Quality online automatic detection method and system of large-capacity grating array optical fiber sensor
An optical fiber sensor and automatic detection technology, applied in instruments, testing optical performance, etc., can solve the problems of sensor grating quality evaluation, lack of online detection methods, etc., and achieve the effect of improving product qualification rate and production efficiency, and ensuring the qualification rate.
Active Publication Date: 2019-09-20
武汉烽理光电技术有限公司 +1
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[0004] Aiming at the problem that the large-capacity grating array optical fiber sensor lacks an effective, convenient and fast online detection method and cannot evaluate the quality of a large number of sensor gratings in the mass production process, the present invention proposes a real-time online detection method. The core indicators such as reflectivity, wavelength consistency, 3dB line width, and side mode suppression ratio of the sensing grating are effectively and quickly detected, which provides a guarantee for the quality control in the production process and greatly improves the product qualification rate and production efficiency On-line automatic detection method and system of
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[0036] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0037] The invention can effectively and quickly detect the core indicators such as reflectivity, wavelength consistency, 3dB line width, side mode suppression ratio of the sensing grating in real time and online, provide guarantee for quality control in the production process, and greatly improve the product Qualification rate and production efficiency.
[0038] The quality online automatic detection system of the large-capacity grating array optical fiber sensor of the embodiment of the present invention is such as figure 2 Shown. The system mainly includes grating array demodulator 2, qual...
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The invention discloses a quality online automatic detection method and system of a large-capacity grating array optical fiber sensor. The method comprises the following steps of reading spatial information of each grating of a grating array sensing optical fiber in an online production process; linearly converting the read spatial information into time domain information and drawing reflection spectra of all the gratings; according to a reflectance spectrum, calculating indexes of all grating spectra, including reflectivity, wavelength consistency, a 3dB line width, and a side mode suppression ratio; determining according to the calculated indexes, when any setting index can not be satisfied, emitting a control signal and notifying grating array optical fiber production equipment to carry out parameter adjustment; and if multiple continuous spectra are unable to satisfy the set index, emitting an alarm signal and forcibly turning off the grating array optical fiber production equipment . In the invention, production quality of a large-capacity grating array sensing fiber can be monitored and analyzed in an online mode, and index assessment is performed on each produced grating sensor.
Description
Technical field [0001] The invention relates to the field of optical fiber grating sensing, in particular to an online automatic detection method for the quality of a large-capacity grating array optical fiber sensor. Background technique [0002] Large-capacity grating array technology is a new type of optical fiber sensing technology that has emerged in recent years. It adopts wavelength division multiplexing (WDM) and optical time domain reflection (OTDR) technology, which overcomes the short detection range and spatial resolution of traditional fiber grating demodulation methods. With low-level defects, its single channel can integrate tens of thousands of sensing gratings, with a spatial resolution of up to 10cm. It is a newest type of optical fiber sensing technology that integrates the advantages of distributed optical fiber and fiber grating sensing technology. [0003] With the in-depth development and industrialization of this technology, the reflectance, center wavelengt...
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Login to View More IPC IPC(8): G01D18/00G01M11/02
CPCG01D18/00G01M11/02
Inventor 李凯徐一旻宋珂王月明马俊杰汪文静
Owner 武汉烽理光电技术有限公司