机动车鸣笛抓拍系统校准技术研究

机动车鸣笛抓拍系统是近年来交通管理部门在智能交通领域的一项创新性的应用.该系统中的声源定位单元通过传声器阵列技术实时捕捉机动车违法鸣笛信号并实时定位违法鸣笛车辆,首先通过对声源定位的算法仿真,验证了传声器阵列技术应用于机动车鸣笛抓拍系统的可行性,同时指出了鸣笛抓拍系统校准的重要性.接着,提出了一种机动车鸣笛抓拍系统的校...

Study on the calibration technology for the vehicle honking detection system

The vehicle honking detection system is an innovative application of traffic management department in the field of intelligenttransportation in recent years. The sound source location unit can capture the illegal honking signal of vehicle and locate the vehiclehonking source by microphone array technology. In this paper, the feasibility of microphone array technology applied to the vehiclehonking detection system is verified by simulation of sound localization algorithm, where we clearly point out the importance of calibrationof vehicle honking detection system. Then, two calibration methods of vehicle honking detection system are studied, which includeanechoic chamber testing and field testing. The validation in anechoic chamber mainly measures the location accuracy of microphonearray to the sound source, while, the field testing is designed to measure the accuracy rate, the capture rate and the false alarm rateunder different working conditions. According to the validation method, an experiment has been done and the results show the validity ofthis calibration technology in the application of vehicle honking detection system.