阅读说明：本技术 多机集群磁目标定位方法及使用其的空中集群异构平台 (Multi-machine cluster magnetic target positioning method and aerial cluster heterogeneous platform using same ) 是由 秦杰 王春娥 万双爱 王同雷 陈路昭 江薇 于 2020-11-18 设计创作，主要内容包括：本发明提供了一种多机集群磁目标定位方法及使用其的空中集群异构平台,该方法包括：构建空中集群异构平台,空中集群异构平台包括至少三个无人机,任一无人机均搭载磁强计作为磁场测量单元；空中集群异构平台中的各个无人机均以磁探测幅宽为间距,各个无人机平行飞行以对目标进行探测；当空中集群异构平台中的任一无人机搜索到磁目标信号后,各个无人机改变航线并按照改变后的航线继续飞行探测以获取信号数据；根据各个无人机的信号数据以及各个无人机之间的相对位置建立磁定位求解模型,基于磁定位求解模型对目标进行优化以对磁异常目标进行定位。应用本发明的技术方案,以解决现有技术中磁目标识别方法存在定位效率低、定位精度差的技术问题。(The invention provides a multi-machine cluster magnetic target positioning method and an aerial cluster heterogeneous platform using the same, wherein the method comprises the following steps: constructing an aerial cluster heterogeneous platform, wherein the aerial cluster heterogeneous platform comprises at least three unmanned aerial vehicles, and each unmanned aerial vehicle carries a magnetometer as a magnetic field measurement unit; each unmanned aerial vehicle in the aerial cluster heterogeneous platform takes the magnetic detection width as a space, and each unmanned aerial vehicle flies in parallel to detect a target; after any unmanned aerial vehicle in the aerial cluster heterogeneous platform searches a magnetic target signal, each unmanned aerial vehicle changes a flight path and continues to carry out flight detection according to the changed flight path to acquire signal data; and establishing a magnetic positioning solving model according to the signal data of each unmanned aerial vehicle and the relative position between each unmanned aerial vehicle, and optimizing the target based on the magnetic positioning solving model so as to position the magnetic abnormal target. By applying the technical scheme of the invention, the technical problems of low positioning efficiency and poor positioning accuracy of the magnetic target identification method in the prior art are solved.)

1. A multi-machine cluster magnetic target positioning method is characterized by comprising the following steps:

constructing an aerial cluster heterogeneous platform, wherein the aerial cluster heterogeneous platform comprises at least three unmanned aerial vehicles, and each unmanned aerial vehicle carries a magnetometer as a magnetic field measurement unit;

each unmanned aerial vehicle in the aerial cluster heterogeneous platform takes magnetic detection width as a distance, and each unmanned aerial vehicle flies in parallel to detect a target;

after any unmanned aerial vehicle in the aerial cluster heterogeneous platform searches a magnetic target signal, each unmanned aerial vehicle changes a route and continues to fly and detect according to the changed route to acquire signal data;

and establishing a magnetic positioning solving model according to the signal data of each unmanned aerial vehicle and the relative position between the unmanned aerial vehicles, and optimizing the target based on the magnetic positioning solving model so as to position the magnetic abnormal target.

2. The multi-machine cluster magnetic target positioning method according to claim 1, wherein the aerial cluster heterogeneous platform includes three drones, and when any one of the drones in the aerial cluster heterogeneous platform searches for a magnetic target signal, each of the drones specifically changes routes including: when the unmanned aerial vehicle in the middle detects the magnetic abnormal signal, the three unmanned aerial vehicles change routes along a first route track; when the unmanned aerial vehicle located at the side detects the magnetic anomaly signal, the unmanned aerial vehicle changes the air route along the second air route track.

3. The multi-machine cluster magnetic target positioning method as claimed in claim 2, wherein the three unmanned aerial vehicles specifically change course along the first course trajectory comprises: the first unmanned machine in the middle detects the magnetic abnormal signal, the maximum position of the magnetic abnormal signal is set as an O point, the first unmanned machine turns for 270 degrees, and the path of the first unmanned machine after turning passes through the O point again; the second unmanned aerial vehicle that is located first avris carries out 180 turns and to first unmanned aerial vehicle's air route is close to, and the third unmanned aerial vehicle that is located the second avris carries out 180 turns and to first unmanned aerial vehicle's air route is close to.

