Offshore soft soil site settlement monitoring device

Abstract

The utility model discloses an offshore soft soil site settlement monitoring device, which comprises an unmanned aerial vehicle, a monitoring box arranged on the unmanned aerial vehicle and a graduated scale arranged at a fixed position of a site, a data acquisition mechanism is arranged in the monitoring box, and the data acquisition mechanism comprises a mounting base fixedly connected to the top wall in the monitoring box. The camera is fixedly connected to the front side of the mounting base, the attitude sensor is fixedly connected to the bottom of the mounting base, and the laser range finders are fixedly connected to the front side and the bottom of the mounting base. According to the utility model, data information between the unmanned aerial vehicle and the installation position of the graduated scale is acquired through the camera, the attitude sensor and the laser range finder, and the settlement condition of the ground below the unmanned aerial vehicle is calculated by using a formula, so that the settlement value of any point and any moment in a site relative to the installation position of the graduated scale in the site, namely a fixed point, is efficiently and accurately obtained; compared with a traditional monitoring method, manpower and material resources are greatly saved.

Description

Technical Field

[0001] This utility model relates to the field of settlement monitoring technology, and in particular to a settlement monitoring device for nearshore soft soil sites. Background Technology

[0002] With the rapid development of infrastructure construction across the country, land resources are becoming increasingly scarce. To address this problem, large-scale land reclamation projects have been carried out in coastal areas of my country. The soft soil formed by land reclamation is characterized by high compressibility, high natural water content, low permeability, and high void ratio, and exhibits significant creep characteristics under load. Creep in soft soil can cause differential settlement of building pile foundations. If the displacement is too large, it may damage the substructure of the building and affect the normal use of the superstructure, seriously threatening the normal functioning of the building.

[0003] Currently, traditional leveling instruments are mostly used to monitor site settlement. This method is inefficient and cannot reflect ground settlement in a timely manner. Therefore, we need a device that can efficiently monitor site settlement in real time, so as to better ensure the safe use of buildings.

[0004] A device and method for measuring bridge pier settlement in tidal flat areas, disclosed in Chinese patent document CN117330021A, includes a drone platform, a height measurement mechanism, an intelligent tripod, and a central controller. The height measurement mechanism, mounted on the drone platform, is used to observe known elevation control points and settlement observation points. The intelligent tripod is positioned below the drone platform. The central controller communicates with the intelligent tripod and the height measurement mechanism, controlling the intelligent tripod to level the drone platform and issuing commands to the height measurement mechanism for observation. This method addresses the problems of low accuracy and efficiency in existing technologies using leveling or trigonometric leveling methods for bridge pier settlement measurement in tidal flat areas, which are hampered by the large tidal flat area, difficult personnel movement, and loose soil, resulting in challenging station setup. However, this method requires setting up the drone platform far from the bridge pier, which is difficult to install and occupies space beyond the bridge pier area, hindering long-term monitoring.

[0005] To address the shortcomings of the existing technologies, providing a settlement monitoring device for nearshore soft soil sites is a problem worthy of further research. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of traditional level instruments used to monitor site settlement, which are inefficient and cannot reflect ground settlement in a timely manner. This invention provides a settlement monitoring device for nearshore soft soil sites, achieving the technical effect of high efficiency and saving manpower and material resources.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A nearshore soft soil site settlement monitoring device includes a drone, a monitoring box mounted on the drone, and a scale mounted at a fixed position on the site. The drone has a support mechanism at its bottom, and the monitoring box has a data acquisition mechanism inside.

[0009] The data acquisition mechanism includes a mounting base fixedly connected to the top wall inside the monitoring box, a camera fixedly connected to the front of the mounting base, an attitude sensor fixedly connected to the bottom of the mounting base, and a laser rangefinder fixedly connected to the front and bottom of the mounting base. The attitude sensor can output the three-dimensional attitude data of the UAV in real time, including roll angle, pitch angle, etc., to ensure the stability and accuracy of the UAV during flight.

[0010] Monitoring holes are provided on the front and bottom of the monitoring box. The positions of the monitoring holes correspond to the positions of the camera and the laser rangefinder, respectively. By setting monitoring holes on the monitoring box, the camera and the laser rangefinder can take pictures of the external situation of the monitoring box and perform laser ranging, thereby realizing the positioning of the drone itself.

[0011] The mounting base is equipped with mounting screws on the front and bottom. The mounting base is connected to the camera, attitude sensor and laser rangefinder respectively by the mounting screws. The mounting base can be used to independently disassemble and install some monitoring devices as needed.

[0012] The top of the monitoring box is equipped with a slide rail, which is slidably connected to the drone. The slide rail is set to be electric, so that the position of the monitoring box can be slidably adjusted as needed when monitoring land subsidence, thereby improving the accuracy of land subsidence monitoring.

[0013] The support mechanism includes a telescopic rod fixedly connected to the bottom of the drone, and a buffer pad fixedly connected to the bottom of the telescopic rod;

[0014] The telescopic pole is an electric telescopic pole.

[0015] A method for monitoring settlement of nearshore soft soil sites includes the following steps:

[0016] Step 1: When the drone is hovering, the laser rangefinder simultaneously emits lasers towards the scale and the ground. The two laser rangefinders measure the distance L from the drone's hovering point to the scale and the distance H2 from the ground, respectively, and automatically upload the data to the cloud.

[0017] Step 2: The camera reads the scale value H1 of the laser rangefinder on the ruler and uploads it to the cloud;

[0018] Step 3: The distance between the front-end laser rangefinder and the bottom of the mounting base is h1, and the angle between the attitude sensor at the hovering point and the horizontal plane is θ.

[0019] Step 4: Based on the data from Steps 1 to 3, calculate the horizontal distance l = Lcosθ between the drone hovering point and the scale installation position, and the settlement of any point on the site at any time relative to the scale position.

[0020] s = H1 - h1 - H2cosθ - Lsinθ, where a negative value represents the subsidence of the ground below the drone hovering point relative to the stationary point, and a positive value represents the bulge of the ground below the drone hovering point relative to the stationary point. This allows for the monitoring of ground subsidence below the drone, efficiently and accurately obtaining the subsidence value of any point on the site at any time relative to the stationary point where the scale is installed.

[0021] Positive and beneficial effects:

[0022] 1. This nearshore soft soil site settlement monitoring device collects data information between the drone and the installation position of the scale ruler through a camera, attitude sensor and laser rangefinder, and calculates the settlement of the ground below the drone using a formula. It efficiently and accurately obtains the settlement value of any point in the site at any time compared with the installation position of the scale ruler in the site, i.e., the fixed point. Compared with traditional monitoring methods, it greatly saves manpower and material resources.

[0023] 2. This nearshore soft soil settlement monitoring device uses mounting screws to assemble the mounting base with the camera, attitude sensor and laser rangefinder, allowing the mounting base to be independently disassembled and installed as needed.

[0024] 3. The nearshore soft soil settlement monitoring device has a sliding rail between the drone and the monitoring box, which allows the monitoring box to be assembled with the drone. When the monitoring device is no longer needed, the monitoring box can slide on the sliding rail and detach from the drone, thus completing the disassembly of the monitoring device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the forward and backward retraction structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the data acquisition mechanism of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the mounting base of this utility model;

[0028] Figure 4 This is a schematic diagram of the telescopic rod of this utility model.

[0029] In the diagram: 1-Drone, 2-Monitoring box, 3-Scale, 4-Mounting base, 5-Camera, 6-Attitude sensor, 7-Laser rangefinder, 8-Monitoring hole, 9-Mounting screw, 10-Slide rail, 11-Telescopic rod, 12-Buffer pad. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] Example 1

[0032] like Figures 1 to 4 As shown, a nearshore soft soil site settlement monitoring device includes a drone 1, a monitoring box 2 mounted on the drone 1, and a scale 3 mounted at a fixed position on the site. The bottom of the drone 1 is equipped with a support mechanism, and the monitoring box 2 is equipped with a data acquisition mechanism inside.

[0033] like Figures 1 to 2 As shown, the data acquisition mechanism includes a mounting base 4 fixedly connected to the top wall inside the monitoring box 2, a camera 5 fixedly connected to the front side of the mounting base 4, an attitude sensor 6 fixedly connected to the bottom of the mounting base 4, and a laser rangefinder 7 fixedly connected to the front and bottom of the mounting base 4. By setting up the camera 5, attitude sensor 6, and laser rangefinder 7 inside the monitoring box 2, the images captured by the camera can be used to create 3D topographic maps, 3D modeling of geological profiles, etc., providing more intuitive information for settlement analysis. The laser rangefinder can very accurately measure the elevation changes of the ground or buildings, thereby determining whether there is a settlement phenomenon. The attitude sensor can output the three-dimensional attitude data of the UAV in real time, including roll angle, pitch angle, etc., to ensure the stability and accuracy of the UAV during flight.

[0034] like Figures 1 to 2 As shown, monitoring holes 8 are provided on the front and bottom of the monitoring box 2. The positions of the monitoring holes 8 correspond to the positions of the camera 5 and the laser rangefinder 7, respectively. By setting the monitoring holes 8 on the monitoring box 2, the camera 5 and the laser rangefinder 7 can take pictures of the external situation of the monitoring box 2 and perform laser ranging, thereby realizing the positioning of the drone itself, and calculating the settlement of the monitoring position based on the information read by the two on the scale 3.

[0035] Furthermore, a servo motor-driven baffle is installed inside the monitoring hole 8. The shape of the baffle is adapted to the shape of the monitoring hole 8. When monitoring is not required, the baffle is rotated to overlap with the monitoring hole 8, so that the monitoring box 2 is completely closed, which protects the internal camera, attitude sensor and laser rangefinder, and prevents the internal equipment of the monitoring box 2 from being damaged during storage. When the equipment is required to perform monitoring work, the servo motor drives the baffle to rotate and open the monitoring hole 8, so that the camera 5 and the laser rangefinder 7 can collect external information to complete the settlement monitoring.

[0036] like Figures 2 to 3 As shown, mounting screws 9 are provided on the front and bottom of the mounting base 4. The mounting base 4 is assembled and connected to the camera 5, attitude sensor 6 and laser rangefinder 7 respectively by the mounting screws 9. By setting the mounting screws 9 on the mounting base 4, the mounting base 4 is assembled with the camera 5, attitude sensor 6 and laser rangefinder 7. This allows the mounting base 4 to autonomously disassemble and install some monitoring equipment as needed, change the model of the monitoring equipment according to the needs of the monitoring environment, or increase the number of some detection equipment to improve the monitoring accuracy. The device can autonomously disassemble the detection equipment to adapt to diverse monitoring needs.

[0037] Example 2

[0038] like Figure 3 As shown, the top of the monitoring box 2 is provided with a slide rail 10. The monitoring box 2 is slidably connected to the drone 1 through the slide rail 10. By setting the slide rail 10 between the drone 1 and the monitoring box 2, the monitoring box 2 can be assembled with the drone 1 to complete the installation. When the monitoring device is not needed, the monitoring box 2 can be slid on the slide rail and then detached from the drone 1 to complete the disassembly of the monitoring device.

[0039] Furthermore, by setting the slide rail 10 as an electric slide rail, the position of the monitoring box 2 can be adjusted as needed during land settlement monitoring, thereby improving the accuracy of land settlement monitoring.

[0040] Example 3

[0041] like Figure 4 As shown, the support mechanism includes a telescopic rod 11 fixedly connected to the bottom of the UAV 1, and a buffer pad 12 fixedly connected to the bottom of the telescopic rod 11.

