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Piezoelectric atomizing device has extensive application in many fields and is beneficial to people's livelihood. The areas of aerospace, medical and health, energy saving have raised a high demand for atomizer. The relationship between geometric parameters of atomizer pores and particle size of atomized droplet is crucial that we haven't known yet. In this study, the author measured parameters of...
For the better performance of piezoelectricity actuated ultrasonic nebulizer, some factors, which may have effect on the performance, are analyzed. A conclusion that the change of the cone angle in the vibration of the nebulizer does some contribution to the performance is got. According to this fact, a concept “moving cone angle” is put forward. The working principle of “moving cone angle” is introduced,...
This paper present a wavelet-fractal dimension approach for extracting feature from ultrasonic non-destructive evaluation (NDE) data of a test multilayer adhesive structure specimen. These features are then used to estimate the specimen's bonded quality. When the multilayer adhesive structure undergo ultrasonic NDE, echo from interior layers often overlap severely, causing information from individual...
This paper present a wavelet-packet approach for extracting feature from ultrasonic non-destructive evaluation data of a test multi-layer adhesive structure specimen. These features are then used to obtain an estimate of the specimen's bonded properties. When the multi-layer adhesive structure undergo ultrasonic non-destructive evaluation, echo from interior layers often overlap severely, causing...
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