Self-marked HCN gas based FBG demodulation in thermal cycling process for aerospace environment

Fan, Xiaojun; Jiang, Junfeng; Zhang, Xuezhi; Wang, Shuang; Yang, Yining; Sun, Fangfang; Zhang, Jiande; Guo, Chao; Shen, Jingshi; Wu, Shichen

doi:10.1364/oe.26.022944

Cited by 21 publications

(12 citation statements)

References 23 publications

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“…The resonators were characterised using a tuneable laser with a tuning range from 1520 nm to 1630 nm, variable gain preamplified photodiodes and a highly stable thermostat stage. Reference gas cells (HCN and C2H2) were used for an in-situ SI traceable wavelength calibration [5]. Figure 1 shows an example of the normalised transmissions spectrum of three ring resonators with rip waveguide design.…”

Section: Perspective and First Resultsmentioning

confidence: 99%

C4.1 Photonic Thermometry at PTB – Promising First Results for Contact Temperature Metrology Utilizing Optical Sensors

Krenek¹,

Eisermann²,

Schmid³

et al. 2021

SMSI 2021 - Sensors and Instrumentation

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Photonic sensors offer new possibilities for the metrological temperature determination in specific applications including high electric fields or harsh environments. Within two EU projects the PTB develop and validate different photonic thermometers from 0 °C to over 1500 °C. The aim of this work is to develop and validate novel accurate photonic thermometers with uncertainties in the mK range and sensors for application within harsh environments at high temperatures. We show first results using silicon ring resonators which achieve high quality factors (Q ≈ 160 000) and over 15 dB filter contrast.

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Section: Perspective and First Resultsmentioning

confidence: 99%

C4.1 Photonic Thermometry at PTB – Promising First Results for Contact Temperature Metrology Utilizing Optical Sensors

Krenek¹,

Eisermann²,

Schmid³

et al. 2021

SMSI 2021 - Sensors and Instrumentation

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“…Hidrogen sianida (7; 10; 26; 27; 32; [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] atau biasa disebut formic anammonide, asam hidrosianat, atau asam sianida yang merupakan suatu monobasa dari asam Lewisboron lemah yang dapat digunakan sebagai penyepuhan emas,dan pembuatan pewarna prussian blue (blau), (108) . Asam sianida akan larut dalam air (109; 110) , senyawa ini didalam air akanmembentuk ion CNdan ion H + .Senyawa dengan rumus kimia HCN cairan tak bewarna dan sangat beracun.…”

Section: Resultsunclassified

Analisis Molekular dan Karakteristik Hidrogen Sianida (HCN)

Husna¹,

Zainul²

2019

Preprint

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Hidrogen sianida dalam air membentuk asam lemah bersifat toksik. Tujuan review ini untuk menganalisis molekular dan transpor elektron hidrogen sianida. Metode yang digunakan adalah penggambaran molekul dengan aplikasi Chem Office versi 15.0 , untuk mengetahui transpor ion asam sianida yaitu dengan parameter konduktivitas, viskositas, mobilitas ion, dan gerakan hanyut.Hasil yang didapat yaitu struktur molekul asam sianida pada analisis molekuler 2D, dan bentuk molekul asam sianida dalam 3D. Berdasarkan metode ini diperoleh energi kinetik rotasi senyawa 2,0466 kcal/mol,. Untuk konduktivitas, kecepatan hanyut, gerakan ion,dilakukan dengan menggunakan metode perhitungan dengan rumusan hasilnyadan beberapa soal yang dibuatkan grafiknya Analisis jari-jari atom hidrogen dengan carbon pada Chemdraw 3D didapatkan sebesar 1,1 A, dan jari jari atom carbon dengan nitrogen masing-masingnya sebesar 1,1 A. Data yang didapat pada Analisa MM2 dynamics HCN adalah interaction time 0.024 , 0.026, 0.028, 0.030, total energy 0.048, 0.082, potensial energy 0.38, 0.045, 0.016, 0.091.sifat dari asam sianida diantaranya massa molar 27,03 g/mol, densitas 0,687g/mL, viskositas : 201 μPa s. Sifat termodinamika hidrogen sianida adalah ∆G (enegi gibs) 143,1 kj/mol entropi (∆S) 113,01 J/kmol , entalpi pembentukan standar (∆fH) -141,2 kJ/mol , entalpi pembakaran standar (∆cH) 426,5 kJ/mol dan kecepatan hanyut yang didapat berdasarkan perhitungan sebesar 2,33 V/cm.

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“…Therefore, there is a high demand for the FBG interrogation with high performance in the thermal cycling environment. The tunable F-P filter combined with the self-marked absorption lines of hydrogen cyanide (HCN) gas is a promising approach [11]. The fundamental absorption lines of atoms and molecules are insensitive to temperature, this characteristic of HCN gas supplies a good choice for wavelength reference [12].…”

Section: Introductionmentioning

confidence: 99%

A Method of HCN Gas Spectrum Denoising and Baseline Removal Used for FBG Interrogation

et al. 2020

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Hydrogen cyanide (HCN) gas based fiber Bragg grating (FBG) interrogation is a promising approach in thermal cycling environment. However, the HCN spectrum suffers from strong noise and baseline wander induced by the interrogation system, which limits the measurement stability and reliability. In this paper, we propose an integrated method for spectral denoising and baseline removal to improve the interrogation performance. The method combines the classical empirical mode decomposition (EMD) with the recently developed convolution window (CW) filtering. After the HCN spectrum is decomposed by EMD, the noise and baseline components are extracted from the intrinsic mode functions via a ''multiband'' filtering approach. Verification experiments are performed using HCN gas cells with different absorption spectra. The results show that the proposed method is able to remove both noise and baseline with minimum signal distortion. Compared with other methods, the optimal interrogation stability with 25 Torr HCN gas cell is improved from ±1.43 pm to ±0.87 pm. For the 100 Torr HCN gas cell, the optimal interrogation stability is improved from ±1.75 pm to ±0.99 pm. In addition, the proposed method also improves the reliability of the interrogation system in the case of large light attenuation.

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Self-marked HCN gas based FBG demodulation in thermal cycling process for aerospace environment

Cited by 21 publications

References 23 publications

C4.1 Photonic Thermometry at PTB – Promising First Results for Contact Temperature Metrology Utilizing Optical Sensors

C4.1 Photonic Thermometry at PTB – Promising First Results for Contact Temperature Metrology Utilizing Optical Sensors

Analisis Molekular dan Karakteristik Hidrogen Sianida (HCN)

A Method of HCN Gas Spectrum Denoising and Baseline Removal Used for FBG Interrogation

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