自适应抗混叠滤波器在数据采集中的应用

Design of Anti-aliasing Filter for Data Acquisition

针对数据采集系统在采样过程中的混叠现象,选用MAX293作为抗混叠滤波器,提出了独特的自适应抗混叠滤波方案,阐述了其在数据采集过程中实现的原理,设计了相应的硬件实现电路。实验结果表明:本文设计的抗混叠滤波器适应于风机在线监测和故障诊断系统中的数据采集。

Aiming at the aliasing phenomenon in data acquisition sampling process, we apply MAX293 as anti-aliasing filter. The implementation of self--adapting anti--aliasing filtering during the data acquiring process is presented in this paper. It also designed the hardware circuitry. The result shows that the design of the anti-aliasing filter suit the fans on-line monitoring and data acquisition in fault diagnosis system.