Self-adaptive traffic signal countdown display device and control method thereof

Abstract

The invention provides a self-adaptive traffic signal countdown display device and a control method of the self-adaptive traffic signal countdown display device. The self-adaptive traffic signal countdown display device comprises a system scheduling module which is connected with a power source management module, a light color detection module and a trigger signal detection module respectively, a countdown information receiving module and a countdown information display module. The countdown information receiving module is connected with a wireless module, a network module, a power carrier communication module and an RS-485 communication module respectively. According to the self-adaptive traffic signal countdown display device and the control method of the device, a design framework that a high-voltage module is isolated from a low-voltage module is adopted, and the high-voltage part and the lower-voltage part are isolated through an optocoupler, so that system stability is enhanced, and convenience is brought to maintenance. The self-adaptive traffic signal countdown display device aims to be simplified in circuit and stable in performance and conduct display smooth transition when work modes are switched, and the traffic signal countdown device which is high in price performance ratio and complete in function is provided for the intelligent traffic control and management field.

Description

technical field [0001] The invention belongs to the field of intelligent traffic control. Background technique [0002] At present, the traffic signal countdown display device is widely used in the intelligent traffic signal light control system, and its function is mainly to display the remaining time of the current traffic red, yellow and green signals. The device currently adopts many technical methods, such as single learning type, single RS-485 communication type, single signal trigger type, trigger learning combination type, communication learning combination type, etc. The single-learning countdown display device is suitable for environments without communication cables, which saves laying costs. The disadvantage is that the display information often appears in digital disorder when the period is switched or in the self-sensing and adaptive control of the coordinated system; the single-communication type is suitable for countdown In the case of changeable information...

AI Technical Summary

Problems solved by technology

From the perspective of the product itself, they are all products with stable performance, and the following shortcomings generally exist in terms of application functions: 1) Can not support communication trigger learning self-adaptation at the same time; 2) Communication mode must increase communication cables; 3) Does not support simple Traffic Guidance Tips

[0003] 1. Patent No. CN102938212A "Communication Road Traffic Signal Countdown Display" provides a communication type road traffic signal countdown display. This invention does not involve learning and trigger control methods, and cannot solve the problem that the countdown is extinguished when communication is interrupted;

[0004] 2. Patent No. CN102750831A "Road Traffic Signal Countdown Display Device", CN103150917A "Road Traffic Signal Countdown Display Device" and Patent No. CN202177976U "A Traffic Signal Light Countdown Device" provide a learning type road traffic signal countdown display device respectively. The invention does not involve the solution of the communication part, and cannot provide a real solution to the problem of smooth display of the countdown when the phase changes suddenly

[0005] 3. Patent No. CN102682614A "Countdown Display and Display Control Method of Trigger Control Display" provides a countdown display with trigger control display, which does not involve communication and learning methods, making the application flexibility slightly insufficient

[0006] 4. Patent No. CN202177976U "A Traffic Signal Light Countdown Device" provides a learning-type countdown timer based on a dot-matrix display, and its disadvantages are similar to those of the second type of countdown timer

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