Design of Atomic Force Microscope Photoelectric Sensing Circuit Based on Kalman Filter

IF 2.1 3区工程技术 Q2 ANATOMY & MORPHOLOGY

Microscopy Research and Technique Pub Date : 2025-05-31 DOI:10.1002/jemt.24883

Ke Xu, Honghao Qian

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Abstract

The noise performance of photoelectric sensing circuits hinders the performance development and intelligent application of atomic force microscopy systems. This article successfully developed an atomic force microscope photoelectric sensing circuit based on Kalman filtering. This article embeds the Kalman filter algorithm into the photoelectric sensing circuit to filter and denoise the output signal. This article uses the STM32 microcontroller to achieve analog-to-digital conversion, thereby reducing the attenuation and distortion of signal transmission. Specifically, the photoelectric sensing circuit has a detection limit of ±5 V, a fast response speed of about 10 us, and a laser wavelength detection range of 100–1100 nm. This method reduces the transmission attenuation of the output signal of the photoelectric sensing circuit. It improves the signal-to-noise ratio of the output signal without interfering with the performance of the photoelectric sensor itself. In addition, for the dynamic atomic force microscope system, this paper combines the photoelectric sensing circuit with negative feedback control to improve the negative feedback detection method of the dynamic working mode.

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基于卡尔曼滤波的原子力显微镜光电传感电路设计。

光电传感电路的噪声性能阻碍了原子力显微镜系统的性能发展和智能化应用。本文成功研制了一种基于卡尔曼滤波的原子力显微镜光电传感电路。本文将卡尔曼滤波算法嵌入到光电传感电路中，对输出信号进行滤波和去噪。本文采用STM32单片机实现模数转换，从而减少信号传输的衰减和失真。具体而言，光电传感电路的检测限为±5 V，响应速度快，约为10 μ s，激光波长检测范围为100-1100 nm。该方法减小了光电传感电路输出信号的传输衰减。在不影响光电传感器本身性能的前提下，提高了输出信号的信噪比。此外，对于动态原子力显微镜系统，本文将光电传感电路与负反馈控制相结合，改进了动态工作模式的负反馈检测方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Microscopy Research and Technique 医学-解剖学与形态学

CiteScore

5.30

自引率

20.00%

发文量

233

审稿时长

4.7 months

期刊介绍： Microscopy Research and Technique (MRT) publishes articles on all aspects of advanced microscopy original architecture and methodologies with applications in the biological, clinical, chemical, and materials sciences. Original basic and applied research as well as technical papers dealing with the various subsets of microscopy are encouraged. MRT is the right form for those developing new microscopy methods or using the microscope to answer key questions in basic and applied research.