高速USB2.0接口的音频多通道采集无线传输系统

Audio multi-channel collecting wireless communication system based on USB2.0 interface

为实现野外环境下多通道声阵列远程采集与声场分析,基于USB2.0高速接口,设计实现了单节点最多96个音频信道的同步采集,并基于Wi-Fi无线传输协议802.11n,实现了采集数据的远程无线传输。测试结果表明,本系统的USB2.0高速接口有效数据传输速度最小峰值读/写达到26.5MBps/22.5MBps,无线传输速度稳定均值达到106Mbps。系统除采集卡外,其他设备均采用COTS产品,具有低成本、短研发周期和高可用性的优势。

To meet the needs of multi-channel acoustic array long-distance acquisition and acoustic filed analysis, the synchronous sampling of 96 audio frequency channels was designed and implemented based on the USB2. 0 high-speed interface, and data wireless transmission was implemented with standard Wi-Fi （Wireless Fidelity） protocol and 802. l ln criterion. The test results indicate that the minimum peak values of effective transmission speed of USB2. 0 high-speed interface in the system reach 26.5 MBps and 22.5 MBps for reading and writing and steady mean value of wireless transmission arrives at 106 Mbps. The implemented system adopts Commercial Off The Shelf （COTS） products except acquisition cards, which has marked advantages of low cost, short research period and high usability.