A Cross-reference Fiber Laser Static Strain Sensing and Demodulation System
A fiber laser and static strain technology, applied in the direction of optical devices, measuring devices, instruments, etc., can solve the problems of demodulation accuracy limitation, demodulation result influence, temperature sensitivity inconsistency, etc., and achieve the effect of improving demodulation accuracy
Active Publication Date: 2017-06-16
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] In view of this, the main purpose of the present invention is to provide a cross-reference fiber laser static strain sensing and demodulation system to improve the accuracy of fiber grating static strain demodulation and solve the problem of passive fiber grating high-precision static strain demodulation technology. The limitation of the scanning nonlinearity of the tuning laser on the demodulation accuracy, and solve the problem of the influence of the temperature sensitivity inconsistency between the reference grating and the sensing grating on the demodulation results
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0028] Such as figure 1As shown, the cross-reference fiber laser static strain sensing demodulation system includes: 980nm pump source light source 1, 980nm coupler 2, first wavelength division multiplexer 31, second wavelength division multiplexer 32, first Polarization controller 41, second polarization controller 42, fiber laser for sensing 13, fiber laser for reference 14, first 1550nm isolator 51, second 1550nm isolator 52, first beam combiner 61, second beam combiner 62, the third beam combiner 63, the signal generator 11, the narrow linewidth tunable laser 12, the third 1550nm isolator 53, the third polarization controller 43, the 1550nm coupler 15, the first detector 71, the second Detector 72, the third detector...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a cross-reference optical fiber laser static strain sensing demodulation system, the system includes a 980nm pump source light source, a 980nm coupler, a first wavelength division multiplexer, a second wavelength division multiplexer, a first Polarization controller, second polarization controller, fiber laser for sensing, fiber laser for reference, first 1550nm isolator, second 1550nm isolator, first beam combiner, second beam combiner, third beam combiner , signal generator, narrow linewidth tunable laser, third 1550nm isolator, third polarization controller, 1550nm coupler, first detector, second detector, third detector, acquisition card, demodulation algorithm unit and control processor. The present invention solves the limitation problem of tunable laser scanning nonlinearity on the demodulation accuracy in the existing passive fiber grating high-precision static strain demodulation technology, and the influence of temperature sensitivity inconsistency between the reference grating and the sensing grating on the demodulation result problem, achieving high-precision static strain measurement.
Description
technical field [0001] The invention relates to the field of optical fiber sensing, in particular to a cross-reference optical fiber laser static strain sensing demodulation system. Background technique [0002] At present, the application of fiber optic sensors, especially fiber grating sensors, in the observation of crustal deformation has become a research hotspot in this field. Fiber Bragg Grating (FBG) sensor, as a mainstream sensing element in the fiber optic sensor family, has been widely used in strain measurement of smart materials and structures. However, the strain measurement accuracy of the FBG strain interrogator widely used in the market is generally 1με. If it is to be applied to the observation of ground deformation, its strain observation accuracy is far below the requirement. Although, there are currently many technologies that can improve the high-frequency strain measurement accuracy of FBG (such as optical frequency comb technology, laser feedback freq...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16
Inventor 黄稳柱张文涛李丽李芳
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI