| In recent years,with the continuous improvement of economic level,security industry booming.To meet the public's growing demand for home security,various products have poured into the general consumer market.At present,the typical security products such as video surveillance,function is relatively single,lack of the ability to actively perceive the surrounding environment.Intelligent home has become an important outlet in the field of security,the concept of the core is the living environment of autonomous perception and intelligent decision-making.Based on this,a set of hearing modules used in the Home IP Camera(IPC)is designed,which detects the noise disturbance in the environment,and transmits the azimuth information of the source to the main module of the camera to realize the intelligent steering tracking of the limited angle lens.IPC with hearing function can cover 360 of monitoring area without panoramic technology,and its practical value is higher.The hearing system takes the sound signal collected by the microphone array as the data source,and uses the passive source localization method to obtain the azimuth information of the target.In this paper,the realization principle of all kinds of mainstream array positioning algorithms is studied,and the advantages and disadvantages are comprehensively compared.In combination with the hardware condition and the suitable scene,an improved TDoA localization algorithm is proposed,and the feasibility and performance of the algorithm are analyzed and evaluated strictly.In this paper,the optimization of the algorithm porting MCU platform is discussed systematically,and a portable,efficient and robust sound source localization software module is implemented,which provides a reference for the design of Low-cost and reliable location scheme. |