[0042] The telescopic pole 11 is an electric telescopic pole. By setting the telescopic pole 11 and the buffer pad 12 at the bottom of the drone 1, the two support the drone when it lands. When the drone takes off, the telescopic pole 11 retracts to avoid affecting the detection work of the monitoring equipment. When the drone lands, the bottom height of the buffer pad 12 is lower than the bottom height of the monitoring box 2 when the telescopic pole 11 extends, so as to avoid the monitoring box 2 from contacting the ground and causing wear.

[0043] A method for monitoring settlement of nearshore soft soil sites includes the following steps:

[0044] Step 1: When the drone is hovering, the laser rangefinder simultaneously emits lasers towards the scale and the ground. The two laser rangefinders measure the distance L from the drone's hovering point to the scale and the distance H2 from the ground, respectively, and automatically upload the data to the cloud.

[0045] Step 2: The camera reads the scale value H1 of the laser rangefinder on the ruler and uploads it to the cloud;

[0046] Step 3: The distance between the front-end laser rangefinder and the bottom of the mounting base 4 is h1, and the angle between the attitude sensor at the hovering point and the horizontal plane is θ.

[0047] Step 4: Based on the data from Steps 1 to 3, calculate the horizontal distance l = Lcosθ between the drone hovering point and the ruler installation position, and the settlement s = H1 - h1 - H2cosθ - Lsinθ of any point in the field at any time relative to the ruler position. Negative values ​​indicate that the ground below the drone hovering point is subsided relative to the stationary point, while positive values ​​indicate that the ground below the drone hovering point is bulged relative to the stationary point. This completes the monitoring of the ground settlement below the drone. Data information between the drone and the ruler installation position is collected through cameras, attitude sensors, and laser rangefinders, and the settlement of the ground below the drone is calculated using formulas. This method efficiently and accurately obtains the settlement value of any point in the field at any time relative to the ruler installation position (i.e., the stationary point). Compared with traditional monitoring methods, it greatly saves manpower and resources.

[0048] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A device for monitoring settlement of an offshore soft soil site, comprising a drone (1), a monitoring box (2) arranged on the drone (1), and a scale (3) arranged at a fixed position on the site, characterized in that: The bottom of the unmanned plane (1) is provided with a supporting mechanism, and the inside of the monitoring box (2) is provided with a data acquisition mechanism.

2. The offshore soft soil site settlement monitoring device according to claim 1, wherein: The data acquisition mechanism comprises an installation base (4) fixedly connected to the inner top wall of the monitoring box (2), a camera (5) fixedly connected to the front side of the installation base (4), a posture sensor (6) fixedly connected to the bottom of the installation base (4), and a laser range finder (7) fixedly connected to the front side and the bottom of the installation base (4).

3. An offshore soft soil site settlement monitoring apparatus as claimed in claim 2, wherein: The front side and the bottom of the monitoring box (2) are both provided with monitoring holes (8), and the positions of the monitoring holes (8) correspond to the positions of the camera (5) and the laser range finder (7) respectively.

4. The offshore soft soil site settlement monitoring device of claim 2, wherein: The front side and the bottom of the installation base (4) are both provided with installation screws (9), and the installation base (4) is assembled and connected with the camera (5), the posture sensor (6) and the laser range finder (7) through the installation screws (9) respectively.

5. The offshore soft soil site settlement monitoring device of claim 1, wherein: The top of the monitoring box (2) is provided with a sliding rail (10), and the monitoring box (2) is slidingly connected with the unmanned plane (1) through the sliding rail (10).

6. The offshore soft soil site settlement monitoring device of claim 1, wherein: The supporting mechanism comprises a telescopic rod (11) fixedly connected to the bottom of the unmanned plane (1), and a buffer pad (12) fixedly connected to the bottom of the telescopic rod (11).

7. An offshore soft soil site settlement monitoring apparatus as claimed in claim 6, wherein: The telescopic rod (11) is an electric telescopic rod.

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