FPGA development module based traffic signal control demonstration box

Abstract

The invention provides an FPGA development module based traffic signal control demonstration box. The demonstration box has an embedded signal machine system. The signal machine system is adopted by adopting an ARM, so that external software interfaces can be simplified. The compiling environment is an embedded Linux system established based on the ARM. Interfaces of an FPGA end are controlled through bottom layer drive. Chip transfer is realized through external serial-parallel connection and transfer connection to signal lights, a detector and a digital tube interface is achieved. Different timing demands can be met through programming by a user. The invention is not only a demonstration tool of a signal machine. Besides, hardware complexity is reduced greatly and power consumption is reduced, so that cost is saved.

Description

technical field [0001] The invention belongs to the technical field of the combination of intelligent traffic control and management, and relates to an experimental teaching device of a programmable multi-semaphore control timing scheme, which is used for the teaching of traffic engineering-related courses and demonstrates the working principle of the signal machine for students , on this basis, students can simulate the timing control scheme of signal lights under various requirements through programming. Background technique [0002] With the development of urban transportation, many enterprises and universities have invested in the R&D and experimentation of traffic signal control equipment, but the previous experimental device was only a simple display tool externally loaded on the signal machine, and users could neither test the experimental box on site. Perform programming control, replace the timing scheme, and there are problems such as huge volume, single simulation...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there is the patent CN201410354935.X which was applied by the applicant earlier, but it only has a simple signal light group and a canalization sign at the intersection, and the coil detector is outside, and only the external signal is connected. And the feeder, coil detector, will simulate the signal of the vehicle passing through. It is necessary to connect the signal machine or install the simulation software to display the control scheme of the packaged signal machine. This experiment box is just a portable display device for the signal machine.

[0004] In order to solve the problems that the existing experimental box can only be used as a display device for a signal machine, the teaching effect is poor, the price is expensive, and the user cannot change the control scheme at will, the purpose of the present invention is to provide a signal machine that can be used to demonstrate the signal machine for students in the classroom. The working principle, and the programmable and portable traffic signal control experimental teaching equipment that can change the timing scheme according to the needs. The device adopts FPGA control module and is equipped with ARM operating system, which can be executed in parallel without CPU, which simplifies the complex underlying control operation. Compared with the traditional industrial computer and peripheral interface chips, the integration degree is higher, the hardware cost is reduced, and more output ports can be driven. This device can combine 32 groups of light groups and detectors at 4 intersections to output at most, and the scalability of the system More flexible; the signal machine is connected to the PC through the Ethernet interface, and the program can be uploaded, compiled, and executed freely in the Linux environment, which is convenient for users to develop and modify the control program online; the experiment box can also be connected to the database, which is convenient for data The lower panel of the experimental device can provide pulse signal input, equipped with a coil detector light board, and the system can be adaptively controlled according to the current traffic flow

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