FPGA‐Accelerated Transmission Fluctuation Autocorrelation Spectrum Technique for Rapid Particle Size Measurement

ABSTRACT This paper introduces an FPGA‐accelerated transmission fluctuation autocorrelation spectrum technique for real‐time particle size measurement. The system leverages the simplicity of the optical path in the transmission fluctuation autocorrelation spectrum method combined with the parallel processing and pipeline technology of an FPGA to significantly enhance signal processing speed and data throughput. The FPGA implements modules for signal acquisition, autocorrelation processing, data preprocessing, and serial port communication, all parallelized to boost performance. Experimental results demonstrate that the system can effectively measure particle sizes of industrial glass beads with good real‐time performance, stability, and repeatability. While some dispersion in measurements is observed, the overall results align with expectations, showcasing the feasibility and potential of this technique for particle size measurement.