JP2001338400A - Flight track distribution system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flight track distribution system which sets the priority reference among flight track data, selects the flight track data on the airplane to be controlled to distribute them with priority, extracts the flight track data necessary for display to decrease the quantity of data and to distribute them, displaying the non-priority flight track data after extending their extrapolation intervals for preventing omission of the flight track data. SOLUTION: This flight track distribution system comprises a flight track selection means 110 which adds the priority to flight track data, a flight track transfer means 120 which transfers the flight track data, a flight track data extraction means 210 which extracts the flight track data necessary for updating display, a flight track transmission means 220 which transmits the priority flight track data and non-priority flight track data after discriminating them from each other, a flight track reception means 310 which receives both priority and non-priority flight track data, a flight track position extrapolation means 320 which performs extrapolation correction for flight track positions of both priority and non-priority flight track data and a flight track display updating means 330 which outputs and displays both priority and non-priority flight track data undergone the extrapolation correction on a display device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the distribution of wake data of an aircraft obtained at a radar site in a traffic control facility, and more particularly, to the case where a wake data transmission overflow occurs due to a restriction on the communication capacity of a communication line. The present invention relates to a track distribution system that selects and distributes a priority track, distributes shortened track data obtained by extracting data necessary for display update, or extends and corrects a track position correction interval.

[0002]

2. Description of the Related Art Track data obtained at a radar site is:
It is transmitted to a remote control facility, passes through a processing unit in the facility,
It is displayed on the wake display device and used for aircraft control. In such a conventional wake distribution system, when the number of wake data becomes large and the communication capacity overflows, there arises a problem that the wake data cannot be distributed within a certain period. The problem of this overflow is that, even if a large amount of wake data is generated in a fixed period, the time required to distribute all wake data is reduced due to the restriction of the capacity of the communication line that distributes the wake data. This causes a situation in which the time for updating the display on the display device is not kept within a certain period, and the situation is lost.

[0003] Therefore, the communication load is reduced by selecting the track data on a priority basis and distributing the data by priority, or extracting the data necessary for updating the track data and shortening the track data to be transferred. However, there is a problem that the track data that is not distributed is not displayed and output. Furthermore, the track position of the track data that is not distributed
Even if the extrapolation interval is extended and corrected, the actual track position cannot be tracked correctly, and a problem arises in which an inappropriate track position far from the actual track position is displayed.

[0004]

When controlling an aircraft, the target aircraft is limited. By selecting such an aircraft, the wake data of the aircraft is preferentially distributed, and the acquisition of the wake data within a certain period is ensured. Or,
With respect to the track displayed on the track display device, data required for display update is extracted and the track data is shortened, thereby reducing the restriction on the communication capacity. With these measures, extrapolation processing can be performed while maintaining the accuracy of the wake position, and a decrease in tracking position accuracy can be prevented. In addition, for non-priority track data that is out of the priority standard and is not distributed, the track position of previously obtained track data that is retained is displayed with the extrapolation interval extended and displayed, so that track data is not dropped. Can be displayed.

[0005] It is an object of the present invention to set a priority standard for wake data, select wake data of an aircraft to be controlled and distribute it preferentially, extract wake data required for display, and distribute it with a reduced data amount. In other words, the non-priority track data is displayed by extending the extrapolation interval to prevent dropping of the track data.

[0006]

SUMMARY OF THE INVENTION Therefore, according to the present invention,
In a track distribution system for detecting a track of an aircraft and tracking data obtained by tracking and identifying the track to a track display device in a control facility through a communication line at regular intervals, the track data is analyzed, and Means for assigning a priority to track data corresponding to the priority criteria, and preferentially distributing the assigned priority track data within a fixed cycle, and assigning a priority to the remaining time within the fixed cycle. Means for distributing non-priority track data, means for generating shortened track data by extracting data necessary for display update from the priority and non-priority track data, acquisition timing and display output of the priority track data The wake position is extrapolated by the time difference of the timing to correct the position, and the wake data that is not distributed due to overflow of the communication line capacity within the fixed period is retained. Based on the track data, and having means for position correction by stretching the distance between the extrapolation correction, means for displaying the output in a constant cycle the track data position correction on the track display device.

Further, the wake data includes a type indicating the affiliation of the wake, position coordinates indicating the wake position of the wake, a speed indicating the speed at which the wake moves, and a course (azimuth) indicating the direction in which the wake moves. And at least an altitude at which the wake moves, and a time stamp indicating the wake data acquisition timing or the display update timing.

Further, the priority criterion is a criterion consisting of a type indicating the affiliation of a wake, an airspace in which the wake moves, an altitude at which the wake moves, and an acceleration obtained by analyzing wake data of the wake. Is set by selecting one or a plurality.

[0009] Further, the track distribution system selects track data obtained by tracking and identifying the track of the aircraft according to a specified priority criterion, and adds track priority to the track data. Track data transfer means for transferring the data required for display update from the track data, track data extracting means for generating shortened track data obtained by extracting the data required for display update, priority track data with priority, and priority. No priority track data is sorted out, priority track data is transmitted preferentially within a certain period, non-priority track data is delivered in the remaining time within a certain period, and the remaining time overflows and cannot be delivered. Track transmitting means for discarding non-priority track data; track receiving means for receiving the priority track data and non-priority track data; and Wake position extrapolation means for extrapolating and correcting the wake position due to the time difference between the time stamp and the display timing, and wake display update means for displaying and outputting the priority track data and the non-priority wake data corrected for the wake position to a display device. , Is provided.

Further, the track selection means has selection condition setting means for inputting the priority criterion.

Further, the wake position extrapolating means may include: for wake data that cannot be received within the remaining time of the fixed period,
The position is corrected by extending the extrapolation interval based on the track data already received and held.

[0012]

Embodiments of the present invention will be described with reference to the drawings. Referring to FIG. 1, an embodiment of a track distribution system includes a track generator 10 for obtaining a track data obtained by tracking and identifying a radar signal at a radar site (not shown) in a series of track data processing, And a track display device 30 that distributes the position of the distributed track data in accordance with the display timing and displays the corrected position. The track generation device 10 includes a track generation unit 100, and includes a track selection unit 110 and a track transfer unit 120.
The track distribution device 20 includes a track distribution unit 200, and includes a track information extraction unit 210 and a track transmission unit 220.
The wake display device 30 includes wake display means 300 and includes wake receiving means 310, wake extrapolation means 320, and wake display update means 330.

Referring to FIG. 4, which illustrates track data,
The track data includes a priority 400 indicating that the track has been selected based on the priority criteria, a type 401 indicating the affiliation of the track, a position coordinate 402 indicating the track position of the track, and a speed 403 indicating the speed at which the track moves. It includes at least a course (direction) 404 indicating the direction in which the track moves, and a time stamp 405 indicating acquisition timing or display update timing of the track data.

Each of these means functions roughly as follows. Track generation means 100 of track generation device 10
Receives track data obtained by tracking and identifying a track obtained from the radar site within a predetermined period, and sends the track data to the track selection means 110. The track selection unit 110 assigns a priority to the track data based on the content of the track data and sends the data to the track transfer unit 120. The track transfer means 120 distributes the priority track data having a high priority to the track distribution means 200 within a predetermined period. In addition, non-priority track data to which no priority is assigned is distributed in the remaining time within a certain period. Track distribution means 2 receiving priority and non-priority track data
The wake information extraction means 210 of 00 extracts data required for display update from the wake data and notifies the wake transmission means 220 of a shortened wake data distribution request. The track transmission unit 220 transmits the track data to the track display unit 300 of the track display device in the facility via the communication network.
The track receiving means 310 in the track display means 300 of the track display device sends the received track data to the track extrapolating means 320. The wake extrapolation means 320 detects the timing 4 of the display update.
In accordance with 06, wake data corrected for the wake position is notified to the wake display updating means 330. Wake receiving means 3
10 sends the held previous track data to the track extrapolating means 320 even for the track not received. The trajectory extrapolation means 320 calculates the position 402 and the speed 40 in the wake data.
3, the time stamp 405 and the display update timing 4
In accordance with 06, the position of the wake is corrected by extrapolation calculation and returned to the wake receiving means 310. In addition, the wake extrapolation means 320
For the track data that was not received, its position 402 and speed 4 based on the previous track data that it holds.
03, the extrapolation interval is extended and extrapolation calculation is performed in accordance with the display update timing 406, the position of the wake is corrected, and the result is returned to the wake receiving means 310. The track display updating means 330
At the display update timing 405, the track whose position has been corrected by the extrapolation calculation is output to the display device.

