光学学报, 2017, 37 (8): 0806005, 网络出版: 2018-09-07
基于下变频和IQ解调的外差型相位敏感光时域反射技术的模式识别 下载: 1229次
Pattern Recognition of Heterodyne Phase-Sensitive Optical Time-Domain Reflection Technique Based on Down Conversion and IQ Demodulation
图 & 表
图 3. (a)原始信号;(b)下变频信号
Fig. 3. (a) Waveform of original signal; (b) waveform of down conversion signal
图 10. 图像增强。(a)原始图像;(b)均值滤波;(c)拉普拉斯锐化;(d)增强后图像
Fig. 10. Image enhancement. (a) Original image; (b) mean filtering; (c) Laplacian sharpening; (d) image after enhancement
图 11. (a)~(c)PZT振动图像,(d)~(f)汽车驶过振动图像和(g)~(i)人为扰动图像的二值化、膨胀和腐蚀图像
Fig. 11. Images of binaryzation, expansion and corrosion of (a)-(c) PZT vibration images, (d)-(f) vibration images when car is passing through and (g)-(i) artificial disturbance images
表 1DSP耗时评估
Table1. Evaluation of DSP time consuming
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沈隆翔, 封皓, 沙洲, 曾周末. 基于下变频和IQ解调的外差型相位敏感光时域反射技术的模式识别[J]. 光学学报, 2017, 37(8): 0806005. Longxiang Shen, Hao Feng, Zhou Sha, Zhoumo Zeng. Pattern Recognition of Heterodyne Phase-Sensitive Optical Time-Domain Reflection Technique Based on Down Conversion and IQ Demodulation[J]. Acta Optica Sinica, 2017, 37(8): 0806005.