Nondestructive full-scale artificial board elasticity modulus and dynamic viscoelasticity testing device and method
A dynamic viscoelasticity and elastic modulus technology, applied in measuring devices, mechanical devices, instruments, etc., can solve the problems of low detection efficiency, damage, and little attention to dynamic mechanical properties, saving time and easy operation. Effect
Inactive Publication Date: 2015-06-17
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology
This method belongs to destructive testing, and the detection efficiency is low. It is only suitable for random inspection of products and can only be carried out in a laboratory environment.
[0004] The dynamic mechanical properties of wood-based materials, including wood-based panels, have received little attention due to the limitations of existing testing methods
Method used
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Embodiment 1
[0064] The specific implementation of the measuring device and the measuring process will be described below in conjunction with a measurement of a plate. The board material is medium density board (MDF), and the board size (length×width×thickness) is: 2441×1221×12.32mm. The special software used in the computer 21 for signal acquisition, analysis and processing is compiled by Labview virtual instrument language.
[0065] (1) Place the board.
[0066] The plate to be tested 4 is placed on the two supporting rods 5 of the measuring device, and the front connecting rod 13 and the rear connecting rod 6 are used as scales to determine the placement position. That is, the left and right sides of the measured plate 4 are aligned with the two ends of the two connecting rods, and the front and rear sides of the measured plate 4 are aligned with the outer sides of the two connecting rods.
[0067] (2) Set the storage directory and file name of the measurement results, and input the b...
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Abstract
The invention provides a nondestructive full-scale artificial board elasticity modulus and dynamic viscoelasticity testing device. The device comprises a mechanical structure part and a data processing part, wherein the mechanical structure part is mainly formed by two base supports, two support rods, two force sensors, a laser sensor, a front connecting rod, a rear connecting rod and the like; the data processing part comprises a signal conditioning box and a computer. A testing method comprises the following five steps: I. placing a board; II. setting a measuring result storage directory and a filename and inputting basic parameters of the board; III. measuring the board quality; IV. measuring the elasticity modulus and dynamic viscoelasticity; V. storing and displaying the measuring results. By adopting the testing device and the testing method, the elasticity modulus, the storage modulus and the loss modulus of the full-scale artificial board can be quickly and conveniently measured. Compared with the traditional measuring devices and methods, the nondestructive full-scale artificial board elasticity modulus and dynamic viscoelasticity testing device and method achieve nondestructive testing, save time and cost and are simple and convenient to operate.
Description
technical field [0001] The invention relates to a full-scale wood-based panel elastic modulus and dynamic viscoelasticity non-destructive testing device and testing method, belonging to the field of testing and testing of mechanical properties of materials. Background technique [0002] Full-scale wood-based panels refer to the most common wood-based panels at home and abroad in the production and sales of finished wood-based panels with a standard size of 2.44×1.22m, mainly including density fiberboard, particle board and plywood. my country is a big producer of wood-based panels, and its output ranks first in the world in recent years. [0003] At present, the elastic modulus detection of full-scale wood-based panels at home and abroad basically adopts the standard mechanical test piece detection method. This detection method is regulated by relevant national standards. First, several standard test pieces are cut from different parts of the large-size plate. The size of t...
Claims
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IPC IPC(8): G01N19/00
Inventor 张厚江周卢婧吴江
Owner BEIJING FORESTRY UNIVERSITY