Communication type road traffic signal countdown display

Abstract

The invention discloses a communication type road traffic signal countdown display which comprises a microcontroller, a communication module, a constant current driving module, a fault detection module and a signal countdown display panel. The microcontroller is connected with the communication module and connected to the signal countdown display panel through the fault detection module and the constant current driving module, and the communication module is connected with a signal machine through a communication line. The communication type road traffic signal countdown display has the advantage that only one group of communication lines is needed during implementation to totally solve the problem that signal lamps and a countdown timer cannot be real-time and synchronous and provides technical support for variable period and self-adaptation of signal machines in large and medium-sized cities in the aspect of display.

Description

technical field [0001] The invention relates to a communication-type road traffic signal countdown display, which belongs to the technical field of traffic signal control. Background technique [0002] In recent years, with the development of China's economy, the number of urban vehicles has increased sharply, and the problem of urban traffic congestion has become an urgent problem to be solved. Urban development has higher and higher requirements for road traffic. The research and development of intelligent transportation systems is the solution. One of the main ways to solve this problem is that the "variable period" and "adaptive" signals of modern traffic in large and medium cities have greatly improved the efficiency of road traffic. [0003] Since the current countdown timer can only be used for "fixed period" traffic signal control, once the timing scheme of the signal light changes in real time, the countdown timer still displays the timing scheme of the previous cyc...

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Problems solved by technology

[0003] Since the current countdown timer can only be used for "fixed cycle" traffic signal control, once the timing scheme of the signal light changes in real time, the countdown timer still displays the timing scheme of the previous cycle, and the time when the signal light appears and the time displayed by the countdown cannot be synchronized

At present, the countdown timer only has a single display function, and there is no corresponding constant current control on the display panel. It cannot cope with changes in temperature or power supply, which seriously affects the service life of the countdown timer display. At the same time, there is no status monitoring of the equipment. When a failure occurs, manual on-site is required Only when the fault can be found, the equipment cannot be repaired in time

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