4. The multi-machine cluster magnetic target positioning method as claimed in claim 2, wherein the three unmanned aerial vehicles changing course along the second course trajectory specifically comprises: the second unmanned aerial vehicle located on the first side detects the magnetic anomaly signal, the maximum position of the magnetic anomaly signal is set as a point P, the third unmanned aerial vehicle located on the second side turns for 270 degrees, and the path of the turned third unmanned aerial vehicle passes through the point P again; the second unmanned aerial vehicle located on the first side makes a 180-degree turn, and the first unmanned aerial vehicle located in the middle makes a 180-degree turn.

5. The multi-machine cluster magnetic target positioning method according to any one of claims 1 to 4, wherein optimizing a target based on the magnetic positioning solution model to position a magnetic anomaly target specifically comprises: and establishing a target optimization model according to the magnetic positioning solving model and the actual magnetic field detection values of the three unmanned aerial vehicles, and optimizing a target according to the target optimization model so as to position the magnetic abnormal target.

6. The multi-machine cluster magnetic target positioning method as claimed in claim 5, wherein the magnetic positioning solution model is based onTo obtain, wherein, mu₀In order to have a magnetic permeability of air,a target magnetic moment for a magnetic anomaly,is the vector distance of the magnetic anomaly target relative to the first unmanned machine,the vector distance of the second drone with respect to the first drone,vector distance of the third drone relative to the first drone, B₁(t_i) For the theoretical calculation of the magnetic field on the first unmanned flight path, B₂(t_i) A theoretical calculation of the magnetic field on the course of the second drone, B₃(t_i) And theoretically calculating the magnetic field on the third unmanned aerial vehicle route.

7. The multi-machine cluster magnetic target positioning method according to claim 6, wherein the target optimization model is minf ═ B [ (B)_c1(t_i)-B₁(t_i))²+(B_c2(t_i)-B₂(t_i))²+(B_c3(t_i)-B₃(t_i))²]Wherein B is_c1(t_i) The actual magnetic field detection value of the first nobody, B_c2(t_i) Actual magnetic field detection values for a second drone, B_c3(t_i) Actual magnetic field detection values for the third drone.

8. The multi-machine cluster magnetic target positioning method as claimed in claim 7, wherein the magnetic detection width W of any unmanned aerial vehicle is determined according toAnd obtaining, wherein L is the detection distance of any unmanned aerial vehicle, and h is the flight height of any unmanned aerial vehicle.

9. An aerial cluster heterogeneous platform, which is characterized in that the aerial cluster heterogeneous platform uses the multi-machine cluster magnetic target positioning method of any one of claims 1 to 8 to position a magnetic abnormal target.

Technical Field

The invention relates to the technical field of resource exploration and underwater target detection, in particular to a multi-machine cluster magnetic target positioning method and an aerial cluster heterogeneous platform using the same.

Background

The geomagnetic field generally changes regularly and slowly along with time and space, and when a magnetic substance exists, the magnetic field of the substance and the magnetic field induced under the geomagnetic field are superposed on the geomagnetic field, so that the geomagnetic field is abnormal in a certain area. A large amount of metal mineral products are stored in earth land and sea, underwater military equipment such as submarines, mines and the like are mainly made of metal materials, and magnetic substances in the metal materials can cause the abnormity of the surrounding geomagnetic field. Therefore, the detection and identification of the magnetic substance are realized by detecting and identifying the geomagnetic field abnormal information, the application in the fields of resource exploration, underwater target detection and the like is wide, and the method is a key core technology which needs to be promoted urgently in national economic development and national defense construction.

