Traffic variable sign label control system

Abstract

The utility model discloses a control system of a traffic variable sign label. The control system comprises a main control module used for processing data and controlling output; the data input module is used for receiving data input, and the output end of the data input module is connected with the input end of the main control module; the output detection module is used for monitoring an output state and comprises a sampling chip, and the sampling chip is connected with the main control module through an SPI bus; the output end of the main control module is connected with the input end of the output control module, the output control module comprises an alternating-current optical coupler and a silicon controlled rectifier, the output end of the alternating-current optical coupler is connected with the input end of the silicon controlled rectifier, and the output end of the silicon controlled rectifier is connected with the output end of the main control module. And the output end of the silicon controlled rectifier is connected with the traffic sign label to control the color change of the traffic sign label. Therefore, accurate distribution of road resources is realized, the traffic efficiency of the road is improved, the traffic pressure is effectively relieved, and the workload of manual intervention is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent traffic signal control, in particular to a control system for a traffic variable identification sign. Background Art

[0002] As urban traffic conditions become increasingly complex, new challenges are posed to the precise allocation of road resources. The use of variable lanes, tidal lanes, and other methods can effectively alleviate traffic pressure.

[0003] Currently, many traffic signals used on urban roads are products from many years ago. They only have networking and signal control functions, but not lane control capabilities. The cost of replacing a traffic signal as a whole is relatively high.

[0004] It can be seen that how to realize variable lanes and tidal lanes without replacing traffic signals is a very important research. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a control system for a variable traffic sign, which is characterized by comprising:

[0006] Main control module for processing data and controlling output;

[0007] A data input module for receiving data input, wherein an output end of the data input module is connected to an input end of the main control module;

[0008] An output detection module for monitoring the output state includes a sampling chip, wherein the sampling chip is connected to the main control module via an SPI bus; and

[0009] An output control module for controlling the color change of a traffic sign, wherein the output end of the main control module is connected to the input end of the output control module, the output control module comprises an AC optocoupler and a thyristor, the output end of the AC optocoupler is connected to the input end of the thyristor, and the output end of the thyristor is connected to the traffic sign to control the color change of the traffic sign.

[0010] Furthermore, the control system also includes a power supply module and a Beidou time synchronization module.

[0011] Furthermore, the Beidou timing module is connected to the serial port 5 of the main control module.

[0012] Furthermore, the output control module also includes a buffer, the main control module is connected to the buffer via a GPIO port, and the output end of the buffer is connected to the input end of the AC optocoupler.

[0013] Furthermore, the control system is provided with four groups of the output control modules, and each group of the output control modules is provided with two outputs, red and green.

[0014] Furthermore, the output detection module includes a voltage divider circuit and a current transformer, and a single output detection module can detect three outputs simultaneously.

[0015] Furthermore, the data input module includes IO level input, RS485 input, RS232 input and network port input.

[0016] Furthermore, the chip model of the RS485 input is ADM2483, which is connected to the serial port 6 of the main control module.

[0017] Furthermore, the chip model of the RS232 input is MAX3232ESE, which is connected to the serial port 2 and the serial port 1 of the main control module respectively.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model adds a control system for variable traffic signs on the basis of existing traffic signals. It controls the color change of traffic signs according to lane application scenarios to achieve accurate allocation of road resources, thereby improving road traffic efficiency, effectively alleviating traffic pressure, and reducing the workload of manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall hardware architecture disclosed in the embodiment of the utility model;

[0021] Figure 2 The hardware circuit schematic diagram of the output control module disclosed in the embodiment of the utility model;

[0022] Figure 3 The hardware circuit schematic diagram of the output detection module disclosed in the embodiment of the utility model;

[0023] Figure 4 It is a partial hardware circuit schematic diagram of the data input module disclosed in the embodiment of the utility model, showing the circuit schematic diagram of IO level input;

[0024] Figure 5 Part of the hardware circuit schematic diagram of the data input module disclosed in the embodiment of the utility model shows the circuit schematic diagram of RS485 input;

[0025] Figure 6 It is a partial hardware circuit schematic diagram of the data input module disclosed in the embodiment of the utility model, showing the circuit schematic diagram of RS232 input;

[0026] Figure 7 It is a partial hardware circuit schematic diagram of the data input module disclosed in the embodiment of the utility model, showing the circuit schematic diagram of the network port input;

[0027] Figure 8 The hardware circuit schematic diagram of the Beidou timing module disclosed in the embodiment of the utility model;

[0028] Fig. 9 This is a hardware circuit schematic diagram of the power module disclosed in the embodiment of the utility model.

