CN105810022A - Airport scene monitoring radar video data processing method - Google Patents

Airport scene monitoring radar video data processing method Download PDF

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CN105810022A
CN105810022A CN201610209816.4A CN201610209816A CN105810022A CN 105810022 A CN105810022 A CN 105810022A CN 201610209816 A CN201610209816 A CN 201610209816A CN 105810022 A CN105810022 A CN 105810022A
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video
radar
prison
field
scene surveillance
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CN105810022B (en
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常存喜
朱盼
王国强
陈通
罗晓艳
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Second Research Institute of CAAC
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
    • G08G5/0073—Surveillance aids
    • G08G5/0082—Surveillance aids for monitoring traffic from a ground station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

The invention relates to an airport scene monitoring radar video data processing method.The method includes the steps that initial preservation data information of a scene monitoring radar server and a scene monitoring radar display terminal is set; the scene monitoring radar server parses original video data of a scene monitoring radar, scene monitoring radar parsing video data are obtained, and the scene monitoring radar parsing video data comprise a plurality of scene monitoring video parsing units; the scene monitoring radar server compares the scene monitoring radar parsing video data with the initial preservation data information, obtains new scene monitoring radar parsing video data and sends the data to the scene monitoring radar display terminal, and the scene monitoring radar display terminal receives and displays video information of the new scene monitoring radar parsing video data.According to the airport scene monitoring radar video data processing method, changeable radar video data are sent, the received and sent scene monitoring radar video data size is reduced, occupation of network bandwidth, the scene monitoring radar display terminal and internal storage resources is lowered, and response to incremental deployment of the scene monitoring radar display terminal can be made rapidly.

Description

A kind of airport surface detection radar video data handling procedure
Technical field
The invention belongs to surveillance technology field, surface area, be specifically related to a kind of airport surface detection radar video data handling procedure.
Background technology
Scene surveillance radar early stage is generally used for the various ships at sea, and main purpose is to monitor the activity of ship, especially under complicated weather conditions (such as foggy weather).Later along with the development of scene surveillance radar technology, the application of scene surveillance radar is constantly promoted.Nearest 20 years along with the development of Global Aviation Industry, the scale of airline goes from strength to strength, cause that in airport, takeoff and landing number of times is greatly increased, how in limited space, under weather condition complicated and changeable, the good increasing aircraft of management and corresponding produce pass through increasing logistics support vehicle on runway, taxiway, become the problem that airport authorities of various countries must take into, utilize scene surveillance radar auxiliary controller to carry out ground traffic control and be increasingly becoming a kind of trend of airport development.Scene surveillance radar (SMR) is consistent with the ICAO function for monitoring defined about " advanced land operations guides and controls system (A-SMGCS) " and realizes system, is specifically designed to the radar system monitored with tracing machine Ground target.
Scene surveillance radar video is the primary signal display at airdrome scene of scene surveillance radar, and owing to scene surveillance radar is towards whole airdrome scene, therefore scene surveillance radar video comprises very many information.Therefore, the data volume of scene surveillance radar video is very big, brings very big burden for airport network.
At present, scene surveillance radar video shows, distributes data mainly through scene surveillance radar, then passes through some simple data filterings, and data process, and obtain scene surveillance radar video data, are subsequently sent to video data terminal and show.In a lot of situations, the data major part that same sector scanning is distributed by scene surveillance radar is identical, but according to existing method, identical data to be constantly distributed to display terminal, therefore, the meaningless of a large amount of network bandwidth is caused to take, and the taking of the CPU of display terminal and memory source.
Summary of the invention
The purpose of the present invention is to be solved technical problem is that minimizing scene surveillance radar video processing data traffic volume, there is provided one to reduce the network bandwidth to take, the CPU and the memory source that reduce scene surveillance radar display terminal take, and the airport surface detection radar video data handling procedure of the incremental deploying of real-time response scene surveillance radar display terminal.
For reaching described purpose, the present invention provides a kind of airport surface detection radar video data handling procedure, and the method technical scheme includes:
Step S1: what arrange scene surveillance radar service end and scene surveillance radar display terminal initially preserves data message；
Step S2: the original video data of scene surveillance radar is resolved by scene surveillance radar service end, it is thus achieved that field prison radar resolves video data, described field prison radar resolves video data and includes multiple prison video parsing unit；
Step S3: field is supervised radar and resolved after video data compares with initial preservation data message by scene surveillance radar service end, obtaining new field prison radar resolve video data and be sent to scene surveillance radar display terminal, scene surveillance radar display terminal receives and shows that new field prison radar resolves the video information of video data.
Compared with prior art, the invention have the advantages that
1. by supervising the history video data of radar parsing video data and preservation than competiting place, obtain the radar video data value of change, only send the radar video data of change, therefore greatly reduce field prison radar video data traffic volume, reduce the network bandwidth and take.
2. existing universal method compared by scene surveillance radar display terminal, and the radar video data of reception greatly reduce, and the CPU and the memory source that therefore reduce scene surveillance radar display terminal take.
3. by the monitor in real time of scene surveillance radar service end, it is possible to communication session set up by scene surveillance radar display terminal that is real-time and that be newly added such that it is able to quickly respond the incremental deploying of scene surveillance radar display terminal.
Accompanying drawing explanation
Fig. 1 is the flow chart of the airport surface detection radar video data handling procedure of the present invention；
Fig. 2 is the flow chart that scene surveillance radar service end of the present invention is connected with scene surveillance radar display terminal；
Fig. 3 is an airport electronic chart；
Fig. 4 is the flow chart that the present invention arranges that user-defined field monitors the effective coverage set of frequency；
Fig. 5 is the flow chart that the present invention obtains described field prison radar parsing video data；
Fig. 6 is that the present invention shows that field prison radar resolves the flow chart of video data；
Fig. 7 is the scene surveillance radar video figure that an airport shows；
Fig. 8 is scene surveillance radar service end of the present invention monitoring flow chart.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below to be embodied as and the invention will be further described in conjunction with accompanying drawing.
Referring to Fig. 1 flow chart illustrating a kind of airport surface detection radar video data handling procedure of the present invention, the method includes:
Step S1: what arrange scene surveillance radar service end and scene surveillance radar display terminal initially preserves data message；
Step S2: scene surveillance radar service end receives from the original video data message of scene surveillance radar and resolves, it is thus achieved that field prison radar resolves video data, described field prison radar resolves video data and includes multiple prison video parsing unit；Wait and set up with all scene surveillance radar display terminals being connected simultaneously communication session, and set up and update scene surveillance radar display terminal list；
Step S3: multiple prison video parsing unit are done after comparing in real time by scene surveillance radar service end with initial preservation data message, obtain new field prison radar and resolve video data, and it being sent to scene surveillance radar display terminal, scene surveillance radar display terminal receives and shows that new field prison radar resolves the video information of video data.
The initial step preserving data message arranging described scene surveillance radar service end described in step S1 includes: after scene surveillance radar service end starts, set up a two dimensional field prison video intensity memory space, and the field prison radar video intensity level V that two dimensional field is supervised each node unit of video intensity memory space is initialized as 0.The described initial step preserving data message arranging described scene surveillance radar display terminal includes: after scene surveillance radar display terminal starts, set up a two dimensional field prison video intensity memory space, and the field prison radar video intensity level V that two dimensional field is supervised video intensity each node unit of memory space is initialized as 0, and according to every radar ATTRIBUTE INDEX, it is respectively provided with four rectangular coordinate values of each node unit.Described two dimensional field prison video intensity memory space is H*K two dimensional field prison video intensity memory space, and H therein is the video sectors index range value of field prison video parsing unit, and the video sectors that K is field prison video parsing unit radially indexes value range.
Referring to Fig. 2 flow chart illustrating that scene surveillance radar service end is connected with scene surveillance radar display terminal, step S1 also includes scene surveillance radar service end and scene surveillance radar display terminal Connection Step:
Step S11a: scene surveillance radar service end sets up communication session with all scene surveillance radar display terminals being connected, and sets up and update scene surveillance radar display terminal list；
Step S12a: refer to Fig. 3 and illustrate certain airport electronic chart, scene surveillance radar display terminal loads airport electronic chart, the display various key element of airdrome scene, including lawn, runway, taxiway and various Aerodrome Construction, scene surveillance radar display terminal sends connection request to service end and sets up communication session simultaneously, after setting up session, received field prison radar resolves video data.
Refer to Fig. 4 and illustrate that arranging user-defined field monitors the effective coverage set U of frequencyeffectFlow chart, what arrange described scene surveillance radar service end initially preserves data message, also includes arranging user-defined field and monitors the effective coverage set U of frequencyeffectStep as follows:
Step S11b: field being supervised radar parsing video data video sectors index H value range in an angular direction and is divided into equal portions, each equal portions are the video sectors that scene surveillance radar service end sends；
Step S12b: in each video sectors, the resolution according to radar, to supervise the attribute information of radar according to field, video sectors radially index value range K is divided into equal portions, each equal portions radially are the field prison video parsing unit of this video sectors；
Step S13b: according to user-defined airdrome scene region, namely described airdrome scene region is the effective coverage set U that field monitors frequencyeffectIts definition is as follows: described field monitors that the effective coverage set of frequency includes the set of all user-defined effective video sectors, and all fields prison video parsing unit of this effective video sector definition, the effective video sector index H' of this prison video parsing unit is defined as 0≤H' < H, and effective video sector radially index K' is defined as 0≤K' < K, it is possible to the configuration of these effective video sets of sectors is placed in data base or text；H is video sectors index range value, and the video sectors that K is field prison video parsing unit radially indexes value range.
Scene surveillance radar constantly sends initial data message, packet parsing is field prison video parsing unit by scene surveillance radar service end, described field prison radar resolves video data and includes multiple prison video parsing unit, each prison video parsing unit U is defined as video sectors index H ', video sectors radially indexes K ' and a field prison radar video intensity level V, V represents the reflection of radar wave intensity of multiple prison video parsing unit, and this value is for calculating the field prison terminal video intensity show value R of scene surveillance radar display terminal.
Video parsing unit is supervised in field for scene surveillance radar display terminal, except comprising video sectors index H ', video sectors radially indexes K ', outside the prison radar video intensity level V of field, also comprise four rectangular coordinate values, form a convex quadrangle, this tetragon four summit rectangular coordinates respectively the first coordinate (x1,y1), the second coordinate (x2,y2), the 3rd coordinate (x3,y3), 4-coordinate (x4,y4)。
Additionally need the ATTRIBUTE INDEX supervising radar according to field, and according to the sector index H' of field prison video parsing unit, 0≤H' < H and sector radially index K', 0≤K' < K, calculating four summit rectangular coordinate values of tetragon of field prison video parsing unit, its computing formula (1), (2), (3), (4) are as follows:
&theta; 1 = H , * 2 * &pi; &divide; H &rho; 1 = K , * T r a d i u s &divide; K x 1 = &rho; 1 * cos&theta; 1 + x 0 y 1 = &rho; 1 * sin&theta; 1 + y 0 - - - ( 1 )
&theta; 2 = ( H , + 1 ) * 2 * &pi; &divide; H &rho; 2 = K , * T r a d i u s &divide; K x 2 = &rho; 2 * cos&theta; 2 + x 0 y 2 = &rho; 2 * sin&theta; 2 + y 0 - - - ( 2 )
&theta; 3 = H , * 2 * &pi; &divide; H &rho; 3 = ( K , + 1 ) * T r a d i u s &divide; K x 3 = &rho; 3 * cos&theta; 3 + x 0 y 3 = &rho; 3 * sin&theta; 3 + y 0 - - - ( 3 )
&theta; 4 = ( H , + 1 ) * 2 * &pi; &divide; H &rho; 4 = ( K , + 1 ) * T r a d i u s &divide; K x 4 = &rho; 4 * cos&theta; 4 + x 0 y 4 = &rho; 4 * sin&theta; 4 + y 0 - - - ( 4 )
Shown in formula 1-4: TradiusFor the radial direction maximum detectable range of scene surveillance radar, x0For the benchmark abscissa of scene surveillance radar, y0For the benchmark vertical coordinate of scene surveillance radar, π is pi value, and cos is cosine function, and sin is SIN function；θ1The polar coordinate polar angle value of the first coordinate of the tetragon of video parsing unit, ρ is supervised for field1Footpath, the polar coordinate pole value of the first coordinate of the tetragon of video parsing unit is supervised for field；θ2The polar coordinate polar angle value of the second coordinate of the tetragon of video parsing unit, ρ is supervised for field2Footpath, the polar coordinate pole value of the second coordinate of the tetragon of video parsing unit is supervised for field；θ3The polar coordinate polar angle value of the 3rd coordinate of the tetragon of video parsing unit, ρ is supervised for field3Footpath, the polar coordinate pole value of the 3rd coordinate of the tetragon of video parsing unit is supervised for field；θ4The polar coordinate polar angle value of the 4-coordinate of the tetragon of video parsing unit, ρ is supervised for field4Footpath, the polar coordinate pole value of the 4-coordinate of the tetragon of video parsing unit is supervised for field.
The field prison terminal video intensity show value R of scene surveillance radar display terminal is the intensity level that scene surveillance radar display terminal shows at screen, and it is calculated by equation below (5):
R = R r a n g e * V V r a n g e - - - ( 5 )
Shown in formula 5, RrangeSupervise the color depth value range of terminal video intensity show value for field, V is field prison radar video intensity level, VrangeRadar video intensity value range value is supervised for field.
The continuous received field prison radar initial data message of scene surveillance radar service end, then resolves to field prison video parsing unit.
The two dimensional field prison video intensity memory space node unit of scene surveillance radar display terminal also includes four rectangular coordinate values, then according to formula (1), (2), (3), (4) calculating four rectangular coordinate values respectively, it is as follows that two dimensional field prison video intensity memory space is defined as formula (6):
Aserver=H*K
Aclient=H*K (6)
During formula 6 illustrates: AserverTwo dimensional field for scene surveillance radar service end supervises video intensity memory space, AclientH*K two dimensional field for scene surveillance radar display terminal supervises video intensity memory space.
Refer to Fig. 5 and illustrate that obtaining described field prison radar resolves the flow chart of video data, it is thus achieved that described field prison radar resolves the step of video data and includes:
Step S21: scene surveillance radar service end receives original video data message, and resolve to multiple prison video parsing unit, calculate the video sectors index H ' of each the prison video parsing unit obtained after resolving simultaneously, and video sectors radially indexes K ' and field prison radar video intensity V-value；
Step S22: detect described field prison radar video intensity V-value more than 0, then perform step S23, if detecting described field prison radar video intensity V-value to be not more than 0, then gives up this video data.
Step S23: detect described sector and monitor the effective coverage U of frequency in user-defined fieldeffectIn, if in this region, then continue going down and perform step S24, detect described sector and do not monitor set U in frequency effective coverage in user-defined fieldeffectIn, then give up this video data.
Step S24: whether the field prison radar video intensity V' value that the two dimensional field prison video intensity memory space place effective video sector index H ' of detection scene surveillance radar service end and described video sectors radially index K ' position is equal with the field prison radar video intensity V-value resolved, if it is unequal, the field prison radar video intensity V-value then resolved is replaced described two dimensional field prison common sector, video intensity memory space place index and is radially indexed the field prison radar video intensity level V' of position with sector, if equal, gives up this data.
Refer to Fig. 6 and illustrate that display field prison radar resolves the flow chart of video data, described in step S3, show that the step of field prison radar parsing video data includes:
After step S31: multiple prison video parsing unit have compared, multiple resolved prison video parsing unit are packaged as new field prison radar and resolve video data, and be sent to scene surveillance radar display terminal.
All scene surveillance radar display terminals receive prison radar of showing up and resolve after video data, corresponding two dimensional field are supervised video sectors, video intensity memory space place index H ', video sectors radially indexes that the field prison radar video intensity level of K ' position is updated in protocol package video sectors index H ', video sectors radially indexes the reception value of K ' position.
Step S32: scene surveillance radar display terminal resolves described field prison radar and resolves video data, and supervise radar parsing video data renewal two dimensional field prison video intensity memory space according to described field, scene surveillance radar display terminal constantly travels through the non-zero value of the field prison radar video intensity level searched in two dimensional field prison video intensity memory space, field prison terminal video intensity show value R is calculated by formula (5), by four rectangular coordinate values, field is supervised video data simultaneously and is shown in scene surveillance radar terminal.Referring to the region C shown in Fig. 7 is field prison video display area, and C7, C8, CC, C3, C2, CB are the taxiway title on certain airport.
Except main flow, present invention additionally comprises a monitoring flow process, monitor the addition of new scene surveillance radar display terminal, and the exiting of some scene surveillance radar display terminals.Referring to Fig. 8 scene surveillance radar service end being shown as in present invention monitoring flow chart, described scene surveillance radar service end monitoring flow process is as follows:
Step S11b1: scene surveillance radar service end is set up network service and intercepted end, and set up a scene surveillance radar display terminal list, the node of each list of each scene surveillance radar display terminal list each unit of list (node refer to) includes a scene surveillance radar display terminal IP value；
Step S11b2: monitor new scene surveillance radar display terminal and scene surveillance radar service end and set up and communicate, then the IP address of increase scene surveillance radar display terminal is to scene surveillance radar display terminal list；If having scene surveillance radar display terminal to set up with service end to communicate, then scene surveillance radar service end increases a node unit, and the IP address value of this scene surveillance radar display terminal is arranged on this node unit；
Step S11b3: for the scene surveillance radar display terminal newly increased, scene surveillance radar service end travels through described two dimensional field prison video intensity memory space AserverIn each node field prison video parsing unit, and send non-zero field therein prison radar video intensity level to the scene surveillance radar display terminal being newly added；If the field prison radar video intensity level V having node unit is non-zero value, then video parsing unit is supervised in multiple non-zero value fields, it is packaged as field prison radar and resolves video data, sending field prison radar cell protocol package to the scene surveillance radar display terminal being newly added, scene surveillance radar display terminal supervises radar video intensity level according to step S32 more new field；
Step S11b4: scene surveillance radar service end is constantly intercepted and judged whether the communication connection of scene surveillance radar display terminal is interrupted, if interrupted, is deleted by this scene surveillance radar display terminal attribute node from scene surveillance radar display terminal list.
The above, the present embodiment is only the illustration that the present invention is made.Being not limited to the substantial technological context of the present invention, any people being familiar with this technology is in the technical scope that disclosed herein, it will be appreciated that the conversion expected or replacement, all should be encompassed in comprising within scope of the present invention.

Claims (10)

1. an airport surface detection radar video data handling procedure, it is characterised in that the method includes:
Step S1: what arrange scene surveillance radar service end and scene surveillance radar display terminal initially preserves data message；
Step S2: the original video data of scene surveillance radar is resolved by scene surveillance radar service end, it is thus achieved that field prison radar resolves video data, described field prison radar resolves video data and includes multiple prison video parsing unit；
Step S3: field is supervised radar and resolved after video data compares with initial preservation data message by scene surveillance radar service end, obtaining new field prison radar resolve video data and be sent to scene surveillance radar display terminal, scene surveillance radar display terminal receives and shows that new field prison radar resolves the video information of video data.
2. method as claimed in claim 1, it is characterized in that, step S1 arranges the initial step preserving data message of described scene surveillance radar service end and includes: set up a two dimensional field prison video intensity memory space, and the field prison radar video intensity level that described two dimensional field is supervised each node unit in video intensity memory space initializes.
3. method as claimed in claim 1, it is characterized in that, step S1 arranges the initial step preserving data message of described scene surveillance radar display terminal and includes: set up a two dimensional field prison video intensity memory space, and the field prison radar video intensity level that described two dimensional field is supervised each node unit in video intensity memory space initializes, and according to every radar ATTRIBUTE INDEX, it is respectively provided with four rectangular coordinate values of each space nodes unit.
4. method as claimed in claim 2 or claim 3, it is characterised in that described two dimensional field prison video intensity memory space is H*K two dimensional field prison video intensity memory space, and H therein is video sectors index range value, K is that video sectors radially indexes value range.
5. the method for claim 1, it is characterised in that step S1 also includes scene surveillance radar service end and scene surveillance radar display terminal Connection Step:
Step S11a: scene surveillance radar service end sets up communication session with all scene surveillance radar display terminals being connected, and sets up and update scene surveillance radar display terminal list；
Step S12a: scene surveillance radar display terminal loads airport electronic chart, scene surveillance radar display terminal sends connection request to scene surveillance radar service end and sets up communication session simultaneously.
6. the method for claim 1, it is characterised in that what arrange described scene surveillance radar service end initially preserves data message, the step also including arranging the effective coverage set of user-defined field supervision frequency is as follows:
Step S11b: field being supervised radar parsing video data video sectors index range value in an angular direction and is divided into equal portions, each equal portions are the video sectors that scene surveillance radar service end sends；
Step S12b: supervise the attribute information of radar according to field, is divided into equal portions by video sectors radially index value range, and each equal portions radially are the field prison video parsing unit of described video sectors；
Step S13b: according to user-defined airdrome scene region, namely described airdrome scene region is the effective coverage set that field monitors frequency, described field monitors that the effective coverage set of frequency includes all user-defined effective video sectors, and all fields prison video parsing unit of this effective video sector definition, described effective video sector index H' is 0≤H' < H, described video sectors radial direction index K' is 0≤K' < K, H is video sectors index range value, and K is that video sectors radially indexes value range.
7. the method for claim 1, it is characterized in that, described field prison radar resolves video data and includes multiple prison video parsing unit, and each prison video parsing unit includes video sectors index, video sectors radial cable is regarded it as and a field prison radar video intensity level.
8. the method for claim 1, it is characterised in that the step obtaining described field prison radar parsing video data includes:
Step S21: obtain the field prison effective video sector index of video parsing unit, video sectors radially index and field prison radar video intensity level；
Step S22: detect described field prison radar video intensity level more than 0, then perform step S23, if detecting described field prison radar video intensity level to be not more than 0, then gives up described video data；
Step S23: detect described sector and monitor in the set of frequency effective coverage in user-defined field, then perform step S24；Detect described sector not monitor in the set of frequency effective coverage in user-defined field, then give up this video data；
Step S24: whether the field prison radar video intensity level that detection two dimensional field prison video intensity memory space place effective video sector index and video sectors radially index position is equal with the field prison radar video intensity level resolved, unequal, the field prison radar video intensity level resolved replaces described two dimensional field prison common sector, video intensity memory space place index and sector radially to index the field prison radar video intensity level of position, equal, gives up this data.
9. method as claimed in claim 1, it is characterised in that show described in step S3 that the step of field prison radar parsing video data includes:
Step S31: multiple resolved prison video parsing unit are packaged into new field prison radar and resolve video data；
Step S32: scene surveillance radar display terminal resolves described field prison radar and resolves video data, and supervise radar parsing video data renewal two dimensional field prison video intensity memory space according to described field, search the non-zero value of two dimensional field prison video intensity memory space midfield prison radar video intensity level, and calculate field prison terminal video intensity show value, field is supervised video data simultaneously and is shown in scene surveillance radar display terminal.
10. method as claimed in claim 1, it is characterised in that described scene surveillance radar service end also includes monitoring step:
Step S11b1: scene surveillance radar service end is set up network service and intercepted end, sets up scene surveillance radar display terminal list, and the node unit of each list includes a scene surveillance radar display terminal IP value；
Step S11b2: monitor new scene surveillance radar display terminal and scene surveillance radar service end and set up and communicate, then the IP address of increase scene surveillance radar display terminal is to scene surveillance radar display terminal list；
Step S11b3: for the scene surveillance radar display terminal increased, scene surveillance radar service end travels through each node unit in described two dimensional field prison video intensity memory space, and sends non-zero field therein prison radar video intensity level to the scene surveillance radar display terminal being newly added；
Step S11b4: scene surveillance radar service end is constantly intercepted and judged whether the communication connection of scene surveillance radar display terminal is interrupted, if interrupted, is deleted from scene surveillance radar display terminal list by this scene surveillance radar display terminal attribute node.
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