At present, a magnetic detection system detects, identifies and positions underwater magnetic targets, and generally adopts a man-machine or an unmanned aerial vehicle as a carrier to carry out flight detection. Because the spatial distribution of the magnetic target signals presents the peak-valley transformation characteristic, when a manned machine or unmanned machine is adopted for detection, the magnetic target often needs to fly repeatedly above the magnetic target until the magnetic target flies over the top of the magnetic target, and the detection, identification and positioning of the magnetic abnormal signals can be realized. The method for detecting has the defects of long detection time, low detection efficiency, easy loss of moving targets and the like; meanwhile, due to the lack of magnetic signals at different heights, under the condition that the magnetic moment and the position of the target are unknown, the positioning error of the target height information is large. Therefore, the traditional magnetic target identification method of the magnetic detection system has the defects of low positioning efficiency, poor positioning accuracy and the like, and the related application of the method in the fields of national economic development and national defense construction is limited.

Disclosure of Invention

The invention provides a multi-machine cluster magnetic target positioning method and an aerial cluster heterogeneous platform using the same, which can solve the technical problems of low positioning efficiency and poor positioning accuracy of a magnetic target identification method of a magnetic detection system in the prior art.

According to an aspect of the present invention, a method for positioning a multi-machine cluster magnetic target is provided, where the method for positioning a multi-machine cluster magnetic target includes: constructing an aerial cluster heterogeneous platform, wherein the aerial cluster heterogeneous platform comprises at least three unmanned aerial vehicles, and each unmanned aerial vehicle carries a magnetometer as a magnetic field measurement unit; each unmanned aerial vehicle in the aerial cluster heterogeneous platform takes the magnetic detection width as a space, and each unmanned aerial vehicle flies in parallel to detect a target; after any unmanned aerial vehicle in the aerial cluster heterogeneous platform searches a magnetic target signal, each unmanned aerial vehicle changes a flight path and continues to carry out flight detection according to the changed flight path to acquire signal data; and establishing a magnetic positioning solving model according to the signal data of each unmanned aerial vehicle and the relative position between each unmanned aerial vehicle, and optimizing the target based on the magnetic positioning solving model so as to position the magnetic abnormal target.

Further, the aerial cluster heterogeneous platform comprises three unmanned aerial vehicles, and when any unmanned aerial vehicle in the aerial cluster heterogeneous platform searches for a magnetic target signal, each unmanned aerial vehicle changes a course and specifically comprises: when the unmanned aerial vehicle in the middle detects the magnetic abnormal signal, the three unmanned aerial vehicles change the route along the first route track; when the unmanned aerial vehicle on the side detects the magnetic anomaly signal, the three unmanned aerial vehicles change the air route along the second air route track.

Further, the three unmanned aerial vehicles changing routes along the first route track specifically include: the first unmanned machine in the middle detects the magnetic abnormal signal, the maximum position of the magnetic abnormal signal is set as an O point, the first unmanned machine turns for 270 degrees, and the path of the first unmanned machine after turning passes through the O point again; the second unmanned aerial vehicle located on the first side makes a 180-degree turn and approaches to the first unmanned aerial vehicle, and the third unmanned aerial vehicle located on the second side makes a 180-degree turn and approaches to the first unmanned aerial vehicle.

Further, the three unmanned aerial vehicles changing the route along the second route track specifically include: the second unmanned aerial vehicle located on the first side detects the magnetic anomaly signal, the maximum position of the magnetic anomaly signal is set as a point P, the third unmanned aerial vehicle located on the second side turns for 270 degrees, and the path of the turned third unmanned aerial vehicle passes through the point P again; the second unmanned aerial vehicle located on the first side makes a 180-degree turn, and the first unmanned aerial vehicle located in the middle makes a 180-degree turn.

Further, optimizing the target based on the magnetic localization solution model to localize the magnetic anomaly target specifically includes: and establishing a target optimization model according to the magnetic positioning solving model and the actual magnetic field detection values of the three unmanned aerial vehicles, and optimizing the target according to the target optimization model so as to position the magnetic abnormal target.

