CN211147643U - Earth surface settlement monitoring system based on high-resolution remote sensing satellite - Google Patents
Earth surface settlement monitoring system based on high-resolution remote sensing satellite Download PDFInfo
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- CN211147643U CN211147643U CN202020063193.6U CN202020063193U CN211147643U CN 211147643 U CN211147643 U CN 211147643U CN 202020063193 U CN202020063193 U CN 202020063193U CN 211147643 U CN211147643 U CN 211147643U
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Abstract
The utility model provides a surface subsides monitoring system based on high score remote sensing satellite, including subsiding reference point and the measuring device outside the region, wherein measuring device includes support, motor, fastening knob, distancer, pin, calibration ball, communication box. The motor is installed on the bracket through the fastening knob, the range finder is installed on an output shaft of the motor through a pin, the calibration ball is hinged to the bottom surface of the tail end of the range finder, and laser emitted by the calibration ball is always horizontally forwards; a calibration laser receiver is arranged on the bottom surface of the front end of the range finder; the head end face of the range finder is provided with a range finding laser emitter and a range finding laser receiver; the communication box is arranged on the top surface of the horizontal plate at the bottom of the bracket, and the processor and the communication element are arranged in the communication box. The measuring device is arranged at a serious point position of a settlement area monitored by the high-resolution remote sensing satellite, the vertical distance between a reference point outside the settlement area and a monitoring point is measured by utilizing a trigonometric function, and when the settlement distance and the settlement speed exceed respective threshold values, a warning signal is sent to a system background.
Description
Technical Field
The utility model relates to a monitoring system especially relates to a surface subsidence monitoring system based on high branch remote sensing satellite.
Background
The high-resolution remote sensing satellite earth observation technology can form an all-weather, all-time and global coverage earth observation system with high space, high time and high spectral resolution. The construction of the high-resolution earth observation system has great significance for promoting the construction of Chinese space infrastructure, the application of cultivating satellites and the development of strategic emerging industries. With the construction of high-grade special projects, the monitoring precision of high-grade satellites reaches the sub-meter level, and common satellite data is replaced by high-grade special data. High-grade data is widely applied in the fields of the industries such as homeland, surveying and mapping, agriculture, forestry and environmental protection, the autonomous acquisition of multispectral, hyperspectral and sub-meter visible light and SAR radar satellite remote sensing data is realized, and information service and decision support are provided for important fields such as disaster prevention and relief, government control and ecological environment monitoring.
At present, the number of cities suffering from ground subsidence is increasing continuously, the ground subsidence causes various disasters, such as seawater invasion or storm surge, and various geological disasters caused by ground subsidence are important factors which seriously restrict urban progress, not only cause urban land resource crisis, but also cause a series of ecological environment problems, destroy production and living facilities, and further possibly cause social and economic problems. Utilize high resolution to earth observation technique, can in time discover the earth's surface settlement region through contrasting the three-dimensional image change in earth's surface, but because its cost is higher, be applicable to regional three-dimensional image more and acquire, can't realize the tracking of a plurality of specific point locations to the measuring error that the precision of sub-meter level produced still can influence monitoring effect, so necessary to set up monitoring devices at the serious point of earth's surface settlement, supplementary high resolution is to earth observation technique realization and is subsiding regional comprehensive effective monitoring to the earth's surface.
Therefore, the high-resolution remote sensing satellite-based ground surface settlement monitoring system is designed, a ground surface settlement area is found out by utilizing a high-resolution ground observation technology, a practical and effective ground monitoring device is arranged at a serious point of the ground surface settlement area, and the ground surface settlement monitoring system integrating heaven and earth features is formed, so that auxiliary decision support is provided for geological disaster prevention and control and disaster reduction work, the geological disaster forecast early warning capability and prevention and control level are improved, and the development process of a smart city is further promoted.
Disclosure of Invention
Therefore, the utility model discloses a realize the earth's surface settlement monitoring, utilize the high resolution to survey the technique to ground, acquire the earth's surface settlement region according to the three-dimensional image of shooting earlier, then at the serious position installation monitoring devices who subsides the region, realize the comprehensive effective monitoring that the earth's surface subsides.
The utility model adopts the technical proposal that: earth's surface settlement monitoring system based on high score remote sensing satellite, its characterized in that: the device comprises a reference point outside a settlement region and a measuring device, wherein the measuring device comprises a bracket, a motor, a fastening knob, a distance measuring instrument, a pin, a calibration ball and a communication box.
