Settlement monitoring device based on InSAR

Abstract

The invention discloses a settlement monitoring device based on InSAR, and belongs to the technical field of geological monitoring. A settlement monitoring device based on InSAR comprises a plurality of SAR radars capable of emitting electromagnetic waves and a plurality of corner reflectors located in a monitored area, the corner reflectors are distributed in the monitored area at intervals, and the corner reflectors are fixed to the ground through bases. The top of the corner reflector is provided with a flushing assembly used for cleaning the corner reflector. By arranging the flushing assembly, the corner reflector is flushed under the action of the flushing head, meanwhile, when the visual camera detects that local dirt exists on the surface of the corner reflector, the local dirt position of the corner reflector is rotated to correspond to the position of the water permeable notch, most of water spraying holes of the flushing head are closed through the covering plate, and therefore the water spraying efficiency of the corner reflector is improved. And water can be sprayed out only through the water spraying holes corresponding to the water permeable notches, so that dirt is washed at high pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of geological monitoring, and in particular to a subsidence monitoring device based on InSAR. Background Art

[0002] Geological subsidence is the loss of ground elevation caused by natural and / or human factors. In most parts of the world, geological subsidence is primarily caused by human factors. To address this phenomenon, control measures are being implemented in areas of geological subsidence worldwide, such as controlling groundwater extraction and artificial recharge. Furthermore, a number of geological subsidence monitoring networks have been established in key areas.

[0003] InSAR (Synthetic Aperture Radar Interferometry) is an air-to-ground remote sensing technology that uses radar waves to monitor surface deformation. This technology provides highly accurate deformation estimates and is suitable for monitoring a variety of infrastructure and natural disasters. It offers all-weather, all-day, high-resolution, high-precision data processing, and automated data processing.

[0004] Currently, when conducting subsidence monitoring based on InSAR, multiple corner reflectors are distributed in the monitoring area. A corner reflector is an artificial metal structure, usually composed of three mutually perpendicular metal plates. It can reflect the incident radar signal almost completely back to the satellite along the original direction, generating a very strong radar echo signal, which significantly improves the monitoring accuracy and reliability.

[0005] During the daily use of the corner reflector, dust and other dirt will accumulate on its reflective surface, especially the upward and nearly horizontal reflective surface, which is most likely to accumulate dust, bird droppings and other dirt. A large amount of dust on the surface of the corner reflector will significantly affect the reflection performance of the radar wave, resulting in attenuation of the echo intensity and decreased phase stability, thereby reducing the accuracy of settlement monitoring.

[0006] Therefore, the present application proposes a sedimentation monitoring device with a timely cleaning function, which can ensure that there is no dirt on the surface of the corner reflector to ensure accurate monitoring. Summary of the Invention

[0007] The purpose of the present invention is to solve the problems in the prior art and to propose a subsidence monitoring device based on InSAR.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A settlement monitoring device based on InSAR includes multiple SAR radars capable of emitting electromagnetic waves and multiple corner reflectors located in the monitored area. The multiple corner reflectors are distributed at intervals in the monitored area and are fixed to the ground through a base. A flushing component for cleaning the corner reflectors is provided on the top of the corner reflectors. A water storage chamber for supplying water to the flushing component is provided inside the base. A pressurizing component is provided inside the flushing component for high-pressure flushing of local dirt on the corner reflectors.

[0009] In some embodiments, a hollow shaft is fixed in the middle of the base, and the upper end of the hollow shaft is connected to the flushing assembly. The flushing assembly includes a flushing head installed on the upper end of the hollow shaft through a connecting pipe and a connecting sleeve. The connecting pipe is fixed at the bottom of the flushing head, and the connecting sleeve is arranged on the surface of the flushing head. The connecting sleeve is threadedly connected to the upper end of the hollow shaft.

[0010] In some embodiments, a plurality of water spray holes are provided on the surface of the flushing head, and the water spray paths of the water spray holes cover the corner reflectors.

[0011] In some embodiments, the corner reflector rotates on the surface of the hollow shaft, the corner reflector is driven to rotate by a driving motor, the corner reflector is rotated on the surface of the base through a rotating component, and the corner reflector dries the moisture on the surface by rotating.