Further, the magnetic localization solution model may be based onTo obtain, wherein, mu₀In order to have a magnetic permeability of air,a target magnetic moment for a magnetic anomaly,is the vector distance of the magnetic anomaly target relative to the first unmanned machine,the vector distance of the second drone with respect to the first drone,vector distance of the third drone relative to the first drone, B₁(t_i) For the theoretical calculation of the magnetic field on the first unmanned flight path, B₂(t_i) A theoretical calculation of the magnetic field on the course of the second drone, B₃(t_i) And theoretically calculating the magnetic field on the third unmanned aerial vehicle route.

Further, the target optimization model is minf ═[(B_c1(t_i)-B₁(t_i))²+(B_c2(t_i)-B₂(t_i))²+(B_c3(t_i)-B₃(t_i))²]Wherein B is_c1(t_i) The actual magnetic field detection value of the first nobody, B_c2(t_i) Actual magnetic field detection values for a second drone, B_c3(t_i) Actual magnetic field detection values for the third drone.

Further, the magnetic detection width W of any unmanned aerial vehicle can be determined according toAnd obtaining, wherein L is the detection distance of any unmanned aerial vehicle, and h is the flight height of any unmanned aerial vehicle.

According to another aspect of the invention, an aerial cluster heterogeneous platform is provided, and the aerial cluster heterogeneous platform uses the multi-machine cluster magnetic target positioning method to position the magnetic abnormal target.

The technical scheme of the invention is applied, a multi-machine cluster magnetic target positioning method is provided, the method is based on a plurality of unmanned aerial vehicles to construct an aerial cluster heterogeneous platform, each unmanned aerial vehicle carries a magnetometer as a magnetic field measurement unit, in the process that the unmanned aerial vehicles fly to search magnetic targets, the unmanned aerial vehicles in the aerial cluster heterogeneous platform take magnetic detection width as spacing, each unmanned aerial vehicle flies in parallel to detect, when any unmanned aerial vehicle searches magnetic target signals, each unmanned aerial vehicle changes course and reduces spacing, and the unmanned aerial vehicles fly above the magnetic targets, so that the targets are accurately positioned. Compared with the prior art, the multi-machine cluster magnetic target positioning method provided by the invention is improved into an unmanned aerial vehicle cluster networking detection mode from a traditional single-man-machine or unmanned aerial vehicle detection mode, and the method can realize one-time flight positioning without enabling an aircraft platform to repeatedly fly, so that the detection efficiency is high; meanwhile, the method can utilize a plurality of unmanned aerial vehicles to construct different formations, and can acquire the signal information of the magnetic target in different horizontal and vertical gradient directions, so that the positioning precision is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic diagram illustrating an air-clustered heterogeneous platform networking probe provided in accordance with an embodiment of the present invention;

figure 2 shows a schematic diagram of three drones changing course along a first course trajectory, provided in accordance with a specific embodiment of the present invention;

fig. 3 shows a schematic diagram of three drones changing course along a second course trajectory, provided in accordance with a specific embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1, a method for positioning a multi-machine cluster magnetic target according to an embodiment of the present invention includes: constructing an aerial cluster heterogeneous platform, wherein the aerial cluster heterogeneous platform comprises at least three unmanned aerial vehicles, and each unmanned aerial vehicle carries a magnetometer as a magnetic field measurement unit; each unmanned aerial vehicle in the aerial cluster heterogeneous platform takes the magnetic detection width as a space, and each unmanned aerial vehicle flies in parallel to detect a target; after any unmanned aerial vehicle in the aerial cluster heterogeneous platform searches a magnetic target signal, each unmanned aerial vehicle changes a flight path and continues to carry out flight detection according to the changed flight path to acquire signal data; and establishing a magnetic positioning solving model according to the signal data of each unmanned aerial vehicle and the relative position between each unmanned aerial vehicle, and optimizing the target based on the magnetic positioning solving model so as to position the magnetic abnormal target.

