Three-dimensional micro-structure displacement monitoring system based on laser induction technology

Abstract

The invention discloses a three-dimensional micro-structure displacement monitoring system based on a laser induction technology, which comprises at least one laser monitoring module and a ground monitoring station wirelessly connected with the laser monitoring module, and is characterized in that the laser monitoring module is used for acquiring three-dimensional micro-structure data Xi of a to-be-monitored area in real time; the ground monitoring station comprises a data receiving module used for receiving data Xi acquired by the laser monitoring module in real time; the data analysis module is used for comparing the data Xi obtained in real time with data X pre-stored in a database, obtaining a comparison result and displaying the comparison result through the display module; and the early warning module is used for giving an alarm when the comparison result exceeds a preset threshold value. According to the displacement monitoring system, the laser monitoring module is adopted to obtain the data of the to-be-monitored three-dimensional micro structure, when the displacement of the three-dimensional micro structure exceeds the preset threshold value, the alarm information is sent out, a monitoring method depending on a large amount of field work and indoor data processing and analysis of measurement personnel is abandoned, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction monitoring, and in particular to a three-dimensional micro-structure displacement monitoring system based on laser sensing technology. Background Art

[0002] Since crustal movement and climate factors can cause various disasters, such as earthquakes, landslides, mudslides, ground fissures, collapse of bridges and buildings, etc. Therefore, in the field of engineering construction, displacement monitoring systems are used to monitor the displacement of some three-dimensional microstructures (such as cracks, microstructural changes in soil or materials in building structures, etc.) in order to prevent structural damage, and displacement monitoring systems are widely used.

[0003] At present, the common means of three-dimensional micro-structure deformation monitoring is to use measuring instruments such as theodolites, levels, rangefinders and total stations to measure the displacement of the measuring points. However, this method has a large workload in the field and requires manual monitoring. It is prone to human errors during the monitoring process, and the subsequent data processing is troublesome and inefficient. Therefore, we propose a three-dimensional micro-structure displacement monitoring system based on laser sensing technology. Summary of the invention

[0004] The purpose of the present invention is to provide a three-dimensional micro-structure displacement monitoring system based on laser sensing technology to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A three-dimensional microstructure displacement monitoring system based on laser sensing technology includes at least one laser monitoring module and a ground monitoring station wirelessly connected thereto, wherein:

[0007] A laser monitoring module is used to obtain three-dimensional microstructure data Xi of the area to be monitored in real time, wherein the data Xi includes three-dimensional coordinate data;

[0008] Ground monitoring stations, including:

[0009] A data receiving module, used to receive data Xi acquired in real time by the laser monitoring module;

[0010] A data analysis module is used to compare the data Xi acquired in real time with the data X pre-stored in the database, obtain the comparison result and display it through the display module; and

[0011] The early warning module is used to issue an alarm message when the comparison result exceeds a preset threshold.

[0012] A further improvement is that the data analysis module is also used to replace the data X stored in the database with the data Xi acquired in real time.

[0013] A further improvement is that the laser monitoring module comprises:

[0014] A supporting portion, on which a movable opening is provided;

[0015] The laser scanning device is arranged on the limiting bottom plate and is placed above the supporting part through the movable opening;

[0016] The lifting part is arranged on the supporting part and connected to the limiting bottom plate, and is used to drive the limiting bottom plate to move vertically;

[0017] a protective cloth covering portion, disposed outside the support portion, and used to cover the protective cloth outside the support portion; and,

[0018] The driving part is connected to the lifting part and the protective cloth covering part through transmission, and is used to make the protective cloth covering part and the lifting part work synchronously.

[0019] A further improvement is that the support portion comprises:

[0020] A top frame with a movable opening; and,

[0021] One end of the support arm is rotatably connected to the outer wall of the top frame, and the other end of the support arm is rotatably connected to a ground fixing part.

[0022] A further improvement is that the lifting part comprises:

[0023] A limit top plate is arranged above the laser scanning device;

[0024] At least two sets of screw rods are rotatably arranged on the top frame and respectively threadedly penetrate the two sides of the limit top plate, and the outer walls of the screw rods are provided with gears that are transmission-connected to the driving part;

[0025] A pull rope connector connects the limit top plate and the limit bottom plate.

[0026] A further improvement is that the protective cloth covering portion comprises:

[0027] A support frame, one end of which is axially connected to the top of the top frame, and the other end of which extends to the ground fixing portion. The support frame is provided with a reeling roller which is rotated by a torsion spring, and a protective cloth is wound on the reeling roller; and

[0028] A connecting frame has one end connected to the driving part, and the connecting frame is connected to one end of the protective cloth.

[0029] A further improvement is that the driving unit comprises:

[0030] The rotating gear ring is rotatably arranged at the top of the top frame and is coaxial with the top frame. The rotating gear ring is rotatably connected to one end of the connecting frame. The inner side of the rotating gear ring is meshed with the gear and the driving gear. The driving gear is driven to rotate by a rotating device arranged on the top frame.

[0031] A further improvement is that the pull rope connector includes:

[0032] At least two sets of shafts are rotatably disposed on both sides of the bottom of the limiting top plate, and the outer walls of the two sets of shafts are sleeved with driven gears. The shafts are wound with pull ropes, and one end of the pull ropes is connected to the limiting bottom plate; and

[0033] At least two sets of racks 2 correspond to and mesh with two sets of driven gears respectively. One end of the rack 2 is connected to the top frame, and the other end movably penetrates the limiting top plate, so as to drive the driven gear to drive the shaft to unwind the pull rope when the limiting top plate is downward.

[0034] A further improvement is that the ground fixing part comprises:

[0035] A bottom plate is rotatably connected to one end of the support arm, an inserting piece 1 is movably inserted on the bottom plate, and a groove is formed at the bottom of the bottom plate;

[0036] At least two groups of rotating shafts are respectively arranged at two ends of the groove through torsion springs, the outer wall of the rotating shaft is sleeved with a transmission gear, and the outer walls of the two groups of rotating shafts are symmetrically sleeved with a plurality of groups of catching teeth, and the catching teeth are arc-shaped; and

[0037] At least two sets of racks 1 correspond to and mesh with the two sets of transmission gears respectively. At least two sets of racks 1 are movable through the bottom plate and are commonly connected to a connecting rod for contacting the insert 1. The connecting rod and the bottom plate are connected by an elastic member.

[0038] A further improvement is that the areas of the limiting top plate and the limiting bottom plate are both larger than the area of ​​the movable opening, a card block is provided on the top of the limiting bottom plate, a card slot for the card block to enter is provided at the bottom of the top frame, a plurality of groups of inserts are provided at the bottom of the limiting bottom plate, a plurality of groups of detection sensors electrically connected to the control module are provided on the limiting top plate, the detection sensors include a rain sensor and a wind sensor, the control module is arranged on the limiting bottom plate and electrically connected to the rotating device, and is used to control the rotating device to work when the data detected by the rain sensor and the wind sensor reaches a preset threshold.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The displacement monitoring system of the present invention adopts a laser monitoring module to obtain data of the three-dimensional microstructure to be monitored, and issues an alarm message when the displacement of the three-dimensional microstructure exceeds a preset threshold, thereby abandoning the traditional monitoring method that relies on a large amount of field work by surveying personnel and indoor data processing and analysis, and improving the overall work efficiency; when the laser monitoring module in the displacement monitoring system of the present invention is used outdoors and encounters bad weather, the driving part can drive the lifting part to drive its laser scanning equipment downward to the supporting part, and at the same time drive the protective cloth covering part on the outside of the supporting part to provide protection for the laser scanning equipment in the supporting part, effectively reducing the impact on the laser scanning equipment in bad weather, extending its service life, and ensuring its long-term and stable outdoor monitoring operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the structure of the laser monitoring module of the present invention;

[0042] Figure 2 It is a schematic diagram of the local structure of the support part of the present invention;

[0043] Figure 3 Schematic diagram of the limiting bottom plate structure of the present invention

[0044] Figure 4 For the present invention Figure 1 Schematic diagram of the local structure in;

[0045] Figure 5 This is a schematic diagram of the local structure of the ground fixing part of the present invention.

