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

H. B. Wang,

Yufu Xu

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(17)

Published: April 28, 2025

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

Language: Английский

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

H. B. Wang,

Yufu Xu

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(17)

Published: April 28, 2025

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

Language: Английский

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