JP2006242842A - Radar apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radar apparatus capable of enhancing performance by implementing detection and tracking simultaneously by beam partitioning according to the level of importance of targets. <P>SOLUTION: The radar apparatus is equipped with a level of importance computing unit 8 determining the level of importance to decide the number of beams prorated to tracking, depending on a degree the trail of the detected object accords with the trail of moving body such as TBM to be tracked, a beam-partitioned-number computing unit 10 computing the beam number prorated to detecting and tracking, respectively, depending the level of importance, and a beam controller 9 controlling the beam partition to detecting and tracking depending on the partition number computed at the beam-partitioned-number computing unit 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radar apparatus that tracks a target detected by a fence beam using a tracking beam.

  As a conventional radar device, for example, there is one disclosed in Patent Document 1. In this radar device, the control of the search beam and the tracking beam is optimized by newly adding a beam management device that is configured by a phased array antenna system and calculates an optimal distribution value of the search time and the tracking time. . Patent Document 2 discloses a beam control apparatus that minimizes unnecessary irradiation of a verification beam with respect to a plurality of detection results and prevents deterioration in detection performance.

Japanese Patent Laid-Open No. 10-160832 Japanese Patent Laid-Open No. 10-300847

  The conventional radar apparatus represented by Patent Document 1 performs beam management for controlling the time for scanning the search beam in space and the time for tracking the searched target with the tracking beam. In other words, the beam management is to perform a search using a fence beam in which a plurality of search beams are connected like a fence, and to emit a tracking beam to the searched target, and only one of the search and tracking is performed. Was.

  Thus, in the conventional radar apparatus, there is no concept of simultaneous operation of search using a fence beam (hereinafter referred to as a fence search) and tracking using a tracking beam (hereinafter referred to as tracking as appropriate). While I was there, there was a problem that the detection function was obscured.

  In order to realize stable detection and tracking, it is not necessary to specialize in one of the operations, but flexible beam management according to the situation is required. For example, in order to improve the detection ability and tracking ability of a TBM (Theater Ballistic Missile) target, the importance of the target is accurately determined, and a beam distribution function corresponding to the situation is required. .

  The present invention has been made to solve the above-described problems. It is an object of the present invention to obtain a radar apparatus that improves the performance of both by performing detection and tracking simultaneously by beam distribution according to the importance of the target. Objective.

  The radar apparatus according to the present invention, an importance calculation unit for obtaining an importance for determining the number of beams to be allocated to tracking according to the degree to which the track of the detected target matches the track of the moving body to be tracked, A beam distribution number calculation unit that calculates the number of beams allocated to detection and tracking according to importance, and a beam control unit that controls beam allocation for detection and tracking according to the distribution number calculated by the beam distribution number calculation unit It is.

  According to the present invention, the importance calculation unit that calculates the importance for determining the number of beams to be allocated to the tracking according to the degree to which the track of the detected target matches the track of the moving body to be tracked, and the importance A beam distribution number calculation unit that calculates the number of beams allocated to detection and tracking according to the number of beams, and a beam control unit that controls beam allocation for detection and tracking according to the distribution number calculated by the beam distribution number calculation unit. It is possible to improve the performance of both by performing detection and tracking at the same time by beam distribution according to the degree of importance.

Embodiment 1 FIG.
The first embodiment includes an importance calculator that determines the importance (risk) of a target for performing fence search and tracking simultaneously by beam distribution.
FIG. 1 is a block diagram showing a configuration of a radar apparatus according to Embodiment 1 of the present invention. The radar apparatus according to the first embodiment includes a radar signal processing apparatus 1, an element antenna 2, a transmission / reception module 3, an excitation apparatus 4, and a reception apparatus 5. The radar signal processing device 1 includes a target detection device 6 and a data processing device, and includes a tracking method control unit 7, an importance calculator 8, a beam controller 9, and a beam distribution number calculator 10.

  A plurality of element antennas 2 for transmitting and receiving radio waves are arranged to constitute an array antenna. The transmission / reception module 3 amplifies radio waves radiated in or received from space, and controls the phase of the radio waves to form a transmission / reception beam having directivity in an arbitrary direction. The excitation device 4 supplies the transmission / reception module 3 with a phase control signal 20 that is a source of radio waves radiated into the space.

  The reception device 5 converts the reception signal 11 from the transmission / reception module 3 into a digital reception video signal. The target detection device 6 extracts target information from the received video signal output from the reception device 5, calculates the target position, and generates plot data 13. The tracking method control unit 7 outputs the target predicted speed, predicted position, and the like from the plot data 13 output from the target detection device 6 to the importance calculator 8 as wake data 14.

  The importance calculator 8 extracts information on the target speed, RCS (Radar Cross Section), and signal-to-noise (S / N) ratio from the track data output from the tracking method control unit 7. Based on the above, the presence or absence of the target importance is calculated. The beam control unit 9 generates beam control information 19 for controlling the beam directing direction. The beam distribution number calculator 10 determines the number of beams to be allocated to fence search and tracking.

  FIG. 2 is a diagram showing an example of beam management, and shows beam control information 19 output from the beam control unit 9 to the excitation device 4. One data rate of the beam control information 19 includes control data corresponding to 10 fence beams. In this beam control information 19, for example, when one target is detected, as shown in the lower part of the figure, five fence beams are assigned to the tracking beam for the target, and the remaining five are fences. Perform a search. The number of beams allocated to the tracking beam is determined according to the importance of the target. In the illustrated example, importance is high, and half of the total number of beams is assigned to tracking.

  In the example of FIG. 2, the maximum number of beams used for the tracking beam is 5, and half of the total capacity based on the total number of 10 beams is allocated. Thereby, for example, when the number of targets is two, two tracking beams are allocated per target, and the remaining six beams are used for the fence search. As described above, in the present invention, the maximum number to be assigned to the fence search function and the tracking function is determined from the total number of beams that can be transmitted and received, and the number of tracking beams is appropriately assigned according to the target number and its importance, and the fence search function and Perform tracking functions simultaneously.

Next, the operation will be described.
First, the transmission / reception module 3 controls the phase of the radio wave in accordance with the phase control signal 20 from the excitation device 4, and radiates radio waves having directivity in an arbitrary direction to the space as a fence beam or tracking beam via the element antenna 2. Receives and amplifies radio waves reflected by the target. The reception device 5 converts the reception signal 11 from the transmission / reception module 3 into a digital reception video signal and outputs it to the target detection device 6.

  In the target detection device 6, target information is extracted from the received video signal output from the reception device 5, and a detection plot, which is a calculation result of calculating the target position, is output to the tracking method control unit 7 as plot data 13. The tracking method control unit 7 outputs the plot data 13 output from the target detection device 6 to the importance calculator 8 as wake data 14 including the target speed and position.

FIG. 3 is a flowchart showing the operation of the radar apparatus according to the first embodiment, from the determination of beam distribution based on the importance of the target to execution of actual track processing.
In the importance calculator 8, when the wake data 14 is input from the tracking method control unit 7 (step ST1), the specification data defining the wake such as the result of the target detection by the fence beam or the position and speed of the tracking target by the tracking beam. (Step ST2).

  The basic operation mode of the radar signal processing apparatus 1 is a detection operation using a fence beam. When the target is detected by the fence beam, a part of the fence beam function is assigned to the tracking beam according to the importance of the target. For example, if the number of tracking beam distributions is increased for a highly important target, the beam area is increased, which is advantageous for obtaining highly accurate target information.

  In step ST2, the target currently being tracked by the tracking beam regardless of whether the content of the track data 14 is the result of detecting a new tracking target by the fence beam or the data defining the track of the tracking target by the tracking beam. The number is determined (step ST3). This is because the number of targets that can be tracked is limited, and when there are a plurality of tracking targets, the importance of the targets is ranked and the important targets are selected carefully.

Subsequently, the importance calculator 8 determines the importance using the track data 14 related to the tracking target (step ST4). Specifically, the importance is determined by the following two methods.
First, the importance calculator 8 is provided with a database in which the importance of an object corresponding to each of speed, flight pattern (in-band, out-band) and a combination thereof is registered. Therefore, if there is no target being tracked in step ST2 and only one new tracking target is detected, the importance calculator 8 obtains the target speed and flight pattern from the track data 14, and Compare the contents of the database to find the corresponding importance.

