基于LXI总线的多通道振动信号测试系统设计

针对某些大型复杂装备的振动信号采集需求,测控场景需对上百通道的振动信号实现同步测量;而单一采集仪器很难满足百道测试需求,因此,文章研制了一种可扩展的多通道振动信号采集与分析系统;该系统采用LXI总线架构,其主控计算机与设备和设备间均采用LAN进行数据通信;振动测量模块采用了大动态范围数据采集技术,且主控系统软件采用分布式数据管理模式;最终,主控计算机以仪器驱动函数方式通过通信协议合理调控采集模块参数,并通过综合数据分析得到振动信号的故障诊断结果;通过对某型高速列车的轴箱轴承进行振动信号采集与数据分析,得到某一轴承出现了故障,验证了所设计测试系统的有效性。

Multi-channel vibration signal test system based on LXI bus

In response to the demand for the acquisition of vibration signals of some large-scale and complex equipment, the measurement and control scenarios need to achieve simultaneous measurement of vibration signals of hundreds of channels. However, it is difficult for a single acquisition instrument to meet the requirements of a hundred-channel test. Therefore, an expandable multi-channel vibration signal acquisition and analysis system is developed in this paper. The system adopts the LXI bus architecture, and its host computer and equipment and its equipment all use LAN for data communication. The vibration measurement module uses a large dynamic range data acquisition technology, and the main control system software adopts a distributed data management mode. Finally, the main control computer reasonably regulates the parameters of the acquisition module through the communication protocol in the form of the instrument drive function, and can obtain the fault diagnosis result of the vibration signal through comprehensive data analysis. Through the vibration signal collection and data analysis of the axle box bearing of a certain type of high-speed train, it is found that a certain bearing has a fault, which verifies the validity of the designed test system.