Real-time detection system for wood microstructure characteristic changes

Abstract

The invention discloses a real-time detection system for wood microstructure characteristic changes, which comprises a loading unit, a microscopic unit, an image acquisition unit and an image processing unit, wherein the loading unit is used to stretch, compress, bend, twist or cut to-be-detected wood; the microscopic unit is used to magnify a to-be-detected area of the wood; the image acquisition unit is used to acquire surface image information of the area magnified through the microscopic unit; and the image processing unit is used to receive image information acquired by the image acquisition unit, calculate and obtain the micro-area strain information and the real-time microstructure change results of the to-be-detected wood. The system can measure micro-area tissue and cell strain to realize micro-area deformation quantization, and can monitor micro-area defects.

Description

technical field [0001] The invention relates to a real-time detection system for mechanical strength properties such as compression or tension and deformation microstructure characteristics of wood and wood composite materials. Background technique [0002] In the process of production, processing and use of wood and wood composite materials, it is inevitable to encounter mechanical behaviors such as compression or tension. The detection of mechanical properties of materials is the key to ensuring the quality of subsequent products and their rational use. The performance and microstructural effects of materials or products, as well as the influence of microstructural features on the overall performance of materials, are still unclear. [0003] For the current detection methods, the single macroscopic mechanical property detection is the main one. This detection method has many defects and shortcomings: [0004] 1. Judging the performance of wood materials only by macroscop...

AI Technical Summary

Problems solved by technology

[0004] 1. Judging the performance of wood materials only by macroscopic mechanical behavior is insufficient to grasp the performance of the material itself;

[0005] 2. Only the result of the mechanical behavior of the material can be understood, but the cause of the mechanical behavior is not known;

[0006] 3. The testing process cannot take into account the temperature, moisture content and other influencing factors of the tested material;

[0007] 4. The strain obtained during the detection process is the average strain of the material as a whole, which does not reflect the strain of different organizational structures of the material; it cannot reflect the relationship between the structure of each part of the wood and the overall stress and strain;

[0008] 5. For an anisotropic heterogeneous material such as wood, the obtained strain results are single, which cannot truly reflect the stress-strain results of each tissue structure of wood;

[0009]6. After the test is over, the springback of the tested material cannot be obtained in time, and the residual stress of the tested material cannot be analyzed

Images