基于1f和2f双模的SF6纯度校正分解导数H2S光纤光声传感器

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-28 DOI:10.1063/5.0269814

Xinyu Zhao, Heng Wang, Yufu Xu, Chenxi Li, Hongchao Qi, Min Guo, Wei Peng, Ke Chen

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引用次数: 0

摘要

采用单光纤光声传感器（FOPAS）同时检测SF6纯度和分解衍生物H2S，并根据SF6纯度对光声测量结果进行校正。分别基于1f和2f跟踪频率和检测光声信号来识别SF6纯度和H2S气体浓度。对SF6纯度对谐振频率、光声激发强度和悬臂频率响应的影响进行了理论推导、仿真和实验验证。在80% ~ 100%范围内，谐振频率与SF6纯度呈线性关系，响应为1.923 Hz/%，最小纯度变化检测限为0.02%。基于t型光声电池的FOPAS对H2S的检测限为5 ppb，归一化噪声等效吸收系数达到4 × 10−10 cm−1 Hz−1/2 W。以纯度为97%的SF6为例，对校正前后FOPAS的频率响应和光声信号进行了评价。通过对共振频率和光声信号进行校正，H2S气体的检测精度提高了9%。采用SF6纯度与分解导数整体分析方法，实现了双状态参数的同时高精度、高灵敏度监测，为SF6气体绝缘设备潜在故障的准确预警提供了技术支持。

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Fiber-optic photoacoustic sensor with SF6 purity correction for decomposition derivative H2S based on 1f and 2f dual-modes

A single fiber-optic photoacoustic sensor (FOPAS) is applied for the simultaneous detection of the SF6 purity and decomposition derivative H2S, and the photoacoustic measurement results are corrected based on the SF6 purity. SF6 purity and H2S gas concentration are identified by tracking frequency and detecting photoacoustic signal based on 1f and 2f, respectively. The influence of SF6 purity on the resonance frequency, photoacoustic excitation intensity, and cantilever frequency response are theoretically derived, simulated, and experimentally verified. In the range of 80%–100%, there is a linear relationship between the resonance frequency and the SF6 purity, with a response of 1.923 Hz/% and a minimum purity change detection limit of 0.02%.The FOPAS based on the designed T-type photoacoustic cell achieves a detection limit of 5 ppb for H2S, and the normalized noise equivalent absorption coefficient of the FOPAS reaches 4 × 10−10 cm−1 Hz−1/2 W. Taking SF6 purity of 97% as an example, the frequency response of FOPAS and the photoacoustic signal are evaluated both before and after correction. By correcting the resonance frequency and photoacoustic signal, the detection accuracy of H2S gas is improved by 9%. By adopting the SF6 purity and decomposition derivative overall analysis method, simultaneous high-precision and high-sensitivity monitoring of dual-state parameters has been achieved, providing technical support for accurate early warning of latent faults in SF6 gas-insulation equipment.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.