Real-time Signal Processing Of Optical Fiber Vibration Sensing System

Optical fiber sensor technology is an emerging technology which is graduallyformed with the emergence of the fiber and the development of optical fibercommunication technology. As the sensing and transmission signal in the optical fibersensing technology is optical signal, thus it has many unique advantages that othersensor does not have.Its main features are high corrosion resistance,anti-electromagnetic interference, high precision and the distance to transfer is far, goodcorrosion resistant, compact size, lightweight, high sensitivity, fast response and goodreliability. It shows a very unique application prospect, and it is suitable for safetymonitoring in the long-term in the large-scale project.In this paper，the data acquisition and signal processing of anti-intrusion opticalfiber fence alarm system which is based on the Michelson interferometer is analyzedand discussed both in theory and experiments. The results of this paper have importanttheoretical significance and practical value in the commercialization of Optical fibersensor.The main research is described as follows:First of all, the optical fiber sensor is simply introduced which include theprinciple and classification.Then the present research status in the field of optical fibersensing in both at home and abroad is introduced and a simple introduction for this topicresearch content and meaning is done.Second, in this article feasibility technical scheme of the optical fiber fence will beanalyzed, a sensor network system based on Michelson fiber interferometer sensormultiplexing technology to detect the invasion is introduced. Through the demodulationand signal processing module, we can judge the alarm mode. Then the workingprinciple, system composition structure and signal demodulation method are analyzedand the function of data acquisition and signal analysis of anti-intrusion optical fiberfence alarm system will be completed and the response characteristics of the system tovarious special interference signals in the external environment will be analyzed.Then the characteristics of the fiber fence system to various kinds of signals in the theory will be analyzed. We can get the consistency and accuracy by compare theexperimental results with theoretical analysis results through the experiments. Then thesystem will run for a long time, the reliability of the algorithm and the existingdeficiencies will be analyzed. At last we can get the reasons. Then, some functions thathave been realized in industrial application by the anti-intrusion optical fiber fencealarm system which based on LabVIEW platform will be briefly introduced which Ihave finished.Finally, the prospect of the optical fiber fence in the future is proposed.