CN111711480A - Forest zone fire prevention and harm control unmanned aerial vehicle unit linked system - Google Patents
Forest zone fire prevention and harm control unmanned aerial vehicle unit linked system Download PDFInfo
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- A62C3/0228—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires with delivery of fire extinguishing material by air or aircraft
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- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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- B64—AIRCRAFT; AVIATION; COSMONAUTICS
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Abstract
The invention discloses a forest fire prevention and harm control unmanned aerial vehicle set linkage system, and relates to the technical field of garden protection; including unmanned aerial vehicle group, basic station and the ground control center who establishes the communication connection, unmanned aerial vehicle group includes unmanned aerial vehicle monitoring group and unmanned aerial vehicle response group, unmanned aerial vehicle monitoring group carries there is the monitoring subassembly, unmanned aerial vehicle response group carries there are extinguishing device and deinsectization pest control device. The forest patrol and defense linkage system integrates daily monitoring, data analysis, fire control treatment and pest control, takes unmanned aerial vehicle formation as main equipment and the base station as auxiliary equipment, realizes the omnibearing all-weather monitoring of parameters such as wind direction, smoke, temperature, humidity and the like in forest, simultaneously, the monitored data is uploaded in real time through the base station, the size of fire scale can be obtained when fire occurs, fire extinguishing measures can be carried out according to the scale, large-area pesticide spreading can be carried out when pest occurs, the phenomena of disorder cutting and disorder cutting can be controlled, and daily supervision on forest fire control and ecological health is provided.
Description
Technical Field
The invention relates to the technical field of garden protection, in particular to a linkage system of a forest fire prevention and harm control unmanned aerial vehicle unit.
Background
The humanistic resources and the geographical and environmental resources in the garden are very rich, and the garden has higher scientific, cultural and ornamental values, but recently, the fire hazard in the garden of China frequently occurs, so that a plurality of long-term cultural buildings and landscapes are damaged, and the loss is difficult to compensate, so that the fire prevention work in the garden is not slow.
Through the retrieval, chinese patent publication is CN210302115U discloses a gardens safety district fire protection system, and it is including the pump head that draws water, the fixed surface of the pump head that draws water is connected with the raceway, the surface of raceway is provided with the suction pump, there is the PLC controller on the surface of suction pump through electric wire electric connection, the fixed surface of PLC controller is connected with power adapter and signal receiver, the one end fixedly connected with fire prevention water jet equipment who draws water the pump head is kept away from to the raceway, fire prevention water jet equipment includes the device base, the surface of device base is seted up and is matched the through-hole that suits with the raceway, the top surface fixedly connected with swivelling joint pipe of device base, the inner wall of swivelling joint pipe is responsible for through bearing fixedly connected with water delivery, through infrared temperature sensor, PLC controller, the pump head that draws water, raceway and L shape spray pipe.
The above patents suffer from the following disadvantages: it can only passively prevent fires, can initiatively put out a fire when the conflagration appears, can't be to environmental analysis monitoring, prevention conflagration.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a linkage system for a forest fire prevention and harm control unmanned aerial vehicle unit.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a forest zone fire prevention harm control unmanned aerial vehicle aggregate linked system, is including unmanned aerial vehicle group, basic station and the ground control center who establishes the communication connection, and unmanned aerial vehicle group includes that unmanned aerial vehicle monitors to organize and unmanned aerial vehicle response group, unmanned aerial vehicle monitoring group carries there is the monitoring subassembly, unmanned aerial vehicle response group carries there is extinguishing device and deinsectization harm control device, and its specific use steps are as follows:
s1: according to the scale of the whole forest area and the planning of a system, equipment is matched and installed in place one by one, and communication connection is established between the unmanned aerial vehicle set, the base station and the ground control center;
s2: a commander controls an unmanned aerial vehicle monitoring group to carry out cruise monitoring according to a preset air route through a human-computer interaction device of a ground control center, and feeds back position information in real time through a GPS (global positioning system);
s3: by utilizing a networking mode, the unmanned aerial vehicle monitoring group transmits monitoring data to the base station, and then the base station further transmits the monitoring data to the ground control center;
s4: the ground control center analyzes the transmission pictures and utilizes a forest fire monitoring algorithm to monitor and judge whether a fire occurs in real time;
s5: when the electric quantity of the unmanned aerial vehicle unit is insufficient, a landing request signal is sent to the intelligent landing station, the intelligent landing station receives the signal through the wireless data transmission module, and preparation work is carried out for landing and replacing the battery of the unmanned aerial vehicle;
s6: when a fire disaster occurs, the system drives the alarm device to alarm, a user can observe dynamic information of forest fire at the upper computer interface of monitoring, real-time monitoring of forest fire and plant diseases and insect pests is achieved, and the unmanned aerial vehicle responds to the group to take off at the moment and put out fire hazards and plant diseases and insect pests in areas.
