Changeable Message Sign

WHAT IS A PCMS(pulse code modulation screen)?

PCMS is the English abbreviation of Portable changeable message sign, also known as dynamic message board. Dynamic message board refers to the use of remote control devices to display real-time changes on the road ahead due to weather, natural disasters, traffic accidents, etc. Road traffic signs for driving environment. There are many kinds of information stored, and the controller can instantly display some kind of information in the sign manually or automatically according to the change of driving environment, and inform and warn the driver to take corresponding safe and reasonable driving measures.

WHEN SHOULD A PCMS BE USED?

(1) Display the status of the road. Announce information such as construction operations, water damage and landslides in the road section ahead, closed or open roads, and speed limit.

(2) Show traffic conditions. Announce the traffic conditions of the road and ramps ahead, such as traffic accidents and traffic jams.

(3) Show the weather conditions. Notify the weather conditions that are not conducive to driving ahead, such as rain showers, strong winds, heavy fog, or road surface snow, icing, etc.

Through the information display of roads, traffic and climate conditions,can control the speed of vehicles and adjuste to promptly remind drivers to pay attention to the danger ahead, so as to achieve the goal of traffic safety and smooth flow.

PCMS SCREEN CHARACTERISTICS

The principle of the PCMs (pulse code modulation screen) screen is that in the optical fiber communication system, the optical fiber transmits the binary light pulse “0” code and “1” code, and the binary digital signal on and off the light source to generate it. Sampling, quantizing and encoding a continuously changing analog signal, pulse code modulation can generate digital signal. So this electrical signal call digital baseband digital signal generated by PCM terminal electric machine.

Mainly used in the communication system of electric power, railway, highway and other industries

The difference between the two scenarios

LED Portable changeable message sign and vehicle movable message board signs

LED Portable changeable message sign and vehicle movable message board signs are delicate, flexible and light. They are suitable for trailer-mounted vehicles. They can place anytime and anywhere on the scene to direct high-speed LED display. 
It is suitable for traffic management departments to carry out operations ,such as drunk driving investigation and punishment at night. Set up a portable led traffic display in a prominent place in front of the checkpoint, and ensure that there is enough vehicle avoidance space around, so that drivers can understand the situation on the spot and guide driving correctly according to the display screen to ensure road traffic safety.

If you want to know more about Portable changeable message sign, click here to view the video

Fixed Variable Electronic Information Screen

The fixed variable electronic information screen is the leading information transmission method on the highway. Because of its small size, it is usually possible to replace the cross-road gantry or the embedded mast as the bracket of the electronic LED display.

The main monitoring computer realizes remote control through the communication network. Through the information displayed on the LED display, all kinds of traffic news can release to the driver in time; to guide the traffic in a normal and orderly manner.
 

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