[0046] In the figure: 1. top frame; 2. support arm; 3. bottom plate; 4. insert one; 5. rack one; 6. elastic member; 7. transmission gear; 8. gripping teeth; 9. laser scanning device; 10. limit bottom plate; 11. insert two; 12. limit top plate; 13. screw; 14. rack two; 15. rotating device; 16. shaft; 17. pull rope; 18. movable mouth; 19. rotating gear ring; 20. detection sensor; 21. support frame; 22. unwinding roller; 23. connecting frame. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Please refer to the attached Figure 1

[0049] A three-dimensional microstructure displacement monitoring system based on laser sensing technology, comprising at least one laser monitoring module and a ground monitoring station wirelessly connected thereto;

[0050] The above-mentioned three-dimensional microstructure can be a microstructure of a geological layer, such as a crack, a microstructural change of a soil body, a building material in a building structure, etc. When in use, monitoring points are arranged at key positions of the three-dimensional microstructure of the area to be monitored (usually using a reflective target or a marker, etc.), and then the area to be monitored is scanned by a laser monitoring module to obtain the three-dimensional microstructure data Xi of the area to be monitored in real time. The data Xi includes three-dimensional coordinate data, which belongs to the prior art and will not be described in detail here.

[0051] The laser monitoring module includes:

[0052] A support portion, on which a movable opening 18 is formed;

[0053] The laser scanning device 9 is arranged on the limiting bottom plate 10 and is placed above the supporting part through the movable opening 18. The laser scanning device 9 belongs to the prior art, such as a three-dimensional laser scanner or a laser radar;

[0054] The lifting part is arranged on the supporting part and connected to the limiting bottom plate 10, and is used to drive the limiting bottom plate 10 to move vertically;

[0055] a protective cloth covering portion, disposed outside the support portion, and used to cover the protective cloth outside the support portion; and,

[0056] The driving part is connected to the lifting part and the protective cloth covering part through transmission, and is used to make the protective cloth covering part and the lifting part work synchronously.

[0057] With this arrangement, when the laser monitoring module is used outdoors and encounters severe weather, such as dust caused by strong winds or heavy rain, the driving part can drive the lifting part and the protective cloth covering part to work, so that the protective cloth covering part covers the protective cloth on the outside of the supporting part while the lifting part drives the limiting base plate 10, so that the laser scanning device 9 moves to the protective cloth outside the supporting part, thereby providing efficient protection for the laser scanning device 9 in severe weather.

[0058] Please refer to the attached Figure 2

[0059] Preferably, the support portion of this embodiment includes:

[0060] A top frame 1 having a movable opening 18; and

[0061] One end of the support arm 2 is rotatably connected to the outer wall of the top frame 1, and the other end is rotatably connected to a ground fixing part.

[0062] When in use, the support arm 2 and the top frame 1 facilitate the installation of the laser monitoring module near a three-dimensional microstructure to be monitored for monitoring.

[0063] Please refer to the attached Figure 3 -Attached Figure 4

[0064] Preferably, the lifting part of this embodiment includes:

[0065] A limit top plate 12 is provided above the laser scanning device 9;

[0066] At least two sets of screw rods 13 are rotatably arranged on the top frame 1 through bearings and respectively threadedly penetrate the two sides of the limiting top plate 12, and the outer wall of the screw rod 13 is provided with a gear connected to the driving part;

[0067] The pull rope connector connects the limiting top plate 12 and the limiting bottom plate 10 .

[0068] When in use, the driving unit drives the gears and then drives the two sets of screws 13 to rotate synchronously in the same direction. The screws 13 drive the limiting top plate 12, and the limiting top plate 12 drives the limiting bottom plate 10 through the pull rope connector to make the laser scanning device 9 move downward through the movable opening 18.