[0029] In the figure: 1. Main control module; 2. Data input module; 3. Output detection module; 4. Output control module; 5. Power module; 6. Beidou time synchronization module. DETAILED DESCRIPTION

[0030] In order to make the technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments.

[0031] like Figure 1 As shown, the utility model aims to provide a control system for variable traffic signs, which mainly includes a main control module 1, a data input module 2, an output detection module 3, an output control module 4, a power module 5 and a Beidou time synchronization module 6. Specifically:

[0032] About the main control module 1: The main control module 1 is used to process data and control output, and is mainly responsible for flow data input, equipment time calibration, output control, output status acquisition, network communication and other functions. Preferably, the main control module 1 can use the low-power M6Y2C chip of Zhiyuan Electronics.

[0033] Regarding output control module 4: Figure 2As shown, the output control module 4 is used to control the color change of the traffic sign. The output end of the main control module 1 is connected to the input end of the output control module 4, and the output control module 4 includes a buffer, an AC optocoupler and a thyristor. Among them, the main control module 1 is connected to the buffer through the GPIO port to increase the driving ability of the control port; the output end of the buffer is connected to the input end of the AC optocoupler, the output end of the AC optocoupler is connected to the input end of the thyristor, and the output end of the thyristor is connected to the traffic sign to control the color change of the traffic sign. Preferably, the buffer model is SN74AHC540; the thyristor is an AC thyristor used as an electronic switch and the model is T1635-600G, and the thyristor output input and output are protected by a varistor and an RC absorption circuit in parallel. The controllable output is connected to the output terminal and connected to the traffic sign through a wire. Each control system is provided with four groups of output control modules 4, and each group of output control modules 4 is provided with red and green outputs.

[0034] Regarding output detection module 3: Figure 3 As shown, the output detection module 3 is used to detect the output status of each channel in real time. When the load voltage or current is abnormal, the log is recorded in time and an alarm is sent to the central platform. The output detection module 3 includes a sampling chip, which is connected to the main control module 1 through the SPI bus. Preferably, the sampling chip can use the effective value detection chip HT7038, which is connected to the main control module 1 through the SPI bus. It also includes a voltage divider circuit and a current transformer. Each output detection module 3 can detect three outputs at the same time. Preferably, the model of the current transformer is ZMCT364.

[0035] About data input module 2: Data input module 2 is used to receive manual input or detector flow data input, and the output end of data input module 2 is connected to the input end of main control module 1. Data input module 2 includes multiple input types such as IO level input, RS485 input, RS232 input and network port input. Specifically:

[0036] like Figure 4 As shown in the circuit schematic diagram of IO level input, the IO level signal input uses an optocoupler for signal isolation and level conversion. The optocoupler input is connected to the input terminal, and the output is connected to the GPIO module of the main control module 1. The isolated power supply is shared with the RS485 circuit.

[0037] like Figure 5 The circuit schematic diagram of RS485 input is shown, RS485 input adopts isolation mode, preferably, the chip model of RS485 input is ADM2483. The chip is connected to the serial port 6 of the main control module 1 through the serial port, and the output is connected to the output terminal through the self-recovery fuse, TVS tube, gas discharge tube, and termination resistor.

[0038] like Figure 6 The circuit schematic diagram of RS232 input shown in the figure uses industrial-grade chip MAX3232ESE for signal level conversion, which is used to connect serial port type detectors and module debugging. The chip is connected to serial port 2 and serial port 1 of the main control module 1, and the output side is connected to the terminal after passing through the TVS protection tube.

[0039] like Figure 7 The circuit schematic diagram of the network port input shown in the figure is used to connect a network port type detector. The circuit uses the DP83848K chip as the PHY chip.

