An omnidirectional visible light communication device

Abstract

The application relates to an omnidirectional visible light communication device, which comprises a reflector (1) and a reflecting bowl (2), the reflector (1) is located above the reflecting bowl (2) and the two have a common central axis; the reflector (1) is of a solid structure, the upper surface is a circular plane, the lower surface is a convex parabolic curved surface, the lower surface is mirror-polished and is coated with a reflecting film with a reflectivity greater than 90%; the reflecting bowl (2) is designed in a parabolic curved surface and is provided with a hole in the bottom center, the shape of the hole is circular; the reflecting bowl (2) is provided with a focusing lens group (3) at the position of the hole in the bottom center, a detector circuit board (4) is arranged below the focusing lens group (3), the detector circuit board (4) is provided with photosensitive detectors for converting optical signals into electrical signals, and the detector circuit board (4) is connected with a transceiving and processing circuit board (5) through wires. The application is not limited by the existing directivity problem any more, and direct communication is realized without aiming.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of visible light communication and relates to an omnidirectional visible light communication device. BACKGROUND

[0002] Visible light communication (VLC) refers to a communication mode in which light in a visible light band is used as an information carrier to directly transmit optical signals in air.

[0003] Visible light communication is green and low-carbon, can realize nearly zero-energy-consumption communication, and can effectively avoid the weaknesses of radio communication electromagnetic signal leakage, etc., and quickly build a safe information space resistant to interference and interception. In the future, visible light communication will also be interactively integrated with communication technologies such as WiFi, cellular networks (3G, 4G, and even 5G), etc., and will bring innovative applications and value experiences in the fields of Internet of Things, smart cities (home), aviation, navigation, subway, high-speed rail, indoor navigation, and underground operation, etc. However, the existing optical communication can only be directional communication, and both parties must keep facing forward at all times, which seriously limits its range of use and convenience.

[0004] As shown in Figure 4 The conventional lens or reflecting bowl is physically limited and can only collect light beams in a direction of about 30° (as known in the art, 30° refers to the vertical light in the middle, and the center point of the photosensitive detector is the fulcrum, which is inclined by 30°, that is, the angle with the original vertical line is 30°) of the photosensitive detector. Larger angle light beams are blocked or reflected out of the reflecting bowl and cannot be collected.

[0005] In view of the above, it is urgent to study an omnidirectional visible light communication device. SUMMARY

[0006] The purpose of the present application is to solve the above-mentioned problems existing in the prior art and provide an omnidirectional visible light communication device.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0008] An omnidirectional visible light communication device comprises a reflector and a reflecting bowl, the reflector is located above the reflecting bowl and has a common central axis with the reflecting bowl;

[0009] The lower surface of the reflector is a convex parabolic curved surface, the lower surface is mirror polished and coated with a reflective film with a reflectivity greater than 90%; the reflecting bowl is designed with a parabolic curved surface and a central hole at the bottom, and the central hole at the bottom is a through hole;

[0010] The position of the central opening of the bottom of the reflecting bowl is provided with a focusing lens group, and a detector circuit board is arranged below the focusing lens group, the detector circuit board is provided with a photosensitive detector for converting optical signals into electrical signals, the detector circuit board is connected with a transceiving processing circuit board through wires, the transceiving processing circuit board transmits the received electrical signals to a user through a user interface after processing, the user sends user data to the transceiving processing circuit board through the user interface, the transceiving processing circuit board converts the user data into light source driving information, and drives the visible light source (LED or laser) to send the user information.

[0011] As a preferred technical scheme:

[0012] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0013] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0014] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0015] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0016] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0017] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0018] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0019] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0020] The omnidirectional visible light communication device has the advantages that the reflector is of a solid structure, and the upper surface is a circular plane.

[0021] The omnidirectional visible light communication device of the present application comprises a reflector and a reflecting bowl, the reflector is a convex curved surface reflector, which can reflect the light beam in the direction of 90° with the photosensitive detector into the reflecting bowl, and then into the focusing lens group after 2 times of reflection. The reflector can reflect the light around the reflector 360° into the reflecting bowl, and the focusing lens group converges the light in different directions to the center of the photosensitive detector. In this way, the light beam which is 90° with the photosensitive detector and around the reflector 360° can finally be incident to the center of the photosensitive detector, realizing the collection of light beams with large viewing angle, and the light beam is modulated into optical signal, and then information can be received, overcoming the defect that only directional communication can be realized in the prior art.

[0022] Advantages:

[0023] (1) The omnidirectional visible light communication device of the present application has simple structure and is easy to operate.

[0024] (2) The omnidirectional visible light communication device of the present application can realize omnidirectional visible light communication, and is no longer limited by the existing directivity problem, and truly realizes direct communication without aiming. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 and Figure 2 is a schematic view of the omnidirectional visible light communication device of the present application;

[0026] Figure 3 is a light beam collection schematic view of the omnidirectional visible light communication device of the present application;

[0027] Figure 4 is a traditional reflecting bowl light beam collection schematic view;

[0028] Among them, 1 is a reflector, 2 is a reflecting bowl, 3 is a focusing lens group, 4 is a detector circuit board, 5 is a transceiver processing circuit board, 6 is a visible light source, 7 is a fixed support, and 8 is a supporting base. DETAILED DESCRIPTION

[0029] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various modifications or modifications to the present application, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0030] As Figure 1 and Figure 2As shown, an omnidirectional visible light communication device includes a reflector 1 and a reflector bowl 2. The reflector 1 is located above the reflector bowl 2, and the two share a central axis. The reflector 1 is a solid structure made of glass, metal, or plastic. Its upper surface is a circular plane, and its lower surface is a convex parabolic curved surface. The lower surface is mirror-polished and coated with a reflective film with a reflectivity greater than 90%. The reflective film is made of aluminum or chromium. The reflector bowl 2 adopts a parabolic curved surface design and has a through hole at the bottom center. The hole is circular. The upper surface of the reflector 1 is attached to a fixed bracket 7, which is made of a transparent arc-shaped material. The reflector bowl 2 and the fixed bracket 7 are supported and fixed by a support base 8. The diameter of the upper surface of the reflector 1 is 1.2 to 1.8 times the diameter of the bottom center opening of the reflector bowl 2. 2. The diameter of the bottom center opening is 8-10mm and the depth is less than 10mm. The curvature of the lower surface of the reflector 1 and the curvature of the bottom arc surface of the reflector bowl 2 do not differ by more than 10%. The distance between the center of the lower surface of the reflector 1 and the position of the bottom center opening of the reflector bowl 2 is the focal length of the reflector bowl 2. The height of the reflector bowl is 0.2-0.4 times the focal length of the reflector bowl 2. A focusing lens group 3 is provided at the bottom center opening of the reflector bowl 2. A detector circuit board 4 is provided below the focusing lens group 3. The detector circuit board 4 has a photosensitive detector for converting light signals into electrical signals. The detector circuit board 4 is connected to the transceiver processing circuit board 5 through wires. The focusing lens group 3 consists of 6 lenses arranged vertically. The diameter of the lenses is 1.2-1.8 times the diameter of the bottom center opening of the reflector bowl 2.

[0031] like Figure 3 As shown, reflector 1 is responsible for collecting light rays in a 360° horizontal direction around reflector 1, reflector bowl 2 is responsible for collecting light rays directly in front of the opening of reflector bowl 2, focusing lens group 3 is responsible for focusing the collected light signals onto the photosensitive detector, the photosensitive detector on the detector circuit board 4 converts the light signals into electrical signals, the transceiver processing circuit board 5 processes the received electrical signals and transmits them to the user through the user interface, the user sends information to the transceiver processing circuit board 5 through the user interface, the transceiver processing circuit board converts the user information into light source driving information, and drives the visible light source 6 to send the user information.

Claims

1. An omni-directional visible light communication apparatus, characterized by: The reflector (1) is located above the reflecting bowl (2) and they share a central axis; The reflector (1) is of solid structure without axial through hole; the upper surface of the reflector (1) is circular plane, and the lower surface is convex parabolic curved surface, which is mirror polished and coated with reflective film with reflectivity greater than 90%; the reflecting bowl (2) is designed with parabolic curved surface and central bottom hole, which is through hole; The opening of the reflecting bowl (2) is upward; the focusing lens group (3) is arranged at the central bottom hole of the reflecting bowl (2); the detector circuit board (4) is arranged below the focusing lens group (3) and has photosensitive detector for converting optical signal into electrical signal; the detector circuit board (4) is connected with the transceiver processing circuit board (5) through wires; The distance between the central lower surface of the reflector (1) and the upper end of the central bottom hole of the reflecting bowl (2) is the focal length of the reflecting bowl (2); the height of the reflecting bowl is 0.2-0.4 times of the focal length of the reflecting bowl (2); The material of the reflector (1) is glass; The upper surface of the reflector (1) is adhered to the fixed support (7), which is transparent arc-shaped material.

2. The omnidirectional visual light communication device of claim 1, wherein, The central bottom hole of the reflecting bowl (2) is circular.

3. The omnidirectional visible light communication apparatus according to claim 2, wherein The reflecting bowl (2) and the fixed support (7) are supported and fixed by the supporting base (8).

4. The omnidirectional visual light communication apparatus according to claim 3, wherein The diameter of the upper surface of the reflector (1) is greater than that of the central bottom hole of the reflecting bowl (2), and the curvature of the lower surface of the reflector (1) is not more than 10% different from that of the arc surface of the reflecting bowl (2).

5. The omnidirectional visible light communication apparatus according to claim 4, wherein The diameter of the upper surface of the reflector (1) is 1.2-1.8 times of that of the central bottom hole of the reflecting bowl (2), the diameter of the central bottom hole of the reflecting bowl (2) is 8-10 mm, and the depth is less than 10 mm.

6. The omnidirectional visible light communication apparatus according to claim 5, wherein The focusing lens group (3) is composed of 6 lenses arranged in upper and lower rows, and the diameter of the lens is 1.2-1.8 times of that of the central bottom hole of the reflecting bowl (2).

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