基于K210单片机控制的PWM波声源定位跟踪系统设计  

Design of PWM Sound Source Positioning and Tracking System Based on K210 Single Chip Microcomputer Control

作　　者：蔚志坚 WEI Zhi-jian(Shanxi Polytechnic College,Taiyuan,Shanxi,030006,China)

机构地区：[1]山西职业技术学院,山西太原030006

出　　处：《建材技术与应用》2023年第6期57-60,共4页Research and Application of Building Materials

摘　　要：基于一定数量的声学传感器麦克风阵列,对声场环境信号采样并计算以确定其声源位置的定位跟踪系统。整体设计以麦克风阵列采集声场环境下静止或运动物体发出的声音信号,传递到STM32单片机主控制核心,K210开发模块利用时延估计算法计算出麦克风阵列之间与物体声源之间的直线距离,再换算两者之间的夹角。PWM通过脉冲宽度波控制舵机带动红外激光仪转动指向声源位置,同时在OLED屏上实时显示出声源目标的准确角度及方位。结果表明:该系统对单声源处具有较高的精度定位,可用于无人摄影和交通路口疏导等方面的信息收集及定位。Based on a certain number of acoustic sensor microphone arrays,the acoustic field environmental signals were sampled and calculated to determine the location of its sound source.In the overall design,the microphone array is used to collect the sound signals from the stationary or moving objects in the sound field environment,which are transmitted to the STM32 MCU main control core.The K210 development module uses the time delay estimation algorithm to calculate the linear distance between the microphone array and the object sound source,and then converts the angle between the two.PWM uses the pulse width wave to control the steering gear to drive the infrared laser instrument to turn to the position of the sound source,and at the same time,the accurate angle and orientation of the sound source target are displayed on the OLED screen in real time.The results show that the system can locate the single sound source with high accuracy,and can be used for information collection and location of unmanned photography and traffic intersection guidance.

关 键 词：K210芯片 PWM波 麦克风阵列 时延估计算法 

分 类 号：TN912.3[电子电信—通信与信息系统]