Visible light communication system based on electronic marking

Abstract

The invention discloses a visible light communication system based on electronic marking lines, which is a system for transmitting traffic information through the electronic marking lines arranged on a road surface, and comprises a plurality of luminous electronic marking lines and a recognition device, the plurality of electronic marking lines are arranged on the road surface and form a luminous traffic marking line in a splicing combination mode, the electronic marking line is configured to emit a visible light signal modulated based on target information, the recognition device is configured to receive the visible light signal and obtain the target information based on the visible light signal, and the target information is traffic information represented by a plurality of traffic signs matched with the traffic marking line. Therefore, the visible light communication system which transmits the information represented by the traffic sign in a visible light communication mode by utilizing the luminous characteristic of the electronic marking line can be provided.

Description

Technical Field

[0001] The present disclosure generally relates to the field of optical communication technology, and more particularly to a visible light communication system based on electronic markings. Background Art

[0002] Electronic road markings are luminous three-dimensional road markings. Generally speaking, electronic road markings can be embedded in the road surface, and multiple electronic road markings embedded in the road surface can be spliced ​​together to form road traffic markings. In terms of controlling and guiding road traffic, electronic road markings have incomparable advantages over traditional road traffic markings. For example, electronic road markings have the function of autonomous and controllable luminescence, which makes electronic road markings visible day and night, especially in severe weather conditions, and still have good recognition, thereby improving the role of guiding, indicating or warning restrictions on road traffic.

[0003] Traffic signs are road facilities that use words or symbols to convey information such as guidance, restrictions, warnings or instructions. Traffic signs are usually three-dimensional structures and are suspended in the air above or on the side of the road. Traffic signs play an important role in guiding and regulating road traffic.

[0004] However, once encountering severe weather conditions such as haze, fog, dust, or rainstorms, severe weather will reduce atmospheric transparency, making outdoor road visibility worse. Since electronic road markings can be illuminated, they still have good recognition in severe weather conditions, ensuring the role of guiding, indicating or warning road traffic; however, since traffic signs cannot be illuminated, their recognition is low and they are not easy to be seen clearly by the human eye, especially, they are not easy to be accurately seen and interpreted by traffic participants (such as motor vehicle drivers), making it difficult for traffic signs to play their role in guiding and regulating road traffic, which is not conducive to driving safety and increases the risk of accidents. Summary of the invention

[0005] The present disclosure is proposed in view of the above-mentioned situation, and aims to provide a visible light communication system based on electronic markings, which utilizes the luminous characteristics of electronic markings to transmit the information represented by traffic signs in a visible light communication manner so that traffic participants can accurately obtain and interpret it.

[0006] To this end, the present disclosure provides a visible light communication system based on electronic markings, which is a system for transmitting traffic information through the electronic markings set on the road surface, including: a plurality of luminous electronic markings, and an identification device, wherein the plurality of electronic markings are set on the road surface and are formed into luminous traffic markings by splicing and combining, the electronic markings are configured to emit visible light signals modulated based on target information, and the identification device is configured to receive the visible light signals and obtain the target information based on the visible light signals, wherein the target information is traffic information represented by a plurality of traffic signs matching the traffic markings.

[0007] In the present disclosure, a plurality of electronic markings are arranged on the road surface and formed into luminous traffic markings by splicing and combining, so that the traffic markings can have the function of autonomous and controllable luminescence, and the luminous traffic markings can better play the role of traffic marking path pointing and guiding traffic at night or under bad weather conditions. In addition, the electronic markings are configured to emit visible light signals modulated based on target information, so that the luminous traffic markings can have the functions of lighting and transmitting information at the same time, so that the information represented by the traffic sign can be transmitted by the luminous characteristics of the electronic markings in the form of visible light communication, and the traffic participants can obtain the information represented by the traffic sign by receiving the visible light signal through the identification device and processing the visible light signal. In this case, compared with the existing radio communication method, the visible light communication method has the advantages of rich spectrum resources, high transmission rate, and no electromagnetic interference. The target information is transmitted by the electronic markings in the visible light communication method so that the traffic participants can obtain the target information through the identification device. The visible light communication between the electronic markings and the identification device has a high transmission rate, does not generate electromagnetic interference, and has no license requirements, and can be used without a license, thereby lowering the threshold for use and facilitating promotion and implementation.

[0008] In addition, in the visible light communication system involved in the present disclosure, optionally, a server is further included that communicates with the plurality of electronic markings via an access network device, and the server is configured to remotely control the luminous states of the plurality of electronic markings via the access network device to control the luminous states of the traffic markings. Thus, the luminous states of the traffic markings can be remotely controlled.

[0009] In addition, in the visible light communication system involved in the present disclosure, optionally, the traffic marking includes a plurality of marking segments corresponding to the traffic signs, and the marking segments include at least one electronic marking. In this case, the corresponding relationship between the marking segments and the traffic signs can facilitate the traffic marking to clearly and accurately convey different target information.

[0010] In addition, in the visible light communication system of the present disclosure, optionally, the length of the line segment is smaller than the interval between the traffic signs, thereby preventing the line segments corresponding to different traffic signs from overlapping.

