Treatment of Underground Dust Concentration Detection Signal and FPGA Implementation

Abstract

In view of the special environmental interference of coal mine dust concentration signal acquisition, it is necessary to analyse the characteristics and filter the noise signal mixed into the system in the process of coal dust concentration signal acquisition by sensors. Combining with the characteristics of actual coal dust concentration signal, IIR filter is designed by bilinear Z-transform method, and the IIR digital filter is implemented by using VHDL hardware description language in FPGA. Finally, the performance of the filter is verified by simulation using MATLAB and Modelsim.