{"title":"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","authors":"Haomao Wang, Tong Zhai, Yifan Wang, Youze Liu, Rui Zhou, Xin Peng, Zhiguo Zhang","doi":"10.1364/oe.537627","DOIUrl":null,"url":null,"abstract":"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 16<jats:italic>μ</jats:italic><jats:italic>ε</jats:italic>, strain range of ±2000<jats:italic>μ</jats:italic><jats:italic>ε</jats:italic>, 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.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"35 1","pages":""},"PeriodicalIF":3.2000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Real-time sensing approach for optical frequency domain reflectometry using an FPGA-based high-speed demodulation algorithm\",\"authors\":\"Haomao Wang, Tong Zhai, Yifan Wang, Youze Liu, Rui Zhou, Xin Peng, Zhiguo Zhang\",\"doi\":\"10.1364/oe.537627\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"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 16<jats:italic>μ</jats:italic><jats:italic>ε</jats:italic>, strain range of ±2000<jats:italic>μ</jats:italic><jats:italic>ε</jats:italic>, 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.\",\"PeriodicalId\":19691,\"journal\":{\"name\":\"Optics express\",\"volume\":\"35 1\",\"pages\":\"\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2024-08-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optics express\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1364/oe.537627\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics express","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/oe.537627","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
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.
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.