A single-spectrum monitoring method for multi-point stress distribution

A stress distribution and spectrum technology, applied in the field of fluorescence sensing and experimental mechanics, can solve problems such as stress sensing that cannot be ruled out

Active Publication Date: 2019-01-22
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Finally, the possibility that parameters such as spectral line or band full width at half maximum, and fluorescence polarization state can be used for stress sensing cannot be ruled out.

Method used

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  • A single-spectrum monitoring method for multi-point stress distribution
  • A single-spectrum monitoring method for multi-point stress distribution

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Embodiment Construction

[0017] The technical content part of the present invention describes a method for obtaining multi-point stress distribution information through a single fluorescence spectrum measurement. The specific steps are as follows (take the simultaneous use of two sensitive materials to sense the stress of two positions as an example):

[0018] Step 1: Prepare the stress-sensitive fluorescent material A and the stress-sensitive fluorescent material B, and firmly attach them to the stress positions A and B to be measured respectively. test system such as figure 1 shown. For example, stress-sensitive fluorescent material A and stress-sensitive fluorescent material B are YAG:Ce and Al respectively 2 o 3 : Epoxy resin composite material of Cr phosphor, coated and cured at the stress position to be measured. The stress sensing function of each material has been calibrated in advance, and the relationship between the intensity ratio of the emitted light at the emission wavelength of 570n...

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Abstract

The invention relates to the fields of fluorescence sensing and experimental mechanics, in particular to a method for obtaining multi-point stress data through single fluorescence spectrum measurement. The core part of the present invention is a plurality of fluorescent stress detection points with different intrinsic luminescent characteristics. The excitation light is irradiated to each detection point, and the fluorescence emitted by each point is recorded on a single spectrum at the same time after being converged or combined. The spectrum carries the stress information of each detection point, and the fluorescence of different detection points is distinguished according to different characteristics After data processing, the stress distribution information at each detection point is obtained. When the stress information of two detection points is taken and then differentially processed, the differential result becomes the control or monitoring signal of force balance.

Description

technical field [0001] The invention relates to the fields of fluorescence sensing and experimental mechanics, in particular to a method for obtaining multi-point stress data through single fluorescence spectrum measurement. Background technique [0002] Fluorescent sensing technology has typical advantages such as immunity to electromagnetic interference, non-contact or remote measurement. Fluorescence stress sensing methods mainly include fluorescence piezospectroscopy and stress luminescence, but currently only fluorescence piezometry has been widely used in experimental mechanics research. [0003] In the fluorescence piezospectroscopy technique, the frequency shift of the spectral line of the emission spectrum of the fluorescent material corresponds to the change of the stress of the material, and this stress value can be the residual stress or the externally applied stress. Ruby (Al 2 o 3 :Cr 3+ ) or other Cr 3+ Compounds are commonly used pressure spectrum sensit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24
CPCG01L1/247
Inventor 张巍巍
Owner NANCHANG HANGKONG UNIVERSITY
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