CN-121994766-A - Artificial board identification method based on adhesive ultra-long room temperature phosphorescent afterglow

CN121994766ACN 121994766 ACN121994766 ACN 121994766ACN-121994766-A

Abstract

The invention relates to the technical field of artificial board identification, in particular to an artificial board identification method based on an adhesive ultra-long room temperature phosphorescent afterglow signal. The method comprises the steps of conducting light excitation on an artificial board adhesive joint structure with room temperature phosphorescence, collecting delayed luminescence signals within a preset time window after excitation is stopped, extracting optical characteristic parameters of the delayed luminescence signals, wherein the optical characteristic parameters comprise at least two of luminescence colors, luminescence intensity, emission spectrum, delayed luminescence images, phosphorescence service life and a luminescence area configuration combination mode, and matching the optical characteristic parameters with a preset information base so as to realize identification of the artificial board. According to the method, the room temperature phosphorescence signal of the interface of the adhesive layer inside the plate is used as the identification basis, the nondestructive identification can be realized without depending on external additional identification, and the phosphorescence identification signal accompanies the whole service period of the artificial plate product. The method has the advantages of quick and convenient identification process, strong anti-interference capability, high information stability and the like.

Inventors

YUAN TONGQI
YANG SHENG
ZHANG XIPENG
WEN JIALONG
ZHU YIKUN
LIU ZHENGYU
ZHOU TONG

Assignees

北京林业大学

Dates

Publication Date: 20260508
Application Date: 20260408

Claims (10)

1. The artificial board identification method based on the adhesive ultra-long room temperature phosphorescent afterglow is characterized by comprising the following steps of 1, conducting ultraviolet excitation on an artificial board adhesive joint structure with phosphorescent afterglow characteristics, 2, collecting at least two of luminous color, luminous intensity, emission spectrum, delayed luminous image, phosphorescent service life and optical characteristic parameter information of a luminous area configuration combination mode of the artificial board adhesive joint structure with phosphorescent afterglow characteristics, 3, matching the collection result with a preset information base, and 4, completing identification according to the matching result.
2. The method for identifying the artificial board based on the phosphorescent afterglow of the adhesive ultra-long room temperature is characterized in that the artificial board with the phosphorescent afterglow characteristic in the step 1 is a laminated veneer lumber, a plywood, a fine wood shaving veneer, a shaving board, an oriented strand board, a density board, a finger joint board, a large core board and a veneer product prepared by using an adhesive which can generate the phosphorescent afterglow after being cured and then excited by ultraviolet irradiation, and the adhesive which can generate the phosphorescent afterglow after being excited by ultraviolet irradiation can be used in the artificial board in a whole body or can be applied to an artificial board structure in a matched and separated area with the adhesive which does not generate the phosphorescent afterglow after being cured.
3. The method for identifying the artificial board based on the adhesive ultra-long room temperature phosphorescent afterglow according to claim 1, wherein the light excitation condition in the step 1 is ultraviolet irradiation in a wavelength range of 250-400 nm.
4. The method for identifying the artificial board based on the adhesive ultra-long room temperature phosphorescent afterglow according to claim 1, wherein the collection in the step 2 is performed by one or more of an ultraviolet lamp, a spectrometer, an imaging device, a time-resolved lifetime testing device and a time-gated imaging device.
5. The method for identifying the artificial board based on the adhesive ultra-long room temperature phosphorescent afterglow according to claim 4, wherein the delayed luminescence image obtained in the step 2 is obtained through a time gating acquisition mode, and the acquisition time is set within a range of 0.1 s-60 s after excitation light is turned off.
6. The method for identifying the artificial board based on the adhesive ultra-long room temperature phosphorescent afterglow according to claim 1, wherein the preset information base in the step 3 is constructed by jointly combining luminescent colors, luminescent intensities, luminescent spectrums, delayed luminescent images, phosphorescent lifetime characteristic information and luminescent area configuration modes acquired by manufacturers, raw material types, batches, performance levels or other artificial board standard samples with known characteristic indexes under the same or comparable test conditions.
7. The method for identifying the artificial board based on the adhesive ultra-long room temperature phosphorescent afterglow according to claim 1 is characterized in that the matching in the step 3 is based on the combination identification of at least two optical characteristic parameters, wherein the optical characteristic parameters are at least two selected from the group consisting of luminous color, luminous intensity, emission spectrum, delayed luminous image, phosphorescent lifetime and luminous area configuration combination mode.
8. The method for identifying an artificial board based on adhesive ultra-long room temperature phosphorescent afterglow according to claim 1, wherein in the step 4, when at least two optical characteristic parameters of a sample to be tested correspond to preset information base parameters, the sample to be tested is judged to be matched with corresponding sample information.
9. The method for identifying the artificial board based on the adhesive ultra-long room temperature phosphorescent afterglow according to claim 1, wherein the identification result in the step 4 is the manufacturer, raw material, batch or authenticity of the artificial board.
10. The identification method of claim 1, wherein the identification process is a non-destructive inspection process.

