Tunnel signal lamp control system

Abstract

The utility model provides a tunnel signal lamp control system, and relates to the technical field of traffic signal equipment, the tunnel signal lamp comprises a communication control unit, an LED light emitting unit, and a 24V switch power supply, the communication control unit comprises a first one-chip microcomputer, an MOS switch, an input serial port, a first output serial port, and a first voltage stabilizing power supply; the tunnel signal lamp control device comprises a second single-chip microcomputer, a network communication unit, a second output serial port, a second voltage-stabilized power supply and a 5V switching power supply. The tunnel lamp control device has the beneficial effects that the tunnel lamp control device realizes automatic control of the tunnel signal lamp through a cascade mode that the output serial port is connected with the signal lamp input serial port, improves the operation efficiency and accuracy of the tunnel signal lamp, further guides a vehicle to run at a limited speed, reduces congestion caused by too low running speed of the vehicle, and improves the urban traffic efficiency.

Description

Technical Field

[0001] This utility model application relates to the field of traffic signal equipment technology, specifically to a tunnel signal light control system. Background Technology

[0002] Currently, many cities are building a large number of tunnels to improve urban traffic efficiency. There are no intersections in the tunnels, and vehicles can travel at higher speeds. However, tunnels have curves, ramps for entering and exiting the tunnel, merging ramps, etc. When passing through these sections, vehicles will slow down. If a vehicle does not accelerate in time after passing through, it will cause congestion of vehicles behind it, causing the tunnel's traffic efficiency to drop sharply.

[0003] However, currently there are only speed limit signs when entering tunnels. In tunnels, there is a lack of traffic lights to guide vehicles to drive at the maximum safe speed limit in sections where vehicles tend to slow down, such as curves and slopes. Even when speed limit signs are installed, many vehicles do not consciously speed up. Currently, there is a lack of tunnel traffic lights that use technology to promote reasonable speed control for vehicles. In addition, the current use of speed limit signs is too costly. Summary of the Invention

[0004] To address the problem of vehicles traveling at speeds below the road speed limit in tunnels, causing congestion due to slow-moving traffic, a new type of tunnel traffic light is designed. Tunnel traffic lights are installed continuously at fixed intervals within the tunnel. These lights dynamically illuminate and deactivate according to the road speed limit, forming a light strip that moves in the direction of vehicle travel according to the road's design speed. This guides vehicles to travel at the speed limit, reducing congestion caused by excessively low vehicle speeds and improving urban traffic efficiency.

[0005] A tunnel signal light control system, comprising:

[0006] N tunnel traffic lights and tunnel traffic light control devices, wherein the N tunnel traffic lights are connected sequentially in a cascade manner, and the tunnel traffic light control devices are connected to the first tunnel traffic light;

[0007] The tunnel signal light control device transmits the control signal of the tunnel signal light to the first tunnel signal light, and the first tunnel signal light then forwards the control signal of the tunnel signal light to the next tunnel signal light in turn.

[0008] Optionally, the tunnel signal lights include:

[0009] The communication control unit includes a communication control unit, an LED light-emitting unit, and a 24V switching power supply. The communication control unit includes a first microcontroller, a MOS switch, an input serial port, a first output serial port, and a first regulated power supply.

[0010] The first microcontroller input terminal is connected to the first regulated power supply output terminal and the input serial port. The first microcontroller output terminal is connected to the first output serial port and the MOS switch. The MOS switch is connected to the LED light-emitting unit. The 24V switching power supply output terminal is connected to the MOS switch and the first regulated power supply input terminal respectively.

[0011] Optionally, the LED light-emitting unit includes red, yellow, and green LEDs arranged in a rectangular strip.

[0012] Optionally, the source of the MOS switch is connected to the switching power supply unit as the input terminal of the MOS switch, the gate of the MOS switch is connected to the first microcontroller as the control terminal of the MOS switch, and the drain of the MOS switch is connected to the three-color LEDs of the LED light-emitting unit as the output terminal of the MOS switch.

[0013] Optionally, the first microcontroller is connected to the input port via the receive pin, and the first microcontroller is connected to the first output port via the transmit pin.

[0014] Optionally, the input terminal of the 24V switching power supply is 220V AC.

