Hohai University

Huaizhi Su

Meng Yang

Chongshi Gu

Hong Luo

Hao Li

Xing Li

Wei Xie

Hezhi Liu

Qiangqiang Jia

Zheng Fang

Zhaoqing Fu

Zhiyun Guo

The present invention discloses a dynamic diagnosis system and method for concrete damage based on a distributed sensing optical fiber. The system includes an upper fixed platform and lower fixed platforms, the upper fixed platform is provided with an optical fiber correction entity and an optical fiber framing platform, the optical fiber correction entity is provided with a butterfly-shaped optical fiber pressing block, the optical fiber framing platform is provided with an optical fiber threaded column, a sensing monitoring barrel and a disturbance eliminating barrel are arranged below the upper fixed platform, the downside of the sensing monitoring barrel is connected with a left fiber fixing beam, the left fiber fixing beam is connected with a left barrel bottom cone, the left barrel bottom cone is hinged with a left port light source protection body, the lower end of the disturbance eliminating barrel is connected with a right fiber fixing beam, the right fiber fixing beam is connected with a right barrel bottom cone, and the right barrel bottom cone is hinged with a right port light source protection body. The dynamic diagnosis system and method are not only capable of catching microvibration, but also capable of bearing greater-amplitude vibration, so that the vibration monitoring range is greatly widened, and the demand for dynamic diagnosis of concrete structural damage is met perfectly.

Dynamic diagnosis system and method for concrete damage based on distributed sensing optical fiber

The apparatus comprises a bottom plate, a first side plate (), and a second side plate (). The top of the first side plate is connected to the top of the second side plate by an arc-shaped fiber carrying channel (). A first arc-shaped cover () and a second arc-shaped cover () are hinged to the tops of the first side plate and the second side plate, respectively. A first arc-shaped pressing body () and a second arc-shaped pressing body () are fixedly connected to the lower end surfaces. A first sensing optical fiber () and a second sensing optical fiber () located in the arc-shaped fiber carrying channel are disposed below the first arc-shaped pressing body and the second arc-shaped pressing body respectively. The first arc-shaped cover is connected to the second arc-shaped cover by a locking apparatus.

Apparatus and method for arranging concrete structure service condition optical fiber acoustic emission sensing device

Provided are a water engineering seepage behavior fusing and sensing system and method. The system comprises a seepage-hidden optical fiber locating device, a seepage flow velocity distributed optical fiber monitoring device, an online seepage line diagnosis device and a seepage behavior optical fiber self-adaptive identification device, the location of a water engineering seepage point is realized by using the seepage-hidden optical fiber locating device, then, the seepage flow velocity of a water engineering is monitored by virtue of the seepage flow velocity distributed optical fiber monitoring device, the online diagnosis of a seepage line on a section of a whole water engineering structure can be realized by using the online seepage line diagnosis device, and finally, the current seepage behavior is integrally monitored and evaluated by using the seepage behavior optical fiber self-adaptive identification device, so that the water engineering seepage behavior fusing and sensing is completed. The optical information change of the optical fiber is acquired from multiple aspects and angles by using the four water engineering seepage monitoring devices, depending on the material and mechanical properties of the water engineering and relying on a distributed optical fiber monitoring technology, and furthermore, the monitoring and sensing of a seepage behavior of a water engineering are indirectly completed.

Water engineering seepage behavior fusing and sensing system and method

The present invention discloses an integrated monitoring system and monitoring method for a seepage behavior of water engineering in a complex environment, the system includes a seepage character space-time monitoring device and a sensing fiber seepage-monitoring sensitizing device, the seepage character space-time monitoring device includes a vertical force-bearing fiber-carrying column, an outer edge through pipe and a sensing fiber, a left force-bearing beam and a right force-bearing beam are disposed at two sides of the vertical force-bearing fiber-carrying column respectively, the outer edge through pipe is sleeved over the vertical force-bearing fiber-carrying column, a fiber collecting box is disposed above a second transitional round end, the sensing fiber in the fiber collecting box runs through the outer edge through pipe to be connected to a component supporting body containing a temperature measuring device, and then runs through an elastic device after sequentially bypassing the second transitional round end and a first transitional round end to be led out from a third transitional round end. The integrated monitoring system for a seepage behavior of water engineering in a complex environment, with a series of products and technologies such as research and development in basic sensing fibers and secondary processing of common sensing fibers being provided, implements quantitative and qualitative assessments in the horizontal and longitudinal directions in terms of time and space.

Integrated monitoring system and monitoring method for seepage behavior of water engineering in complex environment

A wading structure health sensing distributed optical fiber calibration system and a method includes a heat insulation barrel, and calibration modules located in the inner ring of the barrel, the calibration module comprises a through-shaft, a first electronic thermometer and a second electronic thermometer, an optical cable to be calibrated is twisted on the through-shaft and is connected to an optical fiber temperature demodulator outside the heat insulation barrel, the first and second electronic thermometers are respectively connected to first and second temperature control meters outside the barrel, a temperature source wire for heating water in the barrel arranged in the wall of the barrel, the temperature source wire connected to a power temperature control meter outside the barrel, and the first temperature control meter connected to cooling and heating devices simultaneously through leads of the first temperature control meter.

Water structure health sensing distributed optical fiber calibration system and method

A sensing optical fiber acoustic emission integrated sensing system and method for monitoring the safety of a structure which comprises a sensing optical fiber temperature interference removal device and a sensing optical fiber acoustic emission demodulation device. A sensing optical fiber () successively passes through the sensing optical fiber temperature interference removal device and the sensing optical fiber acoustic emission demodulation device. A distributed sensing optical fiber acoustic emission regulation and control device for sensing the degradation of structure performance is integrated with a sensing optical fiber acoustic emission sensing system with multiple complex devices, multiple functional modules and multiple interconnection components.

Sensing optical fiber acoustic emission integrated sensing system and method for monitoring safety of structure

A hydraulic structure seepage property distributed optical fiber sensing integrated system includes a special optical fiber for seepage measurement, an optical fiber calibration device, an optical fiber laying device, and a seepage property identification device. After the optical fiber calibration device calibrates the special optical fiber for seepage measurement on site, the special optical fiber for seepage measurement is laid and tested with the aid of the optical fiber laying device, and is connected to the seepage property identification device for information collection, processing and analysis after the test is successful.

Hydraulic structure seepage property distributed optical fiber sensing integrated system and method

A distributed sensing fiber acoustic emission apparatus and method for monitoring a hydraulic engineering safety behavior includes a fiber-carrying laying module and a fiber acoustic emission module. The fiber-carrying laying module includes an inner supporter, mesh modules and fiber-carrying modules, the inner supporter, the mesh modules and the fiber-carrying modules form a cylindrical shape. The cross section of the inner supporter is in a quadrangle inner-concave shape with the four edges concaved, the four surfaces of the inner supporter are concaved, the mesh modules having a plurality of meshes are respectively disposed in the four concave surfaces of the inner supporter, and the fiber-carrying module is arranged between every two adjacent mesh modules.

Distributed sensing fiber acoustic emission apparatus and method for monitoring hydraulic engineering safety behavior

A distributed sensing fiber acoustic emission fusion sensing system includes a sensing fiber temperature-sensitive compensation device and a sensing fiber acoustic emission demodulation device. A sensing fiber in the sensing fiber temperature-sensitive compensation device after being compensated enters the sensing fiber acoustic emission demodulation device.

Distributed sensing fiber acoustic emission fusion sensing system and running method

A fiber acoustic emission sensing apparatus and method including a laying device and an acoustic emission source; the laying device comprises base plate, first side plate and second side plate, the top portion of the first side plate connected with the top portion of the second side plate through an arc-shaped fiber-carrying channel, a main cavity formed by the first side plate and the second side plate; top portions of the first and second side plates respectively hinged with first and second arc-shaped covers, the lower end surface of the first arc-shaped cover fixedly connected with a first arc-shaped pressing body, the lower end surface of the second arc-shaped cover fixedly provided with a second arc-shaped pressing body, a first sensing fiber arranged under the first arc-shaped pressing body, and a second sensing fiber arranged under the second arc-shaped pressing body.