  In Step ST2, when it is determined that there are a plurality of targets to be tracked, such as when a new tracking target is already detected, the number of beams allocated to the tracking function is limited. Therefore, the number of beams to be allocated to the tracking of each target must be determined by comparing the importance levels between the targets while tracking. In this case, since the speeds and flight patterns of a plurality of tracking targets cannot be obtained simultaneously and compared simultaneously with the contents of the database, the importance cannot be determined by database comparison.

  Therefore, the importance calculator 8 comprehensively determines from the track data 14 based on the speed of each tracking target, the RCS (Radar Cross Section) and the S / N ratio, and determines the tracking target. Calculate the importance quantitatively. In the present invention, a target moving at high speed is detected, a minute target is detected by the RCS, and the importance is determined in consideration of the target detection environment based on the value of the S / N ratio. For example, TBM (Theater Ballistic Missile) and fighter aircraft have greatly different elevation velocities. In this case, if the purpose is to detect and track the TBM, the magnitude of the elevation angular velocity is determined as a factor for quantifying the importance, and it is important that the importance of the target having a large elevation angular velocity is increased. Determine the degree value. The TBM is separated into a warhead having a small RCS value and a booster having a large RCS value. Considering this case as well, the magnitude of the RCS value is determined as a factor for quantifying the importance, and the importance value is determined so that the importance of the target having a small RCS value is increased.

  Thus, when there are a plurality of tracking targets, the importance is calculated based on the information extracted from the track data that changes from moment to moment, so the importance for each target also changes with time. Thereby, the importance of each target can be ranked by comparing the importance of the targets, and an important target can be carefully selected. That is, it is possible to perform continuous tracking limited to important targets by distributing the number of tracking beams by ranking the importance levels. On the other hand, the importance changes with time, and the number of beam distributions also changes. As a result, when the importance of the target tracked so far decreases, the number of tracking beams to be distributed is decreased. On the other hand, if another target with higher importance appears, the tracking beam of the target with lower importance is allocated to the new target. When there is no target to be tracked, all beams are assigned to the fence search in order to maintain the detection ability.

  Note that the value of the S / N ratio is not an element for calculating the importance level alone, but is a determination element for determining the final number of tracking beams depending on the magnitude of the value. For example, if the S / N ratio is large, it is determined that it is not necessary to allocate a large number of tracking beams because the noise level is small and beam transmission / reception with the tracking target is performed well. If the S / N ratio is small, it is determined that beam transmission / reception is performed in a poor environment with a large noise level, and a large number of tracking beams are allocated for accurate tracking. In view of this tendency, in addition to the tracking target speed and RCS, the value of the S / N ratio is used for calculating the importance.

  The importance of the tracking target determined by the importance calculator 8 is output to the tracking method controller 7 as the importance calculation result 15. In the tracking method control unit 7, the importance calculation result 15 from the importance calculator 8 and the wake data 14 used for the determination are collected as data 16 and output to the beam control unit 9. The beam control unit 9 outputs the importance calculation result input from the tracking method control unit 7 to the beam distribution number calculator 10 as the importance calculation result 17.

The beam distribution number calculator 10 determines the number of beams allocated to fence search and tracking according to the importance of each tracking target defined in the importance calculation result 17 (step ST5). The number of allocated tracking beams depends on the target number to be tracked. That is, half of the maximum number of beams (radar possession capability) that can be handled by the radar apparatus must be used for the fence search beam, so the remaining half of the number of beams is allocated to tracking of the tracking target. For example, if the maximum number of beams is 10, half of the capacity must be allocated to the minimum fence search, and 5 are used for the fence search beam. As a result, the remaining five are used for the tracking beam. At this time, the following allocation patterns can be considered.
1. When the number of targets is one, all five tracking beams are allocated to one target, and the remaining five beams are allocated as a fence search beam.
2. When the number of targets is two, two tracking beams are allocated to each of the two targets, and the remaining six are allocated as fence search beams.
3. When the number of targets is three One tracking beam is allocated to each of the three targets, and the remaining seven are allocated as fence search beams.
4). When the number of targets is four One tracking beam is allocated to each of the four targets, and the remaining six are allocated as fence search beams.
5. When the number of targets is five, one tracking beam is allocated to each of the five targets, and the remaining five are allocated as fence search beams.
However, if a target exceeding the number of tracking beams allocated appears, and if the importance of the new tracking target is high, among the five targets that are the maximum number of tracking targets, the one with the highest priority ranking will be continued. Track and replace the lower ones.