[0012] In some embodiments, the pressurizing assembly includes a covering plate disposed inside the flushing head, the covering plate matches the inside of the flushing head, and a water-permeable gap for water to pass through is opened on the surface of the flushing head.

[0013] In some embodiments, a sealing strip is provided at the edge of the cover plate. When the cover plate is in contact with the inner wall of the flushing head, the upper end of the connecting pipe is located inside the cover plate through a water-permeable gap, and the cover plate is pressed against the inner wall of the flushing head by water pressure.

[0014] In some embodiments, the base surface is provided with a positioning assembly for positioning the angle of the corner reflector, and the positioning assembly includes a positioning plate that slides vertically on the base surface through a guide rod and a positioning rod fixed on the lower surface of the corner reflector.

[0015] In some embodiments, two groups of weeding components are symmetrically arranged on the lower surface of the corner reflector, and the two groups of weeding components are respectively located at diagonal positions of the corner reflector.

[0016] In some embodiments, the weeding component includes a cutting knife that rotates on the lower surface of the corner reflector through a rotating shaft, the surface of the rotating shaft is provided with a torsion spring for driving the cutting knife to rotate to the bottom of the corner reflector, and the lower surface of the corner reflector is provided with a first stop block for limiting the expansion angle of the cutting knife and a second stop block for limiting the storage angle of the cutting knife.

[0017] In some embodiments, a visual camera is provided on one side of the corner reflector for monitoring the dirtiness of the corner reflector surface.

[0018] Compared with the prior art, the present invention provides a settlement monitoring device based on InSAR, which has the following beneficial effects.

[0019] 1. The present invention provides a flushing assembly to flush the corner reflector under the action of a flushing head. At the same time, when the visual camera detects local dirt on the surface of the corner reflector, the local dirty part of the corner reflector is rotated to correspond to the position of the water-permeable gap, and most of the water spray holes of the flushing head are closed by a covering plate, so that water can only be sprayed out through the water spray holes corresponding to the water-permeable gap, thereby performing high-pressure flushing of the dirt.

[0020] 2. The present invention provides a weeding component. When the corner reflector generates centrifugal force by rotating to dry the water, the centrifugal force generated drives the cutting knife to rotate on the surface of the rotating shaft, so that the cutting knife extends from under the corner reflector to cut the weeds around the corner reflector, thereby preventing the weeds from growing tall and blocking the corner reflector, which would affect the reflection of electromagnetic waves by the corner reflector.

[0021] Other advantages, objects and features of the present invention will be described in part in the following description; and in part will be apparent to those skilled in the art based on an examination of the following; or may be taught from the practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the front cross-sectional structure of the corner reflector in the present invention.

[0024] Figure 3 For the present invention Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0025] Figure 4 Schematic diagram of the explosion structure of the flushing component in the present invention.

[0026] Figure 5 Schematic diagram of the water spray path of the flushing head in the present invention.

[0027] Figure 6 Schematic diagram of the explosion structure of the pressurized component in the present invention.

[0028] Figure 7 This is a structural schematic diagram of the pressurizing component in the present invention in use state.

[0029] Figure 8 This is a schematic diagram of the bottom-up structure of the corner reflector in the present invention.

[0030] Figure 9 For the present invention Figure 8 Schematic diagram of the structure enlarged at point B.

[0031] Figure 10 This is a schematic diagram of the structure of the weeding component in the present invention in use state.

[0032] Figure 11 This is a schematic diagram of the structure of the weeding component in the storage state of the present invention.

