Response Characteristics And Vibration Signal Processing Of Fiber Bragg Grating Vibration Sensors

With the development of science and technology, the problem of vibration signal detection with various engineering structure and mechanical structure have got more and more attention from scientific research personnel and institute. Vibration signal, as the Objects of study, is more perplexing than others, it is just because of this that makes researchers aware that the signal processing should be paid highly attention, although its accuracy and sensitivity can meet the need of researching. Research shows that signal processing is vital to the function of the fiber bragg grating senor.From the point of the sensor, the ancient mechanical sensor can not meet the need of researchers. the fiber bragg grating senor makes a great progress since these years with the feature of anti- interference, small volume and so on. So it is used in various field.From the point of the signal processing, vibration signal finally turn turn into the chang of center wavelength of fiber bragg grating, the amount of data is plenty and belongs to big data processing. We can make use of linear fit method and time-frequency transform to deal with this problem.First we make the mathematical reasoning of the common structure such as uniform strength cantilever beam, then we make Simulation, finally do the job of experimental testing and signal processing.The major content is as follows:Make a brief description of the experimental environment in order to eliminate interference. Use the fiber bragg grating senor with the structure of uniform strength cantilever beam to test the data which includes the change of center wavelength.Make introduction of the experiment environment in order to eliminate the effect, make the test with vibration sensor of uniform strength cantilever beam and write down the date of change in center wavelength of the fiber bragg grating, screening data in order to prepare for signal processing.Make the signal processing with linear fit method and time-frequency transform in order to get the response characteristics of the fiber bragg grating senor, it can get the sensitivity of 16.6pm/g.