CN101419280B - Radar data fan number accounting and monitoring method - Google Patents

Radar data fan number accounting and monitoring method Download PDF

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Publication number
CN101419280B
CN101419280B CN 200810235715 CN200810235715A CN101419280B CN 101419280 B CN101419280 B CN 101419280B CN 200810235715 CN200810235715 CN 200810235715 CN 200810235715 A CN200810235715 A CN 200810235715A CN 101419280 B CN101419280 B CN 101419280B
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fan
frame
information
radar
array
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CN101419280A (en
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王匀
丁一波
杨恺
祁伟
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Nanjing LES Information Technology Co. Ltd
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Nanjing LES Information Technology Co. Ltd
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Abstract

The invention discloses a method for monitoring radar data fan number statistics. The method comprises the following steps: initializing; acquiring standard period and standard fan number of radar to be detected and defining array; reading a port; returning to radar data frame and CRC verified results at the same time; adding time stamp information to the radar data frame; analyzing the radar data frame and acquiring fan number value; judging whether the data frame contains fan number information; under the condition that the data frame fan number value is smaller than a former fan number value, arranging the frame as an initial frame; updating the array of fan number information and setting an array element corresponding to the fan number as 1; examining time difference value Td between the initial frame from the time and the initial from last time; clearing array statistic data; examining the array recording the fan number information; and outputting alarm information and fan number of the lost fan and returning to the step of clearing array statistic data. The method can ensure precision of output result of the system.

