Focusing vortex acoustic tweezers control system and method with obstacle avoidance control function

A vortex and acoustic tweezers technology, which is applied in the field of focused ultrasound therapy and small object manipulation, can solve the problems of reduced capture ability, difficult practical application, and great influence by obstacles, and achieve the effect of improving the capture ability

Pending Publication Date: 2021-03-26
NANJING NORMAL UNIVERSITY
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Problems solved by technology

[0004] The present invention aims at problems such as weak control ability, low positioning accuracy, great influence by obstacles, and difficulty in practical application existing in the existing acoustic tweezers control technology, and proposes a focusing vortex acoustic tweezers control system and method with obstacle avoidance control function, which solves the problem When the traditional vortex acoustic tweezers encounter rigid or strong scattering obstacles (such as bones), the sound pressure of the vortex acoustic field drops, the capture ability decreases, and even the serious problem that the vortex acoustic tweezers cannot be constructed

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  • Focusing vortex acoustic tweezers control system and method with obstacle avoidance control function

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Embodiment Construction

[0033] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] The specific implementation steps of the focusing vortex acoustic tweezers control method with obstacle avoidance control function described in the present invention are as follows:

[0035] (1) Based on the self-bending non-diffraction beam characteristics of a one-dimensional linear sound source, a one-dimensional groove modulation structure is designed using the binary phase system of the Bessel function to generate a non-diffractive half-Bessel beam with a circular propagation trajectory . On the basis of the self-bending half-Bessel beam generated by the one-dimensional linear sound source, the attenuation factor is introduced to suppress the tailing of the function, and the Heaviside function is introduced according to the radius of the fan-shaped transducer array to intercept the sound pressure distribution of th...

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Abstract

The invention provides a focusing vortex acoustic tweezers control system and a method with an obstacle avoidance control function. The active phase control and passive structure phase modulation of aplanar fan-shaped transducer array are utilized to construct the focusing vortex acoustic tweezers with a controllable obstacle avoidance cavity, and object control behind an obstacle is realized. The curvature radius of a self-bending wave beam arc track is regulated and controlled through the order and the wave number of a semi-Bessel sound beam, the hollow radius of a phase modulation disc isdetermined according to the size of an obstacle, and regulation and control over the shape and the size of an arc track obstacle avoidance cavity and the axial distance of the acoustic tweezers are achieved. The capture radius and the capture capability of the focusing vortex acoustic tweezers are further regulated and controlled through the vortex topological charge of the transducer. According to the invention, sound waves emitted by the transducer array can be guided to bypass bones and important organs to form the focusing vortex acoustic tweezers, rotary capture of drug particles is realized, the thermal therapy effect of a focal region can be enhanced by utilizing drug accumulation, and a new method is provided for application of the focusing vortex acoustic tweezers in biomedicine.

Description

technical field [0001] The invention relates to the fields of focused ultrasound therapy and small object manipulation (cells, medicines, stones, contrast agents) in biomedical applications, and in particular to a focused vortex acoustic tweezers manipulation system and method with obstacle avoidance manipulation functions. Background technique [0002] Acoustic tweezers manipulation has the advantages of non-invasiveness, no radiation, and good biocompatibility, and has received extensive attention in biomedical particle manipulation applications. The vortex sound field has a unique sound field distribution, and the vortex sound tweezers can be constructed to realize the rotating capture and central concentration of particles, which greatly improves the effects of ultrasound imaging, targeted drug delivery, and ultrasound therapy. Commonly used vortex sound field formation methods include active phase control technology and passive structure control technology. Active phase...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/34A61N7/02G08C23/02
CPCG10K11/34G08C23/02A61N7/02
Inventor 郭各朴浦仕府马青玉
Owner NANJING NORMAL UNIVERSITY
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