激光与光电子学进展, 2020, 57 (19): 190603, 网络出版: 2020-09-23 复制并引用该论文  本文已被引 2 次  被引通知

图 & 表

图 1. WFBG传感系统图及信号时序图。(a) WFBG传感系统示意图;(b)时序

Fig. 1. Diagram of WFBG sensing system and signal sequence. (a) Diagram of WFBG sensing system; (b) time sequence

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图 2. 在不同调制脉宽、不同WFBG个数下基于AOM调制信号或CWT提取的干涉区间。(a)基于AOM调制信号在300 ns调制脉宽下提取的2-WFBG干涉区间;(b)采用CWT在300 ns调制脉宽下提取的2-WFBG干涉区间;(c)采用CWT在450 ns调制脉宽下提取的2-WFBG干涉区间;(d)采用CWT在300 ns调制脉宽下提取的5-WFBG干涉区间

Fig. 2. Interference intervals obtained based on AOM modulation signal and CWT for different modulation pulse widths and different numbers of WFBGs. (a) Interference intervals obtained based on AOM modulation signal for 300 ns modulation pulse width and 2-WFBG; (b) interference intervals obtained by CWT for 300 ns modulation pulse width and 2-WFBG; (c) interference intervals obtained by CWT for 450 ns modulation pulse width and 2-WFBG; (d) interference intervals obtained by CWT for 300 ns modulation pul

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图 3. 同一振动源下,针对不同调制脉宽采用不同方法提取干涉区间特征值,并经多次测量得到的振动液柱振动信号。(a) 300 ns调制脉宽;(b) 450 ns调制脉宽

Fig. 3. Vibration signals of vibrating liquid column obtained by multiple measurements and characteristic values of interference intervals for different modulation pulse widths under the same vibration source. (a) 300 ns modulation pulse width; (b) 450 ns modulation pulse width

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图 4. 经正弦曲线拟合后的测量信号。(a)拟合度;(b)频率;(c)幅度;(d)平均拟合度、频率均方根误差和幅度标准差

Fig. 4. Measured signals fitted by sine curve. (a) Fitting degree; (b) frequency; (c) amplitude; (d) average fitting degree, RMSE of frequency, and mean square error of amplitude

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图 5. 不同调制脉宽下的光强。(a) 300 ns;(b) 450 ns

Fig. 5. Light intensity under different modulation pulse widths. (a) 300 ns; (b) 450 ns

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表 1对探测的相位信号进行正弦曲线的拟合数据

Table1. Sine curve fitting data of detected phase signals

Test times(300 ns,maximum) R-square Amplitude /rad Frequency /Hz Test times(300 ns,mean) R-square Amplitude /rad Frequency /Hz 1 0.83808 0.89718 473.49 1 0.84189 0.89543 501.94 2 0.74502 5.07631 481.38 2 0.85042 3.75555 462.64 3 0.70192 1.07501 465.12 3 0.73416 0.80380 511.02 4 0.75676 0.41166 527.15 4 0.86082 0.50245 535.79 5 0.86125 0.63180 471.83 5 0.88827 0.76465 472.57 6 0.85579 1.45807 464.37 6 0.78366 0.98631 491.92 7 0.87135 0.65611 538.71 7 0.86537 0.80427 536.52 8 0.86534 0.48561 541.95 8 0.90169 0.60826 540.56 9 0.54917 0.56251 525.05 9 0.85724 0.65250 473.87 Test times(450 ns,maximum) R-square Amplitude /rad Frequency /Hz Test times(450 ns,mean) R-square Amplitude /rad Frequency /Hz 1 0.73496 1.85052 504.45 1 0.78920 0.95347 531.62 2 0.81808 2.19652 543.47 2 0.72139 2.48373 523.31 3 0.49614 10.38246 497.63 3 0.80550 10.54663 459.91 4 0.82090 5.46085 445.18 4 0.89036 2.97201 445.53 5 0.80965 0.96564 498.34 5 0.85219 1.08819 525.97 6 0.60672 1.46598 456.47 6 0.86163 2.10007 466.14 7 0.79993 1.61710 533.54 7 0.86096 0.84263 477.35 8 0.75714 0.50143 516.89 8 0.87285 0.56991 536.64 9 0.68947 2.05263 554.51 9 0.81928 0.92717 499.23

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丁朋, 黄俊斌, 汪云云, 刘文, 顾宏灿, 唐劲松. 采用小波变换提取弱反射光纤布拉格光栅干涉信号[J]. 激光与光电子学进展, 2020, 57(19): 190603. Peng Ding, Junbin Huang, Yunyun Wang, Wen Liu, Hongcan Gu, Jinsong Tang. Extraction of Interference Signal of Weak Reflection Fiber Bragg Grating by Wavelet Transform[J]. Laser & Optoelectronics Progress, 2020, 57(19): 190603.