基于时域和频域的层积材强度检测系统

Laminated veneer lumber strength testing system based on time domain and frequency domain analyses

为对层积材强度进行无损在线检测,设计了一种基于时域和频域分析法的层积材强度检测系统,并阐述了该系统的检测原理、系统构成和软件实现。该系统采用研华开发的PCI-1710HG采集卡进行数据采集,以工控机为数据处理核心,通过提取振动信号对数衰减率和试件各阶固有频率实现层积材强度的检测。最后通过验证实验证明,该系统设计是可行的。

In order to test the strength of laminated veneer lumber nondestructively and online, a new detecting system which can test the strength of laminated veneer lumber based on time domain and frequency domain analyses was introduced in this paper. Data acquisition card PCI-1710HG was selected to collect data information. Industrial computer was used as the core processor. By extracting vibration signal logarithmic decrement and each natural frequency of samples, the strength of laminated veneer lumber can be tested. Testing principle, system constitutes, software design and experiments were discussed. Also this system designing was validated by experiments.