[0040] About Beidou Time Synchronization Module 6: Figure 8 As shown, the Beidou time calibration module 6 is connected to the serial port 5 of the main control module 1, and can provide accurate time information for the system.

[0041] About power module 5: Fig. 9 As shown, the utility model adopts 220V AC power supply, selects 220V AC power supply, and uses TI's TPS564208 power chip to generate the 3.3V power supply required by the system.

[0042] The working principle of the utility model is as follows: after the control system is powered on, the application program reads the configuration file to obtain information such as the scheduling plan, daily plan, and configuration plan. If the read information is incorrect or the plan information corresponding to the current time cannot be found, the output is used for light-off control; if the current period is timed control, the output state is controlled according to the configuration plan; if the current period is adaptive control, the flow input of the input unit is detected through the network port, RS485, RS232, etc., and the main control module 1 calculates and selects a suitable plan for output control. If it is detected that the level signal input becomes a low level, the main control module 1 switches to the preset plan for the IO level signal input until the level signal returns to a high level.

[0043] The control system of the utility model is installed inside the signal machine cabinet, and the output terminal is connected to the variable sign according to the intersection requirements, and the data input module 2 is connected to the corresponding input interface according to the detector interface type. After the device is powered on, use a PC to log in to the system configuration page through the network port, and perform the necessary intersection channelization configuration, detector configuration, demand configuration, and solution configuration. After that, the device can operate normally according to the settings. When output abnormalities, manual control, equipment operation and other events occur during operation, the system will record the log and upload it to the central platform.

[0044] The control system of the utility model can be applied to various application scenarios such as variable lane control at intersections, tidal lane control, tidal variable lane control, ramp control, etc. Through the precise allocation of road resources, the traffic efficiency of the road is improved. At the same time, the adaptive control of the lane can reduce the workload of manual intervention, and can also efficiently respond to emergencies, which plays a huge role in solving traffic congestion.

[0045] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control system for a variable traffic sign, characterized in that: include: A main control module (1) for processing data and controlling output; A data input module (2) for receiving data input, wherein an output end of the data input module (2) is connected to an input end of the main control module (1); An output detection module (3) for monitoring the output state, comprising a sampling chip, wherein the sampling chip is connected to the main control module (1) via an SPI bus; and An output control module (4) for controlling the color change of a traffic sign, wherein the output end of the main control module (1) is connected to the input end of the output control module (4), the output control module (4) comprises an AC optocoupler and a thyristor, the output end of the AC optocoupler is connected to the input end of the thyristor, and the output end of the thyristor is connected to the traffic sign to control the color change of the traffic sign.

2. The control system of the variable traffic sign according to claim 1 is characterized in that: The control system also includes a power supply module (5) and a Beidou time synchronization module (6).

3. The control system of the variable traffic sign according to claim 2 is characterized in that: The Beidou time synchronization module (6) is connected to the serial port 5 of the main control module (1).

4. The control system of the variable traffic sign according to claim 1 is characterized in that: The output control module (4) also includes a buffer, the main control module (1) is connected to the buffer via a GPIO port, and the output end of the buffer is connected to the input end of the AC optical coupler.

5. The control system of the variable traffic sign according to claim 1 or 4, characterized in that: The control system is provided with four groups of output control modules (4), and each group of output control modules (4) is provided with two outputs, red and green.

6. The control system of the variable traffic sign according to claim 1, characterized in that: The output detection module (3) comprises a voltage divider circuit and a current transformer, and a single output detection module (3) can detect three outputs simultaneously.

7. The control system of the variable traffic sign according to claim 1, characterized in that: The data input module (2) comprises an IO level input, an RS485 input, an RS232 input and a network port input.

8. The control system of the variable traffic sign according to claim 7, characterized in that: The chip model of the RS485 input is ADM2483, which is connected to the serial port 6 of the main control module (1).

9. The control system of the variable traffic sign according to claim 7, characterized in that: The RS232 input chip model is MAX3232ESE, and is connected to the serial port 2 and the serial port 1 of the main control module (1) respectively.

Images