Multi-lane overspeed detecting system based on field programmable gate array (FPGA)

Abstract

The invention relates to a multi-lane overspeed detecting system based on a field programmable gate array (FPGA), belonging to an industrial measurement and control technology and a video and image processing technology. In the multi-lane overspeed detecting system, an FPGA chip is utilized as an acquiring and processing unit of two paths of digital images to realize signal detection and remote image transmission for violated overspeed vehicles. The signal sources of the system are two paths of charge coupled device (CCD) analog video signals which are converted into digital video signals after entering an analog-to-digital (A / D) converter. The multi-lane overspeed detecting system provided by the invention is characterized in that the FPGA operates a detecting algorithm for detecting whether a vehicle passes; when the first path of video signal detects that the vehicle passes, the time when the vehicle enters a monitored area is obtained; next, at the moment when a second path video end detects that the vehicle passes, the time when the vehicle leaves the monitored area is obtained; and according to the time difference, whether the vehicle is overspeed and violated is judged, thepicture of the overspeed and violated vehicle is shot, and relevant violated information is stored.

Description

technical field [0001] The invention relates to an FPGA-based multi-lane speeding detection system, which belongs to industrial measurement and control technology and video image processing technology, and uses FPGA chip as a two-way digital image acquisition and processing unit to realize signal detection and image detection of illegal speeding vehicles Send remotely. Background technique [0002] Traffic safety is an eternal research topic of traffic engineering, and has been highly valued by relevant people at home and abroad. In recent years, my country's transportation industry has made great progress. At the same time, the means of transportation have also increased at an unprecedented rate, resulting in more and more frequent traffic accidents. This not only endangers the lives and property of the people, but also causes the country to suffer. Unnecessary economic loss; There are many factors that affect traffic safety, among which speeding vehicles are one of the mos...

AI Technical Summary

Problems solved by technology

Because the working environment is in the wild, in order to ensure the reliability of the system’s operation, the design should consider the working characteristics of wind and dust, rain and snow, high temperature resistance, and severe cold resistance, as well as the automatic start function of power failures, crashes and other failures; therefore, this method Complicated implementation and difficult operation;

[0005] ②Radar speed monitoring system, which uses radar signals to monitor speeding vehicles. On many highways, you can see the big sign of the radar speed measurement area; however, it cannot monitor speeding vehicles outside the radar speed measurement area; moreover, the radar speed measurement cannot directly Obtain the license plate number of speeding vehicles; in bad weather, the error of radar speed measurement sometimes reaches 20%; it is easily affected by the weather, and the measurement accuracy is low;

[0006] ③Infrared and laser detection, this method is theoretically a method with high detection accuracy, but facing the situation of multiple roads, multiple vehicles and multiple pedestrians at the intersection, the efficiency of point measurement cannot meet the regulatory requirements

At the same time, laser detection will cause great damage to human eyes;

[0007] ④ CCD speeding monitoring system based on video detection. The video detection system judges whether there are speeding vehicles through the detection of video images. Since the system needs to be installed on highways or designated roads or on moving vehicles, the working environment is outdoors. , the intersection computer adopts industrial computer, and all the design of the signal and image transmission system is completely designed according to the industrial standard, so the investment is relatively large; in addition, the stability performance of the system is not very ideal in actual operation, which leads to the unsatisfactory practical performance;

[0008] ⑤Based on the DSP+FPGA video detection scheme, the DSP+FPGA video detection scheme reported in many literatures now uses DSP to replace the industrial computer to realize video acquisition management, image processing, overspeed judgment, etc.; due to image reading, storage and other reasons, the speed of these systems cannot meet the actual requirements of the project

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