LED Tunnel Light with Optical Communication Function and Optical Communication System Based on LED Tunnel Light

Abstract

The present invention provides an LED tunnel light with optical communication function and a visible light communication system based on the LED tunnel light. The LED tunnel light includes: a communication unit, an optical signal receiving unit, a processor unit, a signal modulation unit, an LED controller, and an LED unit. The optical signal receiving unit receives an invisible optical signal carrying information from a vehicle, converts it into an electrical signal, and then sends it to the processor unit; the processor unit accesses the network through the communication unit, sends the information carried by the invisible optical signal to a target receiving end, and receives the reply information fed back by the target receiving end; the processor unit sends the reply information to the signal modulation unit for modulation, and the LED controller encodes the modulated signal into a driving signal for the LED unit to drive the LED unit to emit high-frequency visible light carrying the reply information. In the present invention, the LED tunnel light can complete the interaction between vehicles in the tunnel and external network devices in the tunnel, and can solve the problem of poor signal in the tunnel.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technologies, and specifically to an LED tunnel light with optical communication functions and an optical communication system based on the LED tunnel light. Background Art

[0002] With the popularity of intelligent transportation technologies, current vehicles are equipped with numerous intelligent systems, such as: GPS positioning systems, navigation systems, autonomous driving systems, etc. Currently, all kinds of intelligent systems need to access the telecommunications operator network through the in-vehicle system to achieve networking and obtain dynamic data. When a vehicle passes through a long tunnel or a tunnel in a remote area, since there is no telecommunications operator signal in the tunnel, the in-vehicle system of the vehicle will be offline for a long time, which will affect the use of the intelligent system. Due to space limitations in the tunnel, it is not feasible to build a base station in the tunnel.

[0003] Currently, the lighting in tunnels is basically based on LED tunnel lights. If the LED tunnel lights can be modified to act as intermediate proxy nodes to complete the interaction between vehicles in the tunnel and external network devices in the tunnel, the problem of poor signal in the tunnel and limited use of intelligent systems can be well solved. Summary of the Invention

[0004] Object of the Invention: The present invention aims to provide an LED tunnel light with optical communication functions and an optical communication system based on the LED tunnel light, which can realize the interaction between vehicles in the tunnel and external network devices in the tunnel.

[0005] Technical Solution: To achieve the above object, on the one hand, the present invention proposes an LED tunnel light with optical communication functions for optical communication with vehicles in the tunnel. The LED tunnel light includes a communication unit, an optical signal receiving unit, a processor unit, a signal modulation unit, an LED controller, and an LED unit;

[0006] The optical signal receiving unit is used to receive the optical signal carrying information from the vehicle, and then convert the optical signal into an electrical signal and send it to the processor unit; the processor unit accesses the network through the communication unit, sends the information carried by the optical signal to the target receiving end, and receives the reply information fed back by the target receiving end; the processor unit sends the reply information to the signal modulation unit, and the signal modulation unit generates a carrier wave and modulates the reply information onto the carrier wave and sends it to the LED controller; the LED controller encodes the modulated signal into a driving signal for the LED unit, and drives the LED unit to emit high-frequency visible light carrying the reply information.

[0007] Further, the LED tunnel light further includes a power supply unit for supplying power to other units of the LED tunnel light.

[0008] Further, the frequency of the high-frequency visible light is greater than 1 MHz.

[0009] On the other hand, the present invention also proposes an optical communication system based on an LED tunnel lamp, including the LED tunnel lamp and a vehicle-mounted communication terminal;

[0010] The vehicle-mounted communication terminal includes: a processor, and an optoelectronic signal transceiver, a communication module, and a human-computer interaction module respectively connected to the processor; the processor accesses the Internet through a communication unit and interacts with a user through the human-computer interaction module. When receiving a network switching instruction from the user, the processor controls the communication unit to disconnect the original network connection and simultaneously enables optical communication for data transmission. Among them,

[0011] The data sending process is as follows: the processor sends a message to be sent to the optoelectronic signal transceiver, and the optoelectronic signal transceiver modulates the message to be sent into an optical signal for transmission;

[0012] The data receiving process is as follows: the optoelectronic signal transceiver receives the optical signal fed back by the LED tunnel lamp, converts the optical signal into an electrical signal through an optoelectronic conversion module, and then performs filtering, shaping, amplification, and demodulation in sequence. Finally, the demodulated signal is sent to the processor for processing, and the processor feeds back the processed result to the human-computer interaction module for display.

[0013] Specifically, the communication module includes: a 3G module, a 4G module, a 5G module, and a Bluetooth module.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0015] 1. The LED light source has a short response time, a long lifespan, and no radiation, and all LED tunnel lamps can become Internet base stations.

[0016] 2. The construction cost is low and energy-saving. Visible light communication has extremely high energy utilization efficiency. Its communication power only accounts for about 5% of the lighting power. Its signal is emitted by the LED tunnel lamp, and the transmission is simple and the equipment cost is low.

[0017] 3. Currently, the optical communication speed can reach a high speed of hundreds of megabits per second, and the spectral width is also much larger than that of communication electromagnetic waves.

[0018] 4. The optical communication signal is different from the radio frequency signal in traditional wireless communication, is harmless to the human body, and will not cause electromagnetic interference to other devices. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the tunnel scene involved in the embodiment;

[0020] Figure 2 It is a functional structure diagram inside the tunnel lamp involved in the embodiment;

[0021] Figure 3 This is the internal functional structure of the vehicle-mounted communication terminal involved in the embodiment. Specific implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0026] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] Embodiment 1:

[0028] This embodiment provides an LED tunnel light with optical communication function, which is used for optical communication with vehicles in the tunnel. The internal functional structure of the LED tunnel light is as follows Figure 2 shown, including a communication unit, an optical signal receiving unit, a processor unit, a signal modulation unit, an LED controller, and an LED unit;

[0029] The optical signal receiving unit is used to receive the optical signal carrying information from the vehicle, and then convert the optical signal into an electrical signal and send it to the processor unit; the processor unit accesses the network through the communication unit, sends the information carried by the optical signal to the target receiving end, and receives the reply information fed back by the target receiving end; the processor unit sends the reply information to the signal modulation unit, and the signal modulation unit generates a carrier wave and modulates the reply information onto the carrier wave and sends it to the LED controller; the LED controller encodes the modulated signal into a driving signal for the LED unit, and drives the LED unit to emit high-frequency visible light carrying the reply information.

[0030] The optical signal receiving unit can adopt common optical receivers on the market. The optical receiver can receive the optical signal from the downlink and convert the optical signal into an electrical signal. The LED tunnel light further includes a power supply unit, and the power supply unit is used to supply power to other units of the LED tunnel light. The power supply unit can be a battery or a circuit device that can directly draw power from the power supply circuit of the tunnel light.

[0031] Existing LED tunnel lights usually have a dimming control mechanism to adjust the brightness of the tunnel lights according to the light outside the tunnel to achieve the purpose of energy saving. For the LED tunnel light described in this embodiment, normal energy-saving dimming of the LED tunnel light will not affect the optical communication of the vehicle, because the principle of optical communication is to detect the rapid change of light intensity and will not be affected by the slow change of normal lighting slow dimming. The constant light can be filtered out by the receiver. The LED light used for transmitting information after modulation changes at a very fast rate, and the lowest frequency is 1 MHz, which is 10,000 times higher than the refresh frequency of the computer screen. The human eye simply cannot detect its flicker, so it has no impact on the normal and safe driving of the driver.

[0032] This embodiment also provides an optical communication system based on the LED tunnel light, including the described LED tunnel light and a vehicle-mounted communication terminal;

[0033] The internal functional structure of the vehicle-mounted communication terminal is as follows Figure 3 shown, including: a processor and an optoelectronic signal transceiver, a communication module, and a human-computer interaction module respectively connected to the processor; the processor accesses the Internet through the communication unit and interacts with the user through the human-computer interaction module. When receiving the user's network switching instruction, the processor controls the communication unit to disconnect the original network connection and simultaneously enables the optical communication method for data transmission, where

[0034] The data sending process is as follows: The processor sends the message to be sent to the optoelectronic signal transceiver, and the optoelectronic signal transceiver modulates the message to be sent into an optical signal for transmission.

[0035]

[0034] The data receiving process is as follows: The optoelectronic signal transceiver receives the optical signal fed back by the LED tunnel lights, converts the optical signal into an electrical signal through the optoelectronic conversion module, and then performs filtering, shaping, amplification, and demodulation in sequence. Finally, the demodulated signal is sent to the processor for processing, and the processor feeds back the processed result to the human-computer interaction module for display.

[0036] In the optical communication system, the communication module includes: a 3G module, a 4G module, a 5G module, and a Bluetooth module.

[0037] Figure 1

[0035] Figure 1 shows the scenario where a vehicle enters a tunnel. In this scenario, all LED tunnel lights can be optical communication terminals. However, to reduce costs, the LED tunnel lights that can be used for optical communication can be deployed at intervals according to the actual lamp spacing and light irradiation range of the tunnel lights in the tunnel. Blind spots should be avoided during the layout.

[0038] After the vehicle-mounted communication terminal enters the tunnel, the user can directly issue a network switching instruction through the human-computer interaction module. At this time, the vehicle-mounted communication terminal establishes a new communication link with the external network through the LED tunnel lights. The LED tunnel lights emit visible light to carry information, while the vehicle-mounted communication terminal uses invisible light to carry information, including but not limited to invisible light such as infrared and ultraviolet.

[0039]

[0036] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An LED tunnel light with optical communication function, which is used for optical communication with vehicles in the tunnel, is characterized in that, It includes a communication unit, an optical signal receiving unit, a processor unit, a signal modulation unit, an LED controller, and an LED unit; The optical signal receiving unit is used to receive the invisible optical signal carrying the vehicle's on-board information, and then convert the invisible optical signal into an electrical signal and send it to the processor unit; the processor unit accesses the network through the communication unit, sends the information carried by the invisible optical signal to the target receiving end, and receives the reply information fed back by the target receiving end; the processor unit sends the reply information to the signal modulation unit, and the signal modulation unit generates a carrier wave and modulates the reply information onto the carrier wave and sends it to the LED controller; the LED controller encodes the modulated signal into a driving signal for the LED unit to drive the LED unit to emit high-frequency visible light carrying the reply information; It further includes a power supply unit, and the power supply unit is used to supply power to other units of the LED tunnel light; The frequency of the high-frequency visible light is greater than 1 MHz.

2. The optical communication system based on the LED tunnel lamp is characterized in that, It includes the LED tunnel light described in Claim 1 and a vehicle-mounted communication terminal; The vehicle-mounted communication terminal includes: a processor, and an optoelectronic signal transceiver, a communication module, and a human-computer interaction module respectively connected to the processor; the processor accesses the Internet through the communication unit and interacts with the user through the human-computer interaction module. When receiving the user's network switching instruction, the processor controls the communication unit to disconnect the original network connection and simultaneously enables optical communication for data transmission. Among them, The data sending process is: the processor sends the message to be sent to the optoelectronic signal transceiver, and the optoelectronic signal transceiver modulates the message to be sent into an invisible optical signal and sends it; The data receiving process is: the optoelectronic signal transceiver receives the visible light signal fed back by the LED tunnel light, converts the visible light signal into an electrical signal through the optoelectronic conversion module, and then performs filtering, shaping, amplification, and demodulation in sequence. Finally, the demodulated signal is sent to the processor for processing, and the processor feeds back the processed result to the human-computer interaction module for display.

3. The optical communication system based on the LED tunnel lamp according to claim 2, wherein, The communication module includes: a 3G module, a 4G module, a 5G module, and a Bluetooth module.

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