[0069] Preferably, the protective cloth covering portion of this embodiment includes:

[0070] The support frame 21 has one end axially connected to the top of the top frame 1 and the other end extending to the ground fixing portion. The support frame 21 is provided with a reel 22 which is rotated by a torsion spring. The reel 22 is wound with a protective cloth which can be made of polyethylene material or polyvinyl chloride; and,

[0071] One end of the connecting frame 23 is connected to the driving part, and the connecting frame 23 is connected to one end of the protective cloth. When in use, the driving part rotates the connecting frame 23 for one circle, and then pulls out the protective cloth. The protective cloth is wrapped around the outside of the supporting part, which can effectively prevent the laser scanning equipment 9 from being affected by dust caused by strong wind or rain.

[0072] Preferably, the driving unit of this embodiment includes:

[0073] The rotating gear ring 19 is rotatably arranged on the top of the top frame 1 through a bearing and is coaxial with the top frame 1. The rotating gear ring 19 is rotatably connected to one end of the connecting frame 23. The inner side of the rotating gear ring 19 is meshed with the gear and the driving gear. The driving gear is driven to rotate by the rotating device 15 arranged on the top frame 1.

[0074] After adjusting the support arm 2 to contact the installation position, adjust the angles of the carrier frame 21 and the connecting frame 23 so that the protective cloth is wrapped around the outside of the support arm 2. The rotating device 15 is, for example, a servo motor and a reducer. The driving gear is driven by the rotating device 15, so that the driving gear drives the rotating gear ring 19, and the rotating gear ring 19 drives the gear, thereby making the screw 13 work. At the same time, the rotating gear ring 19 drives the connecting frame 23, and the connecting frame 23 pulls out the protective cloth wrapped around the outside of the support arm 2. In this way, the laser scanning device 9 can be moved down to the protective cloth wrapped around the outside of the support arm 2.

[0075] Preferably, the pull rope connector of this embodiment includes:

[0076] At least two sets of shafts 16 are rotatably disposed on both sides of the bottom of the limiting top plate 12 through bearings and bearing seats, and the outer walls of the two sets of shafts 16 are sleeved with driven gears. The shafts 16 are wound with pull ropes 17, and one end of the pull rope 17 is connected to the limiting bottom plate 10; and,

[0077] At least two sets of racks 14 correspond to and mesh with two sets of driven gears respectively. One end of the rack 14 is connected to the top frame 1, and the other end movably passes through the limiting top plate 12, so as to drive the driven gear to drive the shaft 16 to unwind the pull rope 17 when the limiting top plate 12 moves downward.

[0078] When the limiting top plate 12 is downward, the synchronous pull rope 17 is unwound so that the limiting bottom plate 10 drives the laser scanning device 9 downward, so that the laser scanning device 9 can contact the ground at the installation position, providing better protection for it, and making the laser scanning device 9 less susceptible to damage due to the shaking of the supporting part.

[0079] Preferably, the ground fixing part of this embodiment includes:

[0080] The bottom plate 3 is rotatably connected to one end of the support arm 2. An insert 4 is movably inserted on the bottom plate 3. The vertical section is L-shaped and is used to be inserted into the ground at the installation location. A groove is provided at the bottom of the bottom plate 3.

[0081] At least two sets of rotating shafts are respectively arranged at the two ends of the groove through torsion springs, the outer wall of the rotating shaft is sleeved with a transmission gear 7, and the outer walls of the two sets of rotating shafts are symmetrically sleeved with a plurality of sets of catching teeth 8, and the catching teeth 8 are arc-shaped; and,

[0082] At least two groups of racks 5 correspond to and mesh with two groups of transmission gears 7 respectively. At least two groups of racks 5 are movable through the bottom plate 3 and are commonly connected to a connecting rod for contacting the insert 4. The connecting rod and the bottom plate 3 are connected by an elastic member 6. The elastic member 6 is, for example, a spring, and is used to drive the connecting rod to reset. When in use, the user can use a tool to make the insert 4 go down into the soil. When the insert 4 goes down to a predetermined position, it will contact the connecting rod. When it continues to go down, it will drive the connecting rod to drive the rack 5 downward. The rack 5 drives the gripping teeth 8 to rotate and insert into the soil, thereby improving the fixing strength between the support part and the ground at the installation position;

[0083] Preferably, as attached Figure 2 As shown, the outer wall of the lateral end of the insert 4 can also be threadedly sleeved on the outer wall of the screw, one end of the screw is rotatably connected to the base plate 3, and the other end is provided with a driving handwheel. The user can make the insert 4 enter the ground soil at the installation location by rotating the driving handwheel.

