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CN-122016736-A - LED fluorescent material quality management system based on emission spectrum data

CN122016736ACN 122016736 ACN122016736 ACN 122016736ACN-122016736-A

Abstract

The invention relates to the technical field of quality management, and discloses an LED fluorescent material quality management system based on emission spectrum data, which comprises the following components: the method comprises the steps of acquiring an emission spectrum at a high temperature through the track analysis unit, generating a spectrum response track through parameters such as a spectrum intrinsic purity factor, a thermal evolution correlation matrix and the like, reducing spectrum drift and a thermal quenching process, analyzing the spectrum response track by the spectrum analysis unit to obtain a dynamic spectrum response vector representing dynamic thermal stability, and simultaneously, reflecting a high-temperature performance maintenance index generated by the high-temperature maintenance unit, wherein the performance maintenance capability of an LED fluorescent material at a high temperature can be reflected, and a quality management identifier generated by the quality management unit can effectively judge an instruction of the LED fluorescent material, effectively avoid misjudgment of quality and improve accuracy of quality management.

Inventors

  • Ding Jianyan
  • WU QUANSHENG

Assignees

  • 龙岩学院

Dates

Publication Date
20260512
Application Date
20260228

Claims (10)

  1. 1. An LED phosphor quality management system based on emission spectrum data, comprising: The track analysis unit is used for acquiring the emission spectrums of the target management objects at different temperatures and analyzing the two emission spectrums to obtain a spectrum response track, wherein the target management objects are LED fluorescent materials; the spectrum analysis unit is used for calculating the spectrum gravity center thermal mobility and the characteristic peak shape retention rate of the target management object according to the spectrum response track to obtain a dynamic spectrum response vector; The high-temperature maintenance unit is used for analyzing the dynamic spectrum response vector to obtain a high-temperature performance maintenance index of the performance maintenance capability of the target management object at high temperature; And the quality management unit is used for determining a quality management identifier according to the high-temperature performance maintenance index.
  2. 2. The LED fluorescent material quality management system of claim 1, wherein the different temperatures comprise: the different temperatures are normal temperature and high temperature, the normal temperature is 25 ℃, and the high temperature is more than or equal to 80 ℃.
  3. 3. The LED fluorescent material quality management system of claim 1, wherein analyzing the two emission spectra to obtain a spectral response trace comprises: Interference stripping is carried out on the pretreated emission spectrum, and a spectrum intrinsic purity factor is generated; analyzing the preprocessed emission spectrum to obtain an intrinsic emission component and a weight coefficient thereof; and analyzing the change relation of the weight coefficients of the two intrinsic emission components along with the temperature to form a thermal evolution correlation matrix, wherein the thermal evolution correlation matrix is used for representing the cooperative or competitive relation of different luminous centers under thermal disturbance.
  4. 4. The LED fluorescent material quality management system of claim 3, wherein the analysis of the two emission spectra to obtain a spectral response trace further comprises: Analyzing the maximum variance direction of the shape change of the dominant spectrum in the thermal evolution correlation matrix to obtain a principal transformation axis vector, and calculating the projection value of each temperature point spectrum in the principal transformation axis vector to form a projection evolution sequence; Interpolation is carried out on the spectrum coordinates of each temperature point based on the projection evolution sequence, a high-density intermediate track node is generated, the spatial arrangement of the nodes in the intermediate track node is optimized by combining the spectrum intrinsic purity factors, and the track smooth convergence of the whole interpolation path is calculated; And performing curve fitting and connection on nodes in the high-density track nodes according to the smooth convergence degree of the track to generate a spectrum response track which continuously changes from normal temperature to high temperature.
  5. 5. The system of claim 4, wherein calculating the spectral centroid thermal mobility and the characteristic peak shape retention of the target management object according to the spectral response trace to obtain the dynamic spectral response vector comprises: analyzing the optical response track, and calculating the condition that the curvature of the optical response track changes along with the temperature to obtain a track thermal disturbance entropy value; In a two-dimensional space, projecting a spectrum response track to obtain a two-dimensional path of spectrum migration along with temperature, calculating the angle change rate of the two-dimensional path in the tangential direction of each temperature point, and generating a gravity center migration trend vector representing migration direction and speed.
  6. 6. The LED fluorescent material quality management system of claim 5, wherein the calculation of the spectral centroid thermal mobility and the characteristic peak shape retention of the target management object according to the spectral response trace to obtain the dynamic spectral response vector, further comprises: Analyzing the emission spectrum shape of the spectrum response track at each temperature to obtain a spectrum morphology fidelity factor; And for a key wave band in the emission spectrum, analyzing the fluctuation amplitude of the spectrum response track on the key wave band along with the temperature to obtain the track rigidity of the characteristic wave band.
  7. 7. The LED fluorescent material quality management system of claim 6, wherein the calculation of the spectral centroid thermal mobility and the characteristic peak shape retention of the target management object according to the spectral response trace to obtain the dynamic spectral response vector, further comprises: calculating a track thermal disturbance entropy value and a gravity center migration trend vector to obtain spectrum gravity center thermal mobility, and analyzing a spectrum morphology fidelity factor and characteristic wave band track rigidity to obtain characteristic peak shape retention rate; And constructing a two-dimensional dynamic spectrum response vector by taking the spectrum barycenter thermal mobility and the characteristic peak shape retention as components.
  8. 8. The system of claim 7, wherein the analyzing the dynamic spectral response vector to obtain the high temperature performance maintenance index of the performance maintenance capability of the target management object at high temperature comprises: Analyzing the dynamic spectrum response vector to generate a high-temperature phase track stability index; And evaluating the attenuation tendency of the dynamic spectrum response vector to obtain a vector thermal attenuation coefficient.
  9. 9. The LED fluorescent material quality management system of claim 8, wherein the analysis of the dynamic spectral response vector to obtain a high temperature performance maintenance index for the performance maintenance capability of the target management object at high temperature further comprises: Analyzing the direction offset of the dynamic spectrum response vector to obtain a vector thermal drift tolerance; analyzing the interaction of the spectrum gravity center thermal mobility and the characteristic peak shape retention rate at high temperature to generate a high-temperature component coupling factor; And taking the high-temperature phase trajectory stability index as stability weight, and fusing the vector thermal attenuation coefficient, the vector thermal drift tolerance and the high Wen Fenliang coupling factor to generate the high-temperature performance maintenance index.
  10. 10. The LED fluorescent material quality management system of claim 9, wherein determining the quality management identity based on the high temperature performance maintenance index comprises: analyzing the change of the high-temperature performance maintenance index to obtain the curvature of the performance attenuation tail end; And carrying out collaborative analysis on the high-temperature performance maintenance index, the performance attenuation tail end curvature and the spectrum intrinsic purity factor to obtain a quality management mark.