Description

Artificial board identification method based on adhesive ultra-long room temperature phosphorescent afterglow Technical Field The invention belongs to the technical field of artificial board identification and optical information detection, and particularly relates to an artificial board identification method based on adhesive ultra-long room-temperature phosphorescent afterglow. Background The artificial board material such as plywood, shaving board, oriented strand board and medium density fiberboard has high utilization rate of raw materials, good processability and moderate cost, and is widely applied to the fields of furniture manufacturing, interior decoration, building templates, package transportation and the like. The existing plates are usually formed by compounding and pressing wood raw materials and adhesives, the core functions of the plates are mainly concentrated on bonding, reinforcing and forming, and the plates lack of material body identification features capable of reflecting product identity, source and batch information. The existing common artificial board identification modes mainly comprise code spraying, two-dimensional code labeling, laser engraving, ink printing, external radio frequency labeling and the like. The identification is mainly positioned on the surface of the plate or attached to the outside of the plate, is easily influenced by abrasion, pollution, covering, falling or manual replacement, is not directly related with the internal structural state of the material, and is difficult to realize the long-term stable and difficult-to-tamper identification. In recent years, room temperature phosphorescent materials have been widely focused in the fields of anti-counterfeiting, information encryption, delayed imaging, identity recognition and the like because of long afterglow life, time-resolved reading and strong background interference resistance. However, the existing room temperature phosphorescent system is mainly applied to films, ink, coatings or independent labels, and is less involved in constructing a stably identifiable room temperature phosphorescent signal directly at the interface of an adhesive layer inside an artificial board, and establishing a corresponding identification method based on the signal. Therefore, it is needed to establish an identification method based on the room temperature phosphorescent afterglow signal inside the artificial board, and to realize lossless and rapid identification of the production batch, the source information and the product identity of the artificial board by collecting, extracting and matching analysis of the delayed luminescence signal. Disclosure of Invention The invention aims to provide an artificial board identification method based on adhesive ultra-long room temperature phosphorescence afterglow, which aims to solve the problems that the existing artificial board identification mode depends on an external labeling, a two-dimensional code, a surface code spraying or an external electronic device, is easy to fall off and imitate and unhook with material body structural information. The identification method is based on delayed luminescence behavior generated by chemically embedded room temperature phosphorescence structural units in an adhesive layer interface inside an artificial board in a limited environment. Because of various interaction forces (such as intermolecular action and structural constraint) at the interface of the adhesive layer, the luminescent component in the adhesive is in a relatively stable limited state after curing, so that non-radiative transition is inhibited, the luminescent life is prolonged, and the adhesive can continuously emit light after the excitation light is removed. The delayed luminescence signal has repeatability and stability, and provides a reliable optical information basis for subsequent identification and comparison. Different from the traditional information identification mode depending on external additional identification, the identification method disclosed by the invention uses a room-temperature phosphorescence signal generated by an interface of an adhesive layer inside an artificial board as an information carrier, and the optical signal and a material structure are integrated and do not depend on an additional identification layer. Because the signal is derived from the internal interface structure of the material, the signal is not easily influenced by abrasion, pollution or artificial damage in the use process, so that the stability and the reliability of the identification information are improved. Meanwhile, through the combination matching of various optical characteristic parameters, the distinguishing degree between different samples can be obviously improved, and high-precision identification is realized. According to the invention, by changing parameters such as an adhesive system, adhesive sizing position preparation, a hot pressing process and the li