Tilt the tree shadow to measure the tree barrier, see how FM-T1 does
Fixed-wing drones are not practical in the power industry! The output is just a "higher-definition satellite map".
Such remarks are believed to have been heard by many people.
Are fixed-wing drones really not practical in the power industry? Shaanxi Power Grid has shattered this statement with practical applications.
The use of fixed-wing UAVs for tilt photography to measure tree barriers has few practical applications in China. However, this is the normal state in the inspection work of the fixed-wing UAV in Shaanxi Power Grid.
In 2017 alone, Feimeng Airlines used the self-developed FM=T1 tilt-rotor fixed-wing UAV to carry out tilt photography and tree barriers for the Shaanxi Radio and Television Bureau. The flight mileage exceeded 200,000 kilometers and completed the inspection of 80,000 km of effective transmission lines. Found a tree barrier at 7455.
Some parts of Shaanxi belong to mountainous and forestous areas, the terrain is more complicated, and the transmission lines are mostly located in the alpine jungle, coupled with road restrictions. Sometimes a line of inspection can only cross two mountains a day, check 2-3 power bases. Tower. When using a hand-held laser range finder to measure a tree barrier, the error is large because of the difference in measurement angle and measurement location.
How to use a fixed-wing drone to perform tilt photography to measure a tree barrier?
Take the FM-T1 tilting rotor drone operation as an example. The FM-T1 is equipped with a dual-camera system for tilt-tilt photography to obtain data. After successful 3D modeling in the industry, manually assisted in forming a wire model to determine the distance of the canopy from the cable. Through the comparison of data over different time periods, the change of trees can also be tracked in real time.
FM-T1
Patrol route map displayed in FM-T1 ground station
At present, the FM-T1 tilt-rotor fixed-wing unmanned aerial vehicle can be used to inspect 70-80km power lines at a time. The average number of drones can be 120 towers per trip. The working efficiency is dozens of times that of traditional manual inspection. .
The method of tilting the photometric tree barn seems to be simple, but in actual use, the attitude of the foreign aircraft, the position of the camera, etc. will affect the data quality, plus the fitting degree of the artificial line and the real wire in the industry, I want to achieve Tilt photography to measure tree barriers, there are many problems to be solved.
“Through the distance between the conductor and the ground, the distance between the tower base, the distance between the conductors, and the distance between the conductor and the tree, the Shaanxi power grid uses the UAV tilt camera to measure the tree barrier with an error of only 0.5 meters, which is in the forefront of the international power industry.â€
Although the error is now 0.5 meters, in order to obtain better operation schemes in 2018 work, improve measurement accuracy and efficiency of external hidden troubles in transmission line channels, and reduce the cost of use, currently, the technicians of Feimeng carry FM- T1, the same line flew nine times in a row.
Before the operation, the route needs to be audited, the site safety layout, etc., and the real-time monitoring, data data monitoring, etc. are continuously carried out during the flight, and the pos data is checked after the flight check.
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