基于FPGA的振动信号采集处理系统设计

Design of vibration signal acquisition and processing system based on FPGA

在振动信号采集和处理系统设计中,信号的处理时间与可靠性决定着系统应用的可行性。本文设计了一种基于FPGA的振动信号采集处理系统,该系统通过振动信号采集电路、抗混叠滤波电路、AD采样电路将电荷信号转化为数字信号送入FPGA,在FPGA处理设计中利用数据流控制方法并行实现了信号的采样和处理,并在数据存储和访问过程中采用时钟时标方法判断信号采样过程中的数据丢失情况,有效提高了振动信号处理的实时性及可靠性。本设计在真实环境中进行了验证,系统运行稳定可靠,满足各项技术应用要求。

In the design of vibration signal acquisition and processing system, the processing time of the signal determines the system sampling frequency, the parallel implementation of the signal processing and signal acquisition process can fulfill the real-time requirement and effectively improve the efficiency of the system. This paper describes the design of a vibration signal acquisition and processing system based on FPGA, the system transfers charge signal into digital quantity into FPGA by vibration signal acquisition circuit, anti-aliasing filter circuit, AD sampling circuit. In the FPGA circuit, we utilize data flow control method for implementing signal sampling and signal processing in parallel, in order to verify the effectiveness of the sampling data in data storage and access, clock time mark method is used to judge the situation of data missing.