摘要
为了提高光纤安防系统的准确预警能力,采用希尔伯特-黄变换法对光纤振动传感器信号产生原理和典型的光纤振动信号进行了分析,获得了传感器不同状态下信号的时频谱,并与通过连续小波变换得到的时频谱进行了对比分析。结果表明,希尔伯特-黄变换在光纤安防系统的时频分析中具有重要价值。
In order to improve the ability of accurate early warning of optical fiber security system,Hilbert-Huang transform(HHT) technology was adopted to analyze the principle of optical fiber vibration sensor's signal.Time-frequency spectrums of different signals were obtained.The comparison of time-frequency spectrums of optical fiber vibration signals by HHT and continuous wavelet transform(CWT) was analyzed.The results show that HHT has an important value in time-frequency analysis of optical fiber security system.
出处
《激光技术》
CAS
CSCD
北大核心
2017年第2期260-264,共5页
Laser Technology
基金
国家自然科学基金资助项目(61377073)
关键词
光通信
光纤安防
希尔伯特-黄变换
连续小波变换
光纤振动信号
optical communication
optical fiber security
Hilbert-Huang transform
continuous wavelet transform
fiber vibration signal