Description

Radar data fan number accounting and monitoring method
Technical field
The present invention relates to belong to Air Traffic Control Automation System radar data processing technology field, specially refer to that drawing of air traffic control radar information connects and a kind of radar data fan number accounting and monitoring method of radar data quality dynamic monitoring.
Background technology
Radar data is the main information source of Air Traffic Control Automation System, by drawing of multi-section radar data connect and handles, the empty mood gesture that forms control zone shows, the controller just can grasp the dynamic and flight parameter of flight of every batch of aircraft in the spatial domain on the control seat of system, by ground-air communication equipment, implement air traffic control and coordinative command.
Radar equipment is owing to technical system difference, production firm's difference, the radar formula is various, therefore the radar information that connects being drawn by every portion must just can enter air traffic control automation system (ATC system) and participate in Data Fusion through communications test, message format authentication.Simultaneously, in the radar operational process, need to monitor the radar data quality in real time, judge whether the target data of its tracking is accurate, continuous, quick, guarantee air traffic control automation system correctness and reliability.
At present, the user of civil aviaton of army draws in the process that connects in radar information, usually use special-purpose communication control procedure analyser and check the status transmission of Frame, and the communication control procedure analyser can only carry out simple test to communications by the communication protocol of setting, comprise channel bit error rate test and and the error checking and correction (CRC) of message, can't analyze for the information format and the quality of radar data.Common protocol analyzer can't detect the situation of admission control in the Transmission System of Radar Data process at receiving end.
With ATC system handles single channel radar data is example, after frame data are whenever received by system usually, therefrom extracts the flight path data and export its positional information immediately on display interface.If radar data is not lost in transmission course or made mistakes, then on the ATC system display interface, each cycle of radar track information (being generally 4 seconds), update displayed once.If during the radar data LOF is arranged, then one-period is postponed in the renewal of the flight path information that comprises of this Frame.For the aircraft of high-speed cruising, be example with speed per hour 800km/h, can move about 222 meters p.s..Each radar period (to be 4 seconds example), about 900 meters of displacement is if Data Update is interrupted 1 cycle, when after 8 seconds once more more during new target location, target has moved about 2 kms, and then the position of the target seen on display screen of ATC system user has very large deviation with actual conditions.Therefore, the loss situation of monitoring radar data frame, the reliability of the ATC system being understood radar is very important.
Summary of the invention
Goal of the invention: the present invention is directed to the deficiencies in the prior art, a kind of radar data fan number accounting and monitoring method is provided.
Technical scheme: the invention provides a kind of radar data fan number accounting and monitoring method, this method may further comprise the steps:
(1) initialization physical port;
(2) obtain the normal period and the standard fan number of radar to be detected by configuration file, and define the array ArrSec[that is used to write down fan information];
(3) read physical port;
(4) api function that reads of port also returns the CRC check result when returning the radar data frame, if the result be very, then carries out next step, otherwise returns step (3).Cyclic check code (CRC sign indicating number): be a kind of error check code the most frequently used in the data communication field, it is characterized in that the length of information field and check field can be selected arbitrarily.
A root that sends Frame calculates the CRC string according to the data text and it is attached to after the text;
After the take over party receives Frame, also calculate CRC string according to text, and compare with the CRC string of transmit leg, if 2 CRC strings are identical, then check results is TRUE, otherwise is FALSE.If CRC string is failure relatively, illustrate that Frame makes mistakes in transmission course.
The generation and checking of CRC string all is to be finished by the intelligent chip of communication card, the direct return results of api function (TRUE/FALSE).
(5) add timestamp information for the radar data frame;
(6) the radar data frame is resolved,, then obtain fan number value (sn_new) simultaneously if Frame comprises fan information;
(7) whether the judgment data frame contains fan information, is then to carry out next step, otherwise returns step (3);
(8) if Frame is fanned number value (sn_new) less than last fan number value (sn_save, initial value is-1), mean that new one-period begins, this frame is set to start frame, upgrade static variable sn_save and skip to step (10), otherwise upgrade static variable sn_save and carry out next step; Because No. 0 fan or positive north fan all might be lost, therefore can not judge the initial of each cycle according to certain specific fan information in transmission course.Here the determination methods of Cai Yonging is the fan number value of more adjacent 2 fan information, and when one-period did not also finish, fan number value increased progressively, otherwise, if fan number value then means the beginning in new cycle less than previous fan number value.
(9) the array ArrSec[of new record fan information more], will put 1 with number corresponding array element of this fan, and return step (3);
(10) check the time difference Td of this start frame and a last start frame, whether judgement time difference Td is greater than 1.5 times of standard radar period T c or less than 0.5 times of standard radar cycle, if the result is for being then to be judged to be unusually, outputting alarm information, and carry out next step, if the result is otherwise skips to step (12);
(11) remove the statistics of array and return step (9);
(12) the array ArrSec[of inspection record fan information], judged whether that fan number loses, if the result for otherwise skip to step (11), otherwise carry out next step;
(13) outputting alarm information and lose the fan number of fan and return step (11).
Beneficial effect: the situation that the present invention number loses by real-time monitoring radar data fan, continue to lose fan number if find certain road radar, represent that then this radar also continues the lose objects data simultaneously.The second-rate of this road radar can be thought by the ATC system, with portion's radar shielding, or reduces its weighted value when the multipath radar fusion treatment, thereby reduces the influence of ropy radar to final output result, safeguards system output result's accuracy.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is done further and to specify.
Be illustrated as the process flow diagram of radar data fan number accounting and monitoring method of the present invention.
Embodiment
As shown in the figure, the invention describes a kind of radar data fan number accounting and monitoring method, this method may further comprise the steps:
Step 1, the initialization physical port;
Step 2 is obtained the normal period and the standard fan number of radar to be detected by configuration file, and defines the array ArrSec[that is used to write down fan information];
Step 3 reads physical port;
The api function that step 4, port read also returns the CRC check result when returning the radar data frame, if the result is then to carry out next step, otherwise return step 3;
Step 5 is added timestamp information for the radar data frame;
Step 6 pair radar data frame is resolved, if Frame comprises fan information, then obtains fan number value simultaneously;
Whether step 7 judgment data frame contains fan information, is then to carry out next step, otherwise returns step 3;
Step 8 is if Frame is fanned number value less than last fan number value, and this frame is set to start frame, upgrades static variable sn_save, and skips to step (10), otherwise upgrade static variable sn_save, and carry out next step;
Step 9 is the array ArrSec[of new record fan information more], will put 1 with number corresponding array element of this fan, and return step 3;
Step 10 is checked the time difference Td of this start frame and a last start frame, whether judgement time difference Td is greater than 1.5 times of standard radar period T c or less than 0.5 times of standard radar cycle, if the result is for being then to be judged to be unusually, outputting alarm information, and carry out next step, if the result is otherwise skips to step 12;
Step 11 is removed the statistics of array and is returned step 9;
The array ArrSec[of step 12 inspection record fan information], judged whether that fan number loses, if the result for otherwise skip to step 11, otherwise carry out next step;
Step 13 outputting alarm information and lose the fan number of fan and return step 11.
More particularly, step of the present invention is as follows:
The initialization physical port obtains the normal period and the standard fan number of radar to be detected and initialization data structure by configuration file.The array ArrSec record fan information that contains the individual element in 16 (or 32) by definition.
Program reads physical port immediately, and the api function that port reads also returns the CRC check result when returning the radar data frame, abandon invalid Frame.Add timestamp information to Frame.
The radar data frame is resolved, obtain data frame type,, obtain its fan number value simultaneously for the Frame that contains fan information.
If Frame fan number value is greater than last fan number value, the array of new record fan information more then will put 1 with number corresponding array element of this fan, represent that this cycle has received this fan corresponding data frame.
If Frame fan number value means that less than last fan number value new one-period begins, this Frame then is the start frame in new cycle.At first check the time difference Td of this start frame and a last start frame.If Td is greater than 1.5 times of standard radar period T c, or less than 0.5 times of standard radar cycle, then be judged to be unusual, and outputting alarm information.
As Td during in normal range, check array ArrSec, if find to have fan number to lose, then outputting alarm information and which fan number are lost.Remove array ArrSec subsequently, and write down the timestamp information of this start frame.
With the data instance of table 1 actual reception, manage process in the open below:
Table 1:
The Crc sign Frame type or the fan number Timestamp Text (only listing preceding 8 bytes) Array ArrSec state
Good Positive northern frame 14:31:18.828 36?ff?93?48?3c?03?01?0a
Good 0 14:31:19.000 37?ff?93?48?00?00?01?58 1000000000000000
Good 1 14:31:19.109 37?ff?93?48?6d?00?01?04 1100000000000000
Good 2 14:31:19.531 37?ff?93?48?13?02?01?74 1110000000000000
Good 4 14:31:20.046 38?ff?93?48?2e?00?01?e4 1110100000000000
Good Frame 14:31:20.062 38?ff?93?48?3e?00?01?04 1110100000000000
Good 5 14:31:20.187 38?ff?93?48?bb?00?01?70 1110110000000000
Good 6 14:31:20.500 38?ff?93?48?f4?01?01?ac 1110111000000000
Good 7 14:31:20.703 38?ff?93?48?bf?02?01?8c 1110111100000000
Good 8 14:31:20.875 38?ff?93?48?6b?03?01?3c 1110111110000000
Good 9 14:31:21.062 39?ff?93?48?3e?00?01?20 1110111111000000
Connect table 1
Good 10 14:31:21.359 39?ff?93?48?67?01?01?20 1110111111100000
Good 11 14:31:21.703 39?ff?93?48?bf?02?01?c8 1110111111110000
Good 12 14:31:21.906 39?ff?93?48?8a?03?01?74 1110111111111000
Good Frame 14:31:22.062 3a?ff?93?48?3e?00?01?aa 1110111111111000
Good Frame 14:31:22.234 3a?ff?93?48?ea?00?01?aa 1110111111111000
Good Frame 14:31:22.406 3a?ff?93?48?96?01?01?aa 1110111111111000
Good Frame 14:31:22.453 3a?ff?93?48?c5?01?01?22 1110111111111000
Good 14 14:31:22.578 3a?ff?93?48?42?02?01?58 1110111111111010
Good 15 14:31:22.734 3a?ff?93?48?de?02?01?ac 1110111111111011
Good Positive northern frame 14:31:22.750 3a?ff?93?48?ee?02?01?0a 1110111111111011
Good 0 14:31:22.828 3a?ff?93?48?3c?03?01?58 1000000000000000
After initialization was finished, instant read data frame according to the CRC sign, to the valid data frame, was added timestamp, parse for frame form (obtain frame type or fan number), and the Frame result is as above shown listed.
When first cycle of beginning, array ArrSec[] be cleared, first element is put 1.Then, when receiving the Frame that contains fan information, all can upgrade array ArrSec[].
When receiving second No. 0 when fan, because 0＜15, therefore be judged to be another cycle to begin.At this moment, check earlier array ArrSec[] state, the value of finding the 4th and the 14th element is 0, then represents in this cycle the admission control of fan number 3 and 13 correspondences.Behind the output result, empty array ArrSec[], and first element put 1, begin the data statistics of following one-period.
Time difference of (start frame) between adjacent 2 No. 0 fans
Td＝(14:31:22.828-14:31:19.000)＝3.828。
Usually, radar is 16 or 32 fans with a scan period mean allocation, exports the fan number of its correspondence in output flight path data.The flight path data itself are not easy to judge whether to take place to lose, but fan information is continuous, and have sequence number, therefore by adding up weekly phase fan information, can find the radar track loss of data indirectly.
The invention provides a kind of thinking of radar data fan number accounting and monitoring method; the method and the approach of this technical scheme of specific implementation are a lot; the above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.The all available prior art of each component part not clear and definite in the present embodiment is realized.

