Acoustic levitation device and method in liquid environment

Abstract

The invention provides an acoustic levitation device in a liquid environment. The acoustic levitation device comprises a waveguide circular tube, a hydrophone, a transducer used for transmitting acoustic waves, a signal generator and an oscilloscope; the waveguide circular tube is in a shape of a cylindrical bucket with an opening in one end, the opening is sealed through a steel plate, and the waveguide circular tube is filled with a liquid medium; the transducer is arranged at the bottom of the waveguide circular tube, the piston type transducer is adopted and is connected with the signal generator outside the waveguide circular tube, and the hydrophone is suspended in the liquid medium and is connected with the oscilloscope outside the waveguide circular tube. An acoustic levitation method comprises the following steps that (1) a sound field in air is established; (2) a sound field in the liquid environment is calculated; (3) a weight threshold is measured; (4) according to an existing frequency, the corresponding waveguide circular tube is designed and organic glass is adopted as the side wall, the bottom end of the waveguide circular tube is provided with the transducer, the top end of the waveguide circular tube adopts a round face rigid reflection end made from steel, the height of an intermediate medium, such as water, reaches the optimum size of the waveguide circulartube through simulation calculation.

Description

technical field [0001] The invention belongs to the technical field of acoustic levitation, and in particular relates to an acoustic levitation device and method in a liquid environment. Background technique [0002] The suspension environment is an ideal working environment, which has many advantages, such as greatly reducing the energy loss caused by friction, the wear of devices, heat generation and vibration, etc., and can occupy a place in the mechanical field. For example, the design of the vibrator in the motor or transducer; another example is conducive to obtaining high-performance materials, and at the same time creates better conditions for the study of material solidification and high-temperature physical and chemical properties, so it can also be applied in the field of materials, etc. [0003] Currently commonly used levitation technologies include: ultrasonic levitation, electromagnetic levitation, electrostatic levitation, pneumatic levitation, etc. Among th...

AI Technical Summary

Problems solved by technology

Among them, 1) Acoustic levitation does not have any requirements for levitating objects, but the levitation ability of ultrasonic levitation in normal air environment is relatively weak. Due to the wavelength and power, it can only levitate smaller and lighter objects; High material requirements, strong electromagnetic, large radiation, low environmental protection and other issues; 3) Electrostatic levitation will cause harm to biological health due to the existence of an electric field, and cause adverse reactions to some chemical substances; 4) Pneumatic levitation due to loud noise, Difficult to accurately control and other shortcomings

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