Demodulation system for carrying out wavelength side-band processing on fiber gratings
A fiber grating and demodulation system technology, which is applied in the field of demodulation systems, can solve the problems of excessive data calculation, achieve effective screening, solve the effect of large data processing volume and simple processing process
Active Publication Date: 2013-09-04
上海紫珊光电技术有限公司 +1
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Problems solved by technology
The demodulation system for fiber grating wavelength side peak processing of the present invention needs to solve the problem of fiber grating side peak processing, and at the same time solve the problem of excessive data calculation
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[0042] For 2-channel processing, see Figure 7 , where 9 is a splitter, which divides the light from the scanning light source 1 into two paths, and sends one path to the circulator 2 1 channel, which also includes a fiber grating 3 1 , photoelectric conversion and signal amplification processing module 4 1 , differential zero-crossing detection module 5 1 , compare module 6 1 , data processing module 8 and adjustable reference module 7 1 ;The other way is sent to circulator 2 2 channel, which also includes a fiber grating 3 2 , photoelectric conversion and signal amplification processing module 4 2 , differential zero-crossing detection module 5 2 , compare module 6 2 , data processing module 8 and adjustable reference module 7 2 ,remove figure 1 Except for the scanning light source 1 and the data processing module 8 which are common parts, those with the same function and different channels are distinguished by subscripts, and those with the same subscript indicate...
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The invention relates to a demodulation system for carrying out wavelength side-band processing on fiber gratings, which comprises a scanning light source, a circulator, a photoelectric conversion and signal amplification processing module, a differential zero crossing checking module, a comparison module, a data processing module and an adjustable benchmark module, wherein the scanning light source is connected with the circulator; the circulator is connected with a fiber grating; the photoelectric conversion and signal amplification processing module is connected to the circulator so as to receive optical signals reflected from the fiber grating, and respectively connected to the differential zero crossing checking module and the comparison module; the differential zero crossing checking module and the comparison module are respectively connected to the data processing module; the data processing module is connected to the adjustable benchmark module; and the adjustable benchmark module is connected to the comparison module so as to provide comparative benchmark values for the comparison module. The demodulation system provided by the invention solves the problem of side-band processing on fiber gratings and the problem of exaggerated computation amount.
Description
technical field [0001] The invention relates to the field of optical fiber sensing, in particular to a demodulation system for performing wavelength edge peak processing on optical fiber grating signals based on a scanning light source in optical fiber detection. Background technique [0002] The fiber grating sensor is affected by external temperature or force, which will cause the change of the effective refractive index of the grating area or the change of the grating period, thereby changing the reflection wavelength of the fiber grating. The fiber grating sensing system can realize the measurement of various physical quantities by detecting the reflected wavelength. Fiber Bragg grating demodulation technology is a very key technology in the fiber Bragg grating sensing system, which measures the reflection wavelength characteristics of the fiber Bragg grating and demodulates its characteristic parameters into the value of the measured physical quantity. [0003] At pres...
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IPC IPC(8): G02F2/00G01J9/00G01M11/02
Inventor 童子磊赵霁虹赵浩刘捷
Owner 上海紫珊光电技术有限公司