Traffic signal system adopting all-optical ring network structure

Abstract

The utility model provides a traffic signal system adopting an all-optical ring network structure, which comprises a plurality of signal lamp command areas and an area control center, each signal lamp command area comprises a plurality of adjacent signal machines, and each signal machine comprises a main control device and a plurality of lamp control devices. The lamp control equipment controls the working state of the intersection signal lamp according to the signal of the main control equipment; in each signal lamp command area, network ports of the multiple signal machines are sequentially connected in series through communication links to form a looped network structure, and at least one signal machine is selected as access point equipment; the network port of the area control center and the network ports of the access point devices are sequentially connected in series through communication links to form a looped network structure. The traffic signal system adopting the all-optical ring network structure has the advantages of scientific design, low failure rate, small maintenance difficulty and stable signal transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent transportation, and in particular to a traffic signal system adopting a full optical ring network structure. Background Art

[0002] Road signals are devices used to control the operation of traffic lights. They typically direct traffic flow, including orderly movement, stopping, and waiting, according to preset schemes and logic, ensuring safe and smooth traffic flow at intersections or specific road sections. Currently, most road signals use electrical signals for communication. This communication method requires numerous electronic components and complex circuits, making it prone to failure and difficult to troubleshoot and repair. Furthermore, electrical signals suffer from rapid signal attenuation, short transmission distances, and high energy consumption during transmission. Furthermore, cities are plagued by a large number of electromagnetic signal sources (such as high-voltage power lines and communication base stations), making them susceptible to electromagnetic interference, which can affect the display of traffic lights.

[0003] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0004] The purpose of the utility model is to address the deficiencies of the existing technology and thus provide a traffic signal system adopting a full optical ring network structure with scientific design, low failure rate, low maintenance difficulty and stable signal transmission.

[0005] In order to achieve the above-mentioned objectives, the technical solution adopted by the present invention is: a traffic signal system adopting a full optical ring network structure, including several signal light command areas and regional control centers, each of the signal light command areas includes multiple adjacent signal machines, each of the signal machines includes a main control device and several light control devices, and the light control devices control the working status of the intersection signal lights according to the signals of the main control device; in each of the signal light command areas, the network ports of the multiple signal machines are serially connected in sequence through communication links to form a ring network structure, and at least one of the signal machines is selected as an access point device; the network port of the regional control center and the network ports of the multiple access point devices are serially connected in sequence through communication links to form a ring network structure.

[0006] Based on the above, in each of the traffic lights, the network port of the master control device and the network ports of several of the lighting control devices are serially connected in sequence through communication links to form a ring network structure.

[0007] Based on the above, in each of the traffic lights, the communication link between the main control device and the plurality of light control devices adopts optical fiber or twisted pair cable.

[0008] Based on the above, the communication link between the regional control center and the plurality of access point devices uses optical fiber.

[0009] Based on the above, in each of the traffic light control areas, the communication links between the multiple traffic lights adopt optical fiber or twisted pair cable.

[0010] The present invention has substantial features and progress compared to the prior art. Specifically, the present invention has the following advantages:

[0011] (1) Multiple nearby traffic lights are grouped into a traffic light command area, and a ring network structure is formed within the area. Then, the access point device is selected from each traffic light command area to form a ring network structure with the regional control center. Data is transmitted on the ring network, which has strong redundancy. When a certain communication link fails, some communication functions can be maintained through reverse paths, etc., making the system operation more stable.

[0012] (2) A ring network structure is also adopted inside each signal machine, which can improve the operating stability of a single signal machine.

[0013] (3) By using optical fiber connections between the regional control center and the plurality of access point devices, traditional non-network management devices, such as red light detectors, can be eliminated, the number of electronic components can be reduced, the complexity of the circuit can be reduced, and thus the failure rate and maintenance difficulty can be reduced.

