three-dimensional vibration sensor.

[0022] The beneficial effects of the present invention: The monitoring device for pile foundation construction vibration of the present invention has the following beneficial effects compared with the prior art:

[0023] 1. This invention integrates a vertical drilling mechanism and a horizontal pushing mechanism inside the mobile vehicle body. With the help of a ring conveyor belt, it can automatically complete on-site drilling and push three-dimensional vibration sensors. It achieves integrated automated vibration monitoring of "carrying three-dimensional vibration sensors + directional installation of three-dimensional vibration sensors + intelligent monitoring" without manual construction. By automatically drilling through a preset laying path to form a continuously drilled trench, it realizes the reflection, scattering and attenuation of vibration energy, effectively reducing the transmission efficiency of construction vibration to the protected object. The vibration isolation effect is stable, the process is simple and the cost is controllable.

[0024] 2. This invention forms a vibration monitoring network by sequentially placing three-dimensional vibration sensors within continuously drilled trenches along a pre-set laying path. Through an integrated monitoring system combining three-dimensional vibration sensors, wireless vibration meters, data acquisition modules, and a cloud platform, it achieves high accuracy, strong anti-interference capabilities, and enables 24 / 7 uninterrupted automatic data acquisition, wireless transmission, and real-time analysis. The system operates stably, providing continuous and accurate data, unaffected by weather, site conditions, or human factors. It solves the problems of low frequency, data lag, and large errors associated with traditional manual monitoring, exhibiting a low failure rate and reliable monitoring results over long-term operation. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 The present invention relates to a monitoring device for vibration during pile foundation construction;

[0027] Figure 2 for Figure 1 Sectional view along the middle AA direction;

[0028] Figure 3 for Figure 1 Enlarged view of section B1.

[0029] Figure label:

[0030] 1. Monitoring box; 2. Chassis; 3. Drive cover; 4. Guide sensor; 5. Ventilation hole; 6. Observation hole; 7. Support frame; 8. Roller; 9. Drive wheel; 91. Connecting frame; 92. Drive motor II; 93. Protective rod; 94. Chain; 95. Rotating shaft; 96. Brake hub; 97. Brake spring; 10. Anti-collision strip; 11. Wireless vibration meter; 12. Rotating shaft; 13. Vertical telescopic pump; 14. Vertical telescopic shaft; 15. Drill bit; 16. Circular conveyor belt; 17. Three-dimensional vibration sensor; 18. Mounting cylinder; 19. Vertical channel; 20. Drilling column; 21. Connecting channel; 22. Soft rubber body; 23. Fixing frame; 24. Support sleeve; 25. Horizontal telescopic pump; 26. Push head; 27. Data transmission line; 28. Fixing nut. Detailed Implementation

[0031] like Figure 1-3 As shown: The monitoring device for vibration during pile foundation construction in this embodiment includes:

[0032] The mobile vehicle body can move directionally along a preset laying route. The mobile vehicle body has a vertical channel 19 extending along the height direction and penetrating the mobile vehicle body. The top of the mobile vehicle body is provided with a drill bit 15 that can move up and down along the vertical channel 19. The mobile vehicle body has an annular channel surrounding the vertical channel 19. The annular channel and the vertical channel 19 are connected by a connecting channel 21. An annular conveyor belt 16 that moves along an annular path is provided in the annular channel. The annular conveyor belt 16 is provided with a number of three-dimensional vibration sensors 17 arranged at intervals along its annular path. The number of three-dimensional vibration sensors 17 are connected in series through signal cables to form an integrated monitoring loop.

[0033] The data acquisition system includes a data acquisition module and a wireless vibration meter 11 installed on a mobile vehicle. The three-dimensional vibration sensor 17 is connected to the wireless vibration meter 11 via a data transmission line 27 through an integrated monitoring circuit. The wireless vibration meter 11 is wirelessly connected to the data acquisition module, and the data acquisition module is wirelessly connected to the monitoring cloud platform. The mobile vehicle is equipped with a horizontal telescopic pump 25 for pushing the three-dimensional vibration sensor 17 on the annular conveyor belt 16. In use, the horizontal telescopic pump 25 pushes the three-dimensional vibration sensor 17 in a directional manner toward the connecting channel 21. The three-dimensional vibration sensor 17 enters the connecting channel 21 through the outlet of the annular channel and passes through the inlet of the vertical channel 19 along the connecting channel 21 into the vertical channel 19. It then falls vertically along the vertical channel 19 to the drilling position of the drill bit 15.

