Study On The Application Of Acoustics Recognition Technique In Inteltgent Transportation System

Nowadays, accompanied with the quick increase of economy in our country, the automobile amount and population increase rapidly and the environmental contamination problem caused by the traffic jamming and traffic accident significantly influenced our life and economy development. For the prominent contradiction of resources and environment and the limitation of space for increasing road facilities, city' s traffic problems can only be solved according to two principles: rational planning of road construction and active development of intellect traffic system (ITS). ITS is an interplay platform, it improves the traffic effect through in-situ monitoring and rational branching of vehicles. At the present time, the traffic condition is monitored mainly by setting adequate vehicle monitors. By this means, traffic information can be sent to the monitoring center so that the management of traffic condition can be optimized. However, existing vehicle monitors are not enough to meet the need.In this thesis, the feasibility of the acoustics recognition technique of vehicle' motion was investigated; its mathematical model was analyzed, a base machine was made based on this technique and series experiments had been performed upon it. The thesis including the following sections:(1) Acoustics recognition technique of vehicle' motion can be built upon the base of voice recognition technique. It was found that implicit Markovian model could be well applied to acoustics recognition technique of vehicle' motion.(2) A base machine of vehicle monitor was built based on the acoustics recognition technique of vehicle' motion. Series experiments were carried out on it. The structure of base machine and experimental process were introduced, and experiment results were analyzed carefully. Some problems of this base machine were solved.(3) The lab-constructed base machine of vehicle monitor can work...