Mounting glue and application thereof in optical fiber sensor

An optical fiber sensor and glue technology, applied in instruments, measuring devices, optical devices, etc., can solve the problems of strain measurement temperature crosstalk, easy damage of bare optical fibers, affecting the measurement accuracy of optical fiber sensors, etc., so as to improve the strain measurement accuracy and reduce the measurement accuracy. effect of error

Pending Publication Date: 2022-07-29
中国空气动力研究与发展中心超高速空气动力研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, fiber optic sensors are widely used in strain and pressure measurement in harsh environments, but temperature crosstalk is an important factor affecting the measurement accuracy of fiber optic sensors
Although the fiber optic sensor itself has extremely low temperature sensitivity and high strain sensitivity, in actual use, since the bare fiber is easily damaged, which affects the service life of the fiber sensor, it needs to be packaged protectively to give the fiber Sensor more stable performance
[0003] However, although there are a variety of packaging methods in the prior art, during use, when measuring the strain of the object to be measured, it is often necessary to install the optical fiber sensor on the object to be measured, and the substrate of the object to be measured will generate heat output due to temperature changes. The heat output transferred to the fiber optic sensor will cause it to produce a deformation corresponding to the substrate heat output, which will cause a great temperature crosstalk to the strain measurement, and ultimately affect the measurement accuracy of the fiber optic sensor

Method used

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  • Mounting glue and application thereof in optical fiber sensor
  • Mounting glue and application thereof in optical fiber sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Prepare the installation base Invar alloy, and pretreat the installation base;

[0057] The preprocessing operation specifically includes the following steps:

[0058] (1) Use 300-mesh sandpaper to grind the mounting base into cross fine lines at an angle of 45° with the axis; the area of ​​grinding is 4 times the area of ​​the strain-type optical fiber sensor;

[0059] (II) use absorbent cotton to dip in acetone and dehydrated alcohol successively to wipe the mounting base in step (I) until there is no stain on the absorbent cotton;

[0060] (III) The installation base in step (II) is successively subjected to infrared heating drying and scribing positioning treatment to obtain the pretreated installation base;

[0061] (2) The strain-type optical fiber sensor is pre-fixed to the scribed positioning position of the pretreated installation base with adhesive tape;

[0062] (3) 90wt% ZrW 2 O 8 Powder (with a particle size of 1.5 μm), 5 wt % epoxy resin glue and 5...

Embodiment 2

[0064] (1) Prepare the installation base Invar alloy, and pretreat the installation base;

[0065] The preprocessing operation specifically includes the following steps:

[0066] (1) Use 200-mesh sandpaper to grind the mounting base into cross fine lines at an angle of 45° to the axis; the area of ​​grinding is 3 times the area of ​​the strain-type optical fiber sensor;

[0067] (II) use absorbent cotton to dip in acetone and dehydrated alcohol successively to wipe the mounting base in step (I) until there is no stain on the absorbent cotton;

[0068] (III) The installation base in step (II) is successively subjected to infrared heating drying and scribing positioning treatment to obtain the pretreated installation base;

[0069] (2) The strain-type optical fiber sensor is pre-fixed to the scribed positioning position of the pre-processed installation base with glue;

[0070] (3) 80wt% ZrW 2 O 8 The powder (particle size is 2 μm), 10wt% epoxy resin glue and 10wt% absolute ...

Embodiment 3

[0072] (1) Prepare the installation base Invar alloy, and pretreat the installation base;

[0073] The preprocessing operation specifically includes the following steps:

[0074] (1) Use 400-mesh sandpaper to grind the mounting base into cross fine lines at an angle of 45° with the axis; the area of ​​grinding is 5 times the area of ​​the strain-type optical fiber sensor;

[0075] (II) use absorbent cotton to dip in acetone and dehydrated alcohol successively to wipe the mounting base in step (I) until there is no stain on the absorbent cotton;

[0076] (III) The installation base in step (II) is successively subjected to infrared heating drying and scribing positioning treatment to obtain the pretreated installation base;

[0077] (2) The strain-type optical fiber sensor is pre-fixed to the scribed positioning position of the pre-processed installation base with glue;

[0078] (3) 70wt% of ThP 2 O 7 Powder (with a particle size of 1 μm), 20wt% epoxy resin glue and 10wt% a...

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Abstract

The invention provides mounting glue and application thereof in an optical fiber sensor. The mounting glue comprises metal salt powder, epoxy resin glue and absolute ethyl alcohol, the installation glue is applied to the installation of a strain type optical fiber sensor, and the strain type optical fiber sensor is obtained through the following installation steps: (1) preparing an installation substrate, and carrying out the pretreatment of the installation substrate; wherein the mounting base is made of invar alloy; (2) fixing a strain type optical fiber sensor on the pretreated mounting substrate in advance; and (3) coating the surface of the strain type optical fiber sensor with mounting glue, and then heating and curing the strain type optical fiber sensor. When the mounting glue and the mounting substrate provided by the invention are used for mounting the optical fiber sensor, the measurement error of the optical fiber sensor caused by temperature crosstalk can be obviously reduced, and the measurement precision of the optical fiber sensor is greatly improved.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to an installation glue and its application in optical fiber sensors. Background technique [0002] Optical fiber sensors are widely used in aerospace, medical equipment, energy detection, security, industrial automation and many other fields due to their advantages of anti-electromagnetic interference, high temperature resistance, small size and high sensitivity. Among them, optical fiber sensors are widely used in strain and pressure measurement in harsh environments, but temperature crosstalk is an important factor affecting the measurement accuracy of optical fiber sensors. Although the fiber optic sensor itself has extremely low temperature sensitivity and extremely high strain sensitivity, in actual use, the bare fiber is easily damaged, which affects the service life of the fiber optic sensor. More stable performance of the sensor. [0003] However, although t...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01B11/16
CPCG01B11/161G01B11/165G01B11/18
Inventor解真东龙正义闵夫杨彦广李杰毛春满马太江李红
Owner中国空气动力研究与发展中心超高速空气动力研究所