Fiber Bragg grating sensor multifunctional testing device and method

A grating sensor, multi-functional testing technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of no popular application, inability to apply fiber grating sensors, and inability to quantitatively change the temperature of fiber grating sensors, and achieve simple structure, small size, Easy-to-use effects

Active Publication Date: 2021-04-06
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason why the temperature strain test of the fiber grating sensor is not carried out at the same time is that the temperature test of the fiber grating sensor is usually carried out in a constant temperature water bath or a blast drying box, and it is impossible to apply a quantitative stress to the fiber grating sensor to make it happen. Equivalent strain; or when the FBG sensor is doing strain testing, the temperature of the FBG sensor cannot be quantitatively changed
[0003] As a new type of sensor, the fiber grating sensor has not been widely used in the engineering field, so the device that can simultaneously measure the temperature and strain of the fiber grating sensor has not been reported in papers or sold. Strain (displacement, tension) test device

Method used

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  • Fiber Bragg grating sensor multifunctional testing device and method
  • Fiber Bragg grating sensor multifunctional testing device and method
  • Fiber Bragg grating sensor multifunctional testing device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] exist figure 1 Among them, the fiber grating sensor multifunctional testing device of the present embodiment consists of a push-pull force gauge 1, a sensor connector 2, a heat preservation cover 3, a sensor holder 4, a temperature measuring instrument 5, a fiber grating demodulation device 6, a constant temperature heater 7, The second rack and pinion translation platform 8, the rotary lifting platform 9, the optical platform 10, the first rack and pinion translation platform 11, and the three-dimensional combination translation platform 12 are connected to form.

[0037]On the left side of the optical table 10, a first rack-and-pinion translation stage 11 is installed, and a second rack-and-pinion translation stage 8 is installed on the right side. The first rack-and-pinion translation stage 11 is used for left-right adjustment, and the second rack-and-pinion translation stage 8 is used for front and rear adjustment, and the three-dimensional combined translation plat...

Embodiment 2

[0049] In this embodiment, the test device of Embodiment 1 is used to carry out the displacement sensing test on the optical fiber grating sensor with the cantilever structure of equal strength beryllium copper as the cantilever material. The specific test method includes the following steps:

[0050] S1. Install the fiber grating sensor to be tested and the sensor connector 2

[0051] a. Fix the fiber grating sensor to be tested on the sensor holder 4, and cover the heat preservation cover 3;

[0052] b. Adjust the vertical displacement screw micrometer sleeve of the three-dimensional combined translation stage 12, so that the sensor connector 2 located at the front end of the push-pull force meter 1 is at the same height as the free end stress point of the cantilever beam of the fiber grating sensor to be tested, and adjust the first gear The rack and pinion translation stage 11 and the second rack and pinion translation stage 8 make the sensor connector 2 roughly aligned wi...

Embodiment 3

[0060] In this embodiment, the test device of Embodiment 1 is used to carry out the stress sensing test on the fiber grating sensor with the cantilever structure of equal strength beryllium copper as the cantilever material. The specific test method includes the following steps:

[0061] S1. Install the fiber grating sensor to be tested and the sensor connector 2

[0062] a. Fix the fiber grating sensor to be tested on the sensor holder 4, and cover the heat preservation cover 3;

[0063] b. Adjust the vertical displacement screw micrometer sleeve of the three-dimensional combined translation stage 12, so that the sensor connector 2 located at the front end of the push-pull force meter 1 is at the same height as the free end stress point of the cantilever beam of the fiber grating sensor to be tested, and adjust the first gear The rack and pinion translation stage 11 and the second rack and pinion translation stage 8 make the sensor connector 2 roughly aligned with the force p...

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Abstract

A multi-functional testing device and method for an optical fiber grating sensor. The optical platform is provided with a strain force applying mechanism and a sensor heating mechanism. There is a push-pull force gauge on the push-pull force gauge, and a sensor connector is set on the push-pull force gauge; the sensor heating mechanism is a rotary lifting platform on the second rack and pinion translation platform, a constant temperature heater is provided on the rotary lifting platform, and a heating plate is provided on the heating plate. The heat preservation cover is located in the heat preservation cover, and the sensor holder is installed on the heating plate; the side of the optical platform is equipped with a thermometer and a fiber Bragg grating demodulation device. Single-parameter sensing performance test of temperature, displacement, tension and strain, and dual-parameter sensing performance test of temperature and displacement or tension or strain at the same time, with simple structure, small size, convenient operation, low energy consumption and multi-functional testing capabilities advantage.

Description

technical field [0001] The invention belongs to the technical field of optical fiber grating sensors, and in particular relates to a multifunctional testing device and method for optical fiber grating sensors. Background technique [0002] Fiber Bragg grating sensors have attracted much attention in the field of optical fiber sensing due to their advantages of anti-electromagnetic interference, small size, light weight, corrosion resistance, and easy realization of wavelength division, time division and space division multiplexing. In recent years, there have been many reports on the application of fiber grating sensors in civil engineering, public transportation, military, aerospace, medical and other fields. Fiber Bragg grating sensor uses the change of fiber grating with external physical quantities, such as temperature and strain changes, which will cause the central wavelength shift of fiber grating reflection spectrum or transmission spectrum. The measurement of physic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D18/00G01D21/02
CPCG01D18/00G01D21/02
Inventor 冯德全乔学光罗小东白燕
Owner NORTHWEST UNIV
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