Description

LED fluorescent material quality management system based on emission spectrum data Technical Field The invention relates to the technical field of quality management, in particular to an LED fluorescent material quality management system based on emission spectrum data. Background At present, when the quality of an LED fluorescent material is evaluated, an emission spectrum curve can be drawn according to standardized emission spectrum data measured under normal temperature conditions, key spectrum parameters such as peak wavelength, half-width, relative light intensity and the like are extracted through the standard spectrum, and the parameters are compared with a preset qualified threshold value, so that whether the quality of the fluorescent material meets the requirement is judged, and the quality of a product is controlled. However, the quality management method still has the following defects that in an industrial high-temperature lighting scene, the optical performance of the fluorescent material, including peak wavelength, luminous intensity and the like, can be obviously changed along with the ambient temperature and working time, and the temperature-dependent spectrum drift and thermal quenching effect are shown, and if the quality judgment standard at normal temperature is still used, the quality judgment result is inconsistent with the quality of the actual LED fluorescent material, and the accuracy of quality management is reduced. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an LED fluorescent material quality management system based on emission spectrum data, which solves the problems. The technical aim of the invention is realized by the following technical scheme: an LED phosphor quality management system based on emission spectrum data, comprising: The track analysis unit is used for acquiring the emission spectrums of the target management objects at different temperatures and analyzing the two emission spectrums to obtain a spectrum response track, wherein the target management objects are LED fluorescent materials; the spectrum analysis unit is used for calculating the spectrum gravity center thermal mobility and the characteristic peak shape retention rate of the target management object according to the spectrum response track to obtain a dynamic spectrum response vector; The high-temperature maintenance unit is used for analyzing the dynamic spectrum response vector to obtain a high-temperature performance maintenance index of the performance maintenance capability of the target management object at high temperature; And the quality management unit is used for determining a quality management identifier according to the high-temperature performance maintenance index. Further, the different temperatures include: the different temperatures are normal temperature and high temperature, the normal temperature is 25 ℃, and the high temperature is more than or equal to 80 ℃. Further, analyzing the two emission spectra to obtain a spectral response trace, including: Interference stripping is carried out on the pretreated emission spectrum, and a spectrum intrinsic purity factor is generated; analyzing the preprocessed emission spectrum to obtain an intrinsic emission component and a weight coefficient thereof; and analyzing the change relation of the weight coefficients of the two intrinsic emission components along with the temperature to form a thermal evolution correlation matrix, wherein the thermal evolution correlation matrix is used for representing the cooperative or competitive relation of different luminous centers under thermal disturbance. Further, analyzing the two emission spectrums to obtain a spectrum response track, and further including: Analyzing the maximum variance direction of the shape change of the dominant spectrum in the thermal evolution correlation matrix to obtain a principal transformation axis vector, and calculating the projection value of each temperature point spectrum in the principal transformation axis vector to form a projection evolution sequence; Interpolation is carried out on the spectrum coordinates of each temperature point based on the projection evolution sequence, a high-density intermediate track node is generated, the spatial arrangement of the nodes in the intermediate track node is optimized by combining the spectrum intrinsic purity factors, and the track smooth convergence of the whole interpolation path is calculated; And performing curve fitting and connection on nodes in the high-density track nodes according to the smooth convergence degree of the track to generate a spectrum response track which continuously changes from normal temperature to high temperature. Further, according to the spectrum response track, calculating the spectrum gravity center thermal mobility and the characteristic peak shape retention rate of the target management object to obtain a dynamic spectrum response vector, in