Vibration detecting optical fiber sensor

A fiber optic sensor, fiber optic technology, used in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., to achieve the effect of avoiding the need for inherent reference points

Active Publication Date: 2014-04-16
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

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  • Vibration detecting optical fiber sensor
  • Vibration detecting optical fiber sensor
  • Vibration detecting optical fiber sensor

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Embodiment Construction

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] figure 1 Be the structure schematic diagram of the present invention, as shown in the figure, this optical fiber sensor comprises conduction optical fiber 1, fiber grating 3, simply supported beam 2 and has the non-metallic protective shell 4 of opening; Fiber grating 3 and simply supported beam 2 are placed In the non-metallic protective shell 4, the fiber grating 3 is pasted on the simply supported beam 2, and the center point of the fiber grating 3 is aligned with the center point of the simply supported beam 2; an opening 9 is opened on a side wall of the non-metallic protective shell 4, One end of the simply supported beam 2 passes through the opening 9 , and the other end is fixed on the other side wall of the non-metal protective shell 4 .

[0019] In this embodiment, the simply supported beam adopts a long rectangular strip ...

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Abstract

The invention discloses a vibration detecting optical fiber sensor and belongs to the field of optical fiber sensing technology. The vibration detecting optical fiber sensor comprises a conductive fiber, a fiber bragg grating, a simple support and a non-metal protective case with an opening. The fiber bragg grating and the simple support are arranged inside the non-metal protective case; the fiber bragg grating is adhered to the simple support, and the central point of the fiber bragg grating is aligned to that of the simple support; one side wall of the non-metal protective case is provided with the opening, one end of the simple support extends out of the opening, and the other end of the simple support is fixed on the other side wall of the non-metal protective case. The vibration detecting optical fiber sensor is free from influence of factors such as light source fluctuation, fiber bending and losses, connection losses and detector ageing, avoids that common interferometric sensors are fuzzy in phase measurement and require fixed reference points, and can conveniently performing distributed measurement by connecting a plurality of bragg gratings with a single fiber through the wavelength division multiplexing technology to form a distributed sensing network.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to an optical fiber sensor for detecting vibration. Background technique [0002] In the early days of measuring vibration displacement, levers or gears / racks were used to amplify. For example, the original mechanical record was the vibration meter and the dial gauge type vibration meter that can still be seen sometimes in the field. This type of instrument has been eliminated due to its disadvantages such as wear, inconvenient reading, poor accuracy, and inability to transmit vibration signals. The electrical vibration meter has the characteristics of centralized control and processing of vibration signals and the ability to transmit vibration signals over long distances, so it has been used to a certain extent at present, but it is mainly composed of two parts: a vibration sensor and an instrument body. The vibration sensor converts the mechanical vibrat...

Claims

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Application Information

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IPC IPC(8): G01H9/00
Inventor 郭晓金黄俊
Owner CHONGQING UNIV OF POSTS & TELECOMM
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