Optical fiber sensor for monitoring aging of damping oil of viscous damper

An optical fiber sensor and viscous damper technology, which is applied in the measurement of phase influence characteristics, etc., can solve the problems of complicated installation process and huge viscous damper, and achieve the effects of high sensitivity, simple production and strong anti-interference.

Pending Publication Date: 2022-02-01
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] However, viscous dampers are often very large, and the installation process is complicated and cumbersome. Once installed on the structure, it is almost impossible to periodically disassemble and install the viscous damper to detect the aging degree of the damping oil.

Method used

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  • Optical fiber sensor for monitoring aging of damping oil of viscous damper
  • Optical fiber sensor for monitoring aging of damping oil of viscous damper
  • Optical fiber sensor for monitoring aging of damping oil of viscous damper

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Embodiment Construction

[0044] In order to make the purpose, features and advantages of the present invention more intuitive and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] As shown in the schematic diagram, an optical fiber sensor for monitoring the aging degree of damping oil in a viscous damper, including a single-mode optical fiber 1, a stainless steel casing 2, an oil inlet hole 3, and a reflective end face 4;

[0046] The reflective end face 4 is formed by polishing one e...

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Abstract

The invention belongs to the technical field of sensors, and discloses an optical fiber sensor for monitoring the aging degree of damping oil in a viscous damper. The optical fiber sensor comprises a single-mode optical fiber, a stainless steel shell, an oil inflow small hole and a reflective end face. According to the sensor, based on the principle of multi-beam interference and the property that the light refractive index of the aged damping oil changes, the aging degree of the damping oil in the viscous damper is indirectly monitored by monitoring the change of reflection spectrum signals of a Fabry-Platino cavity under the condition of the light refractive index of the damping oil with different aging degrees. The sensor can realize long-term, lossless and real-time monitoring of the aging degree of the damping oil in the viscous damper, is high in measurement precision, and has the advantages of relatively simple manufacturing, small size, high strength, high sensitivity and the like. The sensor has a wide application prospect and is easy to popularize.

Description

technical field [0001] The invention relates to an optical fiber sensor for monitoring the aging degree of damping oil in viscous dampers, which belongs to the technical field of sensors, and is especially suitable for monitoring the aging degree of damping oil in viscous dampers in large bridges or high-rise buildings. Background technique [0002] As a common natural disaster, earthquake poses a great threat to the safe service of building structures. A damper is an energy-dissipating vibration-reducing device installed in a structure. Because of its good vibration reduction effect and strong adaptability, dampers are gradually used in civil engineering structures to suppress structural vibrations caused by earthquakes and reduce earthquake disasters. [0003] Since the 1980s, viscous dampers have been used in the field of civil engineering, because of their advantages such as "increasing the damping ratio of structures without significantly changing the structural stiffn...

Claims

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Application Information

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IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 唐福建林思雨李宏男
Owner DALIAN UNIV OF TECH
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