[0034] During use, the mobile vehicle moves directionally along the preset laying line. The preset laying line is a continuously drilled trench between the vibration source and the protected object in the construction scenario of construction adjacent to sensitive buildings (structures) and hazardous equipment. Three-dimensional vibration sensors 17 are placed sequentially in the continuously drilled trench, thereby forming a vibration wave barrier, realizing the reflection, scattering and attenuation of vibration energy, effectively reducing the transmission efficiency of construction vibration to the protected object, and realizing vibration monitoring.

[0035] Before use, all three-dimensional vibration sensors 17 are placed in the annular channel of the mobile vehicle, with each sensor 17 positioned sequentially and spaced apart on the annular conveyor belt 16 within the channel. After placement, the mobile vehicle is started, moving along the preset laying path between the vibration source and the protected object. When the mobile vehicle reaches the preset trench location, the drill bit 15, which moves downwards along the vertical channel 19 on the mobile vehicle, is activated to drill a hole and create a trench. After drilling, all three-dimensional vibration sensors 17 are moved together via the annular conveyor belt 16. When the 17 is located in the connecting channel 21, the horizontal telescopic pump 25 is started. The horizontal telescopic pump 25 pushes the three-dimensional vibration sensor 17 in a directional manner toward the connecting channel 21, so that the three-dimensional vibration sensor 17 enters the connecting channel 21 through the outlet of the annular channel and passes through the inlet of the vertical channel 19 along the connecting channel 21 into the vertical channel 19. It then falls into the empty trench in the vertical direction of the vertical channel 19. After the three-dimensional vibration sensor 17 is automatically placed into the empty trench, the moving vehicle continues to move in the preset laying line direction and continuously drills holes along the path to form continuous empty trenches until all the three-dimensional vibration sensors 17 are placed into the empty trenches in sequence.

[0036] The vibration wave barrier in this invention is based on wave theory. When the energy generated during pile foundation construction propagates in the soil as stress waves, these stress waves are reflected and refracted when they encounter a medium interface (such as air and soil), thus consuming energy. Utilizing the cavity effect of continuous trenches constructed along a predetermined laying route, Rayleigh waves (surface waves) propagating there are forced to reflect, blocking the propagation path of the vibration waves and significantly reducing the vibration energy transmitted to the protected object. Combined with calculations of the construction safety distance, by optimizing the pile construction sequence (e.g., from near to far), and taking advantage of the physical characteristic that vibration naturally attenuates with increasing distance, the peak vibration velocity is further reduced.

[0037] After forming a vibration wave barrier, the mobile vehicle is positioned on one side of the barrier. All three-dimensional vibration sensors 17 are connected in series via signal cables to form an integrated monitoring loop. This integrated monitoring loop is then connected to a wireless vibration meter 11 mounted on the mobile vehicle via a data transmission line 27. The wireless vibration meter 11 is wirelessly connected to a data acquisition module, which in turn is wirelessly connected to a monitoring cloud platform. Therefore, this device is more intelligent, forming an integrated monitoring system comprised of three-dimensional vibration sensors 17, wireless vibration meter 11, data acquisition module, and monitoring cloud platform. The equipment has passed legal metrological verification, exhibiting high accuracy and strong anti-interference capabilities. It can achieve 24-hour uninterrupted automatic data acquisition, wireless transmission, and real-time analysis. The integrated monitoring system operates stably, providing continuous and accurate data, unaffected by weather, location, or human factors. It solves the problems of low frequency, data lag, and large errors associated with traditional manual monitoring, resulting in a low long-term failure rate and reliable monitoring results.

[0038] In this embodiment, the mobile vehicle body includes a chassis 2 and a monitoring box 1 installed on the chassis 2. The monitoring box 1 and the chassis 2 are connected by a support frame 7. The monitoring box 1 has a receiving chamber. The chassis 2 has a drive structure for driving the annular transmission belt. The bottom front end of the chassis 2 is provided with a drive wheel 9 for moving the mobile vehicle body. Rollers 8 are rotatably connected to both sides of the bottom rear end of the chassis 2.

