An Automatic Vehicle Classification System

摘要

This manuscript documents the development of an automatic surface transportation identification system to break down vehicle noise sources, by class, into categories of truck, bus, car, and motorcycle. Such a classification would enable the Army, U.S. Environmental Protection Agency and communities to see what contribution each category of vehicles makes to the overall noise at a monitored site. The system designed for this function was based on a configuration of photoelectric emitters and receivers set up along the road at a monitoring site. This system uses hardware-implemented logic and performs a series of algorithms on the outputs from the sensors created when a vehicle interrupts the beams as it passes through the system. The unit was tested in a scaled model system; test results indicate that the system is feasible for full scale use. In addition, various portions of the system design can be used by other vehicle study projects, e.g. for projects concerned with vehicle speed or for traffic study projects that require an axle counter or vehicle height indicator. (Author)