利用基于 FPGA 的高速解调算法实现光学频域反射测量的实时传感方法

IF 3.2 2区 物理与天体物理 Q2 OPTICS Optics express Pub Date : 2024-08-30 DOI:10.1364/oe.537627
Haomao Wang, Tong Zhai, Yifan Wang, Youze Liu, Rui Zhou, Xin Peng, Zhiguo Zhang
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引用次数: 0

摘要

光学频域反射测量法(OFDR)在结构健康监测中举足轻重。然而,由于硬件限制和复杂工艺带来的解调速度限制,实时传感仍具有挑战性。为解决这一问题,我们提出了一种基于 FPGA 的高速解调算法,该算法采用了二维 FFT 和频域交叉相关算法。实验证明,我们的系统达到了以下规格:传感长度 50 米,空间分辨率 6.4 毫米,应变分辨率 16με,应变范围 ±2000με,实时传感速率 24 Hz。我们认为这是一种利用有限硬件资源进行实时 OFDR 传感的新方法,具有更广泛的应用潜力。
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Real-time sensing approach for optical frequency domain reflectometry using an FPGA-based high-speed demodulation algorithm
Optical frequency-domain reflectometry (OFDR) is pivotal in structural health monitoring. However, real-time sensing remains challenging owing to the demodulation speed limitations imposed by hardware constraints and intricate processes. To address this, we propose an FPGA-based high-speed demodulation algorithm employing a 2D FFT and frequency-domain cross-correlation algorithm. The experiments demonstrate that our system achieves the following specifications: sensing length of 50 m, spatial resolution of 6.4 mm, strain resolution of 16με, strain range of ±2000με, and real-time sensing rate of 24 Hz. We present what we believe is a novel approach for real-time OFDR sensing with limited hardware resources and potential broader applications.
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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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