Fiber acoustic emission sensing apparatus and method for service behavior of hydraulic concrete structure

An acoustic emission source expansion apparatus integrated hydraulic engineering construction behavior fiber sensing device includes a base plate, a first side plate and a second side plate fixedly connected with two sides of the base plate, the top portion of the first side plate is connected with the top portion of the second side plate through an arc-shaped fiber-carrying channel, and a main common cavity is formed by the base plate, the first side plate, the second side plate and the arc-shaped fiber-carrying channel; a pair of sensing fibers is arranged in the arc-shaped fiber-carrying channel, the sensing fibers are tightly pressed in the arc-shaped fiber-carrying channel through a pressing block, the pressing block is provided with a plurality of springs, the springs tightly press the pressing block through a cover plate, and the cover plate is arranged on the first side plate and the second side plate.

Acoustic emission source expansion apparatus integrated hydraulic engineering construction behavior fiber sensing device

A distributed optical fiber identification system and method for seepage conditions of a hydraulic structure and a base thereof including a single-mode optical fiber having an automatic control heat source produced for seepage measurement, an optical path coupler and a synchronous controller, the synchronous controller is connected to a mode locked laser, a polarization beam splitter, an isolator, a grating pair, a diffraction grating, a reflector, a beam splitter, a nonlinear crystal, a spectrometer and a Michelson interferometer, the output end of the Michelson interferometer is connected to the optical path coupler, the output end of the optical path coupler is connected to a detector and a second optical splitter respectively, the detector is connected to a digital signal processor, the second optical splitter is connected to the digital signal processor through an amplifying circuit, and the digital signal processor is connected to the synchronous controller and a collector respectively.

Distributed optical fiber identification system and method for seepage conditions of hydraulic structure and base thereof

A temperature interference-free sensing fiber monitoring apparatus and application method therefor including a vacuum cavity module, a composite material flat groove module and a port fiber-fixing module, wherein the vacuum cavity module is connected with the composite material flat groove module via an glue-injection square groove, and the port fiber-fixing module is connected with the vacuum cavity module via a foursquare plug body; a sensing fiber orderly passes through the composite material flat groove module, the vacuum cavity module and the port fiber-fixing module; the vacuum cavity module, the composite material flat groove module and the port fiber-fixing module are all fixed on a temperature interference-free base platform.

Temperature interference-free sensing fiber monitoring apparatus and application method therefor

A single-mode optical fiber having an automatic control heat source specifically produced for hydraulic seepage measurement, sequentially includes a single-core optical fiber, an inner protective elastic layer, a heat insulation steel ring, an inner-layer filling protection ring, an elastic hard ring, and an anti-seepage heat insulation hard sleeve ring arranged from inside to outside. The single-core optical is connected to a plurality of outer circular sheathing protection pipes respectively, the outer circular sheathing protection pipes sequentially pass through the inner protective elastic layer, the heat insulation steel ring, the inner-layer filling protection ring and the elastic hard ring and are connected to the anti-seepage heat insulation hard sleeve ring, each outer circular sheathing protection pipe is filled with a drainage water storage cotton sleeve, the drainage water storage cotton sleeve is connected to a second filter screen, and the second filter screen is connected to a first filter screen externally.

Single-mode optical fiber having automatic control heat source specifically produced for hydraulic seepage measurement

A heat source-free fiber positioning and orienting system for seepage of submerged or partially submerged structures and monitoring method thereof includes a plurality of seepage monitoring devices connected through rotary supports. The seepage monitoring devices include first seepage monitoring units symmetrically distributed on the front and back and second seepage monitoring units symmetrically distributed on left and right. Seepage monitoring fibers are distributed in the first seepage monitoring units and the second seepage monitoring units, and the seepage conditions of the submerged or partially submerged structures are monitored through the seepage monitoring fibers. The heat source-free fiber positioning and orienting system for the seepage of submerged or partially submerged structures has the characteristics of no heating, distribution manner, multiple orientations and synchronicity or the like.

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Jiangsu, China

Huaizhi Su