The invention relates to the technical field of unmanned aerial vehicle path planning, in particular to an unmanned aerial vehicle automatic navigation method and
system for
power transmission line inspection. Comprising the steps of collecting
terrain elevation data and a
wind speed fluctuation
signal, generating a line corridor boundary elevation
distribution diagram, analyzing the influence of a
terrain gradient on a
conductor sag, and determining a curvature limitation adjustment demand; re-planning the flight path in combination with the obstacle position information, and generating a detection path sequence; calculating a height abrupt change value and an attitude angle deviation value, judging whether an acceleration
impact suppression requirement exists or not, and generating an inspection risk
score of the
vegetation invasion area; determining a cross span distance risk quantitative index, and generating a flight control
instruction sequence; and verifying whether the path meets a boundary integrity standard, and generating an automatic
navigation path sequence. According to the method, the problems of
instability, insufficient coverage and poor safety of an unmanned aerial vehicle routing inspection path under a complex
terrain condition are solved, and stable, continuous and efficient automatic generation of the
power transmission line routing inspection path is realized.