Next, the operation of this embodiment will be described with reference to the drawings. With reference to FIG.
Referring to FIG. 2 showing the operation of the wake generating device 1,
The wake generating means 100 of 0 has a constant period (for example, every 6 seconds)
Next, a plurality of (for example, 1000) track data is generated (step A1 in FIG. 2). The track selection means 110 analyzes the track data from the generated track data and assigns priorities based on track priority criteria (step A2). Based on the priority 400, the order of the track data to be transmitted to the track distribution device 20 is determined (step A3), and identification of high priority is given to the track data as priority track data (step A3).
4) and store it in the internal storage (step A6), store it as non-priority track data to which high priority identification is not given (step A5), and store it in the internal storage (step A6).

Track transfer means 120 of track generator 10
Operates at regular intervals, and refers to the track data stored in the internal memory by the track selecting means 110 to select the priority track data stored as a high priority (step A).
7), priority track data is extracted from the internal storage (step A8), packed in a message buffer (hereinafter referred to as "packing") (step A9), and transferred to the track distribution device 20 (step A10). When the transmission of the priority track data is completed, the track generation means 10 selects the non-priority track data from the internal storage within the remaining time within a certain cycle (step A11), and packs the non-priority track data into a message. (Step A9), and transfer to the track distribution device 20 (Step A10).

Track distribution means 200 of track distribution device 20
Receives the wake data (step A1 in FIG. 3A).
1) The wake information extracting means extracts the data of the wake data required for updating the display on the wake display device 30 such as the position and speed (step A12). The track data shortened by the extracted data is stored in the track display device 30.
Packing is performed on the message to send the message to the server (step A13), and packing is performed until the message reaches the sending size or the sending time reaches a certain period. Thereby, the communication line load on the wake display device 30 is reduced. Thereafter, when the state that satisfies the transmission condition is reached (step A14), the transmission is performed to the wake display device 30 (step A15).

In the track display device 30, the track transfer device 20
The shortened track data is received by the track receiving unit of the track display unit 300 (step A1 in FIG. 3B).
6). The received wake data is subjected to position correction by extrapolating the wake based on the wake position 402, the speed 403, and the time difference from the time stamp 405 to the display update timing 406 (step A17). In addition, the wake display device 30
Of the wake data stored in the wake data, the wake data not received from the wake distribution device 20 is extended at a predetermined interval and extrapolated to correct the position of the wake position 402 (step A19). The wake data subjected to the position correction is stored in an internal memory (step A18), and when the display update timing 406 is reached, the wake display update means 33.
In accordance with 0, an output is made to the display of the wake display device 30 (step A20).

Next, the operation of this embodiment will be described using a specific example. 4 and 5 showing a process in which specific track data 410 to 440 are processed by the track distribution system.
It will be described with reference to FIG. The wake data shown in FIG. 4 and FIG.
The priority 400 includes the priority determined by the priority standard and the type 401
Is the belonging division obtained by identifying the aircraft, and the position coordinates 40
2 indicates airspace coordinates represented by XY, speed 403 indicates the moving speed of the aircraft, track 404 indicates the azimuth indicating the moving direction of the aircraft, and time stamp 405 indicates the time when the wake is obtained by wake generator 10. At least a time stamp.

