An Electronic Traffic Police System Based on Microphone Array

Abstract

The invention relates to an electronic traffic police system which comprises a whistle sound acquisition unit, a whistle sound recognition unit, a whistle sound source location unit, a position measurement unit, a whistle sound source tracking unit, an image acquisition unit and a license plate recognition unit, wherein the whistle sound acquisition unit, the whistle sound recognition unit, the whistle sound source location unit, the position measurement unit, the whistle sound source tracking unit, the image acquisition unit and the license plate recognition unit are based on a microphone array and are successively connected. The whistle sound source tracking unit and the license plate recognition unit are connected with a central control unit. According to the invention, coordinate measuring is carried out on the whistle sound source location information and the license plate location information of a vehicle; the sound source coordinate information acquired by the whistle sound source tracking unit is transmitted to an image acquisition system; license plate capturing is carried out in a designated range, which reduces the hardware storage pressure and improves the processing efficiency of the system; by increasing a weight searched in the designated area, the whistle sound source positioning accuracy can be effectively improved; considering the timing correlation characteristic of a whistle signal, a whistle sound source is tracked in real time; the processing speed is fast; and vehicle violation information is sent to a traffic management department in real time.

Description

technical field [0001] The invention belongs to the technical field of vehicle monitoring, and relates to a monitoring technology for vehicles honking in violation of regulations on road sections where hooting is prohibited, in particular to an electronic traffic police system. Background technique [0002] With the development of the road traffic network, some road sections are laid in some schools, hospitals and other places where it is not suitable to whistle, but the phenomenon of illegal whistle will occur on these road sections. In response to this phenomenon, passive measures such as setting up road signs that prohibit honking are relatively weak, and direct prohibition of vehicles will sometimes cause other problems. In order to be able to improve the noise environment of the no-sounding road section, the manual supervision that has to be adopted will waste a lot of manpower and material resources. For general conventional shooting and monitoring equipment, only the...

AI Technical Summary

Problems solved by technology

[0002] With the development of the road traffic network, some road sections are laid in some schools, hospitals and other places where it is not suitable to whistle, but there will be violations of the whistle on these road sections

In response to this phenomenon, passive measures such as setting road signs that prohibit honking are relatively weak, and direct prohibition of vehicles will sometimes cause other problems

In order to improve the noise environment of the no-sounding road section, manual supervision will waste a lot of manpower and material resources

For general conventional shooting and monitoring equipment, only the picture of the vehicle can be taken, and the recorded sound is blurred or even unable to record the sound, and it does not have the sound positioning function of the offending vehicle; and the existing electronic traffic police system, when dealing with the vehicle When the whistle monitoring problem is encountered, traditional sound source location technology and license plate recognition technology are used. This type of system is only a simple combination of two subsystems, without realizing the transmission and sharing of information between subsystems; secondly, the existing electronic traffic police system The whistle sound source localization system uses the traditional passive sonar target localization algorithm in the field of underwater acoustic engineering, and does not consider the movement characteristics of the car on the road, because the sound source in the ocean moves irregularly in three-dimensional space, and Vehicles move regularly in the designated area on the road, so the passive sonar target positioning algorithm will perform an equal-probability airspace search in space, and the positioning accuracy of the whistle sound source is not high

Images