庄涵1 陈检3 邱健1 骆开庆1 彭力2 徐炳权1 刘冬梅1 韩鹏1 陈淼1
（1.华南师范大学电子科学与工程学院（微电子学院）/
广东省光电检测仪器工程技术研究中心，广东 佛山 52822 5
2.华南师范大学物理学院，广东 广州 510006
3.广东工业大学实验教学部，广东 广州 510006）
摘要：为提高多角度动态光散射（MDLS）的数据可靠性与测量准确性，研制一种基于现场可编程门阵列（FPGA）与非易失性存储（NAND FLASH）的多通道DLS自相关器。该多通道DLS自相关器利用FPGA实现多通道并行同步采集机制与自相关计算；采用RAM数据缓存单元和NAND FLASH存储模块构建双级协同存储架构与“采集-缓存-存储-回读”四阶段数据传输架构。通过4种单分散、双峰聚苯乙烯标准颗粒悬浮液的实验结果表明，单分散颗粒粒径分布结果趋近于真实的颗粒粒径分布，双峰分布颗粒体系粒径分布反演结果与真实分布较为吻合，表明该多通道DLS自相关器能有效提升MDLS测量的可靠性与准确性，为复杂颗粒体系粒径分析提供可靠的硬件支持。
关键词：多角度动态光散射；多通道自相关器；粒径分析；现场可编程门阵列；时间同步
中图分类号：TP23 文献标志码：A 文章编号：1674-2605(2026)02-0002-09
DOI：10.12475/aie.20260202 开放获取
Multi-channel Dynamic Light Scattering Autocorrelator Based on FPGA and NAND FLASH
ZHUANG Han1 CHENJian3 QIU Jian1 LUO Kaiqing1 PENG Li2
XU Bingquan1 LIU Dongmei1 HAN Peng1 CHEN Miao1
(1.School of Electronic Science and Engineering (School of Microelectronics), South China Normal University/ Guangdong Provincial Engineering Research Center for Optoelectronic Instrument, Foshan 528225, China
2.School of Physics, South China Normal University, Guangzhou 510006, China
3.Department of Experimental Teaching, Guangdong University of Technology, Guangzhou 510006, China)
Abstract: To improve the data reliability and measurement accuracy of multi-angle dynamic light scattering (MDLS), a multi-channel DLS autocorrelator based on field-programmable gate array (FPGA) and non-volatile memory (NAND FLASH) is developed. The proposed multi-channel DLS autocorrelator utilizes the FPGA to achieve a multi-channel parallel synchronous acquisition mechanism and autocorrelation calculation. A dual-level collaborative storage architecture and a four-stage data transmission architecture consisting of “acquisition-caching-storage-readback” are constructed using RAM data caching units and a NAND FLASH storage module. Experimental results obtained with four types of monodisperse and bimodal polystyrene standard particle suspensions show that the measured particle size distribution for monodisperse particles approaches the true distribution, and the inversion results for bimodal particle systems are in good agreement with the true distributions. These findings demonstrate that the developed multi-channel DLS autocorrelator can effectively enhance the reliability and accuracy of MDLS measurements, providing reliable hardware support for particle size analysis of complex particle systems.
Keywords: multi-angle dynamic light scattering (MDLS); multi-channel autocorrelator; particle size analysis; field-programmable gate array(FPGA); time synchronization
