Woods and wooden composite material shearing modulus non destructive checkers

Abstract

A device for testing shear modulus of wood and wood composite material nondestructively is featured as setting compressed spring on frame and using the spring to set plastic board on frame; setting left and right sensors separately on two sides of plastic board; placing form support blocks under the two sensors and connecting left sensor, left amplifier and fast Fourier transform analyzer separately with right sensor, right amplifier and fast Fourier transform analyser.

Description

technical field

[0001] The invention belongs to material performance testing equipment, which is mainly used for measuring the shear modulus of wood and wood composite materials. Background technique

[0002] In order to use wood and wood composite materials correctly and reasonably, it is necessary to test the material properties, and its shear modulus is one of the testing indicators. How to make the sensor fully contact with the test piece is a key issue during detection. At present, instant adhesives are often used to stick the sensor and the test piece together, but there are many disadvantages in doing so: one is to use a knife or other tools to separate the sensor from the test piece after testing a test piece, which is time-consuming and laborious; In the process of separating the sensor from the test piece, it is easy to damage the sensor and the tested object, and the sensor is a more expensive precision component, resulting in waste; at the same time, the tested ...

Examples

Embodiment Construction

[0009] The best embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings. The non-destructive testing device for shear modulus of wood and wood composite materials includes sensors 1 and 10, signal amplifiers 9 and 6, and a fast Fourier transform (FFT) analyzer 7, and a compression spring 2 is installed on the inner upper wall of the frame 4, and a plastic plate 3 The end face is connected with the lower end face of the compression spring 2, and the plastic plate 3 is installed inside the frame 4; the left sensor 1 and the right sensor 10 are installed on the left and right sides of the lower end face of the plastic plate 3 respectively; the foam support block 5 is equipped with Installed below the left and right side sensors 1 and 10; the wires respectively connect the left side sensor 1, the left side signal amplifier 9, the fast Fourier transform FFT analyzer 7 and the right side sensor 10, the right side signal ampl...

technical field

[0001] The invention belongs to material performance testing equipment, which is mainly used for measuring the shear modulus of wood and wood composite materials. Background technique

[0002] In order to use wood and wood composite materials correctly and reasonably, it is necessary to test the material properties, and its shear modulus is one of the testing indicators. How to make the sensor fully contact with the test piece is a key issue during detection. At present, instant adhesives are often used to stick the sensor and the test piece together, but there are many disadvantages in doing so: one is to use a knife or other tools to separate the sensor from the test piece after testing a test piece, which is time-consuming and laborious; In the process of separating the sensor from the test piece, it is easy to damage the sensor and the tested object, and the sensor is a more expensive precision component, resulting in waste; at the same time, the tested ...

Examples

Embodiment Construction

[0009] The best embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings. The non-destructive testing device for shear modulus of wood and wood composite materials includes sensors 1 and 10, signal amplifiers 9 and 6, and a fast Fourier transform (FFT) analyzer 7, and a compression spring 2 is installed on the inner upper wall of the frame 4, and a plastic plate 3 The end face is connected with the lower end face of the compression spring 2, and the plastic plate 3 is installed inside the frame 4; the left sensor 1 and the right sensor 10 are installed on the left and right sides of the lower end face of the plastic plate 3 respectively; the foam support block 5 is equipped with Installed below the left and right side sensors 1 and 10; the wires respectively connect the left side sensor 1, the left side signal amplifier 9, the fast Fourier transform FFT analyzer 7 and the right side sensor 10, the right side signal ampl...

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