Rural Land Determination UAV Application Surveying and Mapping UAV Aerial Survey Operation Diagram

In rural land security, the local government departments provide local image maps with low resolution and insufficient precision, which cannot be used as a work base map. In order to obtain a suitable image map of the scale, the low-altitude aerial photography technology of the UAV has become the most important means at present. The surveying and mapping drone can perform full coverage aerial photography with a resolution of 0.05 meters, select the ground control point for orthorectification, improve the geometric accuracy of the image, enhance the interpretability, and produce the current situation, high precision and accurate positioning. : Orthographic image of 1000 scale.

The aerial surveying and mapping drone team can be equipped with 2-3 people. After the aerial photography task is finished, the data will be checked. After passing the test, the subsequent data processing can be performed. In order to give readers a more intuitive experience, we went to Lanzhou, Gansu, to take pictures of the P700E UAV operation scene in the field, and detailed the operation process of mapping UAVs in rural land confirmation, hoping to benefit your work and study. .

1. Determine weather conditions

UAV aerial survey, the weather conditions are good or bad. Before starting 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. Arrive at the take-off location

After determining the weather conditions and the distribution of clouds, it is suitable for aerial photography, and bring the drones, catapults, radio stations, computers and other related equipment to the aerial take-off point. The take-off point is usually inspected in advance, requiring the site to be relatively flat, without wires, high-rise buildings, etc., and determine the order and sequence of aerial photographs in advance.

3. Determine the wind speed at the scene

After arriving at the scene, the wind speed was measured. Huadeng P700E mapping UAV can resist 6 wind speeds, and the temperature is between minus 20 ° C and 60 ° C.

4, set up the catapult

In order to ensure the aircraft take off smoothly, the catapult is generally erected against the wind. The P700E adopts the configuration of the integrated ejection frame, which has small requirements on the site and strong adaptability to the terrain. Compared with other products, the design of the projectile rope is more convenient and quicker, and at the same time guarantees the safety of the operator to the greatest extent.

5, set up a radio station

The radio is used for communication between the ground station and the drone. At this stage, most surveying and mapping drones use radio to exchange data between drones and ground stations. The high-frequency radio of P700E can conduct ultra-long-distance monitoring of up to 50 kilometers to ensure safe and efficient operation of the aircraft.

6, the day's job log

Record the wind speed, weather, takeoff and landing coordinates and other information on the day, and keep a reference for future data reference and analysis.

7, attitude angle adjustment

For take-off locations that are more than 200km from the last take-off location, the attitude and angle of the aircraft must be adjusted to ensure accurate communication. The drone machine is equipped with electronic compass, magnetic calibration and other equipment to ensure the self-attitude control of the aircraft during flight. Due to the different geomagnetic conditions, the P700E self-contained calibration system is used to deal with different geomagnetic conditions. Human-machine interference and safety hazards.

8, the drone is placed on the catapult

During installation, it is necessary to check whether the components of the drone are tightly connected, whether the power supply wiring of the ejection frame is properly connected, and the power is sufficient.

9, manual remote control test

Adjust the flight mode to the manual remote flight state and test whether the nose, body and tail can be operated as directed. The manual remote control mode is mainly used for emergency treatment when the drone takes off and land in case of special circumstances.

10. Prepare 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.

11, 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.

12. Flight monitoring

This process mainly does three things:

1 monitoring of flight height, speed and flight path;

2 monitor engine speed and airspeed and ground speed;

3 Check the number of photo shots at any time.

13, 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 windy scene and the personnel move around at the landing site.

14, data export check

After landing, the photo data and the aircraft as a whole are inspected and evaluated, combined with the line rate and attitude angle to determine whether or not to go around, and continue to complete the aerial mission or transition in the nearby area. Theoretically, the flight control range of a landing point is 300 square kilometers. .

Nationally, UAV remote sensing technology has been applied to rural land rights determination work many times, and the technology has matured. Not only is the accuracy of the results far superior to the traditional measurement methods, but also the work time is greatly shortened, and the workload of rural grassroots managers is reduced. It saves manpower and material resources and is worth promoting in the work of rural land security. The surveying and mapping drone is serving all aspects of economic and social development with its high mobility, cost-effectiveness and high security.