Fiber-grating-based vibration fault monitoring method of pipeline system

A fiber grating and fault monitoring technology, which is applied in measuring devices, measuring heat, and thermometers with physical/chemical changes, can solve problems such as fault monitoring

Inactive Publication Date: 2016-12-14
DALIAN UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention aims to solve the shortcomings of the existing traditional hydraulic pipeline system fault monitoring, and uses fiber grating sensing technology to provide an effective testing method for hydraulic pipeline vibration fault monitoring. The invention has strong anti-interference ability, good stability, and multiple measuring points , strong adaptability and other advantages

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  • Fiber-grating-based vibration fault monitoring method of pipeline system
  • Fiber-grating-based vibration fault monitoring method of pipeline system
  • Fiber-grating-based vibration fault monitoring method of pipeline system

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Embodiment Construction

[0020] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0021] The fault monitoring system used in the vibration fault monitoring method of the hydraulic pipeline includes an electromagnetic vibration table 1, an installation wall plate 2, a hydraulic pipeline 3, a fiber grating sensor 4, a fiber grating demodulation module 5, a signal acquisition controller 6 and a PC 7 ;

[0022] In the simulation test of hydraulic pipeline system health status monitoring, fault conditions such as pipeline collision, clamp loosening, and temperature mutation are simulated.

[0023] The fiber grating sensor 4 is fixed on the surface of the hydraulic pipeline 3 to be measured by pasting or welding. When the hydraulic pipeline 3 vibrates, the...

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Abstract

The invention, which belongs to the field of vibration monitoring of a hydraulic pipeline system, provides a fiber-grating-based vibration fault monitoring method of a pipeline system. An electromagnetic vibration generator system is used for providing basic excitation applied on a hydraulic pipeline; and the board of the electromagnetic vibration generator system is connected with a mounting wall board for supporting the hydraulic pipeline. The tail end of a fiber grating sensor is connected with a fiber grating demodulator; the fiber grating demodulator is used for analyzing a transmission wavelength; and the two sides of the fiber grating demodulator is connected with the fiber grating sensor and a signal collection control box that are arranged on the hydraulic pipeline. The signal collection control box collects a signal outputted by the fiber grating demodulator module; and ports at the two sidesof the signal collection control box are connected with the fiber grating demodulator module and a PC machine by data collection lines. According to the invention, the fiber grating sensor monitors the vibration state of the hydraulic pipeline in real time; distributed and multi-physical-quantity measurement is realized; the sensitivity of reflection to a fault state is high; and a fault position of a hydraulic pipeline can be reflected effectively.

Description

technical field [0001] The invention relates to the field of vibration monitoring of hydraulic pipeline systems, in particular to a method for monitoring vibration faults of pipeline systems based on optical fiber gratings. Background technique [0002] The vibration of the hydraulic system is ubiquitous in engineering practice. As an important part of the hydraulic system, the pipeline plays a key role in the safe and stable operation of the hydraulic system and even the entire engineering structure. It not only connects the components of the hydraulic system equipment, but also ensures its It works normally and has the function of transferring system energy. Therefore, the vibration of the pipeline affects the reliability and stability of the entire hydraulic system. [0003] At present, in addition to the principle research of fiber grating type sensor, distributed fiber optic sensing system is also an important research focus. The distributed FBG sensing system is to c...

Claims

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Application Information

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IPC IPC(8): G01H9/00G01K11/32G01K11/3206
CPCG01H9/004G01K11/32
Inventor 翟敬宇韩清凯高培鑫宋旭圆魏代同闫洋洋
Owner DALIAN UNIV OF TECH
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