CN116660894B - SAR three-dimensional imaging method, device and server based on dynamic super-surface antenna - Google Patents
SAR three-dimensional imaging method, device and server based on dynamic super-surface antenna Download PDFInfo
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Abstract
The invention provides a SAR three-dimensional imaging method, a device and a server based on a dynamic super-surface antenna, which relate to the technical field of SAR imaging and comprise the following steps: acquiring task demand information, determining orbital angular momentum bit information and polarization bit information of the dynamic super-surface antenna based on basic demand information and target characteristic demand information through a pre-established data analysis model, and transmitting the orbital angular momentum bit information and the polarization bit information to the dynamic super-surface antenna; and receiving an antenna pattern set fed back by the dynamic super-surface antenna, and determining a three-dimensional image of the object to be measured based on the antenna pattern set through a preset SAR three-dimensional imaging model, wherein the antenna pattern set is an antenna pattern of different observation angles acquired by the dynamic super-surface antenna in one flight. The invention can acquire antenna patterns with different observation angles in one flight, thereby remarkably reducing the data acquisition difficulty of three-dimensional imaging and improving the three-dimensional imaging efficiency.
Description
Technical Field
The invention relates to the technical field of SAR imaging, in particular to a SAR three-dimensional imaging method, device and server based on a dynamic super-surface antenna.
Background
The SAR imaging technology can be applied to the fields of three-dimensional reconstruction of large-scale cities, deformation monitoring, historic building cultural heritage protection and the like. At present, related technologies propose that a three-dimensional SAR imaging method mainly comprises a three-dimensional tomography method for space-borne SAR random space sampling and an airborne array interference SAR three-dimensional imaging method, but in the scheme, because an SAR satellite cannot change the irradiation angle of electromagnetic waves in flight, remote sensing images in different modes (irradiation angles) are required to be acquired through multiple flights, so that the difficulty and the time consumption for acquiring data of an object to be detected are high in the three-dimensional imaging process.
Disclosure of Invention
In view of the above, the invention aims to provide a SAR three-dimensional imaging method, device and server based on a dynamic super-surface antenna, which can obtain antenna patterns with different observation angles in one flight, thereby remarkably reducing the data acquisition difficulty of three-dimensional imaging and improving the three-dimensional imaging efficiency.
In a first aspect, an embodiment of the present invention provides a SAR three-dimensional imaging method based on a dynamic super-surface antenna, where the method is applied to a server, and the server is communicatively connected with the dynamic super-surface antenna, and the method includes: acquiring task demand information, wherein the task demand information comprises: basic demand information and target characteristic demand information; determining orbital angular momentum bit information and polarization bit information of the dynamic super-surface antenna based on basic requirement information and target characteristic requirement information through a pre-established data analysis model, and transmitting the orbital angular momentum bit information and the polarization bit information to the dynamic super-surface antenna; and receiving an antenna pattern set fed back by the dynamic super-surface antenna, and determining a three-dimensional image of the object to be measured based on the antenna pattern set through a preset SAR three-dimensional imaging model, wherein the antenna pattern set is an antenna pattern of different observation angles acquired by the dynamic super-surface antenna in one flight.
In one embodiment, the step of determining orbital angular momentum bit information and polarization bit information of the dynamic subsurface antenna based on the base requirement information and the target characteristic requirement information by means of a pre-established data analysis model comprises: transmitting the basic demand information to a data analysis model, and determining orbital angular momentum bit information; and sending the target characteristic requirement information to a data analysis model, and determining polarization bit information.
In one embodiment, the step of transmitting the base demand information to a data analysis model to determine orbital angular momentum bit information comprises: acquiring resolution requirements and angle requirements in the basic requirement information; determining the irradiation mode of the dynamic super-surface antenna according to the angle requirement, and determining the number of the irradiation modes of the dynamic super-surface antenna according to the resolution requirement; and determining orbital angular momentum bit information according to the irradiation mode and the irradiation mode number, wherein the orbital angular momentum bit information is used for controlling the angle of the dynamic super-surface antenna irradiating the object to be measured and the times of changing the observation angle.
In one embodiment, the resolution requirement is positively correlated with the number of illumination modes.
