SHADOW CASTING DRONE

Abstract

The present invention relates to systems for protecting against sun's damaging rays, and against unwanted onlookers like drones. The systems comprise a drone and a covering member attached to the drone. In one aspect, a Flight Control System, FCS, flies the drone in a selected spot. In one embodiment, the covering member acts like an overhead covering, and a measuring device provides the FCS information for flying the drone on a holding position over a stationary user. In another embodiment, a measuring device enables the FCS to fly the drone over a non-stationary user and to tracking him. Further, the FCS adjusts the drone position with respect to the position of either the sun or a detected drone in the sky. In another embodiment, a radio control, transmitter receiver, pair is used to communicate user's requests to the FCS. One request may be to turn on the motors.

Claims

1. A shadow casting drone comprising: a drone; and a covering member attached to the drone for casting shadow; whereby the drone flies the covering member and provides an enlarged means for casting shadows conveniently.

2. The shadow casting drone of claim 1, wherein the drone has a flight control system configured to fly the drone in a selected spot.

3. The shadow casting drone of claim 2, wherein a measuring device is added and is configured to provide the flight control system information for flying the drone on a stabilized holding position over a stationary user.

4. The shadow casting drone of claim 3, where the measuring device comprises of at least one of the following sensors: image, sound, IR, ultrasonic, pressure/force, GPS, barometer, gyro, compass, or accelerometer.

5. The shadow casting drone of claim 4, where the flight control system is further configured to make an adjustment in the drone position with respect to the position of the sun based on measurements from the measuring device so that the sun, the drone and the stationary user are generally aligned; whereby a movement of the shadow due to a movement of the sun is offset by the adjustment in the drone position.

6. The shadow casting drone of claim 4, where the flight control system is further configured to make an adjustment in the drone position with respect to the position of a second drone in the sky and the position of the user; whereby the drone moves between the second drone and the user such that the covering member provides a covering for the user against any possible spying cameras on the second drone.

7. The shadow casting drone of claim 2, wherein a measuring device is added and is configured to provide the flight control system information for tracking a non-stationary user.

8. The shadow casting drone of claim 7, where the flight control system is further configured to make an adjustment in the drone position with respect to the position of the sun based on measurements from the measuring device; whereby a movement of the shadow due to a movement of the sun is offset by the adjustment in the drone position.

9. The shadow casting drone of claim 7, where the flight control system is further configured to make an adjustment in the drone position with respect to the position of a second drone in the sky and the position of the non-stationary user; whereby the drone moves between the second drone and the user such that the covering member provides a covering for the user against any possible spying cameras on the second drone.

10. A shadow casting drone comprising: a drone having at least one motor; and a covering member attached to the drone for casting shadow, the covering member having a hole, and a selected motor of the drone is situated so that airflow generated by the selected motor flows through the hole; whereby the drone flies the covering member and provides an enlarged means for casting shadows conveniently.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Some embodiments of the present invention are illustrated as an example and are not limited by the figures of the accompanying drawings, in which like references may indicate similar elements.

[0024] FIG. 1 depicts version 1 of the first embodiment of a shadow casting drone;

[0025] FIG. 2 depicts version 2 of the first embodiment of a shadow casting drone;

[0026] FIG. 3 illustrates the protective properties of the first embodiment pictorially;

[0027] FIG. 4 depicts the second and third embodiments of a shadow casting drone;

[0028] FIG. 5 depicts a block diagram illustrating the measuring device of the second and third embodiment of a shadow casting drone;

[0029] FIG. 6 illustrates the positional adjustment made in response to the position of the sun in the third embodiment pictorially;

[0030] FIG. 7 illustrates the positional adjustment made in response to the position of the unwanted drone in the second embodiment pictorially;

[0031] FIG. 8 depicts the fourth embodiment of a shadow casting drone;

[0032] FIG. 9 depicts a block diagram illustrating the RC transmitter/receiver pair of the fourth embodiment of a shadow casting drone.

[0033] Unless otherwise indicated illustrations in the figures are not necessarily drawn to scale.

[0034] The invention and its various embodiments can now be better understood by turning to the following detailed description wherein illustrated embodiments are described. It is to be expressly understood that the illustrated embodiments are set forth as examples and not by way of limitations on the invention as ultimately defined in the claims.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS OF THE INVENTION

[0035] In the disclosure that follows, in the interest of clarity, not all features of actual implementations are described. It will of course be appreciated that in the development of any such actual implementation, as in any such project, numerous engineering and technical decisions must be made to achieve the developers' specific goals and sub-goals (e.g., compliance with system, technical, and practical constraints), which will vary from one implementation to another. Moreover, attention will necessarily be paid to proper design and engineering practices for the environment in question. It will be appreciated that such development efforts could be complex and time-consuming, outside the knowledge base of typical laymen, but would nevertheless be a routine undertaking for those of ordinary skill in the relevant fields.

