分布式光纤振动传感信号识别的研究 |
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引用本文: | 邹东伯,刘海,赵亮,康迎杰.分布式光纤振动传感信号识别的研究[J].激光技术,2016,40(1):86-89. |
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作者姓名: | 邹东伯 刘海 赵亮 康迎杰 |
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作者单位: | 1.华中科技大学光学与电子信息学院, 武汉 430074 |
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摘 要: | 为了能够更好地识别入侵振动信号,通过研究分布式光纤振动传感器及振动信号的识别技术,根据振动信号的特点,借鉴语音信号的处理方法,对比原有基于快速傅里叶变换频谱分析算法,引入了基于Mel频率倒谱系数的识别算法。新算法从频域的角度对振动信号进行分析,提取不同环境状态下的Mel频率倒谱系数,并将其作为新的特征参量。通过实验对比分析两种算法,两者的误报率分别为27.5%和7.5%。结果表明,基于Mel频率倒谱系数的算法相比基于快速傅里叶变换的频谱分析算法,在误报率上可以降低20%甚至更多,在不漏报的前提下,显然误报率更低的基于Mel频率倒谱系数的算法更加适用于安防体系。
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关 键 词: | 传感器技术 分布式光纤振动传感器 振动信号 快速傅里叶变换 Mel频率倒谱系数 |
收稿时间: | 2014-10-22 |
Research of signal recognition of distributed optical fiber vibration sensors |
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Abstract: | In order to identify the invasion of vibration signal , a recognition algorithm based on Mel frequency cepstral coefficients ( MFCC) was introduced according to the feature of vibration signal , taking processing method of voice signal as a reference and comparing with original spectrum analysis algorithm based on fast Fourier transform ( FFT) after the investigation of distributed optical fiber vibration sensor and vibration signal recognition technology .. In the new algorithm , the vibration signal was analyzed in frequency domain .MFCC under different conditions was extracted and was taken as a new characteristic parameter.After comparing the experimental results , false alarm rates of both the algorithms are 27.5%and 7.5%respectively. The results show that false alarm rate of the algorithm based on MFCC can be reduced by 20% or more compared with the algorithm based on FFT.Obviously, under the premise of not omitting, MFCC algorithm with lower false alarm rate is more suitable for security systems . |
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Keywords: | sensor technique distributed optical fiber vibration sensor vibration signal fast Fourier transform Mel frequency cepstral coefficient |
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