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剪切與表面波實驗組

產品型號: VK-19004
廠牌名稱: GAMPT

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In the classic applications of ultrasound, such as e.g. the time of flight measurements in liquids (level measurement, flow measurement), only the longitudinal propagation of the ultrasonic waves plays a role. Ultrasonic waves can, however, also propagate in the form of shear and surface acoustic waves (SAWs), especially in solid bodies. These wave modes, their propagation characteristics and their dependence on elastic material properties make possible a large number of new methods in material testing (aircraft construction), signal processing (SAW filter) and modern medicine (elastography).
With this set it is possible to carry out experiments to demonstrate the mode transformation of ultrasonic waves at boundaries between liquids and solids or at boundaries of different solids. They can also be used to determine the sound velocity of shear and surface acoustic waves (Rayleigh and Lamb waves) in different material samples. These measurements make it possible to determine the elastic coefficients of the materials such as the elasticity modulus and shear modulus.
This set can also be used to demonstrate the dispersion of ultrasonic waves (frequency dependence of sound velocity) by means of the propagation of Lamb waves on thin glass sheets.
A crack depth test can be carried out on an aluminium sample by means of Rayleigh waves as an application of surface waves in non-destructive testing (NDT).

內含

10400 Ultrasonic echoscope GS200
10151 2 ultrasonic probes 1 MHz
10152 2 ultrasonic probes 2 MHz
10154 2 ultrasonic probes 4 MHz
10218 Shear wave set
10230 Rayleigh wave attachments (pair)
10232 Rayleigh wave test block
10250 Hydrophone
10300 Lamb wave set
70200 Ultrasonic gel

 

可進行實驗

液體中的聲波衰減

固體中的剪力波

超音波的瀰散

應用領域

物理教學

超音波分析/超聲波分析

 

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