基于LabVIEW的单向阀振动信号采集关键技术设计

Design of the key technology of the signal acquisition for check valve based on LabVIEW

ZPM泵中单向阀在工作过程中极易损坏,为了促进生产安全,提高效率。在分析了该单向阀实际振动情况的基础上,结合信号分析与处理技术,以LabVIEW为开发平台,以动态信号采集卡、双核高性能控制器和PXI机箱为硬件基础,对ZPM泵单向阀振动信号采集的关键技术进行了设计。在设计的过程中采用了模块化编程思想、多线程并行处理技术,同时还根据实际需求进行了循环缓冲区的设计以及数据储存策略的设计。经试验,该监测系统与LMS国际公司的振动信号分析仪相比,所采集的信号精度满足要求,系统可以长期连续稳定运行,能实现无人值守的自动化监测。

ZPM check valve in the pump is easily damaged in the process of work ,in order to promote production safety and efficiency .On the analysis of the check valve in the ZPM pump working condition ,that combined the technology of signal analysis and processing , based on the LabVIEW , with dynamic signal acquisition card , dual‐core high‐performance controller and PXI chassis as the foundation of hardware ,the key technology of signal acquisition for ZPM one‐way valve is designed .In the process of design ,the modular programming idea and the mufti‐thread processing technology are adopted ,and the designs of the loop buffer and of the data storage strategy are also carried out ,at the same time .In addition ,it also gives the corresponding program block diagram and code .After the test ,the monitoring system is compared with the vibration signal analysis instrument of LMS International Corporation .The collected signal precision meets the requirement . Thus , the system has a long‐term and continuous stable operation to achieve unattended automatic monitoring .