As shown in FIG. 4, it is assumed that four track data 410 to 440 have been generated by the track generator 100 (step A1). These track data 410
Through 440, by the track selection means 110, for example,
A priority is determined based on the speed as a priority criterion, and an identification of priority transmission or normal non-priority transmission is given and stored in the internal storage (steps A2 to A5). The track transfer means 120 refers to this internal storage at regular intervals,
The priority track data is extracted and transmitted to the track distribution device 20 (step A8). In addition, after the non-priority track data is extracted from the internal storage within the fixed period and the remaining processing time required for transmitting the priority track data, the track distribution device 2
0 is repeatedly transmitted (step A).
9). In the track distribution device 20, the track data extraction means 21
0, a type 401, a position 402, and a speed 403 necessary for display update are extracted from the track data, and a first message collecting priority track data and a second message collecting non-priority track data are obtained within a predetermined period. All are classified (step A12) and transmitted to the wake display device 30 (step A15).

In the wake display device 30, wake extrapolation means 32
0, the display update timing 406 and the time stamp 40 at which the track data was obtained.
5, the position is corrected by extrapolating the track based on the time difference between the track data and the track-corrected track data 443, 43 in the storage medium.
3, 453, 413 are stored in the internal storage (step A17 in FIG. 5). The wake extrapolation means 320 extends the extrapolation interval of the non-priority wake data not received from the wake distribution device 20 within a certain period, and corrects the position of the wake data 4.
63, 423, 473 are stored in the internal storage (step A19). These wake data 443, 433, 45
3,413,463,423,473 are coordinate positions 40
2, the wake is corrected in position according to the display update timing T10, and wake data corrected in position according to the display update timing is output to the display of the wake display device 30 by referring to the internal storage by the wake display update means 330. (Step A20).

Next, another embodiment of the present invention will be described with reference to the drawings. Referring to FIG. 6, this embodiment is different from the embodiment shown in FIG. 1 in that a selection condition setting means 130 is added to the wake generating means 100 of the wake generating apparatus 10. The selection condition setting means 130 sets conditions for determining the priority for the track selection means 110. In this embodiment, as the track selection condition, the type of the track data, the airspace, the altitude, and the like can be set as a composite condition, and the track selection means 110 can be given a priority standard.

The operation of another embodiment will be described with reference to the drawings. Steps B1, B3 to B6 in FIG. 7, the track transfer means 120 shown in FIG. 6, each means in the track distribution apparatus 120, and each means in the track generation apparatus 30 are the same as those in the embodiment shown in FIG. Since the operation is the same as that of each means, the description is omitted. The track selection means 110 shown in FIG. 1 determines the selection of track data according to priority criteria. In this embodiment, the conditions of the priority criteria are selected and set by selecting data items of the track data, and the set contents are obtained from the input means (step B7), and the obtained conditions are used as the priority criteria (step B7). Step B2).

Next, another embodiment will be described with a concrete example. When the wake data generated in FIG. 8 is obtained from the input means as a selection condition of “speed 100 or more and type 4 or more is the priority criterion”, this condition is set to the first key speed 100 or more and the second key The type is 4 or more, and the priority of the wake data is determined using this as a priority criterion (step B7 in FIG. 8). If the speeds of the wakes are the same,
It is determined that the track data that satisfies the condition “type 4 or more” set by the second key is given priority, and a priority of 400 is assigned to the track data (step B2). In this other embodiment, since the priority standard can be set via the input means, the track to be controlled can be directly selected on the track display device 30, and the track under geographical conditions can be selected. It is possible to preferentially select wake data according to the operation purpose of the wake display device, such as preferential selection of information and preferential selection in altitude conditions.

[0025]

The first effect is that priority track data is preferentially distributed within a certain period even if the communication line capacity between the track generator and the track distributor is limited. The position correction by extrapolation of the track does not lower the tracking accuracy of the track.