First Embodiment

[0036] Referring to FIGS. 1 and 2, versions 1 and 2 of a first embodiment of the shadow casting drone are shown respectively. FIG. 1 illustrates a quadcopter 10 having four motors 11. The motors 11 are affixed to a frame 14. The drone 10 has a flight control system, FCS, 12 and a covering member 13. The four motors 11 are extended outside the covering member 13. Therefore, the covering member 13 does not directly block airflow generated by the motors 11 of the drone 10, preventing loss of motor energy.

[0037] The FCS 12 is configured to fly the drone to a height above a user's head. Referring to FIG. 3, the covering member 13 of the drone 10 blocks the sun's harmful rays from reaching a user 19, and it shields the user 19 against an onlooking drone 30.

[0038] In this disclosure, the term ‘user’ refers to both a person and thing that benefit from the invention. Therefore it may refer to a person, a selected object and a selected spot.

[0039] In more detail, the FCS 12 of the shadow casting drones 10 of the first embodiment first flies the drone 10 to a selected height, next it keeps the drone 10 hovering in a stationary manner. In this position, the covering member 13 of the drone 10 protects anyone standing or sitting under its shadow from the sun's UV lights and from the cameras of other drones.

[0040] FIG. 2 shows version 2 of the first embodiment of the shadow casting drone. A shadow casting drone 20 has a frame 24 and has four motors 11 that are positioned inside four holes 99 in a covering member 23. Therefore, again the covering member 13 does not directly block airflow generated by the motors 11 of the drone 10, preventing loss of motor energy.

[0041] The FCS 12 of the shadow casting drones 20 of version 2 of the first embodiment first fly the drone 20 to a selected height, then it keeps the drones 20 hovering in a stationary manner. In this position, the covering member 23 of the drone 20 protects anyone standing or sitting under its shadow from the sun's UV lights and from the cameras of other drones.

Second Embodiment

[0042] Referring to FIG. 4, a second embodiment of the shadow casting drone is shown. The second embodiment gives a shadow casting drone that protects a stationary user from an unwanted onlooking drone. FIG. 4 shows a quadcopter 32 having four motors 11. The motors 11 are affixed to a frame 14. The drone 32 has a flight control system, FCS, 12 and a covering member 13. The four motors 11 are placed outside the covering member 13.

[0043] The FCS 12 of the shadow casting drones 32 of the second embodiment first flies the drone 32 to a selected height, and then it keeps the drone 32 hovering in a stationary manner. In this position, the covering member 13 of the drone 32 acts as an overhead covering, protecting anyone standing or sitting under its shadow from the cameras of other drones.

[0044] Referring to FIG. 4, the second embodiment further comprises a measuring device 15. The measuring device 15 is configured to provide the FCS 12 information for flying the drone 32 on a stable holding position over a stationary user. The measuring device 15 comprises of at least one of the following sensors: image, IR, ultrasonic, pressure/force, GPS, barometer, gyro, compass, or accelerometer.

[0045] Without the measuring device 15, the FCS 12 cannot prevent the drone 32 from drifting from an initial position due to wind or other disturbance.

[0046] The FCS 12 may use any of the following methods in order to fly the drone 32 on a stable holding position over the stationary user.

[0047] Briefly, with image processing an image sensor data, the FCS 12 may find the direction from the drone 32 toward the stationary user. Then the FCS 12 may make adjustments in the drone 32 position to keep it stable against wind and other disturbances.

[0048] With processing an IR sensor data or an ultrasonic sensor data, the FCS 12 may evaluate the distance to the stationary user and make adjustments in the drone 32 position to keep it stable.

[0049] With processing a GPS, a gyro, a compass, a barometer, or an accelerometer data, the FCS 12 may evaluate small changes in the drone 32 position and make adjustments in the drone 32 position to keep it stable.

[0050] Regarding a pressure/force sensor of a joystick variety, when one end of a string is tied to the sensor and the other end is held by the stationary user, then relative position changes between the drone 32 and the stationary user may be detected by the FCS 12 and may be used to stabilize the drone 32 position with respect to the user.

[0051] FIG. 5 depicts a block diagram explaining the interaction between the FCS 12 and the measuring device 15. Measurements by the measuring device 15 are available to the FCS 12.

[0052] FIG. 7 shows the shadow casting drone 32, a user 40 resting on his/her back, and an unwanted drone 33. In the second embodiment, the FCS 12 of the drone 32 is further configured to make adjustments in the drone position with respect to the position of a detected drone in the sky. Specifically, when the drone 33 is detected overheard, the FCS 12 may move the drone 32 somewhat horizontally away from its general position above the user 40 to better protect the user 40 against any possible spying cameras on the detected drone 33. More specifically referring back to FIG. 7, based on measurements of the measuring device 15, the FCS 12 first approximates the directions of the unwanted drone 33 and the user 40; next it moves the drone 32 somewhat horizontally to generally align the user 40, the drone 32 and the unwanted drone 33. The ZZ′ axis shows this alignment. The alignment of the unwanted drone 33, the drone 32 and the user 40 places the drone 32 between the second drone 33 and the user 40 so that the covering member 13 provides a covering for the user 40 against any possible spying cameras on the second drone 33.

[0053] Additionally, if the drone 33 lowers its elevation in order to move between the drone 32 and the user 40, then the FCS would also lower the elevation of the drone 32 to keep the drone 32 between the user 40 and the drone 33. The FCS will not lower the drone 32 where the drone 32 becomes dangerous to the user 40.

[0054] The FCS 12 may use a sound detector to detect the presence of an unwanted drone and to find the direction from the drone 32 toward the unwanted drone.

Third Embodiment

[0055] Next a third embodiment of the shadow casting drone is explained. This embodiment generalizes the second embodiment in that the second embodiment illustrates the invention for a stationary user, and the third embodiment illustrates the invention for a non-stationary user. The third embodiment has many similarities to the second embodiment. The two embodiments mostly differ in the way they process their measuring devices. To describe the third embodiment, we will use FIGS. 4 and 5 of the second embodiment.

[0056] FIG. 4 shows a quadcopter 32 having four motors 11. The motors 11 are affixed to a frame 14. The drone 32 has a flight control system, FCS, 12 and a covering member 13. The four motors 11 are placed outside the covering member 13.

[0057] Referring to FIG. 4, the third embodiment further comprises a measuring device 15. The measuring device 15 is configured to provide the FCS 12 information for tracking a non-stationary user with the drone 32 and for covering the non-stationary user with the covering member 13. The measuring device 15 comprises of at least one of the following sensors: image, IR, ultrasonic, pressure/force, GPS, barometer, gyro, compass, or accelerometer.

[0058] The FCS 12 of the shadow casting drones 32 of the third embodiment first flies the drone 32 to a selected height and then it has the drone 32 tracking the non-stationary user so that the covering member 13 acts as an overhead covering, protecting the non-stationary user from the sun's UV lights.

[0059] In order to track the non-stationary user, the FCS 12 may use any of the earlier given methods that utilize sensors belonging to the measuring device 15.

[0060] FIG. 5 depicts a block diagram explaining the interaction between the FCS 12 and the measuring device 15. Measurements by the measuring device 15 are made available to the FCS 12 of the third embodiment.

[0061] FIG. 6 shows the shadow casting drone 32, a user 50 walking, and a sun 100. In the third embodiment, the FCS 12 of the drone 32 is further configured to make adjustments in the drone 32 position with respect to the position of the sun 100 in the sky. Specifically, when the sun 100 is not exactly overhead, then the FCS 12 moves the drone 32 somewhat horizontally away from its general position above the user 50 to better protect the user 50. More specifically referring to FIG. 6, based on the measurements of the measuring device 15, the FCS 12 first approximates the directions toward the sun 100 and toward the user 50; next it moves the drone 32 somewhat horizontally to generally align the user 50, the drone 32 and the sun 100. The ZZ′ axis shows this alignment. The alignment of the sun 100, the drone 32 and the user 50 offsets the movements of the shadow due to movements of the sun 100.

[0062] The FCS 12 may find the direction from the drone 32 toward the sun 100 by image processing an image sensor data.

Fourth Embodiment

[0063] A fourth embodiment is presented next. The fourth embodiment is the third embodiment equipped with a RC transmitter/receiver, (TX/RX) pair. FIG. 8 shows the shadow casting drone 32 of the third embodiment equipped with a RC receiver (RX) 16.

[0064] Referring to the block diagram of FIG. 9, a user may send requests to the receiver (RX) 16 with a transmitter (TX) 18. In turn, the receiver (RX) 16 sends the user requests to the FCS 12 of the drone 32. One request may be to turn on the motors 11; other requests may be related to flying the drone 32 from an initial position to where the user is.

[0065] Although we have used quadcopters in the embodiments, the invention is not limited to drones with 4 motors. The quadcopter is used as an example only.

[0066] It is desired that the covering member be of a light weight material. An ultralight fabric would work if the motor frame is rigid enough. Also use of materials with UV protection would enhance the protection capability of the drone against sun's rays.

[0067] Even transparent fabrics with UV protection may be used for the covering member if only protection against the sun's rays is needed.

[0068] The shadow casting drone may be constructed such that it could be folded for storage. One way is to make the covering member of a soft fabric and make the frame collapsible.

[0069] Although much emphasis has been placed on the protective aspect of the shadow generated by the covering member, nevertheless the invention directly applies to situations where a shadow is desired to bring a moment of refreshment.

[0070] As mentioned earlier, in general, the shadow casting drone may provide shade to an object or to a selected spot on the ground as well as to a person. The object or the spot need to be either directly detectable by the measuring device 15, or indirectly detectable through markings we may add, or they could be defined by their GPS coordinates.