The invention discloses a novel bus contact interface circuit of an intelligent traffic light system and mainly provides the bus contact interface circuit for communication between a signal lamp controller and an upper computer of the intelligent traffic light system at a road intersection. The novel bus contact interface circuit is mainly composed of a bus controller, a bus transceiver, a microprocessor, an optoelectronic isolator, a switching power supply module and various anti-interference filter circuits. The novel bus contact interface circuit is characterized in that traffic flow detection devices are installed on east-west roads and north-south roads of crossroads to detect the traffic flow information in real time, the information is input to a single-chip microcomputer to be processed, the red light and green light switching time of bi-direction signal lamps and the waiting time are controlled through the single machine programming technology according to the traffic flow information, and meanwhile the single-chip microcomputer controls a region CAN bus communication system composed of CAN bus controllers to conduct data transmission; in addition, a PC is communicated with a single-chip microcomputer controller on a node through a serial port to achieve sending and receiving of the data information on a CAN bus. The novel bus contact interface circuit is simple in structure, working is stable, control is accurate, and therefore the novel bus contact interface circuit can be widely applied to various bus interface communication circuits.
Novel bus contact interface circuit of intelligent traffic light system
2015-05-20
Patent
Electronic Resource
English
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