The Implementation Of Vehicle Detection Technology Based On Loop Induction Coil

With the continuous improvement of car ownership, traffic accidents caused by speeding have occurred, not only to society and individuals caused huge economic losses, but also seriously endanger people's lives and safety of travel. Based on the study of a variety of typical vehicle detector, the paper proposes a vehicle speed sensor coil-based method, and the corresponding system design and implementation.This article examines the methods and related key technologies and introduces the structure and design principle of the system. System data acquisition module is implemented by CPLD, the system will be collected frequency data correlation match, find out the time corresponding to the peak, and thus the vehicle speed is detected. This paper gives the overall design of DSP-based vehicle speed system, initially completed the schematic design of the program, and simulated in the software environment of the vehicle speed implementation process.Articles innovation lies:Combine annular induction coil vehicle detector works on the various potential sources of electromagnetic interference are analyzed for the most important sources of electromagnetic interference automotive ignition system a mathematical model, and the use of CST Microwave Studio software package computer finite element simulation analysis. The simulation results show:Auto Ignition System annular coil over the sensor, the radiated electromagnetic ignition system produced seriously affected the normal work loop vehicle detectors, so you must take certain measures to shield and paper further explores the loop coil sensor anti-interfere with effective measures.