基于LabVIEW的多通道噪声采集系统设计

A Design of Multi-Channel Noise Acquisition System Based on LabVIEW

摘要: 本文基于NI公司PXI4497数据采集卡，利用LabVIEW研发了风洞内噪声测量试验并行数据采集及实时存储程序，完成了高速数据采集系统的实现和应用。通过试验观察，数据量的存储达到了硬盘读写速度的极限，根据试验特点提出了基于磁盘阵列的更多通道更高采样率的程序设计思想。并成功多次应用于航空工业领域的开口及闭口风洞噪声动态测量试验中，满足了预期的科研要求，为后续的噪声试验数据的处理工作打下了坚实的基础。
>This paper develops a set of noise measure, data acquisition and real-time storage program used in wind tun-nel test based on PXI4497 data acquisition card and LabVIEW. High speed data acquisition system is completed. Through experimental observation, the data stored in the hard disk speeds up to the read and write limit. According to this test characteristic, a design of more channels and higher sampling rate program based on the disk array is proposed and successfully used in noise dynamic measure tests in open and close wind tunnels in aeromagnetic industrial domain. Expected scientific requirement is fulfilled. This is a solid foundation for the noise test data processing in the future.