The observation points outside the settlement region are marked on a building with a certain height outside the settlement region.
The measuring device is installed at the most severe point in the settlement zone.
The support is a vertical triangular frame, a horizontal cuboid flat plate is arranged at the bottom of the triangular frame, and two sides of the flat plate are screwed on the ground; a regular hexagon motor mounting hole is horizontally penetrated through the triangular frame close to the top end.
A regular hexagon fixing column is arranged in the center of the vertical face of the inner side of the motor shell of the motor, the fixing column is inserted into a motor mounting hole of the support, and a threaded hole is formed in the outer end face of the fixing column inwards; an output shaft of the motor extends out of the center of the vertical face of the outer side of the motor, and a pin hole penetrates through the output shaft.
Further, the motor is a low-speed stepping motor, and the angular displacement is controlled by controlling the number of pulses.
Furthermore, the length of the fixing column is 2-3 mm smaller than the thickness of the support.
Further, the outline of the fixing column is the same as the outline of the motor mounting hole in size.
The fastening knob is a flat cylinder with a horizontal central axis, a horizontal threaded column extends out of the center of a vertical surface on one side of the flat cylinder, and the threaded column is installed in a threaded hole of the fixing column; a plurality of knob raised lines are uniformly distributed on the outer cylindrical surface of the flat cylinder around the central axis of the fastening knob.
Further, the axis of the knob convex strip is parallel to the central axis of the fastening knob.
The tail end of the range finder horizontally penetrates through a circular driving hole in the left-right direction, and a through hole is formed in the end face of the tail part of the range finder and is communicated with the driving hole; the driving hole of the distance meter is sleeved on the output shaft of the motor, the pin sequentially penetrates through the through hole and the pin hole from outside to inside, and the distance meter is assembled on the output shaft of the motor.
The bottom surface of the range finder is close to the tail part and is provided with a U-shaped suspension bracket with a horizontal middle part and two upwards bent ends, and a calibration ball is sleeved on the suspension bracket; the calibration ball is a sphere, a horizontal round tubular suspension pipe is arranged at the top of the sphere, and the suspension pipe is sleeved on the horizontal section of the suspension bracket; and a calibration laser emitter is arranged on the spherical surface at the front end of the calibration ball.
Furthermore, metal lead is filled in the calibration ball, and when the distance measuring instrument rotates, laser emitted by a calibration laser emitter of the calibration ball always moves forwards horizontally.
Further, in the specific implementation, the suspension bracket can be bent and installed on the bottom surface of the distance measuring instrument after penetrating through the suspension pipe of the calibration ball.
The bottom surface of the range finder is close to the head end, a vertical plate-shaped calibration plate is arranged perpendicular to the bottom surface, a calibration laser receiver is mounted on the back surface of the calibration plate, and when the range finder rotates to a horizontal angle, the calibration laser receiver just receives laser emitted by a calibration laser emitter of a calibration ball.
And a distance measuring laser transmitter and a distance measuring laser receiver are arranged on the head end surface of the distance measuring instrument.
The communication box is screwed on the top surface of the flat plate of the support, the top surface of the communication box is provided with a communication antenna, a communication circuit is arranged in the communication box, an SIM card is arranged in the communication circuit, an MCU processor is arranged in the communication box, a timer and a memory are connected with the MCU processor, and the MCU processor is connected with the communication circuit.
Further, when the power supply is implemented, the mains supply can be adopted to directly supply power to the power consumption element, and the storage battery is used under the condition of no mains supply.
The principle of the utility model is that the distance meter is a laser distance meter, a distance measuring laser emitter of the distance meter emits laser to a reference point outside the settlement area, a distance measuring laser receiver receives the reflected laser, the fixed propagation speed v of the laser in the air can calculate the distance L between the distance meter and the reference point outside the settlement area by recording the time difference t of emitting and receiving the laser, namely the distance L = Δ t v/2.
After a calibration laser receiver of the range finder receives laser emitted by a calibration laser emitter, the range finder is in a horizontal state, the rotating angle of the range finder is recorded, and when the ranging laser emitter of the range finder irradiates a reference point outside a settlement region, the rotating angle a of the range finder is finally obtained.
Then the vertical height difference between the reference point outside the settling zone and the rangefinder H = L sin (a).
