CN105783754A - Three-dimensional-laser-scanning-based GBInSAR three-dimensional displacement field extraction method - Google Patents
Three-dimensional-laser-scanning-based GBInSAR three-dimensional displacement field extraction method Download PDFInfo
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- CN105783754A CN105783754A CN201610144799.0A CN201610144799A CN105783754A CN 105783754 A CN105783754 A CN 105783754A CN 201610144799 A CN201610144799 A CN 201610144799A CN 105783754 A CN105783754 A CN 105783754A
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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Abstract
The invention discloses a three-dimensional-laser-scanning-based GBInSAR three-dimensional displacement field extraction method. According to the method, while high-precision monitoring is carried out on a monitored area by using a GBInSAR technology, fine scanning is carried out on the monitored area by using a three-dimensional laser scanner, so that deformation information is obtained respectively; precise registration is carried out on the deformation information; with utilization of projected angles obtained by three-dimensional laser scanning and high-precision line-of-sight displacement of the GBInSAR, the deformation information is fused effectively and thus a high-precision three-dimensional displacement field is obtained. According to the invention, the method has the following beneficial effects: three-dimensional deformation information of a deformed body is obtained by three-dimensional laser and a distance of a radar line of sight is obtained by using the GBInSAR technology, so that rapid obtaining of a high-precision three-dimensional displacement field is realized. The method has advantages of fast speed, high precision, wide coverage range, high portability, easy operation, and good all-weather performance and the like and has the good theoretical significance and great practical application value in the crustal deformation monitoring technical field.
Description
Technical field
The present invention relates to a kind of GBInSAR 3-D displacement field extracting method based on 3 D laser scanning, belong to ground-based radar interferometry technical field.
Background technology
Deformation monitoring is that monitored object or object are measured, to determine its locus and external morphology feature over time.Traditional monitoring means owing to spatial resolution is low, poor continuity, the shortcoming such as big affected by environment, hinder application and the development of deformation monitoring.How quick obtaining deformable body high accuracy, high spatial resolution 3-D displacement field information become the research emphasis of deformation monitoring.
In recent years, synthetic aperture radar interferometry (SyntheticApertureRadarInterferometry, InSAR) technology is that deformation monitoring opens a new road.Along with the development of InSAR remote sensing technology is with perfect, this technology has been successfully applied to the fields such as geology, the hydrology, mapping, military affairs, environmental monitoring.
Three-dimensional laser scanning technique is an emerging surveying and mapping technology, it is possible to quickly obtains original surveying and mapping data and rebuilds the threedimensional model of scanning entity accurately.This technology acuracy is high, speed is fast, applied range, overcomes the defect of traditional method spot measurement, is one of current both at home and abroad focus that survey field is studied, is widely used to the deformation monitoring of building.
Ground synthetic aperture radar interferometry (GBInSAR, GroundBasedInSAR) is as a kind of novel to ground deformation monitoring technology, and its advantage mainly has: speed is fast, precision is high, wide coverage, operation portable, easy, round-the-clock etc..Though GBInSAR is the new spatial Geodetic surveying method of a kind of great potential, GBInSAR technology can only obtain radar line of sight to distance, it is impossible to the 3-D displacement field of extracting directly deformable body, limit the application of GBInSAR.And three-dimensional laser can obtain the 3 D deformation information of deformable body, but its observation scope is limited.If by both technological incorporation, learnt from other's strong points to offset one's weaknesses, high accuracy three-dimensional displacement field can be obtained.GBInSAR and 3 D laser scanning merge the quick obtaining that can realize high-precision three-dimensional displacement field, but at present that the research of integration technology is still not deep enough.Therefore, carry out the research to GBInSAR and 3 D laser scanning integration technology, it is proposed to a set of practicable technical scheme, there is good theory significance and actual application value.
Summary of the invention
For solving the deficiencies in the prior art, it is an object of the invention to provide one and can merge three-dimensional laser in high precision and GBInSAR deformation information obtains high accuracy three-dimensional displacement field.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that:
A kind of GBInSAR 3-D displacement field extracting method based on 3 D laser scanning, is characterized in that, comprise the steps:
1) monitored area, correct position place placing three-dimensional laser scanning and GBInSAR observation device in monitored area are selected；The position coordinates of described three-dimensional laser scanner is L (xL,yL,zL), the position coordinates of GBInSAR observation device is G (xL,yL,zL)；
2) in monitored area, place several corner reflectors, count its coordinate respectivelyN is the number of corner reflector, and the registration control points as two kinds of deformation datas of later stage uses；
3) utilize three-dimensional laser scanner and GBInSAR observation device that monitored area is monitored simultaneously, obtain the monitoring information of monitored area:
The cloud data that three-dimensional laser scanner is obtained carries out registration and obtains deflection (the Δ x, Δ y, Δ z) of monitoring point；
GBInSAR image data carries out registration, interference, solution twine etc. processes, and obtains radar high accuracy sight line to displacement los；
4) in the cloud data that GBInSAR image data and three-dimensional laser scanner obtain, extract corner reflector coordinate under respective coordinate system in monitored area, be designated as respectivelyUnified coordinate system, utilizes following formula respectively by under 3 D laser scanning coordinate and GBInSAR coordinate transformation to the frame of reference,Wherein,Represent the pixel coordinate of GBInSARTo reference coordinateTransfer function,Represent laser scanning dataTo reference coordinateTransfer function, transfer function adopts polynomial function or other function；
5) after registration, 3 D laser scanning Monitoring Data and GBInSAR Monitoring Data are registrated under the unified frame of reference, utilize calculated by coordinate below equation to try to achieve projected angle alpha, gamma:
6) the high accuracy sight line that the α, γ and the GBInSAR that obtain obtain is utilized to calculate 3-D displacement field to displacement los:
The aforesaid GBInSAR 3-D displacement field extracting method based on 3 D laser scanning, is characterized in that, described step 1) in, monitored area must be that vegetation cover is less, has certain slope, and surrounding environment change is less.
