基于Lab VIEW的多通道木材声发射信号采集系统

Multi-Channel Wood Acoustic Emission Signal Acquisition System Based on Lab VIEW

为采集木材在长时间载荷作用下的声发射信号,设计了一种多通道的高速数据采集系统.首先,利用NI USB-6336高速采集卡和声发射传感器等硬件搭建4通道声发射信号硬件采集平台;其次,基于Lab VIEW设计人机界面及软件控制系统;最后,通过木材三点弯曲试验来验证该采集系统的效用.试验结果表明,该4通道的信号采集系统能有效地采集与自动存储木材在损伤过程中的声发射信号.作为一种木材声发射信号采集平台,该系统能够为木材声发射信号的采集与分析提供基本保障.

A multi-channel high speed data acquisition system is designed to collect acoustic emission signals of wood under long-term loading.Firstly,a four-channel acoustic emission signal hardware acquisition platform is built by using NI usb-6336 high-speed acquisition card,acoustic emission sensor and other hardware.Secondly,man-machine interface and software control system are designed based on Lab VIEW.Finally,the utility of the acquisition system is verified by wood three-point bending test.The experimental results show that the four-channel signal acquisition system can effectively collect and automatically store acoustic emission signals of wood during the damage process.As a kind of wood acoustic emission signal acquisition platform,this system can provide basic guarantee for the acquisition and analysis of wood acoustic emission signal.