By the method, the vertical height Hi between the reference point outside the settling area and the range finder is respectively calculated, and the vertical height Hj between the reference point outside the settling area and the range finder is calculated after a period of time, so that the apparent settling value H in the period of time can be obtained.
The utility model relates to a surface subsidence monitoring system based on high branch remote sensing satellite has following advantage:
(1) the high-resolution remote sensing satellite is used for analyzing earth surface images in a large range, so that the image analysis difficulty is reduced;
(2) according to the image analysis of the high-resolution remote sensing satellite, a monitoring device is arranged at the point with strict settlement, so that the defect that the multi-point monitoring cost of the remote sensing satellite is too high is overcome;
(3) and calculating the vertical heights of the reference point and the monitoring point outside the settlement region in sequence by using a horizontal calibration structure and a trigonometric function principle so as to obtain a settlement value within a period of time.
Therefore, the ground surface settlement monitoring system based on the high-resolution remote sensing satellite finds out a ground surface settlement area by utilizing a high-resolution ground observation technology, and sets a practical and effective ground monitoring device at a serious point of the ground surface settlement area to form a ground surface settlement monitoring system integrating heaven and earth with things, so that auxiliary decision support is provided for geological disaster prevention and control and disaster reduction, the geological disaster forecast early warning capability and prevention level are improved, and the development process of a smart city is further promoted.
Other features and advantages of the invention will be set forth in the description which follows, or may be learned by practice of the invention.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
FIG. 1 is a schematic view of an assembly structure of a motor, a distance measuring instrument and a pin.
Fig. 2 is a schematic view of the assembly structure of the bracket, the motor and the fastening knob.
Fig. 3 is a bottom assembly view of the unitary assembly.
FIG. 4 is a schematic view of the assembly of the calibration ball to the bottom of the rangefinder.
Fig. 5 is a schematic diagram of a calibration sphere.
FIG. 6 is a schematic view of the structure of the suspension bracket at the bottom of the rangefinder.
Fig. 7 is a schematic structural view of a calibration plate at the bottom of the range finder.
Fig. 8 is a schematic view of an assembled structure of the communication box.
Figure 9 is a disassembled schematic view of the pin and rangefinder, motor.
Figure 10 is a disassembled schematic view of the rangefinder and motor.
Fig. 11 is a schematic view of the pin structure.
Fig. 12 is a disassembled schematic view of the fastening knob and the motor, bracket.
Fig. 13 is a disassembled schematic view of the motor and the bracket.
Fig. 14 is a schematic view of the structure of the tightening knob.
Fig. 15 is a schematic structural view of the stent.
Fig. 16 is a schematic front view of the unitary assembly in horizontal alignment.
Fig. 17 is a schematic front view of the integrated assembly in the measurement of the distance between the monitoring point and the reference point.
Fig. 18 is a schematic diagram of a manner of calculating the sedimentation height.
Fig. 19 is a schematic diagram of the connection of elements within the communication box.
Fig. 20 is a schematic view of the monitoring method.
The reference numbers in the figure are 1-bracket, 101-flat plate, 102-motor mounting hole, 2-motor, 201-fixed column, 202-threaded hole, 203-output shaft, 204-pin hole, 3-fastening knob, 301-threaded column, 302-knob raised line, 4-distance meter, 401-driving hole, 402-through hole, 403-suspension bracket, 404-calibration plate, 405-calibration laser receiver, 406-distance measurement laser transmitter, 407-distance measurement laser receiver, 5-pin, 501-nut raised line, 6-calibration ball, 601-suspension tube, 602-calibration laser transmitter, 7-communication box, 701-communication antenna, ith-time monitored measuring device position, Aj-jth time monitored measuring device position, B-reference point outside subsidence area, L i-ith time measuring device and reference point linear distance, L j-jth time measuring device and reference point linear distance, Ai-L i and horizontal line included angle, Aj-L j-hij-horizontal line included angle, Ai-j-h j and Ai-h j-horizontal line height included angle, Ai-B-h line height included angle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments, wherein the present invention is based on a high-resolution remote sensing satellite.
Earth's surface settlement monitoring system based on high score remote sensing satellite, its characterized in that: the device comprises a reference point outside a settlement region and a measuring device, wherein the measuring device comprises a bracket 1, a motor 2, a fastening knob 3, a distance measuring instrument 4, a pin 5, a calibration ball 6 and a communication box 7.