[0033] In the picture: 1. Corner reflector; 2. Base; 201. Water storage chamber; 3. Hollow shaft; 4. Rotating assembly; 401. Annular guide rail; 402. Rotating block; 403. Ball bearing; 5. Flushing assembly; 501. Flushing head; 502. Connecting pipe; 503. Connecting sleeve; 504. Positioning protrusion; 6. Pressurizing assembly; 601. Cover plate; 602. Water-permeable gap; 603. Sealing strip; 604. Connecting frame; 7. Positioning assembly; 701. Positioning plate; 702. Positioning rod; 703. Guide rod; 8. Through-beam positioning sensor; 9. Visual camera; 901. Vertical pole; 10. Weeding assembly; 1001. Cutting knife; 1002. Torsion spring; 1003. First stop block; 1004. Second stop block; 1005. Mounting plate; 11. Reinforcement ring; 12. Human proximity sensor. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figure 1-11 A subsidence monitoring device based on InSAR includes multiple SAR radars capable of emitting electromagnetic waves and multiple corner reflectors 1 located in the monitored area. The multiple SAR radars are located on multiple orbiting satellites, and the multiple corner reflectors 1 are distributed at intervals in the monitored area. The corner reflectors 1 use four-quadrant corner reflectors 1.

[0036] It can be understood that when monitoring the settlement of the monitored area, SAR radars carried by multiple orbiting satellites respectively take SAR images of the monitored area. The position of the corner reflector 1 in the image is clearest, and the coordinates of each corner reflector 1 are recorded from different angles. Every time the orbiting satellite passes over the detected area, it takes a picture and records the coordinates of each picture, so as to monitor whether settlement occurs in the monitored area. Since the operation cycle of a single orbiting satellite is long, the time interval between the coordinate points taken is long. When settlement occurs, it cannot be discovered in time. Therefore, by utilizing multiple orbiting satellites, each orbiting satellite can record once when passing over the monitored area, thereby shortening the shooting cycle. By setting a four-quadrant corner reflector 1, electromagnetic waves of different angles emitted by different orbiting satellites can be reflected.

[0037] Specifically, the corner reflector 1 is fixed to the ground through a base 2, the lower half of the base 2 is buried in the ground, a flushing assembly 5 for cleaning the corner reflector 1 is provided on the top of the corner reflector 1, a reinforcement ring 11 is fixed to the bottom of the base 2, a hollow shaft 3 is fixed to the middle of the base 2, the upper end of the hollow shaft 3 is connected to the flushing assembly 5, a water storage chamber 201 is provided inside the base 2 through a partition, a water pump is provided inside the water storage chamber 201, the lower end of the hollow shaft 3 is connected to the water outlet of the water pump, the hollow shaft 3 is fixed to the surface of the partition, and the water storage chamber 201 is replenished with cleaning water through an external water source; refer to Figure 4-5 The flushing assembly 5 includes a flushing head 501 installed on the upper end of the hollow shaft 3 through a connecting pipe 502 and a connecting sleeve 503. The bottom of the flushing head 501 is arc-shaped, and a plurality of water spray holes are opened on the surface of the flushing head 501. The water spray path of the water spray holes covers the corner reflector 1. The connecting pipe 502 is fixed to the bottom of the flushing head 501, and the connecting sleeve 503 is sleeved on the surface of the flushing head 501. The connecting sleeve 503 is threadedly connected to the upper end of the hollow shaft 3.

[0038] It can be understood that by providing the reinforcement ring 11, the strength of the base 2 buried in the ground is improved. When the ground settles, the base 2 and the corner reflector 1 can be effectively driven to settle together with the ground; when the corner reflector 1 needs to be cleaned, the water in the water storage chamber 201 is transported to the inside of the flushing head 501 through the hollow shaft 3 and the connecting pipe 502 by a water pump, and sprayed out through the water spray hole to flush the dirt on the surface of the corner reflector 1, thereby avoiding affecting the reflection of electromagnetic waves; by providing the connecting pipe 502 and the connecting sleeve 503, it is convenient to quickly install the flushing head 501 on the upper end of the hollow shaft 3, so that the flushing head 501 is convenient to replace.