[0084] Preferably, the areas of the limiting top plate 12 and the limiting bottom plate 10 of the present embodiment are both larger than the area of ​​the movable opening 18, and the limiting top plate 12 and the limiting bottom plate 10 cannot pass through the movable opening 18, thereby playing a limiting role. A card block (not shown in the figure) is provided on the top of the limiting bottom plate 10, and a card slot (not shown in the figure) is provided at the bottom of the top frame 1 for the card block to enter. The card block and the card slot prevent the laser scanning device 9 from being displaced during normal use; a plurality of groups of inserts 11 are provided at the bottom of the limiting bottom plate 10, so that the laser scanning device 9 can be fixed to the ground of the installation position through the inserts 11, thereby further improving its protection strength.

[0085] Preferably, the limiting top plate 12 of the present embodiment is provided with several groups of detection sensors 20 electrically connected to the control module, the detection sensors 20 include rain sensors and wind sensors, the control module is arranged on the limiting bottom plate 10 and electrically connected to the rotating device 15, the control module is, for example, a controller, and the rain sensors and wind sensors send signals to the controller when they detect that the external rainfall or wind force exceeds a preset threshold value, and the controller controls the rotating device 15 to work, so that the protective cloth wraps around the support part and the laser scanning device 9 enters downward into the protective cloth, so that the laser scanning device 9 is damaged.

[0086] A three-dimensional microstructure displacement monitoring method based on laser sensing technology, using the above-mentioned monitoring system, includes the following steps:

[0087] S1: Monitoring points are arranged at key positions of the three-dimensional microstructures in the area to be monitored, and the three-dimensional microstructure data Xi of the area to be monitored is obtained in real time by scanning the monitoring points with a laser monitoring module, and the three-dimensional microstructure data Xi is sent to a ground monitoring station, wherein the data Xi includes three-dimensional coordinate data, and the ground monitoring station and the laser monitoring module use wireless communication technology (such as Wi-Fi, 4G / 5G, satellite communication, etc.) to realize real-time data transmission between the laser monitoring module and the ground monitoring station;

[0088] S2: The ground monitoring station receives the real-time acquired data Xi through the data receiving module, and compares it with the data X pre-stored in the database through the data analysis module, and displays the comparison result through the display module; wherein the data analysis module is also used to replace the data X stored in the database with the real-time acquired data Xi;

[0089] S3: When the comparison result exceeds the preset threshold, the early warning module in the ground monitoring station issues an alarm message.

[0090] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional micro-structure displacement monitoring system based on laser sensing technology, characterized in that: It includes at least one laser monitoring module and a ground monitoring station wirelessly connected thereto, wherein: A laser monitoring module is used to obtain three-dimensional microstructure data Xi of the area to be monitored in real time, wherein the data Xi includes three-dimensional coordinate data; Ground monitoring stations, including: A data receiving module, used to receive data Xi acquired in real time by the laser monitoring module; A data analysis module is used to compare the data Xi acquired in real time with the data X pre-stored in the database, obtain the comparison result and display it through the display module; and The early warning module is used to issue an alarm message when the comparison result exceeds a preset threshold.

2. The monitoring system according to claim 1, characterized in that: The data analysis module is also used to replace the data X stored in the database with the data Xi acquired in real time.

3. The monitoring system according to claim 1, characterized in that: The laser monitoring module comprises: A supporting portion having a movable opening (18) formed thereon; A laser scanning device (9) is arranged on the limiting bottom plate (10) and is placed above the supporting portion through the movable opening (18); A lifting part, arranged on the supporting part and connected to the limiting bottom plate (10), used for driving the limiting bottom plate (10) to move vertically; a protective cloth covering portion, disposed outside the support portion, and used to cover the protective cloth outside the support portion; and, The driving part is connected to the lifting part and the protective cloth covering part through transmission, and is used to make the protective cloth covering part and the lifting part work synchronously.