Preferably: the monitoring assembly comprises a network type temperature sensor, a point type smoke detector, an active infrared beam detector, a combustible gas detector and a thermal imaging processor, and any combination of the network type temperature sensor, the point type smoke detector, the active infrared beam detector and the combustible gas detector can be selected according to the requirements of actual users.
Preferably: the fire extinguishing device comprises a water mist fire extinguisher, an HLK superfine dry powder machine throwing type forest fire extinguisher, a forest fire extinguishing water gun device, a forest fire extinguishing bomb and a carbon dioxide gas fire extinguishing device, and one or more of the fire extinguishing devices are selected to be carried according to actual plants in a forest area.
Preferably: the insect-killing and pest-controlling device is a pesticide sprayer.
Preferably: the base station comprises a main body fixed on the ground through supporting legs, a lifting skylight, a solar cell panel and a motor are arranged at the top of the main body, the skylight provides lifting power, mechanical arms are arranged on the inner wall of the main body, the inner wall of the bottom of the main body is connected with a bearing table through an expansion shaft, and a supply storage chamber is arranged on the inner wall of the bottom of the main body and the ground.
Preferably: in the S3, the detection data transmission of the unmanned aerial vehicle group adopts the Lightbridge2 image transmission system, which supports a plurality of interface outputs including USB, miniHDMI, 3G-SDI and other interfaces, supports a full high definition output up to 1080p/60fps, uses the wireless link dynamic adaptation technology to balance the conflicts of distance, electromagnetic environment and image quality, can automatically select the best channel, and switch the channel and adjust the video bandwidth when necessary.
Preferably: the human-computer interaction device of the ground control center adopts an upper computer control system which is developed by utilizing C + + design and provides functions of new user registration and user login, a new user needs to register when in use, a registration interface can be automatically popped up by clicking a user registration button, and when in login, when input login information is not matched, the system can automatically pop up a window to prompt login errors.
Preferably: the fire prevention and extinguishing monitoring and using method of the human-computer interaction device of the ground control center comprises the following steps:
a1: when a user clicks a start detection button, the system adopts a forest fire monitoring algorithm to monitor and identify forest fires and marks the forest fires;
a2: the shooting function of the upper computer interface can enable a user to store pictures at any time, and the user can inquire and trace historical abnormal events by clicking an inquiry button;
a3: when a fire occurs, the system software automatically stores the images into the corresponding folders to wait for uploading;
a4: and the system for clicking and closing the camera button can not accept the image information returned by the unmanned aerial vehicle any more.
Preferably: the pest and disease prevention using method of the human-computer interaction device of the ground control center comprises the following steps:
b1: a user observes the actual condition of the forest area according to the picture fed back by the unmanned aerial vehicle set;
b2: when the vegetation crops have diseases and pests, preparing corresponding pesticides according to the types of the diseases and pests and putting the pesticides into a base station;
b3: and controlling the unmanned aerial vehicle response group to extract the pesticide of the base station and spraying the pesticide to a pest and disease damage area.
Preferably: the human-computer interaction device of the ground control center selects three buttons in the flight mode of the unmanned aerial vehicle in the interface, the mode 1 is to fly according to the preset program of the unmanned aerial vehicle set, the mode 2 is a GPS air route planning flight mode, and the mode 3 is to fly in the appointed direction.