The second effect is that, for track data that is not distributed due to overflow of the communication line capacity, the position is corrected by extending the extrapolation interval using the previous track data held by the track display device. Since it is displayed, the wake data is not dropped from the display. A third effect is that data necessary for display update is extracted from the wake data to be shortened wake data, so that the load on the communication line can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the wake generator of FIG. 1;

FIG. 3A is a flowchart showing the operation of a track distribution device for distributing track data, and FIG. 3B is a flowchart showing the operation of a track display device.

FIG. 4 is a diagram illustrating an operation of the embodiment.

FIG. 5 is a diagram illustrating an operation of this embodiment.

FIG. 6 is a diagram showing a configuration of another embodiment of the present invention.

FIG. 7 is a flowchart showing an operation of another embodiment.

FIG. 8 is a diagram illustrating an operation of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Track generation apparatus 20 Track distribution apparatus 30 Track display apparatus 100 Track generation means 110 Track selection means 120 Track transmission means 130 Selection condition setting means 200 Track distribution means 210 Track data extraction means 220 Track transmission means 300 Track display means 310 Track reception means 320 Wake extrapolation means 330 Wake display update means 400 Priority 401 Type 402 Position coordinates 403 Speed 404 Course (azimuth) 405 Time stamp 406 Altitude

Continued on front page F-term (reference) 2F029 AA05 AC08 2F073 AA40 AB02 CC01 DD02 DE01 DE03 EF05 GG01 GG08 5H180 AA26 BB15 CC14 DD02 FF22 FF32 5J070 AC01 AC03 AC06 AE04 AK22 BG30

Claims (6)

[Claims] 1. A wake distribution system for detecting a wake of an aircraft and distributing wake data obtained by tracking and identifying the wake to a wake display device in a control facility at regular intervals via a communication line, Means for assigning a priority to the track data corresponding to a predetermined priority criterion, and distributing the priority track data with the priority with priority within a certain period, and giving priority to the remaining time within the certain period. Means for distributing non-priority track data not assigned a degree, means for generating shortened track data by extracting data necessary for display update from the priority and non-priority track data, and The wake position is extrapolated by the time difference between the acquisition timing and the display output timing, and the position is corrected. Means for extending the interval of the extrapolation correction based on the held track data to correct the position, and means for displaying and outputting the position-corrected track data to the track display device at regular intervals. A wake distribution system characterized by the following. 2. The wake data includes a type indicating the affiliation of a wake, position coordinates indicating a wake position of the wake, a speed indicating a speed at which the wake moves, and a course (azimuth) indicating an azimuth in which the wake moves. The wake distribution system according to claim 1, further comprising: at least one of: an altitude at which the wake moves, and a time stamp indicating a wake data acquisition timing or a display update timing. 3. The priority criterion is a criterion consisting of a type indicating a wake's affiliation, an airspace in which the wake moves, an altitude at which the wake moves, and an acceleration obtained by analyzing wake data of the wake. 2. The wake distribution system according to claim 1, wherein one or a plurality of wakes are selected and set. 4. The track distribution system, comprising: track selection means for selecting track data obtained by tracking and identifying the track of an aircraft according to a specified priority criterion, and adding a priority to the track data; Track data transfer means for transferring the data required for display update from the track data, and track data extraction means for generating shortened track data by extracting the data required for display update from the track data; priority track data with priority; and priority data. No priority track data is sorted out, priority track data is transmitted preferentially within a certain period, non-priority track data is delivered in the remaining time within a certain period, and the remaining time overflows and cannot be delivered. Track transmitting means for discarding non-priority track data; track receiving means for receiving the priority track data and non-priority track data; Track position extrapolation means for extrapolating and correcting the track position based on the time difference between the time stamp and the display timing, and track display updating means for displaying and outputting the priority track data and the non-priority track data with the track position corrected to a display device. The wake distribution system according to claim 1, comprising: 5. The track selection means according to claim 4, wherein said track selection means includes selection condition setting means for inputting said priority criterion. 6. The wake position extrapolation means, for wake data that cannot be received within the remaining time of the predetermined period, extends the extrapolation interval and corrects the position based on wake data already received and held. The wake position extrapolating means according to claim 4, characterized in that: