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

Abstract

The invention discloses a hydraulic structure seepage property distributed optical fiber sensing integrated system and a method. The system comprises 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 the special optical fiber for seepage measurement is connected to the seepage property identification device for information collection, processing and analysis after successful test. By adopting the system and the method, a long optical fiber can be calibrated efficiently, and the bending curvature of the long optical fiber can be controlled and measured reliably. By combining the special optical fiber for seepage measurement with a self-controlled heat source and a seepage property identification technology based on femtosecond pulse, the seepage property of a hydraulic structure can be sensed with high precision and high spatial resolution, at high sensing speed and at long distance.

Description

technical field [0001] The invention relates to a distributed optical fiber perception integration system and method for seepage properties of hydraulic structures, and belongs to the field of safety monitoring of water conservancy and hydropower projects. Background technique [0002] For hydraulic structures, seepage is one of the key factors affecting their safe service. Strengthening the efficient perception of seepage behavior is of great significance to timely discover safety hazards and ensure the reliable operation of hydraulic structures. With the development of distributed optical fiber sensing technology, it has become an important research direction in the fields of water conservancy, civil engineering and other engineering safety to obtain structural behavior information and perceive structural health. However, in the actual engineering application of distributed optical fiber sensing of the seepage behavior of hydraulic structures, due to the particularity of t...

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Problems solved by technology

[0005] Third, in practical engineering applications, it often occurs that the laid optical fiber is not properly protected or the bending section is not effectively protected, resulting in reduced monitoring accuracy or serious distortion of the measured value, or even unable to obtain the measured value; improper fiber layout leads to It does not meet the requirements of engineering structure size and construction layout, and causes unnecessary waste

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