WO2021134539A1

WO2021134539A1 - Rotor display

Info

Publication number: WO2021134539A1
Application number: PCT/CN2019/130682
Authority: WO
Inventors: 李庆远
Original assignee: 李庆远
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-07-08

Abstract

Disclosed is a rotor display, which uses visual persistence, to human eyes, of a point light source embedded on a rotor to achieve an air show function.

Description

Rotor display

Field of invention

The invention relates to a rotary wing display, in particular to a device that realizes aerial display by using the point light source embedded on the rotary wing to leave the visual remnants of human eyes.

Background technique

There are some spherical LED displays on the market, which are fixed indoors or outdoors through brackets or suspension cables to display images of the earth. Among them, the LED light source is fixed or rotating. The latter uses the rotating LED point light source to leave the human eye's vision. When the LED point light source moves to a specific position, it turns on or off, so as to achieve the equivalent of ordinary display pixel point lighting. Or turn off the effect.

Japanese telecommunications operator NTT Docomo invented the world's first spherical display drone. The four-axis drone achieves high mobility through the spherical centered four-axis drone, and uses the rotating LED point light source to achieve the effect of aerial display on the human eye. , And is planned to be used in sports events or high-tech concerts, and remind the crowd in emergencies. It is designed for high mobility and can be operated almost anywhere. However, with current technology, battery life is a big obstacle. Although high energy density can be achieved through fuel, the problem is that drones are generally not allowed to fly in densely populated places. If fuel is used, it will be more dangerous.

In addition, the principle of the UAV with a spherical display is only to use the four-axis UAV with the center of the sphere to move the traditional and fixed hoisting spherical LED display. The embodiment needs to solve the problem of the air flow generated by the rotating LED strip and the flying of the UAV. To minimize the structural weight and other technical problems, the live video is extremely noisy. At present, it is only 0.88 meters in diameter. If it is enlarged enough to impress the stadium with tens of thousands or even hundreds of thousands of people, the noise level will be close to that of a manned helicopter, which greatly reduces its practicality, let alone. The danger of an accident. If fuel is used, the plane crashes over a dense crowd, causing a fire at the scene, causing the crowd to panic and large-scale stampede, and its harm is close to a terrorist attack. What's more, the drone itself may be hijacked and used by terrorists.

Summary of the invention

The spherical display drone invented by NTT Docomo must solve the problem that the airflow generated when rotating the LED strip interferes with the rotor of the drone. Why waste the power and energy required to rotate the LED strip? It is conceivable that the point light source embedded on the rotor can be displayed in the air "by the way". For example, wind turbines, all kinds of power, unpowered, tethered aircraft or rotor kits (Gyrokite, rotor kit) that provide lift or thrust through the rotor, can use the point light source embedded on the rotor to realize the display in the air. Features.

In addition, in addition to using existing wind turbines and various rotorcraft, it is also possible to design aircraft specifically for aerial display with a large-diameter horizontal axis (or close to horizontal) and (relatively) low-speed rotorcraft.

However, it should be understood that the content of the present invention may not include all aspects and embodiments of the present invention. The content of the present invention is not meant to be restricted or restricted in any way, and the present invention disclosed herein will be understood by one of the following: The technical staff includes obvious improvements and modifications.

Detailed ways

The present invention will now be described more fully hereinafter. However, the present invention can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. Hopefully, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

It should be understood that various changes can be made to the function and arrangement of elements without departing from the spirit and scope set forth in the appended claims. Therefore, the embodiments are examples or implementations of the present invention, rather than the only implementations. The various appearances of "one embodiment," "an embodiment," or "some embodiments" do not necessarily all refer to the same embodiment. Although various features of the invention may be described in the context of a single embodiment, the features may also be provided individually or in any suitable combination. Conversely, although the invention may be described herein in the context of separate embodiments for the sake of clarity, the invention may also be implemented in a single embodiment or any combination of embodiments.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of related technologies and the present disclosure, and will not be interpreted as idealized or excessive The formal meaning, unless explicitly defined as such in this article.

Reference terms such as "left", "right", "top", "bottom", "front", and "rear" are intended to be used in the implementation of the present invention in relation to the specific features, structures, or orientations of the depicted embodiments example. Obviously, such directional terms regarding the actual use of the device have no specific meaning, because the device can be used by a user or multiple users in multiple directions.

The embodiments of the present invention are mainly described around LED strips. However, embodiments of the present invention are not limited to LED strips. For example, other types of point light sources can also use the rotor display described below to achieve the function of air display.

The spherical display drone invented by NTT Docomo, a Japanese telecommunications operator, is difficult to achieve its anticipated goal of high mobility due to the current limitation of the energy density of the power battery. On the other hand, many real-world applications do not require mobility. Of course, if you don’t need to pay a price, high mobility must be of great significance, but the limitations of the existing technology hinder its commercial pace, not only battery life, noise level and flight control, but also anti-wireless attacks and hijacking. Major difficulties.

The sphere shows the airflow generated when the drone rotates the LED strip, which will interfere with the drone's rotor. Rotating the LED strip is to use the visual residue of the human eye to form the image that needs to be displayed, but it is a waste of power and energy consumption. Naturally, the inventor would think of using the rotation of the LED strip to provide lift or even thrust. It is a straightforward idea to embed a point light source into the rotor of a helicopter. However, since the helicopter's main rotor is close to horizontal rotation, only the vicinity directly below it can have a good viewing effect. And this is not in line with human observation habits-you need to keep your neck up...

Helicopters can be divided into single-rotor helicopters, double-rotor helicopters, and multi-rotor helicopters. The single-rotor helicopter is the most common helicopter, and the representative of the multi-rotor helicopter is the most common four-axis (quad-rotor) UAV. Double-rotor helicopters are divided into the following four types according to the rotor layout:

·Tandem type: The two rotors are arranged longitudinally, such as Boeing's Chinook CH-47

·Horizontal type: The two rotors are arranged horizontally on the left and right, and the rotor shafts are far apart

·Cross type: The two rotors are arranged horizontally on the left and right, and the rotor shafts are closely spaced

·Coaxial: Two rotors are arranged up and down left and right, such as ka-50 of Kamov Design Bureau

Unlike single-rotor helicopters that use the tail rotor or jets to offset the anti-torque generated by the rotors, dual-rotor helicopters both counteract the anti-torque generated by each rotor by rotating the two rotors in opposite directions.

We can refer to the crossed twin-rotor helicopter, but change its rotation axis from close to vertical to close to horizontal, so that it can have a larger side observation area. But if there is only a pair of rotors, only two directions can have a good viewing effect, you can change it to 2, 3 or more pairs of rotors. Its flight control can do this:

· Lifting: Just increase/decrease the rotor speed, or tilt the rotor shaft closer to vertical/horizontal

·Forward/reverse in any direction: increase/decrease the rotation speed of the rotor in any direction, or reverse operation

·Rotation: adjust the speed of a part of the rotor to change the state where the anti-torque cancels each other out

If you refer to the autogyro, because the display surface of the high-speed small rotor for propulsion is too small, and the large rotor that provides lift is not good for viewing in the horizontal plane, you can change the rotation axis of the large rotor to the horizontal plane, but this will result in almost no lift. , While a fixed wing is required to provide lift. In order to reduce the area occupied by the fixed wing, the design of the circular wing aircraft can be used.

This design takes off vertically by placing the rotor in the direction where the axis of rotation is perpendicular to the horizontal plane to reach the cruising altitude, and then tilts the axis of rotation to the direction parallel to the horizontal plane. When landing, then tilt the rotation axis to a vertical landing perpendicular to the horizontal plane.

This design is closer to a propeller-powered fixed-wing aircraft, but uses an oversized propeller for a larger display surface. This will of course increase resistance, but for applications that target display, low speed is better. After all, rapid changes will affect the effect of the display, and we all have the experience of watching a short video many times.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Various changes and modifications according to the claims and specification of the present disclosure are still within the scope of the claimed invention. In addition, each embodiment and claims may not include all the disclosed advantages or special tightening mechanical clamping properties. In addition, the abstract and title are only used to facilitate searching of patent documents and are not intended to limit the scope of the claimed invention in any way.

Claims

A rotary wing display comprising a plurality of point light sources and one or more rotors, and has the following characteristics: each of the rotors contains one or more blades; the point light source is embedded in the blades; the point light source According to instructions, the rotor can be turned on or off when it turns to a specific position, so that the visual residue of the human eye can be used to form an image that needs to be displayed.
A rotary wing display comprising a plurality of point light sources and one or more rotors, and has the following characteristics: each of the rotors contains one or more blades; the point light source is embedded in the blades; the point light source According to instructions, the rotor can be turned on or off when it turns to a specific position, so that the visual residue of the human eye can be used to form an image that needs to be displayed.
The rotor display of claim 2, further comprising one or more fixed wings to provide lift; the wing surface of the fixed wing is parallel to the rotation axis of the rotor.
The rotary wing display of claim 2 has the following characteristics: the rotary wing display takes off vertically by placing the rotary wing in a direction perpendicular to the horizontal plane, and reaches the cruising height, and then tilts the rotation axis to be parallel to In the direction of the horizontal plane, lift is provided by the fixed wing, and thrust is provided by the rotor to achieve level flight; when landing, the rotation axis is then tilted to a direction perpendicular to the horizontal plane to land vertically.
A rotary wing display comprising a plurality of point light sources and one or more rotors, and has the following characteristics: each of the rotors contains one or more blades; the point light source is embedded in the blades; the point light source According to instructions, the rotor can be turned on or off when it rotates to a specific position, so that the visual residue of the human eye can be used to form an image that needs to be displayed.
The rotor display of claim 5, further comprising one or more fixed wings to provide lift; the wing surface of the fixed wing is parallel to the rotation axis of the rotor.
The rotary wing display of claim 5, which has the following characteristics: the rotary wing display takes off vertically by placing the rotary wing in a direction perpendicular to the horizontal plane to reach a cruising height, and then tilts the rotation axis to be parallel to In the direction of the horizontal plane, lift is provided by the fixed wing, and thrust is provided by the rotor to achieve level flight; when landing, the rotation axis is then tilted to a direction perpendicular to the horizontal plane to land vertically.
The rotor display of claim 5, further comprising: one or more tails to balance, stabilize and manipulate the flight attitude of the rotor display; one or more landing gears to support the rotor display to take off and land and park .
A rotor display includes multiple point light sources and multiple rotors, and has the following characteristics: each of the rotors contains one or more blades; the point light sources are embedded in the blades; the point light sources can be based on Instruction, when the rotor turns to a specific position, turn on or turn off, so as to use the visual residue of the human eye to form an image that needs to be displayed.
The rotor display of claim 9, having the following characteristics: the rotor is an even number; every two of the rotors form a pair, and the projection of the rotation axis of each pair of the rotor on the horizontal plane is in the same straight line; The rotation axis of each rotor is close to horizontal, and the rotation direction of each pair of rotors is opposite to cancel the reaction torque generated by the rotors.