[0015] Optionally, the tunnel signal light control device includes:

[0016] Second microcontroller, network communication unit, second output serial port, second regulated power supply, 5V switching power supply;

[0017] The second microcontroller's input terminal is connected to the 5V switching power supply, the second microcontroller's output terminal is connected to the second output serial port, the second microcontroller is bidirectionally connected to the network communication unit, the network communication unit's input terminal is connected to the second regulated power supply, and the second regulated power supply's input terminal is connected to the 5V switching power supply.

[0018] Optionally, the second microcontroller includes a first hardware serial port, which is connected to the second output serial port.

[0019] Optionally, the input terminal of the 5V switching power supply is 220V AC.

[0020] Optionally, the second microcontroller further includes a second hardware serial port, and the network communication unit is connected to the second hardware serial port of the second microcontroller through two I / O ports.

[0021] In summary, the tunnel signal light and its control device described in this application have the following advantages:

[0022] 1. The utility model design of the tunnel traffic light connects multiple tunnel traffic lights together with communication lines in a cascade manner. Each light receives the control signal from the previous tunnel traffic light and forwards it to the next, realizing the dynamic on and off of the tunnel traffic lights according to the speed limit of the road section, while reducing costs.

[0023] 2. This utility model sends control signals from the control center to the tunnel traffic light control device. The control device connects the output serial port to the input serial port of the traffic lights in a cascaded manner to achieve automated control of the tunnel traffic lights, improve the operating efficiency and accuracy of the tunnel traffic lights, and thus guide vehicles to drive at the speed limit, reduce congestion caused by vehicles driving too slowly, and improve urban traffic efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the planar structure of the tunnel signal light according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the planar structure of the tunnel signal light control device according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the tunnel signal light connection method described in this utility model. Figure 1 ;

[0028] Figure 4 This is a flowchart of the tunnel signal light control according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the tunnel signal light connection method described in this utility model. Figure 2 .

[0030] Reference numerals: 100 represents the communication control unit, 200 represents the LED light-emitting unit, 300 represents the 24V switching power supply, 101 represents the first microcontroller, 102 represents the MOS switch, 103 represents the input serial port, 104 represents the first output serial port, and 105 represents the first regulated power supply.

[0031] 400 indicates the second microcontroller, 500 indicates the network communication unit, 600 indicates the second output serial port, 700 indicates the second regulated power supply, and 800 indicates the 5V switching power supply. Detailed Implementation

[0032] To make this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Example 1: A tunnel signal light

[0035] A tunnel signal light, comprising:

[0036] The communication control unit 100, LED light-emitting unit 200, and 24V switching power supply 300 are included. The communication control unit includes a first microcontroller 101, a MOS switch 102, an input serial port 103, a first output serial port 104, and a first regulated power supply 105.

[0037] The input terminal of the first microcontroller 101 is connected to the output terminal of the first regulated power supply 105 and the input serial port 103. The output terminal of the first microcontroller 101 is connected to the first output serial port 104 and the MOS switch 102. The MOS switch 102 is connected to the LED light-emitting unit 200. The output terminal of the 24V switching power supply 300 is connected to the MOS switch 102 and the input terminal of the first regulated power supply 105 respectively.

[0038] The 24V switching power supply 300 (model PAD24-24) receives 220VAC AC power from the mains. It converts this 220VAC power into 24V to power the tunnel signal light LED unit 200. The first voltage regulator 105 (model LM7805) converts this to 5VDC to power the first microcontroller 101 and the SP485 chip (input serial port 103, model SP485) and first output serial port 104 (model SP485). A red LED indicates a blocked road and prohibits vehicles from passing; a yellow LED indicates a slowdown and vehicles should reduce speed; and a green LED indicates a clear road and vehicles should accelerate to match the green signal speed.

[0039] The input terminal of MOS switch 102 (model NEC60P10) is connected to 24VDC switching power supply 300. MOS switch 102 is used to control the output of 24V electrical signal. The source of MOS switch 102 is connected to the switching power supply unit as the input terminal of MOS switch 102. The gate of MOS switch 102 is connected to the first microcontroller STC8G1K08 as the control terminal of MOS switch 102. The drain is connected to the three-color LEDs of LED light-emitting unit 200 as the output terminal of MOS switch 102. The LED light-emitting unit 200 includes red, yellow and green LEDs arranged in a rectangular strip. Each color LED has a 24V electrical signal input for control. It lights up when there is power and turns off when there is no power.

