Due to the short wavelength of the ultrasonic wave, the vibrating disk can reflect, refract and focus the ultrasonic rays like light. Abide by the laws of geometric optics. That is, when ultrasonic ra
1. Beam characteristics
Due to the short wavelength of the ultrasonic wave, the vibrating disk can reflect, refract and focus the ultrasonic rays like light. Abide by the laws of geometric optics. That is, when ultrasonic rays are reflected from the surface of a substance, the angle of incidence is equal to the angle of reflection. When the rays pass through one substance and enter another substance with different densities, they will be refracted, that is, to change its transmission direction. The greater the difference in material density, the greater the refraction.
2. Absorption characteristics
When sound waves propagate in various materials, as the propagation interval increases, the intensity will gradually weaken, because the material has to absorb its energy. Regarding the same substance, the higher the frequency of the sound wave, the stronger the absorption. Regarding a sound wave of a certain frequency, the absorption is the most harmful when propagating in gas, the absorption is relatively weak when propagating in liquid, and the least absorption when propagating in solid.
3. Ultrasonic energy transmission characteristics
Vibrating disk ultrasonics have been widely used in various industrial sectors in the past, and the main point is that they have much more powerful power than sound waves. Why is there strong power? Because when a sound wave reaches a certain material, the molecules in the substance also vibrate due to the action of the sound wave. The frequency of the vibration is the same as the frequency of the sound wave. The frequency of the molecular vibration determines the speed of the molecular vibration. The higher the frequency, the higher the speed.
The energy obtained by the vibration of material molecules is not only related to the mass of the molecule, but also determined by the square of the vibration speed of the molecule. Therefore, if the frequency of the sound wave is higher, that is, the higher the energy and the frequency of the ultrasonic wave will be obtained by the material molecule. It can be much higher than sound waves, so it can make material molecules obtain a lot of energy; in other words, ultrasound itself can supply materials with enough power.
4. The sound pressure characteristics of ultrasound
Vibrating disk When sound waves pass into an object, the vibration of the sound waves causes the material molecules to shrink and dense, which will change the pressure on the material. The phenomenon of additional pressure caused by sound wave vibration is called sound pressure.
Post time: Aug-31-2022