CN113625229A - Permanent scattering point device - Google Patents
Permanent scattering point device Download PDFInfo
- Publication number
- CN113625229A CN113625229A CN202111040325.9A CN202111040325A CN113625229A CN 113625229 A CN113625229 A CN 113625229A CN 202111040325 A CN202111040325 A CN 202111040325A CN 113625229 A CN113625229 A CN 113625229A
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- corner reflector
- main body
- point device
- scattering point
- hollow tube
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- 238000004891 communication Methods 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a permanent scattering point device, which is characterized in that: comprises a main body part, a movable part and a corner reflector part; the corner reflector part is fixed at the upper end of the main body part; the movable part is positioned at the lower end of the main body part; the main body part comprises a hollow tube and a sensor module; the sliding part comprises a sliding rod and a fin assembly, and the fin assembly is arranged at the lower end of the sliding rod; the slide rod is slidably inserted into a hollow tube of the main body portion, and the sensor module is disposed in the hollow tube to detect a vertical movement of the slide rod within the hollow tube. The device for settling permanent scattering points is inserted into the ground of a place to be detected and buried. When landslide occurs, the sensor module can send detected signals to an external communication device, so that the measurement precision of the ground-based synthetic aperture radar system is improved as auxiliary data, and false alarm is reduced.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a permanent scattering point device.
Background
In the last decade, the serious consequences of death or missing of nearly ten thousand people are caused by frequent geological disasters in China, and geological disasters such as landslide and debris flow. In the early warning of various disaster accidents, the state of the target can be judged and early warned only by accurately measuring the weak deformation of the target. The deformation measurement precision of a Ground-based Synthetic Aperture Radar system (GBSAR) is high, and the submillimeter-level target weak deformation can be measured. Moreover, the device has surface observation capability and can monitor deformation of a region with several square kilometers. More importantly, the GBSAR can acquire the deformation of a target at a long distance in a remote sensing mode. This avoids danger during deformation monitoring. Therefore, the technology becomes a hot spot of research on the radar technology of a new system.
The Permanent Scatterer (PS) technique is to select strong scattering points (PS points) with strong phase stability and small change among images based on a radar interference phase diagram and based on a statistical principle. Then, a method for constructing a triangular network is adopted, the strong scattering points are connected to form a network, phase unwrapping is carried out, and phase changes of the points are obtained. Finally, deformation information of the monitoring area is obtained. Wherein, the selection of the permanent scattering point is the key for realizing high-precision deformation monitoring.
If the position between the corresponding targets in the two radar images varies greatly, there is no correlation between them. At this time, the interference pattern between them cannot be obtained by direct conjugate multiplication. For example, when the target area to be monitored is a forest or a marsh, the target area to be monitored is unstable, and the correlation between radar images is low. At this time, it is difficult for the radar interferogram obtained by direct conjugate multiplication to reflect the deformation information of the target. Therefore, in order to obtain a relevant radar interference image, a stable control point needs to be set in the monitoring area. These points are called permanent scattering points, and the amplitude and phase of their echoes are generally stable and can be kept constant for a long time. The correlation of these points is strong in different radar images obtained at different times. By measuring the radar echo signals of the permanent scattering points, the accuracy of the GBSAR echo phase measurement can be improved. Even if the position of the permanent scattering point is unchanged. The echo of the corner reflector received by the system can be influenced by external noise in each imaging experiment. Therefore, echoes of permanently scattered points whose positions have not changed may also have a weak phase change under the influence of noise. The technical problem to be solved in the field is how to improve the deformation measurement accuracy of the ground-based synthetic aperture radar system by integrating different test data, which leads to system misjudgment.
Disclosure of Invention
The invention aims to solve the technical problem of providing a permanent scattering point device which can detect ground settlement displacement so as to improve the measurement precision of a ground-based synthetic aperture radar system.