[0039] Specifically, the corner reflector 1 rotates on the surface of the hollow shaft 3. A tube body that cooperates with the hollow shaft 3 is provided in the middle of the corner reflector 1. The lower end of the tube body is located inside the base 2. A gear is fixed to the lower end of the tube body. A driving motor is fixed on the upper surface of the partition. Another gear is fixed at one end of the output shaft of the driving motor. The two gears are engaged with each other. The corner reflector 1 rotates on the surface of the base 2 through the rotating component 4. The rotating component 4 includes an annular guide rail 401 fixed on the surface of the base 2. A plurality of rotating blocks 402 that cooperate with the annular guide rail 401 are fixed on the lower surface of the base 2. A plurality of balls 403 roll on the side of the rotating block 402 opposite to the annular guide rail 401. The plurality of rotating blocks 402 roll on the surface of the annular guide rail 401 through the plurality of balls 403.

[0040] It can be understood that the corner reflector 1 rotates on the surface of the hollow shaft 3, so that the driving motor and the two gears drive the corner reflector 1 to rotate, so that after the corner reflector 1 is cleaned, the centrifugal force is generated by the rotation of the corner reflector 1, thereby throwing out the residual moisture on the surface of the corner reflector 1, so that the corner reflector 1 can quickly restore dryness and avoid more dust contamination caused by the moisture on its surface; through the rotating component 4, the corner reflector 1 is rotated on the surface of the base 2 through the rotating component 4, thereby improving the stability of the rotation process of the corner reflector 1.

[0041] Specifically, a pressure component 6 for locally flushing the corner reflector 1 is provided inside the flushing head 501. The pressure component 6 includes a covering plate 601 provided inside the flushing head 501. The covering plate 601 matches the inside of the flushing head 501. A water-permeable gap 602 for water passage is provided on the surface of the flushing head 501. When the covering plate 601 is in contact with the inner wall of the flushing head 501, the upper end of the connecting pipe 502 is located inside the covering plate 601 through the water-permeable gap 602. A sealing strip 603 is provided at the edge of the covering plate 601. The covering plate 601 is driven to rise and fall by an electric push rod. A connecting frame 604 is fixed to the inner wall of the covering plate 601. The connecting frame 604 is fixed to the output end of the electric push rod, and the electric push rod is fixed to the upper surface of the flushing nozzle.

[0042] It is understandable that when a certain area on the surface of the corner reflector 1 is dirty and difficult to clean, the electric push rod drives the cover plate 601 to fit the inner wall of the cleaning head, so that water is filled above the cover plate 601. Since the cover plate 601 blocks the water spray holes of the flushing head 501, water can only be sprayed out through the water spray holes corresponding to the water-permeable notches 602. Since the water outlet area is reduced, the water outlet pressure of the water spray holes increases. By rotating the corner reflector 1, the dirty position is rotated to the position corresponding to the water-permeable notch 602, thereby performing high-pressure washing of the dirt. By setting a sealing strip 603, the sealing between the covering plate 601 and the flushing head 501 is improved. By setting the upper end of the connecting pipe 502 inside the covering plate 601, water enters directly above the covering plate 601 through the connecting pipe 502, so that the water pressure exerts pressure on the covering plate 601, pressing the covering plate 601 tightly against the inner wall of the flushing head 501, thereby preventing water pressure from leaking from other positions, causing deformation of the covering plate 601, and affecting the blocking of other water spray holes.

[0043] Specifically, a visual camera 9 for monitoring the dirt condition of the surface of the corner reflector 1 is provided on one side of the corner reflector 1. The visual camera 9 is fixed to the upper end of a vertical pole 901, and the vertical pole 901 is fixed to the ground.

[0044] It can be understood that the dirt on the surface of the corner reflector 1 is monitored by a visual sensor. When dirt is found on the surface of the corner reflector 1, the corner reflector 1 is flushed by the flushing head 501. At the same time, after cleaning, if it is found that dirt is not cleaned somewhere on the corner reflector 1, the dirty part of the corner reflector 1 is rotated to the position corresponding to the water-permeable gap 602 for high-pressure flushing.

[0045] Specifically, a positioning assembly 7 for positioning the angle of the corner reflector 1 is provided on the surface of the base 2. The positioning assembly 7 includes a positioning plate 701 that slides vertically on the surface of the base 2 through a guide rod 703 and a positioning rod 702 fixed on the lower surface of the corner reflector 1. A through hole that cooperates with the positioning rod 702 is provided on the surface of the positioning plate 701. The guide rod 703 is fixed on the surface of the base 2. The positioning plate 701 is driven to rise and fall by an electric push rod, and the electric push rod is fixed on the surface of the base 2.

[0046] It is understandable that since the corner reflector needs to be rotated after cleaning to generate centrifugal force to drain the water, it needs to be accurately reset afterwards to avoid the angle deviation caused by rotation causing the coordinate position of the SAR radar to deviate, affecting the monitoring accuracy. Therefore, by setting the positioning component 7, when the corner reflector 1 is rotated and reset, the electric push rod drives the positioning plate 701 to slide vertically on the surface of the guide rod 703, so that the positioning plate 701 is mounted on the surface of the positioning rod 702 to position the angle of the corner reflector 1. At the same time, the angle displacement of the corner reflector 1 during daily use can be avoided.

[0047] Specifically, a cross-beam positioning sensor 8 is provided on the lower surface of the corner reflector 1 and the surface of the positioning plate 701 , and the initial positions of the water-permeable gap 602 , the positioning component 7 , the visual camera 9 and the cross-beam positioning sensor 8 are at the same angle.

[0048] It can be understood that by setting up the cross-beam positioning sensor 8, the position angle of the corner reflector 1 can be detected, which facilitates the positioning of the corner reflector 1; by setting the initial positions of the water-permeable gap 602, the positioning component 7, the visual camera 9 and the cross-beam positioning sensor 8 to the same angle, it is convenient to rotate the locally dirty position on the surface of the corner reflector 1 to correspond to the position of the water-permeable gap 602 for high-pressure flushing.

[0049] Specifically, a positioning protrusion 504 is provided on the surface of the connecting pipe 502 , a positioning groove matching the positioning protrusion 504 is provided on the upper end of the hollow shaft 3 , and an indicator mark corresponding to the water-permeable gap 602 is provided on the upper surface of the flushing head 501 .

[0050] It is understandable that by providing the positioning protrusion 504 and the indicator mark, when installing the flushing head 501 , the position angle of the flushing head 501 and the water-permeable gap 602 can be oriented and installed so that the orientation angle of the water-permeable gap 602 corresponds to the visual camera 9 .

[0051] Specifically, two groups of weeding components 10 are symmetrically arranged on the lower surface of the corner reflector 1, and the two groups of weeding components 10 are respectively located at diagonal positions of the corner reflector 1; The weeding component 10 includes a cutting knife 1001 that rotates on the lower surface of the corner reflector 1 through a rotating shaft. The surface of the rotating shaft is provided with a torsion spring 1002 for driving the cutting knife 1001 to rotate to the bottom of the corner reflector 1. The lower surface of the corner reflector 1 is provided with a first stop block 1003 for limiting the expansion angle of the cutting knife 1001 and a second stop block 1004 for limiting the storage angle of the cutting knife 1001. The first stop block 1003 and the second stop block 1004 are both matched with the cutting knife 1001.

[0052] It can be understood that when the corner reflector 1 generates centrifugal force by rotating to dry the water, the centrifugal force generated drives the cutting knife 1001 to rotate on the surface of the rotating shaft, so that the cutting knife 1001 extends from the bottom of the corner reflector 1 and is limited by the first stopper 1003. When the two cutting knives 1001 are rotated and unfolded, the weeds around the corner reflector 1 are cut to prevent the weeds from blocking the corner reflector 1 after growing tall, thereby affecting the reflection of electromagnetic waves by the corner reflector 1; the rotation direction of the corner reflector 1 is toward the direction of the cutting knife 1001; when the corner reflector 1 stops rotating and the centrifugal force disappears, the torsion spring 1002 drives the cutting knife 1001 to be stored under the corner reflector 1, and the rotation direction is also toward the direction of the cutting knife, and the storage angle of the cutting knife 1001 is limited by the second stopper 1004; By symmetrically arranging two groups of weeding components 10, when the corner reflector 1 drives the weeding component 10 to rotate, balance is maintained, thereby preventing a single weeding component 10 from causing the center of the corner reflector 1 to shift during rotation, causing the corner reflector 1 to shake during rotation, and affecting the reset accuracy of the corner reflector 1; and after the weeding component 10 is set at the diagonal position of the corner reflector 1, the cutting range of the cutting knife 1001 can be expanded under the same length of the cutting knife 1001.