  When the beam distribution number calculator 10 determines the number of beams to be allocated to fence search and tracking, it outputs the beam distribution number calculation result 18 to the beam controller 9. The beam control unit 9 generates the beam control information 19 as shown in FIG. 2 for controlling the beam pointing direction of the tracking beam and the fence search beam with respect to each tracking target according to the beam distribution number calculation result 18, and generates the excitation device 4. Output to. The excitation device 4 supplies a phase control signal 20 that is a source of radio waves radiated to space based on the beam control information 19 to the transmission / reception module 3.

  The transmission / reception module 3 amplifies radio waves radiated to or received from space in accordance with the phase control signal 20 and controls the phase of the radio waves to form a fence search beam and tracking beam having directivity in an arbitrary direction to form an element antenna 2 to send and receive. Thereby, actual track processing is executed (step ST6).

  As described above, according to the first embodiment, it is important to determine the number of beams allocated to tracking according to the degree to which the track of the detected target matches the track of a moving body such as a TBM to be tracked. An importance calculator 8 for determining the degree, a beam distribution number calculator 10 for calculating the number of beams respectively allocated to detection and tracking according to the importance, and a detection and tracking according to the distribution number calculated by the beam distribution number calculator 10 Since the beam control unit 9 that controls beam allocation is provided, the performance of both can be improved by performing detection and tracking simultaneously by beam distribution according to the importance of the target.

Embodiment 2. FIG.
FIG. 4 is a block diagram showing a configuration of a radar apparatus according to Embodiment 2 of the present invention. Components identical or equivalent to those of Embodiment 1 shown in FIG. is doing. The overlapping description is abbreviate | omitted about the component to which these same code | symbol was attached | subjected. The configuration newly added in the second embodiment is a classification processing device 23 that performs a classification process based on target speed information. When the importance calculator 8 calculates the importance, the classification processing device 23 gives the importance calculator 8 information for discriminating a target having a particularly high importance (risk).

Next, the operation will be described.
First, the transmission / reception module 3 controls the phase of the radio wave in accordance with the phase control signal 20 from the excitation device 4, and radiates radio waves having directivity in an arbitrary direction to the space as a fence beam or tracking beam via the element antenna 2. Receives and amplifies radio waves reflected by the target. The reception device 5 converts the reception signal 11 from the transmission / reception module 3 into a digital reception video signal and outputs it to the target detection device 6. In the target detection device 6, target information is extracted from the received video signal output from the reception device 5, and a detection plot, which is a calculation result of calculating the target position, is output to the tracking method control unit 7 as plot data 13. Up to this point, the process is the same as in the first embodiment.

  Thereafter, the tracking method control unit 7 uses the plot data 13 output from the target detection device 6 as classification process plot data, and summarizes the track data including the target speed and position obtained from the plot data 13. 21 is output to the classification processing device 23. The classification processing device 23 extracts tracking target speed information from the track data in the data 21, and determines whether or not a predetermined speed difference within a predetermined range has occurred in the tracking target.

  Some specific flying objects (moving objects) cause a characteristic speed change during the flight. The purpose of this embodiment is to quickly distinguish such flying objects. For this reason, a predetermined range including an error and the like for the speed difference due to the speed change of the flying object is determined and set in the classification processing device 23. An example of this specific flying object is TBM. In TBM, the warhead and booster are separated during flight, causing a characteristic speed change. In other words, the warhead maintains the high speed as it is, and the booster stalls and decreases in speed. This speed difference varies depending on the type of TBM, and can be specified for each type of TBM.