The aforesaid GBInSAR 3-D displacement field extracting method based on 3 D laser scanning, is characterized in that, described step 1) in three-dimensional laser scanner roughly the same with the monitoring range of GBInSAR observation device.
The aforesaid GBInSAR 3-D displacement field extracting method based on 3 D laser scanning, is characterized in that, described step 1) in three-dimensional laser scanner and GBInSAR observation device be positioned at same level surface, standoff distance is empirically worth setting.
The aforesaid GBInSAR 3-D displacement field extracting method based on 3 D laser scanning, is characterized in that, the corner reflector in described monitored area is evenly distributed in monitored area.
The beneficial effect that the present invention reaches: obtained the 3 D deformation information of deformable body by 3 D laser scanning, in conjunction with GBInSAR technical limit spacing radar line of sight to high-precision displacement, realize the quick obtaining of high-precision three-dimensional displacement field, have that speed is fast, precision is high, wide coverage, operation portable, easy, the advantage such as round-the-clock, ground deformation monitoring technical field is had good theory significance and actual application value.
Accompanying drawing explanation
The 3-D displacement field that Fig. 1 is the present invention extracts flow chart；
Fig. 2 is based on the GBInSAR of 3 D laser scanning and extracts 3-D displacement field schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.Following example are only for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
The present invention relates to a kind of GBInSAR 3-D displacement field extracting method based on 3 D laser scanning, comprise the following steps:
1) selecting monitored area, correct position place placing three-dimensional laser scanning and GBInSAR observation device in monitored area, as it is shown in figure 1, the position coordinates of three-dimensional laser scanner is L (xL,yL,zL), the position coordinates of GBInSAR is G (xL,yL,zL), the monitoring range making both is roughly the same.
Monitored area must be that vegetation cover is less, has certain slope, and surrounding environment change is less.Three-dimensional laser scanner is roughly the same with the monitoring range of GBInSAR observation device, and device is positioned at same level surface, and standoff distance is empirically worth setting.
2) in monitored area, place some corner reflectors, count its coordinate respectivelyN is the number of corner reflector, and the registration control points as two kinds of deformation datas of later stage uses.Preferably, the corner reflector in monitored area is evenly distributed in monitored area.
3) utilize three-dimensional laser scanner and GBInSAR observation device that monitored area is monitored simultaneously, obtain the monitoring information of monitored area, the cloud data that three-dimensional laser scanner is obtained carries out registration and obtains deflection (the Δ x of monitoring point, Δ y, Δ z), GBInSAR image data carries out registration, interference, solution twine etc. processes, and obtains radar line of sight to high precision displacement.
4) in the cloud data that GBInSAR image data and three-dimensional laser scanner obtain, extract corner reflector coordinate under respective coordinate system in monitored area, be designated as respectively
For unified coordinate system, utilize following formula respectively by under 3 D laser scanning coordinate and GBInSAR coordinate transformation to the frame of reference,Represent the pixel coordinate of GBInSARTo reference coordinateTransfer function,Represent laser scanning dataTo reference coordinateTransfer function, transfer function can adopt polynomial function or other function.
5) after registration, 3 D laser scanning Monitoring Data and GBInSAR Monitoring Data are registrated under the unified frame of reference, utilize calculated by coordinate formula to try to achieve alpha, gamma,
6) the high accuracy sight line that the α, γ and the GBInSAR that obtain obtain is utilized to calculate 3-D displacement field to displacement los:
The present invention obtains the 3 D deformation information of deformable body by three-dimensional laser, in conjunction with GBInSAR technical limit spacing radar line of sight to distance, realize the quick obtaining of high-precision three-dimensional displacement field, have that speed is fast, precision is high, wide coverage, operation portable, easy, the advantage such as round-the-clock, ground deformation monitoring technical field is had good theory significance and actual application value.
It is only the preferred embodiment of the present invention described in upper; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvement and deformation, these improve and deformation also should be regarded as protection scope of the present invention.
