Position estimation device and position estimation method

1. A flight vehicle, comprising:

a plurality of rotors;

a Global Positioning System (GPS) receiver configured to receive a GPS signal from a GPS satellite;

a camera of the flight vehicle, wherein the camera is configured to capture an image;

a first sensor, different from the camera, configured to receive an invisible signal for estimation of an altitude of the flight vehicle; and

circuitry configured to:

control a flight of the flight vehicle based on the plurality of rotors, wherein

the flight corresponds to at least one of a hovering operation of the flight vehicle, a movement of the flight vehicle, or a turning operation of the flight vehicle, and

the flight is based on flight route information; and

control, during the flight of the flight vehicle, a flight position of the flight vehicle based on the received GPS signal, the captured image, and the received invisible signal.

2. The flight vehicle according to claim 1 , wherein

the camera is on a lower side of the flight vehicle, and

the camera is configured to capture the image in a downward direction with respect to the flight vehicle.

3. The flight vehicle according to claim 1 , wherein

the first sensor is an ultrasonic sensor,

the invisible signal is an ultrasonic wave, and

the ultrasonic sensor is configured to:

emit the ultrasonic wave in a downward direction with respect to the flight vehicle; and

receive, as the invisible signal, a reflected wave of the ultrasonic wave.

4. The flight vehicle according to claim 2 , wherein the camera includes at least a first lower side camera and a second lower side camera.

5. The flight vehicle according to claim 4 , wherein

each of the first lower side camera and the second lower side camera is for stereo Simultaneous Localization and Mapping (SLAM), and

the stereo SLAM is for position estimation of the flight vehicle.

6. The flight vehicle according to claim 1 , further comprising a second sensor, wherein

the second sensor is an inertial sensor, and

the circuitry is further configured to estimate, during the flight of the flight vehicle, the flight position and a posture of the flight vehicle based on the inertial sensor.

7. The flight vehicle according to claim 6 , wherein the inertial sensor includes a gyro sensor and an acceleration sensor.

8. The flight vehicle according to claim 6 , wherein

the circuitry is further configured to determine a weight of a position estimation system that includes at least two of the GPS receiver, the camera, the first sensor, or the second sensor.

9. The flight vehicle according to claim 8 , wherein the circuitry is further configured to determine the weight of the position estimation system based on a status of the GPS receiver.

10. The flight vehicle according to claim 1 , further comprising a gimbal for the camera.

11. The flight vehicle according to claim 1 , wherein

a flight area of the flight vehicle includes a first area and a second area,

the first area is an area in which a sufficient GPS signal reaches from the GPS satellite, and

the second area is an area in which an insufficient GPS signal reaches from the GPS satellite.

12. The flight vehicle according to claim 11 , wherein a strength of the sufficient GPS signal is greater than a strength of the insufficient GPS signal.

13. The flight vehicle according to claim 11 , wherein

the first area is in outdoor environment and the second area is in indoor environment, and

the flight vehicle is configured to reciprocate between the outdoor environment and the indoor environment.

14. A method, comprising:

in a flight vehicle that includes a plurality of rotors, a Global Positioning System (GPS) receiver, a camera of the flight vehicle, a sensor different from the camera, and circuitry:

receiving, by the GPS receiver, a GPS signal from a GPS satellite;

capturing, by the camera, an image;

receiving, by the sensor, an invisible signal for estimation of an altitude of the flight vehicle;

controlling, by the circuitry, a flight of the flight vehicle based on the plurality of rotors, wherein

the flight corresponds to at least one of a hovering operation of the flight vehicle, a movement of the flight vehicle, or a turning operation of the flight vehicle, and

the flight is based on flight route information; and

controlling, by the circuitry, during the flight of the flight vehicle, a flight position of the flight vehicle based on the received GPS signal, the captured image, and the received invisible signal.

15. A non-transitory computer-readable medium having stored thereon computer-executable instructions, which when executed by a processor of a flight vehicle, cause the processor to execute operations, the operations comprising:

controlling a Global Positioning System (GPS) receiver of the flight vehicle to receive a GPS signal from a GPS satellite;

controlling a camera of the flight vehicle to capture an image;

controlling a sensor of the flight vehicle to receive an invisible signal for estimation of an altitude of the flight vehicle, wherein the sensor is different from the camera;

controlling a flight of the flight vehicle based on a plurality of rotors of the flight vehicle, wherein

the flight corresponds to at least one of a hovering operation of the flight vehicle, a movement of the flight vehicle, or a turning operation of the flight vehicle, and

the flight is based on flight route information; and

controlling, during the flight of the flight vehicle, a flight position of the flight vehicle based on the received GPS signal, the captured image, and the received invisible signal.