摘要
针对恶劣环境下远程未知监测区域,进行现场数据采集比较困难和危险的问题,以无线传感器网络技术为基础,设计了一种高精度数据采集系统。系统的无线声音传感器网络节点以FPGA为主控芯片,系统采用了模块化设计的思想,包括含有实现节点与上位机通信功能的USB数据接口模块、调理转换声音信号的采集调理模块、无线通信的无线收发模块、存储数据的存储模块、负责节点供电的电源管理模块。测试结果表明,系统最终可实现在24 k Hz的采样率下对监测区域内频率为1 k Hz的不同声音信号高精度采集。
For remote unknown monitoring area in the harsh environment,the problem of on-site data acquisition is more difficult and dangerous,based on the technology of wireless sensor network,a kind of high-accuracy data ac-quisition system is designed. The system design of wireless voice sensor network node platform with FPGA as the main control chip,the system uses a modular design idea,containing nodes implementing the communication with the host computer’s USB data interface module,conditioner converts the sound signal acquisition conditioning mod-ules,wireless transceiver modules for wireless communications,data storage memory module and the module re-sponsible for power supply node management. The test results show that the system can be achieved in the final 24 kHz sampling rate for the monitoring area of 1 kHz frequency different sound signals of precision acquisition.
出处
《电子器件》
CAS
北大核心
2016年第1期180-185,共6页
Chinese Journal of Electron Devices
基金
国家自然科学基金重点项目(51275491)