As shown in fig. 18, the observation points outside the settlement region are marked on a building having a certain height outside the settlement region.
The measuring device is installed at the most severe point in the settlement zone.
As shown in fig. 1, 2, 3, 13 and 15, the support 1 is a vertical triangular frame, a horizontal rectangular parallelepiped flat plate 101 is arranged at the bottom of the triangular frame, and both sides of the flat plate 101 are screwed on the ground; a regular hexagonal motor mounting hole 102 is horizontally penetrated through the triangular frame near the top end.
As shown in fig. 1, 2, 3, 10 and 13, a regular hexagonal fixing column 201 is provided at the center of an inner vertical surface of a casing of the motor 2, the fixing column 201 is inserted into the motor mounting hole 102 of the bracket 1, and a threaded hole 202 is formed inward on an outer end surface of the fixing column 201; an output shaft 203 of the motor 2 extends out of the center of the outer vertical surface of the motor 2, and a pin hole 204 penetrates through the output shaft 203.
Further, the motor 2 is a low-speed stepping motor, and the angular displacement is controlled by controlling the number of pulses.
Further, the length of the fixing column 201 is 2-3 mm smaller than the thickness of the support 1.
Further, the contour of the fixing column 201 is the same as the contour of the motor mounting hole 102 in size.
As shown in fig. 2, 12 and 13, the fastening knob 3 is a flat cylinder with a horizontal central axis, a horizontal threaded column 301 extends out of the center of a vertical plane on one side of the flat cylinder, and the threaded column 301 is installed in a threaded hole 202 of the fixed column 201 to fix the motor 2 on the bracket 1; a plurality of knob ribs 302 are uniformly distributed on the outer cylindrical surface of the flat cylinder around the central axis of the fastening knob 3.
Further, as shown in fig. 14, the axis of the knob rib 302 is parallel to the central axis of the tightening knob 3.
Further, the length of the threaded post 301 is less than the depth of the threaded hole 202.
As shown in fig. 1, 9, 10 and 11, the rear end of the distance meter 4 horizontally penetrates through a circular driving hole 401 in the left-right direction, and a through hole 402 is formed in the end face of the rear end of the distance meter 4 and is communicated with the driving hole 401; the driving hole 401 of the distance measuring instrument 4 is sleeved on the output shaft 203 of the motor 2, the pin 5 sequentially penetrates through the through hole 402 and the pin hole 204 from outside to inside, and the distance measuring instrument 4 is assembled on the output shaft 203 of the motor 2.
Further, a plurality of nut convex strips 501 are uniformly distributed on the periphery of the nut of the pin 5 around the central axis of the pin, so that the pin 5 can be screwed out or in from the pin hole 204 by a worker conveniently.
Further, the axial direction of the nut projection 501 is parallel to the central axis of the pin 5.
As shown in fig. 3, 4, 5, and 6, the bottom surface of the distance meter 4 is close to the tail, and is provided with a U-shaped suspension bracket 403 having a horizontal middle and two upward bent ends, and the suspension bracket 403 is sleeved with a calibration ball; the calibration ball 6 is a sphere, a horizontal round tubular suspension pipe 601 is arranged at the top of the sphere, and the suspension pipe 601 is sleeved on the horizontal section of the suspension bracket 403; the front spherical surface of the calibration ball 6 is provided with a calibration laser transmitter 602.
Further, the calibration ball 6 is filled with metal lead, and when the distance measuring device rotates, the laser emitted by the calibration laser emitter 602 of the calibration ball 6 is always horizontally forward.
Further, in the implementation, the suspension bracket 403 may be bent and mounted on the bottom surface of the distance measuring device 4 after passing through the suspension tube 601 of the calibration ball 6.
As shown in fig. 3 and 7, the bottom surface of the distance measuring instrument 4 is close to the head end, a vertical plate-shaped calibration plate 404 is arranged perpendicular to the bottom surface, a calibration laser receiver 405 is mounted on the back surface of the calibration plate 404, and when the distance measuring instrument 4 rotates to a horizontal angle, the calibration laser receiver 405 just receives laser emitted by a calibration laser emitter 602 of the calibration ball 6.
As shown in fig. 2 and 3, a distance measuring laser transmitter 406 and a distance measuring laser receiver 407 are provided on the head end surface of the distance measuring instrument 4.
