Airborne Ultrasonic Test System for Test Objects
A technology for test objects and test systems, applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, and measuring devices, etc. Issues such as ringing effects are not displayed
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[0064] figure 1 Shown in is a typical inventive device. The onboard ultrasonic waves 5 are emitted from the thermoacoustic generator 1 a into the air or into another sound propagation medium (eg a specific gas 10 that may be present in the test environment). Such specific gases may include, for example, nitrogen or carbon dioxide or gas mixtures, for example, thorlabs Inc ( https: / / www.thorlabs.de ), which is favored due to the fact that the test object 3 will not be exposed to oxygen, which is also enhanced by the fact that the pressure-related change in the refractive index depends on the medium Sensitivity of diaphragmless and non-resonant optical microphones is preferred. The sound propagation medium can also be any liquid (eg, oil, water, blood or others); however, the efficiency of the thermoacoustic generator is more favorable when used in gas. As a result, the sound propagation medium will generally be ordinary ambient air. Sound waves are incident on the test ob...
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