  Therefore, the classification processing device 23 extracts the speed information of the tracking target from the track data, and when a target with a high speed and a target with a low speed are generated from one tracking target, the speeds are compared and a predetermined value related to TBM is compared. If there is a speed difference in the range, these targets are determined to be TBM warheads and boosters. In this way, the classification processing device 23 discriminates that the tracking target is a specific flying object based only on the speed difference. Thereby, a specific flying object can be distinguished quickly. In this case, the classification processing device 23 generates a discrimination result 22 indicating that a high degree of importance is given to a target corresponding to a warhead with a high speed, and outputs the discrimination result 22 to the tracking method control unit 7.

  The tracking method control unit 7 outputs the wake data 14 including the discrimination result 22 from the classification processing device 23 to the importance calculator 8. The importance calculator 8 calculates the importance of the tracking target in consideration of the discrimination result 22. The subsequent processing is the same as in the first embodiment.

  As described above, according to the second embodiment, the classification processing device 23 is provided that discriminates that the tracking target is a specific flying object (moving body) from the speed difference generated in the tracking target. Can quickly discriminate the flying objects. For example, by identifying the warhead of the TBM target at an early stage and setting the importance of the beam distribution to be high, it is possible to accurately track the target having a high importance and anticipate further efficiency.

Embodiment 3 FIG.
FIG. 5 is a block diagram showing a configuration of a radar apparatus according to Embodiment 3 of the present invention. Components identical or equivalent to those of Embodiment 2 shown in FIG. is doing. The overlapping description is abbreviate | omitted about the component to which these same code | symbol was attached | subjected. The configuration newly added in the third embodiment is an RCS analyzer 24 that performs classification processing based on target RCS (radar reflection cross section) information. The RCS analyzer 24 gives the importance calculator 8 information for discriminating a target having a particularly high importance (risk level) together with the classification processing device 23 when the importance calculator 8 calculates the importance.

Next, the operation will be described.
First, the transmission / reception module 3 controls the phase of the radio wave in accordance with the phase control signal 20 from the excitation device 4, and radiates radio waves having directivity in an arbitrary direction to the space as a fence beam or tracking beam via the element antenna 2. Receives and amplifies radio waves reflected by the target. The reception device 5 converts the reception signal 11 from the transmission / reception module 3 into a digital reception video signal and outputs it to the target detection device 6. In the target detection device 6, target information is extracted from the received video signal output from the reception device 5, and a detection plot, which is a calculation result of calculating the target position, is output to the tracking method control unit 7 as plot data 13. Up to this point, the process is the same as in the first embodiment.

  Thereafter, the tracking method control unit 7 uses the plot data 13 output from the target detection device 6 as classification process plot data, and summarizes the track data including the target speed and position obtained from the plot data 13. 21 is output to the classification processing device 23. The classification processing device 23 outputs the data 21 to the RCS analyzer 24 before executing the discrimination processing similar to that in the second embodiment. The RCS analyzer 24 extracts tracking target RCS (radar reflection cross section) information from the track data in the data 21, and determines whether the RCS value is within a predetermined range set in advance.

  Some specific flying objects (moving bodies) change their form during flight and cause characteristic RCS value changes. The purpose of this embodiment is to quickly distinguish such flying objects. For this reason, the RCS value of such a flying object is determined in a predetermined range including an error and set in the RCS analyzer 24. An example of this specific flying object is TBM. The TBM undergoes a characteristic morphological change in which the warhead and booster are separated during flight. At this time, the RCS value of the warhead is small, and the booster equipped with the fuel maintains a large RCS value. This RCS value differs depending on the type of TBM, and can be specified for each type of TBM.

  Therefore, the RCS analyzer 24 extracts the tracking target position information and RCS value from the track data, and when a target having a large RCS value and a small target are generated from one tracking target, the RCS values are compared. If the target located in the forward direction is an RCS value within a predetermined range, it is determined that these targets are the TBM warhead and booster. Thus, the RCS analyzer 24 discriminates that the tracking target is a specific flying object from the RCS value. Thereby, a specific flying object can be distinguished quickly. In this case, the RCS analyzer 24 generates a discrimination result 22 indicating that a target corresponding to a warhead having a small RCS value is given high importance, and outputs the discrimination result 22 to the tracking method control unit 7.

