FBG Demodulation System Based on EMD Denoise

Zhi-quan, 李志全 Li; Ping, 曹平 Cao; Ya-nan, 王亚男 Wang; Zhengjun, 刘正君 Liu; Jing-ru, 张景茹 Zhang

doi:10.3788/gzxb20103908.1367

Cited by 2 publications

(1 citation statement)

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“…When FBG is loaded under complex temperature field [3] [ 4] , gratings in different positions inside it will change in a varying manner, changing it into a chirped FBG (CFBG) [5] . Compared with the bandwidth of different pitchs, the gap between their reflective spectrums is smaller, so all spectrums will overlap with each other to form a whole broadening reflective spectrum [6][7] [8] . The increment of the whole reflective spectrum is of resonant wavelength in different pitchs [9] [10] [11] …”

Section: Theories Analysismentioning

confidence: 99%

A demodulation method of Temperature-Spectrum width based on Chirped fiber grating

Chen

Zhi-Quan

et al. 2016

MATEC Web of Conferences

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Abstract. Based on spectral reflection characteristics of chirped FBGs, a demodulation method for complex temperature fields is proposed in this paper. Relationships between the reflective spectrums and the temperatures are investigated through theoretical analyses. Testing results are acquired from a FBG sensing model which is designed according to the newly-developed method. A simulation to get the relationships between reflective spectrums and temperatures is set which shows that this demodulation method is feasible and its demodulation precision is beyond +/-1°C. The method provides a new method for analyzing complex temperature fields.

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Section: Theories Analysismentioning

confidence: 99%

A demodulation method of Temperature-Spectrum width based on Chirped fiber grating

Chen

Zhi-Quan

et al. 2016

MATEC Web of Conferences

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Denoising Method for Calibration Data of Landing Guidance Radar Based on EMD and Wavelet

Sang

Zhao

2014

AMR

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The noise resulted in the calibration process of the landing guidance radar can cause serious accidents. Analyse the principle of the EMD and wavelet denoising method. Points out the deficiencies of pure EMD or pure wavelet denoising method. Propose a denoising method based on EMD and wavelet. Improved the discriminanting method for high or low frequency components and the discriminanting method for wavelet thresholding. First EMD the signal, then denoise the high frequency components by wavelet, finally, combined the low frequency components and the denoised high frequency components to get the denoised data.

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FBG Demodulation System Based on EMD Denoise

Cited by 2 publications

References 0 publications

A demodulation method of Temperature-Spectrum width based on Chirped fiber grating

A demodulation method of Temperature-Spectrum width based on Chirped fiber grating

Denoising Method for Calibration Data of Landing Guidance Radar Based on EMD and Wavelet

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