Ocean engineering cofferdam stress real-time monitoring device and method
A real-time monitoring and marine engineering technology, applied in the field of marine engineering, can solve the problems of surface structure damage, complex installation and disassembly, and changing environment of the structure to be tested, and achieve the effects of strong electromagnetic interference resistance, convenient operation and small size.
Inactive Publication Date: 2020-12-15
WEIFANG UNIV OF SCI & TECH +1
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Problems solved by technology
It solves the problem that the existing marine engineering cofferdam structure stress monitoring device is difficult to apply to the high corrosion and variable environment marine environment, and solves the problem that the existing fiber grating sensor is bonded to the surface of the structure to be tested or the surface is grooved. Structural surface structure damage and complex problems of installation and disassembly
Method used
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Embodiment Construction
[0027] Below by embodiment and in conjunction with accompanying drawing, the present invention is described in further detail:
[0028]The main structure of the marine engineering cofferdam stress real-time monitoring device involved in this embodiment includes a bare fiber grating sensor 1, an optical fiber connection line 2, an armored optical cable 3, a facing fiber grating string 4, a magnetic optical fiber fixing member 5, and a cofferdam structure steel sheet pile 6. A laser 8, a grating test analyzer 7 and a computer 5, several bare fiber grating sensors 1 are connected to the fiber grating string 4 by the optical fiber connection line 2 according to the pre-designed spacing, and the optical fiber connection line at the end of the fiber grating string 4 2 is connected with the armored optical cable 3, the bottom surface of the magnetic optical fiber fixing part 5 is smooth and a groove is opened in the middle, and the optical fiber connecting line 2 facing the fiber grat...
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The invention discloses an ocean engineering cofferdam stress real-time monitoring device. The main structure of the device comprises bare fiber grating sensors, an optical fiber connecting line, an armored optical cable, a near-surface fiber grating string, a magnetic optical fiber fixing part, a cofferdam structure steel sheet pile, a laser, a grating test analyzer, and a computer. The bare fiber grating sensors are connected into a near-surface fiber grating string through optical fiber connecting wires according to preset intervals, the optical fiber connecting wires at the tail end of thenear-surface fiber grating string are connected with the armored optical cable, and the bottom surface of the magnetic optical fiber fixing part is smooth and provided with a groove in the middle. Optical fiber connecting lines between adjacent surface optical fiber grating strings are clamped into grooves in the magnetic optical fiber fixing part, the bottom face of the magnetic optical fiber fixing part is magnetically attracted to the surface of the cofferdam structure steel sheet pile, the armored optical cable is connected with the grating test analyzer, the input end of the grating testanalyzer is connected with the laser, and the output end of the grating test analyzer is connected with the computer. The stress data monitored by the optical fiber sensors are in one-to-one correspondence with the positions generated by the optical fiber sensor,s so that stress mutation points can be found more easily.
Description
Technical field: [0001] The invention belongs to the technical field of marine engineering, and relates to a stress testing process for a cofferdam stretched steel sheet pile enclosure structure of a hydraulic structure in a marine engineering, in particular to a method for testing a stretched steel sheet pile for a marine engineering cofferdam based on optical fiber grating sensing technology. A method for real-time monitoring of stress. Background technique: [0002] With the development of industry and the depletion of land resources, human beings began to turn their attention to the ocean for survival and development, trying to alleviate the pressure on resources through comprehensive development and rational use of ocean resources. Coastal countries have changed their concepts and vigorously developed the marine economy. The comprehensive development and utilization of marine resources and the development of marine economy are the strategic goals of our country in the ...
Claims
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Login to View More IPC IPC(8): G01L1/24
CPCG01L1/246
Inventor 寇海磊张旺春王腾
Owner WEIFANG UNIV OF SCI & TECH