[0053] Specifically, the weeding component 10 is detachably mounted on the lower surface of the corner reflector 1 through the mounting plate 1005. The mounting plate 1005 is fixed to the lower surface of the corner reflector 1 by multiple bolts. The rotating shaft, the first stop block 1003 and the second stop block 1004 are all fixed to the lower surface of the mounting plate 1005.

[0054] It can be understood that after the weeding component 10 is detachably installed under the corner reflector 1 through the mounting plate 1005, it is convenient to install and disassemble the corner reflector 1. When weeds are likely to appear at the installation position of the corner reflector 1, the weeding component 10 is installed to perform weeding. When weeds will not appear at the installation position of the corner reflector 1, the weeding component 10 can be removed.

[0055] Specifically, a human proximity sensor 12 is fixed to the upper end of the pole 901 .

[0056] It can be understood that by setting up a human proximity sensor 12, it is possible to monitor whether someone is approaching the corner reflector 1. When a person is detected approaching the corner reflector 1, the cleaning, drying and weeding procedures are not performed to avoid accidental injury to the person approaching the corner reflector 1.

[0057] In the present invention, a plurality of corner reflectors 1 are installed in the detected area through the base 2, and a vertical pole 901 and a visual camera 9 are installed on the side of the corner reflector 1. After the arrangement is completed, SAR images of the monitored area are taken by SAR radars carried by a plurality of orbiting satellites. The position of the corner reflector 1 in the image is the clearest, and the coordinates of each corner reflector 1 are recorded from different angles. When the orbiting satellite passes over the detected area, it takes a picture and records the coordinates of each picture, so as to monitor whether the monitored area has subsided. By setting the visual camera 9, the dirtiness of the surface of the corner reflector 1 is monitored. When it is necessary During cleaning, the water in the water storage chamber 201 is transported to the inside of the flushing head 501 through the hollow shaft 3 and the connecting pipe 502 by the water pump, and is sprayed out through the water spray hole to flush the dirt on the surface of the corner reflector 1, thereby avoiding affecting the reflection of electromagnetic waves. After cleaning, the electric push rod drives the positioning plate 701 to disengage from the positioning rod 702, releases the limit of the corner reflector 1, and drives the drive motor and the two gears to drive the corner reflector 1 to rotate in the direction of the blade of the cutting knife 1001. The centrifugal force is generated by the rotation of the corner reflector 1, thereby throwing out the residual water on the surface of the corner reflector 1, so that the corner reflector 1 can be quickly restored. The corner reflector 1 is then dried again to prevent the moisture on its surface from causing more dust contamination. At the same time, when the visual camera 9 finds that a part of the corner reflector 1 is dirty and not cleaned, the dirty part of the corner reflector 1 is rotated to a position corresponding to the water-permeable notch 602. The electric push rod drives the cover plate 601 to fit the inner wall of the cleaning head, so that the water is filled above the cover plate 601. Since the cover plate 601 blocks the water spray hole of the flushing head 501, water can only be sprayed out through the water spray hole corresponding to the water-permeable notch 602. Since the water outlet area is reduced, the water outlet pressure of the water spray hole is increased, thereby performing high-pressure flushing. When the corner reflector 1 rotates, the corner reflector 1 is rotated. During the process, the centrifugal force generated drives the cutting knife 1001 to rotate on the surface of the rotating shaft, so that the cutting knife 1001 extends from under the corner reflector 1 and is limited by the first stop block 1003. When the two cutting knives 1001 are rotated and unfolded, the weeds around the corner reflector 1 are cut to prevent the weeds from blocking the corner reflector 1 after growing tall and affecting the corner reflector 1 from reflecting electromagnetic waves. After drying, the corner reflector 1 stops rotating, and the corner reflector 1 is positioned by the corresponding positioning sensor 8, and the corner reflector 1 is limited by the positioning plate 701 mounted on the surface of the positioning rod 702, and the corner reflector 1 is accurately reset.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