By applying the configuration mode, a multi-machine cluster magnetic target positioning method is provided, the method is characterized in that an aerial cluster heterogeneous platform is constructed based on a plurality of unmanned aerial vehicles, each unmanned aerial vehicle carries a magnetometer as a magnetic field measuring unit, in the process of searching a magnetic target by flying the unmanned aerial vehicles, the unmanned aerial vehicles in the aerial cluster heterogeneous platform use magnetic detection width as intervals, each unmanned aerial vehicle carries out parallel flying detection, and after any unmanned aerial vehicle searches a magnetic target signal, each unmanned aerial vehicle changes course and reduces the interval, and the unmanned aerial vehicles fly above the magnetic target, so that the target is accurately positioned. Compared with the prior art, the multi-machine cluster magnetic target positioning method provided by the invention is improved into an unmanned aerial vehicle cluster networking detection mode from a traditional single-man-machine or unmanned aerial vehicle detection mode, and the method can realize one-time flight positioning without enabling an aircraft platform to repeatedly fly, so that the detection efficiency is high; meanwhile, the method can utilize a plurality of unmanned aerial vehicles to construct different formations, and can acquire the signal information of the magnetic target in different horizontal and vertical gradient directions, so that the positioning precision is high. Therefore, the magnetic target positioning method provided by the invention greatly improves the positioning efficiency and the positioning precision, and realizes the high-efficiency identification and high-precision positioning of the magnetic abnormal signals.

In the invention, the number of the aerial cluster heterogeneous platforms is three or more than three unmanned aerial vehicles, and the three unmanned aerial vehicles are used as the minimum cluster unit. In order to further improve the detection efficiency, four, five or even more unmanned aerial vehicles can be selected for positioning the target at the same time. The following takes an aerial cluster heterogeneous platform composed of three unmanned aerial vehicles as an example to illustrate a specific process of magnetic target positioning.

The method comprises the steps of firstly, constructing an aerial cluster heterogeneous platform, wherein the aerial cluster heterogeneous platform comprises three unmanned aerial vehicles, and any unmanned aerial vehicle carries a magnetometer to serve as a magnetic field measurement unit so as to realize efficient identification and high-precision positioning of magnetic anomaly signals.

And step two, in the process of searching the magnetic target by the flying unmanned aerial vehicles, each unmanned aerial vehicle in the aerial cluster heterogeneous platform takes the magnetic detection width as a space, and each unmanned aerial vehicle flies in parallel to detect the target. The magnetic detection width W of any unmanned aerial vehicle can be determined according toAnd obtaining, wherein L is the detection distance of any unmanned aerial vehicle, and h is the flight height of any unmanned aerial vehicle. Three areThe unmanned aerial vehicle uses magnetic detection width W as the interval to carry out parallel flight detection, searches for magnetic anomaly signals, and when the detected magnetic field signal appears and the signal-to-noise ratio is not less than 1.2, then judges that the magnetic anomaly signal appears, and the unmanned aerial vehicle needs to change the air route in order to carry out the location of magnetic target.

And step three, after any unmanned aerial vehicle in the aerial cluster heterogeneous platform searches the magnetic target signal, each unmanned aerial vehicle changes the air route and continues to fly and detect according to the changed air route to acquire signal data. Specifically, the aerial cluster heterogeneous platform comprises three unmanned aerial vehicles, and when the unmanned aerial vehicle in the middle detects a magnetic anomaly signal, the three unmanned aerial vehicles change routes along a first route track; when the unmanned aerial vehicle on the side detects the magnetic anomaly signal, the three unmanned aerial vehicles change the air route along the second air route track.

Specifically, in the present invention, if the central drone detects the magnetic anomaly signal, the three drones specifically change the course along the first course trajectory includes: the first unmanned machine in the middle detects the magnetic abnormal signal, the maximum position of the magnetic abnormal signal is set as an O point, the first unmanned machine turns for 270 degrees, and the path of the first unmanned machine after turning passes through the O point again; the second unmanned aerial vehicle located on the first side makes a 180-degree turn and approaches to the first unmanned aerial vehicle, and the third unmanned aerial vehicle located on the second side makes a 180-degree turn and approaches to the first unmanned aerial vehicle. The spacing between any two adjacent drones after turning is reduced to 1/2W, as shown in fig. 2. And the three unmanned aerial vehicles continue flying and detecting according to the first route track to acquire magnetic signal data.

