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Integrated Strain Measurement Device Based on Fiber Bragg Grating Strain Sensor

A technology of strain sensor and fiber grating is applied in the field of strain measurement device to achieve the effect of good waterproof sealing performance, improving waterproof sealing performance and ensuring accuracy

Active Publication Date: 2015-12-02
中国船舶重工集团公司第七〇二研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In view of the above situation, there are fiber grating sensors capable of temperature compensation in the prior art, but how to solve the temperature compensation and waterproof sealing problems during the sensor installation process is still a technical problem that needs to be solved in its actual use

Method used

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  • Integrated Strain Measurement Device Based on Fiber Bragg Grating Strain Sensor
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  • Integrated Strain Measurement Device Based on Fiber Bragg Grating Strain Sensor

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Embodiment Construction

[0019] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0020] See Figure 4 , the present invention includes a fiber grating strain sensor 2 freely placed on the metal structure to be tested 1, a first magnetic force ring 3 is fixed on the upper surface of the metal structure to be tested 1 by magnetic force, and surrounds the fiber grating strain sensor 2, and a fixed ring 4 With inner positioning ring 41 and outer positioning ring 42, outer positioning ring 42 is fixed on the first magnetic force ring 3, see Figure 5 , the fiber grating temperature compensation sensor 5 is freely supported on the support plate 9, the fiber grating temperature compensation sensor 5 is placed on the support plate 9, and the optical fiber two 51 connected at the two ends of the fiber grating temperature compensation sensor 5 passes through the optical fiber outlet at the two ends of the support plate 9 Out, t...

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Abstract

The invention discloses an integrated strain measurement device based on an optical fiber grating strain sensor. The integrated strain measurement device comprises an optical fiber grating strain sensor freely arranged on a metal structure to be measured, wherein a first magnetic ring is fixedly arranged on the metal structure to be measured through magnetic force and encircles the optical fiber grating strain sensor; a fixing ring is provided with an inner positioning ring and an outer positioning ring; the outer positioning ring is fixedly arranged on the first magnetic ring; an optical fiber grating temperature compensation sensor is supported on a supporting plate; the supporting plate is fixedly arranged on the inner positioning ring; therefore, the optical fiber grating strain sensor and the optical fiber grating temperature compensation sensor are positioned in a closed space; a sealing cover is fixedly arranged on the outer positioning ring; a clip-shaped turnup edge at the bottom of the sealing cover is tightly attached to the metal structure to be measured; a second magnetic ring covers the clip-shaped turnup edge of the sealing cover; and a waterproof sealing plate is fixedly connected to the outer positioning ring. The integrated strain measurement device based on the optical fiber grating strain sensor has a temperature compensation function and waterproof sealing property, has improvef the measurement precision, is convenient to mount and dismount and can be reused.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a strain measuring device based on an optical fiber grating strain sensor, which is applied in real-time structural health monitoring of engineering structures and has temperature compensation function and waterproof sealing performance. Background technique [0002] For large-scale engineering structures such as ships, offshore platforms, railways, and bridge stay cables, real-time structural health monitoring is required in order to identify the cumulative damage of the structure in a timely manner, so as to give early warning of possible disasters. Strain is an important physical characteristic of engineering structures, which can reflect the corresponding characteristics of the structure and judge the damage state of the structure. It is the most important parameter for health monitoring of engineering structures. Among the common strain measurement components, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16
Inventor 韦朋余岳亚霖陈哲曾庆波祁江涛陈颖张涛
Owner 中国船舶重工集团公司第七〇二研究所
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