Construction of traffic control vehicle type identification system based on piezoelectric sensing and laser ranging

This study constructed a vehicle type identification system that based on piezoelectric sensing and laser ranging, which could automatically identify vehicle types even the vehicles were in high-speed driving state, thus solved an urging problem of traffic management departments. The vehicle type identification system in this study used laser ranging sensor to measure the height of vehicles and in the meantime, it used driving speed and the laser frequency of laser ranging sensor to obtain vehicles' length. Vehicles' widths were measured by managing the pictures captured by webcam. Based on the vehicle type identification system that used piezoelectric film traffic sensor, this study additionally installed a laser ranging sensor and webcam, and used laser ranging sensor to obtain vehicles' height and used webcam to capture pictures to obtain vehicles' width, which did not only obtain chassis information of vehicles in real time, but also obtained vehicles' length, width and height at the same time. It covered main features of vehicles as well as improved veracity and reliability of vehicle type identification system. © 2015 American Scientific Publishers All rights reserved.