[0040] The first microcontroller 101 (model STC8G1K08) is connected to the input serial port 103 via the Receive (RX) pin of the hardware serial port module, and to the first output serial port 104 via the Transmit (TX) pin of the hardware serial port module. The long-distance transmitted 485 differential signal is converted to a TTL level signal by a serial port SP485 chip set to receive mode before being received by the microcontroller. The TTL level signal output by the microcontroller is converted back to a 485 differential signal by a serial port SP485 chip set to transmit mode and transmitted to the next tunnel signal light. The input serial port of each tunnel signal light is connected to the output serial port of the previous tunnel signal light, and all tunnel signal lights are cascaded.

[0041] Example 2: A tunnel signal light control device

[0042] A tunnel signal light control device, comprising:

[0043] Second microcontroller 400, network communication unit 500, second output serial port 600, second regulated power supply 700, 5V switching power supply 800.

[0044] The input terminal of the second microcontroller 400 is connected to the 5V switching power supply 800, the output terminal of the second microcontroller 400 is connected to the second output serial port 600, the second microcontroller 400 is bidirectionally connected to the network communication unit 500, the input terminal of the network communication unit 500 is connected to the second regulated power supply 700, and the input terminal of the second regulated power supply 700 is connected to the 5V switching power supply 800.

[0045] The input terminal of the 5V switching power supply 800 (model PAK12-5) is 220VAC AC mains power. The 5V switching power supply 800 outputs 5VDC to power the second microcontroller 400 (model STC8G1K08), the second output serial port 600 (model SP485), and the second voltage regulator 700 (model LM1117-3.3). The second voltage regulator 800 (model LM1117-3.3) receives 5V power and, through linear regulation, outputs 3.3V power to power the network communication unit 500 (model USR-K5).

[0046] The second microcontroller 400 includes a first hardware serial port, which uses an IO to send TTL level signals through a software simulated serial port. This simulated serial port IO responsible for sending is connected to the second output serial port 600 to convert the TTL signal into a 485 differential signal and send it to the communication control unit 100 of the tunnel signal light. The implementation method is to connect the input serial port 103 of the first tunnel signal light to the second output serial port 600.

[0047] The second microcontroller also includes a second hardware serial port. The network communication unit 500 is connected to the second hardware serial port of the second microcontroller 400 via TX and RX I / O channels. The network communication unit 500 can provide a TCP client mode to establish a connection with the control center. In this way, the network communication unit 500 can convert the TCP data sent by the control center into ordinary TTL serial port data and send it to the second microcontroller 400. At the same time, it can also receive data sent by the second microcontroller 400 from the TTL serial port, convert it into TCP data, and send it to the control center through the network port, realizing bidirectional interconnection between the second microcontroller 400 and the control center.

[0048] Example 3: A tunnel signal light control system

[0049] The tunnel signal light control system includes:

[0050] N tunnel traffic lights and traffic light control devices, connected as follows: Figure 3 and Figure 5 As shown, the N tunnel traffic lights are connected sequentially in a cascaded manner, and the tunnel traffic light control device is connected to the first tunnel traffic light. The tunnel traffic lights are installed at fixed intervals above or on both sides of the tunnel, and are cascaded together via communication lines. The input serial port 103 of each tunnel traffic light is connected to the first output serial port 104 of the previous tunnel traffic light, and the input serial port 103 of the first tunnel traffic light is connected to the second output serial port 600 of the tunnel traffic light control device.

[0051] The tunnel signal light control device transmits the control signal of the tunnel signal light to the first tunnel signal light, and the first tunnel signal light then forwards the control signal of the tunnel signal light to the next tunnel signal light in turn.

[0052] The control process for controlling the tunnel signal lights is as follows: Figure 4 As shown, it includes:

[0053] The control center (PC) sends control information such as the on / off status, color, hold time, transmission delay, and transmission cycle of the tunnel traffic lights to the tunnel traffic light control device via the network port. The tunnel traffic light control device sends control information such as on / off status, color, hold time, and transmission delay to the tunnel traffic lights according to the transmission cycle. Upon receiving the control information, the tunnel traffic lights perform the actions of turning on, holding, and turning off the lights, forming a dynamic light strip that advances according to the speed limit. This is used to instruct vehicles to keep up with the speed limit in time and wait for the transmission delay before transmitting control information to the next tunnel traffic light.