  The tracking method control unit 7 outputs the wake data 14 including the discrimination result 22 from the RCS analyzer 24 and the classification processing device 23 to the importance calculator 8. The importance calculator 8 calculates the importance of the tracking target in consideration of the discrimination result 22 from the RCS analyzer 24 in addition to the discrimination result 22 from the classification processing device 23. This is because the RCS value changes depending on the positional relationship (observation accuracy) between the target and the observation position, and thus it is difficult to immediately determine the magnitude of the RCS. That is, the discrimination result obtained by the RCS analyzer 24 is used in a form that complements the discrimination result obtained by the classification processing device 23. The subsequent processing is the same as in the first embodiment.

  As described above, according to the third embodiment, the RCS analyzer 24 that discriminates that the tracking target is a specific flying object (moving body) from the tracking target RCS is provided. Can be distinguished quickly. For example, by identifying the warhead of the TBM target at an early stage and setting the importance of the beam distribution to be high, it is possible to accurately track the target having a high importance and anticipate further efficiency.

  In the third embodiment, a configuration in which the classification processing device 23 and the RCS analyzer 24 are used together is shown, but a configuration in which only the RCS analyzer 24 is mounted may be used. In this case, as described above, it is difficult to specify the magnitude relationship of the RCS value based on the positional relationship between the target and the observation position. However, it is possible to statistically determine the magnitude relationship by continuing to observe the RCS value for a certain period of time. Therefore, in the case of a configuration in which only the RCS analyzer 24 is mounted, for example, the RCS value is obtained by the processing as described above, and the discrimination processing is performed.

Embodiment 4 FIG.
FIG. 6 is a block diagram showing the configuration of a radar apparatus according to Embodiment 4 of the present invention. Components identical or equivalent to those of Embodiment 1 shown in FIG. is doing. The overlapping description is abbreviate | omitted about the component to which these same code | symbol was attached | subjected. The newly added configuration in the fourth embodiment is a coordinate calculator 25 and a coordinate information database 26. The coordinate calculator 25 predicts the arrival point of a specific flying object (moving body) from the target elevation angle and azimuth vector information. For example, the TBM landing point is predicted. The coordinate information database 26 is a database in which position information regarding a specific point is stored in association with importance (risk). For example, the location information of an important base in the country can be considered.

Next, the operation will be described.
First, the transmission / reception module 3 controls the phase of the radio wave in accordance with the phase control signal 20 from the excitation device 4, and radiates radio waves having directivity in an arbitrary direction to the space as a fence beam or tracking beam via the element antenna 2. Receives and amplifies radio waves reflected by the target. The reception device 5 converts the reception signal 11 from the transmission / reception module 3 into a digital reception video signal and outputs it to the target detection device 6. In the target detection device 6, target information is extracted from the received video signal output from the reception device 5, and a detection plot, which is a calculation result of calculating the target position, is output to the tracking method control unit 7 as plot data 13. Up to this point, the process is the same as in the first embodiment.

  Thereafter, the tracking method control unit 7 uses the plot data 13 output from the target detection device 6 as classification process plot data, and summarizes the track data including the target speed and position obtained from the plot data 13. 21 is output to the coordinate calculator 25. The coordinate calculator 25 holds its own coordinate information acquired by the radar, extracts the elevation angle and azimuth vector information of the tracking target from the track data in the data 21, and uses these information to determine the tracking target. Calculate the coordinate information of the predicted arrival point.

  The coordinate calculator 25 collates the calculated coordinate information 27a of the predicted arrival point with the position information in the coordinate information database 26, and reads out the importance associated with the matching point and the position information as the collation result 27b. This information is output as a discrimination result 22 to the tracking method control unit 7. The tracking method control unit 7 outputs the wake data 14 including the discrimination result 22 from the coordinate calculator 25 to the importance calculator 8. The importance calculator 8 assigns the importance associated with the specific point to the tracking target expected to arrive at the specific point included in the discrimination result 22 from the coordinate calculator 25.

  For example, consider a case where the tracking target is TBM, and the coordinate information database 26 stores position information of important bases in the country in association with importance. In this case, the importance associated with the position information of the base is given to the tracking target predicted to land on the important base as a result of the collation, as the importance of the tracking target.

  As described above, according to the fourth embodiment, the coordinate calculator 25 that calculates the predicted arrival point of the tracking target, and the coordinates that store the degree of importance in association with the position information of the specific point such as the important base in the country. An information database 26, collating the content of the predicted arrival point obtained by the coordinate calculator 25 with the content of the coordinate information database 26, and assigning the importance of the point obtained as a comparison result to the tracking target; The importance of tracking can be determined from the expected landing point of the tracking target.

  In the fourth embodiment, the coordinate calculator 25 and the coordinate information database 26 are applied to the configuration of the first embodiment. However, in addition to the configurations of the second and third embodiments, the coordinate calculator 25 and the coordinate information database 26 are applied. It does not matter even if it is an aspect.

Embodiment 5. FIG.
FIG. 7 is a block diagram showing a configuration of a radar apparatus according to Embodiment 5 of the present invention. Components identical or equivalent to those of Embodiment 1 shown in FIG. is doing. The overlapping description is abbreviate | omitted about the component to which these same code | symbol was attached | subjected. A configuration newly added in the fifth embodiment is a fence beam controller 29 for operating the beam management of the fence search beam.

  The fence beam controller 29 can focus the fence search function on a specific target when the beam control unit 9 does not generate a control signal related to the tracking beam and determines that there is no tracking target. . Specifically, a fence beam control signal 30 for controlling the fence width of the fence beam is generated and output to the beam control unit 9. The beam control unit 9 controls the excitation device 4 by generating beam control information 19 having a fence width according to the fence beam control signal 30. Thereby, desired fence beam management can be realized.

  For example, when there is a missile launch base that needs to be monitored with changes in the situation with neighboring countries, the fence width (detection distance) is increased by narrowing the fence width of the fence beam. It is also possible to focus on monitoring long-distance bases.

  As described above, according to the fifth embodiment, since the fence beam controller 29 for operating the beam management of the fence search beam is provided, a desired fence beam management can be realized.

  In the fifth embodiment, the example in which the fence beam controller 29 is added to the configuration of the first embodiment has been described. However, any one of the configurations from the second embodiment to the fourth embodiment described above or these You may apply to the structure which combined these structures.

Embodiment 6 FIG.
FIG. 8 is a block diagram showing a configuration of a radar apparatus according to Embodiment 6 of the present invention. Components identical or equivalent to those of Embodiment 5 shown in FIG. is doing. The overlapping description is abbreviate | omitted about the component to which these same code | symbol was attached | subjected. Newly added configurations in the sixth embodiment are a beam thickness controller 31 and a search data control unit 32. The beam thickness controller 31 gives a control signal for manipulating the thickness of the fence beam to the fence beam controller 29 to control the thickness of the fence beam. The search data control unit 32 has a database that stores information relating to speed, direction, and S / N ratio relating to a specific flying object (moving body) in association with importance, and detects from the track data 14 obtained by the fence search. Information on the target speed, direction, and S / N ratio is collected and collated with the contents of the database to determine the necessity of tracking.

  For example, a detection target such as TBM flies across a fence beam formed by connecting a plurality of beams. In addition, the time for which the detection target such as TBM is located in the fence beam depends on the speed of the detection target and the thickness of the fence beam, and the detection target is within the fence beam by shortening the time of one scan of the fence search. Multiple observations will be possible before passing.

  Therefore, when the control signal related to the tracking beam is not generated by the beam control unit 9 and it is determined that there is no tracking target, the beam thickness controller 31 according to the present embodiment sends a fence beam layer to the fence beam controller 29. Is given to increase the time for the detection target to be positioned in the fence beam, and the number of fence search scans is increased. As a result, more target information can be acquired in the search beam, and early detection of important targets can be realized.

  Further, while the fence search is being executed, the search data control unit 32 acquires the wake data 14 from the tracking method control unit 7 and collects the speed, direction, and S / N information of the detection target obtained in the fence search. To do. At this time, the information on the speed and direction related to a specific flying object provided in itself and the information on the S / N ratio are collated with the contents of the database stored in association with the importance. If the search data control unit 32 determines that the target is a high importance target such as TBM based on the collation result, it outputs the importance read from the database to the tracking method control unit 7 as the target importance calculation result 15. .

  The tracking method control unit 7 outputs wake data 14 including the importance calculation result 15 from the search data control unit 32 to the importance calculator 8. The importance calculator 8 determines the importance of the detection target according to the importance calculation result 15 from the search data control unit 32. The subsequent operation is the same as that in the first embodiment.

  On the other hand, if the collation result does not match any information other than the highly important flying object stored in the database, the search data control unit 32 has a low importance of tracking. And the low importance level is output to the tracking system control unit 7 as the importance level calculation result 15 so as not to allocate the tracking beam. Thereby, a tracking beam is not allocated to the detection target.

  As described above, according to the sixth embodiment, by providing the beam thickness controller 31 for manipulating the thickness of the fence beam, more target information can be acquired in the search beam, and as a result, important target Early detection can be realized. In addition, the search data control unit 32 that determines whether or not the detected target needs to be tracked is provided, so that the target with high importance can be accurately tracked and the deterioration of the fence search function caused by the combined use with tracking is suppressed. can do.

  In the sixth embodiment, the example in which the beam thickness controller 31 and the search data control unit 32 are added to the configuration of the first embodiment has been described. The present invention may be applied to any configuration from the second embodiment to the fifth embodiment or a configuration combining these configurations.

It is a block diagram which shows the structure of the radar apparatus by Embodiment 1 of this invention. It is a figure which shows an example of beam management. 3 is a flowchart showing the operation of the radar apparatus according to the first embodiment. It is a block diagram which shows the structure of the radar apparatus by Embodiment 2 of this invention. It is a block diagram which shows the structure of the radar apparatus by Embodiment 3 of this invention. It is a block diagram which shows the structure of the radar apparatus by Embodiment 4 of this invention. It is a block diagram which shows the structure of the radar apparatus by Embodiment 5 of this invention. It is a block diagram which shows the structure of the radar apparatus by Embodiment 6 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Radar signal processing apparatus, 2 element antenna, 3 transmission / reception module, 4 excitation apparatus, 5 receiving apparatus, 6 target detection apparatus, 7 tracking system control part, 8 importance calculator, 9 beam control part, 10 beam distribution number calculator , 11 received signal, 12 received video signal, 13 plot data, 14 track data, 15, 17 importance calculation result, 16 data, 18 beam distribution number calculation result, 19 beam control information, 20 phase control signal, 21 data, 22 Discrimination result, 23 classification processing device, 24 RCS analyzer, 25 coordinate calculator, 26 coordinate information database, 27a coordinate information of expected arrival point, 27b collation result, 29 fence beam controller, 30 fence beam control signal, 31 beam thickness Controller, 32 Search data control unit.

Claims (7)

An importance calculation unit that calculates importance for determining the number of beams to be allocated to tracking according to the degree to which the track of the detected target matches the track of the moving body to be tracked;
A beam distribution number calculation unit for calculating the number of beams respectively allocated to detection and tracking according to the importance,
A radar apparatus comprising: a beam control unit that controls beam allocation for detection and tracking according to the distribution number calculated by the beam distribution number calculation unit.   2. The radar apparatus according to claim 1, further comprising a classification processing unit that classifies whether or not the mobile body is to be tracked based on a speed difference generated in the detected target.   The radar apparatus according to claim 1, further comprising an RCS analysis unit that classifies whether or not the mobile body is to be tracked based on the detected target RCS value. Using the coordinate information database that stores the position information of a specific point in association with the degree of importance and the information about the track of the detected target, the coordinates of the predicted arrival point of the target are calculated, and the calculation result and the coordinate information database A coordinate calculation unit that collates with the contents of
The importance calculation unit assigns, to the target, an importance associated with a point that matches the position information of the coordinate information database as a collation result by the coordinate calculation unit. The radar device according to any one of the above.   The radar apparatus according to any one of claims 1 to 4, further comprising a fence beam control unit that controls a fence width of the fence beam.   The radar apparatus according to any one of claims 1 to 5, further comprising a beam thickness control unit that controls a thickness of the fence beam layer.   The radar apparatus according to any one of claims 1 to 6, further comprising a search data control unit that determines whether tracking is necessary based on information about a track of a detected target. .

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