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Online nondestructive detecting instrument for wood materials

A wood material, non-destructive testing technology, applied in the direction of instruments, scientific instruments, analytical materials, etc., can solve the problems of no use value, time-consuming and unsuitable for online detection, etc., and achieve the effect of improving the utilization rate

Inactive Publication Date: 2010-04-21
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the test piece tested by this method has no use value, it can only be tested by sampling, and there is a certain degree of randomness and contingency
Moreover, this method takes a long time and is not suitable for online detection

Method used

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  • Online nondestructive detecting instrument for wood materials
  • Online nondestructive detecting instrument for wood materials
  • Online nondestructive detecting instrument for wood materials

Examples

Experimental program
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Embodiment Construction

[0026] The following is attached Figure 1-Figure 7 Embodiments of the present invention will be described in detail.

[0027] refer to figure 1 , image 3 as well as Figure 7 , the non-destructive testing instrument of the present invention is divided into frame 604 altogether, control device 705, driving device 701,704, the clamping device 702,703 of wooden material, the triggering of signal and the detection device of signal (mandrel 301 trigger signal, sensor 102 , sensor 106 detection signal). The control device 705 controls the driving device 701 to make the wooden material clamping devices 702 and 703 clamp the wooden material sample to be tested. In addition, the control device 705 controls the drive device 704 to advance the mandrel 301 in the axial direction and impact the wooden material 101 to be tested to trigger the signal. Moreover, the control device 705 makes the sensor 102 and the sensor 106 detect signals by controlling the drive device 704 and the hol...

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PUM

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Abstract

The invention provides an online nondestructive detecting instrument for wood materials, which relates to the online nondestructive detection of the wood materials, and can measure the elastic modulus of flitch, board squared timbers and log sections to evaluate the material properties of the materials. The online nondestructive detecting instrument controls a driving and feeding device so that two ends of a tested wood material are clamped by a wood material clamping device. A signal triggering and detecting device can trigger signals and detect transmitted signals and received signals. The transmitted signals and the received signals are amplified by a signal amplifier and then are transmitted to a fast fourier transform (FFT) analyzer to measure the time difference of trigger signals and the received signals, and the dynamic elastic modulus can be calculated by using a formula so as to evaluate the material properties of the tested wood material. The online nondestructive detecting instrument does not destroy the integrity of a tested piece, improves the labor efficiency, reduces the detection cost and lightens the labor intensity.

Description

technical field [0001] The invention relates to an on-line non-destructive testing instrument for wooden materials, which is an instrument for measuring the elastic modulus of wood squares, plank squares and log sections by using the longitudinal wave propagation method, so as to realize the evaluation of their material properties. Background technique [0002] In order to use wood materials correctly and rationally, it is necessary to test their internal material properties, and the elastic modulus is one of the testing indicators. The traditional method is destructive testing, that is, the wooden material is destroyed and then tested. Since the test pieces tested by this method have no use value, they can only be tested by sampling, and there is a certain degree of randomness and contingency. Moreover, this method takes a long time and is not suitable for online detection. [0003] The detection method of longitudinal wave propagation is to connect the two ends of the te...

Claims

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Application Information

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IPC IPC(8): G01N29/07G01N29/22
Inventor 方业成胡英成
Owner NORTHEAST FORESTRY UNIVERSITY
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