This article will take an old site of a red revolutionary base in Hubei as an example, and according to the site conditions and mission requirements, choose Tianteng Aviation Angel Raptor UAV to introduce its application in archaeology. This aircraft has the characteristics of modular design of flight vehicles, easy to carry, diverse payloads, and easy operation. The pitot tube adopts a water-air separation design, which can work in a rainy environment. The take-off method is catapult take-off, and the landing method is to use a parachute (using a throwing canopy design). .
1. Find the take-off and landing site
Arriving in the survey area, look for a site that is easy for the drone to take off. Since there are lush trees and a few lakes around the mission area, according to the actual situation on the site, the take-off method selected this time is vehicle-mounted catapult take-off.
route design
2. Design route
Route planning is carried out on a computer equipped with flight control software. During route planning, special attention should be paid to whether the altitude, forward overlap, side overlap, and SD (ground resolution) data in the mission area meet the requirements.
3. Assembly and testing before flight
Check and assemble all parts of the drone, and then carry out the inspection before the drone takes off according to the requirements of the ground station. When the drone passes the fifteen-step joint test, the drone can be placed on the catapult rack. Ready to take off.
4. Automatic photography collection
AVIAN-P is a fully automatic intelligent drone that can fly and shoot autonomously in the air according to the route. When the drone is flying in the air, always pay attention to the flying attitude of the drone, such as the orientation, altitude, speed, voltage, etc. of the drone. In case of emergencies, the manual mode can be switched, and emergency parachute opening measures can be carried out if necessary.
5. Parachute landing
The landing methods of AVIAN-P are divided into two types: automatic parachute landing and manual parachute landing. When the UAV lands, immediately find the UAV after landing, and cut off the battery power and air power in time to ensure that the UAV is protected from secondary damage.
6. Measurement of phase control points
The measuring instrument used for the collection of phase control points is Huashi X10. When laying the phase control points, the layout should be reasonable, evenly distributed, and clearly marked. When performing RTK measurement, it is necessary to meet the requirements of relevant specifications and project plans, and after the control point detection and repeated measurement and comparison of the same image control point, the final data are all within the allowable error range. At this time, the collection of field data has also come to an end.
7. Post data processing
The data processing software used is the professional aerial survey software Pix4dmapper. After importing the original aerial photos, POS data, and phased point data into the software, and after a series of preprocessing and processing, the software can automatically complete the calculation of aerial triangulation, DEM generation, and DOM mosaicking. A complete orthophoto image will be obtained.
point cloud
DSM diagram
DOM graph
After software processing, DSM and DOM are obtained. The field measured data is superimposed and compared with the DOM data. Through measurement, the error is within 5cm, which fully meets the accuracy requirements.
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