A fiber grating multi-dimensional sensor
A fiber grating and sensor technology, applied in the field of sensors, can solve the problems of large amount of data analysis, complex sensor structure, and easy aging of colloid, and achieve the effects of strong anti-interference ability, wide application range, and fewer sensitive components
Active Publication Date: 2018-12-25
HARBIN ENG UNIV
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Problems solved by technology
[0007] Existing fiber grating strain sensors, such as the utility model patent "a kind of fiber grating strain sensor" authorized by the announcement number CN 202158841 U, need to paste the sensor on the object to be measured, which has high requirements on the surface of the object to be measured, and the sensor cannot be reused , the sensitivity of the sensor is greatly affected by the performance of the glue, and the glue is also easy to age, and there are certain limitations in the service life and range of use
Authorized notification number CN 203587254 U's utility model patent "a three-dimensional fiber grating sensor" can only be used to measure ground stress, the application range is very narrow, the sensor structure is relatively complicated, and it is difficult to manufacture. At the same time, the sensor uses 9 optical fibers Raster, large amount of data analysis, low visibility
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[0042] The fiber grating multi-dimensional strain sensor includes a main body structure and a composite material packaged fiber grating sensor.
[0043] like figure 2 As shown, the sensor includes angle steel 3, a first L-shaped bracket, a second L-shaped bracket, a third L-shaped bracket, a composite material packaged fiber grating sensor 5, a composite material packaged fiber grating sensor 6, a composite material packaged fiber grating sensor 7 .
[0044]The angle steel adopts Q235∠40×40×3. Length 2000mm.
[0045] The distance between the first L-shaped bracket and the uppermost surface of the angle steel is 10mm. The second L-shaped bracket is 26mm away from the rightmost surface of the angle steel. The third L-shaped bracket is 26mm away from the rightmost surface of the angle steel.
[0046] like figure 2 , image 3 , Figure 4 Indicated in , the angle steel has a three-dimensional coordinate system formed by the first axis perpendicular to each other, the seco...
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The invention belongs to the technical field of sensors, and particularly relates to a fiber grating multidirectional sensor. The fiber grating multidirectional sensor comprises composite material packaging fiber grating sensors 1. Each composite material packaging fiber grating sensor is fixed on angle iron 3 through an L-shaped bracket 2. Compared with an existing multidirectional strain sensor based on a resistance strain gauge set bridge measuring principle, the fiber grating multidirectional sensor provided by the invention has advantages of high reliability, high interference resistance, etc.
Description
technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a fiber grating multi-dimensional sensor. Background technique [0002] With the development of the city, various large open-air structures are increasing day by day. The health diagnosis and safety monitoring of major engineering structures such as bridges, high-rise buildings, long-span spatial structures, dams, nuclear power plants, power transmission, oil transportation and other network systems have always been an important research topic that has been widely concerned in the engineering field at home and abroad. Most of its conventional technologies are based on point-type electrical measurement and telex, but these technologies have fundamental defects, such as the impact on the physical properties of the measuring point; poor durability; susceptible to strong electromagnetic field interference; unable to distribute measurement, resulting in limited information...
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IPC IPC(8): G01B11/16
CPCG01B11/165
Inventor 张建中孟怡晨谭涛田野柴全刘艳磊谢凯吕中宾
Owner HARBIN ENG UNIV