Claims (5)
1., based on the GBInSAR 3-D displacement field extracting method of 3 D laser scanning, it is characterized in that, comprise the steps:
1) monitored area, correct position place placing three-dimensional laser scanning and GBInSAR observation device in monitored area are selected；
The position coordinates of described three-dimensional laser scanner is L (xL,yL,zL), the position coordinates of GBInSAR observation device is G (xL,yL,zL)；
2) in monitored area, place several corner reflectors, count its coordinate respectivelyN is the number of corner reflector；
3) utilize three-dimensional laser scanner and GBInSAR observation device that monitored area is monitored simultaneously, obtain the monitoring information of monitored area:
The cloud data that three-dimensional laser scanner is obtained carries out registration and obtains deflection (the Δ x, Δ y, Δ z) of monitoring point；
GBInSAR image data carries out registration, interference, solution twine process, obtain radar high accuracy sight line to displacement los；
4) in the cloud data that GBInSAR image data and three-dimensional laser scanner obtain, extract corner reflector coordinate under respective coordinate system in monitored area, be designated as respectively
Unified coordinate system, utilizes following formula respectively by under 3 D laser scanning coordinate and GBInSAR coordinate transformation to the frame of reference,Wherein,Represent the pixel coordinate of GBInSARTo reference coordinateTransfer function,Represent laser scanning dataTo reference coordinateTransfer function, transfer function adopts polynomial function or other function；
5) after registration, 3 D laser scanning Monitoring Data and GBInSAR Monitoring Data are registrated under the unified frame of reference, utilize calculated by coordinate below equation to try to achieve projected angle alpha, gamma:
6) the high accuracy sight line that the α, γ and the GBInSAR that obtain obtain is utilized to calculate 3-D displacement field to displacement los:
2. the GBInSAR 3-D displacement field extracting method based on 3 D laser scanning according to claim 1, is characterized in that, described step 1) in, monitored area must be that vegetation cover is less, has certain slope, and surrounding environment change is less.
3. the GBInSAR 3-D displacement field extracting method based on 3 D laser scanning according to claim 1, is characterized in that, described step 1) in three-dimensional laser scanner roughly the same with the monitoring range of GBInSAR observation device.
4. the GBInSAR 3-D displacement field extracting method based on 3 D laser scanning according to claim 1, is characterized in that, described step 1) in three-dimensional laser scanner and GBInSAR observation device be positioned at same level surface, standoff distance is empirically worth setting.
5. the GBInSAR 3-D displacement field extracting method based on 3 D laser scanning according to claim 1, is characterized in that, the corner reflector in described monitored area is evenly distributed in monitored area.
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Cited By (5)
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| CN106526593A (en) * | 2016-12-19 | 2017-03-22 | 国家测绘地理信息局卫星测绘应用中心 | Sub-pixel-level corner reflector automatic positioning method based on SAR rigorous imaging model |
| CN107504914A (en) * | 2017-07-28 | 2017-12-22 | 安徽威德萨科技有限公司 | A kind of danger zone and the deformation monitoring method of alarm |
| CN111351424A (en) * | 2020-03-31 | 2020-06-30 | 内蒙古雷远信息科技有限公司 | Deformation measuring method and radar system |
| CN111736152A (en) * | 2020-08-17 | 2020-10-02 | 深圳大学 | Road slope stability monitoring method and vehicle-mounted platform device |
| CN113740844A (en) * | 2021-09-09 | 2021-12-03 | 甘肃中星鸿图科技有限公司 | Dam body three-dimensional deformation monitoring-oriented two-foundation radar combined observation method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526593A (en) * | 2016-12-19 | 2017-03-22 | 国家测绘地理信息局卫星测绘应用中心 | Sub-pixel-level corner reflector automatic positioning method based on SAR rigorous imaging model |
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| CN107504914A (en) * | 2017-07-28 | 2017-12-22 | 安徽威德萨科技有限公司 | A kind of danger zone and the deformation monitoring method of alarm |
| CN107504914B (en) * | 2017-07-28 | 2019-10-01 | 安徽威德萨科技有限公司 | A kind of deformation monitoring method of danger zone and alarm |
| CN111351424A (en) * | 2020-03-31 | 2020-06-30 | 内蒙古雷远信息科技有限公司 | Deformation measuring method and radar system |
| CN111351424B (en) * | 2020-03-31 | 2021-10-12 | 内蒙古雷远信息科技有限公司 | Deformation measuring method and radar system |
| CN111736152A (en) * | 2020-08-17 | 2020-10-02 | 深圳大学 | Road slope stability monitoring method and vehicle-mounted platform device |
| CN111736152B (en) * | 2020-08-17 | 2020-12-22 | 深圳大学 | Road slope stability monitoring method and vehicle-mounted platform device |
| CN113740844A (en) * | 2021-09-09 | 2021-12-03 | 甘肃中星鸿图科技有限公司 | Dam body three-dimensional deformation monitoring-oriented two-foundation radar combined observation method |
| CN113740844B (en) * | 2021-09-09 | 2024-04-02 | 雷添杰 | Dam three-dimensional deformation monitoring-oriented two-foundation radar combined observation method |
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