Broadband fluorescence spectrum strain sensing method

Broadband fluorescence spectrum strain sensing method

  • CN 105,181,016 A
  • Filed: 09/10/2015
  • Published: 12/23/2015
  • Est. Priority Date: 09/10/2015
  • Status: Active Application
First Claim
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1. the method with the strain of broadband fluorescence spectrum sensing, it comprises prepares compound substance based on suitable broadband fluorescence material, selected shooting conditions measures the fluorescence spectrum of fluorescence composite material at a constant temperature, ask for the barycentric wave numbers of spectral bands, the barycentric wave numbers of matching gained is the data rule of movement with compound substance strain variation, obtains strain sensing equation;

  • It is characterized in that method step is as follows;

    Step one, broad-band illumination fluorescent powder is mixed in the precursor of coating material, is coated in standard model surface, after solidification, forms coating composite material;

    Step 2, the characteristics of luminescence according to fluoresent coating compound substance, select suitable excitation wavelength, beam splitter, detecting element, build Spectrum testing systems;

    Step 3, under known steady temperature, by the stressed of control criterion sample gradually and distortion, change the strain of fluoresent coating, measure and the line fluorescent spectrum of record fluorescence composite material;

    The bands of a spectrum barycentric wave numbers of step 4, calculating line fluorescent spectrum, matching obtains strain ~ barycentric wave numbers sensing curve and the sensing equation of demarcating described compound substance;

    Step 5, at the temperature identical with calibration process, when there is unknown strain in described fluoresent coating compound substance, with the excitation fluoresent coating that step one is used, measure its fluorescence spectrum and calculate the barycentric wave numbers value of bands of a spectrum, substitute into the sensing equation obtained by step 4, namely obtain strain value to be measured;

    Material behavior relation between the physical strength of step 6, according to standard sample, stress, strain three, can obtain stress value to be measured further.

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