As shown in fig. 1, 8 and 19, the communication box 7 is screwed on the top surface of the flat plate of the bracket 1, the top surface of the communication box 7 is provided with a communication antenna 701, the communication box 7 is provided with a communication circuit, the communication circuit is provided with a SIM card, the communication box 7 is provided with an MCU processor, and a timer and a memory are connected with the MCU processor, and the MCU processor is connected with the communication circuit.
Further, when the power supply is implemented, the mains supply can be adopted to directly supply power to the power consumption element, and the storage battery is used under the condition of no mains supply.
The distance meter 4 is a laser distance meter, a distance measuring laser transmitter 406 of the distance meter 4 transmits laser to a reference point outside the settlement area, and the distance measuring laser receiver 407 receives the reflected laser, the propagation speed v of the laser in the air is fixed, and the distance L between the distance meter and the reference point outside the settlement area can be calculated by recording the time difference t of transmitting and receiving the laser, namely the distance L = t v/2.
After the calibration laser receiver 405 of the range finder 4 receives the laser emitted by the calibration laser emitter 602, it indicates that the range finder 4 is in a horizontal state, and starts to record the rotation angle of the range finder 4, and when the ranging laser emitter 406 of the range finder 4 irradiates the reference point outside the settlement region, the final rotation angle a of the range finder 4 is obtained.
Then the vertical height difference between the reference point outside the settling area and the rangefinder 4H = L sin (a).
Based on the method, the vertical height Hi between the reference point outside the settling area and the range finder 4 is calculated respectively, and the vertical height Hj between the reference point outside the settling area and the range finder 4 is calculated after a period of time, so that the apparent settling value H in the period of time T can be obtained.
Therefore, the method for monitoring the ground surface settlement based on the high-resolution remote sensing satellite comprises the following steps:
(1) shooting a ground surface image by using a high-resolution remote sensing satellite to obtain a large-range ground surface settlement area;
(2) arranging a monitoring device at a serious settlement point;
(3) controlling the motor 2 to rotate, recording the distance L i between the ith measuring device and the reference point and the included angle ai between the distance L i and the horizontal line, and calculating the vertical height Hi, Hi = L i sin (ai) between the reference point B and the monitoring point;
(4) after a period of time, controlling the motor 2 to rotate, recording the distance L j between the jth measuring device and the reference point and the included angle aj between the distance L j and the horizontal line, and calculating the vertical height Hj between the reference point B and the monitoring point, wherein Hj = L j × sin (aj);
(5) calculating the settlement value H = Hj-Hi of the monitoring point at the time, and sending out a warning signal when the settlement value H exceeds a threshold value;
(6) calculating the time difference between the ith monitoring and the jth monitoring, wherein T = Tj-Ti;
(7) and calculating the settling speed V = Δ H/Δ T of the monitoring point at the time, and sending a warning signal when V exceeds the threshold.
Further, after the MCU judges that the settling value H or the settling speed V exceeds the threshold value, the MCU controls the communication circuit to send out a warning signal to a system background, and after the monitoring mechanism receives the warning signal, the monitoring mechanism timely carries out work of transferring personnel and property and the like.
Further, the MCU in the specification refers to a microprocessing unit.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (9)
1. Earth's surface settlement monitoring system based on high score remote sensing satellite, its characterized in that: the device comprises a reference point outside a settlement region and a measuring device, wherein the measuring device comprises a bracket (1), a motor (2), a fastening knob (3), a range finder (4), a pin (5), a calibration ball (6) and a communication box (7);
the observation points outside the settlement region are marked on a building with a certain height outside the settlement region;
the measuring device is arranged at the most serious point in the sedimentation region;
the support (1) is a vertical triangular frame, a horizontal cuboid flat plate (101) is arranged at the bottom of the triangular frame, and two sides of the flat plate (101) are screwed on the ground; a regular hexagonal motor mounting hole (102) is horizontally penetrated on the triangular frame close to the top end;
a regular hexagon fixing column (201) is arranged in the center of the vertical face of the inner side of the shell of the motor (2), the fixing column (201) is inserted into a motor mounting hole (102) of the support (1), and a threaded hole (202) is formed in the outer end face of the fixing column (201) inwards; an output shaft (203) of the motor (2) extends out of the center of the outer vertical surface of the motor (2), and a pin hole (204) penetrates through the output shaft (203);
