摘要
提出建立超大孔径声阵列来提高声探测装备的探测性能。为了能够简化系统布设,提出采用无线连接的方式组成声阵列。采用MSP430单片机作为中心处理器设计了无线传声器,为了保证各无线传声器同步进行数据采集采用了BD2和GPS双模授时技术。最后分别采用无线声阵列和有线声阵列进行了试验,采用MUSIC(Multiple Signal Classification)算法进行定向,结果表明无线声阵列能实现定向功能但精度稍差,在下一步的工作中采用相位一致性好的传声器能进一步提高精度。
Using super aperture microphone array to improve the ability of acoustic detect weapon is proposed. In order to simplify the arranging of microphone, consisting of a microphone array using a wireless connection is proposed. Wireless mi- crophones are designed using MSP430 microcontroller as the central processor. In order to ensure synchronous data acquisi- tion of all wireless microphones, BD2 and GPS timing technology is used. Finally, an experiment is carried out using wire- less acoustic array and cable acoustic array. The direction of sound source is found out using MUSIC （ Multiple Signal Classi- fication） algorithm. The results show that the wireless acoustic array can realize the directional function but is less precise, in the next step of work, using the microphone phase consistency can further improve the accuracy.
出处
《电声技术》
2015年第3期44-47,共4页
Audio Engineering
关键词
无线传感器
无线声阵列
授时同步
MSP430
wireless microphone
wireless acoustic array
timing and synchronization
MSP430
