A radar detection multi-target discrimination device and discrimination method

Abstract

The present invention relates to a radar detection multi-target discrimination device and a discrimination method, belonging to the technical field of radar detection, and solves the problem that when multiple targets are detected by radar and used and processed at the backend in the prior art, it occupies monitoring resources and has low efficiency. The present invention includes a radar processing terminal and a target networking device. The radar processing terminal includes a radar and a processing device. The radar detects targets and obtains the azimuth and distance data of all targets within the irradiation range. The target networking device is disposed on a trusted target and is used to obtain the geographical location data of the trusted target. The processing device compares and matches all target data reported by the radar with the geographical location data of the trusted target obtained by the target networking device in real time. The present invention discriminates the targets detected by the radar, and only tracks the targets other than the trusted targets, reducing resource occupancy and improving detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of radar detection, and in particular, to a radar detection multi-target discrimination device and a discrimination method. Background Art

[0002] In the application of radar detection, a radar can often capture a large number of targets within the detection area. After the radar locks or finds a target, it immediately pays attention to the target, such as by using video follow-up, tracking, or target attribute recognition. However, among the large number of targets obtained, there are targets that are not of interest or do not need to be deeply understood in the current detection. Often, such targets are invalid targets or targets that do not need to be concerned, such as one's own people, which results in a waste of monitoring resources and low detection efficiency of the radar for targets. Summary of the Invention

[0003] In view of the above analysis, the embodiments of the present invention aim to provide a radar detection multi-target discrimination device and a discrimination method to solve the problem of occupying monitoring resources and low efficiency when the existing radar detects multiple targets and is used and processed at the backend.

[0004] On the one hand, the present invention provides a radar detection multi-target discrimination device, including a radar processing terminal and a target networking device. The radar processing terminal includes a radar and a processing device. The radar detects targets and obtains the azimuth and distance data of all targets within the irradiation range. The target networking device is disposed on a trusted target and is used to obtain the geographical location data of the trusted target. The processing device compares and matches all target data reported by the radar with the geographical location data of the trusted target obtained by the target networking device in real time.

[0005] Further, when the processing device and the target networking device perform networking to share location information, the radar can perform secondary calculation of azimuth and distance in the manner of the current geographical location information and the geographical location information of the trusted target to distinguish and screen the targets.

[0006] Further, the processing device obtains the data of the current geographical location information of the radar through the Beidou satellite navigation system or GPS.

[0007] Further, the target networking device obtains the geographical location information of the trusted target through the Beidou satellite navigation system or GPS.

[0008] Further, the target networking device is a mobile phone, a secondary radar, or a microwave broadcast response device.

[0009] Further, the processing device includes a Beidou or GPS positioning function, a communication function with the target networking device, and a related processing function of its own location information and target location information.

[0010] Furthermore, the target networking device includes a Beidou or GPS positioning function and a communication function with the processing device.

[0011] On the other hand, the present invention provides a method for distinguishing multiple radar detection targets. Using the above-mentioned radar detection multi-target distinguishing device, the steps include:

[0012] S1: The radar detects all targets within the irradiation area and obtains the azimuth and distance data of all targets; the target networking device obtains the geographical location data of trusted targets.

[0013] S2: The processing device simultaneously obtains all target data obtained by the radar and the data of trusted targets obtained by the target networking device.

[0014] S3: The processing device compares and matches all target data reported by the radar with the geographical location data of trusted targets obtained by the target networking device in real time.

[0015] S4: If the match is successful, it is reported as a trusted target; otherwise, it is reported as an unknown target and subsequent tracking, observation, and identification processing are performed on the unknown target to complete target differentiation.

[0016] Furthermore, according to the time of the target networking device obtained and the longitude and latitude of the target carrying the target networking device at the corresponding time, distance calculation is performed, and the distance between two longitudes and latitudes is L1; at the same time, the time of the target networking device and the longitude and latitude of the target not carrying the target networking device at the corresponding time are calculated for distance calculation, and the distance between two longitudes and latitudes is L2.

[0017] Furthermore, if L1 < L, it can be determined that the target is a non-suspicious target, and the radar does not need to continue tracking; if L2 > L, outside the matching threshold, it is determined that the target is a suspicious target, and the radar can continue to track it.