the fastening knob (3) is a flat cylinder with a horizontal central axis, a horizontal threaded column (301) extends out of the center of a vertical surface on one side of the flat cylinder, the threaded column (301) is installed in a threaded hole (202) of the fixing column (201), and the motor (2) is fixed on the bracket (1); a plurality of knob convex strips (302) are uniformly distributed on the outer cylindrical surface of the flat cylinder around the central axis of the fastening knob (3);
the tail end of the distance measuring instrument (4) horizontally penetrates through a circular driving hole (401) in the left-right direction, and a through hole (402) is formed in the end face of the tail part of the distance measuring instrument (4) and is communicated with the driving hole (401); the driving hole (401) of the distance meter (4) is sleeved on the output shaft (203) of the motor (2), the pin (5) sequentially penetrates through the through hole (402) and the pin hole (204) from outside to inside, and the distance meter (4) is assembled on the output shaft (203) of the motor (2);
the bottom surface of the range finder (4) is close to the tail part and is provided with a U-shaped suspension bracket (403) which is horizontal in the middle and is bent upwards at two ends, and a calibration ball is sleeved on the suspension bracket (403); the calibration ball (6) is a ball body, a horizontal round tubular suspension pipe (601) is arranged at the top of the ball body, and the suspension pipe (601) is sleeved on the horizontal section of the suspension bracket (403); a calibration laser emitter (602) is arranged on the spherical surface at the front end of the calibration ball (6);
the bottom surface of the range finder (4) is close to the head end, a vertical plate-shaped calibration plate (404) is arranged perpendicular to the bottom surface, a calibration laser receiver (405) is arranged on the back surface of the calibration plate (404), and when the range finder (4) rotates to a horizontal angle, the calibration laser receiver (405) just receives laser emitted by a calibration laser emitter (602) of a calibration ball (6);
a distance measuring laser transmitter (406) and a distance measuring laser receiver (407) are arranged on the head end face of the distance measuring instrument (4);
the communication box (7) is screwed on the top surface of the flat plate (101) of the support (1), the top surface of the communication box (7) is provided with a communication antenna (701), the communication box (7) is internally provided with a communication circuit, the communication circuit is internally provided with an SIM card, the communication box (7) is internally provided with an MCU processor, a timer and a memory are additionally connected with the MCU processor, and the MCU processor is connected with the communication circuit.
2. The high-resolution remote sensing satellite-based surface subsidence monitoring system of claim 1, wherein: the motor (2) is a low-rotating-speed angular displacement stepping motor.
3. The high-resolution remote sensing satellite-based surface subsidence monitoring system of claim 1, wherein: the length of the fixing column (201) is 2-3 mm smaller than the thickness of the support (1).
4. The high-resolution remote sensing satellite-based surface subsidence monitoring system of claim 1, wherein: the contour of the fixing column (201) is the same as the contour of the motor mounting hole (102).
5. The high-resolution remote sensing satellite-based surface subsidence monitoring system of claim 1, wherein: the axis of the knob convex strip (302) is parallel to the central axis of the fastening knob (3).
6. The high-resolution remote sensing satellite-based surface subsidence monitoring system of claim 1, wherein: the length of the threaded column (301) is smaller than the depth of the threaded hole (202).
7. The high-resolution remote sensing satellite-based surface subsidence monitoring system of claim 1, wherein: the periphery of the nail cap of the pin (5) is uniformly distributed with a plurality of nail cap convex strips (501) around the central axis.
8. The high-resolution remote sensing satellite-based surface subsidence monitoring system of claim 7, wherein: the axial direction of the nail cap convex strip (501) is parallel to the central axis of the pin (5).
9. The high-resolution remote sensing satellite-based surface subsidence monitoring system of claim 1, wherein: the calibration ball (6) is filled with metal lead, and when the distance measuring instrument rotates, laser emitted by a calibration laser emitter (602) of the calibration ball (6) is always horizontally forward.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102962A (en) * | 2020-01-13 | 2020-05-05 | 厦门精图信息技术有限公司 | Ground surface settlement monitoring system and method based on high-resolution remote sensing satellite |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111102962A (en) * | 2020-01-13 | 2020-05-05 | 厦门精图信息技术有限公司 | Ground surface settlement monitoring system and method based on high-resolution remote sensing satellite |
| CN111102962B (en) * | 2020-01-13 | 2024-05-14 | 厦门精图信息技术有限公司 | High-resolution remote sensing satellite-based earth surface subsidence monitoring system and method |
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