In order to solve the technical problems, the invention adopts the technical scheme that:
a permanent scattering point device comprises a main body part, a movable part and a corner reflector part; the corner reflector part is fixed at the upper end of the main body part; the movable part is positioned at the lower end of the main body part; the main body part comprises a hollow tube and a sensor module; the sliding part comprises a sliding rod and a fin assembly, and the fin assembly is arranged at the lower end of the sliding rod; the slide rod is slidably inserted into a hollow tube of the main body portion, and the sensor module is disposed in the hollow tube to detect a vertical movement of the slide rod within the hollow tube.
The corner reflector part comprises a corner reflector and a corner reflector mounting seat, and the corner reflector is fixed on the corner reflector mounting seat; the corner reflector mount is coupled to an upper portion of the body portion to fix the body portion.
The sensor module is connected to an external communication device via an electrical signal line.
The sensor module is a position sensor.
The fin assembly includes a base and a plurality of fins disposed on the base.
The fins are shown as outwardly extending tabs.
The body portion further includes a resilient support member for supporting the slide bar.
The elastic supporting piece adopts a spring.
The spring is located between the top of the slide rod and a stop inside the hollow tube.
Compared with the prior art, the invention has the beneficial effects that:
the permanent scattering point device comprises a main body part and a movable part, and a sensor module for detecting the vertical movement of the movable part is arranged in the main body part. When landslide occurs, the sensor module can send a detected displacement change signal to an external communication device, so that the measurement precision of the ground-based synthetic aperture radar system is improved as auxiliary data, and false alarm is reduced.
Drawings
FIG. 1 is a schematic diagram of the construction of the permanent scattering point device of the present invention;
fig. 2 is a sectional view of fig. 1.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
one embodiment of the inventive permanent scattering point device, as shown in fig. 1 and 2, includes a main body portion 10, a movable portion 30, and a corner reflector portion. The corner reflector portion is fixed to the upper end of the body portion 10; the movable portion 30 is located at the lower end of the body portion 10.
The body portion 10 includes a hollow tube 11 and a sensor module 12.
The sliding portion 30 includes a sliding rod 31 and a fin assembly 32, and the fin assembly 32 is provided at a lower end of the sliding rod 31.
The slide rod 31 is slidably inserted into the hollow tube 11 of the main body portion 10. Sensor module 12 is disposed within hollow tube 11 to detect vertical movement of slide rod 31 within hollow tube 11.
The sliding unit 30 is configured to move downward when a mountain landslide occurs. The main body portion 10 is inserted into the ground of the measuring point to be fixed, and the slide bar 31 is accommodated inside the hollow tube 11, and the slide bar 31 is guided to be slidable in the hollow tube 11.
In one embodiment, the corner reflector portion includes a corner reflector 14 and a corner reflector mount 20, the corner reflector 14 being secured to the corner reflector mount 20.
In one embodiment, the sensor module 12 is connected to an external communication device via an electrical signal line 15.
In one embodiment, the sensor module 12 is a position sensor.
In one embodiment, fin assembly 32 is constructed by coupling a plurality of fins 34 around base 33, and fins 34 are formed of spring tabs, extending outwardly.
In one embodiment, the body portion 10 further includes an elastic support for supporting the slide bar 31.
In one embodiment, the resilient support is a spring 13. Spring 13 is located between the top of slide rod 31 and a stop inside hollow tube 11.
The corner reflector mount 20 is coupled to an upper portion of the body part 10 to fix the body part 10. The corner reflector 14 is fixed to an upper surface 21 of the corner reflector mount 20.
The settlement permanent scattering point device is inserted into the ground of a site to be detected in a state that the fins are contracted, is released to expand outwards and is buried. When landslide occurs, the sensor module 12 can send the detected signal to an external communication device, thereby improving the measurement accuracy of the ground-based synthetic aperture radar system as auxiliary data and reducing the occurrence of false alarm.
Claims (9)
1. A permanent scattering point device, characterized by: comprises a main body part, a movable part and a corner reflector part; the corner reflector part is fixed at the upper end of the main body part; the movable part is positioned at the lower end of the main body part; the main body part comprises a hollow tube and a sensor module; the sliding part comprises a sliding rod and a fin assembly, and the fin assembly is arranged at the lower end of the sliding rod; the slide rod is slidably inserted into a hollow tube of the main body portion, and the sensor module is disposed in the hollow tube to detect a vertical movement of the slide rod within the hollow tube.
2. A permanent scattering point device as claimed in claim 1, wherein: the corner reflector part comprises a corner reflector and a corner reflector mounting seat, and the corner reflector is fixed on the corner reflector mounting seat; the corner reflector mount is coupled to an upper portion of the body portion to fix the body portion.
3. A permanent scattering point device as claimed in claim 1, wherein: the sensor module is connected to an external communication device via an electrical signal line.
4. A permanent scattering point device as claimed in claim 3, wherein: the sensor module is a position sensor.
5. A permanent scattering point device as claimed in claim 1, wherein: the fin assembly includes a base and a plurality of fins disposed on the base.
6. A permanent scattering point device as claimed in claim 1, wherein: the fins are elastic sheets extending outwards.
7. A permanent scattering point device as claimed in claim 1, wherein: the body portion further includes a resilient support member for supporting the slide bar.
8. A permanent scattering point device as claimed in claim 7, wherein: the elastic supporting piece adopts a spring.
9. A permanent scattering point device as claimed in claim 8, wherein: the spring is located between the top of the sliding rod and a baffle inside the hollow tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111040325.9A CN113625229A (en) | 2021-09-06 | 2021-09-06 | Permanent scattering point device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111040325.9A CN113625229A (en) | 2021-09-06 | 2021-09-06 | Permanent scattering point device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113625229A true CN113625229A (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111040325.9A Pending CN113625229A (en) | 2021-09-06 | 2021-09-06 | Permanent scattering point device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204925383U (en) * | 2015-08-10 | 2015-12-30 | 中国地质大学（北京） | Supplementary novel radar corner reflector who twines that separates |
| CN106019235A (en) * | 2016-05-12 | 2016-10-12 | 河海大学 | Satellite-borne/foundation InSAR dual-purpose manual corner reflection device |
| KR20170014300A (en) * | 2015-07-29 | 2017-02-08 | (주)성진지오텍 | Apparatus for measuring sinking of underground or surface |
| KR101991503B1 (en) * | 2018-11-19 | 2019-10-01 | 주식회사 무진이엔씨 | Measurement apparatus of ground subsidence and evaluating method of ground safety |
| CN110332912A (en) * | 2019-07-09 | 2019-10-15 | 东北大学 | Multifunctional edge reflector, GB-SAR monitoring data inspection method of accuracy and error correcting method |
| CN111505634A (en) * | 2020-04-29 | 2020-08-07 | 湖南鼎方量子科技有限公司 | High-precision slope deformation monitoring system and method |
-
2021
- 2021-09-06 CN CN202111040325.9A patent/CN113625229A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170014300A (en) * | 2015-07-29 | 2017-02-08 | (주)성진지오텍 | Apparatus for measuring sinking of underground or surface |
| CN204925383U (en) * | 2015-08-10 | 2015-12-30 | 中国地质大学（北京） | Supplementary novel radar corner reflector who twines that separates |
| CN106019235A (en) * | 2016-05-12 | 2016-10-12 | 河海大学 | Satellite-borne/foundation InSAR dual-purpose manual corner reflection device |
| KR101991503B1 (en) * | 2018-11-19 | 2019-10-01 | 주식회사 무진이엔씨 | Measurement apparatus of ground subsidence and evaluating method of ground safety |
| CN110332912A (en) * | 2019-07-09 | 2019-10-15 | 东北大学 | Multifunctional edge reflector, GB-SAR monitoring data inspection method of accuracy and error correcting method |
| CN111505634A (en) * | 2020-04-29 | 2020-08-07 | 湖南鼎方量子科技有限公司 | High-precision slope deformation monitoring system and method |
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