测试科学与仪器2026，Vol.17Issue(2)：355-366,12.DOI:10.62756/jmsi.1674-8042.2026030
FPGA-LabVIEW原子力显微镜振动信号实时低噪声自制检测系统
Real-time FPGA-LabVIEW homebuilt system for noise reduction in AFM imaging
摘要
Abstract
Atomic force microscopy(AFM)probe vibration monitoring is essential for achieving accurate nanoscale imaging and reliable signal interpretation.This paper presents a low-noise vibration detection method based on a real-time FPGA-LabVIEW homebuilt system.The FPGA receives signals from a quadrant photodiode(QPD),performs analog-to-digital conversion and parallel processing,and integrates cascaded digital filters for noise reduction.A finite impulse response(FIR)low-pass filter extracts the static spot position,while an infinite impulse response(IIR)band-pass filter preserves the probe's resonance vibrations.Compared with conventional analog detection,the proposed system reduces background noise by approximately 50%(measured as 50.23%),enhances the signal-to-noise ratio(SNR)from 15 dB to 20 dB,and maintains FPGA signal-processing latency below 5 μs.This work demonstrates that the proposed real-time FPGA-LabVIEW AFM noise optimization system significantly improves signal-to-noise ratio and real-time performance,providing a practical solution for high-precision,low-noise AFM imaging.关键词
原子力显微镜/FPGA-LabVIEW系统/实时信号处理/低噪声测量/数字滤波Key words
atomic force microscopy(AFM)/FPGA-LabVIEW homebuilt system/real-time processing/noise reduction/digital filters引用本文复制引用
孙秋园,马宗敏,刘俊,姚志飞,孙健恒,赵波慧,张珂童,姚浩然,魏久焱,温焕飞,唐军..FPGA-LabVIEW原子力显微镜振动信号实时低噪声自制检测系统[J].测试科学与仪器,2026,17(2):355-366,12.基金项目
This work was supported by the National Key R&D Program of China(No.2022YFC2204104),NSFC Projects of International Cooperation and Exchanges(No.62220106012),and Key Lab of Quantum Sensing and Precision Measurement,Shanxi(No.201905D121001) （No.2022YFC2204104）
