Reliability Demodulation Algorithm Design for Phase Generated Carrier Signal

Hou, Changbo; Zhang, Jie; Yuan, Yonggui; Yang, Jun; Yuan, Libo

doi:10.1109/tr.2021.3125068

Cited by 20 publications

(2 citation statements)

References 37 publications

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“…where E 0 is the electric field of the incident light and r is the reflectance of uwFBG. ∆f is the frequency difference between two optical signals, because two beams are generated from the same light source in the uwFBG sensing system, with the same frequency, ∆f = f 1 − f 2 = 0. ϕ 12 is the initial phase of the interference pulse, ∆ϕ is the sensor phase change caused by the external environment, and the vibration phase signal can be demodulated by arctangent demodulation algorithm [28]. When we monitor n uwFBG sensors at sampling point ti, the demodulated result of n-sensor is expressed as x nti .…”

Section: Principlementioning

confidence: 99%

Intrusion Monitoring Based on High Dimensional Random Matrix by Using Ultra-Weak Fiber Bragg Grating Array

Huang

et al. 2023

Photonics

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In order to ensure that a perimeter security system can work effectively, a convenient and effective event detection algorithm has an important engineering significance. Given the above background, in this paper, we propose a high reliability intrusion event recognition method and vibration sensing system, based on ultra-weak fiber Bragg grating array, by using high dimensional random matrix. We obtain a high sensitivity optical interference signal by constructing a patch-matched optical interference system, then compose the demodulated interference signal into a high-dimensional random matrix. The statistical characteristics of the matrix for the Marcenko-Pastur (M-P) law and ring law are used to confirm the presence of intrusion events efficiently, which can reflect the limit spectrum distribution of the high-dimensional random matrix; meanwhile, the abnormal state quantity and moment are obtained. Further, the average spectral radius value is used to judge the fault cause. Field experimental results show that the proposed method can effectively obtain the correct monitoring data for the sensor array. By comparing the monitoring results of normal operation and crusher operation, we can detect the intrusion event in 4.5 s, and the accuracy rate can reach more than 90%, which verifies that the proposed high-dimensional random matrix analysis method can work properly, proving a practical engineering application prospect.

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Section: Principlementioning

confidence: 99%

Intrusion Monitoring Based on High Dimensional Random Matrix by Using Ultra-Weak Fiber Bragg Grating Array

Huang

et al. 2023

Photonics

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“…Traditionally in the PGC approach, a high frequency, sinusoidally modulated laser emission wavelength is used to address the FP cavity with the resulting transfer function demodulated with Bessel function analysis coupled with either an arctangent or differentialand-cross-multiplying algorithm [19,20]. Despite the benefits previously mentioned, the demodulation accuracy of PGC is adversely affected by laser intensity disturbances, phase delays [19] and phase modulation depth [21], additionally, the wavelength modulation frequency dictates the minimum cavity length that can be interrogated.…”

Section: Introductionmentioning

confidence: 99%

Optical fibre pressure sensing using a frequency modulated laser-based signal processing technique

Barrington

James

Kissinger

et al. 2023

Meas. Sci. Technol.

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Range resolved interferometry (RRI) applied to the interrogation of an extrinsic Fabry-Perot based pressure sensor in laboratory and wind tunnel environments is presented. A simple, compact sensor head design was fabricated and subsequently characterised using RRI, which was shown to have a sensitivity of 1.627×10−3 rad/Pa with a noise standard deviation of 9 Pa over a data rateof 1.5 kHz. When installed in a high-lift wing for surface pressure evaluation during wind tunnel testing, the approach outlined here was able to perform as well as a conventionally employed commercial device for relative static pressure measurements.

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A PGC demodulation scheme based on the Lissajous ellipse fitting for homodyne interferometer without using second harmonic carrier signal

Zhang,

Xiao,

Fang

2024

Applied Acoustics

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Reliability Demodulation Algorithm Design for Phase Generated Carrier Signal

Cited by 20 publications

References 37 publications

Intrusion Monitoring Based on High Dimensional Random Matrix by Using Ultra-Weak Fiber Bragg Grating Array

Intrusion Monitoring Based on High Dimensional Random Matrix by Using Ultra-Weak Fiber Bragg Grating Array

Optical fibre pressure sensing using a frequency modulated laser-based signal processing technique

A PGC demodulation scheme based on the Lissajous ellipse fitting for homodyne interferometer without using second harmonic carrier signal

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