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Rigid material Young modulus measurement device based on fiber grating sensor

A fiber grating and rigid material technology, applied in the field of Young's modulus measurement, can solve the problems of low measurement accuracy and poor stability, and achieve the effects of high measurement accuracy, good stability, and high sensitivity

Pending Publication Date: 2019-09-06
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor stability and low measurement accuracy of the existing Young's modulus measurement method, and proposes a rigid material Young's modulus measurement device based on a fiber grating sensor

Method used

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  • Rigid material Young modulus measurement device based on fiber grating sensor
  • Rigid material Young modulus measurement device based on fiber grating sensor
  • Rigid material Young modulus measurement device based on fiber grating sensor

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specific Embodiment approach 1

[0020] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment mode, a kind of rigid material Young's modulus measuring device based on fiber Bragg grating sensor described in this embodiment mode includes fiber Bragg grating strain sensor 5-1, pressure sensor 4, fiber Bragg grating 5, pressurizing device 6, fiber Bragg grating Wavelength demodulator 8, multimeter 9, metal frame 10, partition 2 and spring 3;

[0021] The metal frame 10 includes a top plate 10-1, a pillar 10-2 and a bottom plate 10-3;

[0022] The bottom plate 10-3 is arranged on a horizontal plane; the pillar 10-2 is vertically arranged, and the bottom end of the pillar 10-2 is fixed on the bottom plate 10-3; the top end of the pillar 10-2 passes through the partition plate 2 and is fixed on the top plate 10-1 The lower surface of the top plate 10-1, the bottom plate 10-3 and the partition plate 2 are parallel to each other, and the partition plate 2 can move up and down alo...

specific Embodiment approach 2

[0044] Specific embodiment 2: This embodiment is to further limit the Young's modulus measuring device of a rigid material based on the fiber grating sensor described in the specific embodiment 1. In this embodiment, the measuring device also includes a fiber grating temperature sensor 5-2;

[0045] The fiber Bragg grating temperature sensor stress-free metal package is pasted on the rigid material 1 to be measured at the fiber Bragg grating 5, and the fiber Bragg grating temperature sensor 5-2 is used for temperature compensation of the fiber Bragg grating strain sensor 5-1.

[0046] In this embodiment, the fiber Bragg grating temperature sensor 5-2 is pasted on the rigid material 1 to be tested at the other gate area of ​​the fiber Bragg grating 5 through a metal stress-free package.

specific Embodiment approach 3

[0047]Specific embodiment three: This embodiment is to further define a kind of rigid material Young's modulus measuring device based on a fiber grating sensor described in specific embodiment one. In this embodiment, the center of the rigid material 1 to be measured is axis, the central axis of the pressure sensor 4 and the central axis of the pressurizing end of the pressurizing device 6 coincide.

[0048] In this embodiment, the overall force balance is ensured through the above arrangement.

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Abstract

The invention discloses a rigid material Young modulus measurement device based on a fiber grating sensor, relates to a Young modulus measurement technology and aims to solve problems of poor stability and low measurement accuracy of an existing Young modulus measurement method. A bottom plate of the rigid material Young modulus measurement device is arranged on a horizontal plane; struts are fixed on the bottom plate; the struts pass through a separator to be fixed on a top plate, so that the top plate, the bottom plate and the separator are in parallel to each other and the separator moves between the top plate and the bottom plate; springs are arranged on the struts between the separator and the top plate; a pressurization device is placed on the bottom plate; a pressure sensor is fixedon the separator, and a to-be-measured rigid material is placed on the pressure sensor; a fiber grating is cured on the lateral surface of the to-be-measured rigid material, the fiber grating is connected with a fiber grating wavelength demodulator, and the fiber grating wavelength demodulator is connected with a computer; and the pressure sensor is connected with a multimeter. The rigid materialYoung modulus measurement device has the beneficial effects of high stability and high measurement accuracy.

Description

technical field [0001] The invention relates to a technique for measuring Young's modulus. Background technique [0002] Young's modulus is an important physical quantity that describes the ability of solid materials to resist deformation; the larger the Young's modulus, the less likely the deformation will occur; Young's modulus is often used as one of the criteria for selecting materials for designing mechanical components. Commonly used reference parameters in the field of engineering design; the measurement of Young's modulus has great research significance for material mechanics. [0003] The principle of measuring Young's modulus is based on Hooke's law, the ratio of stress to strain. Existing measurement methods include: stretching method and beam micro-bending method, etc., and then people proposed Hall position sensor measurement method, CCD imaging system measurement method, inductive displacement measurement method and optical fiber displacement sensor measuremen...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/06G01B11/16
CPCG01N3/08G01N3/068G01B11/16G01N2203/0003G01N2203/0019G01N2203/0075G01N2203/0641G01N2203/0682G01N2203/0676
Inventor 吕国辉姜亚丽姜旭王思阳韩月强王亮湛晖
Owner HEILONGJIANG UNIV
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