In one embodiment, the step of transmitting the target property requirement information to the data analysis model and determining the polarization bit information comprises: acquiring physical characteristic information to be detected of an object to be detected in the target characteristic requirement information; and determining polarization bit information according to the physical characteristic information to be detected, wherein the polarization bit information is used for controlling the dynamic super-surface antenna to acquire the target physical characteristic of the object to be detected.
In one embodiment, the step of transmitting orbital angular momentum bit information and polarization bit information to the dynamic subsurface antenna comprises: determining action coding information based on orbital angular momentum bit information and polarization bit information through a pre-established information coding model; and sending the action coding information to the dynamic subsurface antenna, so that the dynamic subsurface antenna executes the operation corresponding to the action coding information.
In one embodiment, the step of determining a three-dimensional image of the object to be measured based on the antenna pattern set by presetting the SAR three-dimensional imaging model includes: receiving an antenna pattern set fed back by a dynamic super-surface antenna; and determining a synthetic aperture by utilizing the antenna direction diagram set, and determining a three-dimensional image of the object to be detected based on the synthetic aperture by presetting an SAR three-dimensional imaging model.
In a second aspect, an embodiment of the present invention further provides a SAR three-dimensional imaging device based on a dynamic subsurface antenna, where the device is applied to a server, and the server is communicatively connected to the dynamic subsurface antenna, and the device includes: the information acquisition module acquires task demand information, wherein the task demand information comprises: basic demand information and target characteristic demand information; the information analysis module is used for determining orbital angular momentum bit information and polarization bit information of the dynamic super-surface antenna based on the basic requirement information and the target characteristic requirement information through a pre-established data analysis model and transmitting the orbital angular momentum bit information and the polarization bit information to the dynamic super-surface antenna; the image generation module is used for receiving an antenna pattern set fed back by the dynamic super-surface antenna, determining a three-dimensional image of an object to be tested based on the antenna pattern set through a preset SAR three-dimensional imaging model, wherein the antenna pattern set is an antenna pattern of different observation angles acquired by the dynamic super-surface antenna in one-time flight.
In a third aspect, embodiments of the present invention also provide a server comprising a processor and a memory, the memory storing computer executable instructions executable by the processor, the processor executing the computer executable instructions to implement the method of any one of the first aspects.
In a fourth aspect, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions that, when invoked and executed by a processor, cause the processor to implement the method of any one of the first aspects.
The embodiment of the invention has the following beneficial effects:
after task demand information is acquired, orbital angular momentum bit information and polarization bit information of the dynamic super-surface antenna are determined based on basic demand information and target characteristic demand information through a pre-established data analysis model, and the orbital angular momentum bit information and the polarization bit information are sent to the dynamic super-surface antenna; the method comprises the steps of receiving an antenna pattern set fed back by a dynamic super-surface antenna, determining a three-dimensional image of an object to be detected based on the antenna pattern set through a preset SAR three-dimensional imaging model, wherein the antenna pattern set is an antenna pattern of different observation angles obtained by the dynamic super-surface antenna in one flight, and the antenna pattern of different observation angles obtained by the dynamic super-surface antenna in one flight can obviously reduce the data obtaining difficulty of three-dimensional imaging and improve the three-dimensional imaging efficiency.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a SAR three-dimensional imaging method based on a dynamic super-surface antenna according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a SAR three-dimensional imaging method based on a dynamic subsurface antenna according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a SAR three-dimensional imaging device based on a dynamic super-surface antenna according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, the SAR imaging technology can greatly reduce the cost in the fields of three-dimensional reconstruction, deformation monitoring, historic building cultural heritage protection and the like of a large-scale city, can provide more comprehensive information guarantee decisions in the aspects of safety risk investigation, evaluation and the like, has all-weather working capacity in all days, and has unique advantages for deformation information