[0014] (4) Within a single signal machine and within the signal light control area, the lines are short and twisted pair cables can be used for connection, which can reduce costs and not affect the signal transmission speed too much; optical fiber connection can maximize the signal transmission speed and anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a traffic signal system adopting a full optical ring network structure in the present utility model.

[0016] Figure 2 It is a schematic diagram of the ring network structure of the signal light command area in the utility model.

[0017] Figure 3 It is a schematic diagram of the internal ring network structure of the signal machine in the utility model.

[0018] In the figure: 1. Regional control center; 2. Master control equipment; 3. Lighting control equipment; 4. Communication link. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0020] like Figure 1-3 As shown, a traffic signal system adopting a full optical ring network structure includes several signal light command areas and a regional control center 1. Each of the signal light command areas includes multiple adjacent signal machines. Each of the signal machines includes a main control device 2 and several light control devices 3. The light control devices 3 control the working status of the intersection signal lights according to the signals of the main control device 2. This part belongs to the conventional equipment in the urban traffic system.

[0021] In order to improve the stability of system operation, in each of the traffic lights, the network port of the main control device 2 and the network ports of several of the light control devices 3 are connected in series in sequence through a communication link to form a ring network structure; in each of the traffic light command areas, the network ports of multiple traffic lights are connected in series in sequence through a communication link to form a ring network structure, and at least one traffic light is selected as an access point device; the network port of the regional control center 1 and the network ports of multiple access point devices are connected in series in sequence through a communication link to form a ring network structure.

[0022] To ensure signal transmission speed and anti-interference capability, the distance between the traffic light command area is generally relatively far, and the communication link between the regional control center 1 and the multiple access point devices adopts optical fiber; at the same time, the optical fiber connection method can eliminate traditional non-network management equipment, such as red light detectors, etc., reduce the number of electronic components, reduce the complexity of the circuit, and thus reduce the failure rate and maintenance difficulty.

[0023] In each of the traffic light control areas and within the signal machine, due to the short transmission distance, the communication link between the two can use optical fiber or twisted pair cable. Twisted pair cable can reduce costs and the signal transmission speed will not be greatly affected; optical fiber connection can maximize the signal transmission speed and anti-interference ability.

[0024] Working principle:

[0025] A ring network structure is used to connect the interior of each signal light, and multiple nearby signal lights are formed into a signal light command area. A ring network structure is formed within the area, and then the access point device is selected from each signal light command area to form a ring network structure with the regional control center. Data is transmitted on the ring network, which has strong redundancy. When a certain section of the communication link fails, some communication functions can be maintained through reverse paths and other methods, making the system operation more stable.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A traffic signal system using an all-optical ring network structure, comprising a plurality of signal light control areas, each of which includes a plurality of adjacent traffic lights, each of which includes a master control device and a plurality of light control devices, wherein the light control devices control the operating state of the intersection lights according to signals from the master control device, characterized in that: It also includes a regional control center; in each of the traffic light command areas, the network ports of multiple traffic lights are connected in series in sequence through communication links to form a ring network structure, and at least one traffic light is selected as an access point device; the network port of the regional control center and the network ports of multiple access point devices are connected in series in sequence through communication links to form a ring network structure.

2. The traffic signal system using an all-optical ring network structure according to claim 1, characterized in that: In each of the traffic lights, the network port of the master control device and the network ports of several of the lighting control devices are serially connected in sequence through a communication link to form a ring network structure.

3. The traffic signal system using an all-optical ring network structure according to claim 2, characterized in that: In each of the traffic lights, the communication link between the main control device and the plurality of lighting control devices adopts optical fiber or twisted pair cable.

4. The traffic signal system using an all-optical ring network structure according to any one of claims 1 to 3, characterized in that: The communication link between the regional control center and the plurality of access point devices uses optical fiber.

5. The traffic signal system using an all-optical ring network structure according to claim 4 is characterized in that: In each of the signal light control areas, the communication links between the multiple signal lights adopt optical fibers or twisted-pair cables.

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