Ultrasonic Extractor Application

Ultrasound is an important branch or component of acoustics. The ultrasonic extraction machine mainly studies the generation, propagation, reception and interaction of ultrasound in various substances, various effects and applications. Sound waves are mechanical waves, which are the propagation of mechanical vibrations in elastic media. Modern acoustics have covered the frequency range from 10-4 to 1014Hz, which is equivalent to from infrasound vibrating once in about 3 hours to molecular thermal vibrations with wavelengths shorter than the atomic spacing in solids, that is, spanning a broad frequency band of the order of 1018. This also means that, now, people have mastered the modern technology of generating and measuring sound waves of almost any frequency.

In terms of frequency range, ultrasound refers to sound with frequencies above the frequency range of audible sound. According to the statistical law of the human ear, in acoustics, the upper limit of the frequency of audible sound is 2 × 104 Hz. In general, ultrasound is a sound wave with a frequency higher than 20KHz. To be more specific, in the ultrasound frequency band, ultrasound with a frequency higher than 108 Hz is called hypersonic. In particular, the 108-1012 Hz frequency band is also called microwave ultrasound because it corresponds to the microwave frequency band in the electromagnetic spectrum.

In terms of power range of ultrasonic extraction machine, continuous wave ultrasonic is generally in the range of milliwatts to tens of kilowatts. Pulsed ultrasound can be scaled to fractions of a milliwatt to several megawatts. Correspondingly, from the perspective of sound intensity, the upper limit of focused continuous wave ultrasound in liquid is limited by cavitation, and the upper limit can reach about tens of kilowatts per square centimeter; while the focus of pulsed ultrasound in the center of the focal spot can even reach tens of megabytes. Watts per square centimeter. Obviously, ultrasound includes a rich research content with a large dynamic range from linear to nonlinear acoustics.

From the perspective of the propagation medium, ultrasound can effectively propagate in gases, liquids, solids, solid melts and other substances. In these media, ultrasonic waves of different frequencies, powers and intensities have their unique propagation characteristics and effects, so they also have their corresponding research contents and wide applications.