[0011] In addition, in the visible light communication system involved in the present disclosure, optionally, the electronic marking line is set on the road surface in a manner of being embedded in the road surface and flush with the road surface. In this case, the electronic marking line can be made coplanar with the road surface, thereby reducing the wear of the electronic marking line caused by the load of the moving object (such as a vehicle). In addition, the driving safety of the moving object can be improved.

[0012] In addition, in the visible light communication system involved in the present disclosure, optionally, the electronic marking line includes a storage unit, a light emitting unit, a modulation unit, and a control unit, the storage unit is configured to store the target information, the modulation unit is configured to generate a modulation signal based on the target information, and the control unit is configured to drive the light emitting unit to emit the visible light signal based on the modulation signal. In this case, the modulation signal is generated based on the target information, and the visible light is modulated using the modulation signal to generate a visible light signal, so that the visible light can carry the target information, thereby enabling the visible light to be used as an information carrier to transmit the target information.

[0013] In addition, in the visible light communication system involved in the present disclosure, optionally, the control unit is configured to control the light emitting unit to turn on or off, and adjust the brightness or color of the visible light signal emitted by the light emitting unit. Thus, it is convenient to control the working process and working mode of the light emitting unit.

[0014] In addition, in the visible light communication system involved in the present disclosure, optionally, the identification device is arranged on the mobile object, and the identification device includes a photoelectric conversion unit, and the photoelectric conversion unit is configured to receive the visible light signal and demodulate the visible light signal to obtain the target information. In this case, the visible light signal can be converted into an electrical signal by the photoelectric conversion unit, and the target information can be obtained by processing the electrical signal.

[0015] In addition, in the visible light communication system involved in the present disclosure, optionally, the identification device further includes a lens unit, and the lens unit can be used to focus the visible light signals of various incident directions. Thus, the receiving efficiency of the photoelectric conversion unit (such as a photodetector) for the visible light signal can be improved.

[0016] In addition, in the visible light communication system involved in the present disclosure, optionally, the recognition device further includes a prompt unit, and the prompt unit is configured to transmit the target information by way of text display or voice broadcast. In this case, it is convenient for traffic participants to obtain the information represented by the traffic sign. In addition, even if the traffic participants cannot understand the information represented by the traffic sign, the information represented by the traffic sign can be accurately understood by the traffic participants through easy-to-understand methods such as voice or text.

[0017] According to the present disclosure, a visible light communication system based on electronic markings can be provided, which utilizes the luminous characteristics of electronic markings to transmit the information represented by traffic signs in a visible light communication manner so that traffic participants can accurately obtain and interpret it. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, the present disclosure will be further described in detail by way of examples with reference to the accompanying drawings, in which:

[0019] Figure 1 It is a schematic diagram showing an application scenario of the visible light communication system involved in the example of the present disclosure.

[0020] Figure 2 is a block diagram showing the composition of a visible light communication system involved in the example of the present disclosure.

[0021] Figure 3A Schematic diagram showing traffic markings and marking segments involved in the examples of the present disclosure.

[0022] Figure 3B Schematic diagram showing a plurality of different traffic signs involved in the examples of the present disclosure.

[0023] Figure 4 1 is a schematic diagram showing the overall structure of the electronic marking line involved in the example of the present disclosure.

[0024] Figure 5 Schematic diagram showing a light emitting layer and a shell according to an example of the present disclosure.

[0025] Figure 6 is a block diagram showing the composition of the light-emitting layer involved in the example of the present disclosure.

[0026] Figure 7 is a schematic diagram showing a cross section of an electronic marking line involved in an example of the present disclosure.

[0027] Figure 8 Schematic diagram showing the sequential stacking of a surface wear-resistant layer, a pressure-resistant layer and a light-emitting layer involved in the example of the present disclosure.

[0028] Fig. 9 Schematic diagram showing a surface wear-resistant layer according to an example of the present disclosure.

[0029] Fig.10 Schematic diagram showing a pressure-resistant layer according to an example of the present disclosure.

[0030] Fig.11 2 is a block diagram showing the composition of the identification device involved in the example of the present disclosure.

[0031] Description of reference numerals:

[0032] Visible light communication system...1,

[0033] Electronic marking line ... 10, housing ... 11, receiving chamber ... 110, opening ... 112,

[0034] Light-emitting layer...12, storage unit...122, light-emitting unit...124, modulation unit...126, control unit...128, surface wear-resistant layer...14, reflective material...142, pressure-resistant layer...16, first transparent plastic layer...162, tempered glass layer...164, second transparent plastic layer...166, traffic marking...20, marking segment...22, identification device...30, photoelectric conversion unit...32, lens unit...34, pre-processing unit...36, prompt unit...38, server...40, traffic sign...5, moving object...6, direction of passage...D1, direction of opening toward the accommodating chamber...D2. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0036] It should be noted that the terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices. In the following description, the same symbols are given to the same components, and repeated descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratio of the sizes of the components to each other or the shapes of the components may be different from the actual ones.

[0037] The present disclosure relates to a visible light communication system based on electronic markings, which is a system that transmits traffic information represented by traffic signs through electronic markings set on the road surface. In addition, the visible light communication system based on electronic markings involved in the present disclosure can also be referred to as a visible light communication system, and the electronic markings can also be referred to as luminous markings or luminous electronic markings.

[0038] The visible light communication system involved in the present disclosure is described below with reference to the accompanying drawings.

[0039] Figure 1 It is a schematic diagram showing an application scenario of the visible light communication system 1 involved in the example of the present disclosure.

[0040] In this disclosure, see Figure 1 The visible light communication system 1 can use the electronic marking line 10 to transmit the traffic information represented by the traffic sign 5 in the form of visible light communication. When the traffic sign 5 is not easy to be seen clearly by the human eye, traffic participants (such as people in the moving object 6) can accurately obtain and interpret the traffic information represented by the traffic sign 5.

[0041] In some examples, the traffic information represented by the traffic sign 5 may include guidance, restriction, warning, and instruction information conveyed by the traffic sign 5 through text or symbols.

[0042] In some examples, the traffic participant may be a driver of a motor vehicle, a driver of a non-motor vehicle, an unmanned vehicle, or a pedestrian, etc.

[0043] Figure 2 1 is a block diagram showing the composition of the visible light communication system 1 involved in the example of the present disclosure.

[0044] For some examples, see Figure 2 The visible light communication system 1 may include a plurality of luminous electronic marking lines 10 and an identification device 30 ( Figure 2 The first to Nth electronic marking lines 10 are schematically shown. The electronic marking line 10 can be connected to the identification device 30 by visible light communication.

[0045] In some examples, the electronic marking line 10 may be a luminous marking line having a three-dimensional structure.

[0046] In some examples, the electronic marking line 10 can emit visible light in an autonomous and controllable manner. Further, the electronic marking line 10 can modulate the visible light it emits to generate a visible light signal carrying data.

[0047] In some examples, the recognition device 30 may be configured to receive a visible light signal and obtain data based on the visible light signal. Specifically, the recognition device 30 may receive a visible light signal emitted by the electronic marking line 10 and may decode the visible light signal to obtain data carried by the visible light signal.

[0048] Figure 3A 2 is a schematic diagram showing a traffic marking line 20 and a marking line segment 22 involved in an example of the present disclosure. Figure 3B is a schematic diagram showing a plurality of different traffic signs 5 involved in the examples of the present disclosure.

[0049] For some examples, see Figure 3A A plurality of electronic marking lines 10 can be arranged on the road surface, and a plurality of electronic marking lines 10 arranged on the road surface can be spliced ​​and combined to form a luminous traffic marking line 20 ( Figure 3A The schematic diagram shows that a plurality of electronic markings 10 are combined to form a dotted traffic marking. In this case, the traffic marking 20 can have the function of autonomous controllable lighting, and the luminous traffic marking 20 can better play the role of the traffic marking 20 in pointing and guiding traffic at night or under severe weather conditions.

[0050] In some examples, multiple electronic markings 10 can be set on the road surface in a manner of being embedded in the road surface. Further, the electronic markings 10 can be set on the road surface in a manner of being embedded in the road surface and flush with the road surface. In this case, the electronic markings 10 can be made coplanar with the road surface, thereby reducing the wear of the electronic markings 10 caused by the load of the moving object 6 (such as a vehicle).

[0051] In some examples, the luminous traffic markings 20 may include, for example, solid lines, dashed lines, double solid lines, double dashed lines, etc. ( Figure 3B The solid line and the dotted line formed by combining a plurality of electronic markings 10 are schematically shown. In this case, the traffic markings 20 formed by the plurality of electronic markings 10 can divide the road space to form a plurality of lane lines, thereby guiding the road traffic.

[0052] In some examples, the visible light emitted by the electronic marking 10 may be color-adjustable visible light. In this case, by adjusting the color of the visible light of the electronic marking 10, multiple types of luminous traffic markings 20 can be obtained, so that the visible light communication system 1 can switch the type of luminous traffic markings 20 according to actual needs (for example, the need to guide traffic according to road condition information). For example, a plurality of electronic markings 10 emitting white visible light can be combined to form traffic markings 20 such as white dashed lines, white solid lines, double white dashed lines, and double white solid lines. For another example, a plurality of electronic markings 10 emitting yellow visible light can be combined to form traffic markings 20 such as yellow dashed lines, yellow solid lines, yellow dashed and solid lines, and double yellow solid lines.

[0053] In some examples, when a plurality of electronic markings 10 are combined to form a traffic marking 20, the traffic marking 20 can be used as a lane line to form a light-emitting lane line, and the light-emitting lane line can be used as a speed reference line. For example, the light-emitting lane line can continuously emit yellow visible light, and a vehicle can travel between two lane lines emitting yellow visible light. In this case, by using two light-emitting lane lines as speed reference lines, a reference system can be provided for traffic participants under severe weather conditions (such as dust or haze weather), thereby improving the safety of road traffic under severe weather conditions.

[0054] For some examples, see Figure 2 The visible light communication system 1 may include a server 40, and the server 40 may communicate with a plurality of electronic marking lines 10 via an access network device.

[0055] In some examples, access network devices may include networks or devices connected via wired lines, such as Public Switched Telephone Networks (PSTN), Digital Subscriber Lines (DSL), digital cable, direct cable, etc.

[0056] In other examples, the access network device may include a network or device connected via a wireless network, such as a wireless connection via a cellular network, a wireless local area network (WLAN), a digital television network such as a digital video broadcast-handheld (DVB-□H) network, or a satellite network.

[0057] In some examples, the server 40 may be configured to control the luminous state of the traffic marking 20. Specifically, the server 40 may remotely control the luminous state of multiple electronic markings 10 by accessing a network device to control the luminous state of the traffic marking 20. Thus, it is convenient to remotely control the luminous state of the traffic marking 20.

[0058] In some examples, the server 40 may be located in a traffic management department, and the server 40 may switch the type of the luminous traffic marking 20 .

[0059] Specifically, the server 40 can be configured to use the road IoT monitoring system of the traffic management department to obtain the road condition information in the specified area, so that the server 40 can switch the type of luminous traffic markings 20 according to the road condition information. For example, by controlling the luminous state of the electronic markings 10, the switching between solid traffic markings and dotted traffic markings can be achieved. For another example, by controlling the luminous color of the electronic markings 10, the switching between white traffic markings and yellow traffic markings can be achieved. In this case, the luminous traffic markings 20 can have better flexibility, so that the luminous traffic markings 20 can be fully utilized to divert traffic and reduce road congestion.

[0060] It should be noted that these switches can be completed by the traffic management department sending instructions to multiple electronic markings 10 through the server 40 according to road condition information.

[0061] Return to see Figure 1 Generally speaking, the traffic sign 5 is usually set above or on the side of the road in a suspended manner. Figure 3B There may be a preset interval between the plurality of traffic signs 5. For example, the preset interval may be 50 meters to 100 meters.

[0062] In practical applications, for traffic signs 5 that are 50 meters away from the line of sight, it is usually difficult for most traffic participants to clearly see the traffic information represented by these traffic signs 5. In particular, at night or under bad weather conditions, traffic participants need to get closer to the traffic signs 5 in order to clearly see the traffic information represented by the traffic signs 5.

[0063] The traffic markings 20 are different. The traffic markings 20 are set on the road surface, and the traffic markings 20 are continuous and can extend along the length of the road. Furthermore, the traffic markings 20 can bend along with the curvature of the road. In this case, it is convenient for traffic participants to see the traffic markings 20 on the road surface at any time, so that they can drive under the guidance of the traffic markings 20.

[0064] In view of this, the present disclosure combines the luminous traffic markings 20 with the traffic sign 5. When the traffic sign 5 is not easily visible to traffic participants, the luminous traffic markings 20 can clearly and accurately convey the traffic information represented by the traffic sign 5 to traffic participants.

[0065] Furthermore, when the traffic sign 5 can be clearly seen by traffic participants, some traffic participants (such as novice drivers) may find it difficult to understand the traffic information represented by the traffic sign 5. The traffic information represented by the traffic sign 5 can be transmitted by using the luminous traffic marking 20, and then the information is received and processed by the identification device 30 and then conveyed to the traffic participants, so that the traffic participants can accurately understand the traffic information represented by the traffic sign 5.

[0066] In some examples, the electronic marking line 10 may be configured to emit a visible light signal, wherein the visible light signal may be a light signal modulated based on target information.

[0067] Specifically, when emitting visible light, the electronic marking 10 can modulate the visible light with target information to generate a visible light signal, that is, the visible light signal can represent the visible light carrying the target information. Thus, the electronic marking 10 can simultaneously have the functions of lighting and transmitting information. Furthermore, the luminous traffic marking 20 formed by combining multiple electronic markings 10 can also simultaneously have the functions of lighting and transmitting information.

[0068] In some examples, the target information may be traffic information represented by a plurality of traffic signs 5 that match the traffic markings 20. In some examples, the traffic signs 5 that match the traffic markings 20 may represent traffic signs 5 that are close to the traffic markings 20. In this case, the traffic information represented by the traffic signs 5 can be transmitted by visible light communication by utilizing the light emitted by the electronic markings 10 that are close to the traffic signs 5.

[0069] In some examples, the traffic sign 5 close to the traffic marking 20 may refer to a traffic sign 5 disposed near the traffic marking 20. For example, a traffic sign 5 disposed above the traffic marking 20 or on the side of the road.

[0070] In other examples, the target information may also be traffic information represented by any designated traffic sign 5. In addition, in some examples, the target information may also be information manually set according to actual needs.

[0071] In some examples, the traffic sign 5 may be a road facility that uses text or symbols to convey information such as guidance, restriction, warning or instruction, and the road facility may be suspended in the air above or on the side of the road.

[0072] In addition, the traffic sign 5 involved in the present disclosure may be a traffic sign that complies with the national standard "GB 5768.2-2022 Road Traffic Signs".

[0073] In some examples, along the travel direction D1 of the road, a plurality of different traffic signs 5 may be distributed above the traffic marking line 20 or on the side of the road (see Figure 3B Two traffic markings 5a and 5b are schematically shown. In addition, a plurality of different traffic signs 5 may indicate that the traffic information (ie, target information) represented by the plurality of traffic signs 5 is different.

[0074] In order to enable the traffic marking 20 to convey different target information clearly and accurately, the traffic marking 20 can be divided into multiple sections of sub-traffic markings, and the multiple sections of sub-traffic markings can be used to convey different target information respectively.

[0075] Specifically, in the present disclosure, the traffic marking line 20 may include a plurality of marking line segments 22 (ie, sub-traffic marking lines), and the marking line segments 22 may correspond to the traffic signs 5. That is, one traffic sign 5 may correspond to one marking line segment 22. Figure 3A Schematically showing a schematic diagram of one traffic sign 5 corresponding to one marking line segment 22).

[0076] In some examples, the line segment 22 corresponding to the traffic sign 5 can be used to convey the traffic information represented by the traffic sign 5 .

[0077] In other examples, one traffic sign 5 may correspond to multiple line segments 22. In this case, when multiple line segments 22 are used to transmit the traffic information represented by the traffic sign 5, the redundancy of the line segments 22 can be ensured. Figure 3B In the example shown, the traffic sign 5a may correspond to the line segment 22a and the line segment 22b, and the traffic sign 5b may correspond to the line segment 22c and the line segment 22d.

[0078] In some examples, the line segment 22 may include at least one electronic line segment 10. In this case, the line segment 22 can transmit the traffic information represented by the corresponding traffic sign 5 by emitting a visible light signal.

[0079] In some examples, the traffic sign 5 and the line segment 22 may establish a corresponding relationship in the following manner: the traffic line 20 extending from the front of the traffic sign 5 toward the travel direction D1 relative to the road by a preset length is the line segment 22 corresponding to the traffic sign 5. In other words, see Figure 3AFor a traffic sign 5, the line segment 22 corresponding to the traffic sign 5 may be: a traffic line 20 extending from the front of the traffic sign 5 to the reverse direction of the road for a preset length. In this case, since the moving object 6 (such as a vehicle) usually travels along the traffic direction D1 of the road, when the moving object 6 is at a preset distance from the traffic sign 5, the visible light signal is emitted by the line segment 22, so that the traffic information represented by the traffic sign 5 can be transmitted to the moving object 6 in advance, so that the traffic participants can obtain the target information in advance.

[0080] In some examples, based on the correspondence between the traffic signs 5 and the line segments 22, the traffic markings 20 may be segmented using multiple traffic signs 5 to obtain multiple line segments 22. Furthermore, the multiple line segments 22 may be used to transmit the traffic information represented by the multiple traffic signs 5, respectively.

[0081] In some examples, the traffic sign 5 that matches the traffic marking 20 may also represent the traffic sign 5 that has a corresponding relationship with the marking segment 22 .

[0082] In some examples, the line segment 22 can be configured to emit visible light signals, so that multiple line segments 22 can be used to transmit traffic information represented by different traffic signs 5. Specifically, the line segment 22 can transmit the traffic information represented by the traffic sign 5 corresponding to the line segment 22 by emitting visible light signals. In this case, the corresponding relationship between the line segment 22 and the traffic sign 5 can facilitate the traffic marking 20 to clearly and accurately transmit different target information.

[0083] For some examples, see Figure 3A The line segment 22 may include a plurality of electronic line markings 10, and the plurality of electronic line markings 10 constituting a line segment 22 may emit the same visible light signal. The visible light signal may be a signal generated by modulating visible light using traffic information represented by the traffic sign 5 corresponding to the line segment 22.

[0084] In some examples, the length of the line segment 22 can be set according to the type of road. Specifically, the interval between traffic signs 5 can be set according to different types of roads, and the length of the line segment 22 can be set based on the principle that the line segments 22 corresponding to different traffic signs 5 do not overlap. In this case, the visible light signals emitted by the multiple line segments 22 do not interfere with each other, thereby improving the accuracy of transmitting different target information through the visible light signals emitted by the multiple line segments 22.

[0085] In some examples, the length of the line segment 22 may be less than the interval between the traffic signs 5. Thus, it is possible to prevent the overlap between the line segments 22 corresponding to different traffic signs 5. For example, for highways, the interval between traffic signs 5 is generally 300 to 500 meters, and the length of the line segment 22 corresponding to the traffic sign 5 may be no more than 100 meters. For another example, for urban roads, the interval between traffic signs 5 is approximately 50 to 100 meters, and the length of the line segment 22 corresponding to the traffic sign 5 may be no more than 50 meters.

[0086] Figure 4 1 is a schematic diagram showing the entire electronic marking line 10 according to an example of the present disclosure. Figure 5 2 is a schematic diagram showing a light emitting layer 12 and a housing 11 according to an example of the present disclosure. Figure 6 is a block diagram showing the composition of the light emitting layer 12 according to the example of the present disclosure.

[0087] For some examples, see Figure 4 The electronic marking line 10 involved in the present disclosure may include a housing 11 and a light-emitting layer 12. The light-emitting layer 12 may be used to emit visible light signals, and the housing 11 may be used to support and protect the light-emitting layer 12.

[0088] For some examples, see Figure 5 The housing 11 may have a receiving chamber 110 , and the light emitting layer 12 may be disposed in the receiving chamber 110 . In addition, the shape of the light emitting layer 12 may be adapted to the receiving chamber 110 .

[0089] For some examples, see Figure 6 , the light emitting layer 12 may include a storage unit 122, a light emitting unit 124, a modulation unit 126, and a control unit 128. The storage unit 122 may be configured to store target information, the modulation unit 126 may be configured to generate a modulation signal based on the target information, and the control unit 128 may be configured to drive the light emitting unit 124 to emit a visible light signal based on the modulation signal. In this case, a modulation signal is generated based on the target information, and the visible light is modulated using the modulation signal to generate a visible light signal, so that the visible light carries the target information, and the target information can be transmitted using the visible light as an information carrier.

[0090] In some examples, the target information can be written into the storage unit 122 by, for example, burning. In other examples, the target information can be stored in the storage unit 122 by remote control of the server 40. Thus, the target information stored in the storage unit 122 can be easily updated.

[0091] In some examples, the modulation unit 126 may generate the coded data according to the target information in the storage unit 122. Furthermore, the modulation unit 126 may also convert the coded data into a modulation signal (eg, a level modulation signal).

[0092] In some examples, the control unit 128 can modulate the visible light emitted by the light emitting unit 124 based on the modulation signal to generate a visible light signal. In addition, the modulation of the visible light can select a suitable modulation method from a variety of existing modulation methods, such as a switch control method or an RGB (Red Green Blue, RGB) modulation method, etc. This disclosure is not limited to this.

[0093] In some examples, the light emitting unit 124 may be configured to emit visible light. Further, the light emitting unit 124 may be configured to emit visible light of different colors.

[0094] In some examples, the light emitting unit 124 may be an LED light board. Further, the LED light board may be a color-changing LED light array, which may emit visible light of different colors (e.g., white light, yellow light, and red light). In this case, by controlling the LED light board to emit visible light of a preset color, the electronic marking line 10 may emit visible light of different colors.

[0095] In some examples, the control unit 128 may be configured to control the light emitting unit 124 to turn on or off. Specifically, the control unit 128 may control the light emitting unit 124 to turn on or off the visible light. Thus, the working process of the light emitting unit 124 can be easily controlled.

[0096] Furthermore, the control unit 128 may also be configured to adjust the brightness or color of the visible light signal emitted by the light emitting unit 124. Thus, the working mode of the light emitting unit 124 can be easily controlled.

[0097] In some examples, the control unit 128 may be in communication with the server 40. The server 40 may control the light emitting unit 124 to turn on or off the visible light through the control unit 128. In addition, the server 40 may also adjust the brightness or color of the visible light emitted by the light emitting unit 124 through the control unit 128.

[0098] In some examples, the housing 11 of the electronic marking line 10 can be made of a hard alloy material, such as stainless steel, cast iron, aluminum alloy, or copper alloy. Preferably, the material of the housing 11 can be stainless steel. In this case, the housing 11 can have good rigidity and strength, thereby supporting and protecting the light-emitting layer 12 in the accommodating chamber 110. In addition, the good thermal conductivity of the hard alloy material can improve the heat dissipation performance of the electronic marking line 10.

[0099] Figure 7 is a schematic diagram showing a cross section of an electronic marking line 10 according to an example of the present disclosure. Figure 8 1 is a schematic diagram showing the sequential stacking of the surface wear-resistant layer 14 , the pressure-resistant layer 16 and the light-emitting layer 12 involved in the example of the present disclosure. Fig. 9 Schematic diagram showing the surface wear-resistant layer 14 according to the example of the present disclosure. Fig.10 is a schematic diagram showing the pressure-resistant layer 16 involved in the example of the present disclosure.

[0100] For some examples, see Figure 7 The electronic marking line 10 may further include a surface wear-resistant layer 14 and a pressure-resistant layer 16. Both the surface wear-resistant layer 14 and the pressure-resistant layer 16 may be light-transmissive.

[0101] For some examples, see Figure 7 The housing 11 may have an opening communicating with the accommodating chamber 110. Along a direction D2 from the opening toward the accommodating chamber 110, the surface wear-resistant layer 14, the pressure-resistant layer 16 and the light-emitting layer 12 may be sequentially stacked in the accommodating chamber 110 ( Figure 8 The schematic diagram schematically shows that the surface wear-resistant layer 14, the pressure-resistant layer 16 and the luminous layer 12 are stacked in sequence. In this case, the visible light emitted by the luminous layer 12 can be transmitted to the opening of the accommodating chamber 110 through the pressure-resistant layer 16 and the surface wear-resistant layer 14 in sequence, so that the visible light emitted by the electronic marking 10 can be recognized by traffic participants.

[0102] In some examples, there may be a gap between the surface wear-resistant layer 14, the pressure-resistant layer 16, and the light-emitting layer 12 and the inner wall of the receiving chamber 110. The gap may be filled with waterproof glue. In this case, the surface wear-resistant layer 14, the pressure-resistant layer 16, and the light-emitting layer 12 can be stably fixed to the receiving chamber 110 by the viscosity of the waterproof glue. In addition, the waterproof property of the waterproof glue can improve the waterproof performance of the electronic marking line 10.

[0103] In some examples, the electronic marking line 10 can be set on the road surface in a manner of being embedded in the road surface, and the surface wear-resistant layer 14 can be flush with the road surface. Specifically, the surface wear-resistant layer 14 set in the receiving chamber 110 can be flush with the opening of the receiving chamber 110, and the opening of the receiving chamber 110 can be flush with the road surface. In addition, the opening can face the road surface.

[0104] In some examples, the surface wear-resistant layer 14 can be used to enhance the anti-skid and wear-resistant performance of the electronic marking line 10. In some examples, the material of the surface wear-resistant layer 14 includes an adhesive material and a reflective material 142. The adhesive material can be used to fix the reflective material 142. The reflective material 142 can be used to reflect external light and increase surface friction.

[0105] In some examples, the adhesive material may partially cover the reflective material 142 to fix the reflective material 142. In other words, see Fig. 9 After the reflective material 142 is fixed by the adhesive material, the reflective material 142 can protrude from the outer surface of the surface wear-resistant layer 14 (that is, the side of the surface wear-resistant layer 14 facing the road surface). In this case, the roughness of the outer surface of the surface wear-resistant layer 14 can be increased, thereby increasing the friction between the electronic marking line 10 and the wheels of the vehicle, and further improving the anti-skid performance of the electronic marking line 10.

[0106] In some examples, the reflective material 142 may be glass beads. Specifically, the reflective material 142 may be a plurality of glass beads having a preset size.

[0107] In some examples, the preset size of the glass beads can be 30 mesh to 200 mesh. For example, the preset size can be 30 mesh, 40 mesh, 50 mesh, 60 mesh, 70 mesh, 80 mesh, 90 mesh, 100 mesh, 120 mesh, 140 mesh, 160 mesh, 180 mesh, or 200 mesh.

[0108] In some examples, a portion of the glass beads themselves can be fixed by adhesive, and another portion can be protruded from the outer surface of the surface wear-resistant layer 14. In this case, the outer surface of the surface wear-resistant layer 14 can form a textured rough surface, so that the incident light from the outside can be better diffusely reflected, thereby improving the recognition of the electronic marking line 10 when it is not luminous.

[0109] In some examples, a plurality of glass micro beads may be fixed to the outer surface of the surface wear-resistant layer 14 in a uniformly distributed manner, thereby forming a rough surface with uniform texture on the outer surface of the surface wear-resistant layer 14 .

[0110] In some examples, the adhesive material may include at least one of epoxy, polyurethane, polyethylene, polyvinyl chloride, polypropylene, polyurea, acrylate, and plastic filler oil.

[0111] As described above, the electronic marking line 10 may include a pressure-resistant layer 16. The pressure-resistant layer 16 may be used to improve the load resistance performance of the electronic marking line 10.

[0112] For some examples, see Fig.10, the pressure-resistant layer 16 may include a first transparent plastic layer 162, a tempered glass layer 164, and a second transparent plastic layer 166 stacked in sequence. In this case, the tempered glass layer 164 has a high mechanical strength, which can improve the rigidity of the pressure-resistant layer 16, thereby improving the performance of the electronic marking line 10 in resisting vehicle loads. In addition, by arranging the tempered glass layer 164 between the first transparent plastic layer 162 and the second transparent plastic layer 166, it is possible to prevent the vehicle from directly contacting the tempered glass, thereby reducing the impact of the vehicle on the tempered glass, and further protecting the tempered glass layer 164.

[0113] In some examples, the material of the first transparent plastic layer 162 and the second transparent plastic layer 166 may be the same. For example, the material of the first transparent plastic layer 162 and the second transparent plastic layer 166 may be PC material (i.e., polycarbonate plastic material). In this case, the first transparent plastic layer 162, the second transparent plastic layer 166, and the tempered glass layer 164 can be combined to form a high-rigidity pressure-resistant layer 16 due to the high strength of the PC material, thereby improving the performance of the electronic marking 10 in resisting vehicle loads.

[0114] Fig.11 2 is a block diagram showing the composition of the recognition device 30 involved in the example of the present disclosure.

[0115] Return to see Figure 2 The visible light communication system 1 involved in the present disclosure may further include an identification device 30. The identification device 30 may be configured to receive a visible light signal and obtain target information based on the visible light signal. In this case, receiving the visible light signal through the identification device 30 and processing the visible light signal enables traffic participants to obtain traffic information represented by the traffic sign.

[0116] For some examples, see Fig.11 The recognition device 30 may include a photoelectric conversion unit 32, which may be configured to receive a visible light signal and demodulate the visible light signal to obtain target information. In this case, the photoelectric conversion unit 32 can convert the visible light signal into an electrical signal, and then the target information can be obtained by processing the electrical signal.

[0117] For example, the photoelectric conversion unit 32 may be a photodetector, which may perform photoelectric transformation on a visible signal to obtain an electrical signal, and then obtain target information by processing the electrical signal.

[0118] Return to see Figure 1In some examples, the recognition device 30 may be provided on a moving object 6, and the moving object 6 may represent an object moving on a road. Further, the moving object 6 may include, for example, a motor vehicle, a non-motor vehicle, and a pedestrian.

[0119] In addition, the position where the identification device 30 is set on the moving object 6 can be a position that is conducive to receiving the visible light signal emitted by the marking line segment 22, and the present disclosure does not limit this.

[0120] It should be noted that the recognition device 30 usually receives visible light signals when the moving object moves. Due to the movement of the recognition device 30, the distance between the recognition device 30 and the marking segment 22 is in dynamic change, so that the visible light signals received by the recognition device 30 have multiple incident directions.

[0121] In view of this, see Fig.11 The recognition device 30 may include a lens unit 34, which may be used to focus visible light signals from multiple incident directions. In some examples, the visible light signal may first pass through the lens unit 34 and then be transmitted to the photodetector. In this case, the efficiency of receiving the visible light signal by the photoelectric conversion unit 32 can be improved.

[0122] In addition, in some examples, under severe weather conditions such as dust, haze, etc., the intensity of the visible light signal will be greatly affected. In addition, the recognition device 30 receives the visible light signal while moving, which may cause the visible light signal received by the photoelectric detector to be weak, which is not conducive to accurately obtaining target information.

[0123] In view of this, see Fig.11 The recognition device 30 may further include a preprocessing unit 36, which may be used to enhance and amplify the visible light signal. In some examples, the visible light signal may first pass through the lens unit 34, then pass through the preprocessing unit 36, and finally be transmitted to the photoelectric conversion unit 32.

[0124] In some examples, the pre-processing unit 36 ​​may be a fluorescence collector, which may enhance and amplify the visible light signal through the fluorescence effect.

[0125] Specifically, after receiving the visible light signal, the fluorescence collector can stimulate the fluorescence effect to generate a fluorescence signal, and transmit the fluorescence signal to the lens unit 34. In this case, the visible light signal can be enhanced and amplified by the fluorescence effect, so that the intensity of the visible light signal can be enhanced.

[0126] Alternatively, the fluorescence signal generated by the fluorescence collector can be directly transmitted to a photodetector.

[0127] For some examples, see Fig.11The recognition device 30 may further include a prompting unit 38, which may be configured to transmit the target information by way of text display or voice broadcast. In this case, it is convenient for traffic participants to obtain the traffic information represented by the traffic sign 5. In addition, even if the traffic participants cannot understand the traffic information represented by the traffic sign 5, the traffic participants can accurately understand the traffic information represented by the traffic sign 5 by way of easy-to-understand methods such as voice or text.

[0128] Although the present disclosure is specifically described above in conjunction with the accompanying drawings and examples, it is to be understood that the above description does not limit the present disclosure in any form. Those skilled in the art may modify and change the present disclosure as needed without departing from the essential spirit and scope of the present disclosure, and these modifications and changes all fall within the scope of the present disclosure.

Claims

1. A visible light communication system based on electronic markings is a system for transmitting traffic information through the electronic markings set on the road surface. It is characterized in that include: Multiple luminous electronic markings and identification devices, A plurality of said electronic marking lines are arranged on the road surface and are combined and spliced ​​to form a luminous traffic marking line. The electronic marking line is configured to emit a visible light signal modulated based on target information, The recognition device is configured to receive the visible light signal and acquire the target information based on the visible light signal, The target information is traffic information represented by a plurality of traffic signs matching the traffic markings.

2. The visible light communication system according to claim 1, It is characterized in that It also includes a server that communicates with the plurality of electronic markings via an access network device, and the server is configured to remotely control the luminous states of the plurality of electronic markings through the access network device to control the luminous states of the traffic markings.

3. The visible light communication system according to claim 1, It is characterized in that The traffic marking includes a plurality of marking segments corresponding to the traffic signs, and the marking segments include at least one of the electronic marking segments.

4. The visible light communication system according to claim 3, It is characterized in that The length of the line segment is smaller than the interval between the traffic signs.

5. The visible light communication system according to claim 1, It is characterized in that The electronic marking line is arranged on the road surface in a manner of being embedded in the road surface and is flush with the road surface.

6. The visible light communication system according to claim 5, It is characterized in that The electronic marking line includes a storage unit, a light emitting unit, a modulation unit, and a control unit. The storage unit is configured to store the target information, and the modulation unit is configured to generate a modulation signal based on the target information. The control unit is configured to drive the light emitting unit to emit the visible light signal based on the modulation signal.

7. The visible light communication system according to claim 6, It is characterized in that The control unit is configured to control the light emitting unit to turn on or off, and adjust the brightness or color of the visible light signal emitted by the light emitting unit.

8. The visible light communication system according to claim 1, It is characterized in that The recognition device is disposed on a moving object, and includes a photoelectric conversion unit, wherein the photoelectric conversion unit is configured to receive the visible light signal and demodulate the visible light signal to obtain the target information.

9. The visible light communication system according to claim 8, It is characterized in that The recognition device further comprises a lens unit, and the lens unit can be used to focus the visible light signals of various incident directions.

10. The visible light communication system according to claim 8, It is characterized in that The recognition device further includes a prompt unit, which is configured to transmit the target information by way of text display or voice broadcast.

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