Claims (2)

1. a radar data fan number accounting and monitoring method is characterized in that, this method may further comprise the steps:
(1) initialization physical port;
(2) obtain the normal period and the standard fan number of radar to be detected by configuration file, and define the array that is used to write down fan information;
(3) read physical port;
(4) api function that reads of port also returns the CRC check result when returning the radar data frame, if the result be very, then carries out next step, otherwise returns step (3);
(5) add timestamp information for the radar data frame;
(6) the radar data frame is resolved,, then obtain fan number value simultaneously if Frame comprises fan information;
(7) whether the judgment data frame contains fan information, is then to carry out next step, otherwise returns step (3);
(8) if Frame is fanned number value less than last fan number value, this frame is set to start frame, upgrades static variable, and skips to step (10), otherwise upgrade static variable, and carry out next step;
(9) array of new record fan information more will be put 1 with number corresponding array element of this fan, and be returned step (3);
(10) check the time difference Td of this start frame and a last start frame, whether judgement time difference Td is greater than 1.5 times of standard radar period T c or less than 0.5 times of standard radar cycle, if the result is for being then to be judged to be unusually, outputting alarm information, and carry out next step, if the result is otherwise skips to step (12);
(11) remove the statistics of array and return step (9);
(12) array of inspection record fan information has judged whether that fan number loses, if the result for otherwise skip to step (11), otherwise carry out next step;
(13) outputting alarm information and lose the fan number of fan and return step (11).
2. a kind of radar data fan number accounting and monitoring method according to claim 1 is characterized in that, the value of the last fan information of handling of static variable storage is changed to-1 in the step (8) when initialization.
CN 200810235715 2008-12-04 2008-12-04 Radar data fan number accounting and monitoring method Active CN101419280B (en)

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CN103235289B (en) * 2013-04-19 2015-02-04 武汉滨湖电子有限责任公司 Radar double-gate two-step branch prediction flight path tracking method
CN104331279B (en) * 2014-10-21 2017-06-30 上海微小卫星工程中心 Method and device for processing condition statistic type requirements in satellite-borne software
CN105187209B (en) * 2015-07-21 2018-07-13 中国航天科工集团第三研究院第八三五七研究所 A kind of method of ethernet communication safeguard protection

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