Currently, more than 30 countries are researching and producing unmanned aerial vehicles, and more than 40 countries are using drone technology . China has made great progress and achievements in the research and development of drones. Some experts predict that China will play a leading role in the future market of drones.
UAV aerial survey technology is a technology for quickly collecting and sorting the required geographic information by installing an aeronautical digital camera on the drone.
The aerial survey of drones is less affected by the geographical scope and size, easy to operate, and has high work efficiency. There is no need to worry about the safety hazards of personnel due to equipment and external conditions, so it has great advantages in the future application process.
Second, the UAV application mine mapping
1, technical application
Digital mine construction is an important means of mine information management. Its construction requires basic geographic information data, including remote sensing images, topographic maps and DEM data. With the rapid development of mine construction, it is necessary to update basic geographic data in a timely manner, but conventional The measurement method has a long cycle and high cost, and it is difficult to adapt to the needs of digital mine construction.
In order to strengthen the construction of digital mines, the use of modern surveying and mapping means such as unmanned aerial photography technology to collect and process the topographic data of mining areas will help to establish a digital model of mining areas, provide effective data for mining and management, and promote comprehensive protection of mine resources.
2, system composition and operation examples
Under normal circumstances, the aerial survey system of drones includes UAV flight platforms, flight navigation and control systems, ground monitoring systems, data transmission systems, launch and recovery systems, and field support equipment.
The aerial measurement process generally determines the shooting range, camera geometric calibration, route design, control point layout, and image data processing.
How do drones perform low-altitude aerial surveys? What are the detailed steps? What are the precautions in aerial surveying? Here are the steps for a simple aerial survey drone.
1. Determine weather conditions
The quality of the weather directly affects the effect of aerial surveying. Therefore, before the aerial photography, it is necessary to grasp the weather conditions of the day and observe the thickness of the clouds, the illumination and the visibility of the air.
2, determine the site wind speed
After arriving at the aerial survey site, the wind speed is first determined. Look at whether the mapping drone can resist the wind speed at that time, and whether it can adapt to the current temperature (different drones have different resistance conditions).
3, set up the catapult
The catapult is generally erected against the wind, mainly to ensure the aircraft take off smoothly.
4, set up a radio station
The radio is used for communication between the ground station and the drone.
5, the drone is placed on the catapult
During installation, check whether the components of the drone are tightly connected, whether the power supply wiring of the ejection frame is properly connected, and whether the power is sufficient.
6, manual remote control test
Adjust the flight mode to the manual remote flight state, and test whether the nose, body and tail can operate according to the instructions. The manual remote control mode is mainly used for emergency treatment when the drone takes off and land in case of special circumstances.
7. Preparation before takeoff
Before taking off, check whether the aerial camera and the flight control system are connected. The parachute bag is on standby, parallel to the wind direction, and no personnel vehicles are moving.
8, the drone takes off
After the preparations are completed, you can take off. At this time, the operator should hold the manual lever to stand by, observe the situation on the spot, and manually adjust the attitude and flight height of the aircraft at any time as needed.
9, flight monitoring
This process mainly does three things:
1 monitoring of altitude, speed and flight path;
2 engine speed and airspeed, ground speed monitoring;
At 3 o'clock, check the number of photo shots.
10, drone landing
After the drone has completed the aerial flight according to the set route, it landed at the designated location. The manual remote control operator is on standby at the designated place, and the landing site is adjusted in time when the landing scene suddenly blows strong winds and people move.
11, data export check
After landing, the photo data and the aircraft as a whole are examined and evaluated, and the go-around rate and attitude angle are used to judge whether or not to go around.
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