The invention has the beneficial effects that:
1. the forest patrol and defense linkage system integrates daily monitoring, data analysis, fire control treatment and pest control, takes unmanned aerial vehicle formation as main equipment and takes a base station as auxiliary equipment, and realizes omnibearing and all-weather monitoring on parameters such as wind direction, smoke, temperature, humidity and the like in forest. Meanwhile, various monitored data are uploaded in real time through the base station, whether conditions unfavorable for forest ecological health, such as fire hidden dangers, forest insect pests, excessive cutting and excessive cutting, exist is analyzed through data comparison, the fire scale size can be obtained when the fire occurs, fire extinguishing measures are taken according to the scale, large-area pesticide spraying can be achieved when the insect pests occur, the phenomenon of the excessive cutting and the excessive cutting can be controlled, and daily supervision on the aspects of forest fire fighting and ecological health is provided.
Drawings
FIG. 1 is a schematic structural diagram of a base station in a linkage system of a forest fire prevention and harm control unmanned aerial vehicle;
in the figure: the solar energy storage system comprises a solar panel 1, a motor 2, a mechanical arm 3, a battery bin 4, supporting legs 5, a replenishment storage chamber 6, a main body 7, a bearing table 8 and a skylight 9.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1:
the utility model provides a forest zone fire prevention harm control unmanned aerial vehicle aggregate linked system, includes unmanned aerial vehicle group, basic station and the ground control center who establishes the communication connection, and unmanned aerial vehicle group includes that unmanned aerial vehicle monitors group and unmanned aerial vehicle response group, unmanned aerial vehicle monitoring group carries there is the monitoring subassembly, unmanned aerial vehicle response group carries there is extinguishing device, and its specific use step is as follows:
s1: according to the scale of the whole forest area and the planning of a system, equipment is matched and installed in place one by one, and communication connection is established between the unmanned aerial vehicle set, the base station and the ground control center;
s2: a commander controls an unmanned aerial vehicle monitoring group to carry out cruise monitoring according to a preset air route through a human-computer interaction device of a ground control center, and feeds back position information in real time through a GPS (global positioning system);
s3: by utilizing a networking mode, the unmanned aerial vehicle monitoring group transmits monitoring data to the base station, and then the base station further transmits the monitoring data to the ground control center;
s4: the ground control center analyzes the transmission pictures and utilizes a forest fire monitoring algorithm to monitor and judge whether a fire occurs in real time;
s5: when the electric quantity of the unmanned aerial vehicle unit is insufficient, a landing request signal is sent to the intelligent landing station, the intelligent landing station receives the signal through the wireless data transmission module, and preparation work is carried out for landing and replacing the battery of the unmanned aerial vehicle;
s6: when a fire disaster occurs, the system drives the alarm device to alarm, a user can observe dynamic information of forest fires at the monitored upper computer interface, real-time monitoring of the forest fires is achieved, and the unmanned aerial vehicle responds to the group to take off at the moment, so that fire disaster areas are put out.
The monitoring assembly comprises a network type temperature sensor, a point type smoke detector, an active infrared beam detector, a combustible gas detector and a thermal imaging processor, and any combination of the network type temperature sensor, the point type smoke detector, the active infrared beam detector and the combustible gas detector can be selected according to the requirements of actual users.
The fire extinguishing device comprises a water mist fire extinguisher, an HLK superfine dry powder machine throwing type forest fire extinguisher, a forest fire extinguishing water gun device, a forest fire extinguishing bomb and a carbon dioxide gas fire extinguishing device, and one or more of the fire extinguishing devices are selected to be carried according to actual plants in a forest area.
The base station is fixed on a main body 7 of the ground through supporting legs 5, a lifting skylight 9, a solar cell panel 1 and a motor 2 for providing lifting power for the skylight 9 are arranged at the top of the main body 7, a mechanical arm 3 is arranged on the inner wall of the main body 7, a bearing platform 8 is connected to the inner wall of the bottom of the main body 7 through a telescopic shaft, and a supply storage chamber 6 is arranged on the inner wall of the bottom of the main body 7 and the ground.
In the S3, the detection data transmission of the unmanned aerial vehicle group adopts the Lightbridge2 image transmission system, which supports a plurality of interface outputs including USB, miniHDMI, 3G-SDI and other interfaces, supports a full high definition output up to 1080p/60fps, uses the wireless link dynamic adaptation technology to balance the conflicts of distance, electromagnetic environment and image quality, can automatically select the best channel, and switch the channel and adjust the video bandwidth when necessary.
The human-computer interaction device of the ground control center adopts an upper computer control system which is developed by utilizing C + + design and provides functions of new user registration and user login, a new user needs to register when in use, a registration interface can be automatically popped up by clicking a user registration button, and when in login, when input login information is not matched, the system can automatically pop up a window to prompt login errors.
The fire prevention and extinguishing monitoring and using method of the man-machine interaction device of the ground control center comprises the following steps:
a1: when a user clicks a start detection button, the system adopts a forest fire monitoring algorithm to monitor and identify forest fires and marks the forest fires;
a2: the shooting function of the upper computer interface can enable a user to store pictures at any time, and the user can inquire and trace historical abnormal events by clicking an inquiry button;
a3: when a fire occurs, the system software automatically stores the images into the corresponding folders to wait for uploading;
a4: and the system for clicking and closing the camera button can not accept the image information returned by the unmanned aerial vehicle any more.
The human-computer interaction device of the ground control center selects three buttons in the flight mode of the unmanned aerial vehicle in the interface, the mode 1 is to fly according to the preset program of the unmanned aerial vehicle set, the mode 2 is a GPS air route planning flight mode, and the mode 3 is to fly in the appointed direction.
Example 2:
the utility model provides a forest zone fire prevention harm control unmanned aerial vehicle aggregate linked system, is including unmanned aerial vehicle group, basic station and the ground control center who establishes the communication connection, and unmanned aerial vehicle group includes that unmanned aerial vehicle monitors to organize and unmanned aerial vehicle response group, unmanned aerial vehicle monitoring group carries there is the monitoring subassembly, unmanned aerial vehicle response group carries there is extinguishing device and deinsectization harm control device, and its specific use steps are as follows:
s1: according to the scale of the whole forest area and the planning of a system, equipment is matched and installed in place one by one, and communication connection is established between the unmanned aerial vehicle set, the base station and the ground control center;
s2: a commander controls an unmanned aerial vehicle monitoring group to carry out cruise monitoring according to a preset air route through a human-computer interaction device of a ground control center, and feeds back position information in real time through a GPS (global positioning system);
s3: by utilizing a networking mode, the unmanned aerial vehicle monitoring group transmits monitoring data to the base station, and then the base station further transmits the monitoring data to the ground control center;
s4: the ground control center analyzes the transmission pictures and utilizes a forest fire monitoring algorithm to monitor and judge whether a fire occurs in real time;
s5: when the electric quantity of the unmanned aerial vehicle unit is insufficient, a landing request signal is sent to the intelligent landing station, the intelligent landing station receives the signal through the wireless data transmission module, and preparation work is carried out for landing and replacing the battery of the unmanned aerial vehicle;
s6: when a fire disaster occurs, the system drives the alarm device to alarm, a user can observe dynamic information of forest fire at the upper computer interface of monitoring, real-time monitoring of forest fire and plant diseases and insect pests is achieved, and the unmanned aerial vehicle responds to the group to take off at the moment and put out fire hazards and plant diseases and insect pests in areas.
The monitoring assembly comprises a network type temperature sensor, a point type smoke detector, an active infrared beam detector, a combustible gas detector and a thermal imaging processor, and any combination of the network type temperature sensor, the point type smoke detector, the active infrared beam detector and the combustible gas detector can be selected according to the requirements of actual users.
The fire extinguishing device comprises a water mist fire extinguisher, an HLK superfine dry powder machine throwing type forest fire extinguisher, a forest fire extinguishing water gun device, a forest fire extinguishing bomb and a carbon dioxide gas fire extinguishing device, and one or more of the fire extinguishing devices are selected to be carried according to actual plants in a forest area.
The insect-killing and pest-controlling device is a pesticide sprayer.
The base station comprises a main body 7 fixed on the ground through supporting legs 5, a lifting skylight 9, a solar cell panel 1 and a motor 2 for providing lifting power for the skylight 9 are arranged at the top of the main body 7, a mechanical arm 3 is arranged on the inner wall of the main body 7, a bearing platform 8 is connected to the inner wall of the bottom of the main body 7 through a telescopic shaft, and a supply storage chamber 6 is arranged on the inner wall of the bottom of the main body 7 and the ground.
In the S3, the detection data transmission of the unmanned aerial vehicle group adopts the Lightbridge2 image transmission system, which supports a plurality of interface outputs including USB, miniHDMI, 3G-SDI and other interfaces, supports a full high definition output up to 1080p/60fps, uses the wireless link dynamic adaptation technology to balance the conflicts of distance, electromagnetic environment and image quality, can automatically select the best channel, and switch the channel and adjust the video bandwidth when necessary.
The human-computer interaction device of the ground control center adopts an upper computer control system which is developed by utilizing C + + design and provides functions of new user registration and user login, a new user needs to register when in use, a registration interface can be automatically popped up by clicking a user registration button, and when in login, when input login information is not matched, the system can automatically pop up a window to prompt login errors.
The fire prevention and extinguishing monitoring and using method of the human-computer interaction device of the ground control center comprises the following steps:
a1: when a user clicks a start detection button, the system adopts a forest fire monitoring algorithm to monitor and identify forest fires and marks the forest fires;
a2: the shooting function of the upper computer interface can enable a user to store pictures at any time, and the user can inquire and trace historical abnormal events by clicking an inquiry button;
a3: when a fire occurs, the system software automatically stores the images into the corresponding folders to wait for uploading;
a4: and the system for clicking and closing the camera button can not accept the image information returned by the unmanned aerial vehicle any more.
The pest and disease prevention using method of the human-computer interaction device of the ground control center comprises the following steps:
b1: a user observes the actual condition of the forest area according to the picture fed back by the unmanned aerial vehicle set;
b2: when the vegetation crops have diseases and pests, preparing corresponding pesticides according to the types of the diseases and pests and putting the pesticides into a base station;
b3: and controlling the unmanned aerial vehicle response group to extract the pesticide of the base station and spraying the pesticide to a pest and disease damage area.
The human-computer interaction device of the ground control center selects three buttons in the flight mode of the unmanned aerial vehicle in the interface, the mode 1 is to fly according to the preset program of the unmanned aerial vehicle set, the mode 2 is a GPS air route planning flight mode, and the mode 3 is to fly in the appointed direction.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides a forest zone fire prevention is controlled and is harmd unmanned aerial vehicle aggregate unit linked system, a serial communication port, including unmanned aerial vehicle group, basic station and the ground control center who establishes the communication connection, unmanned aerial vehicle group includes unmanned aerial vehicle monitoring group and unmanned aerial vehicle response group, unmanned aerial vehicle monitoring group carries there is the monitoring subassembly, unmanned aerial vehicle response group carries there is extinguishing device and deinsectization to control the evil device, and its specific use step is as follows:
s1: according to the scale of the whole forest area and the planning of a system, equipment is matched and installed in place one by one, and communication connection is established between the unmanned aerial vehicle set, the base station and the ground control center;
s2: a commander controls an unmanned aerial vehicle monitoring group to carry out cruise monitoring according to a preset air route through a human-computer interaction device of a ground control center, and feeds back position information in real time through a GPS (global positioning system);
s3: by utilizing a networking mode, the unmanned aerial vehicle monitoring group transmits monitoring data to the base station, and then the base station further transmits the monitoring data to the ground control center;
s4: the ground control center analyzes the transmission pictures and utilizes a forest fire monitoring algorithm to monitor and judge whether a fire occurs in real time;
s5: when the electric quantity of the unmanned aerial vehicle unit is insufficient, a landing request signal is sent to the intelligent landing station, the intelligent landing station receives the signal through the wireless data transmission module, and preparation work is carried out for landing and replacing the battery of the unmanned aerial vehicle;
s6: when a fire disaster occurs, the system drives the alarm device to alarm, a user can observe dynamic information of forest fire at the upper computer interface of monitoring, real-time monitoring of forest fire and plant diseases and insect pests is achieved, and the unmanned aerial vehicle responds to the group to take off at the moment and put out fire hazards and plant diseases and insect pests in areas.
2. The forest fire prevention and harm control unmanned aerial vehicle linkage system of claim 1, wherein the monitoring component comprises a network type temperature sensor, a point type smoke detector, an active infrared beam detector, a combustible gas detector and a thermal imaging processor, and any combination of the network type temperature sensor, the point type smoke detector, the active infrared beam detector and the combustible gas detector can be selected according to actual user requirements.
3. The forest fire prevention and harm control unmanned aerial vehicle linkage system of claim 1, wherein the fire extinguishing device comprises a water mist fire extinguisher, an HLK superfine dry powder machine throwing type forest fire extinguisher, a forest fire extinguishing water gun device, a forest fire extinguishing bomb and a carbon dioxide gas fire extinguishing device, and one or more of the fire extinguishing devices are selected to be carried according to actual plants in the forest.
4. The forestry plant fire prevention and pest control unmanned aerial vehicle linkage system of claim 1, wherein the pest control device is a pesticide sprayer.
5. The forest fire prevention and harm control unmanned aerial vehicle linkage system according to claim 1, wherein the base station comprises a main body (7) fixed on the ground through support legs (5), a lifting skylight (9), a solar cell panel (1) and a motor (2) for providing lifting power for the skylight (9) are arranged at the top of the main body (7), a mechanical arm (3) is arranged on the inner wall of the main body (7), a bearing platform (8) is connected to the inner wall of the bottom of the main body (7) through an expansion shaft, and a supply storage room (6) is arranged on the inner wall of the bottom of the main body (7) and the ground.
6. The linkage system of claim 1, wherein in S3, the unmanned aerial vehicle uses a Lightbridge2 image transmission system for transmission of detection data, which supports multiple interface outputs including USB, miniHDMI, and 3G-SDI, and supports up to 1080p/60fps full high definition output, and uses dynamic wireless link adaptation to balance the conflict of distance, electromagnetic environment, and image quality, and can automatically select the best channel, switch channels and adjust video bandwidth when necessary.
7. The linkage system according to claim 1, wherein the human-computer interaction device of the ground control center adopts an upper computer control system, which is developed by utilizing a C + + design and provides functions of new user registration and user login, a new user needs to register when using the linkage system, a user registration button is clicked to automatically pop up a registration interface, and when login information is not matched, the system automatically pops up a window to prompt a login error.
The forest fire prevention and harm control unmanned aerial vehicle linkage system of claim 1, wherein the fire prevention and extinguishment monitoring and use method of the human-computer interaction device of the ground control center is as follows:
a1: when a user clicks a start detection button, the system adopts a forest fire monitoring algorithm to monitor and identify forest fires and marks the forest fires;
a2: the shooting function of the upper computer interface can enable a user to store pictures at any time, and the user can inquire and trace historical abnormal events by clicking an inquiry button;
a3: when a fire occurs, the system software automatically stores the images into the corresponding folders to wait for uploading;
a4: and the system for clicking and closing the camera button can not accept the image information returned by the unmanned aerial vehicle any more.
8. The forest fire prevention and harm control unmanned aerial vehicle linkage system of claim 1, wherein a pest control use method of the human-computer interaction device of the ground control center is as follows:
b1: a user observes the actual condition of the forest area according to the picture fed back by the unmanned aerial vehicle set;
b2: when the vegetation crops have diseases and pests, preparing corresponding pesticides according to the types of the diseases and pests and putting the pesticides into a base station;
b3: and controlling the unmanned aerial vehicle response group to extract the pesticide of the base station and spraying the pesticide to a pest and disease damage area.
9. The linkage system according to claim 1, wherein the ground control center has three buttons for selecting the flight mode of the unmanned aerial vehicle, the mode 1 is a mode for flying according to a preset program of the unmanned aerial vehicle, the mode 2 is a GPS course planning flight mode, and the mode 3 is a designated direction flight.
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