If the unmanned aerial vehicle on the side is detected as the magnetic anomaly signal, the three unmanned aerial vehicles change the route along the second route track specifically comprise: the second unmanned aerial vehicle located on the first side detects the magnetic anomaly signal, the maximum position of the magnetic anomaly signal is set as a point P, the third unmanned aerial vehicle located on the second side turns for 270 degrees, and the path of the turned third unmanned aerial vehicle passes through the point P again; the second unmanned aerial vehicle located on the first side makes a 180-degree turn, and the first unmanned aerial vehicle located in the middle makes a 180-degree turn. The original air route of the second unmanned aerial vehicle which detects the magnetic anomaly signal is taken as a symmetrical line of the air route after turning, and the distance between the second unmanned aerial vehicle and the first unmanned aerial vehicle after turning is reduced to 1/2W. And the three unmanned aerial vehicles continue flying and detecting according to the second route track to acquire magnetic signal data.

In the invention, when the number of the cluster heterogeneous platforms in the air is four or more, each unmanned aerial vehicle takes the magnetic detection width as an interval, each unmanned aerial vehicle flies in parallel to detect a target, when one unmanned aerial vehicle detects a magnetic anomaly signal and the position of the unmanned aerial vehicle is not at the side, the track change of three unmanned aerial vehicles formed by the unmanned aerial vehicle and two adjacent unmanned aerial vehicles is the same as the change of the three unmanned aerial vehicles along the first track, the three unmanned aerial vehicles after the track change work together to complete the positioning of the target, and the rest unmanned aerial vehicles finish the detection work. When one of them unmanned aerial vehicle detected magnetism abnormal signal, and this unmanned aerial vehicle position is in the avris, then this unmanned aerial vehicle is the same with the mode that three unmanned aerial vehicle that two unmanned aerial vehicles of its side faced the track change of three unmanned aerial vehicle that the side constitutes along the change of second track with above-mentioned three unmanned aerial vehicle, changes the three unmanned aerial vehicle joint work after the track and accomplishes the location of target, remaining unmanned aerial vehicle finishes detecting the work.

And fourthly, establishing a magnetic positioning solving model according to the signal data of each unmanned aerial vehicle and the relative position between the unmanned aerial vehicles, and optimizing the target based on the magnetic positioning solving model so as to position the magnetic abnormal target.

Specifically, in the present invention, optimizing the target based on the magnetic localization solution model to localize the magnetic anomaly target specifically includes: and establishing a target optimization model according to the magnetic positioning solving model and the actual magnetic field detection values of the three unmanned aerial vehicles, and optimizing the target according to the target optimization model so as to position the magnetic abnormal target. The magnetic localization solution model may be based onTo obtain, wherein, mu₀Is air permeability, mu₀＝4π×10^-7，A target magnetic moment for a magnetic anomaly,is the vector distance of the magnetic anomaly target relative to the first unmanned machine,the vector distance of the second drone with respect to the first drone,vector distance of the third drone relative to the first drone, B₁(t_i) For the theoretical calculation of the magnetic field on the first unmanned flight path, B₂(t_i) A theoretical calculation of the magnetic field on the course of the second drone, B₃(t_i) And theoretically calculating the magnetic field on the third unmanned aerial vehicle route.

Suppose the actual probe values of three drones are B_c1(t_i),B_c2(t_i),B_c3(t_i) Then, a target optimization model can be established, where the target optimization model is minf ═ B_c1(t_i)-B₁(t_i))²+(B_c2(t_i)-B₂(t_i))²+(B_c3(t_i)-B₃(t_i))²]Wherein B is_c1(t_i) The actual magnetic field detection value of the first nobody, B_c2(t_i) Actual magnetic field detection values for a second drone, B_c3(t_i) Actual magnetic field detection values for the third drone.

