Petrochemical pipeline strain and temperature online monitoring system and method
A pipeline strain and monitoring system technology, applied in the direction of physical/chemical change thermometers, thermometers, measuring force, etc., can solve the problems of small number of sensing units, large monitoring range, loss, etc., to avoid leakage and damage, overcome Fewer sensing units and lower insertion loss
Inactive Publication Date: 2018-05-04
WUHAN UNIV OF TECH
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Problems solved by technology
Due to the long transmission distance of the pipeline, the large monitoring range, the small number of sensing units of the strong reflectivity grating series connection technology, the loss caused by welding, and the low mechanical strength, it is not suitable for long-distance transmission pipelines.
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[0020] The technical solutions of the present invention will be described below in conjunction with the accompanying drawings and embodiments.
[0021] Such as figure 1 As shown, a petrochemical pipeline strain and temperature online monitoring system according to the present invention includes a light source module 1, a detection optical cable 2, a data processing module 5 and a monitoring terminal 6, and the light source module 1 is respectively connected to the The three detection cables 2 have weak grating arrays 21 engraved on the detection cables 2, and the weak grating 21 arrays written on the three detection cables 2 are consistent; the detection cables 2 are provided with an optical circulator 4, and the data processing modules 5 are respectively connected Three optical circulators 4 and a monitoring terminal 6; the light source module 1 outputs an optical signal through a continuous-wavelength high-speed frequency-sweeping laser, passes through an optical splitter 3 ...
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The invention relates to the technical field of weak grating sensing application, in particular to a petrochemical pipeline strain and temperature online monitoring system and method. The system comprises a light source module, detecting optical cables, a data processing module and a monitoring terminal and is characterized in that the light source module is connected with the three detecting optical cables through an optical branching device, and consistent weak grating arrays are etched on the detecting optical cables; an optical circulator is arranged on each detecting optical cable, and the data processing module is connected with the thee optical circulators and the monitoring terminal. The system has the advantages that the system is reasonable in structure, does need fiber splicingand is convenient in arrangement, system insertion loss is lowered, weak grating with ultralow reflectivity is used, the number of sensing units can reach thousands, and large-strain and high-precision sensing data can be provided; comprehensive temperature and strain data can be provided for petrochemical pipelines, sudden change information can be discovered conveniently, and risks such as pipeline leakage and damage can be avoided.
Description
technical field [0001] The invention relates to the technical field of weak grating sensing applications, in particular to an online strain and temperature monitoring system for petrochemical pipelines, and discloses an online strain and temperature monitoring method for petrochemical pipelines. Background technique [0002] In the field of petrochemical industry, a large number of high-temperature and high-pressure pipelines need to be used. Due to long-term operation in harsh environments such as high temperature and high pressure, material aging, high temperature creep damage, and corrosion of liquid or gas make pipeline safety problems more and more prominent, and pipeline leakage often occurs or explosion accidents, the safety monitoring of pipelines is becoming more and more important. The strain state of the local key position of the pipeline is directly related to the safe service state of the structure, and the temperature has a greater impact on large-volume struct...
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IPC IPC(8): G01B11/16G01K11/32G01L1/24G01K11/3206
CPCG01B11/18G01K11/32G01L1/242
Inventor 童杏林熊巧张翠邓承伟方定江陶渊
Owner WUHAN UNIV OF TECH