[0018] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0019] The radar of the present invention obtains the azimuth and distance data of all targets within the irradiation range, the target networking device obtains the geographical location data of trusted targets, and the processing device compares in real time all target data reported by the radar with the geographical location data of trusted targets obtained by the target networking device, and only pays attention to other targets, without including invalid targets that need to be paid attention to among all targets or targets that do not need to be paid attention to, reducing waste of resources and improving detection efficiency at the same time.

[0020] In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent specification. Moreover, some advantages can be made obvious from the specification or understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained from the content specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are only for the purpose of showing specific embodiments and are not considered as limiting the present invention. Throughout the drawings, the same reference signs denote the same components.

[0022] Figure 1 FIG. is a schematic structural diagram of a radar detection multi-target discrimination device for a specific embodiment;

[0023] Figure 2 FIG. is a flowchart of a radar detection multi-target discrimination method for a specific embodiment.

[0024] Reference Signs:

[0025] 1 - Radar processing terminal; 11 - Radar; 12 - Processing device; 2 - Target networking device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will specifically describe the preferred embodiments of the present invention with reference to the drawings. The drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principles of the present invention, rather than to limit the scope of the present invention.

[0027] Embodiment 1

[0028] A specific embodiment of the present invention, as Figure 1 shown, discloses a radar detection multi-target discrimination device, including a radar processing terminal 1 and a target networking device 2. The radar processing terminal 1 includes a radar 11 and a processing device 12. The radar 11 detects targets, obtains data such as the azimuth and distance of all targets within the irradiation range, and reports the obtained target data to the processing device 12. The target networking device 2 is disposed on a trusted target and is used to obtain the geographical location data of the trusted target. The processing device 12 compares all the target data reported by the radar 11 with the geographical location data of the trusted target obtained by the target networking device 2 in real time, and the processing device 12 processes the targets other than the trusted target.

[0029] It should be noted that the trusted target is an invalid target or a target that does not need to be concerned about.

[0030] Compared with the prior art, for the radar detection multi-target discrimination device provided in this embodiment, the radar acquires the azimuth and distance data of all targets within the irradiation range, the target networking device acquires the geographical location data of trusted targets, and the processing device compares in real time the data of all targets reported by the radar with the geographical location data of trusted targets acquired by the target networking device, and only pays attention to other targets, without including ineffective targets that need to be concerned among all targets or targets that do not need to be concerned, reducing waste of resources and improving the detection efficiency at the same time.

[0031] Radar 11 detects all targets within the irradiation area. After detecting a target, through processing (Radar 11 calculates the target longitude and latitude information based on the direction of the directional radar antenna and the longitude and latitude of Radar 11), it reports information such as the azimuth and distance of the detected target to the processing device 12. At this time, the targets reported by Radar 11 may include ineffective targets or targets that do not need to be concerned, such as trustworthy "insiders" like passing humans, vehicles, and airplanes. If all targets detected by Radar 11 are not discriminated, that is, if trusted targets are not distinguished from other targets and other targets outside the trusted targets are also concerned, a large amount of data needs to be processed, occupying more device resources and preventing Radar 11 from quickly detecting and identifying targets.

[0032] In order to discriminate such target (i.e., trusted target) information, the above-mentioned target networking device 2 is provided in the radar detection multi-target discrimination device. When the processing device 12 and the target networking device 2 are networked to share location information, Radar 11 can perform secondary calculations of azimuth and distance in the way of the current geographical location information (geodetic coordinate system) and the geographical location information of trusted targets to distinguish and screen the targets. That is to say, Radar 11 calculates the target longitude and latitude information based on the direction of the directional radar antenna and the longitude and latitude data of Radar 11, and calculates the azimuth and distance calculation information of the detected target. In the same coordinate system, distance-related calculations can be performed through the longitudes and latitudes of two targets. The related calculation is a matching calculation. The closer the distance, the greater the possibility that the two are the same target.

[0033] In order to acquire the current geographical location information of Radar 11, a Beidou satellite navigation system or GPS (Global Positioning System) is provided in the processing device 12 to acquire the data of the current geographical location information of Radar 11 through the Beidou satellite navigation system or GPS.

[0034] In order to acquire the geographical location information of trusted targets, a Beidou satellite navigation system or GPS is provided in the target networking device 12 to acquire the geographical location information of trusted targets through the Beidou satellite navigation system or GPS. The target networking device 12 can be a mobile phone, a secondary radar, or a microwave broadcast response device.

[0035] Understandably, the geographical location information of the trusted target can be obtained through the Beidou satellite navigation system or GPS in the mobile phone, secondary radar or microwave broadcast response device carried by the trusted target itself.

[0036] In this embodiment, the processing device 12 compares all the target data reported by the radar 11 with the geographical location information of the trusted targets in the network in real time. For the targets within a certain range (i.e., the search range of the radar 11) of the trusted target location information, the processing device 12 does not process or pay attention to them. That is, the camera does not perform follow-up focusing, and the optoelectronic radar does not perform tracking and locking, etc., so as to achieve the purpose of saving the processing resources at the back end of the radar.

[0037] In order to achieve the purpose of multi-target discrimination, the radar multi-target discrimination device includes the above-mentioned processing device 12 and the target networking device 2. The processing device 12 has the following functions:

[0038] (I) Beidou or GPS positioning function;

[0039] (II) Communication function with the target networking device 2;

[0040] (III) Function of processing the correlation between its own location information and the target location information. It should be noted that the relevant processing refers to distance correlation: that is, the distance between the two is calculated through the longitude and latitude information.

[0041] The target networking device 2 has the following functions:

[0042] (I) Beidou or GPS positioning function;

[0043] (II) Communication function with the processing device 12.

[0044] According to the functional characteristics of the processing device 12 and the target networking device 2, while achieving the function of multi-target discrimination, in order to save the software and hardware costs, the target networking device 2 can be replaced by common devices such as mobile phones. When in use, people and drivers entering the radar irradiation area carry the target networking device 2 (i.e., the mobile phone). After turning on the communication function with the processing device 12, they interact with the processing device 12 in real time for geographical location information. The processing device 12 calculates the attributes of the target according to the geographical location information of the target networking device 2. It should be noted that the target networking device 2 is a trusted target, but the radar can only know the longitude and latitude information of the target networking device and cannot directly obtain its attributes. It needs to be matched with the target detected by the radar 11, that is, relevant calculations are performed.

[0045] It should be noted that when the processing device 12 performs correlation processing on the target data detected by the radar 11 and the data of the target networking device 2 (the correlation degree is that the distance between the two within the constraint range at the same time), it must receive the valid target data (time and longitude and latitude information) of both devices (radar 11 and target networking device 2). If the valid data in the target networking device 2 is not received, it can be regarded as no data, and subsequent tracking, observation, and identification processing are performed on all targets detected by the radar 11.

[0046] When the processing device 12 performs correlation processing on the targets detected by the radar 11 (the correlation degree is that the distance between the two within the constraint range at the same time), all target data can be converted into the longitude and latitude of the geodetic coordinates, or all target data can be converted into the azimuth and distance relative to the irradiation direction of the radar 11.

[0047] Exemplarily, when using the radar to detect the multi-target discrimination device, both target A and target B are found within the irradiation range of the radar 11. At this time, target A is equipped with the target networking device 2, which can also be a mobile phone with the function of the target networking device 2. When the radar processing terminal 1 discovers two targets and needs to further understand the two targets more deeply (such as camera focusing video follow-up, optoelectronic radar follow-up, etc.) to obtain more concerned information, since target A is equipped with the target networking device 2, target A can be listed as a reliable target and the friendly target sequence is not observed or postponed for observation. First, the target identity of target B is observed. This process enables the radar processing terminal 1 to reduce the number of concerned targets, thereby improving the operation efficiency and reducing equipment occupancy and resource waste.

[0048] The radar detection multi-target discrimination device provided in this embodiment can be applied to areas such as border monitoring that require large-area radar, personnel, and vehicle monitoring, so as to reduce the monitoring personnel's active judgment of the target suspicion degree. A large number of screened suspicious targets are already in front of the monitoring personnel, solving the problem of a large number of alarms in these areas, and avoiding the problems of large workload and low efficiency caused by all data being reported to the command post after the radar in the existing border area detects a target and being identified by the naked eye through video.