Performing optimization calculation according to the established target optimization model to obtain the optimal variable, so as to obtain the magnetic abnormal target magnetic momentAnd position

According to another aspect of the invention, an aerial cluster heterogeneous platform is provided, and the aerial cluster heterogeneous platform uses the multi-machine cluster magnetic target positioning method to position the magnetic abnormal target. The multi-machine cluster magnetic target positioning method does not need to enable the flying platform to fly repeatedly, and can realize one-time flying positioning, so the detection efficiency is high; meanwhile, the method utilizes a plurality of unmanned aerial vehicles to construct different formations, and can acquire magnetic signal information of the magnetic target in different horizontal and vertical gradient directions, so that the positioning precision is high.

For further understanding of the present invention, the following describes the multi-machine cluster magnetic target positioning method provided by the present invention in detail with reference to fig. 1 and fig. 2.

As shown in fig. 1 and fig. 2, a multi-machine cluster magnetic target positioning method is provided according to an embodiment of the present invention, and specifically includes the following steps.

The method comprises the steps of firstly, constructing an aerial cluster heterogeneous platform, wherein the aerial cluster heterogeneous platform comprises three unmanned aerial vehicles, and any unmanned aerial vehicle carries a magnetometer to serve as a magnetic field measurement unit so as to realize efficient identification and high-precision positioning of magnetic anomaly signals.

And step two, in the process of searching the magnetic target by the flying unmanned aerial vehicles, each unmanned aerial vehicle in the aerial cluster heterogeneous platform takes the magnetic detection width as a space, and each unmanned aerial vehicle flies in parallel to detect the target. The magnetic detection width W of any unmanned aerial vehicle can be determined according toAnd obtaining, wherein L is the detection distance of any unmanned aerial vehicle, and h is the flight height of any unmanned aerial vehicle. The three unmanned aerial vehicles use the magnetic detection width W as a distance to carry out parallel flight detection, search for magnetic anomaly signals, judge that the magnetic anomaly signals appear when the detected magnetic field signals appear and the signal-to-noise ratio is not less than 1.2, and the unmanned aerial vehicles need to change the air route to position the magnetic target.

Thirdly, when the unmanned aerial vehicle in the middle of the aerial cluster heterogeneous platform searches for a magnetic target signal and the maximum position of the magnetic abnormal signal is set as an O point, the first unmanned aerial vehicle turns for 270 degrees, and the path of the turned first unmanned aerial vehicle passes through the O point again; the second unmanned aerial vehicle located on the first side makes a 180-degree turn and approaches to the first unmanned aerial vehicle, and the third unmanned aerial vehicle located on the second side makes a 180-degree turn and approaches to the first unmanned aerial vehicle. After turning, the distance between any two adjacent unmanned aerial vehicles is reduced to 1/2W, and the three unmanned aerial vehicles continue flying and detecting according to the first route track to acquire magnetic signal data.

And step four, establishing a target optimization model according to the magnetic positioning solving model and the actual magnetic field detection values of the three unmanned aerial vehicles, and optimizing the target according to the target optimization model so as to position the magnetic abnormal target. The magnetic localization solution model may be based onTo obtain, the target optimization model is minf ═ B_c1(t_i)-B₁(t_i))²+(B_c2(t_i)-B₂(t_i))²+(B_c3(t_i)-B₃(t_i))²]. Performing optimization calculation according to the established target optimization model to obtain the optimal variable, so as to obtain the magnetic abnormal target magnetic momentAnd positionThereby achieving the positioning of the target.

In conclusion, the invention provides a multi-machine cluster magnetic target positioning method, which is characterized in that an aerial cluster heterogeneous platform is constructed based on a plurality of unmanned aerial vehicles, a magnetometer is carried to serve as a magnetic field measurement unit, so that the high-efficiency identification and high-precision positioning of magnetic anomaly signals are realized, and compared with the existing magnetic detection system which adopts a single large-scale man-machine to perform magnetic target positioning, the method does not need to enable a flying platform to fly repeatedly, can realize one-time flying positioning, and is high in detection efficiency; meanwhile, the method utilizes a plurality of unmanned aerial vehicles to construct different formations, and can obtain the magnetic signal information of the magnetic target in different horizontal and vertical gradient directions, so that the positioning precision is high, and the method can be used for detecting the magnetic target in various fields such as military, civil and the like.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.