US 12,008,910 B2
UAV system emergency path planning on communication failure
Rahul Singh, Navi Mumbai (IN)
Assigned to IDEAFORGE TECHNOLOGY PVT. LTD, Navi Mumbai (IN)
Appl. No. 16/636,412
Filed by IDEAFORGE TECHNOLOGY PVT. LTD, Navi Mumbai (IN)
PCT Filed Jul. 27, 2018, PCT No. PCT/IB2018/055628
§ 371(c)(1), (2) Date Feb. 4, 2020,
PCT Pub. No. WO2019/025919, PCT Pub. Date Feb. 7, 2019.
Claims priority of application No. 201721027849 (IN), filed on Aug. 4, 2017.
Prior Publication US 2020/0175882 A1, Jun. 4, 2020
Int. Cl. G08G 5/00 (2006.01); B64C 39/02 (2023.01); G05D 1/00 (2006.01)
CPC G08G 5/0039 (2013.01) [B64C 39/024 (2013.01); G05D 1/0022 (2013.01); G05D 1/0055 (2013.01); G08G 5/0056 (2013.01); G08G 5/0069 (2013.01); B64U 2201/20 (2023.01)] 10 Claims
OG exemplary drawing
 
1. A method for emergency path planning for an Unmanned Aerial Vehicle (UAV) in an event of communication failure on account of an obstacle, said UAV moving along a path having a plurality of communication waypoints, each communication waypoint providing communication between the UAV and a home location through a wireless radio link, the method comprising the steps of:
detecting, by a flight control system of the UAV, a communication failure resulting from loss of wireless radio link communication;
enabling, by the flight control system, on detection of the communication failure, the UAV to return to a last healthy communication waypoint location, the last healthy communication waypoint location being a communication waypoint out of the plurality of communication waypoints with healthy signal and selected based on one or more factors selected from the group of on-board sensor status/condition and nominal mission parameters comprising total time, total distance, distance travelled, payload weight, payload condition/health; and
waiting, at the last healthy communication waypoint location, by the flight control system, for a defined time period for communication to return before enabling the UAV to return to its home location.