[0039] The monitoring box has ventilation holes 5 on its side that communicate with the receiving chamber. The monitoring box 1 is connected to the chassis 2 by a support frame 7, and the top of the support frame 7 is connected to the bottom of the monitoring box 1, and the bottom of the support frame 7 is connected to the top of the chassis 2 by bolts and nuts. This connection method ensures that the monitoring box 1 and the chassis 2 are firmly connected, and that the moving vehicle is driven by the drive wheels 9 and the rollers 8 play a role in auxiliary support and steering. The monitoring box 1 will not easily shake or detach from the chassis 2, thus ensuring the stability of the monitoring equipment and providing a foundation for accurate monitoring. At the same time, the receiving chamber inside the monitoring box 1 can hold all the three-dimensional vibration sensors 17, providing a relatively stable and safe environment for all the three-dimensional vibration sensors 17, reducing the interference of external factors on the sensors, and helping to improve the service life of the sensors and the accuracy of the monitoring data. The circular conveyor belt 16 can carry all the three-dimensional vibration sensors 17 and operate normally according to the design requirements, providing power support for the transportation of all the three-dimensional vibration sensors 17, and meeting the requirement of placing the three-dimensional vibration sensors 17 into the trench along the preset laying line.

[0040] Both the front and rear ends of the chassis 2 are embedded with anti-collision strips 10, which can protect the chassis 2 during the directional movement of the moving vehicle body.

[0041] In this embodiment, the drive structure includes a frame located inside the chassis 2, and a drive sprocket and a driven sprocket are rotatably connected inside the frame and on both sides of the annular transmission belt, respectively. The annular channel is provided with an annular guide rail that is annular and carries the annular conveyor belt 16.

[0042] The annular conveyor belt 16 is a toothed chain plate type annular chain. The toothed chain plate type annular chain is placed in the annular guide rail and cooperates with the annular guide rail. The toothed chain plate type annular chain meshes with the driving sprocket and the driven sprocket respectively. The driving sprocket is coaxially connected to the drive motor I mounted on the frame.

[0043] The frame is housed within the chassis 2, which has observation holes 6 for viewing the drive structure. The drive sprocket and driven sprocket are located within the frame and on either side of the annular conveyor belt 16. This layout makes the entire drive structure compact, fully utilizing the space within the chassis 2 and reducing the equipment's footprint, which is beneficial for installation and use in limited spaces. The annular conveyor belt 16 is located within the annular channel of the monitoring box 1, and an annular guide rail within the annular channel supports the conveyor belt 16. The annular guide rail provides stable support and a running track for the annular conveyor belt 16, effectively preventing deviation or shaking during operation and ensuring the stability and reliability of the conveyor belt 16's operation.

[0044] Meanwhile, the annular conveyor belt 16 adopts a toothed chain plate type annular chain, which meshes with the driving sprocket and the driven sprocket. The toothed design of the toothed chain plate type annular chain makes the meshing between the chain 94 and the sprocket more precise, accurately transmitting power, reducing slippage during transmission, improving transmission efficiency and accuracy, and ensuring the normal operation of the equipment. The drive motor I is a micro servo motor with good control performance, which can precisely control the speed and direction of the driving sprocket, thereby realizing flexible adjustment of the running speed and direction of the annular conveyor belt 16 to meet different working requirements.

[0045] In this embodiment, a mounting cylinder 18 extending upward toward the accommodating cavity is provided at the middle position of the chassis 2. The bottom of the mounting cylinder 18 passes through the chassis 2 and extends downward. A drilling column 20 extending along the height direction of the monitoring box 1 is fixedly installed inside the mounting cylinder 18. A vertical channel 19 penetrating the bottom of the chassis 2 is formed inside the drilling column 20. A rotary motor is installed at the top of the monitoring box 1 and located in the vertical channel 19. The output shaft of the rotary motor is coaxially connected to a rotating shaft 12 extending downward along the vertical channel 19. A vertical telescopic pump 13 is fixedly connected to the bottom of the rotating shaft 12. The vertical telescopic shaft 14 of the vertical telescopic pump 13 is fixedly connected to the drill bit 15.

[0046] The mounting cylinder 18 provides a stable mounting base for the lower part of the drilling column 20, while also increasing the weight of the lower part of the drilling column 20 to ensure stability when the drill bit 15 is drilling. In use, the vertical telescopic pump 13 is started to drive the vertical telescopic shaft 14 to move downward along the vertical channel 19 of the drilling column 20. During the movement, the rotary motor is started simultaneously. The rotary motor drives the rotary shaft 12 to rotate, so that the rotary shaft 12 drives the vertical telescopic pump 13, the vertical telescopic shaft 14 and the drill bit 15 to rotate synchronously. As the drill bit 15 rotates and moves downward, it comes into contact with the ground on the preset laying line, and uses the downward rotational force of the drill bit 15 to drill a hole in the ground to form a micro trench, which meets the positioning requirements of the three-dimensional vibration sensor 17 placed in the trench.

[0047] When powered on, the mobile vehicle can be stopped at the drilling position, and the drill bit 15 on the top of the mobile vehicle can be moved to the drilling position to start drilling. After drilling is completed, the three-dimensional vibration sensor 17 is pushed in the direction of the connecting channel 21 by the horizontal telescopic pump 25. The three-dimensional vibration sensor 17 enters the connecting channel 21 through the outlet of the annular channel and enters the vertical channel 19 through the inlet of the vertical channel 19. It falls vertically into the drilling position of the drill bit 15. Since the position of the vertical channel 19 corresponds to the position of the drilling, the three-dimensional vibration sensor 17 can fall into the groove formed by the drilling of the drill bit 15.

[0048] In this embodiment, a connecting frame 91 is fixed to the bottom front end of the chassis 2 by bolts and nuts. The connecting frame 91 is mounted on the drive wheel 9. The two sides of the connecting frame 91 are respectively provided with lugs extending toward the drive wheel 9. The drive wheel 9 is rotatably connected to the lugs through a rotating shaft 95. A drive motor II 92 is fixed on the connecting frame 91. A main gear is fixed on the output shaft of the drive motor II 92. A driven gear is sleeved on the rotating shaft 95 between the lugs and the drive wheel 9. A chain 94 is wound between the main gear and the driven gear.

[0049] A drive motor II 92 is fixed on the connecting frame 91. To ensure the installation stability of the drive motor II 92, several protective rods 93 are provided on the connecting frame 91 and wrapped around the drive motor II 92. A main gear is fixed on the output shaft of the drive motor II 92. A driven gear is fitted on the rotating shaft 95 between the support lug and the drive wheel 9. A chain 94 is wound between the main gear and the driven gear. The main gear on the output shaft of the drive motor II 92 and the driven gear on the rotating shaft 95 are transmitted through the chain 94, which effectively transmits the power of the motor to the drive wheel 9, realizing the smooth transmission of power. This allows the drive wheel 9 to drive the two rollers 8 at the rear end of the entire mobile vehicle to move together along the preset laying path.

[0050] In this embodiment, a brake housing coaxially arranged with the drive wheel 9 is mounted on the connecting frame 91. The drive wheel 9 has a hub chamber for braking. A brake hub 96 coaxially arranged with the drive wheel 9 is provided in the hub chamber. The brake hub 96 is connected to the rotating shaft 95 via a spline. An electromagnetic brake is provided in the brake hub 96. Several guide posts extending towards the drive wheel 9 are evenly distributed along the circumferential direction of the brake hub 96. The two ends of each guide post are fixedly connected to the outer surface of the brake hub 96 and the inner surface of the drive wheel 9, respectively. A cylindrical spiral brake spring 97 is sleeved on the guide post. One end of the brake spring 97 presses against the positioning end face of the fixed brake housing, and the other end presses against an armature that can move axially and is located in the brake chamber. An electromagnetic coil is embedded in the annular groove inside the brake housing. The electromagnetic coil is arranged coaxially with the armature. A friction brake disc is provided between the armature and the brake hub 96. The friction brake disc rotates synchronously with the brake hub 96.

[0051] The brake housing is coaxially mounted with the drive wheel 9, and the brake hub 96 is also coaxial with the drive wheel 9 and the rotating shaft 95. This makes the entire braking system more compact and improves the precision of the fit between components. The coaxial arrangement reduces additional wear and vibration caused by misalignment, ensuring the stability and reliability of the braking process and improving braking efficiency. Brake springs 97 are fitted onto guide posts evenly distributed around the drive wheel hub. One end of the brake spring 97 presses against the positioning end face of the brake housing, and the other end presses against the armature. This arrangement allows the brake spring 97 to act as a buffer during braking, reducing the impact force. After braking, the brake spring 97 provides a restoring force to the armature, allowing the braking system to quickly return to its initial state and prepare for the next braking operation.

[0052] When the vehicle body needs to stop moving, the drive motor II 92 is turned off, and the electromagnetic coil is energized or de-energized. When energized, the electromagnetic coil generates a magnetic field that attracts the armature, causing the armature to contact the friction brake disc, thus achieving braking and locking the drive wheel 9. When de-energized, the magnetic field disappears, and the armature resets under the action of the brake spring 97, releasing the brake. At the same time, the friction brake disc and the brake hub 96 rotate synchronously. When the armature is attracted and squeezes the friction brake disc, it can directly generate braking force on the brake hub 96, thereby braking the drive wheel 9 and the rotating shaft 95 coaxially connected to it. This synchronous braking design ensures the timeliness and accuracy of braking, effectively improving braking performance, so that the vehicle body can move along the preset laying path direction, and all three-dimensional vibration sensors 17 are placed on the preset laying path according to the above operation.

[0053] In this embodiment, an infrared sensor is installed at the end of the connecting channel 21 facing the outlet of the annular channel. The infrared sensor is used to detect the position of the three-dimensional vibration sensor 17 when it reaches the connecting channel 21, and sends a detection signal to the microprocessor so that the microprocessor controls the opening and closing of the horizontal telescopic pump 25. The position of the horizontal telescopic pump 25 corresponds to the position of the connecting channel 21. The horizontal telescopic pump 25 is installed on the fixed frame 23 set in the receiving chamber. The output shaft of the horizontal telescopic pump 25 is coaxially connected to a horizontal telescopic rod that extends and retracts toward the connecting channel 21. A support sleeve 24 is sleeved on one end of the horizontal telescopic rod. The support sleeve 24 is connected to the fixed frame 23 through a connecting rod. The other end of the horizontal telescopic rod is fixedly connected to the push head 26. A soft rubber body 22 is fixed to the end of the push head 26 away from the horizontal telescopic rod.

[0054] An infrared sensor is installed at the end of the connecting channel 21 facing the outlet of the annular channel. Its function is to detect the position of the three-dimensional vibration sensor 17 when it reaches the connecting channel 21. When the three-dimensional vibration sensor 17 reaches a specific position, the infrared sensor can sense it and generate a detection signal. The infrared sensor sends the detection signal to the microprocessor, which controls the opening and closing of the horizontal telescopic pump 25 based on the received signal. The horizontal telescopic pump 25 is mounted on the fixed frame 23 in the receiving chamber, and its position corresponds to the connecting channel 21. The output shaft of the horizontal telescopic pump 25 is coaxially connected to the horizontal telescopic rod. When the horizontal telescopic pump 25 starts, the output shaft drives the horizontal telescopic rod to telescopically move towards the connecting channel 21. One end of the horizontal telescopic rod is fitted with a support sleeve 24, which is connected to the fixed frame 23 via a connecting rod. This structure stabilizes the horizontal telescopic rod. The other end of the horizontal telescopic rod is fixedly connected to the push head 26. A soft rubber body 22 is fixed to the end of the push head 26 facing away from the horizontal telescopic rod. The soft rubber body 22 can buffer and protect the rod during the pushing process.

[0055] Because an infrared sensor is installed at the end of the connecting channel 21 facing the outlet of the annular channel, the infrared sensor is used to detect the position of the three-dimensional vibration sensor 17 when it reaches the connecting channel 21, and sends a detection signal to the microprocessor so that the microprocessor controls the opening and closing of the horizontal telescopic pump 25. When the three-dimensional vibration sensor 17 reaches a specific position, the infrared sensor can sense it and generate a detection signal. The infrared sensor sends the detection signal to the microprocessor, and the microprocessor controls the opening and closing of the horizontal telescopic pump 25 according to the received signal. The start of the horizontal telescopic pump 25 can push the three-dimensional vibration sensor 17 through the outlet of the annular channel into the connecting channel 21 and along the connecting channel 21 through the inlet of the vertical channel 19 into the vertical channel 19, and fall vertically along the vertical channel 19 to the drilling position of the drill bit 15.

[0056] In this embodiment, a guide sensor 4 and a positioning sensor are also included. The guide sensor 4 is installed at the front end of the monitoring box 1 and is used to detect the relative position deviation between the moving vehicle and the preset laying line in real time and output a correction signal. The correction signal is sent to the microprocessor, and the microprocessor issues an instruction to control the drive motor II 92 to start and stop. The positioning sensor is installed at the bottom of the mounting cylinder 18 and is used to detect the position of the moving vehicle and the preset point on the preset laying line in real time and output a positioning signal. The positioning signal is sent to the microprocessor, and the microprocessor issues an instruction to control the vertical telescopic pump 13 and the rotary motor to start and stop together. The length of the vertical telescopic shaft 14 of the vertical telescopic pump 13 is the depth of the drill hole trench drilled by the drill bit 15.

[0057] A guide sensor 4, installed at the front end of the monitoring box 1, can detect the relative positional deviation between the moving vehicle and the preset laying line in real time and output a correction signal. The microprocessor controls the start and stop of the drive motor II 92 based on this signal, enabling the moving vehicle to correct its travel deviation in a timely manner and always move along the preset laying line. This ensures the accuracy of the moving vehicle's running path, avoids affecting subsequent work due to deviation from the line, improves the stability and reliability of the work, and ensures that the entire operation proceeds according to the predetermined plan. Simultaneously, a positioning sensor, installed at the bottom of the mounting cylinder 18, can detect the positional correspondence between the moving vehicle and the preset points on the preset laying line in real time and output a positioning signal. The microprocessor controls the start and stop of the vertical telescopic pump 13 and the rotary motor based on this positioning signal. This allows the moving vehicle to accurately trigger the relevant equipment actions when it reaches the preset point, ensuring that drilling and other operations are performed precisely at the predetermined position, effectively improving work accuracy and avoiding work errors caused by positional errors.

[0058] In this embodiment, a proximity switch is installed on the output shaft of the vertical telescopic pump 13 to detect the retraction state of the vertical telescopic shaft 14 and output a switching signal. The switching signal is sent to the microprocessor, and the microprocessor receives the detection signal from the infrared sensor. The microprocessor issues a command to control the opening and closing of the horizontal telescopic pump 25, which pushes the three-dimensional vibration sensor 17 on the annular conveyor belt 16 corresponding to the connecting channel 21 into the vertical channel 19 and falls into the empty trench after drilling.

[0059] A proximity switch mounted on the output shaft of the vertical telescopic pump 13 accurately detects the retraction state of the vertical telescopic rod and converts it into a switching signal output. This precise detection provides reliable and accurate basic data for subsequent equipment control, ensuring that the entire system can respond based on the actual state of the telescopic rod. Simultaneously, the microprocessor receives both the switching signal from the proximity switch and the detection signal from the infrared sensor. By synchronously processing these two different types of detection signals, the microprocessor can comprehensively analyze the operating status of the equipment, gain a more comprehensive understanding of the working environment and equipment status, and provide accurate basis for issuing subsequent control commands.

[0060] In this embodiment, the wireless vibration meter 11 is mounted on the drive cover 3 fitted on the rotary motor. The internal space of the drive cover 3 is connected to the receiving chamber of the monitoring box 1. The data transmission line 27 of the wireless vibration meter 11 passes through the top of the monitoring box 1 and extends into the receiving chamber, so that the data transmission line 27 is connected to the three-dimensional vibration sensor 17 connected in series.

[0061] The wireless vibration meter 11 is mounted on the drive cover 3 of the rotating motor, placing it at the highest point of the moving vehicle. This facilitates the wireless transmission of collected data to the data acquisition module wirelessly. Simultaneously, the internal space of the drive cover 3 is connected to the receiving chamber of the monitoring box 1. The data transmission line 27 of the wireless vibration meter 11 extends through the top of the monitoring box 1 into the receiving chamber. As the data transmission line 27 passes through the monitoring box 1, the upper half of the line is secured to the monitoring box 1 by a fixing nut 28. This design provides a stable and continuous channel for data transmission. The connected space prevents interference from external environmental factors (such as dust, moisture, and mechanical impact) on the data transmission line 27, ensuring that the data collected by the wireless vibration meter 11 can be accurately and smoothly transmitted to the monitoring box 1 and connected to the wireless vibration sensor, thus guaranteeing the reliability of data transmission.

[0062] The three-dimensional vibration sensor 17 adopts a piezoelectric triaxial vibration sensor, and the wireless vibration meter 11 adopts the TC-4850N wireless vibration meter 11 to realize the 24-hour uninterrupted automatic acquisition of the peak vibration velocity in the X / Y / Z directions; the data is transmitted remotely through the 4G / 5G wireless network, which solves the problems of difficult wiring, signal interference, and data lag in complex construction environments. It has high monitoring accuracy, continuous and reliable data, and strong anti-interference ability.

[0063] The data acquisition module adopts the South Surveying and Mapping IControl-S acquisition module, which is a relatively universal measurement data acquisition device. It can acquire a wide range of sensor output signals, and can automatically acquire data in single or multi-unit network configurations. It can adapt to the climate environment of the engineering site and has rainproof, lightning protection, and anti-interference performance. Its main functions include measurement data storage, timed acquisition, offline acquisition, and computer communication.

[0064] The guide sensor 4 uses Manplus: MPMGS201-F01, the positioning sensor uses Beidou positioning sensor, and the data from the guide sensor 4 and the positioning sensor are also transmitted to the data acquisition module. The infrared sensor uses an active infrared sensor, and the proximity switch uses Schneider: XS618B1MAL2. The drive motor II92 uses a 42 stepper motor (NEMA17), and the drive motor I uses EC25 miniature DC servo motors.

[0065] The system employs an integrated monitoring system consisting of 17 three-dimensional vibration sensors, 11 wireless vibration meters, a data acquisition module, and a cloud platform. The equipment has passed legal metrological verification, boasts high accuracy and strong anti-interference capabilities, and can achieve 24 / 7 uninterrupted automatic data acquisition, wireless transmission, and real-time analysis. The system operates stably, providing continuous and accurate data, unaffected by weather, site conditions, or human factors. It solves the problems of low frequency, data lag, and large errors associated with traditional manual monitoring, exhibiting a low failure rate and reliable monitoring results over long-term operation.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A monitoring device for vibration during pile foundation construction, characterized in that: include: The mobile vehicle body can move directionally along a preset laying route. The mobile vehicle body has a vertical channel extending along the height direction and penetrating the mobile vehicle body. The top of the mobile vehicle body is equipped with a drill bit that can move up and down along the vertical channel. The mobile vehicle body has an annular channel surrounding the vertical channel. The annular channel and the vertical channel are connected by a connecting channel. An annular conveyor belt that moves along an annular path is provided in the annular channel. The annular conveyor belt is provided with a number of three-dimensional vibration sensors arranged at intervals along its annular path. The number of three-dimensional vibration sensors are connected in series through signal cables to form an integrated monitoring loop. The data acquisition system includes a data acquisition module and a wireless vibration meter installed on a mobile vehicle. The three-dimensional vibration sensor is connected to the wireless vibration meter via an integrated monitoring circuit through a data transmission line. The wireless vibration meter is connected to the data acquisition module wirelessly, and the data acquisition module is connected to the monitoring cloud platform wirelessly. The mobile vehicle is equipped with a horizontal telescopic pump for pushing the three-dimensional vibration sensor on the annular conveyor belt. In use, the horizontal telescopic pump pushes the three-dimensional vibration sensor in a directional manner toward the connecting channel. The three-dimensional vibration sensor enters the connecting channel through the outlet of the annular channel and passes through the inlet of the vertical channel to enter the vertical channel. It then falls vertically into the drilling position of the drill bit.

2. The monitoring device for vibration monitoring during pile foundation construction according to claim 1, characterized in that: The mobile vehicle body includes a chassis and a monitoring box mounted on the chassis. A support frame connects the monitoring box and the chassis. The monitoring box has a receiving chamber. The chassis has a drive structure for driving the annular transmission belt. The bottom front end of the chassis has a drive wheel for moving the mobile vehicle body. Rollers are rotatably connected to both sides of the bottom rear end of the chassis.

3. The monitoring device for vibration monitoring during pile foundation construction according to claim 2, characterized in that: The drive structure includes a frame located inside the chassis, with a drive sprocket and a driven sprocket rotatably connected to both sides of the annular transmission belt inside the frame, and an annular guide rail that is annular and carries the annular conveyor belt is provided inside the annular channel. The annular conveyor belt is a toothed chain plate type annular chain. The toothed chain plate type annular chain is placed in the annular guide rail and cooperates with the annular guide rail. The toothed chain plate type annular chain meshes with the driving sprocket and the driven sprocket respectively. The driving sprocket is coaxially connected to a drive motor I mounted on the frame.

4. The monitoring device for vibration monitoring during pile foundation construction according to claim 2, characterized in that: The chassis has an upward-extending mounting cylinder at its center, which extends toward the receiving chamber. The bottom of the mounting cylinder passes through the chassis and extends downward. A drilling column extending along the height of the monitoring box is fixedly installed inside the mounting cylinder. A vertical channel penetrating the bottom of the chassis is formed inside the drilling column. A rotary motor is installed at the top of the monitoring box and within the vertical channel. The output shaft of the rotary motor is coaxially connected to a rotating shaft extending downward along the vertical channel. A vertical telescopic pump is fixedly connected to the bottom of the rotating shaft. The vertical telescopic shaft of the vertical telescopic pump is fixedly connected to the drill bit.

5. The monitoring device for vibration during pile foundation construction according to claim 2, characterized in that: The bottom front end of the chassis is fixed with a connecting frame by bolts and nuts. The connecting frame is mounted on the drive wheel. The two sides of the connecting frame are respectively provided with lugs extending towards the drive wheel. The drive wheel is rotatably connected to the lugs through a rotating shaft. A drive motor II is fixed on the connecting frame. A main gear is fixed on the output shaft of the drive motor II. A driven gear is sleeved on the rotating shaft between the lugs and the drive wheel. A chain is wound between the main gear and the driven gear.

6. The monitoring device for vibration during pile foundation construction according to claim 5, characterized in that: A brake housing coaxially arranged with the drive wheel is mounted on the connecting frame. The drive wheel has a hub chamber for braking, and a brake hub coaxially arranged with the drive wheel is located in the hub chamber. The brake hub is connected to the rotating shaft via a spline. An electromagnetic brake is installed in the brake hub. Several guide posts extending towards the drive wheel are evenly distributed along the circumferential direction of the brake hub. The two ends of each guide post are fixedly connected to the outer surface of the brake hub and the inner surface of the drive wheel, respectively. A cylindrical helical brake spring is sleeved on the guide post. One end of the brake spring presses against the positioning end face of the fixed brake housing, and the other end presses against an armature that can move axially and is located in the brake chamber. An electromagnetic coil is embedded in an annular groove inside the brake housing. The electromagnetic coil is arranged coaxially with the armature. A friction brake disc is arranged between the armature and the brake hub. The friction brake disc rotates synchronously with the brake hub.

7. The monitoring device for vibration monitoring during pile foundation construction according to claim 4, characterized in that: An infrared sensor is installed at the end of the connecting channel facing the outlet of the annular channel. The infrared sensor is used to detect the position of the three-dimensional vibration sensor reaching the connecting channel and send a detection signal to the microprocessor so that the microprocessor controls the opening and closing of the horizontal telescopic pump. The position of the horizontal telescopic pump corresponds to the position of the connecting channel. The horizontal telescopic pump is mounted on a fixed frame set in the receiving chamber. The output shaft of the horizontal telescopic pump is coaxially connected to a horizontal telescopic rod that extends and retracts toward the connecting channel. A support sleeve is fitted on one end of the horizontal telescopic rod. The support sleeve is connected to the fixed frame through a connecting rod. The other end of the horizontal telescopic rod is fixedly connected to a push head. A soft rubber body is fixed to the end of the push head away from the horizontal telescopic rod.

8. The monitoring device for vibration monitoring during pile foundation construction according to claim 7, characterized in that: It also includes a guide sensor and a positioning sensor. The guide sensor is installed at the front end of the monitoring box and is used to detect the relative positional deviation between the moving vehicle and the preset laying line in real time and output a correction signal. The correction signal is sent to the microprocessor, which issues a command to control the start and stop of the drive motor II. The positioning sensor is installed at the bottom of the mounting cylinder and is used to detect the positional correspondence between the moving vehicle and the preset point on the preset laying line in real time and output a positioning signal. The positioning signal is sent to the microprocessor, which issues a command to control the start and stop of the vertical telescopic pump and the rotary motor together. The length of the vertical telescopic shaft of the vertical telescopic pump is the depth of the drill hole trench.

9. The monitoring device for vibration during pile foundation construction according to claim 8, characterized in that: A proximity switch is installed on the output shaft of the vertical telescopic pump to detect the retraction state of the vertical telescopic shaft and output a switching signal. The switching signal is sent to the microprocessor, which simultaneously receives the detection signal from the infrared sensor. The microprocessor issues a command to control the opening and closing of the horizontal telescopic pump, which pushes the three-dimensional vibration sensor on the corresponding connecting channel of the annular conveyor belt into the vertical channel and into the empty trench after drilling.

10. The monitoring device for vibration during pile foundation construction according to claim 4, characterized in that: The wireless vibration meter is mounted on a drive cover fitted onto a rotating motor. The internal space of the drive cover is connected to the receiving chamber of the monitoring box. The data transmission line of the wireless vibration meter passes through the top of the monitoring box and extends into the receiving chamber, connecting the data transmission line to a series-connected three-dimensional vibration sensor.

Images