[0049] Embodiment 2

[0050] Another specific embodiment of the present invention is as Figure 2 shown, and discloses a radar detection multi-target discrimination method, which uses the radar detection multi-target discrimination device of Embodiment 1. The steps include:

[0051] S1: The radar 11 detects all targets in the irradiation area and obtains data such as the azimuth and distance of all targets; the target networking device 2 obtains the geographical location data of the trusted targets.

[0052] S2: The processing device 12 simultaneously obtains all the target data acquired by the radar 11 and the data of the trusted targets acquired by the target networking device 2.

[0053] The target networking device 2 communicates with the processing device 12 for data to obtain the geographical location data of the trusted targets. The radar 11 communicates with the processing device 12, and the acquired target data is reported to the processing device 12.

[0054] It should be noted that when the processing device 12 performs relevant processing on the target data detected by the radar 11 and the data of the target networking device 2, it needs to simultaneously receive the valid target data of the radar 11 and the target networking device 2. If the valid data in the target networking device 2 is not received, it can be regarded as no data, and then subsequent tracking, observation, and identification processing will be performed on all the targets detected by the radar 11.

[0055] S3: The processing device 12 continuously and in real-time compares and matches all the target data reported by the radar 11 with the geographical location data of the trusted targets acquired by the target networking device 2.

[0056] Specifically, according to the Beidou or GPS accuracy, the target distance matching threshold L (set according to the actual situation) can be defined. Based on the time obtained from the target networking device 2 and the longitude and latitude of the target carried by the target networking device 2 at the corresponding time, the distance L1 between two longitudes and latitudes is calculated. At the same time, based on the time obtained from the target networking device 2 and the longitude and latitude of the target not carried by the target networking device 2 at the corresponding time, the distance L2 between two longitudes and latitudes is calculated.

[0057] S4: If the matching is successful, it is reported as a trusted target; otherwise, it is reported as an unknown target, and subsequent tracking, observation, and identification processing are performed on the unknown target to complete target differentiation.

[0058] Specifically, through threshold comparison, if L1 < L, it can be determined that this is a non-suspicious target of our side, and the radar 11 does not need to continue tracking; at the same time, if L2 > L, outside the matching threshold, it is determined that this target is a suspicious target, and the radar 11 can continue to track it.

[0059] The following takes two targets as an example for the above method. When using the radar to detect the multi-target differentiation device, targets A and B are simultaneously detected within the irradiation range of the radar 11. At this time, target A carries the target networking device 2.

[0060] The radar 11 can calculate the longitude and latitude data of the detected targets A and B through its own positioning (the longitude and latitude data of the radar antenna in the geodetic coordinate system) and the irradiation direction (the absolute direction of the antenna facing the scanned area), and store the longitude and latitude and the detected time data.

[0061] Target A carrying the target networking device 2 can obtain its own longitude and latitude information and time information through the built-in Beidou or GPS, and send the longitude and latitude information and time to the radar processing terminal 1 through the target networking device 2 (sharing the information through a fixed network, which can be composed of a broadcast network independently formed by the target networking device 2).

[0062] After receiving the time information and position of the target networking device 2, the radar processing terminal 1 performs distance matching on the multiple targets detected by the radar 11.

[0063] According to the accuracy of Beidou or GPS, the target distance matching threshold L can be defined (set according to the actual situation). First, calculate the distance between two longitudes and latitudes L1 based on the time obtained from the target networking device 2 and the longitude and latitude of target A at the corresponding time; at the same time, calculate the distance between two longitudes and latitudes L2 by calculating the time of the target networking device 2 and the longitude and latitude of target B at the corresponding time.

[0064] By comparing with the threshold, if L1 < L, it can be determined that target A is a non-suspicious target of our side, and the radar 11 does not need to continue tracking; at the same time, if L2 > L, outside the matching threshold, it is determined that target B is a suspicious target, and the radar can continue to track it.

[0065] It should be noted that when setting the threshold L, the Beidou accuracy, the detection accuracy of the radar 11, and the range to be distinguished can be considered for design, and it is set to about 10 meters.

[0066] In this embodiment, for the process of distinguishing multiple targets detected by the radar, corresponding functional hardware can be designed separately for processing, or corresponding functional hardware can be added to the radar processing system, and the process function is processed by the radar processing chip.