monitoring of the whole life cycle of a major infrastructure of the city; the SAR three-dimensional imaging mainly comprises a space-borne SAR random space sampling tomographic three-dimensional imaging method and an airborne array interference SAR three-dimensional imaging, and the two imaging models are used for acquiring target echoes by adopting a synthetic aperture radar for emitting plane electromagnetic waves, wherein the space-borne SAR random space sampling tomographic three-dimensional imaging has no special requirements on an SAR system, but has strict requirements on SAR orbit or flight path control in order to ensure the coherence of data, so that the problems of long data acquisition time, high difficulty, serious signal decorrelation and the like exist; the airborne array interference SAR solves the time decorrelation problem, but a longer mechanical arm is needed to suspend an array antenna, the mechanical arm is too long in the flying process and is greatly influenced by vibration, and the airborne array interference SAR brings great burden to an imaging system and is complex in system and difficult to popularize and apply. The two schemes adopt a synthetic aperture radar for emitting planar electromagnetic waves to acquire target echoes, and different irradiation angles are formed between the target and the target in the vertical direction of the inclined distance through random spatial sampling or an interference array, so that a synthetic aperture is formed, and therefore, the irradiation angle of the electromagnetic waves cannot be changed and the polarization ratio cannot be changed during flight; based on the method, the SAR three-dimensional imaging method based on the dynamic super-surface antenna can be implemented to acquire antenna patterns with different observation angles in one flight, so that the data acquisition difficulty of three-dimensional imaging is remarkably reduced, and the three-dimensional imaging efficiency is improved.
The embodiment of the invention introduces a SAR three-dimensional imaging method based on a dynamic super-surface antenna in detail, referring to a flow diagram of the SAR three-dimensional imaging method based on the dynamic super-surface antenna shown in fig. 1, the method is applied to a server, the server is in communication connection with the dynamic super-surface antenna, wherein the super-surface is a novel material radar antenna formed by an artificial electromagnetic material, has electromagnetic flexibility, the measuring mode of the super-surface is changed along with frequency, and can be designed into a dynamically changed antenna with a complex measuring mode, namely the dynamic super-surface antenna, and the dynamic super-surface antenna can transmit electromagnetic waves carrying information such as amplitude, phase, polarization parameters, orbital angular momentum and the like through information coding to acquire and sense the information of an object to be detected, and the method mainly comprises the following steps S102 to S106:
step S102, task demand information is acquired, wherein the task demand information comprises: basic requirement information and target characteristic requirement information, in one embodiment, the basic requirement information is used for determining target resolution of three-dimensional imaging of an object to be detected and forming an observation angle required by a synthetic aperture, and the target characteristic requirement information is used for determining physical characteristics of the object to be detected which need to be perceived.
Step S104, determining orbital angular momentum position information and polarization position information of the dynamic super-surface antenna based on the basic requirement information and the target characteristic requirement information through a pre-established data analysis model, and sending the orbital angular momentum position information and the polarization position information to the dynamic super-surface antenna, wherein in one implementation mode, the dynamic super-surface antenna can control the polarization characteristics of electromagnetic waves and the observation angles of antenna beams by regulating and controlling the polarization positions and the orbital angular momentum positions of the antenna, and when receiving the task requirement information, a server determines the angular momentum position (the observation angles of the antenna beams) of the dynamic super-surface antenna according to the basic requirement information, determines the polarization position information (polarization characteristics) of the dynamic super-surface antenna according to the target characteristic requirement information, and can enable the dynamic super-surface antenna to sense the physical characteristics such as the surface roughness, the symmetry, the orientation and the like of an object to be detected through regulating and controlling the polarization position information.
Step S106, receiving an antenna pattern set fed back by the dynamic super-surface antenna, and determining a three-dimensional image of the object to be measured based on the antenna pattern set through a preset SAR three-dimensional imaging model, where the antenna pattern set is an antenna pattern of different observation angles acquired by the dynamic super-surface antenna in one flight, and in one embodiment, the antenna pattern set may include remote sensing images of the object to be measured at different angles and different physical characteristics.
In one embodiment, after receiving the antenna pattern set fed back by the dynamic super-surface antenna, determining a synthetic aperture by using the antenna pattern set, and determining a three-dimensional image of the object to be measured based on the synthetic aperture by presetting the SAR three-dimensional imaging model. In practical application, referring to the schematic diagram of a SAR three-dimensional imaging method based on a dynamic super-surface antenna shown in fig. 2, the synthetic aperture can be formed by changing the observation angle of the antenna beam of the dynamic super-surface antenna through changing the mode of the antenna pattern, so that the synthetic aperture capability of the dynamic super-surface antenna is applied to the oblique vertical direction in SAR three-dimensional imaging, and the synthetic aperture is still realized by relative motion in the azimuth direction, so that SAR three-dimensional imaging can be realized by one flight.
According to the SAR three-dimensional imaging method based on the dynamic super-surface antenna, antenna patterns with different observation angles can be acquired in one flight, so that the data acquisition difficulty of three-dimensional imaging is remarkably reduced, and the three-dimensional imaging efficiency is improved.
The embodiment of the invention also provides an implementation mode for determining the orbital angular momentum bit information and the polarization bit information of the dynamic super-surface antenna, which is specifically described in the following (1) to (3):
(1) The basic requirement information is sent to a data analysis model to determine orbital angular momentum position information, wherein the orbital angular momentum position information is used for controlling the angle of the dynamic super-surface antenna irradiating an object to be measured and the times of changing the observation angle, in one implementation mode, after the resolution requirement and the angle requirement in the basic requirement information are obtained, the irradiation mode of the dynamic super-surface antenna is determined according to the angle requirement, the irradiation mode number of the dynamic super-surface antenna is determined according to the resolution requirement, the orbital angular momentum position information is determined according to the irradiation mode number and the irradiation mode number, and therefore the orbital angular momentum position of the dynamic super-surface antenna is adjusted, the observation angle of the object to be measured is different under different irradiation modes, and the resolution requirement is positively correlated with the irradiation mode number.
(2) Transmitting the target characteristic requirement information to a data analysis model, and determining polarization bit information, wherein the polarization bit information is used for controlling the dynamic super-surface antenna to acquire the target physical characteristic of the object to be detected, and in one implementation mode, acquiring the information of the physical characteristic to be detected of the object to be detected in the target characteristic requirement information; and determining polarization bit information according to the physical characteristic information to be measured.
(3) Determining action coding information based on orbital angular momentum bit information and polarization bit information through a pre-established information coding model; and sending the action coding information to the dynamic subsurface antenna, so that the dynamic subsurface antenna executes the operation corresponding to the action coding information.
In practical application, after the dynamic super-surface antenna receives the action coding information, the coding information is brought into a preset antenna pattern model, and the information processing logic of the preset antenna pattern model is as follows:
since the dynamic super-surface antenna is an area array antenna formed by information metamaterial array elements, each array element is essentially a resonance circuit, and the amplitude and the phase of the array element can be changed by adjusting the capacitance of the resonance circuit, and the amplitude and the phase of the array element are represented by the polarization rate alpha (f). At the reference waveThe relation between the polarization rate alpha (f) of the super-surface array element and the reference wave can be expressed as
Where β is the propagation constant of the waveguide, H 0 Indicating the field strength and x the position of the array element in the array. Each super-surface array element is used as a dipole to radiate electromagnetic field outwards, and for the ith array element of the one-dimensional dynamic super-surface, the field is far-fieldThe field strength at this point can be expressed as:
wherein k=2pi f/c is wave number,a unit vector representing the θ direction. For a one-dimensional dynamic subsurface θ=0, cos θ=1. For simplicity later, θ=0 was used for analysis.
By superimposing the far field radiation from all the array elements, the far field radiation pattern of the super surface antenna can be obtained:
wherein,representing a unit vector in the x-direction. In the denominator of the green function, +.>So the above is rewritten as
Assuming that the observation point is far-field with respect to the aperture, the above equation can be approximated as
In the above, the fraunhofer approximation is adoptedThe radial dependence and the angular dependence of the far field are separated. Radial dependence becomes a simple phase factor, and the angular distribution of the field is determined by the super-surface Array Factor (AF):
the principle of forming the antenna direction pattern of the super-surface antenna is as above. Essentially, the above equation is the same array factor as used by conventional array antennas, except that the super surface antenna array spacing is on the order of sub-wavelengths. If the array elements of the super-surface antenna satisfy:
the antenna pattern is:
the antenna pattern is directed to phi 0 Direction, therefore, change the polarization rate alpha of array elements i (f) The orientation of the antenna pattern may be changed. When the super-surface antenna is at the operating frequency f, its polarization can be expressed as a function alpha related to the antenna pattern directivity i (phi) there are M kinds of changing modes of polarization, and the antenna pattern of the M-th mode can be expressed as:
it can be seen that by changing the mode of the super surface array unit, the mode of the antenna pattern can be changed, and further, the change of the target observation angle is realized, so that the synthetic aperture is formed.
In summary, the invention can acquire antenna patterns with different observation angles in one flight, can form an equivalent array antenna without the need of an airborne array to interfere with the suspension of a mechanical arm in SAR three-dimensional imaging, and can acquire the physical characteristics of surface roughness, symmetry, orientation and the like of an object to be detected through the regulation and control of polarization positions, thereby obviously reducing the data acquisition difficulty of three-dimensional imaging, improving the accuracy of information of the object to be detected and improving the three-dimensional imaging efficiency.
For the SAR three-dimensional imaging method based on the dynamic super-surface antenna provided in the foregoing embodiment, the embodiment of the present invention provides a SAR three-dimensional imaging device based on the dynamic super-surface antenna, which is applied to a server, and the server is communicatively connected with the dynamic super-surface antenna, see a schematic structural diagram of the SAR three-dimensional imaging device based on the dynamic super-surface antenna shown in fig. 3, and the device includes the following parts:
the information obtaining module 302 obtains task demand information, where the task demand information includes: basic demand information and target characteristic demand information;
the information analysis module 304 determines orbital angular momentum bit information and polarization bit information of the dynamic super-surface antenna based on the basic requirement information and the target characteristic requirement information through a pre-established data analysis model, and sends the orbital angular momentum bit information and the polarization bit information to the dynamic super-surface antenna;
the image generating module 306 receives an antenna pattern set fed back by the dynamic super-surface antenna, and determines a three-dimensional image of the object to be measured based on the antenna pattern set through a preset SAR three-dimensional imaging model, wherein the antenna pattern set is an antenna pattern of different observation angles acquired by the dynamic super-surface antenna in one flight.
According to the data processing device, antenna patterns with different observation angles can be acquired in one-time flight, so that the data acquisition difficulty of three-dimensional imaging is remarkably reduced, and the three-dimensional imaging efficiency is improved.
In one embodiment, when performing the step of determining the orbital angular momentum bit information and the polarization bit information of the dynamic subsurface antenna based on the basic requirement information and the target characteristic requirement information by using the pre-established data analysis model, the information analysis module 304 is further configured to: transmitting the basic demand information to a data analysis model, and determining orbital angular momentum bit information; and sending the target characteristic requirement information to a data analysis model, and determining polarization bit information.
In one embodiment, when the step of sending the basic requirement information to the data analysis model and determining the orbital angular momentum bit information is performed, the information analysis module 304 is further configured to: acquiring resolution requirements and angle requirements in the basic requirement information; determining the irradiation mode of the dynamic super-surface antenna according to the angle requirement, and determining the number of the irradiation modes of the dynamic super-surface antenna according to the resolution requirement; and determining orbital angular momentum bit information according to the irradiation mode and the irradiation mode number, wherein the orbital angular momentum bit information is used for controlling the angle of the dynamic super-surface antenna irradiating the object to be measured and the times of changing the observation angle.
In one embodiment, the information analysis module 304 is further configured to: the resolution requirement is determined to be positively correlated with the number of illumination modes.
In one embodiment, when the step of sending the target characteristic requirement information to the data analysis model and determining the polarization bit information is performed, the information analysis module 304 is further configured to: acquiring physical characteristic information to be detected of an object to be detected in the target characteristic requirement information; and determining polarization bit information according to the physical characteristic information to be detected, wherein the polarization bit information is used for controlling the dynamic super-surface antenna to acquire the target physical characteristic of the object to be detected.
