阅读说明：本技术 适用于非合作对象的毫米波三维成像方法和系统 (Millimeter wave three-dimensional imaging method and system suitable for non-cooperative object ) 是由 杨明辉 吴亮 于 2020-01-09 设计创作，主要内容包括：本发明实施例公开一种适用于非合作对象的毫米波三维成像方法和系统,其中方法包括如下步骤：基于目标非合作对象的运动电磁模型建立对应的电磁回波模型；根据所述电磁回波模型估计所述目标非合作对象的运动参数,确定所述目标非合作对象的任一散射点随时间的空间分布；根据所述空间分布生成所述目标非合作对象的三维毫米波图像。采用本发明,通过建立针对非合作目标的电磁回波模型,估计对象的运动参数确定其散射点的空间分布,可以生成非合作目标的高精度三维毫米波图像,提高最终成像的分辨率。(The embodiment of the invention discloses a millimeter wave three-dimensional imaging method and a millimeter wave three-dimensional imaging system suitable for non-cooperative objects, wherein the method comprises the following steps: establishing a corresponding electromagnetic echo model based on the moving electromagnetic model of the target non-cooperative object; estimating the motion parameters of the target non-cooperative object according to the electromagnetic echo model, and determining the spatial distribution of any scattering point of the target non-cooperative object along with time; and generating a three-dimensional millimeter wave image of the target non-cooperative object according to the spatial distribution. By adopting the invention, the electromagnetic echo model aiming at the non-cooperative target is established, the motion parameters of the object are estimated, the spatial distribution of the scattering points is determined, the high-precision three-dimensional millimeter wave image of the non-cooperative target can be generated, and the resolution of the final imaging is improved.)

1. A millimeter wave three-dimensional imaging method suitable for non-cooperative objects, the method comprising:

establishing a corresponding electromagnetic echo model based on the moving electromagnetic model of the target non-cooperative object;

estimating the motion parameters of the target non-cooperative object according to the electromagnetic echo model, and determining the spatial distribution of any scattering point of the target non-cooperative object along with time;

and generating a three-dimensional millimeter wave image of the target non-cooperative object according to the spatial distribution.

2. The method of claim 1, further comprising:

acquiring a motion data set of the target non-cooperative object;

and training a motion electromagnetic model of the target non-cooperative object aiming at a motion rule and an electromagnetic scattering rule according to the motion data set.

3. The method of claim 1, further comprising:

calculating a slope value corresponding to the slope between the target scattering point and the transmitting-receiving array element pair in the all-electronic sparse array according to the spatial distribution;

and compensating a phase parameter of the target non-cooperative object in motion echo, which is associated with the slope distance, by using the slope distance value.

4. The method of claim 3, further comprising:

and performing coherent superposition on echo data in the motion echo to generate a three-dimensional millimeter wave image of the target scattering point.

5. The method of claim 4, further comprising:

and adopting the three-dimensional millimeter wave images corresponding to all scattering points of the target non-cooperative object to form the three-dimensional millimeter wave image of the target non-cooperative object.

6. A millimeter wave three dimensional imaging system adapted for use with non-cooperative objects, the system comprising:

the echo model establishing module is used for establishing a corresponding electromagnetic echo model based on the moving electromagnetic model of the target non-cooperative object;

the parameter processing module is used for estimating the motion parameters of the target non-cooperative object according to the electromagnetic echo model and determining the spatial distribution of any scattering point of the target non-cooperative object along with time;

and the image generation module is used for generating a three-dimensional millimeter wave image of the target non-cooperative object according to the spatial distribution.

7. The system of claim 6, further comprising:

the data set acquisition module is used for acquiring a motion data set of the target non-cooperative object;

and the electromagnetic model generation module is used for training the motion electromagnetic model of the target non-cooperative object aiming at the motion rule and the electromagnetic scattering rule according to the motion data set.

8. The system of claim 6, further comprising:

the slant range value calculating module is used for calculating a slant range value corresponding to the slant range between the target scattering point and the transmitting and receiving array element pair in the all-electronic sparse array according to the spatial distribution;

and the parameter compensation module is used for adopting the slope distance value to compensate the phase parameter of the target non-cooperative object, which is associated with the slope distance in the motion echo.

9. The system of claim 8, further comprising:

and the target image generation module is used for performing coherent superposition on the echo data in the motion echo to generate a three-dimensional millimeter wave image of the target scattering point.

10. The system of claim 9, wherein:

the image generation module is further configured to perform frequency domain imaging on the corrected echo data by using a dynamic echo model, and generate a millimeter wave image of the target non-cooperative object.

Technical Field

The invention relates to the technical field of millimeter wave security inspection imaging of non-cooperative objects, in particular to a millimeter wave three-dimensional imaging method and system suitable for the non-cooperative objects.

Background

The existing millimeter wave imaging security inspection device is mature in application of security inspection imaging of a single cooperative target (a stationary inspected object matched with inspection), and can effectively prevent individuals from entering important occasions with dangerous goods. However, for a non-cooperative target (a target to be detected which cannot be used for receiving security inspection in a cooperative manner or is in a moving state), because the non-cooperative target is in the moving state, an envelope offset of echo data formed by a doppler signal is brought in an imaging process, and meanwhile, the movement of the non-cooperative target also brings an echo phase change, so that a final formed image is blurred, and the imaging resolution is reduced.

Disclosure of Invention

The embodiment of the invention provides a millimeter wave three-dimensional imaging method and system suitable for a non-cooperative object.

The embodiment of the first aspect of the invention provides a millimeter wave three-dimensional imaging method suitable for a non-cooperative object, which may include:

establishing a corresponding electromagnetic echo model based on the moving electromagnetic model of the target non-cooperative object;

estimating the motion parameters of the target non-cooperative object according to the electromagnetic echo model, and determining the spatial distribution of any scattering point of the target non-cooperative object along with time;

and generating a three-dimensional millimeter wave image of the target non-cooperative object according to the spatial distribution.

Further, the millimeter wave three-dimensional imaging method suitable for the non-cooperative object further comprises the following steps:

acquiring a motion data set of the target non-cooperative object;

and training a motion electromagnetic model of the target non-cooperative object aiming at a motion rule and an electromagnetic scattering rule according to the motion data set.

Further, the millimeter wave three-dimensional imaging method suitable for the non-cooperative object further comprises the following steps:

calculating a slope value corresponding to the slope between the target scattering point and the transmitting-receiving array element pair in the all-electronic sparse array according to the spatial distribution;

and compensating a phase parameter of the target non-cooperative object in motion echo, which is associated with the slope distance, by using the slope distance value.

Further, the millimeter wave three-dimensional imaging method suitable for the non-cooperative object further comprises the following steps:

and performing coherent superposition on echo data in the motion echo to generate a three-dimensional millimeter wave image of the target scattering point.

Further, the millimeter wave three-dimensional imaging method suitable for the non-cooperative object further comprises the following steps:

and adopting the three-dimensional millimeter wave images corresponding to all scattering points of the target non-cooperative object to form the three-dimensional millimeter wave image of the target non-cooperative object.

An embodiment of a second aspect of the present invention provides a millimeter wave three-dimensional imaging system suitable for a non-cooperative object, and the system may include:

the echo model establishing module is used for establishing a corresponding electromagnetic echo model based on the moving electromagnetic model of the target non-cooperative object;

the parameter processing module is used for estimating the motion parameters of the target non-cooperative object according to the electromagnetic echo model and determining the spatial distribution of any scattering point of the target non-cooperative object along with time;

and the image generation module is used for generating a three-dimensional millimeter wave image of the target non-cooperative object according to the spatial distribution.

Further, the millimeter wave three-dimensional imaging system suitable for the non-cooperative object further comprises:

the data set acquisition module is used for acquiring a motion data set of the target non-cooperative object;

and the electromagnetic model generation module is used for training the motion electromagnetic model of the target non-cooperative object aiming at the motion rule and the electromagnetic scattering rule according to the motion data set.

Further, the millimeter wave three-dimensional imaging system suitable for the non-cooperative object further comprises:

the slant range value calculating module is used for calculating a slant range value corresponding to the slant range between the target scattering point and the transmitting and receiving array element pair in the all-electronic sparse array according to the spatial distribution;

and the parameter compensation module is used for adopting the slope distance value to compensate the phase parameter of the target non-cooperative object, which is associated with the slope distance in the motion echo.

Further, the millimeter wave three-dimensional imaging system suitable for the non-cooperative object further comprises:

and the target image generation module is used for performing coherent superposition on the echo data in the motion echo to generate a three-dimensional millimeter wave image of the target scattering point.

Further, the millimeter wave three-dimensional imaging system suitable for the non-cooperative object further comprises:

the image generation module is further configured to perform frequency domain imaging on the corrected echo data by using a dynamic echo model, and generate a millimeter wave image of the target non-cooperative object.

In the embodiment of the invention, the electromagnetic echo model for the non-cooperative target is established, the motion parameters of the object are estimated, the spatial distribution of scattering points of the object is determined, the high-precision three-dimensional millimeter wave image of the non-cooperative target is generated, and the resolution of final imaging is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for persons of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic flow chart of a millimeter wave three-dimensional imaging method suitable for a non-cooperative object according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a millimeter wave three-dimensional imaging system suitable for a non-cooperative object according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the embodiment of the invention, the millimeter wave three-dimensional imaging system suitable for the non-cooperative object can be simply referred to as an imaging system.

The millimeter wave three-dimensional imaging method suitable for non-cooperative objects provided by the embodiment of the invention will be described in detail below with reference to fig. 1.

Referring to fig. 1, a schematic flow chart of a millimeter wave three-dimensional imaging method suitable for a non-cooperative object is provided in the embodiment of the present invention. As shown in fig. 1, the method of an embodiment of the present invention may include the following steps S101 to S103.

S101, establishing a corresponding electromagnetic echo model based on the moving electromagnetic model of the target non-cooperative object.

In an alternative embodiment, the imaging system may obtain a motion data set of the target non-cooperative object, and further, may train a motion electromagnetic model of the target non-cooperative object with respect to a motion law and an electromagnetic scattering law according to the motion data set.

In particular, the imaging system may establish a corresponding electromagnetic echo model based on a moving electromagnetic model of the target non-cooperative object.

S102, estimating motion parameters of the target non-cooperative object according to the electromagnetic echo model, and determining the spatial distribution of any scattering point of the target non-cooperative object along with time.

Specifically, the imaging system may estimate a motion parameter of the target non-cooperative object according to the electromagnetic echo model, and determine spatial distribution of any scattering point of the target non-cooperative object over time.

In an alternative embodiment, the imaging system may calculate a slope value corresponding to a slope between the target scattering point and the transceiver array element pair in the all-electronic sparse array according to the spatial distribution, and it is understood that the all-electronic sparse array may include a sparse array with at least three levels of sub-arrays, that is, each array unit in the sparse array is not a single unit but an array unit composed of at least several sub-units.

Further, the imaging system may use the slope distance value to compensate for a phase parameter of the target non-cooperative object associated with the slope distance in the motion echo.

S103, generating a three-dimensional millimeter wave image of the target non-cooperative object according to the spatial distribution.

In an optional embodiment, the imaging system may perform coherent superposition on the echo data in the motion echo to generate a three-dimensional millimeter wave image of the scattering point of the target.

Further, the imaging system may form the three-dimensional millimeter wave image of the target non-cooperative object by using the three-dimensional millimeter wave images corresponding to all scattering points of the target non-cooperative object.

In the embodiment of the invention, the electromagnetic echo model for the non-cooperative target is established, the motion parameters of the object are estimated, the spatial distribution of scattering points of the object is determined, the high-precision three-dimensional millimeter wave image of the non-cooperative target is generated, and the resolution of final imaging is improved.

The millimeter wave three-dimensional imaging system suitable for non-cooperative objects provided by the embodiment of the invention will be described in detail with reference to fig. 2. It should be noted that the imaging system shown in fig. 2 is used for executing the method of the embodiment of the present invention shown in fig. 1, and for convenience of description, only the portion related to the embodiment of the present invention is shown, and details of the technology are not disclosed, please refer to the embodiment of the present invention shown in fig. 1.

As shown in fig. 2, the imaging system 10 of the embodiment of the present invention may include: the system comprises an echo model establishing module 101, a parameter processing module 102, an image generating module 103, a data set acquiring module 104, an electromagnetic model generating module 105, a slant distance value calculating module 106, a parameter compensating module 107 and a target image generating module 108.

An echo model establishing module 101, configured to establish a corresponding electromagnetic echo model based on a moving electromagnetic model of a target non-cooperative object.

In an alternative embodiment, the data set obtaining module 104 may obtain a motion data set of the target non-cooperative object, and further, the electromagnetic model generating module 105 may train a motion electromagnetic model of the target non-cooperative object for a motion law and an electromagnetic scattering law according to the motion data set.

In a specific implementation, the echo model establishing module 101 may establish a corresponding electromagnetic echo model based on a moving electromagnetic model of a target non-cooperative object.

And the parameter processing module 102 is configured to estimate a motion parameter of the target non-cooperative object according to the electromagnetic echo model, and determine spatial distribution of any scattering point of the target non-cooperative object over time.

In a specific implementation, the parameter processing module 102 may estimate a motion parameter of the target non-cooperative object according to the electromagnetic echo model, and determine a spatial distribution of any scattering point of the target non-cooperative object over time.

In an alternative embodiment, the slope value calculating module 106 may calculate the slope value corresponding to the slope between the target scattering point and the transceiver array element pair in the all-electronic sparse array according to the spatial distribution, and it is understood that the all-electronic sparse array may include a sparse array with at least three levels of sub-arrays, that is, each array element in the sparse array is not a single element but an array element composed of at least several sub-elements.

Further, the parameter compensation module 107 may compensate the phase parameter of the target non-cooperative object associated with the slope distance in the motion echo by using the slope distance value.

And the image generation module 103 is used for generating a three-dimensional millimeter wave image of the target non-cooperative object according to the spatial distribution.

In an optional embodiment, the target image generation module 108 may perform coherent superposition on the echo data in the motion echo to generate a three-dimensional millimeter wave image of the target scattering point.

Further, the image generation module 103 may adopt the three-dimensional millimeter wave images corresponding to all scattering points of the target non-cooperative object to form a three-dimensional millimeter wave image of the target non-cooperative object.

In the embodiment of the invention, the electromagnetic echo model for the non-cooperative target is established, the motion parameters of the object are estimated, the spatial distribution of scattering points of the object is determined, the high-precision three-dimensional millimeter wave image of the non-cooperative target is generated, and the resolution of final imaging is improved.

It is understood that the execution of the above method steps is only a preferred execution sequence, and the execution sequence can be adjusted according to actual requirements in the implementation process.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can include the processes of the embodiments of the methods described above when the computer program is executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.