[0067] The target networking device 2 can develop a response device with similar functions by itself, or use a mobile phone for wireless communication. When using a mobile phone to solve this solution, it can be completed through mobile phone APP and other methods, which is convenient, fast, and low-cost.

[0068] As an alternative implementation technical solution, the target networking device used in the present invention can be replaced by a device such as a mobile phone, or integrated into a radar-related wireless communication device with positioning function (secondary radar); the processing device described in the present invention can be designed with corresponding functional hardware and a processing chip for processing separately, or corresponding functional hardware can be added to the radar processing system, and the process function is completed by the radar processing chip.

[0069] The present invention uses GPS or Beidou positioning to distinguish targets. Compared with other distinguishing methods, this distinguishing method has high accuracy and high reliability.

[0070] As described above, it is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for distinguishing multiple radar detection targets, characterized in that Adopt a radar detection multi-target discrimination device. The radar detection multi-target discrimination device includes a radar processing terminal (1) and a target networking device (2). The radar processing terminal (1) includes a radar (11) and a processing device (12). The radar (11) detects targets, obtains the azimuth and distance data of all targets within the irradiation range, and reports the obtained target data to the processing device (12). The target networking device (2) is disposed on a trusted target and is used to obtain the geographical location data of the trusted target. The processing device (12) compares and matches all the target data reported by the radar (11) with the geographical location data of the trusted target obtained by the target networking device (2) in real time, and the processing device (12) processes the targets other than the trusted target; When the processing device (12) and the target networking device (2) perform networking to share location information, the radar (11) can perform secondary calculation of azimuth and distance in the way of current geographical location information and geographical location information of the trusted target to distinguish and screen the targets; The steps of the radar detection multi-target discrimination method include: S1: The radar (11) detects all targets in the irradiation area and obtains the azimuth and distance data of all targets; the target networking device (2) obtains the geographical location data of the trusted target; S2: The processing device (12) simultaneously obtains all the target data obtained by the radar (11) and the data of the trusted target obtained by the target networking device (2); In the step S2, when the processing device (12) performs relevant processing on the target data detected by the radar (11) and the data of the target networking device (2), it needs to receive the valid target data of both the radar (11) and the target networking device (2) at the same time. If the valid data in the target networking device (2) is not received, it can be regarded as no data, and then subsequent tracking, observation, and identification processing will be performed on all the targets detected by the radar (11); S3: The processing device (12) compares and matches all the target data reported by the radar (11) with the geographical location data of the trusted target obtained by the target networking device (2) in real time; In the step S3, according to the Beidou or GPS accuracy, a target distance matching threshold L is defined. According to the time of the target networking device (2) obtained and the longitude and latitude of the target carrying the target networking device (2) at the corresponding time, the distance is calculated, and the distance between the two longitudes and latitudes is L1; at the same time, the time of the target networking device (2) and the longitude and latitude of the target not carrying the target networking device (2) at the corresponding time are calculated to calculate the distance, and the distance between the two longitudes and latitudes is L2; S4: If the matching is successful, it is reported as a trusted target, otherwise it is reported as an unknown target and subsequent tracking, observation, and identification processing are performed on the unknown target to complete target discrimination; In the step S4, through threshold comparison, if L1 < L, it can be determined that the target is a non-suspicious target, and the radar (11) does not need to continue tracking; if L2 > L, outside the matching threshold, it is determined that the target is a suspicious target, and the radar (11) can continue to track.

2. The radar detection multi-target discrimination method according to claim 1, wherein The processing device (12) obtains data on the current geographical location information of the radar (11) through the Beidou satellite navigation system or GPS.

3. The radar detection multi-target discrimination method according to claim 1, wherein The target networking device (2) obtains the geographical location information of the trusted target through the Beidou satellite navigation system or GPS.

4. The radar detection multi-target discrimination method according to claim 1, wherein The target networking device (2) is a mobile phone, a secondary radar or a microwave broadcast response device.

5. The radar detection multi-target discrimination method according to claim 1, wherein The processing device (12) includes a Beidou or GPS positioning function, a communication function with the target networking device (2), and a processing function related to its own position information and the target position information.

6. The radar detection multi-target discrimination method according to any one of claims 1-5, characterized in that The target networking device (2) includes a Beidou or GPS positioning function and a communication function with the processing device (12).

Images