In one embodiment, in performing the step of transmitting the orbital angular momentum bit information and the polarization bit information to the dynamic subsurface antenna, the information analysis module 304 is further configured to: determining action coding information based on orbital angular momentum bit information and polarization bit information through a pre-established information coding model; and sending the action coding information to the dynamic subsurface antenna, so that the dynamic subsurface antenna executes the operation corresponding to the action coding information.
In one embodiment, when performing the step of determining the three-dimensional image of the object to be measured based on the antenna pattern set by presetting the SAR three-dimensional imaging model, the image generating module 306 is further configured to: receiving an antenna pattern set fed back by a dynamic super-surface antenna; and determining a synthetic aperture by utilizing the antenna direction diagram set, and determining a three-dimensional image of the object to be detected based on the synthetic aperture by presetting an SAR three-dimensional imaging model.
The device provided by the embodiment of the present invention has the same implementation principle and technical effects as those of the foregoing method embodiment, and for the sake of brevity, reference may be made to the corresponding content in the foregoing method embodiment where the device embodiment is not mentioned.
The embodiment of the invention provides electronic equipment, which comprises a processor and a storage device; the storage means has stored thereon a computer program which, when executed by the processor, performs the method of any of the embodiments described above.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, where the electronic device 100 includes: a processor 40, a memory 41, a bus 42 and a communication interface 43, the processor 40, the communication interface 43 and the memory 41 being connected by the bus 42; the processor 40 is arranged to execute executable modules, such as computer programs, stored in the memory 41.
The memory 41 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and the at least one other network element is achieved via at least one communication interface 43 (which may be wired or wireless), which may use the internet, a wide area network, a local network, a metropolitan area network, etc.
Bus 42 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 4, but not only one bus or type of bus.
The memory 41 is configured to store a program, and the processor 40 executes the program after receiving an execution instruction, and the method executed by the apparatus for flow defining disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 40 or implemented by the processor 40.
The processor 40 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in processor 40. The processor 40 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal processor (Digital Signal Processing, DSP for short), application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA for short), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 41 and the processor 40 reads the information in the memory 41 and in combination with its hardware performs the steps of the method described above.
The computer program product of the readable storage medium provided by the embodiment of the present invention includes a computer readable storage medium storing a program code, where the program code includes instructions for executing the method described in the foregoing method embodiment, and the specific implementation may refer to the foregoing method embodiment and will not be described herein.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A SAR three-dimensional imaging method based on a dynamic subsurface antenna, wherein the method is applied to a server, and the server is communicatively connected with the dynamic subsurface antenna, the method comprising:
acquiring task demand information, wherein the task demand information comprises: basic requirement information and target characteristic requirement information, the basic requirement information comprising: a resolution requirement for determining an illumination mode of the dynamic subsurface antenna, and an angle requirement for determining an illumination mode number of the dynamic subsurface antenna to determine orbital angular momentum bit information according to the illumination mode and the illumination mode number, the target characteristic requirement information comprising: the method comprises the steps of determining the polarization bit information of a dynamic super-surface antenna according to the physical characteristics to be detected of an object to be detected, wherein the physical characteristics to be detected are used for determining the polarization bit information of the dynamic super-surface antenna so that the polarization bit information controls the dynamic super-surface antenna to acquire the target physical characteristics of the object to be detected;
determining the orbital angular momentum bit information and the polarization bit information of the dynamic subsurface antenna based on the basic requirement information and the target characteristic requirement information through a pre-established data analysis model, and transmitting the orbital angular momentum bit information and the polarization bit information to the dynamic subsurface antenna;
and receiving an antenna pattern set fed back by the dynamic super-surface antenna, and determining a three-dimensional image of the object to be measured based on the antenna pattern set through a preset SAR three-dimensional imaging model, wherein the antenna pattern set is an antenna pattern of different observation angles acquired by the dynamic super-surface antenna in one flight.
2. The SAR three-dimensional imaging method based on a dynamic subsurface antenna according to claim 1, wherein the step of determining the orbital angular momentum bit information and the polarization bit information of the dynamic subsurface antenna based on the basic requirement information and the target characteristic requirement information by a pre-established data analysis model, comprises:
transmitting the basic demand information to the data analysis model, and determining the orbital angular momentum bit information;
and sending the target characteristic requirement information to the data analysis model, and determining the polarization bit information.