[0059] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0060] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A settlement monitoring device based on InSAR, characterized in that: The invention comprises a plurality of SAR radars capable of emitting electromagnetic waves and a plurality of corner reflectors (1) located in a monitored area, wherein the plurality of corner reflectors (1) are distributed at intervals in the monitored area, the corner reflectors (1) are fixed to the ground via a base (2), a flushing assembly (5) for cleaning the corner reflectors (1) is provided on the top of the corner reflectors (1), a water storage chamber (201) for supplying water to the flushing assembly (5) is provided inside the base (2), and a pressurizing assembly (6) for high-pressure flushing of local dirt on the corner reflectors (1) is provided inside the flushing assembly (5).

2. The InSAR-based settlement monitoring device according to claim 1, characterized in that: A hollow shaft (3) is fixed in the middle of the base (2), and the upper end of the hollow shaft (3) is connected to a flushing assembly (5). The flushing assembly (5) comprises a flushing head (501) mounted on the upper end of the hollow shaft (3) via a connecting pipe (502) and a connecting sleeve (503). The connecting pipe (502) is fixed to the bottom of the flushing head (501), and the connecting sleeve (503) is sleeved on the surface of the flushing head (501). The connecting sleeve (503) is threadedly connected to the upper end of the hollow shaft (3).

3. The InSAR-based settlement monitoring device according to claim 2, characterized in that: A plurality of water spray holes are provided on the surface of the flushing head (501), and the water spray paths of the water spray holes cover the corner reflectors (1).

4. The InSAR-based settlement monitoring device according to claim 2, characterized in that: The corner reflector (1) rotates on the surface of the hollow shaft (3), the corner reflector (1) is driven to rotate by a driving motor, the corner reflector (1) rotates on the surface of the base (2) through a rotating component (4), and the corner reflector (1) dries moisture on the surface through rotation.

5. The InSAR-based settlement monitoring device according to claim 2, characterized in that: The pressurizing assembly (6) comprises a covering plate (601) arranged inside the flushing head (501), the covering plate (601) matches the inside of the flushing head (501), and a water-permeable notch (602) for water flow is provided on the surface of the flushing head (501).

6. The InSAR-based settlement monitoring device according to claim 5, characterized in that: A sealing strip (603) is provided at the edge of the covering plate (601). When the covering plate (601) is in contact with the inner wall of the flushing head (501), the upper end of the connecting pipe (502) is located inside the covering plate (601) through the water-permeable notch (602), and the covering plate (601) is pressed against the inner wall of the flushing head (501) by water pressure.

7. The InSAR-based settlement monitoring device according to claim 4, characterized in that: The surface of the base (2) is provided with a positioning assembly (7) for positioning the angle of the corner reflector (1), the positioning assembly (7) comprising a positioning plate (701) that slides vertically on the surface of the base (2) via a guide rod (703) and a positioning rod (702) that is fixed to the lower surface of the corner reflector (1).

8. The InSAR-based settlement monitoring device according to claim 1, characterized in that: Two groups of weeding components (10) are symmetrically arranged on the lower surface of the corner reflector (1), and the two groups of weeding components (10) are respectively located at diagonal positions of the corner reflector (1).

9. The InSAR-based settlement monitoring device according to claim 8, characterized in that: The weeding assembly (10) comprises a cutting knife (1001) that is rotated on the lower surface of a corner reflector (1) via a rotating shaft, the surface of the rotating shaft being provided with a torsion spring (1002) for driving the cutting knife (1001) to rotate below the corner reflector (1), and the lower surface of the corner reflector (1) being provided with a first stopper (1003) for limiting the deployment angle of the cutting knife (1001) and a second stopper (1004) for limiting the storage angle of the cutting knife (1001).

10. The InSAR-based settlement monitoring device according to claim 1, characterized in that: A visual camera (9) for monitoring the dirtiness of the surface of the corner reflector (1) is provided on one side of the corner reflector (1).

Images