Enhanced Sensitivity of Gas Pressure Sensor Based on FPIs With Harmonic Vernier Effect

IF 5.6 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-29 DOI:10.1109/TIM.2025.3565337

Qichang Jiang;Su Sheng;Fulin Chen;Zinan Tu;Yuanqing Wang;Xinyu Liu;Jian Wen;Chao Jiang

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引用次数: 0

Abstract

This article presents a high-sensitivity fiber optic gas pressure sensor based on the first-order harmonic Vernier effect (FHVE). The sensor comprises two parallel Fabry-Perot interferometer (FPI): a sensing cavity and a reference cavity. The sensing cavity, formed by a single-mode fiber (SMF) and a capillary tube filled with polyvinylidene fluoride (PVDF) film, creates a closed-air microcavity (

$214~\mu $

m in length) that also reflects light. The reference cavity, constructed by fusing an SMF at both ends of a capillary tube, ensures high stability. By matching the free spectral ranges (FSRs) of the sensing cavity (FPI1) and reference cavity (FPI2), the traditional Vernier effect achieves a gas pressure sensitivity of −58.8 nm/MPa, 19.73 times higher than that of FPI1 alone. Furthermore, by setting the FSR of FPI1 to approximately half that of a modified reference cavity (FPI3), the FHVE enhances sensitivity to −83.03 nm/MPa, 27.86 times greater than FPI1. The sensor demonstrates minimal temperature cross-sensitivity, with gas pressure variations of only 2.44 kPa/°C. Key advantages include high sensitivity, robust mechanical strength, compact size, ease of fabrication, and cost-effectiveness, making it ideal for pressure monitoring in harsh environments such as offshore oil drilling and underwater operations.

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基于谐波游标效应的fpi气体压力传感器灵敏度提高研究

提出了一种基于一阶谐波游标效应的高灵敏度光纤气体压力传感器。该传感器包括两个平行的法布里-珀罗干涉仪（FPI）：一个感测腔和一个参考腔。传感腔由单模光纤（SMF）和充满聚偏氟乙烯（PVDF）薄膜的毛细管组成，形成一个封闭的空气微腔（长度为214~\mu $ m），也能反射光。参考腔，通过在毛细管两端融合一个SMF来构建，确保了高稳定性。通过匹配感测腔（FPI1）和参考腔（FPI2）的自由光谱范围（FSRs），传统游标效应获得了−58.8 nm/MPa的气体压力灵敏度，比单独使用FPI1高出19.73倍。此外，通过将FPI1的FSR设置为修改后参考腔（FPI3）的一半左右，FHVE将灵敏度提高到−83.03 nm/MPa，是FPI1的27.86倍。该传感器具有最小的温度交叉灵敏度，气体压力变化仅为2.44 kPa/°C。其主要优点包括高灵敏度、坚固的机械强度、紧凑的尺寸、易于制造和成本效益，使其成为海上石油钻井和水下作业等恶劣环境下压力监测的理想选择。

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

IEEE Transactions on Instrumentation and Measurement 工程技术-工程：电子与电气

CiteScore

9.00

自引率

23.20%

发文量

1294

审稿时长

3.9 months

期刊介绍： Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.