3. The SAR three-dimensional imaging method based on a dynamic subsurface antenna according to claim 2, wherein said step of transmitting said base demand information to said data analysis model, determining said orbital angular momentum bit information, comprises:
acquiring resolution requirements and angle requirements in the basic requirement information;
determining the irradiation mode of the dynamic super-surface antenna according to the angle requirement, and determining the number of the irradiation modes of the dynamic super-surface antenna according to the resolution requirement;
and determining the orbital angular momentum bit information according to the irradiation mode and the irradiation mode number, wherein the orbital angular momentum bit information is used for controlling the angle of the dynamic super-surface antenna irradiating the object to be measured and the times of changing the observation angle.
4. A method of SAR three-dimensional imaging based on a dynamic subsurface antenna according to claim 3, wherein the resolution requirement is positively correlated with the number of illumination modes.
5. The SAR three-dimensional imaging method based on a dynamic subsurface antenna according to claim 2, wherein said step of transmitting said target property requirement information to said data analysis model, determining said polarization bit information, comprises:
acquiring the physical characteristic information to be detected of the object to be detected in the target characteristic requirement information;
and determining the polarization bit information according to the physical characteristic information to be detected, wherein the polarization bit information is used for controlling the dynamic super-surface antenna to acquire the target physical characteristic of the object to be detected.
6. The SAR three-dimensional imaging method based on a dynamic subsurface antenna according to claim 1, wherein said step of transmitting said orbital angular momentum bit information and said polarization bit information to said dynamic subsurface antenna comprises:
determining action coding information based on the orbital angular momentum bit information and the polarization bit information through a pre-established information coding model;
and sending the action coding information to the dynamic subsurface antenna, so that the dynamic subsurface antenna executes the operation corresponding to the action coding information.
7. The SAR three-dimensional imaging method based on a dynamic subsurface antenna according to claim 1, wherein said step of determining a three-dimensional image of an object to be measured based on said antenna pattern set by presetting a SAR three-dimensional imaging model comprises:
receiving the antenna pattern set fed back by the dynamic subsurface antenna;
and determining a synthetic aperture by using the antenna direction diagram set, and determining a three-dimensional image of the object to be detected based on the synthetic aperture by presetting an SAR three-dimensional imaging model.
8. A SAR three-dimensional imaging device based on a dynamic subsurface antenna, wherein the device is applied to a server, which is communicatively connected with the dynamic subsurface antenna, the device comprising:
the information acquisition module acquires task demand information, wherein the task demand information comprises: basic requirement information and target characteristic requirement information, the basic requirement information comprising: a resolution requirement for determining an illumination mode of the dynamic subsurface antenna, and an angle requirement for determining an illumination mode number of the dynamic subsurface antenna to determine orbital angular momentum bit information according to the illumination mode and the illumination mode number, the target characteristic requirement information comprising: the method comprises the steps of determining the polarization bit information of a dynamic super-surface antenna according to the physical characteristics to be detected of an object to be detected, wherein the physical characteristics to be detected are used for determining the polarization bit information of the dynamic super-surface antenna so that the polarization bit information controls the dynamic super-surface antenna to acquire the target physical characteristics of the object to be detected;
the information analysis module is used for determining the orbital angular momentum bit information and the polarization bit information of the dynamic super-surface antenna based on the basic requirement information and the target characteristic requirement information through a pre-established data analysis model and sending the orbital angular momentum bit information and the polarization bit information to the dynamic super-surface antenna;
the image generation module is used for receiving an antenna pattern set fed back by the dynamic super-surface antenna, determining a three-dimensional image of the object to be detected based on the antenna pattern set through a preset SAR three-dimensional imaging model, wherein the antenna pattern set is an antenna pattern of different observation angles acquired by the dynamic super-surface antenna in one flight.
9. A server comprising a processor and a memory, the memory storing computer executable instructions executable by the processor, the processor executing the computer executable instructions to implement the method of any one of claims 1 to 7.
10. A computer readable storage medium storing computer executable instructions which, when invoked and executed by a processor, cause the processor to implement the method of any one of claims 1 to 7.
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