4. The monitoring system according to claim 3, characterized in that: The support portion comprises: A top frame (1) having a movable opening (18); and One end of the support arm (2) is rotatably connected to the outer wall of the top frame (1), and the other end is rotatably connected to a ground fixing portion.

5. The monitoring system according to claim 4, characterized in that: The lifting part comprises: A limiting top plate (12) is arranged above the laser scanning device (9); At least two groups of screw rods (13) are rotatably arranged on the top frame (1) and respectively threadedly penetrate the two sides of the limiting top plate (12); the outer wall of the screw rod (13) is provided with a gear which is transmission-connected to the driving part; The pull rope connector connects the position limiting top plate (12) and the position limiting bottom plate (10).

6. The monitoring system according to claim 5, characterized in that: The protective cloth covering portion comprises: A support frame (21) has one end axially connected to the top of the top frame (1) and the other end extending to a ground fixing portion. The support frame (21) is provided with a reel (22) which is rotated by a torsion spring, and a protective cloth is wound on the reel (22); and One end of the connecting frame (23) is connected to the driving part, and the connecting frame (23) is connected to one end of the protective cloth.

7. The monitoring system according to claim 6, characterized in that: The driving unit comprises: A rotating gear ring (19) is rotatably arranged on the top of the top frame (1) and is coaxial with the top frame (1). The rotating gear ring (19) is rotatably connected to one end of the connecting frame (23). The inner side of the rotating gear ring (19) is meshed with a gear and a driving gear. The driving gear is driven to rotate by a rotating device (15) arranged on the top frame (1).

8. The monitoring system according to claim 5, characterized in that: The pull rope connector comprises: At least two groups of shafts (16) are rotatably disposed on both sides of the bottom of the limiting top plate (12), and the outer walls of the two groups of shafts (16) are sleeved with driven gears. The shafts (16) are wound with a pull rope (17), and one end of the pull rope (17) is connected to the limiting bottom plate (10); and, At least two sets of racks (14) correspond to and mesh with the two sets of driven gears respectively. One end of the rack (14) is connected to the top frame (1), and the other end movably penetrates the limit top plate (12) to drive the driven gear to drive the shaft (16) to unwind the pull rope (17) when the limit top plate (12) is downward.

9. The monitoring system according to claim 4, characterized in that: The ground fixing part comprises: A bottom plate (3) is rotatably connected to one end of the support arm (2), an insert (4) is movably inserted on the bottom plate (3), and a groove is formed at the bottom of the bottom plate (3); At least two groups of rotating shafts are respectively arranged at two ends of the groove through torsion springs, the outer wall of the rotating shaft is sleeved with a transmission gear (7), and the outer walls of the two groups of rotating shafts are symmetrically sleeved with a plurality of groups of ground-grasping teeth (8), and the ground-grasping teeth (8) are arc-shaped; and, At least two sets of racks (5) correspond to and mesh with the two sets of transmission gears (7) respectively. The at least two sets of racks (5) are movable through the base plate (3) and are commonly connected to a connecting rod for contacting the insert (4). The connecting rod and the base plate (3) are connected by an elastic member (6).

10. The monitoring system according to claim 5, characterized in that: The areas of the limiting top plate (12) and the limiting bottom plate (10) are both larger than the area of ​​the movable opening (18); a card block is provided at the top of the limiting bottom plate (10); a card slot for the card block to enter is provided at the bottom of the top frame (1); a plurality of groups of inserts (11) are provided at the bottom of the limiting bottom plate (10); a plurality of groups of detection sensors (20) electrically connected to a control module are provided on the limiting top plate (12); the detection sensors (20) include a rain sensor and a wind sensor; the control module is provided on the limiting bottom plate (10) and electrically connected to the rotating device (15), and is used to control the rotating device (15) to work when the data detected by the rain sensor and the wind sensor reaches a preset threshold.

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