Huigang Zuo

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A novel method based on optical fiber sensors to realize the identification of characteristic frequency of Acoustic Emission (AE) signal is proposed. The system is structured by a ring optical fiber Sagnac interferometer which is used to detect the ultrasonic waves. The optical fiber sensor was fixed on the experimental material; press the experimental(More)
Based on all-fiber single-Sagnac interferometer (SI) technology, a dual-Sagnac optical fiber sensor is introduced to locate the acoustic emission(AE) source. It consists of two Sagnac interferometeres each with a delay loop constituting a symmetric superposition. So it is nonreciprocal and the two SIs work independently to measure the position of the AE(More)
In fiber-optic acoustic emission testing system,the initial phase of the coherent light directly impacts the output signal. We analyze the relationship between the initial phase and the output signal. The theoretical calculation results were simulated by computer. The Sagnac interferometer acoustic emission detection system was designed and experimental(More)
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