[0054] The control center only needs to send the control information to the tunnel signal light control device once. The tunnel signal light control device will repeatedly send the control information to the tunnel signal light on a cycle before receiving new control information. If no subsequent control information is received after the tunnel signal light is turned off, it will remain off until a new control information is received to perform the lighting operation.

[0055] The speed at which the signal composed of tunnel traffic lights advances is equal to the distance between the tunnel traffic lights divided by the transmission delay; the number of tunnel traffic lights lit simultaneously is equal to the holding time divided by the transmission delay.

[0056] In summary, the tunnel traffic lights designed in this utility model are connected together by communication lines in a cascaded manner. Each light receives the control signal from the previous tunnel traffic light and forwards it to the next, so as to realize the dynamic on and off of the tunnel traffic lights according to the speed limit of the road section.

[0057] This invention sends control signals from the control center to the tunnel traffic light control device. The control device connects the output serial port to the input serial port of the traffic lights in a cascaded manner, thereby achieving automated control of the tunnel traffic lights, improving the operating efficiency and accuracy of the tunnel traffic lights, guiding vehicles to travel at the speed limit, reducing congestion caused by excessively low vehicle speeds, and improving urban traffic efficiency.

[0058] Finally, it should be noted that any modification or equivalent substitution of some or all of the technical features based on the technical solution of the present utility model device structure and the described embodiments, which does not depart from the corresponding technical solution of this patent, shall fall within the patent scope of the present utility model device structure and the described implementation.

Claims

1. A tunnel signal light control system characterized by, The application relates to a tunnel signal lamp and a tunnel signal lamp control device. The tunnel signal lamp control device transmits the control signal of the tunnel signal lamp to the first tunnel signal lamp, and the first tunnel signal lamp forwards the control signal of the tunnel signal lamp to the next tunnel signal lamp. The tunnel signal lamp comprises a communication control unit, an LED light-emitting unit and a 24V switching power supply.

2. The tunnel signal light control system of claim 1, wherein, The first single-chip microcomputer input end is connected with the first voltage stabilizing power supply output end and the input serial port, the first single-chip microcomputer output end is connected with the first output serial port and the MOS switch, the MOS switch is connected with the LED light-emitting unit, and the 24V switching power supply output end is respectively connected with the MOS switch and the first voltage stabilizing power supply input end. The MOS switch connects the source as the MOS switch input end with the switching power supply unit, connects the MOS switch gate as the MOS switch control end with the first single-chip microcomputer, and connects the MOS switch drain as the MOS switch output end with the three-color LED of the LED light-emitting unit. The first single-chip microcomputer is connected with the input port through the receiving pin, and is connected with the first output port through the sending pin.

3. The tunnel signal light control system of claim 2, wherein, The input end of the 24V switching power supply is 220V alternating current.

4. The tunnel signal light control system of claim 2, wherein, The tunnel signal lamp control device comprises a second single-chip microcomputer, a network communication unit, a second output serial port, a second voltage stabilizing power supply, a 5V switching power supply.

5. The tunnel signal light control system of claim 2, wherein, The second single-chip microcomputer input end is connected with the 5V switching power supply, the second single-chip microcomputer output end is connected with the second output serial port, the second single-chip microcomputer is bidirectionally connected with the network communication unit, the network communication unit input end is connected with the second voltage stabilizing power supply, and the second voltage stabilizing power supply input end is connected with the 5V switching power supply.

6. The tunnel signal light control system of claim 2, wherein, The second single-chip microcomputer comprises a first hardware serial port and is connected with the second output serial port through the first hardware serial port.

7. The tunnel signal light control system of claim 1, wherein, The input end of the 5V switching power supply is 220V alternating current. The second single-chip microcomputer further comprises a second hardware serial port, and the network communication unit is connected with the second hardware serial port of the second single-chip microcomputer through two-way IO ports. ​ 8. The tunnel signal light control system of claim 7, wherein, ​ 9. The tunnel signal light control system of claim 7, wherein, ​ 10. The tunnel signal light control system of claim 7, wherein, ​

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