Device and method for generating spatially focused vortex sound field

A technology of spatial focusing and generating device, which is applied in ultrasonic instruments, ultrasonic detection and control, and ultrasonic physics to achieve the effect of reducing complexity, complexity and cost, and strong sound radiation force.

Active Publication Date: 2019-01-25
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the defects of the existing vortex sound field generation technology and the lack of research on the focused vortex sound field, the purpose of the present invention is to provide a device and method for generating a spatially focused vortex sound field

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  • Device and method for generating spatially focused vortex sound field
  • Device and method for generating spatially focused vortex sound field
  • Device and method for generating spatially focused vortex sound field

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0039] (1) Generating system of vortex sound field

[0040] see figure 1 The generation system of the vortex sound field includes a power supply 1, a signal generator 2, a power amplification module 3, an impedance matching circuit 4 and a focused ultrasonic split array spherical transducer 5, wherein the power supply 1 is used to supply the signal generator 2 and the power amplification module 3 Provide energy, the signal generator 2 generates multi-channel phase (according to the phase requirements of the vortex sound field) and frequency (according to the frequency of the transducer) adjustable square wave signal, which is filtered by a passive primary low-pass filter to filter out the middle and high frequencies of the signal The component converts the square wave into a sine wave approximately, and then amplifies the amplitude of the mul...

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Abstract

The invention provides a device and method for generating a spatially focused vortex sound field. The device comprises a spherical focusing ultrasonic transducer and a driving circuit. Multiple channels of driving signals corresponding to the number of splitting array elements are generated, the power is amplified, and the phase difference and amplitude of the driving signals input to every two adjacent array elements in the splitting array elements are kept consistent through impedance matching. A spherical focusing ultrasound splitting array transducer is adopted for generating the vortex sound field, and compared with a current mode of adopting a transducer array composed of hundreds of thousands of transducers for generating the vortex sound field, the method has the advantage that cumbersome and complex effects of a system caused by the vortex sound field can be effectively reduced. The device and the method utilize the advantage of geometric focusing of the spherical focusing ultrasound transducer to produce the highly focused vortex sound field, so that efficient and fine acoustic manipulation of particles are achieved.

Description

technical field [0001] The invention belongs to the fields of ultrasonic physics, ultrasonic instruments, and ultrasonic detection and control, and in particular relates to a generating device and method for a space-focused vortex sound field. Background technique [0002] Spatial aggregation of micro-nano particles is of great significance in the design and processing of micro-nano devices, crystal growth, artificial tissue culture, cell separation and filtration, etc. Correspondingly, many fields such as magnetism, electricity, optics, and acoustics Each discipline has developed corresponding manipulation methods. Specifically, magnetic aggregation uses magnetic force to aggregate particles, but this method requires that the particles must be magnetic or can be magnetized; the most common method of electrical aggregation is dielectrophoresis, which uses the interaction force between an electric field and polarized particles The spatial position of the particles is regulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B1/02
CPCB06B1/0238B06B2201/76
Inventor 万明习郭世放杜轩王昕郭叙言
Owner XI AN JIAOTONG UNIV
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