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Codable ultrasonic tweezers system and implementation method thereof

An implementation method, ultrasonic technology, applied in the direction of sounding devices, instruments, etc., can solve the problems of large number of transducers, difficulty in independent control, inability to change the focus position of ultrasonic waves, and the directional movement of particles, so as to achieve the effect of simplifying the signal generation system

Pending Publication Date: 2022-08-02
XI AN JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a coded ultrasonic tweezers system and its implementation method for the deficiencies in the above-mentioned prior art, so as to solve the problem that the ultrasonic focus position cannot be changed in the artificial structure plate and the directional movement of particles can be realized by moving the focus point. Manipulation; and the problem of the large number of transducers in the transducer array and the difficulty of independent control

Method used

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  • Codable ultrasonic tweezers system and implementation method thereof
  • Codable ultrasonic tweezers system and implementation method thereof
  • Codable ultrasonic tweezers system and implementation method thereof

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Embodiment approach

[0069] see figure 1 , a method for implementing a coded ultrasonic tweezers of the present invention, comprising the following steps:

[0070] S1. Determine the operating frequency to be 20-60 kHz, and preliminarily determine the parameters of the flow channel unit, including the number of flow channels, area, wall thickness, slit area, number of resonant cavities, volume of resonant cavity and other parameters;

[0071] The size parameters of the flow channel unit vary with the determination of the frequency. The overall value is λ / 30~λ / 6, the number of resonant cavities is 4~7, and the number of flow channels is 16~30. Materials with high acoustic impedance, such as stainless steel, are preferred.

[0072] S2. Use commercial finite element simulation software to simulate the ultrasonic time-domain signal at the outlet of the flow channel with the change of the cavity volume, and calculate the amplitude and phase changes of the time-domain signal;

[0073] The finite element...

Embodiment

[0083] Design an acoustic tweezers system with 5 resonant cavities and 24 flow channels. The ultrasonic operating frequency is determined to be 50kHz. The three-dimensional schematic diagram and plan view of the flow channel structure are as follows Figure 4 and Figure 5 As shown, the number of resonant cavities is determined to be 5, and the size information is h1=1mm, h2=5mm, h3=1mm, h4=0.5mm, L1=1mm, L2=3mm, L3=0.3mm, w1=5mm, w2 =4mm.

[0084] hx is variable to adjust the cavity volume, which varies from 0 to 5 mm.

[0085] w1 is the thickness of the flow channel unit, and w2 is the thickness of the inner cavity of the flow channel unit.

[0086] The number of flow channels is determined to be 24, and the material is stainless steel. Since the cross-section of the resonant cavity is determined, the volume change will be represented by the height of the resonant cavity.

[0087] The variation of the amplitude and phase with the height of the resonator is obtained by the...

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Abstract

The invention discloses a coding ultrasonic tweezers system and an implementation method thereof, a group of flow channel units filled with water is adopted to form a metasurface, each flow channel unit comprises a plurality of Helmholtz resonant cavities capable of mechanically adjusting the volume of a cavity, and the volume of the cavity in each flow channel unit is controlled by a steering engine; the ultrasonic phase in the flow channel is regulated and controlled by adjusting the volume of the cavity, ultrasonic waves are focused at any determined position by adjusting the phase of each flow channel unit, then the sound potential well is achieved, particles are captured, and the volume of the cavity is further adjusted through steering engine coding so that directional movement and dynamic control of the particles can be achieved. The problem that the ultrasonic focusing position cannot be changed in an artificial structure flat plate is solved, and particle directional movement and control are achieved by moving a focusing point. The number of transducers in the transducer array is large, and independent control is difficult.

Description

technical field [0001] The invention belongs to the technical field of acoustic manipulation, and in particular relates to a coded ultrasonic tweezers system and an implementation method thereof. Background technique [0002] With the development of biomedicine and other fields, micro-manipulation technology that can achieve precise capture and directional manipulation of cells, microorganisms, tiny particles and other objects has become more and more important. Micro-manipulation technology can be divided into contact and non-contact. The contact type has certain technical limits and can easily cause irreversible damage to the manipulated object, so the non-contact micro-manipulation device and method have huge advantages. [0003] Non-contact type can be divided into optical field, magnetic field, microfluidics, ultrasound and other fields according to the realization method. Compared with other technologies, the ultrasonic technology widely used in medical testing and oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/172
CPCG10K11/172G10K2210/32272
Inventor 张留洋李文康沈忠磊殷玮王星雨王中兴韩东海
Owner XI AN JIAOTONG UNIV
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