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Pedestrian Traffic Light Sequence

Pedestrian Traffic Light Sequence

The light source is with ultra-high brightness LED imported, which is high brightness and long service life.The shell of light is with a one-time aluminum die-casting and engineering plastics (PC) to inject molding, which is durable.The overall circuit has a regulator tube to protect, so it is safe and long-term. Even if a single LED is damaged, which won’t affect the overall work.The images is with red characters still and green dynamic people. The meaning of display is easier to understand.

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pedestrian traffic light sequence

 

Product Parameter of pedestrian traffic light sequence

Pedestrian talking crossing Traffic Signals (2).png 

Installation diagram of pedestrian traffic light sequence

 Pedestrian talking crossing Traffic Signals (4).png

pedestrian crossing.jpg

pedestrian crossing sign .jpg




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Traffic countdown basic functions:

First, display function

    The digital traffic countdown timer displays digits (0 to 9) in the form of a standard 7-segment code, the color of which should be the same as that of the corresponding road traffic light, and the value corresponds to the remaining time of the signal phase and is decremented in seconds. The maximum number of digits for a digital display is 9, the maximum number of digits for a two-digit display countdown timer is 99, the maximum number of digits for a two-digit digital traffic countdown is 199, and the maximum number of digits for a three-digit display countdown timer is 999.

    The simulated traffic countdown timer displays the remaining time of the phase of the corresponding signal with a uniformly decreasing rectangular light, the color of which should be consistent with that of the corresponding road traffic light.

    Second, communication traffic countdown timer

    1, communication protocol

    The data communication protocol between the communication traffic countdown timer and the road traffic signal controller is as follows

 

Communication frequency 2400 baud/4800 baud/9600 baudCommunication frequency 2400 baud/4800 baud/9600 baud
Data bit8 bitStop bit1 bit
Start bit1 bit Input signalRS-485 signal

 

    2, communication requirements

    The communication traffic countdown timer displays the remaining time of the phase of the corresponding signal according to the command of the road traffic signal controller. The communication between the countdown timer and the road traffic signal controller may be performed once per second or once during the signal phase transition. The communication method must ensure real-time response when the signal phase changes.

    When the road traffic signal controller starts, the countdown display should show a black screen; when the communication is normal, the display of the countdown timer should be consecutively decremented, no garbled characters, lost code, etc.; when the communication is interrupted, or the road traffic signal control machine is transferred from automatic control When manually controlled, the countdown timer should be able to display a black screen within 2 seconds.

    3, learning traffic countdown timer

    1, test signal requirements

    On the learning type traffic countdown control board, test points corresponding to the display colors should be reserved. The test points should output the level synchronized with the display color (effective at high level) for test use.

    2, learning status

    When the road traffic signal control machine is turned on, the signal cycle is changed or the traffic signal control machine is transferred from the automatic control to the manual control, the learning traffic countdown timer should enter the learning state. The time and display of learning status should meet the following requirements:

    1) The learning time of the learning traffic countdown timer does not exceed 2 signal cycles;

    2) The traffic countdown should show a black screen during learning.

    3, timing

    After entering the normal timing state, the display of the learning traffic countdown timer should meet the following requirements:

    1) The display should be synchronized with the phase of the corresponding signal and the time error must not exceed 0.3 s;

    2) The traffic countdown should be consecutively decremented, with no garbled or missing codes;

    3) When the traffic signal controller interrupts the output or switches to yellow flash control, the traffic countdown timer should be able to display a black screen at the end of the current signal phase.


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  • Shaanxi Yiyuan Traffic Technology Engineering Co.,Ltd

    Tel: +86-29-88270591

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    QQ: 1829090767

    Zip: 710065

    Address: No.5, Production Road, West Thermal Power Plant, West Section Of Hongguang Road, Weiyang District, Xi'an, Shaanxi, China

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