Before the appearance of space-time synchronous
Solar Traffic Signs, LED screens were basically used for display. One LED screen cost hundreds of thousands of pieces at every turn, which was expensive. Therefore, the appearance of space-time synchronous display of
Solar Traffic Signs greatly reduced traffic costs.
Technical description of
Solar Traffic Signs synchronously displayed in space and time.
1. The text part of the road name with the light-emitting sign adopts the semi-transparent panel type
Solar Traffic Signs technology.
2. The overall logo layout adopts active lighting technology, among which the time digital display is embedded next to the important node distance.
3.
Solar Traffic Signs light control program: It can automatically turn on/off the sign light-emitting unit according to the surrounding light changes.
4. Display size: XXXmm*XXXmm, composed of 2 XXXmm*XXXmm full-color P8 display modules. (customizable).
5. Screen light-emitting tube: red LED wavelength 624±2.5nm, single-tube brightness ≥3000mcd; yellow LED wavelength 590±2.5nm, single-tube brightness ≥3000mcd; green LED wavelength 525±2.5nm, single-tube brightness ≥5000mcd.
6. Control method:
(1) Function realization: GPS binding positioning is implemented for the installation point of
Solar Traffic Signs, and the distance between each target point and the installation point of the sign is calculated. The method is to measure the current average speed, calculate the time to reach the target point, and update the arrival time data in real time according to changes in road conditions, compare the data with the temporary time values of smooth, slow, and congestion, and pass the green, yellow, and red on the display. to synchronize the display.
(2) Communication system:
Solar Traffic Signs has a built-in SIM card and uses 4G network communication to realize real-time data exchange between the control module and AutoNavi road condition cloud data.
(3) Automatic timing function: The system should have automatic timing function. In 24 hours a day, the timing error of
Solar Traffic Signs system equipment should not exceed 1.0 seconds. The system center management platform shall perform equipment clock calibration on the connected front-end equipment at least once a day.
(4)
Solar Traffic Signs system dimming function:
Solar Traffic Signs should be equipped with an environmental illuminance detection device to adjust the luminous intensity of the luminous pixels according to the environmental illuminance, so as to avoid the formation of glare when the illuminance is low at night and affect the visual reading of information. The brightness of
Solar Traffic Signs should be adjusted to less than 10% of the maximum brightness during dimming control.
(2) Time-space synchronization displays the characteristics and advantages of
Solar Traffic Signs:
The distance between the installation point of
Solar Traffic Signs and important nodes, and the estimated arrival time are effectively unified in the
Solar Traffic Signs page, providing motor traffic participants with real-time data reference of time and space, improving the expected driving trajectory in time, and improving traffic management. The department relieves traffic congestion, reasonably allocates regional traffic flow, and provides effective macro planning.
